/* ==========================================================================
   English Learning Platform · V4 Design System
   --------------------------------------------------------------------------
   目标：现代英语学习产品（学习平台 + 内容平台 + 轻游戏化）
   - 全站唯一样式表（V4），替代早期多份 CSS 的叠加
   - 蓝色只是品牌色之一；六大技能各带独立视觉语言
   - 图标系统：Lucide（ISC）内联 SVG，见 templates/_icons.html
   - 插画系统：自制 SVG（app/static/img/ill-*.svg）
   ========================================================================== */

/* ============================= 1. Design Tokens ============================ */
:root {
  /* ---- 品牌 ---- */
  --brand: #6d5efc;
  --brand-2: #8b5cf6;
  --brand-3: #4f46e5;
  --brand-ink: #5b4df0;
  --brand-soft: #eeebff;
  --brand-soft-2: #e0e7ff;
  --accent: #22d3ee;
  --accent-soft: #e0f7fe;

  /* ---- 六大技能（功能色，独立视觉语言）---- */
  --c-vocab: #6366f1;      --c-vocab-2: #8b5cf6;   --c-vocab-soft: #eef2ff;
  --c-listen: #06b6d4;     --c-listen-2: #14b8a6;  --c-listen-soft: #ecfeff;
  --c-read: #f59e0b;       --c-read-2: #f97316;    --c-read-soft: #fff7ed;
  --c-grammar: #a855f7;    --c-grammar-2: #7c3aed; --c-grammar-soft: #faf5ff;
  --c-speak: #f43f5e;      --c-speak-2: #fb7185;   --c-speak-soft: #fff1f2;
  --c-write: #f59e0b;      --c-write-2: #fbbf24;   --c-write-soft: #fefce8;
  --c-games: #f43f5e;
  --c-tutor-1: #312e81;    --c-tutor-2: #6d28d9;

  /* ---- 语义色 ---- */
  --green: #10b981;  --green-2: #34d399;  --green-bg: #ecfdf5;
  --amber: #f59e0b;  --amber-2: #fbbf24;  --amber-bg: #fffbeb;
  --red: #ef4444;    --red-2: #f87171;    --red-bg: #fef2f2;
  --sky: #0ea5e9;    --sky-2: #38bdf8;    --sky-bg: #f0f9ff;
  --violet: #8b5cf6; --violet-2: #a78bfa; --violet-bg: #f5f3ff;
  --mint: #14b8a6;   --mint-2: #2dd4bf;   --mint-bg: #f0fdfa;
  --pink: #ec4899;   --pink-2: #f472b6;   --pink-bg: #fdf2f8;
  --indigo: #6366f1; --indigo-2: #818cf8; --indigo-bg: #eef2ff;

  /* ---- 中性 ---- */
  --bg: #f6f6fb;
  --bg-2: #f0f1fa;
  --panel: #ffffff;
  --panel-2: #fafafe;
  --ink: #171a2b;
  --ink-2: #4b5066;
  --ink-3: #8b90a6;
  --ink-4: #c2c6d6;
  --line: #eceef5;
  --line-2: #e3e6f0;
  --slate-bg: #eef2ff;

  /* ---- 圆角 ---- */
  --radius: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  /* ---- 阴影 ---- */
  --shadow-sm: 0 1px 2px rgba(23,26,43,.05);
  --shadow: 0 4px 14px rgba(23,26,43,.07);
  --shadow-pop: 0 14px 34px rgba(79,70,229,.16);
  --shadow-card: 0 6px 24px -6px rgba(23,26,43,.10);

  /* ---- 动效 ---- */
  --ease: cubic-bezier(.4,0,.2,1);
  --dur: .22s;

  /* ---- 字号 ---- */
  --fs-xs: 12px; --fs-sm: 13px; --fs-md: 15px; --fs-lg: 18px; --fs-xl: 24px; --fs-2xl: 34px;

  /* ---- 旧版变量别名（模板内联样式兼容）---- */
  --ds-sp-1: 4px; --ds-sp-2: 8px; --ds-sp-3: 12px; --ds-sp-4: 16px;
  --ds-sp-5: 20px; --ds-sp-6: 24px; --ds-sp-7: 32px; --ds-sp-8: 40px;
  --ds-brand: #6d5efc; --ds-brand-dark: #4f46e5; --ds-brand-darker: #4338ca;
  --ds-brand-ring: rgba(109,94,252,.28); --ds-brand-soft: #eeebff; --ds-brand-soft-2: #e0e7ff;
  --ds-danger: #ef4444; --ds-danger-bg: #fef2f2;
  --ds-info-bg: #eff6ff;
  --ds-ink: #171a2b; --ds-ink-2: #4b5066; --ds-ink-3: #8b90a6; --ds-ink-4: #c2c6d6;
  --ds-line: #eceef5; --ds-line-strong: #e3e6f0;
  --ds-r-xs: 8px; --ds-r-sm: 10px; --ds-r-md: 14px; --ds-r-lg: 20px; --ds-r-xl: 28px;
  --ds-sh-1: 0 1px 2px rgba(23,26,43,.05);
  --ds-sh-2: 0 4px 14px rgba(23,26,43,.07);
  --ds-sh-3: 0 14px 34px rgba(79,70,229,.16);
  --ds-success: #10b981; --ds-success-bg: #ecfdf5;
  --ds-warning: #f59e0b; --ds-warning-bg: #fffbeb;
  --ds-surface: #ffffff; --ds-surface-2: #fafafe;
  --ds-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ds-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --ds-dur: .22s; --ds-ease: cubic-bezier(.4,0,.2,1);

  /* ---- V3 别名 ---- */
  --v3-brand: #6d5efc; --v3-brand-2: #22d3ee; --v3-bg: #f6f6fb; --v3-bg-2: #f0f1fa;
  --v3-card: #ffffff; --v3-ink: #171a2b; --v3-ink-2: #4b5066; --v3-ink-3: #8b90a6;
  --v3-line: #eceef5; --v3-mid: #e3e6f0;
  --v3-r: 14px; --v3-r-sm: 10px; --v3-r-lg: 20px; --v3-r-xl: 28px;
  --v3-sh: 0 4px 14px rgba(23,26,43,.07); --v3-sh-md: 0 6px 24px -6px rgba(23,26,43,.10);
  --v3-sh-lg: 0 14px 34px rgba(79,70,229,.16); --v3-sh-brand: 0 10px 26px rgba(109,94,252,.35);
  --v3-ease: cubic-bezier(.4,0,.2,1); --v3-fast: .18s;
  --v3-sky: #0ea5e9; --v3-green: #10b981; --v3-amber: #f59e0b; --v3-pink: #ec4899; --v3-indigo: #6366f1;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-rounded: "Arial Rounded MT Bold", "Baloo 2", ui-rounded, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ============================= 2. Reset & Base ============================ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(109,94,252,.07), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(34,211,238,.06), transparent 55%),
    var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; vertical-align: middle; }
a { color: var(--brand-ink); text-decoration: none; }
a:hover { text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 15px; }
h1, h2, h3, h4 { margin: 0 0 .4em; line-height: 1.25; letter-spacing: -.02em; color: var(--ink); }
p { margin: 0 0 .8em; }
::selection { background: rgba(109,94,252,.22); }

/* ============================= 3. Layout ============================ */
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
main.container { padding-top: 96px; padding-bottom: 64px; min-height: calc(100vh - 200px); }

.grid { display: grid; gap: var(--ds-sp-4); }
.grid-2 { display: grid; gap: var(--ds-sp-4); grid-template-columns: 1fr 1fr; }
.stack { display: flex; flex-direction: column; gap: var(--ds-sp-4); }
.row { display: flex; align-items: center; gap: var(--ds-sp-3); flex-wrap: wrap; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--ds-sp-3); flex-wrap: wrap; }
.stack-v > * + * { margin-top: var(--ds-sp-4); }

/* ============================= 4. Typography ============================ */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase;
  color: var(--brand-ink);
  background: var(--brand-soft); border: 1px solid rgba(109,94,252,.16);
  padding: 5px 12px; border-radius: var(--radius-pill);
}
.muted { color: var(--ink-3); }
.small { font-size: var(--fs-sm); }
.mono { font-family: var(--ds-font-mono); }

.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--ds-sp-4); margin: 8px 0 22px; flex-wrap: wrap; }
.page-head h2 { font-size: var(--fs-xl); font-weight: 900; margin: 8px 0 2px; }
.page-head p { margin: 0; color: var(--ink-3); font-size: var(--fs-sm); }

.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--ds-sp-3); margin: 34px 0 16px; flex-wrap: wrap; }
.sec-title { font-size: 20px; font-weight: 900; margin: 0; }
.sec-sub { margin: 2px 0 0; color: var(--ink-3); font-size: 13px; }
.sec-more { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 700; color: var(--brand-ink); padding: 7px 12px; border-radius: var(--radius-pill); background: var(--brand-soft); transition: all var(--dur) var(--ease); }
.sec-more:hover { background: var(--brand-soft-2); transform: translateX(2px); }

.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.section-title h3 { font-size: 16px; font-weight: 800; margin: 0; }
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.card-head h3 { font-size: 16px; font-weight: 800; margin: 0; }
.card-head .sub { font-size: 12px; color: var(--ink-3); }

/* ============================= 5. Topbar & Navigation ============================ */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(255,255,255,.86); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 20px; height: 64px;
  display: flex; align-items: center; gap: 18px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff; font-weight: 900; font-size: 17px; letter-spacing: -.04em;
  box-shadow: 0 6px 16px rgba(109,94,252,.35);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text b { font-size: 15px; font-weight: 900; color: var(--ink); }
.brand-text small { font-size: 9.5px; letter-spacing: .12em; color: var(--ink-3); text-transform: uppercase; font-weight: 700; }

.ds-nav { display: flex; align-items: center; gap: 2px; flex: 1 1 auto; }
.ds-nav > a, .nav-drop-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px; border-radius: var(--radius-pill);
  font-size: 14px; font-weight: 700; color: var(--ink-2);
  transition: all var(--dur) var(--ease); white-space: nowrap;
}
.ds-nav > a:hover, .nav-drop-toggle:hover { background: var(--bg-2); color: var(--ink); }
.ds-nav > a.active, .nav-drop-toggle.active { color: var(--brand-ink); background: var(--brand-soft); }
.ds-nav .icon { width: 17px; height: 17px; }
.nav-icon-link { position: relative; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; color: var(--ink-2); transition: all var(--dur) var(--ease); }
.nav-icon-link:hover { background: var(--bg-2); color: var(--ink); }
.nav-icon-link .icon { width: 17px; height: 17px; }
.nav-count {
  position: absolute; top: -4px; right: -4px; min-width: 16px; height: 16px; padding: 0 4px;
  border-radius: var(--radius-pill); background: var(--red); color: #fff;
  font-size: 10px; font-weight: 800; display: grid; place-items: center;
}

/* Learn dropdown */
.nav-drop { position: relative; }
.nav-drop .icon.chevron-right { width: 13px; height: 13px; opacity: .55; transform: rotate(90deg); }
.nav-drop-menu {
  position: absolute; top: calc(100% + 10px); left: 0; min-width: 252px;
  background: #fff; border: 1px solid var(--line); border-radius: 18px;
  box-shadow: var(--shadow-pop); padding: 8px;
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: all .18s var(--ease); z-index: 120;
}
.nav-drop:hover .nav-drop-menu, .nav-drop:focus-within .nav-drop-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-drop-menu a { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px; color: var(--ink); transition: background var(--dur) var(--ease); }
.nav-drop-menu a:hover { background: var(--bg-2); }
.nav-drop-menu .nd-ico { width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; color: #fff; flex-shrink: 0; }
.nav-drop-menu .nd-ico .icon { width: 18px; height: 18px; }
.nav-drop-menu b { display: block; font-size: 14px; line-height: 1.2; }
.nav-drop-menu small { font-size: 11px; color: var(--ink-3); }

.topbar-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  width: 36px; height: 36px; border-radius: 11px; border: 1px solid var(--line);
  background: #fff; color: var(--ink-2); font-size: 14px;
  transition: all var(--dur) var(--ease);
}
.icon-btn:hover { border-color: var(--brand-soft-2); color: var(--brand-ink); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.icon-btn.on { background: var(--brand-soft); color: var(--brand-ink); border-color: transparent; }
.icon-btn .icon { width: 17px; height: 17px; }
.icon-btn.sm { width: 32px; height: 32px; }
.icon-btn.wide { width: auto; padding: 0 12px; }

/* XP / Streak / Avatar chips */
.gam-chip {
  display: inline-flex; align-items: center; gap: 5px;
  height: 32px; padding: 0 11px; border-radius: var(--radius-pill);
  font-size: 12.5px; font-weight: 800; color: var(--ink);
  background: #fff; border: 1px solid var(--line);
  transition: all var(--dur) var(--ease);
}
.gam-chip .icon { width: 15px; height: 15px; }
.gam-chip.xp { color: #7c3aed; }
.gam-chip.xp .icon { color: #8b5cf6; }
.gam-chip.streak { color: #d97706; }
.gam-chip.streak .icon { color: #f59e0b; }
.gam-chip:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }

.user-chip { display: inline-flex; align-items: center; gap: 8px; padding: 3px 10px 3px 4px; border-radius: var(--radius-pill); background: #fff; border: 1px solid var(--line); transition: all var(--dur) var(--ease); }
.user-chip:hover { border-color: var(--brand-soft-2); box-shadow: var(--shadow-sm); }
.user-chip b { font-size: 13px; font-weight: 800; }
.avatar {
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #22d3ee, #6366f1);
  color: #fff; font-size: 13px; font-weight: 900; font-style: normal;
}
.chip-lv { font-size: 10px; font-weight: 800; color: var(--brand-ink); background: var(--brand-soft); border-radius: var(--radius-pill); padding: 2px 7px; }

/* Mobile bottom tabbar */
.tabbar {
  display: none;
  position: fixed; inset: auto 0 0 0; z-index: 100;
  background: rgba(255,255,255,.94); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.tabbar-inner { display: flex; max-width: 560px; margin: 0 auto; }
.tabbar a {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 9px 0 8px; font-size: 10px; font-weight: 700; color: var(--ink-3);
  transition: color var(--dur) var(--ease);
}
.tabbar a .icon { width: 21px; height: 21px; transition: transform var(--dur) var(--ease); }
.tabbar a.active { color: var(--brand-ink); }
.tabbar a.active .icon { transform: translateY(-1px) scale(1.08); }

/* ============================= 6. Buttons ============================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: var(--radius-pill);
  padding: 10px 18px; font-size: 14px; font-weight: 800; line-height: 1.3;
  transition: all var(--dur) var(--ease); white-space: nowrap;
}
.btn .icon { width: 16px; height: 16px; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 8px 20px -6px rgba(109,94,252,.5);
}
.btn-primary:hover { box-shadow: 0 12px 26px -6px rgba(109,94,252,.6); filter: saturate(1.06); }

.btn-secondary { color: var(--ink); background: var(--bg-2); border-color: var(--line); }
.btn-secondary:hover { background: var(--line); }

.btn-ghost { color: var(--ink-2); background: transparent; }
.btn-ghost:hover { background: var(--bg-2); color: var(--ink); }

.btn-outline { color: var(--brand-ink); background: #fff; border-color: var(--brand-soft-2); }
.btn-outline:hover { background: var(--brand-soft); }

.btn-link { color: var(--brand-ink); background: none; border: none; padding: 4px 2px; font-weight: 700; border-radius: 6px; }
.btn-link:hover { text-decoration: underline; }

.btn-sm { padding: 6px 13px; font-size: 13px; }
.btn-lg { padding: 14px 26px; font-size: 16px; border-radius: 18px; }
.btn-block { width: 100%; }

/* gradient CTA variant */
.btn-cta {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), #a855f7 45%, var(--accent));
  background-size: 160% 160%;
  box-shadow: 0 10px 26px -8px rgba(109,94,252,.6);
}
.btn-cta:hover { background-position: 100% 50%; box-shadow: 0 14px 32px -8px rgba(109,94,252,.7); }

/* ============================= 7. Forms ============================ */
.field { margin-bottom: var(--ds-sp-4); }
.field label { display: block; font-size: 13px; font-weight: 700; color: var(--ink-2); margin-bottom: 6px; }
.input {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--line-2); border-radius: 12px;
  background: #fff; color: var(--ink); font-size: 15px;
  transition: all var(--dur) var(--ease);
  outline: none;
}
.input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--ds-brand-ring); }
select.input { appearance: auto; }
.hint { font-size: 12px; color: var(--ink-3); margin-top: 5px; }
.errs { font-size: 12.5px; color: var(--red); margin-top: 5px; }
.check-row { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--ink-2); }
.check-row input { width: 16px; height: 16px; accent-color: var(--brand); }

.otp-row { display: flex; gap: 8px; }
.otp-input { letter-spacing: .5em; font-family: var(--ds-font-mono); text-align: center; }
.code-msg { margin-top: 8px; padding: 8px 12px; border-radius: 10px; font-size: 13px; background: var(--ds-info-bg); color: #1d4ed8; }
.code-msg.err { background: var(--red-bg); color: var(--red); }
.code-msg.dev { background: var(--amber-bg); color: #b45309; }

/* segmented tabs */
.seg-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; background: var(--bg-2); padding: 5px; border-radius: 14px; margin-bottom: 18px; }
.seg-tab { display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 10px; border: none; background: transparent; border-radius: 10px; font-size: 14px; font-weight: 800; color: var(--ink-3); transition: all var(--dur) var(--ease); }
.seg-tab .icon { width: 16px; height: 16px; }
.seg-tab.active { background: #fff; color: var(--brand-ink); box-shadow: var(--shadow-sm); }
.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeUp .3s var(--ease); }
.pane-sub { font-size: 13px; color: var(--ink-3); margin: -6px 0 14px; }

/* ============================= 8. Cards, tags, misc ============================ */
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: var(--ds-sp-5);
  box-shadow: var(--shadow-sm);
}
.tag {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: var(--radius-pill);
  font-size: 11.5px; font-weight: 800;
  background: var(--bg-2); color: var(--ink-2);
}
.tag.blue  { background: var(--sky-bg); color: #0369a1; }
.tag.green { background: var(--green-bg); color: #047857; }
.tag.amber { background: var(--amber-bg); color: #b45309; }
.tag.red   { background: var(--red-bg); color: #b91c1c; }
.tag.violet{ background: var(--violet-bg); color: #6d28d9; }
.tag .icon { width: 13px; height: 13px; }

.score-pill { display: inline-block; padding: 2px 10px; border-radius: var(--radius-pill); font-size: 12px; font-weight: 800; }
.score-pill.hi { background: var(--green-bg); color: #047857; }
.score-pill.mid { background: var(--amber-bg); color: #b45309; }
.score-pill.lo { background: var(--red-bg); color: #b91c1c; }

.pill { display: inline-flex; align-items: center; gap: 4px; padding: 3px 9px; border-radius: var(--radius-pill); background: var(--bg-2); font-size: 11.5px; font-weight: 700; color: var(--ink-2); }

.icon { width: 18px; height: 18px; flex-shrink: 0; }

/* ---- 双语结构：默认同显 English / 中文，data-lang 切换 ---- */
.bi { display: inline-flex; align-items: baseline; flex-wrap: wrap; gap: 0 5px; }
.bi-en { color: inherit; }
.bi-zh { color: inherit; }
.bi-en + .bi-zh::before { content: "/"; margin-right: 5px; color: var(--ink-4); font-weight: 400; }
html[data-lang="zh"] .bi-en,
html[data-lang="zh"] .bi-en + .bi-zh::before { display: none; }
html[data-lang="en"] .bi-zh { display: none; }
html[data-lang="en"] .bi-en + .bi-zh::before { display: none; }
.bi-subtle .bi-zh { color: var(--ink-3); font-size: .94em; }

/* ---- 杂项组件 ---- */
.tags { display: flex; gap: 6px; flex-wrap: wrap; }
.ico { font-size: 22px; }
.otp-send { flex-shrink: 0; }

/* icon chips by module color */
.c-violet  { --c1: var(--c-vocab);   --c2: var(--c-vocab-2);   --soft: var(--c-vocab-soft); }
.c-sky     { --c1: var(--c-listen);  --c2: var(--c-listen-2);  --soft: var(--c-listen-soft); }
.c-amber   { --c1: var(--c-read);    --c2: var(--c-read-2);    --soft: var(--c-read-soft); }
.c-rose    { --c1: var(--c-grammar); --c2: var(--c-grammar-2); --soft: var(--c-grammar-soft); }
.c-emerald { --c1: var(--c-speak);   --c2: var(--c-speak-2);   --soft: var(--c-speak-soft); }
.c-indigo  { --c1: var(--c-write);   --c2: var(--c-write-2);   --soft: var(--c-write-soft); }

.flashes { margin-bottom: 16px; }
.flash { padding: 12px 16px; border-radius: 12px; font-size: 14px; font-weight: 600; margin-bottom: 8px; border: 1px solid transparent; }
.flash.success { background: var(--green-bg); color: #047857; border-color: #bbf7d0; }
.flash.error   { background: var(--red-bg); color: #b91c1c; border-color: #fecaca; }
.flash.info    { background: var(--ds-info-bg); color: #1d4ed8; border-color: #bfdbfe; }

.toast {
  position: fixed; left: 50%; bottom: 90px; transform: translate(-50%, 20px);
  background: var(--ink); color: #fff; padding: 11px 20px; border-radius: var(--radius-pill);
  font-size: 13.5px; font-weight: 600; opacity: 0; pointer-events: none;
  transition: all .25s var(--ease); z-index: 300; box-shadow: var(--shadow-pop); max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.footer { margin-top: 40px; padding: 26px 0 10px; border-top: 1px solid var(--line); text-align: center; font-size: 13px; color: var(--ink-3); }
.footer p { margin: 3px 0; }
.footer b { color: var(--ink-2); }

/* ============================= 9. Landing page ============================ */
.land-hero {
  position: relative; overflow: hidden;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center;
  padding: 44px 0 30px;
}
.land-hero h1 {
  font-size: clamp(34px, 4.6vw, 56px); font-weight: 900; letter-spacing: -.03em;
  line-height: 1.08; margin: 16px 0 14px;
  background: linear-gradient(120deg, #312e81 10%, var(--brand) 45%, #0e7490 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.land-hero .sub { font-size: 17px; color: var(--ink-2); max-width: 480px; margin-bottom: 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 26px; margin-top: 30px; flex-wrap: wrap; }
.hero-trust .ht { display: flex; align-items: center; gap: 9px; font-size: 13.5px; font-weight: 700; color: var(--ink-2); }
.hero-trust .ht .icon { width: 20px; height: 20px; color: var(--brand); }

.hero-art { position: relative; }
.hero-art img { border-radius: 28px; box-shadow: var(--shadow-card); width: 100%; }
.hero-art .float-badge {
  position: absolute; display: flex; align-items: center; gap: 8px;
  background: #fff; border-radius: 14px; padding: 10px 14px;
  box-shadow: var(--shadow-pop); font-size: 13px; font-weight: 800;
  animation: floaty 5s ease-in-out infinite;
}
.hero-art .fb-1 { top: 20px; left: -18px; color: #7c3aed; }
.hero-art .fb-2 { bottom: 26px; right: -14px; color: #d97706; animation-delay: 1.2s; }
.hero-art .fb-3 { top: 46%; right: -20px; color: #0e7490; animation-delay: 2.2s; }
.hero-art .float-badge .icon { width: 18px; height: 18px; }

/* learning path cards */
.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.path-card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  padding: 18px; border-radius: 22px; overflow: hidden;
  background: #fff; border: 1px solid var(--line);
  transition: all .26s var(--ease);
}
.path-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card); border-color: transparent; }
.path-card .path-top { display: flex; align-items: center; justify-content: space-between; }
.path-ico { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: #fff; }
.path-ico .icon { width: 26px; height: 26px; }
.path-emoji { font-size: 26px; }
.path-card h3 { font-size: 17px; font-weight: 900; margin: 2px 0 0; }
.path-card .path-desc { font-size: 13px; color: var(--ink-3); min-height: 38px; }
.path-bar { height: 8px; border-radius: var(--radius-pill); background: var(--bg-2); overflow: hidden; }
.path-bar i { display: block; height: 100%; border-radius: inherit; }
.path-card .path-cta { margin-top: 4px; display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 800; color: var(--brand-ink); }
.path-lock { position: absolute; top: 14px; right: 14px; display: inline-flex; align-items: center; gap: 4px; font-size: 11px; font-weight: 800; color: var(--ink-3); background: var(--bg-2); border-radius: var(--radius-pill); padding: 3px 9px; }
.path-lock .icon { width: 12px; height: 12px; }

/* feature strip */
.feature-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 40px 0; }
.feature-item { display: flex; gap: 12px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px; transition: all var(--dur) var(--ease); }
.feature-item:hover { box-shadow: var(--shadow-card); transform: translateY(-3px); }
.feature-item .fi-ico { width: 40px; height: 40px; border-radius: 13px; display: grid; place-items: center; color: #fff; flex-shrink: 0; }
.feature-item .fi-ico .icon { width: 20px; height: 20px; }
.feature-item b { display: block; font-size: 14.5px; }
.feature-item p { margin: 2px 0 0; font-size: 12.5px; color: var(--ink-3); }

/* word of the day on landing */
.daily-word {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  background: linear-gradient(120deg, #f5f3ff, #eef2ff 55%, #ecfeff);
  border: 1px solid #e0e7ff; border-radius: 24px; padding: 26px 30px;
  margin: 34px 0; overflow: hidden; position: relative;
}
.daily-word::after {
  content: ""; position: absolute; right: -60px; top: -60px; width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(109,94,252,.14), transparent 70%);
}
.dw-word { font-size: 34px; font-weight: 900; letter-spacing: -.02em; }
.wc-ipa { color: var(--ink-3); font-family: var(--ds-font-mono); font-size: 14px; }
.daily-word .speak { margin-left: auto; }

/* landing CTA banner */
.cta-banner {
  position: relative; overflow: hidden;
  border-radius: 28px; padding: 44px 40px; text-align: center; color: #fff;
  background: linear-gradient(120deg, #4f46e5, #7c3aed 50%, #db2777);
}
.cta-banner h2 { color: #fff; font-size: 30px; font-weight: 900; margin-bottom: 8px; }
.cta-banner p { color: rgba(255,255,255,.85); margin-bottom: 22px; }
.cta-banner .btn-white { background: #fff; color: #6d28d9; }
.cta-banner .btn-white:hover { box-shadow: 0 12px 28px rgba(0,0,0,.18); }
.cta-banner .deco { position: absolute; border-radius: 50%; background: rgba(255,255,255,.12); }
.cta-banner .d1 { width: 200px; height: 200px; left: -60px; top: -80px; }
.cta-banner .d2 { width: 140px; height: 140px; right: -40px; bottom: -60px; }

/* ============================= 10. Dashboard ============================ */
.dash-top {
  position: relative; overflow: hidden;
  border-radius: 26px; padding: 28px 30px; color: #fff;
  background: linear-gradient(120deg, #4f46e5 0%, #6d5efc 45%, #8b5cf6 75%, #a855f7 100%);
  box-shadow: 0 18px 40px -12px rgba(109,94,252,.55);
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.dash-top::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(600px 240px at 90% -20%, rgba(255,255,255,.22), transparent 60%),
    radial-gradient(400px 200px at 10% 120%, rgba(34,211,238,.35), transparent 60%);
  pointer-events: none;
}
.dash-top h1 { color: #fff; font-size: 28px; font-weight: 900; margin: 6px 0 2px; }
.dash-top .dash-date { color: rgba(255,255,255,.82); font-size: 13.5px; }
.dash-top .dash-stats { position: relative; display: flex; gap: 12px; flex-wrap: wrap; }
.dash-tile {
  min-width: 96px; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.22);
  backdrop-filter: blur(6px); border-radius: 16px; padding: 12px 14px; text-align: center;
}
.dash-tile b { display: block; font-size: 22px; font-weight: 900; line-height: 1.1; }
.dash-tile span { font-size: 11px; font-weight: 700; color: rgba(255,255,255,.85); text-transform: uppercase; letter-spacing: .06em; }
.dash-tile .icon { width: 18px; height: 18px; margin: 0 auto 4px; display: block; color: #ffe08a; }

/* Today's goal segmented bar */
.goal-row { position: relative; display: flex; align-items: center; gap: 18px; margin-top: 16px; }
.goal-label { font-size: 13px; font-weight: 800; color: rgba(255,255,255,.92); white-space: nowrap; }
.goal-segments { flex: 1; display: flex; gap: 5px; }
.goal-segments i { flex: 1; height: 14px; border-radius: 5px; background: rgba(255,255,255,.22); }
.goal-segments i.on { background: linear-gradient(90deg, #ffe08a, #fbbf24); box-shadow: 0 0 10px rgba(251,191,36,.5); }
.goal-pct { font-size: 15px; font-weight: 900; color: #ffe08a; }

.stat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.stat { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 14px 16px; }
.stat .icon { width: 20px; height: 20px; color: var(--brand); }
.stat b { font-size: 22px; font-weight: 900; letter-spacing: -.02em; line-height: 1.1; }
.stat span { font-size: 11.5px; color: var(--ink-3); font-weight: 700; }
.stat-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
  background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 14px 16px;
  transition: all var(--dur) var(--ease);
}
a.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); }
.stat-ico { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--c1, var(--brand)), var(--c2, var(--brand-2))); }
.stat-ico .icon { width: 19px; height: 19px; }
.stat-card .stat-val { font-size: 24px; font-weight: 900; letter-spacing: -.02em; line-height: 1.1; margin-top: 2px; }
.stat-card .stat-label { font-size: 11.5px; color: var(--ink-3); font-weight: 700; }

/* continue learning card */
.continue-card {
  position: relative; overflow: hidden; display: flex; align-items: center; gap: 22px;
  background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: 20px 22px;
  box-shadow: var(--shadow-sm); transition: all .26s var(--ease);
}
.continue-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); }
.cont-cover {
  position: relative; width: 150px; height: 110px; border-radius: 18px; flex-shrink: 0; overflow: hidden;
  display: grid; place-items: center; color: #fff;
}
.cont-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cont-cover .icon { width: 40px; height: 40px; }
.cont-cover .play-dot {
  position: absolute; right: 8px; bottom: 8px; width: 34px; height: 34px; border-radius: 50%;
  background: #fff; display: grid; place-items: center; color: var(--brand); box-shadow: var(--shadow);
}
.cont-cover .play-dot .icon { width: 16px; height: 16px; margin-left: 2px; }
.cont-body { flex: 1; min-width: 200px; }
.cont-body h3 { font-size: 18px; font-weight: 900; margin: 2px 0 2px; }
.cont-body .cont-meta { display: flex; gap: 10px; flex-wrap: wrap; margin: 4px 0 10px; }
.cont-bar { height: 10px; border-radius: var(--radius-pill); background: var(--bg-2); overflow: hidden; }
.cont-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--brand), var(--brand-2)); }

/* daily challenge */
.challenge {
  display: flex; align-items: center; gap: 16px;
  background: linear-gradient(120deg, #fffbeb, #fff7ed 60%, #fefce8);
  border: 1.5px solid #fde68a; border-radius: 22px; padding: 20px 22px;
}
.challenge-ico { width: 52px; height: 52px; border-radius: 16px; background: linear-gradient(135deg, #f59e0b, #f97316); display: grid; place-items: center; color: #fff; flex-shrink: 0; }
.challenge-ico .icon { width: 26px; height: 26px; }
.challenge-body { flex: 1; }
.challenge-body b { font-size: 16px; display: block; }
.challenge-body p { margin: 3px 0 0; font-size: 13px; color: var(--ink-2); }
.streak-row { display: flex; gap: 6px; margin-top: 10px; }
.streak-day { width: 26px; height: 26px; border-radius: 9px; background: #fed7aa; }
.streak-day.on { background: linear-gradient(135deg, #fbbf24, #f59e0b); box-shadow: 0 4px 10px rgba(245,158,11,.4); }

/* recommended cards */
.rec-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.rec-card {
  position: relative; overflow: hidden; border-radius: 22px; background: #fff;
  border: 1px solid var(--line); display: flex; flex-direction: column;
  transition: all .26s var(--ease);
}
.rec-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card); }
.rec-cover { position: relative; height: 110px; overflow: hidden; }
.rec-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.rec-cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(15,23,42,.28)); }
.rec-level { position: absolute; left: 10px; bottom: 10px; z-index: 2; background: rgba(255,255,255,.92); color: var(--ink); border-radius: var(--radius-pill); padding: 2px 9px; font-size: 11px; font-weight: 800; }
.rec-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.rec-body h3 { font-size: 15.5px; font-weight: 900; margin: 0; }
.rec-body p { font-size: 12.5px; color: var(--ink-3); margin: 0; }
.rec-body .rec-cta { margin-top: auto; padding-top: 10px; }

/* xp bar */
.xpbar { display: flex; flex-direction: column; gap: 10px; }
.xpbar-top { display: flex; align-items: center; gap: 12px; }
.lv-badge {
  width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand), #a855f7); color: #fff;
  font-size: 16px; font-weight: 900; box-shadow: 0 8px 18px -6px rgba(109,94,252,.55);
}
.xpbar-meta b { font-size: 18px; font-weight: 900; display: block; line-height: 1.1; }
.xpbar-meta small { color: var(--ink-3); }
.xpbar-track { height: 12px; border-radius: var(--radius-pill); background: var(--bg-2); overflow: hidden; }
.xpbar-track i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #8b5cf6, #22d3ee); transition: width 1s var(--ease); }

/* badges */
.badge-wall { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.badge-item {
  display: flex; flex-direction: column; align-items: center; gap: 5px; text-align: center;
  background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 14px 8px;
  opacity: .5; filter: grayscale(1); transition: all var(--dur) var(--ease);
}
.badge-item.on { opacity: 1; filter: none; border-color: #fde68a; background: linear-gradient(180deg, #fffbeb, #fff); box-shadow: 0 8px 20px -8px rgba(245,158,11,.35); }
.badge-ico { font-size: 26px; line-height: 1; }
.badge-item b { font-size: 12px; line-height: 1.25; }
.badge-item small { font-size: 10.5px; color: var(--ink-3); line-height: 1.3; }

/* skill cards (shared: dashboard, hub, module pages) */
.skill-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.skill-card {
  position: relative; display: flex; gap: 14px; align-items: flex-start;
  background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 16px;
  overflow: hidden; transition: all .26s var(--ease);
}
.skill-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: transparent; }
.skill-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 5px;
  background: linear-gradient(90deg, var(--c1, var(--brand)), var(--c2, var(--brand-2)));
  opacity: 0; transition: opacity var(--dur) var(--ease);
}
.skill-card:hover::before { opacity: 1; }
.skill-ico { width: 48px; height: 48px; border-radius: 15px; display: grid; place-items: center; color: #fff; flex-shrink: 0; background: linear-gradient(135deg, var(--c1, var(--brand)), var(--c2, var(--brand-2))); }
.skill-ico .icon { width: 24px; height: 24px; }
.skill-body { flex: 1; min-width: 0; }
.skill-name { font-size: 15.5px; font-weight: 900; display: block; }
.skill-desc { font-size: 12.5px; color: var(--ink-3); display: block; margin: 2px 0 8px; }
.skill-bar { height: 7px; border-radius: var(--radius-pill); background: var(--bg-2); overflow: hidden; }
.skill-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--c1, var(--brand)), var(--c2, var(--brand-2))); }
.skill-xp { font-size: 11.5px; font-weight: 800; color: var(--c1, var(--brand)); align-self: flex-start; white-space: nowrap; }
.skill-soon { position: absolute; top: 10px; right: 10px; font-size: 10px; font-weight: 800; color: var(--ink-3); background: var(--bg-2); border-radius: var(--radius-pill); padding: 2px 8px; }
.skill-card.is-locked { opacity: .82; }
.skill-card.is-locked:hover { opacity: 1; }

/* game cards */
.game-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.game-card {
  position: relative; display: flex; gap: 14px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 18px;
  overflow: hidden; transition: all .26s var(--ease);
}
.game-card:hover { transform: translateY(-4px) rotate(-.3deg); box-shadow: var(--shadow-card); }
.game-card::after {
  content: ""; position: absolute; right: -40px; top: -40px; width: 140px; height: 140px;
  border-radius: 50%; background: radial-gradient(circle, var(--c1, var(--brand)), transparent 70%);
  opacity: .16; transition: opacity var(--dur) var(--ease);
}
.game-card:hover::after { opacity: .3; }
.game-ico {
  width: 64px; height: 64px; border-radius: 20px; display: grid; place-items: center; color: #fff; flex-shrink: 0;
  background: linear-gradient(135deg, var(--c1, var(--brand)), var(--c2, var(--brand-2)));
  box-shadow: 0 10px 22px -8px var(--c1, var(--brand));
}
.game-ico .icon { width: 30px; height: 30px; }
.game-body { flex: 1; min-width: 0; }
.game-name { font-size: 17px; font-weight: 900; display: block; }
.game-desc { font-size: 12.5px; color: var(--ink-3); display: block; margin: 2px 0 8px; }
.game-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.game-go { width: 40px; height: 40px; border-radius: 50%; background: var(--brand-soft); display: grid; place-items: center; color: var(--brand-ink); flex-shrink: 0; transition: all var(--dur) var(--ease); }
.game-card:hover .game-go { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; transform: translateX(3px); }
.game-go .icon { width: 18px; height: 18px; }

/* play button on game card */
.game-play {
  display: inline-flex; align-items: center; gap: 7px;
  color: #fff; font-size: 13px; font-weight: 900;
  background: linear-gradient(135deg, var(--c1, var(--brand)), var(--c2, var(--brand-2)));
  padding: 8px 18px; border-radius: var(--radius-pill);
  box-shadow: 0 8px 18px -6px var(--c1, var(--brand));
  transition: all var(--dur) var(--ease);
}
.game-play:hover { transform: translateY(-2px); box-shadow: 0 12px 24px -6px var(--c1, var(--brand)); }
.game-play .icon { width: 15px; height: 15px; }

/* chart */
.chart { display: flex; align-items: flex-end; gap: 10px; height: 110px; padding-top: 6px; }
.chart .col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 5px; height: 100%; justify-content: flex-end; }
.chart .bar2 { width: 70%; border-radius: 8px 8px 4px 4px; background: linear-gradient(180deg, #a78bfa, #6d5efc); transition: height .6s var(--ease); }
.chart small { font-size: 10.5px; color: var(--ink-3); }

/* ============================= 11. Word cards & word pages ============================ */
.word-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.wordcard {
  background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px;
  transition: all .24s var(--ease); position: relative;
}
.wordcard:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); border-color: transparent; }
.wordcard::before {
  content: ""; position: absolute; inset: auto 0 0 0; height: 4px; border-radius: 0 0 20px 20px;
  background: linear-gradient(90deg, #c7d2fe, #a5b4fc); opacity: 0; transition: opacity var(--dur) var(--ease);
}
.wordcard:hover::before { opacity: 1; }
.wc-word-row { display: flex; align-items: center; gap: 10px; }
.wc-word { font-size: 24px; font-weight: 900; letter-spacing: -.02em; margin: 0; }
.wc-word a { color: var(--ink); }
.wc-word a:hover { color: var(--brand-ink); }
.wc-pron { display: flex; align-items: center; gap: 8px; margin: 2px 0 8px; }
.wc-ipa { color: var(--ink-3); font-family: var(--ds-font-mono); font-size: 13.5px; }
.wc-pos { font-size: 11px; font-weight: 800; color: var(--brand-ink); background: var(--brand-soft); padding: 2px 8px; border-radius: var(--radius-pill); }
.wc-meaning { font-size: 16px; font-weight: 700; margin: 0 0 10px; }
.wc-example { background: var(--panel-2); border-radius: 12px; padding: 10px 12px; margin-bottom: 10px; }
.wc-example .en { font-size: 14px; margin: 0; }
.wc-example .zh { font-size: 12.5px; color: var(--ink-3); margin: 3px 0 0; }
.wc-status { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.wc-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; border-top: 1px dashed var(--line); padding-top: 12px; }
.wc-actions .icon-btn { width: auto; padding: 0 10px; }
.wc-actions .bi { font-size: 12.5px; font-weight: 700; }

.speak {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%; border: none;
  background: var(--brand-soft); color: var(--brand-ink);
  transition: all var(--dur) var(--ease);
}
.speak:hover { transform: scale(1.08); background: var(--brand-soft-2); }
.speak .icon { width: 18px; height: 18px; }
.speak.big { width: 56px; height: 56px; }
.speak.big .icon { width: 26px; height: 26px; }
.speak.sm { width: 30px; height: 30px; }
.speak.sm .icon { width: 14px; height: 14px; }
.speak.playing { background: linear-gradient(135deg, var(--brand), var(--accent)); color: #fff; animation: pulse 1.2s ease-in-out infinite; }

.toolbar { display: flex; gap: 10px; margin-bottom: 16px; }
.letter-row { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 18px; }
.letter { display: grid; place-items: center; min-width: 30px; height: 30px; padding: 0 8px; border-radius: 9px; font-size: 12.5px; font-weight: 800; color: var(--ink-2); background: #fff; border: 1px solid var(--line); transition: all var(--dur) var(--ease); }
.letter:hover { border-color: var(--brand-soft-2); color: var(--brand-ink); }
.letter.on { background: var(--brand); color: #fff; border-color: transparent; }
.letter.off { opacity: .4; }

/* detail page */
.detail-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.detail-word { font-size: 40px; font-weight: 900; letter-spacing: -.03em; margin: 0; }
.detail-ipa { font-size: 16px; font-weight: 600; color: var(--ink-3); margin-left: 10px; font-family: var(--ds-font-mono); }
.tags { display: flex; gap: 6px; flex-wrap: wrap; }
.detail-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 14px; margin: 18px 0; }
.detail-grid .example { background: var(--panel-2); border-radius: 14px; padding: 16px; }
.detail-nav { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; border-top: 1px dashed var(--line); padding-top: 16px; }
.feature { display: block; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 16px; text-align: center; transition: all var(--dur) var(--ease); }
.feature:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); }
.feature em { font-style: normal; font-size: 26px; }
.feature .feature-icon { display: inline-flex; font-size: 26px; margin-bottom: 2px; }
.feature .feature-icon .icon { width: 26px; height: 26px; }
.feature h4 { font-size: 14px; margin: 8px 0 2px; }
.feature p { font-size: 12px; color: var(--ink-3); margin: 0; }

/* ============================= 12. Empty states ============================ */
.empty { text-align: center; padding: 34px 20px; }
.empty em { font-style: normal; font-size: 42px; line-height: 1; display: block; margin-bottom: 8px; }
.empty img.ill { width: 220px; max-width: 70%; border-radius: 20px; margin-bottom: 8px; }
.empty .icon { width: 40px; height: 40px; color: var(--ink-3); }
.empty b { display: block; font-size: 17px; margin: 10px 0 4px; }
.empty p { color: var(--ink-3); font-size: 13.5px; margin: 0 auto 16px; max-width: 380px; }
.empty .btn { margin: 0 4px; }

.empty-card {
  background: #fff; border: 1px solid var(--line); border-radius: 24px; overflow: hidden;
  display: grid; grid-template-columns: 1fr 1.1fr; align-items: center;
  box-shadow: var(--shadow-sm);
}
.empty-card .ec-ill { padding: 18px; display: grid; place-items: center; background: linear-gradient(160deg, var(--ec1, #eef2ff), var(--ec2, #ecfeff)); }
.empty-card .ec-ill img { width: 100%; max-width: 300px; border-radius: 16px; }
.empty-card .ec-body { padding: 26px 28px; }
.empty-card .ec-body h3 { font-size: 21px; font-weight: 900; margin: 8px 0 6px; }
.empty-card .ec-body p { color: var(--ink-3); font-size: 14px; margin-bottom: 18px; }

/* ============================= 13. Quiz ============================ */
.setup-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.opt-card {
  border: 1.5px solid var(--line-2); border-radius: 14px; padding: 13px 14px;
  background: #fff; cursor: pointer; transition: all var(--dur) var(--ease);
}
.opt-card b { display: flex; align-items: center; gap: 7px; font-size: 14px; }
.opt-card b .icon { width: 16px; height: 16px; color: var(--ink-3); }
.opt-card span { font-size: 12px; color: var(--ink-3); display: block; margin-top: 2px; }
.opt-card:hover { border-color: var(--brand-soft-2); transform: translateY(-2px); }
.opt-card.on { border-color: var(--brand); background: var(--brand-soft); box-shadow: 0 6px 16px -8px rgba(109,94,252,.4); }
.opt-card.on b { color: var(--brand-ink); }
.opt-card.on b .icon { color: var(--brand-ink); }

.quiz-card { max-width: 720px; margin: 0 auto; background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: 26px; box-shadow: var(--shadow-card); }
.quiz-top { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.mode-badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 800; color: var(--brand-ink); background: var(--brand-soft); padding: 5px 12px; border-radius: var(--radius-pill); }
.mode-badge .icon { width: 14px; height: 14px; }
.progress-line { flex: 1; height: 8px; border-radius: var(--radius-pill); background: var(--bg-2); overflow: hidden; }
.progress-line i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--brand), var(--accent)); transition: width .4s var(--ease); }
.quiz-count { font-size: 13px; font-weight: 800; color: var(--ink-3); }

.quiz-prompt { text-align: center; margin: 18px 0 22px; }
.quiz-word { font-size: 44px; font-weight: 900; letter-spacing: -.03em; margin: 0; }
.quiz-ipa { font-family: var(--ds-font-mono); color: var(--ink-3); font-size: 15px; }
.quiz-cn { font-size: 26px; font-weight: 800; margin: 0 0 6px; }
.quiz-sub { font-size: 13.5px; color: var(--ink-3); }

.options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.option {
  display: flex; align-items: center; gap: 10px;
  border: 1.5px solid var(--line-2); border-radius: 14px; padding: 13px 15px;
  background: #fff; font-size: 16px; font-weight: 700; color: var(--ink);
  transition: all .18s var(--ease); text-align: left;
}
.option:hover { border-color: var(--brand-soft-2); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.option .idx { width: 26px; height: 26px; border-radius: 9px; background: var(--bg-2); display: grid; place-items: center; font-size: 12.5px; font-weight: 900; color: var(--ink-3); flex-shrink: 0; }
.option:disabled { cursor: default; }
.option.right { border-color: #34d399; background: var(--green-bg); }
.option.right .idx { background: #10b981; color: #fff; }
.option.wrong { border-color: #f87171; background: var(--red-bg); animation: shake .4s var(--ease); }
.option.wrong .idx { background: #ef4444; color: #fff; }

.spell-input {
  width: min(420px, 100%); margin: 14px auto; display: block; text-align: center;
  font-size: 22px; letter-spacing: .14em; text-transform: lowercase;
  padding: 14px 16px; border: 2px solid var(--line-2); border-radius: 14px; outline: none;
  transition: all var(--dur) var(--ease);
}
.spell-input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--ds-brand-ring); }
.spell-input.ok { border-color: #34d399; background: var(--green-bg); }
.spell-input.no { border-color: #f87171; background: var(--red-bg); }

.feedback { display: none; margin-top: 18px; padding: 16px 18px; border-radius: 16px; }
.feedback.show { display: block; animation: fadeUp .3s var(--ease); }
.feedback.ok { background: var(--green-bg); border: 1px solid #bbf7d0; }
.feedback.no { background: var(--red-bg); border: 1px solid #fecaca; }
.feedback h4 { display: flex; align-items: center; gap: 8px; font-size: 16px; margin: 0 0 6px; }
.feedback h4 .icon { width: 18px; height: 18px; }
.feedback.ok h4 .icon { color: #059669; }
.feedback.no h4 .icon { color: #dc2626; }
.feedback p { margin: 3px 0; font-size: 13.5px; }

.result-ring {
  width: 150px; height: 150px; margin: 0 auto; border-radius: 50%;
  display: grid; place-items: center; position: relative;
  background: conic-gradient(var(--brand) var(--deg, 0deg), var(--bg-2) 0);
}
.result-ring::before { content: ""; position: absolute; inset: 11px; border-radius: 50%; background: #fff; }
.result-ring > div { position: relative; text-align: center; }
.result-ring b { display: block; font-size: 34px; font-weight: 900; line-height: 1.05; }
.result-ring span { font-size: 12px; color: var(--ink-3); }
.verdict { display: inline-block; padding: 5px 14px; border-radius: var(--radius-pill); font-size: 13px; font-weight: 800; }
.verdict.great { background: var(--green-bg); color: #047857; }
.verdict.good { background: var(--sky-bg); color: #0369a1; }
.verdict.soso { background: var(--amber-bg); color: #b45309; }
.verdict.bad { background: var(--red-bg); color: #b91c1c; }

/* ============================= 14. Games ============================ */
.game-hud { display: flex; gap: 12px; justify-content: center; margin-bottom: 16px; flex-wrap: wrap; }
.hud-item {
  min-width: 118px; text-align: center; background: #fff; border: 1px solid var(--line);
  border-radius: 14px; padding: 10px 14px;
}
.hud-item b { display: block; font-size: 20px; font-weight: 900; }
.hud-item small { font-size: 11px; color: var(--ink-3); font-weight: 700; }
.hud-timer.warn { border-color: #fca5a5; background: var(--red-bg); animation: pulse 1s infinite; }
.hud-timer.warn b { color: var(--red); }
.game-stage { min-height: 240px; }
.q-card { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 24px; box-shadow: var(--shadow-card); }

.match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; max-width: 640px; margin: 16px auto 0; }
.match-col { display: flex; flex-direction: column; gap: 9px; }
.match-tile {
  border: 1.5px solid var(--line-2); border-radius: 13px; padding: 12px 14px;
  font-weight: 700; background: #fff; cursor: pointer; transition: all .16s var(--ease);
}
.match-tile:hover { border-color: var(--brand-soft-2); transform: translateY(-1px); }
.match-tile.sel { border-color: var(--brand); background: var(--brand-soft); box-shadow: 0 6px 14px -8px rgba(109,94,252,.5); }
.match-tile.done { background: var(--green-bg); border-color: #6ee7b7; color: #047857; pointer-events: none; }
.form-control { width: 100%; padding: 12px 14px; border: 1.5px solid var(--line-2); border-radius: 12px; font-size: 15px; outline: none; }
.form-control:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--ds-brand-ring); }

/* ============================= 15. Podcast ============================ */
.pod-hero {
  position: relative; overflow: hidden; border-radius: 26px;
  display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 24px;
  background: linear-gradient(120deg, #faf5ff, #fdf4ff 55%, #f5f3ff);
  border: 1px solid #f3e8ff; padding: 26px 30px; margin-bottom: 8px;
}
.pod-hero h1 { font-size: 30px; font-weight: 900; margin: 8px 0 6px; }
.pod-hero img { width: 100%; max-width: 320px; border-radius: 20px; margin-left: auto; box-shadow: var(--shadow-card); }
.pod-hero .pod-cta { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }

.ep-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ep-card {
  background: #fff; border: 1px solid var(--line); border-radius: 22px; overflow: hidden;
  transition: all .26s var(--ease); display: flex; flex-direction: column;
}
.ep-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card); }
.ep-cover { position: relative; height: 140px; overflow: hidden; }
.ep-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.ep-cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(15,23,42,.25)); }
.ep-play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 52px; height: 52px; border-radius: 50%; background: #fff; color: var(--brand);
  display: grid; place-items: center; box-shadow: var(--shadow-pop);
  transition: all var(--dur) var(--ease); z-index: 2;
}
.ep-card:hover .ep-play { transform: translate(-50%, -50%) scale(1.1); }
.ep-play .icon { width: 22px; height: 22px; margin-left: 2px; }
.ep-level { position: absolute; left: 12px; top: 12px; z-index: 2; background: rgba(255,255,255,.92); border-radius: var(--radius-pill); padding: 3px 10px; font-size: 11px; font-weight: 800; color: var(--ink); }
.ep-duration { position: absolute; right: 12px; bottom: 12px; z-index: 2; color: #fff; font-size: 12px; font-weight: 800; text-shadow: 0 1px 4px rgba(0,0,0,.4); display: flex; align-items: center; gap: 4px; }
.ep-duration .icon { width: 13px; height: 13px; }
.ep-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 7px; flex: 1; }
.ep-body h3 { font-size: 15.5px; font-weight: 900; margin: 0; line-height: 1.3; }
.ep-body .ep-meta { font-size: 12px; color: var(--ink-3); }
.ep-bar { height: 6px; border-radius: var(--radius-pill); background: var(--bg-2); overflow: hidden; margin-top: auto; }
.ep-bar i { display: block; height: 100%; background: linear-gradient(90deg, #c026d3, #7c3aed); border-radius: inherit; }

/* audio player mock */
.player {
  display: flex; align-items: center; gap: 16px;
  background: linear-gradient(120deg, #1e1b4b, #4c1d95); color: #fff;
  border-radius: 22px; padding: 18px 22px; box-shadow: 0 16px 34px -10px rgba(76,29,149,.6);
}
.player .p-btn { width: 52px; height: 52px; border-radius: 50%; background: #fff; color: #6d28d9; display: grid; place-items: center; border: none; transition: transform var(--dur) var(--ease); }
.player .p-btn:hover { transform: scale(1.08); }
.player .p-btn .icon { width: 22px; height: 22px; margin-left: 2px; }
.player .p-info { flex: 1; min-width: 0; }
.player .p-info b { display: block; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.player .p-info small { color: rgba(255,255,255,.7); }
.player .p-bar { height: 6px; border-radius: var(--radius-pill); background: rgba(255,255,255,.25); overflow: hidden; margin-top: 8px; }
.player .p-bar i { display: block; height: 100%; width: 35%; background: #fff; border-radius: inherit; }
.player .p-time { font-size: 11.5px; color: rgba(255,255,255,.75); font-family: var(--ds-font-mono); }

/* pipeline strip */
.pipeline-strip { display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; margin: 8px 0; }
.pipe-step { flex: 1; min-width: 130px; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 14px 12px; text-align: center; position: relative; transition: all var(--dur) var(--ease); }
.pipe-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); }
.pipe-step .ps-ico { width: 38px; height: 38px; margin: 0 auto 8px; border-radius: 12px; display: grid; place-items: center; color: #fff; }
.pipe-step .ps-ico .icon { width: 18px; height: 18px; }
.pipe-step b { display: block; font-size: 13.5px; }
.pipe-step small { font-size: 11px; color: var(--ink-3); }
.pipe-arrow { display: flex; align-items: center; color: var(--ink-4); padding: 0 4px; }
.pipe-arrow .icon { width: 16px; height: 16px; }

/* ============================= 16. Auth pages ============================ */
.auth-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: stretch; max-width: 980px; margin: 10px auto 0; }
.auth-card { background: #fff; border: 1px solid var(--line); border-radius: 26px; padding: 34px 36px; box-shadow: var(--shadow-card); }
.auth-card h2 { font-size: 26px; font-weight: 900; margin: 0 0 4px; }
.auth-card > p { color: var(--ink-3); font-size: 14px; margin-bottom: 20px; }
.auth-side {
  background: linear-gradient(160deg, #eef2ff, #f5f3ff 50%, #ecfeff);
  border: 1px solid #e0e7ff; border-radius: 26px; padding: 26px;
  display: flex; flex-direction: column; justify-content: center; gap: 18px;
}
.auth-side img { border-radius: 20px; width: 100%; }
.auth-side .perks { display: grid; gap: 10px; }
.perk { display: flex; align-items: center; gap: 12px; background: rgba(255,255,255,.85); border-radius: 14px; padding: 12px 14px; }
.perk .icon { width: 20px; height: 20px; color: var(--brand); }
.perk b { display: block; font-size: 13.5px; }
.perk span { font-size: 12px; color: var(--ink-3); }
.auth-alt { margin-top: 18px; font-size: 13.5px; color: var(--ink-2); text-align: center; }
.auth-alt a { font-weight: 800; }
.auth-forgot { text-align: right; margin-top: -8px; }
.secure-note { display: flex; align-items: center; gap: 8px; margin-top: 16px; padding: 10px 12px; background: var(--panel-2); border-radius: 12px; font-size: 12.5px; color: var(--ink-3); }
.secure-note .icon { width: 15px; height: 15px; color: var(--brand); }

/* ============================= 17. Tables / progress / profile ============================ */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); padding: 10px 12px; border-bottom: 2px solid var(--line); }
td { padding: 12px; border-bottom: 1px solid var(--line); }

.bar-wrap { background: var(--bg-2); border-radius: var(--radius-pill); height: 10px; overflow: hidden; }
.bar { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--brand), var(--brand-2)); transition: width .8s var(--ease); }
.bar.green { background: linear-gradient(90deg, #10b981, #34d399); }
.bar.amber { background: linear-gradient(90deg, #f59e0b, #fbbf24); }

.admin-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
.admin-stat { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px; }
.admin-stat em { font-style: normal; font-size: 22px; }
.admin-stat b { display: block; font-size: 26px; font-weight: 900; }
.admin-stat span { font-size: 12px; color: var(--ink-3); }
.mini-chart { display: flex; align-items: flex-end; gap: 8px; height: 100px; }
.mini-chart .col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; height: 100%; justify-content: flex-end; }
.mini-chart .bar2 { width: 70%; border-radius: 8px 8px 4px 4px; background: linear-gradient(180deg, #a78bfa, #6d5efc); }
.mini-chart small { font-size: 10px; color: var(--ink-3); }
.tbl-badge { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700; }
.tbl-badge .icon { width: 14px; height: 14px; }

/* ============================= 18. Misc page heroes (v3 compat) ============================ */
.pager { display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; margin-top: 16px; }
.pager a, .pager .cur { display: inline-flex; align-items: center; min-width: 32px; height: 32px; padding: 0 10px; justify-content: center; border-radius: 10px; font-size: 13px; font-weight: 700; color: var(--ink-2); background: #fff; border: 1px solid var(--line); transition: all var(--dur) var(--ease); }
.pager a:hover { border-color: var(--brand-soft-2); color: var(--brand-ink); }
.pager .cur { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; border-color: transparent; }
.pager .info { font-size: 12.5px; color: var(--ink-3); margin-left: 6px; }
.v3-hero {
  position: relative; overflow: hidden;
  border-radius: 26px; padding: 30px 32px; color: #fff;
  background: linear-gradient(120deg, #4f46e5, #6d5efc 50%, #7c3aed);
  box-shadow: 0 16px 38px -12px rgba(109,94,252,.5);
  margin-bottom: 24px;
}
.v3-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(500px 220px at 90% -30%, rgba(255,255,255,.2), transparent 60%),
    radial-gradient(340px 180px at 5% 130%, rgba(34,211,238,.35), transparent 60%);
  pointer-events: none;
}
.v3-hero h1 { color: #fff; font-size: 30px; font-weight: 900; margin: 8px 0 6px; position: relative; }
.v3-hero p { color: rgba(255,255,255,.86); margin: 0; position: relative; max-width: 640px; }
.v3-hero-deco { position: relative; display: flex; gap: 10px; margin-bottom: 14px; }
.v3-deco-orb {
  width: 46px; height: 46px; border-radius: 15px; background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.25); display: grid; place-items: center;
  backdrop-filter: blur(4px);
}
.v3-deco-orb .icon { width: 22px; height: 22px; }
.v3-hero-actions { position: relative; display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.v3-btn-glass { display: inline-flex; align-items: center; gap: 8px; color: #fff; font-weight: 800; font-size: 14px; padding: 11px 20px; border-radius: var(--radius-pill); background: rgba(255,255,255,.2); border: 1px solid rgba(255,255,255,.32); transition: all var(--dur) var(--ease); }
.v3-btn-glass:hover { background: rgba(255,255,255,.32); transform: translateY(-2px); }
.v3-btn-glass .icon { width: 16px; height: 16px; }
.v3-btn-ghost-w { display: inline-flex; align-items: center; gap: 8px; color: #fff; font-weight: 800; font-size: 14px; padding: 11px 20px; border-radius: var(--radius-pill); background: transparent; border: 1px solid rgba(255,255,255,.4); transition: all var(--dur) var(--ease); }
.v3-btn-ghost-w:hover { background: rgba(255,255,255,.14); transform: translateY(-2px); }
.v3-btn-ghost-w .icon { width: 16px; height: 16px; }

/* dark module hero (AI tutor etc.) */
.hero-dark {
  background: linear-gradient(120deg, #0f172a, #1e1b4b 55%, #312e81);
  box-shadow: 0 18px 40px -14px rgba(15,23,42,.7);
}
.hero-dark::before { background: radial-gradient(500px 220px at 90% -30%, rgba(139,92,246,.35), transparent 60%), radial-gradient(340px 180px at 5% 130%, rgba(34,211,238,.18), transparent 60%); }

/* ============================= 19. Animations ============================ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.06); } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }
@keyframes popIn { 0% { opacity: 0; transform: scale(.92); } 60% { transform: scale(1.03); } 100% { opacity: 1; transform: scale(1); } }

.stagger > * { animation: fadeUp .5s var(--ease) both; }
.stagger > *:nth-child(1) { animation-delay: .02s; }
.stagger > *:nth-child(2) { animation-delay: .06s; }
.stagger > *:nth-child(3) { animation-delay: .10s; }
.stagger > *:nth-child(4) { animation-delay: .14s; }
.stagger > *:nth-child(5) { animation-delay: .18s; }
.stagger > *:nth-child(6) { animation-delay: .22s; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ============================= 20. Responsive ============================ */
@media (max-width: 1080px) {
  .stat-grid { grid-template-columns: repeat(3, 1fr); }
  .badge-wall { grid-template-columns: repeat(3, 1fr); }
  .ep-grid, .rec-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  main.container { padding-top: 84px; }
  .land-hero { grid-template-columns: 1fr; padding-top: 24px; }
  .hero-art { order: -1; max-width: 520px; margin: 0 auto; }
  .auth-wrap { grid-template-columns: 1fr; max-width: 560px; }
  .auth-side { display: none; }
  .empty-card { grid-template-columns: 1fr; }
  .empty-card .ec-ill { padding: 14px; }
  .pod-hero { grid-template-columns: 1fr; }
  .pod-hero img { max-width: 260px; margin: 0 auto; }
  .detail-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .ds-nav { display: none; }
  main.container { padding-bottom: 96px; }
  .topbar-inner { height: 58px; }
  .brand-text small { display: none; }
  .hide-sm { display: none; }
  .topbar-right .gam-chip { display: none; }
  .user-chip b { display: none; }
  .tabbar { display: block; }
  .path-grid, .skill-grid, .game-grid { grid-template-columns: 1fr; }
  .setup-grid { grid-template-columns: repeat(2, 1fr); }
  .options { grid-template-columns: 1fr; }
  .word-grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .rec-grid { grid-template-columns: 1fr; }
  .ep-grid { grid-template-columns: 1fr; }
  .admin-grid { grid-template-columns: repeat(2, 1fr); }
  .dash-top { padding: 22px; }
  .dash-tile { min-width: 84px; }
  .continue-card { flex-direction: column; align-items: stretch; }
  .cont-cover { width: 100%; height: 130px; }
  .daily-word { flex-direction: column; align-items: flex-start; }
  .daily-word .speak { margin-left: 0; }
  .auth-card { padding: 26px 22px; }
  .page-head { align-items: flex-start; flex-direction: column; }
  .chart { height: 96px; }
}

@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .path-grid, .skill-grid { grid-template-columns: 1fr; }
  .stat-grid { gap: 8px; }
  .stat-card { padding: 12px; }
  .stat-val { font-size: 20px; }
  .land-hero h1 { font-size: 34px; }
  .hero-actions .btn { flex: 1; }
  .feature-strip { grid-template-columns: 1fr; }
  .badge-wall { grid-template-columns: repeat(3, 1fr); }
  .v3-hero { padding: 24px 20px; }
  .quiz-card { padding: 18px 16px; }
  .setup-grid { grid-template-columns: 1fr; }
  .tabbar a { font-size: 9.5px; }
  .footer { font-size: 12px; }
}