/* ============================================================
   Kiwippy — dark, minimalist language study missions
   Theming is driven by CSS variables. Two themes are provided
   via body classes: .theme-pro (default) and .theme-kawaii.
   Pure CSS visual identity: gradients, glow, geometric shapes.
   ============================================================ */

/* ---------- Theme: Professional Dark (default) ---------- */
.theme-pro {
  --bg:         #0b0d14;
  --bg-top:     #141826;   /* radial gradient top color */
  --panel:      #161a27;
  --panel-soft: #1c2132;
  --text:       #e9ecf5;
  --muted:      #8b93ab;
  --faint:      #5b6480;

  --accent:     #7c5cff;   /* violet */
  --accent-2:   #29d3c2;   /* teal   */
  --success:    #36e0a0;
  --warning:    #ffce5c;
  --danger:     #ff6b81;

  --border:     #262c40;
  --shadow:     0 18px 50px -20px rgba(0,0,0,.8);
  --glow:       0 0 22px -2px var(--accent);
  --grid-line:  rgba(255,255,255,.025);
  --on-accent:  #0b0d14;   /* text color on bright accent buttons */
  --check-ink:  #06281d;

  /* Kiwippy mascot brand tokens (reuse across UI + games) */
  --kiwi-body-top:    #47d7bd;
  --kiwi-body-deep:   #193f4f;
  --kiwi-visor-cyan:  #77f6ff;
  --kiwi-visor-violet:#b999ff;
  --kiwi-beak:        #ffce5c;
  --kiwi-core:        #77f6ff;
  --kiwi-glow:        rgba(119,246,255,.45);
}

/* ---------- Theme: Soft Kawaii ---------- */
.theme-kawaii {
  --bg:         #efe3f1;   /* muted lavender — soft, not eye-burning white */
  --bg-top:     #f7ecf6;
  --panel:      #fdf4fa;
  --panel-soft: #f6e9f4;
  --text:       #4a3a55;   /* deep plum — strong contrast on light */
  --muted:      #8d7a98;
  --faint:      #b6a6c0;

  --accent:     #ff7fae;   /* pink */
  --accent-2:   #9d8bff;   /* lavender */
  --success:    #3fbf92;
  --warning:    #f0a83c;
  --danger:     #f0688c;

  --border:     #ecd6ea;
  --shadow:     0 18px 44px -22px rgba(120,70,130,.45);
  --glow:       0 0 24px -4px var(--accent);
  --grid-line:  rgba(130,80,140,.06);
  --on-accent:  #ffffff;
  --check-ink:  #0c3a2a;
}

/* ---------- Theme: Warm Cozy ---------- */
.theme-cozy {
  --bg:         #ece1cd;   /* muted parchment — warm, not bright */
  --bg-top:     #f2e9d8;
  --panel:      #fbf4e6;   /* warm cream cards */
  --panel-soft: #f1e5cf;
  --text:       #483722;   /* deep warm brown — strong contrast */
  --muted:      #8a755a;
  --faint:      #b3a081;

  --accent:     #e08e4a;   /* amber */
  --accent-2:   #d2705a;   /* terracotta */
  --success:    #6f9e5a;   /* warm sage */
  --warning:    #c8761f;
  --danger:     #c75b54;

  --border:     #e2d2b3;
  --shadow:     0 18px 44px -22px rgba(110,80,40,.42);
  --glow:       0 0 24px -4px var(--accent);
  --grid-line:  rgba(120,90,50,.06);
  --on-accent:  #ffffff;
  --check-ink:  #2e2410;
}

:root {
  --radius:    20px;
  --radius-sm: 13px;
  --ease:      cubic-bezier(.22,.85,.3,1);

  /* Spacing system — keeps breathing room consistent app-wide */
  --space-cta:     28px;   /* gap above action buttons / button groups */
  --space-section: 30px;   /* gap above larger blocks (e.g. landing actions) */
}

/* ============================================================
   Study-section accents — layered ON TOP of the chosen theme.
   A body class (e.g. .section-grammar) defines the section
   palette; the override below re-scopes --accent only inside
   the roadmap / trophy screens and the mission modal, so the
   global theme (top bar, hub, etc.) is left untouched.
   ============================================================ */
.section-grammar { --section-accent: #7c5cff; --section-accent-2: #4f8cff; }
.section-vocab   { --section-accent: #29d3c2; --section-accent-2: #3fb98a; }
.section-verbs   { --section-accent: #f0a13c; --section-accent-2: #ef7d4e; }
.section-kanji   { --section-accent: #ff6b81; --section-accent-2: #e0568f; }

[class*="section-"] #screen-grammar-cats,
[class*="section-"] #screen-vocab-cats,
[class*="section-"] #screen-vocab-study,
[class*="section-"] #screen-roadmap,
[class*="section-"] #screen-hiragana,
[class*="section-"] #screen-katakana,
[class*="section-"] #screen-kanji-levels,
[class*="section-"] #screen-kanji-n5,
[class*="section-"] #screen-kanji-group,
[class*="section-"] #screen-trophies,
[class*="section-"] .modal {
  --accent:   var(--section-accent, var(--accent));
  --accent-2: var(--section-accent-2, var(--accent-2));
  --glow:     0 0 22px -2px var(--section-accent);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  background: radial-gradient(140% 120% at 50% -10%, var(--bg-top) 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  transition: background .5s var(--ease), color .5s var(--ease);
}

/* ---------- Ambient background ---------- */
.ambient { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .35; transition: background .5s; }
.theme-kawaii .orb { opacity: .5; }
.orb-a { width: 360px; height: 360px; top: -90px; right: -70px;
  background: radial-gradient(circle, var(--accent), transparent 70%); }
.orb-b { width: 320px; height: 320px; bottom: -110px; left: -80px;
  background: radial-gradient(circle, var(--accent-2), transparent 70%); }
.grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 30%, transparent 80%);
}

/* ---------- Top bar ---------- */
.topbar {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  max-width: 720px; width: calc(100% - 24px); margin: 12px auto 0;
  border: 1px solid color-mix(in srgb, var(--accent-2) 18%, var(--border));
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(12,18,34,.72), rgba(18,22,40,.48)),
    color-mix(in srgb, var(--panel) 70%, transparent);
  box-shadow: 0 18px 60px -32px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 12px;
  font-size: 20px; font-weight: 700; color: #fff;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: var(--glow);
}
.ky-brand-mark {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background:
    linear-gradient(135deg, rgba(119,246,255,.18), transparent 36%),
    linear-gradient(145deg, rgba(124,92,255,.95), rgba(41,211,194,.9));
  border: 1px solid rgba(119,246,255,.46);
  box-shadow: 0 0 18px -5px rgba(41,211,194,.75), inset 0 1px 0 rgba(255,255,255,.24);
}
.ky-brand-mark::before,
.ky-brand-mark::after {
  content: "";
  position: absolute;
  z-index: -1;
  background: rgba(255,255,255,.34);
}
.ky-brand-mark::before {
  width: 28px;
  height: 1px;
  left: -5px;
  top: 9px;
  transform: rotate(-28deg);
}
.ky-brand-mark::after {
  width: 18px;
  height: 1px;
  right: -3px;
  bottom: 9px;
  transform: rotate(-28deg);
}
.ky-monogram {
  font-size: 16px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
  color: #f7ffff;
  text-shadow: 0 0 10px rgba(119,246,255,.76);
}
.kiwi-brand-mark {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 42% 22%, rgba(255,255,255,.46), transparent 23%),
    linear-gradient(145deg, rgba(41,211,194,.92), rgba(25,63,79,.98) 72%);
  border: 1px solid rgba(119,246,255,.46);
  box-shadow: 0 0 18px -5px rgba(41,211,194,.72), inset 0 1px 0 rgba(255,255,255,.22);
}
.kiwi-brand-body {
  position: relative;
  display: block;
  width: 22px;
  height: 27px;
  border-radius: 48% 48% 44% 44% / 42% 42% 56% 56%;
  background:
    radial-gradient(circle at 36% 18%, rgba(232,255,248,.95), transparent 18%),
    linear-gradient(150deg, #6ff5d8 0%, #2bbfa9 46%, #173849 100%);
  border: 1px solid rgba(210,255,249,.44);
  box-shadow: inset 0 -5px 10px rgba(4,17,29,.28);
}
.kiwi-brand-body::before,
.kiwi-brand-body::after {
  content: "";
  position: absolute;
}
.kiwi-brand-body::before {
  width: 13px;
  height: 6px;
  left: 4px;
  top: 7px;
  border-radius: 999px;
  background: rgba(5,16,28,.86);
  border: 1px solid rgba(119,246,255,.74);
  box-shadow: 0 0 8px rgba(119,246,255,.42);
}
.kiwi-brand-body::after {
  width: 4px;
  height: 4px;
  left: 9px;
  top: 16px;
  border-radius: 50%;
  background: #77f6ff;
  box-shadow: 0 0 7px rgba(119,246,255,.65);
}
.kiwi-brand-visor {
  position: absolute;
  width: 6px;
  height: 2px;
  left: 8px;
  top: 10px;
  border-radius: 999px;
  background: #dfffff;
}
.kiwi-brand-beak {
  position: absolute;
  left: 9px;
  top: 13px;
  width: 0;
  height: 0;
  border-left: 3px solid transparent;
  border-right: 3px solid transparent;
  border-top: 5px solid #ffce5c;
  filter: drop-shadow(0 1px 0 rgba(0,0,0,.16));
}
/* ---------- CSS-only brand logo (open book — language neutral) ----------
   Sized in em, so it scales with the host tile's font-size (top bar + hero).
   No Japanese characters: the global brand stays multilingual. */
.logo-book {
  position: relative;
  width: 1.2em; height: .9em;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,.22));
}
.logo-book::before,
.logo-book::after {
  content: "";
  position: absolute; top: 0; bottom: 0;
  width: .56em;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 .14em,
      color-mix(in srgb, var(--accent) 32%, transparent) .14em .17em
    ),
    #fff;
  background-clip: padding-box;
}
.logo-book::before {
  left: 0;
  border-radius: .16em .05em .05em .16em;
  transform: skewY(11deg);
  transform-origin: bottom right;
}
.logo-book::after {
  right: 0;
  border-radius: .05em .16em .16em .05em;
  transform: skewY(-11deg);
  transform-origin: bottom left;
}
.brand-name {
  font-size: 22px; font-weight: 700; letter-spacing: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.topbar-right { display: flex; align-items: center; gap: 8px; min-width: 0; }
.topbar-account[hidden] { display: none !important; }
.topbar-account {
  display: flex; align-items: center; gap: 8px;
  max-width: 42vw;
}
.account-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  object-fit: cover; border: 1px solid var(--border);
  background: var(--panel-soft);
}
.account-name {
  font-size: 12px; font-weight: 600; color: var(--muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 14ch;
}
.account-signout { font-size: 11px; padding: 5px 8px; flex-shrink: 0; }

.stats { display: flex; gap: 8px; }
.stat {
  display: flex; align-items: center; gap: 7px;
  padding: 6px 10px;
  background: rgba(15, 23, 42, .56);
  border: 1px solid color-mix(in srgb, var(--accent-2) 16%, var(--border));
  border-radius: 12px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
.stat-text { display: flex; flex-direction: column; line-height: 1; }
.stat-text b { font-size: 14px; }
.stat-text small { font-size: 9px; color: var(--muted); letter-spacing: .4px; text-transform: uppercase; }
.stat-icon { width: 16px; height: 16px; border-radius: 5px; flex: 0 0 auto; }
.stat-level  { background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.stat-streak { border-radius: 50% 50% 50% 0; transform: rotate(45deg);
  background: linear-gradient(135deg, var(--warning), var(--danger)); }
.stat-coin   { border-radius: 50%; background: radial-gradient(circle at 35% 30%, #fff2c2, var(--warning)); }

/* ---------- EXP rail ---------- */
.exp-rail {
  position: relative; z-index: 2;
  max-width: 720px; width: calc(100% - 34px); margin: 10px auto 0;
  height: 6px; border-radius: 99px;
  background: rgba(37, 49, 74, .72);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.04);
}
.exp-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 99px;
  transition: width .7s var(--ease);
}
.exp-label {
  position: absolute; right: 10px; top: -16px;
  font-size: 9px; color: var(--faint); letter-spacing: .5px;
}

/* Hide HUD on the welcome screen for a clean landing */
.view-welcome .topbar,
.view-welcome .exp-rail { display: none; }

/* ---------- Stage / screens ---------- */
.stage {
  position: relative; z-index: 1;
  flex: 1;
  max-width: 720px; width: 100%; margin: 0 auto;
  padding: 18px 16px 40px;
}
.screen { display: none; animation: fade-up .45s var(--ease); }
.screen.is-active { display: block; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.eyebrow {
  font-size: 11px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent-2); font-weight: 700; margin-bottom: 8px;
}
.title { font-size: 30px; line-height: 1.1; font-weight: 700; letter-spacing: -.5px; }
.subtitle { margin-top: 12px; color: var(--muted); font-size: 14px; line-height: 1.55; max-width: 46ch; }
.screen-head { margin-bottom: 26px; }

/* ---------- Home dashboard: AI operating system ---------- */
body:has(#screen-home.is-active) {
  background:
    radial-gradient(900px 560px at 82% 9%, rgba(0,210,255,.22), transparent 64%),
    radial-gradient(780px 540px at 10% 18%, rgba(112,86,255,.2), transparent 66%),
    radial-gradient(640px 460px at 52% 96%, rgba(255,69,218,.14), transparent 62%),
    linear-gradient(180deg, #030712 0%, #081021 52%, #040711 100%);
}
body:has(#screen-home.is-active) .topbar,
body:has(#screen-home.is-active) .exp-rail,
body:has(#screen-home.is-active) .stage {
  max-width: 1120px;
}
#screen-home {
  position: relative;
  overflow: hidden;
  min-height: calc(100dvh - 112px);
  padding: 18px;
  border: 1px solid rgba(41,211,194,.14);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(5,11,24,.92), rgba(7,9,20,.62)),
    radial-gradient(circle at 84% 18%, rgba(0,210,255,.18), transparent 34%),
    radial-gradient(circle at 15% 18%, rgba(124,92,255,.18), transparent 32%);
  box-shadow: 0 28px 80px -40px rgba(0,0,0,.95), inset 0 1px 0 rgba(255,255,255,.06);
}
#screen-home::before,
#screen-home::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}
#screen-home::before {
  background-image:
    radial-gradient(circle, rgba(119,246,255,.36) 0 1px, transparent 1.5px),
    radial-gradient(circle, rgba(185,153,255,.22) 0 1px, transparent 1.6px),
    linear-gradient(rgba(41,211,194,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,92,255,.05) 1px, transparent 1px),
    linear-gradient(135deg, transparent 0 47%, rgba(119,246,255,.09) 48% 49%, transparent 50% 100%);
  background-size: 96px 96px, 148px 148px, 34px 34px, 34px 34px, 180px 180px;
  mask-image: radial-gradient(80% 80% at 50% 20%, #000 0 38%, transparent 82%);
  animation: hud-drift 22s linear infinite;
  opacity: .78;
}
#screen-home::after {
  background: linear-gradient(180deg, transparent 0 48%, rgba(41,211,194,.07) 49%, transparent 50% 100%);
  background-size: 100% 9px;
  mix-blend-mode: screen;
  opacity: .32;
}
.dashboard-shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.dashboard-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, .72fr);
  align-items: center;
  gap: 20px;
  min-height: 286px;
  padding: 20px 24px;
  border: 1px solid rgba(119,246,255,.24);
  border-radius: 26px;
  background:
    linear-gradient(135deg, rgba(13,24,48,.82), rgba(6,10,23,.48)),
    radial-gradient(circle at 77% 48%, rgba(0,210,255,.18), transparent 38%),
    radial-gradient(circle at 92% 14%, rgba(255,69,218,.12), transparent 34%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 30px 84px -52px rgba(0,210,255,.75);
  backdrop-filter: blur(10px);
}
.dashboard-head { margin: 0; }
#screen-home .dashboard-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  margin-bottom: 4px;
  border-radius: 999px;
  border: 1px solid rgba(119,246,255,.22);
  background: rgba(119,246,255,.06);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}
.dashboard-tagline {
  margin-top: 12px;
  color: #dffcff;
}
#screen-home .title {
  font-size: clamp(36px, 6vw, 60px);
  letter-spacing: 0;
  max-width: 9ch;
  background: linear-gradient(110deg, #f4fbff 0%, #77f6ff 46%, #b999ff 78%, #ff72d6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 34px rgba(41,211,194,.15);
}
#screen-home .subtitle {
  max-width: 54ch;
  color: #9fafc8;
}
.kiwi-companion {
  position: relative;
  justify-self: center;
  width: min(280px, 66vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}
.kiwi-companion::before {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  border: 1px solid rgba(119,246,255,.22);
  background: radial-gradient(circle, rgba(119,246,255,.14) 0 34%, transparent 72%);
  animation: kiwi-halo 5.6s ease-in-out infinite;
  pointer-events: none;
}
.mascot-base {
  position: absolute;
  pointer-events: none;
}
.kiwi-svg {
  position: relative;
  z-index: 1;
  width: 78%;
  overflow: visible;
  animation: kiwi-idle 5.6s ease-in-out infinite;
  filter:
    drop-shadow(0 0 14px var(--kiwi-glow))
    drop-shadow(0 10px 18px rgba(0,0,0,.28));
}
.kiwi-shadow {
  fill: rgba(0,210,255,.18);
}
.kiwi-body {
  fill: url(#kiwiBodyGlow);
  stroke: rgba(119,246,255,.58);
  stroke-width: 2;
}
.kiwi-belly-light {
  fill: rgba(216,255,247,.16);
}
.kiwi-wing {
  fill: url(#kiwiWingFill);
  stroke: rgba(119,246,255,.22);
  stroke-width: 2;
}
.kiwi-face {
  fill: rgba(228,255,242,.84);
  stroke: rgba(119,246,255,.24);
  stroke-width: 1.5;
}
.kiwi-crest {
  fill: #6ff5d8;
  stroke: rgba(210,255,249,.45);
  stroke-width: 1.2;
}
.kiwi-headset {
  fill: none;
  stroke: rgba(185,153,255,.72);
  stroke-width: 5;
  stroke-linecap: round;
}
.kiwi-ear {
  fill: rgba(124,92,255,.28);
  stroke: rgba(185,153,255,.62);
  stroke-width: 2;
}
.kiwi-visor {
  fill: rgba(6,20,36,.76);
  stroke: url(#kiwiVisorGlow);
  stroke-width: 2;
}
.kiwi-visor-line {
  fill: none;
  stroke: rgba(119,246,255,.5);
  stroke-width: 1.5;
  stroke-linecap: round;
  animation: kiwi-blink 3.4s ease-in-out infinite;
}
.kiwi-eye {
  fill: #f7ffff;
}
.kiwi-cheek {
  fill: rgba(255,114,180,.16);
}
.kiwi-beak {
  fill: var(--kiwi-beak);
  stroke: rgba(255,255,255,.3);
  stroke-width: 1;
}
.kiwi-smile {
  fill: none;
  stroke: rgba(12,31,36,.82);
  stroke-width: 4;
  stroke-linecap: round;
}
.kiwi-seed {
  fill: rgba(94,62,38,.55);
}
.kiwi-foot {
  fill: none;
  stroke: var(--kiwi-beak);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.kiwi-core-dot {
  fill: var(--kiwi-core);
}
.kiwi-core-ring {
  fill: none;
  stroke: rgba(119,246,255,.7);
  stroke-width: 2;
}
.kiwi-brand-mark {
  fill: rgba(255,255,255,.72);
  stroke: rgba(119,246,255,.35);
  stroke-width: 0.8;
}
.mascot-base {
  width: 58%;
  height: 15%;
  bottom: 8%;
  left: 21%;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(119,246,255,.34), rgba(124,92,255,.14) 48%, transparent 74%);
  filter: blur(6px);
  transform: perspective(260px) rotateX(62deg);
}
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.dashboard-card {
  position: relative;
  isolation: isolate;
  font-family: inherit;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 22px;
  width: 100%;
  min-height: 292px;
  text-align: left;
  padding: 24px;
  overflow: hidden;
  border: 1px solid rgba(119,246,255,.32);
  border-radius: 24px;
  background:
    linear-gradient(145deg, rgba(16,24,44,.86), rgba(9,12,25,.64)),
    radial-gradient(circle at 82% 12%, rgba(41,211,194,.2), transparent 44%),
    linear-gradient(90deg, rgba(119,246,255,.22) 0 1px, transparent 1px calc(100% - 1px), rgba(119,246,255,.16) calc(100% - 1px)),
    linear-gradient(0deg, rgba(119,246,255,.18) 0 1px, transparent 1px calc(100% - 1px), rgba(119,246,255,.16) calc(100% - 1px));
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 28px 76px -48px rgba(0,0,0,.96);
  backdrop-filter: blur(10px);
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease), opacity .22s var(--ease);
}
.dashboard-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(120deg, transparent 0 22%, rgba(255,255,255,.08) 42%, transparent 60%),
    radial-gradient(circle at 20% 85%, rgba(124,92,255,.14), transparent 42%);
  transform: translateX(-42%);
  opacity: .64;
  transition: transform .35s var(--ease), opacity .22s var(--ease);
}
.dashboard-card::after {
  content: "";
  position: absolute;
  inset: 14px;
  background:
    linear-gradient(90deg, #77f6ff 0 24px, transparent 24px calc(100% - 24px), #77f6ff calc(100% - 24px)) top / 100% 1px no-repeat,
    linear-gradient(90deg, #77f6ff 0 24px, transparent 24px calc(100% - 24px), #ff72d6 calc(100% - 24px)) bottom / 100% 1px no-repeat,
    linear-gradient(180deg, #77f6ff 0 24px, transparent 24px calc(100% - 24px), #77f6ff calc(100% - 24px)) left / 1px 100% no-repeat,
    linear-gradient(180deg, #b999ff 0 24px, transparent 24px calc(100% - 24px), #ff72d6 calc(100% - 24px)) right / 1px 100% no-repeat;
  opacity: .42;
  pointer-events: none;
}
.dashboard-card.is-open { cursor: pointer; }
.dashboard-card.is-open:hover {
  transform: translateY(-8px);
  border-color: rgba(119,246,255,.74);
  box-shadow: 0 34px 88px -48px rgba(41,211,194,.95), inset 0 1px 0 rgba(255,255,255,.1);
}
.dashboard-card.is-open:hover::before { transform: translateX(18%); opacity: .9; }
.dashboard-card.is-open:active { transform: translateY(-2px) scale(.99); }
.dashboard-card.is-locked { opacity: .56; cursor: not-allowed; }
.card-ai { border-color: rgba(185,153,255,.24); }
.card-tools { border-color: rgba(119,246,255,.24); }
.card-games { border-color: rgba(255,114,214,.22); }
.card-progress { border-color: rgba(94,255,176,.22); }
.dashboard-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  border-radius: 22px;
  background:
    radial-gradient(circle at 30% 25%, rgba(255,255,255,.32), transparent 38%),
    linear-gradient(135deg, rgba(41,211,194,.22), rgba(124,92,255,.18));
  border: 1px solid rgba(119,246,255,.32);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14), 0 0 36px rgba(41,211,194,.26);
  flex: 0 0 auto;
}
.dashboard-icon::before,
.dashboard-icon::after {
  content: "";
  position: absolute;
}
.lang-icon::before {
  width: 36px;
  height: 26px;
  border: 2px solid #77f6ff;
  border-radius: 4px;
  box-shadow: 0 0 12px rgba(119,246,255,.42);
}
.lang-icon::after {
  width: 2px;
  height: 32px;
  background: #77f6ff;
  box-shadow: 0 0 10px rgba(119,246,255,.5);
}
.ai-icon::before {
  width: 40px;
  height: 40px;
  border: 2px solid #b999ff;
  border-radius: 50%;
}
.ai-icon::after {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #b999ff;
  box-shadow: 0 -18px 0 -2px #77f6ff, 16px 8px 0 -2px #ff72d6, -16px 8px 0 -2px #77f6ff;
}
.prompt-icon::before {
  width: 38px;
  height: 28px;
  border: 2px solid #77f6ff;
  border-radius: 8px;
}
.prompt-icon::after {
  width: 18px;
  height: 2px;
  background: #b999ff;
  box-shadow: 0 8px 0 #77f6ff, 0 16px 0 rgba(255,114,214,.9);
}
.tools-icon::before {
  width: 38px;
  height: 32px;
  border: 2px solid #77f6ff;
  border-radius: 10px;
  box-shadow: 0 0 12px rgba(119,246,255,.34);
}
.tools-icon::after {
  width: 26px;
  height: 2px;
  background: #b999ff;
  box-shadow: 0 8px 0 #77f6ff, 0 16px 0 rgba(255,114,214,.9);
}
.game-icon::before {
  width: 41px;
  height: 28px;
  border: 2px solid #ff72d6;
  border-radius: 9px;
}
.game-icon::after {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #ff72d6;
  box-shadow: -12px 0 0 #77f6ff, 12px 0 0 #b999ff;
}
.progress-icon::before {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: conic-gradient(#5effb0 0 66%, rgba(94,255,176,.14) 66% 100%);
  box-shadow: 0 0 18px rgba(94,255,176,.28);
}
.progress-icon::after {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #10182c;
}
.dashboard-copy {
  display: flex;
  flex-direction: column;
  gap: 9px;
  min-width: 0;
}
.dashboard-title {
  font-size: 21px;
  font-weight: 760;
  line-height: 1.12;
}
.dashboard-text {
  color: #9fafc8;
  font-size: 14px;
  line-height: 1.5;
}
.dashboard-cta {
  margin-top: auto;
  padding: 10px 14px;
  border-radius: 999px;
  color: #05111f;
  background: linear-gradient(90deg, #77f6ff, #b999ff);
  border: 1px solid rgba(255,255,255,.18);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
  box-shadow: 0 0 22px rgba(41,211,194,.22);
}
.dashboard-card.is-locked .dashboard-cta {
  color: #8e9bb5;
  background: rgba(255,255,255,.04);
}
.placeholder-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 18px;
  justify-items: start;
  min-height: 260px;
  padding: 28px;
  border: 1px solid rgba(119,246,255,.22);
  border-radius: 24px;
  background:
    linear-gradient(145deg, rgba(15,23,42,.72), rgba(7,10,20,.56)),
    radial-gradient(circle at 88% 12%, rgba(124,92,255,.16), transparent 42%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 24px 72px -48px rgba(0,210,255,.65);
  backdrop-filter: blur(14px);
}
.placeholder-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(119,246,255,.08), transparent 34% 72%, rgba(255,114,214,.06));
}
.placeholder-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  border-radius: 22px;
  background:
    radial-gradient(circle at 30% 25%, rgba(255,255,255,.32), transparent 38%),
    linear-gradient(135deg, rgba(41,211,194,.22), rgba(124,92,255,.18));
  border: 1px solid rgba(119,246,255,.32);
  box-shadow: 0 0 30px rgba(41,211,194,.2);
}
.learn-progress {
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 800;
  margin: -12px 0 18px;
  text-transform: uppercase;
}
.learn-card-grid,
.game-grid,
.tool-grid,
.progress-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.learn-card,
.tool-card,
.game-card,
.progress-tile,
.interactive-panel,
.lesson-detail,
.example-block,
.challenge-block,
.lesson-section {
  border: 1px solid rgba(119,246,255,.2);
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(15,23,42,.68), rgba(7,10,20,.5)),
    radial-gradient(circle at 88% 12%, rgba(124,92,255,.12), transparent 42%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
.tool-disclaimer {
  color: #9fafc8;
  font-size: 13px;
  line-height: 1.5;
  margin: -8px 0 18px;
}
.learn-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 280px;
  padding: 20px;
  color: var(--text);
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  transition: transform .2s var(--ease), border-color .2s, box-shadow .2s;
}
.mission-order {
  color: var(--accent-2);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 1.5px;
}
.learn-card-top {
  min-height: 52px;
}
.learn-card-desc {
  flex: 1;
  min-height: 72px;
  line-height: 1.5;
}
.tool-card {
  display: grid;
  grid-template-rows: 1fr auto auto;
  gap: 14px;
  min-height: 260px;
  padding: 18px;
}
.tool-card.is-active {
  border-color: rgba(119,246,255,.58);
  box-shadow: 0 20px 54px -42px rgba(41,211,194,.82), inset 0 1px 0 rgba(255,255,255,.08);
}
.tool-card-head {
  display: grid;
  gap: 12px;
}
.tool-card h2 {
  margin-bottom: 8px;
  font-size: 20px;
}
.tool-card p,
.tool-detail-list li,
.tool-caution,
.tool-reviewed {
  color: #9fafc8;
  font-size: 14px;
  line-height: 1.55;
}
.tool-score {
  display: inline-flex;
  width: max-content;
  min-height: 28px;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  color: #05111f;
  background: linear-gradient(90deg, #77f6ff, #b999ff);
  font-size: 11px;
  font-weight: 900;
}
.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
body:has(#screen-ai-tools.is-active) .stage,
body:has(#screen-ai-guides.is-active) .stage,
body:has(#screen-ai-guide-detail.is-active) .stage,
body:has(#screen-ai-games.is-active) .stage,
body:has(#screen-prompt-battle.is-active) .stage,
body:has(#screen-portal-snake.is-active) .stage,
body:has(#screen-connect-four.is-active) .stage,
body:has(#screen-kiwippy-runner.is-active) .stage {
  max-width: 1140px;
}
body:has(#screen-ai-tools.is-active) .hub-subtitle,
body:has(#screen-ai-guides.is-active) .hub-subtitle,
body:has(#screen-ai-guide-detail.is-active) .hub-subtitle,
body:has(#screen-ai-guide-detail.is-active) .lesson-detail > .subtitle,
body:has(#screen-ai-games.is-active) .hub-subtitle {
  max-width: 72ch;
}
body:has(#screen-ai-games.is-active) .game-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  width: 100%;
}
#prompt-battle-panel,
#portal-snake-panel,
#connect-four-panel,
#kiwippy-runner-panel {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  box-sizing: border-box;
}
body:has(#screen-ai-games.is-active) .game-card {
  min-height: 228px;
  padding: 20px;
}
.learn-card-grid {
  gap: 16px;
  width: 100%;
}
.tool-detail-panel:not(:empty) {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  box-sizing: border-box;
}
.tool-detail {
  scroll-margin-top: 24px;
  margin-top: 20px;
  display: grid;
  gap: 28px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 28px 32px;
  border: 1px solid rgba(119,246,255,.24);
  border-radius: 22px;
  background:
    linear-gradient(145deg, rgba(15,23,42,.76), rgba(7,10,20,.58)),
    radial-gradient(circle at 88% 10%, rgba(41,211,194,.12), transparent 44%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}
.tool-detail-panel:empty {
  display: none;
}
.tool-detail-top {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}
.tool-detail-overview {
  display: grid;
  gap: 16px;
  min-width: 0;
}
.tool-detail-overview h2 {
  margin: 4px 0 8px;
  font-size: 26px;
}
.tool-detail-section {
  min-width: 0;
}
.tool-detail-ratings,
.tool-detail-use-cases,
.tool-comparison-section {
  width: 100%;
}
.tool-detail-footer {
  display: grid;
  gap: 12px;
}
.tool-rating-grid {
  display: grid;
  gap: 12px;
}
.tool-rating-row {
  display: grid;
  grid-template-columns: minmax(120px, 180px) 1fr auto;
  align-items: center;
  column-gap: 16px;
  row-gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,.04);
  color: #dce8ff;
  font-size: 13px;
}
.tool-rating-row b {
  color: #8fa2c0;
}
.tool-rating-meter {
  display: block;
  height: 7px;
  min-width: 0;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(119,246,255,.1);
  border: 1px solid rgba(119,246,255,.14);
}
.tool-rating-meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #77f6ff, #b999ff);
}
.tool-rating-value {
  color: #f2fbff;
  font-weight: 900;
  text-align: right;
  white-space: nowrap;
}
.tool-detail-list {
  min-width: 0;
  padding: 18px;
  border-radius: 16px;
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(119,246,255,.12);
}
.tool-detail-list ul {
  display: grid;
  gap: 6px;
  margin-top: 8px;
  padding-left: 18px;
}
.tool-comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.tool-comparison-block {
  min-width: 0;
  padding: 16px;
  border-radius: 16px;
  background:
    linear-gradient(145deg, rgba(119,246,255,.06), rgba(124,92,255,.045)),
    rgba(255,255,255,.025);
  border: 1px solid rgba(119,246,255,.14);
}
.tool-comparison-block b {
  color: #dffcff;
  font-size: 13px;
}
.tool-comparison-block ul {
  display: grid;
  gap: 8px;
  margin-top: 10px;
  padding-left: 18px;
}
.tool-comparison-block li {
  color: #9fafc8;
  font-size: 14px;
  line-height: 1.55;
}
.tool-caution {
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,206,92,.2);
  background: rgba(255,206,92,.06);
}
.tool-reviewed {
  color: var(--faint);
  font-size: 12px;
}
.tool-use-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tool-use-chip-list span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 10px;
  border-radius: 999px;
  color: #dce8ff;
  background: rgba(119,246,255,.07);
  border: 1px solid rgba(119,246,255,.16);
  font-size: 12px;
  font-weight: 800;
}
.learn-card:hover {
  transform: translateY(-2px);
  border-color: rgba(119,246,255,.55);
  box-shadow: 0 20px 54px -42px rgba(41,211,194,.72);
}
.learn-card.is-complete {
  border-color: color-mix(in srgb, var(--success) 45%, var(--border));
}
.learn-card-top,
.lesson-detail-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.learn-badge,
.learn-time {
  display: inline-flex;
  align-items: center;
  width: max-content;
  min-height: 24px;
  padding: 4px 9px;
  border-radius: 999px;
  color: #05111f;
  background: linear-gradient(90deg, #77f6ff, #b999ff);
  font-size: 10px;
  font-weight: 900;
}
.learn-badge.is-soft,
.learn-time {
  color: var(--accent-2);
  background: rgba(119,246,255,.08);
  border: 1px solid rgba(119,246,255,.18);
}
.learn-card-title {
  font-size: 20px;
  font-weight: 800;
  line-height: 1.25;
}
.learn-card-desc,
.learn-card-status,
.game-card p,
.lesson-section p,
.example-block p,
.challenge-block p {
  color: #9fafc8;
  font-size: 14px;
  line-height: 1.55;
}
.learn-card-status {
  margin-top: auto;
  color: var(--accent-2);
  font-weight: 800;
}
.lesson-detail {
  display: grid;
  gap: 20px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 28px 32px;
}
.lesson-section-list {
  display: grid;
  gap: 14px;
}
.lesson-section,
.example-block,
.challenge-block,
.interactive-panel,
.game-card,
.progress-tile {
  padding: 18px;
}
.prompt-exercise-stack {
  display: grid;
  gap: 14px;
}
.lesson-section h2,
.example-block h2,
.challenge-block h2,
.interactive-panel h2,
.game-card h2 {
  margin-bottom: 8px;
  font-size: 18px;
}
.prompt-compare,
.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 12px 0;
}
.prompt-compare div,
.choice-card {
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
  background: rgba(255,255,255,.035);
  padding: 14px;
}
.choice-card {
  color: var(--text);
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform .18s var(--ease), border-color .18s, background .18s;
}
.choice-card:hover {
  transform: translateY(-2px);
  border-color: rgba(119,246,255,.42);
}
.choice-card span {
  display: block;
  margin-top: 8px;
  color: #dce8ff;
  line-height: 1.5;
}
.choice-card.is-correct {
  border-color: color-mix(in srgb, var(--success) 55%, var(--border));
  background: color-mix(in srgb, var(--success) 10%, transparent);
}
.choice-card.is-wrong {
  border-color: color-mix(in srgb, var(--danger) 55%, var(--border));
  background: color-mix(in srgb, var(--danger) 10%, transparent);
}
.feedback-line {
  min-height: 1.4em;
  color: var(--muted);
  font-weight: 700;
}
.feedback-line.ok { color: var(--success); }
.feedback-line.err { color: var(--danger); }
.game-card {
  display: grid;
  gap: 10px;
}
.game-card.is-soon {
  opacity: .62;
}
.game-best-score {
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 800;
}
.game-play-btn {
  width: fit-content;
  margin-top: 4px;
}
.prompt-battle-panel {
  display: grid;
  gap: 22px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 28px 32px;
}
.prompt-battle-hud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.prompt-battle-stat {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 12px;
  border-radius: 999px;
  color: #dce8ff;
  background: rgba(119,246,255,.08);
  border: 1px solid rgba(119,246,255,.18);
  font-size: 12px;
  font-weight: 800;
}
.prompt-battle-scenario {
  padding: 20px 22px;
  border-radius: 16px;
  border: 1px solid rgba(119,246,255,.16);
  background: rgba(255,255,255,.03);
}
.prompt-battle-scenario b {
  display: block;
  margin-bottom: 8px;
  color: #77f6ff;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.prompt-battle-scenario p {
  color: #dce8ff;
  line-height: 1.55;
  margin-bottom: 12px;
}
.prompt-battle-focus {
  width: fit-content;
}
.prompt-battle-choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.prompt-battle-choice {
  min-height: 148px;
  padding: 18px;
}
.prompt-battle-choice span {
  line-height: 1.55;
}
.prompt-battle-choice.is-muted {
  opacity: .55;
}
.prompt-battle-hint {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.prompt-battle-feedback {
  display: grid;
  gap: 14px;
  padding: 20px 22px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.03);
  color: #dce8ff;
  line-height: 1.55;
}
.prompt-battle-feedback.is-correct {
  border-color: color-mix(in srgb, var(--success) 45%, var(--border));
  background: color-mix(in srgb, var(--success) 8%, transparent);
}
.prompt-battle-feedback.is-wrong {
  border-color: color-mix(in srgb, var(--danger) 45%, var(--border));
  background: color-mix(in srgb, var(--danger) 8%, transparent);
}
.prompt-battle-result {
  color: #f2fbff;
  font-size: 16px;
  font-weight: 800;
}
.prompt-battle-learned {
  color: #9fafc8;
  font-size: 13px;
}
.prompt-battle-learned b {
  color: #77f6ff;
}
.prompt-battle-why-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.prompt-battle-why-card {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(119,246,255,.12);
  background: rgba(255,255,255,.03);
}
.prompt-battle-why-card b {
  display: block;
  margin-bottom: 6px;
  color: #f2fbff;
  font-size: 12px;
}
.prompt-battle-why-card p {
  color: #9fafc8;
  font-size: 13px;
  line-height: 1.5;
}
.prompt-battle-checklist {
  display: grid;
  gap: 8px;
}
.prompt-battle-checklist-label {
  color: #8fa2c0;
  font-size: 11px;
  text-transform: uppercase;
}
.prompt-battle-checklist-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.prompt-battle-next {
  width: fit-content;
}
.prompt-battle-end h2 {
  margin-bottom: 4px;
  font-size: 24px;
}
.prompt-battle-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.prompt-battle-summary-stat {
  display: grid;
  gap: 6px;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(119,246,255,.14);
  background: rgba(255,255,255,.03);
}
.prompt-battle-summary-stat b {
  color: #8fa2c0;
  font-size: 11px;
  text-transform: uppercase;
}
.prompt-battle-summary-stat strong {
  color: #f2fbff;
  font-size: 28px;
}
.prompt-battle-end-message {
  color: #9fafc8;
  line-height: 1.55;
}
.prompt-battle-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.mini-game-panel {
  display: grid;
  gap: 18px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 28px 32px;
}
.mini-game-hud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.mini-game-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.snake-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.snake-start-btn {
  width: auto;
  min-width: 108px;
}
.snake-board {
  display: grid;
  grid-template-columns: repeat(var(--snake-cols, 14), minmax(0, 1fr));
  gap: 2px;
  width: min(100%, 560px);
  margin: 0 auto;
  padding: 10px;
  border-radius: 16px;
  border: 1px solid rgba(119,246,255,.22);
  background: rgba(4, 10, 22, .88);
  box-shadow: inset 0 0 24px rgba(41,211,194,.08);
}
.snake-cell {
  position: relative;
  aspect-ratio: 1;
  border-radius: 4px;
  background: rgba(255,255,255,.03);
  overflow: visible;
}
.snake-cell.snake-head {
  background: #77f6ff;
  box-shadow: 0 0 10px rgba(119,246,255,.55);
  z-index: 2;
}
.snake-cell.snake-body {
  background: rgba(119,246,255,.45);
  z-index: 2;
}
.snake-cell.snake-food {
  background: #ff9b45;
  box-shadow: 0 0 10px rgba(255,155,69,.55);
  z-index: 2;
}
.snake-cell.snake-portal-a,
.snake-cell.snake-portal-b {
  background: rgba(255,255,255,.02);
  z-index: 1;
}
.snake-portal-gem {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 168%;
  height: 118%;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  pointer-events: none;
}
.snake-portal-gem.is-a {
  background: radial-gradient(circle at 40% 35%, rgba(119,246,255,.45), rgba(41,211,194,.12) 68%);
  border: 2px solid rgba(119,246,255,.85);
  box-shadow: 0 0 16px rgba(119,246,255,.45);
  transform: translate(-50%, -50%) rotate(45deg);
  border-radius: 38%;
}
.snake-portal-gem.is-b {
  background: radial-gradient(circle at 40% 35%, rgba(185,153,255,.5), rgba(124,92,255,.14) 68%);
  border: 2px solid rgba(185,153,255,.85);
  box-shadow: 0 0 16px rgba(185,153,255,.42);
  transform: translate(-50%, -50%) rotate(45deg);
  border-radius: 38%;
}
.snake-dpad {
  display: grid;
  grid-template-columns: repeat(3, 57px);
  grid-template-rows: repeat(2, 57px);
  gap: 8px;
  justify-content: center;
  margin: 0 auto;
}
.snake-pad-up { grid-column: 2; grid-row: 1; }
.snake-pad-left { grid-column: 1; grid-row: 2; }
.snake-pad-down { grid-column: 2; grid-row: 2; }
.snake-pad-right { grid-column: 3; grid-row: 2; }
.snake-dir-btn {
  min-height: 57px;
  min-width: 57px;
  border-radius: 14px;
  border: 1px solid rgba(119,246,255,.24);
  background: rgba(255,255,255,.04);
  color: #f2fbff;
  font-size: 25px;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
}
.snake-dir-btn:hover {
  border-color: rgba(119,246,255,.5);
  background: rgba(119,246,255,.08);
}
.snake-dir-btn:active {
  transform: scale(0.96);
}
.snake-help,
.cf-help {
  color: #9fafc8;
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
}
.snake-status {
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}
.snake-status.is-over {
  color: #ffb4b4;
}
.cf-board {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  width: min(100%, 560px);
  margin: 0 auto;
  padding: 12px;
  border-radius: 18px;
  border: 1px solid rgba(119,246,255,.22);
  background: rgba(4, 10, 22, .88);
}
.cf-column {
  display: grid;
  grid-template-rows: repeat(6, minmax(0, 1fr));
  gap: 6px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.cf-column:disabled {
  cursor: default;
  opacity: .75;
}
.cf-chip {
  display: block;
  aspect-ratio: 1;
  border-radius: 999px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
}
.cf-chip.is-player {
  background: linear-gradient(180deg, #77f6ff, #3b82f6);
  border-color: rgba(119,246,255,.55);
  box-shadow: 0 0 10px rgba(59,130,246,.35);
}
.cf-chip.is-ai {
  background: linear-gradient(180deg, #ffb347, #b999ff);
  border-color: rgba(255,179,71,.45);
  box-shadow: 0 0 10px rgba(185,153,255,.28);
}
.cf-chip.is-win {
  outline: 2px solid #f2fbff;
  outline-offset: 1px;
}
.runner-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.runner-play-btn {
  width: min(100%, 320px);
  margin: 0 auto;
  min-height: 48px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.runner-stage-wrap {
  position: relative;
  width: min(100%, 640px);
  margin: 0 auto;
}
.runner-canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(119,246,255,.24);
  background: #060b18;
  touch-action: manipulation;
  cursor: pointer;
}
.runner-jump-btn {
  display: none;
}
.runner-lane-controls {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}
.runner-lane-btn {
  min-height: 57px;
  border-radius: 14px;
  border: 1px solid rgba(119,246,255,.28);
  background: rgba(119,246,255,.08);
  color: #f2fbff;
  font-size: 27px;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
}
.runner-lane-btn:active {
  background: rgba(119,246,255,.18);
}
.runner-help,
.runner-status {
  color: #9fafc8;
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
}
.runner-status.is-over {
  color: #ffb4b4;
  font-weight: 800;
}
.runner-over-panel {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgba(255,155,69,.22);
  background: linear-gradient(180deg, rgba(255,155,69,.08), rgba(255,80,80,.04));
  text-align: center;
}
.runner-over-scores {
  color: #9fafc8;
  font-size: 14px;
  margin: 0;
}
.runner-over-scores strong {
  color: #77f6ff;
}
.runner-over-title {
  color: #f2fbff;
  font-size: 16px;
  font-weight: 800;
}
.choice-card.is-selected {
  border-color: rgba(119,246,255,.55);
}
.choice-card:disabled {
  cursor: default;
  transform: none;
}
.choice-card:disabled:hover {
  transform: none;
}
@media (max-width: 620px) {
  .prompt-battle-choices,
  .prompt-battle-summary,
  .prompt-battle-why-grid {
    grid-template-columns: 1fr;
  }
  .mini-game-panel {
    padding: 16px;
    gap: 16px;
  }
  .snake-board,
  .cf-board {
    width: 100%;
  }
  .runner-lane-controls {
    display: grid;
  }
}
.progress-tile {
  display: grid;
  gap: 8px;
}
.progress-tile b {
  color: #8fa2c0;
  font-size: 12px;
}
.progress-tile strong {
  color: #f2fbff;
  font-size: 28px;
}
.dashboard-panels {
  display: grid;
  grid-template-columns: 1.15fr .9fr .95fr;
  gap: 12px;
}
.hud-panel {
  position: relative;
  overflow: hidden;
  min-height: 112px;
  padding: 13px 14px;
  border: 1px solid rgba(119,246,255,.18);
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(15,23,42,.68), rgba(7,10,20,.5)),
    radial-gradient(circle at 88% 12%, rgba(124,92,255,.12), transparent 42%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
  backdrop-filter: blur(16px);
}
.hud-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(119,246,255,.08), transparent 28% 72%, rgba(255,114,214,.05));
  pointer-events: none;
}
.panel-kicker {
  position: relative;
  z-index: 1;
  color: #77f6ff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  margin-bottom: 9px;
}
.hud-stat-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}
.hud-stat-grid span {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px 9px;
  border-radius: 12px;
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.06);
}
.hud-stat-grid b,
.reward-readout b {
  color: #8fa2c0;
  font-size: 11px;
  font-weight: 700;
}
.hud-stat-grid strong,
.reward-readout strong {
  color: #f2fbff;
  font-size: 16px;
  line-height: 1.1;
}
.reward-readout {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 10px;
  align-items: center;
}
.reward-readout div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.reward-readout small,
.mission-tip {
  color: #9fafc8;
  font-size: 12px;
  line-height: 1.55;
}
.reward-orb {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 24%, #fff7c7, transparent 23%),
    radial-gradient(circle, #ffce5c, #f08b3c 72%);
  box-shadow: 0 0 30px rgba(255,206,92,.28);
  flex: 0 0 auto;
}
.mission-tip {
  position: relative;
  z-index: 1;
  color: #d5e4ff;
}
@keyframes hud-drift {
  from { background-position: 0 0, 0 0, 0 0, 0 0, 0 0; }
  to { background-position: 96px 96px, -148px 148px, 34px 34px, -34px 34px, 180px 180px; }
}
@keyframes kiwi-idle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes kiwi-halo {
  0%, 100% { transform: scale(1); opacity: .82; }
  50% { transform: scale(1.04); opacity: 1; }
}
@keyframes kiwi-blink {
  0%, 100% { opacity: .45; }
  45%, 55% { opacity: 1; }
}

/* ---------- Welcome / landing ---------- */
.welcome {
  min-height: 78dvh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  padding: 20px 6px;
}
.hero-mark {
  display: grid; place-items: center;
  width: 92px; height: 92px; border-radius: 28px;
  font-size: 48px; font-weight: 700; color: #fff;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow), var(--glow);
  margin-bottom: 22px;
  animation: float 5s ease-in-out infinite;
}
.hero-kiwi-mark {
  overflow: hidden;
  background:
    radial-gradient(circle at 35% 20%, rgba(255,255,255,.32), transparent 22%),
    linear-gradient(145deg, rgba(41,211,194,.95), rgba(124,92,255,.82));
}
.hero-ky-mark {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 28% 20%, rgba(255,255,255,.3), transparent 24%),
    linear-gradient(145deg, rgba(119,246,255,.92), rgba(124,92,255,.9));
}
.hero-ky-mark::before,
.hero-ky-mark::after {
  content: "";
  position: absolute;
  height: 1px;
  background: rgba(255,255,255,.32);
  transform: rotate(-27deg);
}
.hero-ky-mark::before { width: 78px; top: 22px; left: -12px; }
.hero-ky-mark::after { width: 62px; bottom: 24px; right: -14px; }
.hero-ky-mark .ky-monogram {
  font-size: 39px;
  letter-spacing: 0;
  text-shadow: 0 0 18px rgba(119,246,255,.74);
}
.hero-mark .kiwi-brand-body {
  width: 48px;
  height: 59px;
  border-width: 2px;
}
.hero-mark .kiwi-brand-body::before {
  width: 29px;
  height: 13px;
  left: 8px;
  top: 15px;
  box-shadow: 0 0 14px rgba(119,246,255,.46);
}
.hero-mark .kiwi-brand-body::after {
  width: 8px;
  height: 8px;
  left: 20px;
  top: 35px;
}
.hero-mark .kiwi-brand-visor {
  width: 14px;
  height: 4px;
  left: 17px;
  top: 20px;
}
.hero-mark .kiwi-brand-beak {
  left: 20px;
  top: 29px;
  border-left-width: 5px;
  border-right-width: 5px;
  border-top-width: 9px;
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.hero-title {
  font-size: clamp(54px, 18vw, 86px); line-height: .95; font-weight: 800; letter-spacing: -2px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-subtitle { margin-top: 14px; font-size: 18px; font-weight: 600; color: var(--text); }
.hero-text {
  margin-top: 16px; max-width: 42ch; color: var(--muted);
  font-size: 14.5px; line-height: 1.65;
}
.welcome-actions { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 340px; margin-top: var(--space-section); }
.oauth-btn[hidden] { display: none !important; }
.oauth-btn {
  position: relative;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-family: inherit; font-size: 15px; font-weight: 600;
  padding: 15px; border-radius: 14px; cursor: not-allowed;
  background: var(--panel); color: var(--muted);
  border: 1px solid var(--border);
  opacity: .8;
}
.oauth-btn.is-enabled {
  cursor: pointer; opacity: 1; color: var(--text);
  background: var(--panel-soft);
}
.oauth-btn.is-enabled:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: var(--shadow);
}
.welcome-user[hidden] { display: none !important; }
.welcome-user {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 14px; border-radius: 14px;
  border: 1px solid var(--border); background: var(--panel);
}
.welcome-user .account-avatar { width: 36px; height: 36px; }
.welcome-user .account-name { max-width: none; font-size: 14px; color: var(--text); }
.oauth-g {
  display: grid; place-items: center;
  width: 22px; height: 22px; border-radius: 50%;
  font-weight: 800; font-size: 13px; color: #fff;
  background: conic-gradient(from -45deg, #ea4335, #fbbc05, #34a853, #4285f4, #ea4335);
}
.soon-pill {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  font-size: 9px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase;
  padding: 3px 7px; border-radius: 99px;
  background: var(--panel-soft); color: var(--faint); border: 1px solid var(--border);
}
.welcome-note { margin-top: 20px; font-size: 12px; color: var(--faint); }

/* ---------- Language cards ---------- */
.lang-grid { display: flex; flex-direction: column; gap: 14px; }
.lang-card {
  position: relative;
  display: flex; align-items: center; gap: 16px;
  width: 100%; text-align: left;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--panel), var(--panel-soft));
  color: var(--text); cursor: pointer;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
  font-family: inherit;
}
.lang-card.is-open:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow), var(--glow); }
.lang-card.is-open:active { transform: translateY(0) scale(.99); }
.lang-glyph {
  display: grid; place-items: center;
  width: 54px; height: 54px; border-radius: 16px;
  font-size: 26px; font-weight: 700; flex: 0 0 auto;
  background: radial-gradient(circle at 30% 25%, color-mix(in srgb, var(--accent) 40%, transparent), color-mix(in srgb, var(--accent-2) 14%, transparent));
  border: 1px solid var(--border);
}
.lang-meta { display: flex; flex-direction: column; gap: 3px; flex: 1; }
.lang-name { font-size: 18px; font-weight: 700; }
.lang-sub  { font-size: 12px; color: var(--muted); }
.lang-go   { font-size: 13px; font-weight: 700; color: var(--accent-2); }
.lang-card.is-locked { opacity: .7; cursor: not-allowed; }
/* neutral, premium lock chip (no awkward big letters) */
.lang-lock {
  width: 22px; height: 22px; flex: 0 0 auto; align-self: center;
  border: 2px solid var(--faint); border-radius: 6px; position: relative;
}
.lang-lock::before {
  content: ""; position: absolute; left: 50%; top: -8px; transform: translateX(-50%);
  width: 12px; height: 11px; border: 2px solid var(--faint); border-bottom: none;
  border-radius: 8px 8px 0 0;
}

/* ---------- Style selection ---------- */
.style-grid { display: flex; flex-direction: column; gap: 16px; }
.style-card {
  position: relative; text-align: left;
  display: flex; flex-direction: column; gap: 10px;
  padding: 16px;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(150deg, var(--panel), var(--panel-soft));
  color: var(--text); cursor: pointer; font-family: inherit;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
}
.style-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.style-card.is-selected { border-color: var(--accent); box-shadow: var(--glow); }
.style-preview {
  position: relative; display: block;
  height: 96px; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border);
}
.preview-pro  { background: radial-gradient(120% 120% at 20% 0%, #141826, #0b0d14); }
.preview-kawaii { background: radial-gradient(120% 120% at 20% 0%, #fbeaf4, #efe0f0); }
.preview-cozy { background: radial-gradient(120% 120% at 20% 0%, #f4ebd8, #e7dabf); }
.style-preview .prev-bar {
  position: absolute; top: 12px; left: 12px; right: 12px; height: 12px; border-radius: 6px;
}
.style-preview .prev-card {
  position: absolute; top: 34px; left: 12px; width: 58%; height: 40px; border-radius: 10px;
}
.style-preview .prev-dot {
  position: absolute; right: 16px; bottom: 14px; width: 30px; height: 30px; border-radius: 50%;
}
.preview-pro .prev-bar  { background: linear-gradient(90deg, #7c5cff, #29d3c2); }
.preview-pro .prev-card { background: #161a27; border: 1px solid #262c40; }
.preview-pro .prev-dot  { background: linear-gradient(140deg, #7c5cff, #29d3c2); box-shadow: 0 0 16px -2px #7c5cff; }
.preview-kawaii .prev-bar  { background: linear-gradient(90deg, #ff7fae, #9d8bff); }
.preview-kawaii .prev-card { background: #fff6fb; border: 1px solid #ecd6ea; }
.preview-kawaii .prev-dot  { background: linear-gradient(140deg, #ff7fae, #9d8bff); box-shadow: 0 0 16px -2px #ff7fae; }
.preview-cozy .prev-bar  { background: linear-gradient(90deg, #e08e4a, #d2705a); }
.preview-cozy .prev-card { background: #fbf4e6; border: 1px solid #e2d2b3; }
.preview-cozy .prev-dot  { background: linear-gradient(140deg, #e08e4a, #d2705a); box-shadow: 0 0 16px -2px #e08e4a; }
.style-name { font-size: 18px; font-weight: 700; }
.style-desc { font-size: 13px; color: var(--muted); line-height: 1.5; }
.style-pick {
  position: absolute; top: 14px; right: 14px;
  font-size: 10px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase;
  padding: 4px 9px; border-radius: 99px;
  background: var(--accent); color: var(--on-accent);
  opacity: 0; transform: scale(.8); transition: opacity .2s, transform .2s;
}
.style-card.is-selected .style-pick { opacity: 1; transform: scale(1); }

/* ---------- Roadmap ---------- */
.roadmap-head { display: flex; align-items: center; gap: 12px; margin-bottom: 30px; flex-wrap: wrap; }
.back-btn {
  font-family: inherit; font-size: 13px; color: var(--text);
  background: var(--panel); border: 1px solid var(--border);
  padding: 9px 14px; border-radius: 11px; cursor: pointer;
  transition: border-color .2s, transform .2s;
}
.back-btn:hover { border-color: var(--accent-2); transform: translateX(-2px); }
.roadmap-titles { flex: 1; }
.roadmap-titles .title { font-size: 24px; }
.chip-btn {
  font-family: inherit; font-size: 12px; font-weight: 600; color: var(--accent-2);
  background: var(--panel); border: 1px solid var(--border);
  padding: 9px 13px; border-radius: 99px; cursor: pointer;
  transition: border-color .2s, color .2s;
}
.chip-btn:hover { border-color: var(--accent); }

/* ============================================================
   Grammar roadmap — a zig-zag "study adventure".
   Lessons alternate left / right and connect with a diagonal
   trail; the shape changes every 5 lessons (diamond → square →
   circle → star → triangle) to mark a new learning stage. Review Challenges
   sit centred as larger milestone checkpoints.
   ============================================================ */
.jpath { list-style: none; position: relative; padding: 12px 0 40px; }

.jnode {
  position: relative; width: 50%;
  display: flex; flex-direction: column; align-items: center; gap: 11px;
  margin-bottom: 42px;
}
.jnode[style*="left"]  { margin-right: auto; }
.jnode[style*="right"] { margin-left: auto; }

/* diagonal dashed trail toward the next (opposite-side) lesson */
.jlesson::before {
  content: ""; position: absolute; z-index: -1;
  top: 60px; height: 66px; width: 3px; border-radius: 3px;
  background: repeating-linear-gradient(var(--border) 0 6px, transparent 6px 13px);
  transition: background .35s var(--ease);
}
.jlesson[style*="left"]::before  { right: 28%; transform: rotate(22deg); }
.jlesson[style*="right"]::before { left: 28%;  transform: rotate(-22deg); }
.jnode:last-child.jlesson::before { display: none; }
/* completed trail turns solid + green to show progress */
.jlesson.is-linked::before {
  background: linear-gradient(var(--success), var(--accent-2));
}

/* ---- Lesson node (shape + number, title below) ---- */
.jdot {
  position: relative; display: grid; place-items: center;
  width: 84px; height: 84px;
  border: none; background: none; padding: 0; cursor: pointer;
  font-family: inherit;
  transition: transform .25s var(--ease);
}
.jdot:disabled { cursor: not-allowed; }
.jshape {
  position: absolute; inset: 0;
  background: linear-gradient(150deg, var(--panel), var(--panel-soft, var(--panel)));
  box-shadow: inset 0 0 0 2px var(--border);
  transition: background .3s var(--ease), box-shadow .3s, filter .3s;
}
.jnum {
  position: relative; z-index: 2;
  font-size: 27px; font-weight: 800; color: var(--muted); letter-spacing: -.01em;
}
.jlabel {
  font-size: 13px; font-weight: 600; color: var(--muted);
  text-align: center; max-width: 15ch; line-height: 1.35;
}

/* stage shapes */
.shape-diamond .jshape { clip-path: polygon(50% 1%, 99% 50%, 50% 99%, 1% 50%); }
.shape-square  .jshape { border-radius: 20px; }
.shape-circle  .jshape { border-radius: 50%; }
.shape-star    .jshape {
  clip-path: polygon(50% 0%, 61% 33%, 98% 35%, 68% 57%, 79% 93%, 50% 71%, 21% 93%, 32% 57%, 2% 35%, 39% 33%);
}
.shape-triangle .jshape { clip-path: polygon(50% 2%, 98% 96%, 2% 96%); }
/* clipped shapes can't show a border, so the diamond/star/triangle use a subtle inner ring */

/* ---- Available ---- */
.jnode.is-active .jshape {
  background: linear-gradient(150deg, var(--accent), var(--accent-2));
  box-shadow: none;
  filter: drop-shadow(0 6px 16px color-mix(in srgb, var(--accent) 55%, transparent));
  animation: nodeFloat 2.8s var(--ease) infinite;
}
.jnode.is-active .jnum   { color: #fff; }
.jnode.is-active .jlabel { color: var(--text); }
.jnode.is-active .jdot:hover { transform: translateY(-3px) scale(1.04); }
@keyframes nodeFloat {
  0%, 100% { filter: drop-shadow(0 6px 14px color-mix(in srgb, var(--accent) 45%, transparent)); }
  50%      { filter: drop-shadow(0 10px 22px color-mix(in srgb, var(--accent) 70%, transparent)); }
}

/* ---- Completed ---- */
.jnode.is-done .jshape {
  background: linear-gradient(150deg, var(--success), var(--accent-2));
  box-shadow: none;
  filter: drop-shadow(0 5px 14px color-mix(in srgb, var(--success) 45%, transparent));
}
.jnode.is-done .jnum { color: color-mix(in srgb, #fff 78%, transparent); }
.jcheck { display: none; }
.jnode.is-done .jcheck {
  display: block; position: absolute; z-index: 3;
  right: -2px; bottom: -2px; width: 26px; height: 26px; border-radius: 50%;
  background: var(--success); box-shadow: 0 0 0 3px var(--bg);
}
.jnode.is-done .jcheck::before {
  content: ""; position: absolute; left: 9px; top: 4px;
  width: 7px; height: 12px; border: solid #fff; border-width: 0 2.5px 2.5px 0;
  transform: rotate(40deg);
}

/* ---- Locked ---- */
.jnode.is-locked .jdot { opacity: .55; }
.jnode.is-locked .jnum { color: var(--faint); }

/* ============================================================
   Review Challenge — centred golden milestone checkpoint
   ============================================================ */
.jreview {
  width: auto; max-width: 300px;
  margin: 6px auto 46px; align-items: stretch;
}
/* short vertical stub tying the checkpoint into the trail above */
.jreview::before {
  content: ""; position: absolute; z-index: -1;
  top: -32px; left: 50%; transform: translateX(-50%);
  width: 3px; height: 28px; border-radius: 3px;
  background: repeating-linear-gradient(var(--border) 0 6px, transparent 6px 13px);
}
.jreview.is-done::before { background: linear-gradient(var(--success), var(--accent-2)); }
.jbadge {
  position: relative; width: 100%;
  display: flex; flex-direction: column; align-items: center; gap: 9px;
  padding: 20px 26px 18px; cursor: pointer; font-family: inherit;
  border-radius: 22px; border: 1px solid var(--border);
  background: linear-gradient(160deg, var(--panel), var(--panel-soft, var(--panel)));
  transition: transform .25s var(--ease), box-shadow .3s, border-color .3s;
}
.jbadge:disabled { cursor: not-allowed; opacity: .55; }
.jbadge-medal { position: relative; width: 58px; height: 58px; margin-bottom: 2px; }
/* ribbon tails behind the medal */
.jbadge-ribbon::before, .jbadge-ribbon::after {
  content: ""; position: absolute; top: 34px; width: 12px; height: 24px;
  background: color-mix(in srgb, var(--accent-2) 60%, var(--border));
}
.jbadge-ribbon::before { left: 16px; transform: rotate(14deg); }
.jbadge-ribbon::after  { right: 16px; transform: rotate(-14deg); }
.jmedal {
  position: absolute; inset: 0; display: grid; place-items: center;
  border-radius: 50%; border: 3px solid color-mix(in srgb, #fff 30%, transparent);
  background: radial-gradient(circle at 35% 30%, #fff6d8, #c9a13a 70%);
  box-shadow: inset 0 0 0 1px #ffffff55;
}
.jmedal-star {
  width: 26px; height: 26px; background: #7a5b12;
  clip-path: polygon(50% 0%, 61% 33%, 98% 35%, 68% 57%, 79% 93%, 50% 71%, 21% 93%, 32% 57%, 2% 35%, 39% 33%);
}
.jbadge-meta { display: flex; flex-direction: column; align-items: center; gap: 3px; text-align: center; }
.jbadge-title { font-size: 15px; font-weight: 800; }
.jbadge-sub {
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
}

/* available milestone — glowing gold */
.jreview.is-active .jbadge {
  border-color: transparent;
  background: linear-gradient(160deg,
    color-mix(in srgb, #f5c451 22%, var(--panel)),
    color-mix(in srgb, var(--accent-2) 16%, var(--panel)));
  box-shadow: 0 0 0 1px color-mix(in srgb, #f5c451 50%, transparent),
              0 14px 34px -18px #f5c451;
  animation: badgeGlow 2.8s var(--ease) infinite;
}
.jreview.is-active .jbadge:hover { transform: translateY(-3px); }
@keyframes badgeGlow {
  0%, 100% { box-shadow: 0 0 0 1px color-mix(in srgb, #f5c451 50%, transparent), 0 10px 26px -18px #f5c451; }
  50%      { box-shadow: 0 0 0 4px color-mix(in srgb, #f5c451 16%, transparent), 0 16px 38px -14px #f5c451; }
}

/* locked milestone */
.jreview.is-locked .jmedal { background: radial-gradient(circle, var(--panel-soft, var(--panel)), var(--faint) 75%); }
.jreview.is-locked .jmedal-star { background: var(--bg); }

/* cleared milestone — green with a check */
.jreview.is-done .jbadge {
  border-color: color-mix(in srgb, var(--success) 50%, transparent);
  background: linear-gradient(160deg,
    color-mix(in srgb, var(--success) 16%, var(--panel)),
    color-mix(in srgb, var(--accent-2) 12%, var(--panel)));
}
.jreview.is-done .jmedal { background: radial-gradient(circle at 35% 30%, #d6f7e4, var(--success) 72%); }
.jreview.is-done .jmedal-star { background: #0c5132; }

/* CSS-only star reused by the Review modal badge */
.ptile-star {
  position: relative; display: inline-block; width: 22px; height: 22px;
  background: currentColor; color: #fff;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

/* ---------- Roadmap head extras ---------- */
.head-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.hub-subtitle { margin-top: -14px; margin-bottom: 22px; }

/* ---------- Grammar Category Menu ---------- */
.cat-card {
  position: relative;
  display: flex; flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--panel), var(--panel-soft));
  color: var(--text); overflow: hidden;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s, opacity .25s;
}
.cat-card.is-active:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow), var(--glow); }
.cat-card.is-soon { opacity: .6; }
.cat-card.is-complete { border-color: color-mix(in srgb, var(--success) 55%, var(--border)); }
/* The main clickable row */
.cat-open {
  position: relative; text-align: left; font-family: inherit;
  display: flex; align-items: flex-start; gap: 14px;
  padding: 18px; width: 100%;
  background: transparent; border: 0; color: inherit; cursor: pointer;
}
.cat-card.is-soon .cat-open { cursor: not-allowed; }
.cat-mark {
  display: grid; place-items: center; flex: 0 0 auto;
  width: 52px; height: 52px; border-radius: 15px;
  font-size: 26px; font-weight: 700; color: #fff;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px -4px var(--accent);
}
.cat-mark.is-word { font-size: 19px; letter-spacing: -1px; }
.cat-card.is-soon .cat-mark { filter: saturate(.5) brightness(.92); box-shadow: none; }
.cat-info { display: flex; flex-direction: column; gap: 5px; flex: 1; min-width: 0; padding-right: 64px; }
.cat-name { font-size: 18px; font-weight: 700; }
.cat-desc { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.cat-meta { font-size: 11px; color: var(--accent-2); font-weight: 700; letter-spacing: .3px; margin-top: 2px; }
.cat-meta.soon { color: var(--faint); }
.cat-status {
  position: absolute; top: 14px; right: 14px;
  font-size: 9.5px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase;
  padding: 4px 9px; border-radius: 99px;
  border: 1px solid var(--border); color: var(--muted); background: var(--panel-soft);
}
.cat-card.is-active .cat-status { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.cat-card.is-complete .cat-status { color: var(--success); border-color: color-mix(in srgb, var(--success) 50%, var(--border)); }
/* "Already know this" skip action */
.cat-skip {
  display: flex; align-items: center; gap: 10px;
  width: 100%; font-family: inherit; cursor: pointer; text-align: left;
  padding: 11px 18px;
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  border: 0; border-top: 1px solid var(--border);
  color: var(--muted); font-size: 12.5px; font-weight: 600;
  transition: background .2s, color .2s;
}
.cat-skip:hover { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--text); }
.cat-skip-box {
  width: 18px; height: 18px; flex: 0 0 auto; border-radius: 6px;
  border: 1.5px solid var(--border); background: var(--panel);
  display: grid; place-items: center; transition: background .2s, border-color .2s;
}
.cat-skip.is-checked { color: var(--success); cursor: default; }
.cat-skip.is-checked .cat-skip-box { background: var(--success); border-color: var(--success); }
.cat-skip.is-checked .cat-skip-box::after {
  content: ""; width: 5px; height: 9px; margin-top: -2px;
  border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg);
}

/* ---------- Kana path (grouped lessons) ---------- */
.kana-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 600px) { .kana-grid { grid-template-columns: 1fr 1fr; } }
.kana-group {
  position: relative; text-align: left; font-family: inherit;
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: linear-gradient(150deg, var(--panel), var(--panel-soft));
  color: var(--text); cursor: pointer;
  transition: transform .2s var(--ease), border-color .2s, box-shadow .2s, opacity .2s;
}
.kana-group.is-active:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--glow); }
.kana-group.is-soon { opacity: .55; cursor: not-allowed; }
.kana-group.is-done { border-color: color-mix(in srgb, var(--success) 50%, var(--border)); }
.kana-group-row {
  font-size: 20px; font-weight: 700; letter-spacing: 2px;
  color: var(--accent); flex: 0 0 auto; min-width: 4.2em;
}
.kana-group.is-done .kana-group-row { color: var(--success); }
.kana-group.is-soon .kana-group-row { color: var(--faint); }
.kana-group-info { display: flex; flex-direction: column; gap: 3px; }
.kana-group-label { font-size: 15px; font-weight: 700; }
.kana-group-meta { font-size: 11px; color: var(--muted); font-weight: 600; }

/* ---------- Kana lesson modal ---------- */
.kana-stage {
  display: flex; align-items: center; gap: 18px;
  margin-top: 16px; padding: 18px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: linear-gradient(150deg, color-mix(in srgb, var(--accent) 12%, transparent), color-mix(in srgb, var(--accent-2) 6%, transparent));
}
.kana-big {
  font-size: 64px; line-height: 1; font-weight: 700; color: var(--text);
  width: 1.4em; height: 1.4em; display: grid; place-items: center; flex: 0 0 auto;
  border-radius: 16px; background: var(--panel); border: 1px solid var(--border);
}
.kana-stage-info { display: flex; flex-direction: column; gap: 8px; min-height: 2em; justify-content: center; }
.kana-big-reading { font-size: 22px; font-weight: 700; color: var(--accent-2); min-height: 1em; }
.kana-big-note { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* Recognition practice (type the romaji) */
.kana-practice { margin-top: 18px; }
.kana-practice-prompt { font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.kana-practice-row { display: flex; gap: 10px; }
.kana-input {
  flex: 1; min-width: 0; font-family: inherit; font-size: 16px;
  padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--panel-soft); border: 1px solid var(--border); color: var(--text);
  transition: border-color .2s, box-shadow .2s;
}
.kana-input::placeholder { color: var(--faint); }
.kana-input:focus { outline: none; border-color: var(--accent); box-shadow: var(--glow); }
.kana-input:disabled { opacity: .55; }
.kana-practice-row .primary-btn { width: auto; flex: 0 0 auto; padding-left: 22px; padding-right: 22px; }
.kana-feedback { font-size: 13px; font-weight: 600; line-height: 1.5; min-height: 1.2em; margin-top: 12px; color: var(--muted); }
.kana-feedback.ok  { color: var(--success); }
.kana-feedback.err { color: var(--danger, #ff6b6b); }
.kana-progress { font-size: 11px; color: var(--faint); font-weight: 700; letter-spacing: .4px; margin-top: 8px; }

/* Character progress strip (non-interactive; reveals reading once solved) */
.kana-card-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.kana-chip {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 8px 12px; border-radius: 12px; min-width: 42px;
  background: var(--panel-soft); border: 1px solid var(--border); color: var(--muted);
}
.kana-chip.is-current { border-color: var(--accent); color: var(--text); box-shadow: var(--glow); }
.kana-chip.is-done { border-color: color-mix(in srgb, var(--success) 50%, var(--border)); color: var(--text); }
.kana-chip-ch { font-size: 20px; font-weight: 700; }
.kana-chip-r  { font-size: 10px; color: var(--muted); }
.kana-chip.is-done .kana-chip-r { color: var(--success); }

/* "Mark as learned" sits lower, clearly separated from the chips above */
.kana-learn-wrap {
  margin-top: var(--space-section);
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

/* ---------- Trophy Room tabs ---------- */
.trophy-tabs {
  display: flex; gap: 8px; margin-bottom: 18px;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}
.trophy-tab {
  flex: 0 0 auto; font-family: inherit; cursor: pointer;
  font-size: 12.5px; font-weight: 600; white-space: nowrap;
  padding: 9px 14px; border-radius: 99px;
  background: var(--panel); color: var(--muted); border: 1px solid var(--border);
  transition: color .2s, border-color .2s, background .2s;
}
.trophy-tab.is-current { color: var(--on-accent); background: linear-gradient(135deg, var(--accent-2), var(--accent)); border-color: transparent; }

/* ---------- Achievement unlock popup ---------- */
.achievement-overlay { align-items: center; z-index: 70; }
.ach-card {
  width: 100%; max-width: 380px; margin: 0 16px;
  text-align: center;
  padding: 30px 24px 26px;
  background: linear-gradient(180deg, var(--panel), var(--bg-top));
  border: 1px solid var(--border); border-radius: 24px;
  box-shadow: var(--shadow);
  transform: scale(.85); transition: transform .4s var(--ease);
}
.achievement-overlay.is-open .ach-card { transform: scale(1); }
.ach-burst {
  width: 92px; height: 92px; margin: 0 auto 16px; border-radius: 50%;
  display: grid; place-items: center;
  background: radial-gradient(circle, color-mix(in srgb, var(--warning) 55%, transparent), transparent 68%);
  animation: pop .5s var(--ease);
}
/* CSS-only star */
.ach-star {
  width: 46px; height: 46px;
  background: linear-gradient(140deg, #ffe08a, var(--warning));
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  filter: drop-shadow(0 0 10px color-mix(in srgb, var(--warning) 60%, transparent));
}
.ach-heading {
  font-size: 22px; font-weight: 800; letter-spacing: -.3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.ach-list { list-style: none; margin: 18px 0 4px; display: flex; flex-direction: column; gap: 10px; }
.ach-item {
  display: flex; align-items: center; gap: 12px; text-align: left;
  padding: 12px 14px; border-radius: 14px;
  background: var(--panel-soft); border: 1px solid var(--border);
}
.ach-medal {
  width: 34px; height: 34px; flex: 0 0 auto; border-radius: 50%;
  background: linear-gradient(140deg, var(--t, var(--accent)), var(--t-2, var(--accent-2)));
  display: grid; place-items: center;
}
.ach-medal::before {
  content: ""; width: 15px; height: 15px; background: #fff;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}
.ach-item-body { display: flex; flex-direction: column; gap: 2px; }
.ach-item-name { font-size: 15px; font-weight: 700; }
.ach-item-cat { font-size: 11px; color: var(--muted); font-weight: 600; }
.ach-card .primary-btn { margin-top: 22px; }

/* Disabled primary buttons (e.g. "Mark as learned" before completion) */
.primary-btn:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; transform: none; }

/* ---------- Confirm modal (generic) ---------- */
.confirm-overlay { align-items: center; z-index: 70; }
.confirm-card {
  width: 100%; max-width: 360px; margin: 0 16px; text-align: center;
  padding: 28px 24px 24px;
  background: linear-gradient(180deg, var(--panel), var(--bg-top));
  border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow);
  transform: scale(.9); transition: transform .35s var(--ease);
}
.confirm-overlay.is-open .confirm-card { transform: scale(1); }
.confirm-mark {
  display: grid; place-items: center; width: 58px; height: 58px; margin: 0 auto 14px;
  border-radius: 16px; font-size: 28px; font-weight: 700; color: #fff;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 20px -4px var(--accent);
}
.confirm-title { font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.confirm-msg { font-size: 13.5px; color: var(--muted); line-height: 1.55; }
.confirm-actions { display: flex; gap: 10px; margin-top: 22px; }
.confirm-actions .ghost-btn,
.confirm-actions .primary-btn { flex: 1; margin-top: 0; }

/* ---------- Lesson modal ---------- */

/* ---------- Japanese Study Hub: section cards ---------- */
.section-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 600px) {
  .section-grid { grid-template-columns: 1fr 1fr; }
}

/* Each section gets its own accent identity. */
.sec-grammar { --sec: #7c5cff; --sec-2: #4f8cff; }
.sec-vocab   { --sec: #29d3c2; --sec-2: #3fb98a; }
.sec-verbs   { --sec: #f0a13c; --sec-2: #ef7d4e; }
.sec-kanji   { --sec: #ff6b81; --sec-2: #e0568f; }

.section-card {
  position: relative; text-align: left; font-family: inherit;
  display: flex; align-items: flex-start; gap: 14px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(150deg, color-mix(in srgb, var(--sec) 12%, var(--panel)), var(--panel-soft));
  color: var(--text); cursor: pointer;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s, opacity .25s;
}
.section-card.is-active:hover {
  transform: translateY(-3px);
  border-color: var(--sec);
  box-shadow: var(--shadow), 0 0 22px -4px var(--sec);
}
.section-card.is-active:active { transform: translateY(0) scale(.99); }
.section-card.is-soon { opacity: .62; cursor: not-allowed; }

.sec-mark {
  display: grid; place-items: center; flex: 0 0 auto;
  width: 52px; height: 52px; border-radius: 15px;
  font-size: 26px; font-weight: 700; color: #fff;
  background: linear-gradient(140deg, var(--sec), var(--sec-2));
  box-shadow: 0 0 18px -4px var(--sec);
}
.section-card.is-soon .sec-mark { filter: saturate(.5) brightness(.9); box-shadow: none; }
.sec-info { display: flex; flex-direction: column; gap: 5px; flex: 1; min-width: 0; }
.sec-name { font-size: 18px; font-weight: 700; }
.sec-desc { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.sec-progress { display: flex; flex-direction: column; gap: 5px; margin-top: 4px; }
.sec-bar { height: 6px; border-radius: 99px; background: var(--border); overflow: hidden; }
.sec-bar > span { display: block; height: 100%; border-radius: 99px;
  background: linear-gradient(90deg, var(--sec), var(--sec-2)); transition: width .6s var(--ease); }
.sec-progress-text { font-size: 11px; color: var(--muted); font-weight: 600; letter-spacing: .3px; }
.sec-progress-text.soon { color: var(--faint); }
.sec-status {
  position: absolute; top: 14px; right: 14px;
  font-size: 9.5px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase;
  padding: 4px 9px; border-radius: 99px;
  border: 1px solid var(--border); color: var(--muted); background: var(--panel-soft);
}
.section-card.is-active .sec-status { color: var(--sec); border-color: color-mix(in srgb, var(--sec) 45%, var(--border)); }

/* ---------- Trophy Room ---------- */
.trophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 560px) {
  .trophy-grid { grid-template-columns: 1fr 1fr; }
}

/* Category accents. */
.cat-level { --t: var(--warning); --t-2: #ffb74d; }
.cat-grammar { --t: #7c5cff; --t-2: #4f8cff; }
.cat-streak { --t: #ff7a59; --t-2: var(--danger); }
.cat-vocab { --t: #29d3c2; --t-2: #3fb98a; }
.cat-verbs { --t: #f0a13c; --t-2: #ef7d4e; }
.cat-kanji { --t: #ff6b81; --t-2: #e0568f; }

.trophy-card {
  position: relative;
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--panel), var(--panel-soft));
  transition: border-color .25s, box-shadow .25s, opacity .25s, transform .25s var(--ease);
}
.trophy-card.is-unlocked { border-color: color-mix(in srgb, var(--t) 45%, var(--border)); box-shadow: 0 0 22px -6px var(--t); }
.trophy-card.is-unlocked:hover { transform: translateY(-2px); }
.trophy-card.is-locked { opacity: .55; }
.trophy-card.is-soon { opacity: .42; }

/* CSS-only trophy medal (circle + star), no images. */
.trophy-ico {
  position: relative; flex: 0 0 auto;
  width: 46px; height: 46px; border-radius: 50%;
  background: linear-gradient(140deg, var(--t), var(--t-2));
  display: grid; place-items: center;
}
.trophy-ico::before {
  content: ""; width: 22px; height: 22px;
  background: #fff;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}
.trophy-card.is-locked .trophy-ico,
.trophy-card.is-soon .trophy-ico { background: linear-gradient(140deg, var(--faint), var(--border)); }
.trophy-card.is-locked .trophy-ico::before,
.trophy-card.is-soon .trophy-ico::before { background: var(--panel); opacity: .7; }

.trophy-body { flex: 1; min-width: 0; }
.trophy-cat {
  display: inline-block; font-size: 9.5px; font-weight: 700;
  letter-spacing: .8px; text-transform: uppercase;
  color: var(--t); margin-bottom: 4px;
}
.trophy-card.is-locked .trophy-cat,
.trophy-card.is-soon .trophy-cat { color: var(--muted); }
.trophy-name { font-size: 15px; font-weight: 700; line-height: 1.3; }
.trophy-req { font-size: 11px; color: var(--muted); margin-top: 3px; font-weight: 600; }
.trophy-desc { font-size: 12px; color: var(--muted); line-height: 1.5; margin-top: 6px; }
.trophy-state {
  position: absolute; top: 14px; right: 14px;
  font-size: 9px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase;
  padding: 3px 8px; border-radius: 99px;
  border: 1px solid var(--border); background: var(--panel-soft); color: var(--muted);
}
.trophy-card.is-unlocked .trophy-state { color: var(--t); border-color: color-mix(in srgb, var(--t) 45%, var(--border)); }

/* ---------- Lesson modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 50;
  display: flex; align-items: flex-end; justify-content: center;
  background: rgba(5,6,12,.6); backdrop-filter: blur(6px);
  opacity: 0; pointer-events: none;
  transition: opacity .3s var(--ease);
}
.modal-overlay.is-open { opacity: 1; pointer-events: auto; }
.modal {
  position: relative;
  width: 100%; max-width: 560px;
  max-height: 92dvh; overflow-y: auto;
  background: linear-gradient(180deg, var(--panel), var(--bg-top));
  border: 1px solid var(--border);
  border-radius: 26px 26px 0 0;
  padding: 26px 22px 30px;
  box-shadow: var(--shadow);
  transform: translateY(100%);
  transition: transform .42s var(--ease);
}
.modal-overlay.is-open .modal { transform: translateY(0); }
@media (min-width: 620px) {
  .modal-overlay { align-items: center; }
  .modal { border-radius: 26px; }
}
.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--panel-soft);
  color: var(--muted); font-size: 20px; line-height: 1; cursor: pointer;
  transition: color .2s, border-color .2s;
}
.modal-close:hover { color: var(--text); border-color: var(--danger); }

.steps { display: flex; gap: 8px; margin-bottom: 18px; }
.step { width: 28px; height: 5px; border-radius: 99px; background: var(--border); transition: background .3s; }
.step.is-current { background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.step.is-done { background: var(--success); }

.mission-step { display: none; animation: fade-up .4s var(--ease); }
.mission-step.is-current { display: block; }
.mission-title { font-size: 26px; font-weight: 700; margin-top: 4px; letter-spacing: -.5px; }
.hl { color: var(--accent-2); }

.brief-card {
  margin: 18px 0; padding: 16px;
  background: var(--panel-soft); border: 1px solid var(--border);
  border-radius: var(--radius-sm); line-height: 1.6; font-size: 14px;
}
.brief-card p + p { margin-top: 8px; }
.brief-card .warn { color: var(--warning); font-size: 13px; }

.section-label { font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); margin: 18px 0 10px; }

.structure { display: flex; flex-wrap: wrap; gap: 10px; }
.formula {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-radius: 11px;
  background: var(--panel-soft); border: 1px solid var(--border);
  font-size: 15px;
}
.formula .slot { color: var(--accent); font-weight: 700; }
.formula .plus { color: var(--faint); }
.formula .tail { color: var(--accent-2); font-weight: 700; }

.example-list { display: flex; flex-direction: column; gap: 10px; }
.example {
  padding: 14px 16px; border-radius: var(--radius-sm);
  background: linear-gradient(150deg, color-mix(in srgb, var(--accent) 12%, transparent), color-mix(in srgb, var(--accent-2) 6%, transparent));
  border: 1px solid var(--border);
}
.example .jp { font-size: 19px; font-weight: 600; line-height: 1.5; }
.example .en { margin-top: 6px; color: var(--muted); font-size: 14px; }

/* ---------- Practice ---------- */
.prompt-hint { color: var(--muted); font-size: 13px; margin: 8px 0 16px; }
.answer-area {
  min-height: 64px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 14px;
  border: 1.5px dashed var(--border); border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--bg) 40%, transparent);
  transition: border-color .25s;
}
.answer-area.ok  { border-color: var(--success); }
.answer-area.err { border-color: var(--danger); animation: shake .4s; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-6px); } 75% { transform: translateX(6px); }
}
.answer-placeholder { color: var(--faint); font-size: 13px; }

.bank { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.block {
  font-family: inherit; font-size: 16px; font-weight: 600;
  padding: 12px 16px; border-radius: 13px;
  background: linear-gradient(150deg, var(--panel-soft), var(--panel));
  color: var(--text); cursor: pointer;
  border: 1px solid var(--border);
  transition: transform .18s var(--ease), border-color .2s, box-shadow .2s, opacity .2s;
}
.block:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--glow); }
.block:active { transform: scale(.95); }
.block.used { opacity: .25; pointer-events: none; }
.answer-area .block { border-color: var(--accent-2); }

.feedback { min-height: 20px; margin-top: 14px; font-size: 13px; line-height: 1.5; }
.feedback.ok  { color: var(--success); }
.feedback.err { color: var(--danger); }

.action-row { display: flex; gap: 12px; }

/* ---------- Multi-exercise practice (build / fix / particle / meaning) ---------- */
.ex-progress {
  font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin: 2px 0 14px;
}
.exercise { animation: fadeUp .35s var(--ease); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.ex-prompt { font-size: 15px; font-weight: 600; margin-bottom: 14px; line-height: 1.45; }
.ex-sentence {
  font-size: 22px; line-height: 1.5; margin: 6px 0 18px;
  padding: 16px 18px; border-radius: 14px;
  background: var(--panel-soft, var(--panel)); border: 1px solid var(--border);
}
.ex-sentence .blank {
  display: inline-block; min-width: 1.6em; text-align: center;
  padding: 0 6px; border-radius: 8px; font-weight: 700; color: var(--accent);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  border: 1px dashed color-mix(in srgb, var(--accent) 55%, transparent);
}
.ex-sentence .blank.filled {
  color: var(--success); background: color-mix(in srgb, var(--success) 18%, transparent);
  border-style: solid; border-color: color-mix(in srgb, var(--success) 55%, transparent);
}

.choice-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.choice-grid-col { flex-direction: column; }
.choice {
  flex: 1 1 auto; min-width: 64px;
  font-family: inherit; font-size: 17px; font-weight: 600; cursor: pointer;
  padding: 14px 18px; border-radius: 14px; color: var(--text);
  background: var(--panel-soft, var(--panel)); border: 1px solid var(--border);
  transition: transform .18s var(--ease), border-color .2s, background .2s;
}
.choice-wide { flex: 1 1 100%; text-align: left; font-size: 15px; font-weight: 500; }
.choice:hover:not(:disabled) { transform: translateY(-2px); border-color: var(--accent); }
.choice:disabled { cursor: default; }
.choice.ok  { border-color: var(--success); background: color-mix(in srgb, var(--success) 18%, transparent); color: var(--success); }
.choice.err { border-color: var(--danger);  background: color-mix(in srgb, var(--danger) 14%, transparent);  color: var(--danger); animation: shake .4s; }

/* ---------- Vocabulary section ---------- */
.vocab-cat-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 12px; margin-top: var(--space-section);
}
@media (min-width: 680px) { .vocab-cat-grid { grid-template-columns: 1fr 1fr; } }

.vocab-cat-card {
  display: flex; flex-direction: column; gap: 11px;
  width: 100%; padding: 16px 18px; border-radius: var(--radius);
  background: linear-gradient(150deg, color-mix(in srgb, var(--accent) 9%, var(--panel)), var(--panel));
  border: 1px solid var(--border); color: var(--text); text-align: left; cursor: pointer;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
}
.vocab-cat-card:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--glow); }
.vocab-cat-card.is-done { border-color: color-mix(in srgb, var(--success) 50%, var(--border)); }
.vocab-cat-head { display: flex; align-items: flex-start; gap: 12px; }
.vocab-cat-mark {
  flex-shrink: 0; display: grid; place-items: center;
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 22px; font-weight: 800; box-shadow: var(--glow);
}
.vocab-cat-info { flex: 1; min-width: 0; }
.vocab-cat-title { display: block; font-size: 16px; font-weight: 800; }
.vocab-cat-desc { display: block; color: var(--muted); font-size: 12px; line-height: 1.45; margin-top: 4px; }
.vocab-cat-status {
  flex-shrink: 0; font-size: 10px; font-weight: 800; letter-spacing: .45px;
  padding: 5px 9px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  color: var(--accent); background: var(--panel-soft);
}
.vocab-cat-card.is-done .vocab-cat-status { color: var(--success); border-color: color-mix(in srgb, var(--success) 50%, var(--border)); }
.vocab-cat-meta { color: var(--muted); font-size: 12px; font-weight: 700; }
.vocab-cat-bar {
  display: block; height: 6px; border-radius: 999px;
  background: var(--panel-soft); overflow: hidden;
}
.vocab-cat-bar span {
  display: block; height: 100%; border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .4s var(--ease);
}

.vocab-search-modal {
  max-width: 680px;
  padding-top: 24px;
}
.vocab-search-input {
  width: 100%; margin-top: 16px; padding: 13px 14px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--panel-soft); color: var(--text);
  font: inherit; font-size: 15px; outline: none;
}
.vocab-search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.vocab-search-summary {
  min-height: 18px; margin-top: 10px;
  color: var(--muted); font-size: 12px; font-weight: 800;
}
.vocab-search-results {
  display: grid; grid-template-columns: 1fr;
  gap: 10px; margin-top: 14px;
}
.vocab-search-card {
  display: grid; gap: 9px;
  padding: 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel);
}
.vocab-search-card.is-learned {
  border-color: color-mix(in srgb, var(--success) 45%, var(--border));
}
.vocab-search-main {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; min-width: 0;
}
.vocab-search-word {
  color: var(--text); font-size: 24px; line-height: 1.2;
  font-weight: 800; overflow-wrap: anywhere;
}
.vocab-search-reading {
  color: var(--accent-2); font-size: 13px; font-weight: 800;
  text-align: right; overflow-wrap: anywhere;
}
.vocab-search-meaning {
  color: var(--text); font-size: 14px; font-weight: 800;
}
.vocab-search-meta {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.vocab-search-category,
.vocab-search-state {
  display: inline-flex; align-items: center; min-height: 24px;
  padding: 4px 8px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--muted);
  background: var(--panel-soft); font-size: 10px; font-weight: 800;
  text-transform: uppercase;
}
.vocab-search-card.is-learned .vocab-search-state {
  color: var(--success);
  border-color: color-mix(in srgb, var(--success) 45%, var(--border));
}
.vocab-search-learn {
  width: 100%; min-height: 42px; padding: 10px 12px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--panel-soft); color: var(--text);
  font-size: 13px; font-weight: 800; cursor: pointer;
}
.vocab-search-learn:hover:not(:disabled) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--panel-soft));
}
.vocab-search-learn.is-done,
.vocab-search-learn:disabled {
  color: var(--success);
  border-color: color-mix(in srgb, var(--success) 45%, var(--border));
  cursor: default;
}
@media (min-width: 620px) {
  .vocab-search-results { grid-template-columns: 1fr 1fr; }
}

.vocab-study-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-top: var(--space-section); flex-wrap: wrap;
}
.vocab-study-progress { font-size: 13px; font-weight: 700; color: var(--muted); }
.vocab-practice-cta { flex-shrink: 0; }
.vocab-card-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 14px; margin-top: 18px;
}
@media (min-width: 560px) { .vocab-card-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 860px) { .vocab-card-grid { grid-template-columns: repeat(3, 1fr); } }

.vocab-card {
  display: flex; flex-direction: column; min-height: 230px;
  padding: 18px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--border);
  animation: fadeUp .35s var(--ease);
}
.vocab-card.is-learned { border-color: color-mix(in srgb, var(--success) 45%, var(--border)); }
.vocab-word {
  font-size: 34px; line-height: 1.18; font-weight: 800; text-align: center;
  color: var(--text); overflow-wrap: anywhere;
}
.vocab-reading { color: var(--accent-2); font-size: 14px; font-weight: 700; text-align: center; margin-top: 8px; overflow-wrap: anywhere; }
.vocab-meaning { color: var(--text); font-size: 16px; font-weight: 800; text-align: center; margin-top: 14px; }
.vocab-pos {
  align-self: center; margin: 12px 0 16px;
  padding: 5px 10px; border-radius: 999px; border: 1px solid var(--border);
  color: var(--muted); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .45px;
}
.vocab-learn-btn {
  width: 100%; margin-top: auto; padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel-soft);
  color: var(--text); font-size: 13px; font-weight: 800; cursor: pointer;
  transition: border-color .2s, background .2s;
}
.vocab-learn-btn:hover:not(:disabled) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--panel-soft)); }
.vocab-learn-btn.is-done, .vocab-learn-btn:disabled {
  color: var(--success); border-color: color-mix(in srgb, var(--success) 45%, var(--border));
  cursor: default;
}

.vocab-step[hidden] { display: none; }
.vocab-step { animation: fadeUp .3s var(--ease); }
.vocab-step[data-vocabstep="intro"],
.vocab-step[data-vocabstep="reward"] { text-align: center; }
#vocab-practice-modal.is-open .vocab-practice-modal { transform: translateY(0) !important; }
.vocab-practice-modal { padding-top: 22px; padding-bottom: 24px; }
.vocab-practice-badge {
  display: block; width: 56px; height: 56px; margin: 2px auto 10px;
  border-radius: 15px; font-size: 29px; font-weight: 800; line-height: 56px; text-align: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; box-shadow: var(--glow);
}
.vocab-step[data-vocabstep="intro"] > .primary-btn { margin-top: 18px; }
.vocab-ex-word {
  font-size: 40px; line-height: 1.15; font-weight: 800; text-align: center;
  margin: 8px 0 6px; overflow-wrap: anywhere;
}
.vocab-ex-reading { color: var(--accent-2); font-size: 14px; font-weight: 700; text-align: center; margin-bottom: 12px; }
.vocab-ex-meaning { font-size: 20px; font-weight: 800; text-align: center; margin: 10px 0 16px; }
.vocab-choice { min-height: 54px; }
.vocab-japanese-choices .choice { font-size: 20px; }

/* Consistent breathing room above standalone mission CTAs and button groups
   (Start practice, Check/Reset row, Finish) so they never hug the text above. */
.mission-step > .primary-btn,
.mission-step > .action-row,
.build-ex > .action-row { margin-top: var(--space-cta); }

/* ---------- Review Challenge modal ---------- */
.review-step[hidden] { display: none; }
.review-step { animation: fadeUp .3s var(--ease); }
.review-step[data-rstep="intro"],
.review-step[data-rstep="reward"] { text-align: center; }
.review-intro { color: var(--muted); font-size: 14px; line-height: 1.6; margin: 10px 0 4px; }
.review-step[data-rstep="intro"] > .primary-btn { margin-top: var(--space-cta); }
.review-badge {
  display: inline-grid; place-items: center;
  width: 76px; height: 76px; margin: 4px auto 12px; border-radius: 50%;
  color: #f5c451;
  background: radial-gradient(circle, color-mix(in srgb, #f5c451 30%, transparent), transparent 70%);
  border: 1px solid color-mix(in srgb, #f5c451 40%, transparent);
}
.review-badge .ptile-star { width: 34px; height: 34px; color: #f5c451; }

.primary-btn {
  flex: 1; font-family: inherit; font-size: 15px; font-weight: 700;
  padding: 15px; border: none; border-radius: 14px; cursor: pointer;
  color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: var(--glow);
  transition: transform .2s var(--ease), filter .2s;
}
.primary-btn:hover { transform: translateY(-2px); filter: brightness(1.08); }
.primary-btn:active { transform: translateY(0) scale(.99); }
.ghost-btn {
  font-family: inherit; font-size: 15px; font-weight: 600;
  padding: 15px 20px; border-radius: 14px; cursor: pointer;
  background: transparent; color: var(--muted); border: 1px solid var(--border);
  transition: color .2s, border-color .2s;
}
.ghost-btn:hover { color: var(--text); border-color: var(--danger); }

/* ---------- Reward ---------- */
.mission-step[data-step="reward"] { text-align: center; }
.reward-burst {
  width: 90px; height: 90px; margin: 6px auto 14px; border-radius: 50%;
  background: radial-gradient(circle, var(--warning), transparent 65%);
  position: relative; animation: pop .5s var(--ease);
}
.reward-burst::before {
  content: "✓"; position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 40px; color: var(--warning); font-weight: 700;
}
@keyframes pop { 0% { transform: scale(.4); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }
.reward-line { color: var(--muted); margin-top: 8px; font-size: 14px; }
.reward-tiles { display: flex; gap: 14px; justify-content: center; margin: 24px 0; }
.reward-tile {
  display: flex; flex-direction: column; gap: 4px;
  padding: 18px 26px; border-radius: var(--radius-sm);
  background: var(--panel-soft); border: 1px solid var(--border);
}
.reward-num { font-size: 26px; font-weight: 700; color: var(--warning); }
.reward-cap { font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 40px);
  z-index: 80;
  padding: 12px 18px; border-radius: 12px;
  background: var(--panel); border: 1px solid var(--border);
  color: var(--text); font-size: 13px; font-weight: 600;
  box-shadow: var(--shadow);
  opacity: 0; pointer-events: none;
  transition: transform .35s var(--ease), opacity .35s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Copyright footer (shared, unobtrusive) ---------- */
.app-footer {
  text-align: center;
  margin-top: var(--space-section);
  padding: 18px 0 4px;
  font-size: 11px;
  letter-spacing: .4px;
  color: var(--faint);
}

/* ---------- Kanji section (JLPT levels, groups, cards, practice) ---------- */
.kj-level-grid, .kj-group-grid {
  display: flex; flex-direction: column; gap: 12px;
  margin-top: var(--space-section);
}
.kj-level-card, .kj-group-card {
  display: flex; align-items: center; gap: 14px;
  width: 100%; padding: 16px 18px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--border);
  color: var(--text); text-align: left; cursor: pointer;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
}
.kj-level-card.is-active:hover, .kj-group-card.is-active:hover {
  transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--glow);
}
.kj-level-card.is-soon, .kj-group-card.is-locked { opacity: .58; cursor: not-allowed; }
.kj-group-card.is-done { border-color: color-mix(in srgb, var(--success) 50%, var(--border)); }

.kj-level-mark {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center; font-size: 22px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; box-shadow: var(--glow);
}
.kj-level-card.is-soon .kj-level-mark { filter: saturate(.5); box-shadow: none; }

.kj-level-info, .kj-group-head { flex: 1; min-width: 0; }
.kj-level-name, .kj-group-title { display: block; font-size: 16px; font-weight: 700; }
.kj-level-desc, .kj-level-meta, .kj-group-meta {
  display: block; font-size: 12px; color: var(--muted); margin-top: 3px;
}
.kj-level-status, .kj-group-status {
  flex-shrink: 0; font-size: 11px; font-weight: 700; letter-spacing: .5px;
  padding: 5px 10px; border-radius: 999px; border: 1px solid var(--border);
  color: var(--muted);
}
.kj-level-card.is-active .kj-level-status,
.kj-group-card.is-active .kj-group-status { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.kj-group-card.is-done .kj-group-status { color: var(--success); border-color: color-mix(in srgb, var(--success) 50%, var(--border)); }

.kj-group-card { flex-direction: column; align-items: stretch; gap: 10px; }
.kj-group-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.kj-group-bar {
  display: block; height: 5px; border-radius: 999px;
  background: var(--panel-soft); overflow: hidden;
}
.kj-group-bar span {
  display: block; height: 100%; border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .4s var(--ease);
}

.kj-lesson-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-top: var(--space-section); flex-wrap: wrap;
}
.kj-lesson-progress { font-size: 13px; font-weight: 600; color: var(--muted); }
.kj-practice-cta { flex-shrink: 0; }

.kj-card-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 14px; margin-top: 18px;
}
@media (min-width: 520px) { .kj-card-grid { grid-template-columns: 1fr 1fr; } }

.kj-card {
  padding: 18px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--border);
  animation: fadeUp .35s var(--ease);
}
.kj-card.is-learned { border-color: color-mix(in srgb, var(--success) 45%, var(--border)); }
.kj-card-char {
  font-size: 52px; line-height: 1; font-weight: 700; text-align: center;
  margin-bottom: 10px; color: var(--text);
}
.kj-card-meaning { font-size: 15px; font-weight: 700; text-align: center; margin-bottom: 6px; }
.kj-card-reading { font-size: 12px; color: var(--muted); text-align: center; margin-bottom: 10px; }
.kj-card-example {
  font-size: 12px; color: var(--muted); text-align: center; line-height: 1.45;
  padding: 10px; border-radius: var(--radius-sm);
  background: var(--panel-soft); margin-bottom: 14px;
}
.kj-ex-word { color: var(--text); font-weight: 600; }

.kj-learn-btn {
  width: 100%; padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel-soft);
  color: var(--text); font-size: 13px; font-weight: 700; cursor: pointer;
  transition: border-color .2s, background .2s;
}
.kj-learn-btn:hover:not(:disabled) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--panel-soft)); }
.kj-learn-btn.is-done, .kj-learn-btn:disabled {
  color: var(--success); border-color: color-mix(in srgb, var(--success) 45%, var(--border));
  cursor: default;
}

.kj-practice-badge {
  display: block; width: 64px; height: 64px; margin: 6px auto 14px;
  border-radius: 16px; font-size: 32px; font-weight: 700; line-height: 64px; text-align: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; box-shadow: var(--glow);
}

.kj-ex-kanji {
  font-size: 56px; font-weight: 700; text-align: center; margin: 12px 0 18px;
}
.kj-ex-meaning { font-size: 18px; font-weight: 700; text-align: center; }
.kj-choice-kanji { font-size: 28px; min-width: 64px; min-height: 56px; }

@media (max-width: 380px) {
  .stat-text small { display: none; }
  .title { font-size: 26px; }
}

@media (max-width: 767px) {
  .theme-pro {
    --shadow: 0 14px 34px -22px rgba(0,0,0,.72);
    --glow: 0 0 11px -1px var(--accent);
  }
  .theme-kawaii {
    --shadow: 0 14px 30px -22px rgba(120,70,130,.36);
    --glow: 0 0 12px -2px var(--accent);
  }
  .theme-cozy {
    --shadow: 0 14px 30px -22px rgba(110,80,40,.34);
    --glow: 0 0 12px -2px var(--accent);
  }

  .orb { filter: blur(35px); }
  .topbar { backdrop-filter: blur(9px); box-shadow: 0 14px 38px -30px rgba(0,0,0,.86); }
  #screen-home { box-shadow: 0 20px 52px -36px rgba(0,0,0,.9); }
  .dashboard-hero { backdrop-filter: blur(9px); box-shadow: 0 18px 46px -38px rgba(0,210,255,.62); }
  .dashboard-card { backdrop-filter: blur(8px); box-shadow: 0 18px 46px -36px rgba(0,0,0,.9); }
  .dashboard-card.is-open:hover { box-shadow: 0 20px 50px -38px rgba(41,211,194,.72); }
  .hud-panel { backdrop-filter: blur(8px); box-shadow: none; }
  .modal-overlay { backdrop-filter: blur(3px); }

  .ky-brand-mark { box-shadow: 0 0 9px -4px rgba(41,211,194,.68); }
  .kiwi-companion { filter: drop-shadow(0 0 14px rgba(0,210,255,.2)); }
  .kiwi-shadow { filter: blur(2.5px); }
  .kiwi-body,
  .kiwi-headset,
  .kiwi-visor,
  .kiwi-eye,
  .kiwi-core-dot,
  .kiwi-core-ring {
    filter: none;
  }
  .dashboard-icon { box-shadow: 0 0 18px rgba(41,211,194,.2); }
  .reward-orb { box-shadow: 0 0 15px rgba(255,206,92,.24); }

  #screen-home::before,
  .kiwi-svg,
  .kiwi-visor-line,
  .node.is-current,
  .milestone-badge.is-available {
    animation: none;
  }
}

@media (max-width: 960px) {
  .dashboard-hero { grid-template-columns: 1fr; }
  .kiwi-companion { width: min(260px, 70vw); }
  .dashboard-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-panels { grid-template-columns: 1fr; }
  .learn-card-grid,
  .game-grid,
  .tool-grid,
  .progress-grid { grid-template-columns: 1fr 1fr; }
  .tool-detail-top {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .tool-comparison-grid {
    grid-template-columns: 1fr;
  }
  .tool-detail-overview {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  body:has(#screen-home.is-active) .topbar {
    flex-direction: column;
    align-items: stretch;
  }
  body:has(#screen-home.is-active) .topbar-right {
    justify-content: space-between;
  }
  #screen-home {
    padding: 12px;
    border-radius: 22px;
  }
  .dashboard-hero {
    gap: 12px;
    padding: 16px;
    min-height: 0;
  }
  #screen-home .title {
    font-size: 34px;
    max-width: none;
  }
  .kiwi-companion { width: min(190px, 68vw); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .dashboard-card {
    min-height: 218px;
    padding: 18px;
  }
  .dashboard-icon {
    width: 64px;
    height: 64px;
  }
  .hud-stat-grid { grid-template-columns: 1fr; }
  .learn-card-grid,
  .game-grid,
  .tool-grid,
  .progress-grid,
  .prompt-compare,
  .choice-grid { grid-template-columns: 1fr; }
  .lesson-detail,
  .interactive-panel,
  .learn-card,
  .tool-card,
  .game-card,
  .progress-tile { padding: 16px; }
  .tool-detail {
    padding: 16px;
    gap: 20px;
  }
  .prompt-battle-panel {
    padding: 16px;
    gap: 18px;
  }
  .prompt-battle-choice {
    min-height: 0;
    padding: 14px;
  }
  .tool-detail-top {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .tool-comparison-grid {
    gap: 12px;
  }
  .tool-detail-overview {
    grid-column: auto;
  }
  .tool-rating-row {
    grid-template-columns: 1fr auto;
    padding: 12px;
    column-gap: 12px;
  }
  .tool-rating-meter {
    grid-column: 1 / -1;
    min-width: 0;
  }
  .tool-detail-list {
    padding: 14px;
  }
  .tool-comparison-block {
    padding: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #screen-home::before,
  .kiwi-svg,
  .kiwi-visor-line {
    animation: none;
  }
}