/* ===================== Design tokens ===================== */
:root {
  --color-bg: #F0EDE8;
  --color-fg: #13184A;
  --color-primary: #3A4ED4;
  --color-primary-dark: #2537B8;
  --color-secondary: #25895A;
  --color-secondary-dark: #1A7049;
  --color-accent: #E07A1A;
  --color-accent-dark: #C46A10;
  --color-muted: #E4E0D9;
  --color-muted-fg: #6B6B6B;
  --color-card: #FAFAF7;
  --color-border: #D8D3CC;
  --color-danger: #C04040;
  --color-danger-dark: #B03030;

  --font-display: "Unbounded", sans-serif;
  --font-body: "DM Sans", sans-serif;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;

  --container-width: 1100px;
}

/* ===================== Reset ===================== */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-fg);
  background: var(--color-bg);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===================== Reusable ===================== */
.eyebrow {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-muted-fg);
  margin-bottom: 16px;
}
.eyebrow.small { font-size: 11px; margin-bottom: 8px; }
.eyebrow-light { color: rgba(240,237,232,0.5); }
.tag-blue { color: var(--color-primary); }
.tag-orange { color: var(--color-accent); }
.tag-green { color: var(--color-secondary); }

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-fg);
}
.section-title.text-white { color: var(--color-bg); }

.text-orange { color: var(--color-accent); }
.text-green { color: var(--color-secondary); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 100px;
}
.pill-green {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 11px;
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: 3px 8px;
  border-radius: 6px;
}
.pill-status {
  background: rgba(58,78,212,0.08);
  border: 1px solid rgba(58,78,212,0.2);
  color: var(--color-primary);
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(37,137,90,0.25);
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.01em;
  padding: 12px 24px;
  border-radius: 12px;
  white-space: nowrap;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn-lg { padding: 16px 32px; }
.btn-sm { padding: 8px 14px; font-size: 12px; border-radius: 8px; font-weight: 600; }

.btn-primary { background: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-1px); }

.btn-ghost {
  font-family: var(--font-body);
  font-weight: 500;
  background: rgba(240,237,232,0.08);
  color: rgba(240,237,232,0.8);
  border: 1.5px solid rgba(240,237,232,0.2);
}
.btn-ghost:hover { background: rgba(240,237,232,0.14); }

.btn-green { background: var(--color-secondary); color: var(--color-bg); }
.btn-green:hover { background: var(--color-secondary-dark); transform: translateY(-1px); }

/* ===================== Navbar ===================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(240,237,232,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}
.logo-dot { color: var(--color-accent); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
  justify-content: center;
}
.main-nav a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-primary);
  opacity: 0.7;
  transition: opacity 0.15s ease;
}
.main-nav a:hover { opacity: 1; }

.nav-actions-mobile { display: none; }

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
}
.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  margin: 0 auto;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===================== Hero ===================== */
.hero {
  background: var(--color-primary);
  position: relative;
  overflow: hidden;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding: 60px 0;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(240,237,232,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240,237,232,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.hero-orb-orange {
  top: -120px;
  right: -80px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(224,122,26,0.12) 0%, transparent 70%);
}
.hero-orb-green {
  bottom: -80px;
  left: -60px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(37,137,90,0.18) 0%, transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-bg);
  margin-bottom: 24px;
}
.hero-subtitle {
  font-weight: 400;
  font-size: 0.75em;
  color: rgba(240,237,232,0.6);
}

.hero-text {
  font-size: 17px;
  color: rgba(240,237,232,0.65);
  line-height: 1.65;
  max-width: 440px;
  margin-bottom: 40px;
}

.hero-buttons { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }

.hero-visual { position: relative; height: 440px; }

.task-card {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 300px;
  max-width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.task-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.task-subject { font-family: var(--font-display); font-weight: 700; font-size: 13px; color: var(--color-primary); }

.task-question { font-size: 14px; color: var(--color-primary); line-height: 1.6; margin-bottom: 20px; }
.task-question strong { display: block; font-size: 18px; font-family: var(--font-display); margin-top: 4px; }

.task-options { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.option {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  color: var(--color-primary);
  background: transparent;
}
.option.active { background: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); }

.task-timer { display: flex; justify-content: space-between; margin: 16px 0 6px; font-size: 11px; color: var(--color-muted-fg); }
.timer-value { font-family: var(--font-display); font-weight: 700; color: var(--color-accent); }
.timer-bar { height: 4px; background: var(--color-muted); border-radius: 2px; overflow: hidden; }
.timer-bar span { display: block; height: 100%; background: var(--color-accent); border-radius: 2px; }

.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: 0 4px 24px rgba(58,78,212,0.08);
  font-size: 12px;
}
.floating-badge strong { display: block; font-family: var(--font-display); font-size: 12px; color: var(--color-primary); }
.badge-sub { color: var(--color-muted-fg); font-size: 10px; }
.badge-rank { top: 20px; right: 20px; }
.badge-coins { bottom: 40px; left: 10px; }
.badge-coins .coins-value { color: var(--color-accent); font-size: 13px; }
.badge-solved { top: 100px; left: 0; }
.fb-icon { font-size: 18px; }
.solved-avatar { width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0; }
.stars { display: flex; gap: 2px; color: var(--color-accent); font-size: 10px; margin-top: 2px; }

/* ===================== Stats bar ===================== */
.stats-bar { background: var(--color-secondary); padding: 32px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 32px; text-align: center; }
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: -0.03em;
  color: var(--color-bg);
}
.stat-label { font-size: 13px; color: rgba(240,237,232,0.6); }

/* ===================== Features ===================== */
.features { padding: 96px 0; }
.features .section-title { margin-bottom: 56px; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.feature-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(58,78,212,0.1); }

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.icon-blue { background: rgba(58,78,212,0.06); color: var(--color-primary); }
.icon-orange { background: rgba(224,122,26,0.07); color: var(--color-accent); }
.icon-green { background: rgba(37,137,90,0.07); color: var(--color-secondary); }

.feature-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-fg);
  margin: 8px 0 14px;
}
.feature-card p { font-size: 14px; color: var(--color-muted-fg); line-height: 1.65; margin-bottom: 20px; }

.feature-list { display: flex; flex-direction: column; gap: 8px; }
.feature-list li { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 500; color: var(--color-primary); }
.dot { width: 5px; height: 5px; border-radius: 50%; flex-shrink: 0; }
.dot-blue { background: var(--color-primary); }
.dot-orange { background: var(--color-accent); }
.dot-green { background: var(--color-secondary); }

/* ===================== Leaderboard ===================== */
.rating { background: var(--color-primary); padding: 96px 0; }
.rating-inner { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: start; }
.rating-text { font-size: 15px; color: rgba(240,237,232,0.55); line-height: 1.65; margin: 20px 0 40px; }

.reward-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.reward-card {
  background: rgba(240,237,232,0.06);
  border: 1px solid rgba(240,237,232,0.1);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}
.reward-medal { font-size: 24px; margin-bottom: 2px; }
.reward-place { font-size: 11px; color: rgba(240,237,232,0.5); }
.reward-amount { font-family: var(--font-display); font-weight: 700; font-size: 14px; color: var(--color-accent); }

.leaderboard-card { background: var(--color-card); border-radius: var(--radius-lg); overflow: hidden; }

.tabs {
  display: flex;
  gap: 4px;
  padding: 0 4px;
  border-bottom: 1px solid var(--color-muted);
}
.rating .tabs { background: none; border-radius: 0; width: auto; }
.tab {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-muted-fg);
  padding: 14px 16px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color 0.15s ease;
}
.tab.active { font-weight: 600; color: var(--color-primary); border-bottom-color: var(--color-primary); }

.leaderboard-list { display: flex; flex-direction: column; }
.leaderboard-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-muted);
  transition: background 0.15s ease;
}
.leaderboard-row:last-child { border-bottom: none; }
.leaderboard-row:hover { background: rgba(58,78,212,0.04); }
.leaderboard-row.highlighted { background: rgba(224,122,26,0.06); }
.rank { font-family: var(--font-display); font-weight: 700; font-size: 13px; color: var(--color-muted-fg); width: 20px; text-align: center; flex-shrink: 0; }
.leaderboard-row:nth-child(-n+3) .rank { color: var(--color-accent); }
.lb-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--color-bg);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.lb-info { flex: 1; min-width: 0; }
.lb-info strong { display: block; font-size: 14px; font-weight: 600; color: var(--color-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb-info small { font-size: 11px; color: var(--color-muted-fg); }
.lb-meta { text-align: right; flex-shrink: 0; }
.lb-score { display: block; font-family: var(--font-display); font-weight: 700; font-size: 14px; color: var(--color-primary); }
.lb-coins { display: block; font-size: 11px; color: var(--color-accent); }

.see-all {
  display: block;
  text-align: center;
  padding: 14px 20px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 13px;
  text-decoration: underline;
  text-decoration-color: rgba(58,78,212,0.3);
}

/* ===================== AI trainer ===================== */
.ai-trainer { padding: 96px 0; }
.ai-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.ai-header .section-title { margin-bottom: 0; }

.ai-trainer > .container > .tabs {
  display: inline-flex;
  gap: 4px;
  background: var(--color-muted);
  border-radius: 14px;
  padding: 4px;
  margin-bottom: 32px;
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
  border-bottom: none;
}
.ai-trainer .tab {
  border-radius: 10px;
  border-bottom: none;
  margin-bottom: 0;
  padding: 9px 20px;
}
.ai-trainer .tab.active { background: var(--color-card); box-shadow: 0 1px 4px rgba(0,0,0,0.08); }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fade-in 0.2s ease; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

.ai-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 24px; }

.card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.card h3 { font-family: var(--font-display); font-weight: 700; font-size: 14px; color: var(--color-fg); }
.card-subtitle { font-size: 12px; color: var(--color-muted-fg); margin-top: 4px; }

.battle-history { overflow: hidden; }
.battle-history h3, .battle-history .card-subtitle { padding: 0 24px; }
.battle-history h3 { padding-top: 20px; }
.battle-history .card-subtitle { padding-bottom: 16px; border-bottom: 1px solid var(--color-muted); margin-bottom: 0; }

.ai-side-cards { display: flex; flex-direction: column; gap: 20px; }

.battle-list { display: flex; flex-direction: column; }
.battle-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--color-muted);
  transition: background 0.1s ease;
}
.battle-row:last-child { border-bottom: none; }
.battle-row:hover { background: rgba(58,78,212,0.03); }
.battle-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.battle-icon.win { background: rgba(37,137,90,0.1); }
.battle-icon.loss { background: rgba(220,50,50,0.08); }
.battle-info { flex: 1; font-size: 13px; min-width: 0; }
.battle-info strong { font-weight: 600; font-size: 14px; color: var(--color-fg); }
.battle-info small { color: var(--color-muted-fg); font-size: 12px; }
.tag { font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 5px; }
.tag-win { color: var(--color-secondary); background: rgba(37,137,90,0.1); }
.tag-loss { color: #C04040; background: rgba(200,60,60,0.08); }
.tag-draw { color: var(--color-muted-fg); background: rgba(120,120,120,0.12); }
.battle-score { text-align: right; flex-shrink: 0; }
.battle-score { font-family: var(--font-display); font-weight: 700; font-size: 13px; color: var(--color-accent); }
.battle-score small { display: block; font-family: var(--font-body); font-weight: 400; font-size: 11px; color: var(--color-muted-fg); }

.chart-card, .radar-card { padding: 20px 24px; }
.chart-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.legend { display: flex; gap: 12px; }
.legend-item { display: flex; align-items: center; gap: 5px; font-size: 11px; color: var(--color-muted-fg); }
.legend-dot { width: 8px; height: 8px; border-radius: 2px; display: inline-block; }
.legend-win { background: var(--color-primary); }
.legend-loss { background: var(--color-muted); }

.bar-chart { display: flex; align-items: flex-end; justify-content: space-between; gap: 10px; height: 120px; padding-top: 10px; margin-bottom: 6px; }
.bar-group { display: flex; align-items: flex-end; gap: 3px; height: 100%; flex: 1; position: relative; }
.bar-group span { position: absolute; bottom: -22px; left: 0; right: 0; text-align: center; font-size: 11px; color: var(--color-muted-fg); }
.bar { flex: 1; border-radius: 4px 4px 0 0; min-height: 3px; }
.bar-win { background: var(--color-primary); }
.bar-loss { background: var(--color-muted); }

.radar-card { padding-bottom: 24px; }
.radar-wrap { display: flex; justify-content: center; margin-top: 8px; }
.radar-svg { width: 100%; max-width: 300px; overflow: visible; }
.radar-grid-outer, .radar-grid-inner, .radar-axis { fill: none; stroke: var(--color-muted); stroke-width: 1; }
.radar-shape { fill: rgba(58,78,212,0.2); stroke: var(--color-primary); stroke-width: 2; }
.radar-dot { fill: var(--color-primary); }
.radar-label { font-size: 9.5px; fill: var(--color-muted-fg); font-family: var(--font-body); }

/* ---- AI assistant chat panel ---- */
.assistant-grid { align-items: start; }
.chat-card { display: flex; flex-direction: column; height: 520px; }
.chat-header { display: flex; align-items: center; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--color-muted); }
.chat-header strong { display: block; font-family: var(--font-display); font-size: 13px; font-weight: 700; color: var(--color-fg); }
.chat-status { display: flex; align-items: center; gap: 5px; font-size: 11px; color: var(--color-muted-fg); }
.chat-status .status-dot { width: 6px; height: 6px; box-shadow: none; }

.chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.chat-avatar.small { width: 32px; height: 32px; font-size: 14px; margin-top: 2px; }

.chat-body { flex: 1; overflow-y: auto; padding: 20px; scrollbar-width: thin; }
.chat-row { display: flex; margin-bottom: 12px; }
.chat-row.ai { justify-content: flex-start; }
.chat-bubble {
  max-width: 75%;
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-line;
}
.chat-bubble.ai {
  background: var(--color-card);
  color: var(--color-fg);
  border: 1px solid var(--color-border);
  border-radius: 4px 14px 14px 14px;
}

.chat-typing {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.chat-typing-dots {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 4px 14px 14px 14px;
  padding: 12px 16px;
  display: flex;
  gap: 5px;
  align-items: center;
}
.chat-typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.5;
  animation: pulse 1s infinite;
}
.chat-typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.1); }
}

.chat-input-row { display: flex; gap: 10px; padding: 12px 16px; border-top: 1px solid var(--color-muted); }
.chat-input-row input {
  flex: 1;
  font: inherit;
  font-size: 14px;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--color-bg);
  color: var(--color-fg);
  outline: none;
  transition: border-color 0.15s ease;
}
.chat-input-row input:focus { border-color: var(--color-primary); }
.chat-send {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-primary);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  transition: background 0.15s ease;
}
.chat-send:hover { background: var(--color-primary-dark); }

.quick-questions { padding: 20px; }
.quick-list { display: flex; flex-direction: column; gap: 12px; margin-top: 4px; }
.quick-q {
  text-align: left;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1.5px solid var(--color-border);
  color: var(--color-fg);
  background: var(--color-card);
  transition: all 0.15s ease;
}
.quick-q:hover { border-color: var(--color-primary); background: rgba(58,78,212,0.04); }

.week-summary { background: var(--color-primary); border: none; padding: 20px; }
.week-summary .eyebrow-light { margin-bottom: 14px; }
.summary-list { display: flex; flex-direction: column; }
.summary-list li { display: flex; justify-content: space-between; margin-bottom: 10px; }
.summary-list li:last-child { margin-bottom: 0; }
.summary-list span { font-size: 12px; color: rgba(240,237,232,0.6); }
.summary-list strong { font-family: var(--font-display); font-weight: 700; font-size: 13px; color: var(--color-bg); }

/* ---- Weak areas panel ---- */
.weak-panel { display: flex; flex-direction: column; gap: 20px; }
.weak-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.weak-banner-text { flex: 1; min-width: 220px; }
.weak-banner-text h3 { font-family: var(--font-display); font-weight: 900; font-size: 22px; letter-spacing: -0.02em; color: var(--color-bg); margin: 8px 0; }
.weak-banner-text p { font-size: 14px; color: rgba(240,237,232,0.65); line-height: 1.5; }
.weak-stats { display: flex; gap: 20px; }
.weak-stat { text-align: center; }
.weak-stat strong { display: block; font-family: var(--font-display); font-weight: 900; font-size: 26px; color: var(--color-accent); }
.weak-stat span { font-size: 12px; color: rgba(240,237,232,0.6); }

.weak-list { display: flex; flex-direction: column; gap: 20px; }
.weak-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  transition: box-shadow 0.2s ease;
}
.weak-card:hover { box-shadow: 0 8px 32px rgba(58,78,212,0.1); }

.weak-title-row { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.weak-num {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(58,78,212,0.08);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.weak-title-row h4 { font-family: var(--font-display); font-weight: 700; font-size: 18px; color: var(--color-fg); }
.weak-percent-row { display: flex; align-items: center; gap: 6px; margin-top: 3px; }
.weak-percent { font-family: var(--font-display); font-weight: 700; font-size: 13px; }
.weak-percent.low { color: var(--color-danger); }
.weak-percent.high { color: var(--color-accent); }
.weak-trend { font-size: 11px; font-weight: 600; }
.weak-trend.down { color: var(--color-danger); }
.weak-trend.up { color: var(--color-secondary); }

.progress-track { height: 8px; background: var(--color-muted); border-radius: 4px; margin-bottom: 4px; overflow: hidden; }
.progress-fill { display: block; height: 100%; border-radius: 4px; transition: width 0.8s ease; }
.fill-red { background: linear-gradient(90deg, #C04040, #E05050); }
.fill-orange { background: linear-gradient(90deg, #E07A1A, #F09030); }
.progress-labels { display: flex; justify-content: space-between; margin-bottom: 20px; font-size: 10px; color: var(--color-muted-fg); }

.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag-pill {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-danger-dark);
  background: rgba(192,64,64,0.08);
  border: 1px solid rgba(192,64,64,0.15);
  border-radius: 7px;
  padding: 3px 10px;
}

.weak-ai-box {
  background: rgba(58,78,212,0.04);
  border: 1px solid rgba(58,78,212,0.12);
  border-radius: 14px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.weak-ai-header { display: flex; align-items: center; gap: 8px; font-family: var(--font-display); font-weight: 600; font-size: 12px; color: var(--color-primary); }
.ai-dot {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
}
.weak-ai-box p { font-size: 13px; color: var(--color-fg); line-height: 1.65; flex: 1; }
.link-arrow {
  align-self: flex-start;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  border-radius: 9px;
  padding: 8px 16px;
  transition: all 0.15s ease;
}
.link-arrow:hover { background: var(--color-primary); color: var(--color-bg); }

/* ===================== Find Partner ===================== */
.matching { padding: 96px 0; }
.matching-inner { display: grid; grid-template-columns: 1fr 1.5fr; gap: 64px; align-items: center; }
.matching-text { font-size: 15px; color: var(--color-muted-fg); line-height: 1.65; margin: 20px 0 32px; }

.check-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 32px; }
.check-list li { display: flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 500; color: var(--color-fg); }
.check {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(37,137,90,0.12);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.partner-list { display: flex; flex-direction: column; gap: 16px; }
.partner-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.2s ease;
}
.partner-card:hover { transform: translateX(4px); border-color: var(--color-secondary); }
.partner-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  color: var(--color-bg);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.partner-info { flex: 1; min-width: 0; }
.partner-name-row { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.partner-name-row strong { font-size: 15px; font-weight: 600; color: var(--color-primary); }
.goal-tag { font-size: 11px; color: var(--color-secondary); font-weight: 600; }
.subject-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.subject-tag {
  font-size: 11px;
  font-weight: 500;
  background: rgba(58,78,212,0.07);
  color: var(--color-primary);
  border-radius: 6px;
  padding: 2px 8px;
}

/* ===================== CTA ===================== */
.cta { padding: 96px 0; }
.cta-box {
  background: var(--color-primary);
  border-radius: 28px;
  padding: clamp(40px, 6vw, 72px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-orb { position: absolute; border-radius: 50%; pointer-events: none; }
.cta-orb-orange { right: -40px; top: -40px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(224,122,26,0.15) 0%, transparent 70%); }
.cta-orb-green { left: 40%; bottom: -60px; width: 200px; height: 200px; background: radial-gradient(circle, rgba(37,137,90,0.2) 0%, transparent 70%); }
.cta-text { position: relative; z-index: 1; }
.cta-text .section-title { margin-bottom: 16px; }
.cta-text p { font-size: 15px; color: rgba(240,237,232,0.6); }
.cta > .container > .cta-box > .btn { position: relative; z-index: 1; flex-shrink: 0; }

/* ===================== Footer ===================== */
.site-footer { background: #0F1235; border-top: 1px solid rgba(240,237,232,0.08); padding: 48px 0 32px; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 13px; color: rgba(240,237,232,0.45); line-height: 1.65; }
.footer-col h4 { font-family: var(--font-display); font-size: 11px; font-weight: 600; letter-spacing: 0.12em; color: rgba(240,237,232,0.4); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13px; color: rgba(240,237,232,0.55); padding: 5px 0; transition: color 0.15s ease; }
.footer-col a:hover { color: var(--color-bg); }

.footer-bottom { border-top: 1px solid rgba(240,237,232,0.08); padding-top: 24px; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; font-size: 12px; color: rgba(240,237,232,0.3); padding-bottom: 8px; }

/* ===================== Inner pages ===================== */

/* Nav active state */
.main-nav > a { position: relative; }
.main-nav > a.active { opacity: 1; }
.main-nav > a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -20px;
  height: 2px;
  background: var(--color-primary);
}

/* Page hero (compact intro band, reused across inner pages) */
.page-hero {
  background: var(--color-primary);
  position: relative;
  overflow: hidden;
  padding: 88px 0 64px;
}
.page-hero-inner { position: relative; z-index: 1; max-width: 680px; }
.page-hero-text { font-size: 16px; color: rgba(240,237,232,0.65); line-height: 1.65; max-width: 600px; margin-top: 16px; }
.page-hero-stats { display: flex; gap: 32px; margin-top: 32px; flex-wrap: wrap; }
.page-hero-stat strong { display: block; font-family: var(--font-display); font-weight: 900; font-size: 22px; color: var(--color-bg); letter-spacing: -0.02em; }
.page-hero-stat span { font-size: 12px; color: rgba(240,237,232,0.6); }

.section-pad { padding: 96px 0; }
.section-pad.tight { padding: 64px 0; }

/* Standalone filter tabs (games / teams catalogs) */
.filter-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  background: var(--color-muted);
  border-radius: 14px;
  padding: 4px;
  margin: 32px 0 40px;
}
.filter-tab {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-muted-fg);
  padding: 9px 18px;
  border-radius: 10px;
  white-space: nowrap;
  transition: all 0.15s ease;
}
.filter-tab.active { background: var(--color-card); color: var(--color-fg); font-weight: 600; box-shadow: 0 1px 4px rgba(0,0,0,0.08); }

/* Games catalog */
.game-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.game-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.game-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(58,78,212,0.1); }
.game-icon { width: 48px; height: 48px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 22px; }
.game-subject { font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.game-card h3 { font-family: var(--font-display); font-weight: 700; font-size: 18px; color: var(--color-fg); line-height: 1.25; }
.game-card p { font-size: 13.5px; color: var(--color-muted-fg); line-height: 1.6; flex: 1; }
.game-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--color-muted-fg); padding-top: 12px; border-top: 1px solid var(--color-muted); }
.game-meta .difficulty { color: var(--color-accent); letter-spacing: 1px; }
.game-card .btn { align-self: flex-start; margin-top: 4px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; pointer-events: none; transform: none; }
.preview-pill { display: flex; width: fit-content; margin-top: 20px; }

/* Your rank card (rating page) */
.your-rank-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.your-rank-left { display: flex; align-items: center; gap: 18px; }
.your-rank-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(240,237,232,0.15);
  border: 2px solid rgba(240,237,232,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--color-bg);
  flex-shrink: 0;
}
.your-rank-name { font-family: var(--font-display); font-weight: 700; font-size: 16px; color: var(--color-bg); }
.your-rank-sub { font-size: 12px; color: rgba(240,237,232,0.6); margin-top: 2px; }
.your-rank-stats { display: flex; gap: 28px; }
.your-rank-stat { text-align: center; }
.your-rank-stat strong { display: block; font-family: var(--font-display); font-weight: 900; font-size: 22px; color: var(--color-accent); }
.your-rank-stat span { font-size: 11px; color: rgba(240,237,232,0.6); }

.leaderboard-card.full { max-width: none; }
.leaderboard-row .rank-medal { font-size: 16px; width: 20px; text-align: center; flex-shrink: 0; }

/* About page */
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.story-text p { font-size: 15px; color: var(--color-muted-fg); line-height: 1.7; margin-bottom: 16px; }
.story-text p:last-child { margin-bottom: 0; }
.story-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.story-card-row { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--color-muted); }
.story-card-row:last-child { border-bottom: none; padding-bottom: 0; }
.story-card-row span { font-size: 13px; color: var(--color-muted-fg); }
.story-card-row strong { font-family: var(--font-display); font-weight: 700; font-size: 16px; color: var(--color-primary); }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.team-member { text-align: center; }
.avatar-lg { width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 14px; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 700; font-size: 24px; color: var(--color-bg); }
.team-member strong { display: block; font-family: var(--font-display); font-weight: 700; font-size: 15px; color: var(--color-fg); margin-bottom: 2px; }
.team-member span { font-size: 12px; color: var(--color-muted-fg); }

.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* Empty list placeholder */
.empty-state { color: var(--color-muted-fg); font-size: 14px; padding: 32px; text-align: center; }

/* ===================== Responsive ===================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; height: 380px; max-width: 420px; margin: 0 auto; }
  .hero-content { text-align: center; }
  .hero-buttons { justify-content: center; }
  .hero-text { margin-left: auto; margin-right: auto; }

  .rating-inner { grid-template-columns: 1fr; gap: 48px; }
  .rating-content { text-align: center; }
  .rating-text { margin-left: auto; margin-right: auto; }
  .reward-cards { max-width: 460px; margin: 0 auto; }

  .ai-grid { grid-template-columns: 1fr; }
  .weak-card { grid-template-columns: 1fr; }
  .weak-banner { text-align: center; justify-content: center; }
  .weak-stats { justify-content: center; }

  .matching-inner { grid-template-columns: 1fr; gap: 48px; }
  .matching-content { text-align: center; }
  .matching-text { margin-left: auto; margin-right: auto; }
  .check-list { max-width: 340px; margin-left: auto; margin-right: auto; }

  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }

  .game-grid { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: 1fr; }
  .your-rank-card { justify-content: center; text-align: center; }
  .your-rank-stats { justify-content: center; }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 16px 24px 24px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .main-nav.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .main-nav a { padding: 10px 0; width: 100%; opacity: 1; }
  .main-nav > a.active::after { left: 0; right: auto; bottom: 8px; width: 20px; }
  .nav-actions-mobile { display: flex; gap: 12px; margin-top: 12px; width: 100%; }
  .nav-actions-mobile .btn { flex: 1; }

  .header-actions { display: none; }
  .burger { display: flex; }

  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 16px; }

  .cta-box { flex-direction: column; text-align: center; }

  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .container { padding: 0 20px; }
  .hero { padding: 40px 0 56px; min-height: auto; }
  .hero-visual { display: none; }

  .leaderboard-row { flex-wrap: wrap; }
  .lb-coins { display: none; }

  .partner-card { flex-wrap: wrap; }
  .partner-info { flex-basis: 100%; order: 1; }
  .partner-card .btn { order: 3; margin-left: auto; }

  .btn-lg { width: 100%; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; }

  .stats-grid { grid-template-columns: 1fr 1fr; }

  .cta-box { padding: 32px 24px; }

  .weak-banner { flex-direction: column; align-items: stretch; }

  .game-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .your-rank-left { flex-direction: column; }
  .your-rank-stats { gap: 18px; }
}

/* ===================== MVP PvP round feedback ===================== */

.task-options .option {
  transition: transform .12s ease, background .15s ease, border-color .15s ease;
}

/* ============ PROMO VIDEO ============ */
.promo { padding: 96px 0 0; }
.promo-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; margin-bottom: 40px; }
/* Header wordmark set inline in a section title, scaled to the title's font size */
.title-logo.logo-text { font-size: 1em; font-weight: 700; line-height: inherit; white-space: nowrap; }
.promo-text { max-width: 380px; color: var(--color-muted-fg); font-size: 15px; line-height: 1.65; }

.promo-player {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-primary);
  box-shadow: 0 30px 80px rgba(58,78,212,0.22);
  outline: none;
}
.promo-player:fullscreen { border-radius: 0; box-shadow: none; }
.promo-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: var(--color-primary); cursor: pointer; }

/* "Turn sound on" hint, shown while the autoplaying video is muted */
.promo-unmute {
  position: absolute; top: 16px; right: 16px; z-index: 3;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 100px;
  font-family: var(--font-body); font-size: 13px; font-weight: 600; color: var(--color-bg);
  background: rgba(19,24,74,0.55); border: 1px solid rgba(240,237,232,0.16);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  opacity: 0; transform: translateY(-6px); pointer-events: none;
  transition: opacity .25s ease, transform .25s ease, background .15s;
}
.promo-player.is-muted .promo-unmute { opacity: 1; transform: none; pointer-events: auto; }
.promo-unmute:hover { background: rgba(19,24,74,0.75); }
.promo-unmute:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* Controls */
.promo-controls {
  position: absolute; left: 16px; right: 16px; bottom: 16px; z-index: 3;
  display: flex; align-items: center; gap: 14px;
  padding: 8px 12px 8px 8px;
  border-radius: var(--radius-md);
  background: rgba(19,24,74,0.55);
  border: 1px solid rgba(240,237,232,0.12);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  color: var(--color-bg);
  transition: opacity .25s ease, transform .25s ease;
}
.promo-player.is-playing.is-idle .promo-controls { opacity: 0; transform: translateY(8px); pointer-events: none; }
.promo-player.is-playing.is-idle { cursor: none; }

.pc-btn {
  flex-shrink: 0; width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-accent); color: var(--color-bg);
  transition: transform .15s, background .15s;
}
.pc-btn:hover { transform: scale(1.06); }
.pc-btn.pc-ghost { background: transparent; color: rgba(240,237,232,0.8); border-radius: var(--radius-sm); }
.pc-btn.pc-ghost:hover { background: rgba(240,237,232,0.1); color: var(--color-bg); transform: none; }
.pc-btn:focus-visible, .pc-progress:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.pc-play .i-play { margin-left: 2px; }
.pc-play .i-play, .promo-player.is-playing .pc-play .i-pause { display: block; }
.pc-play .i-pause, .promo-player.is-playing .pc-play .i-play { display: none; }
.pc-mute .i-muted, .promo-player.is-muted .pc-mute .i-sound { display: none; }
.promo-player.is-muted .pc-mute .i-muted { display: block; }

.pc-time { flex-shrink: 0; font-family: var(--font-display); font-size: 12px; font-weight: 600; font-variant-numeric: tabular-nums; min-width: 34px; }
.pc-duration { color: rgba(240,237,232,0.55); text-align: right; }

.pc-progress { position: relative; flex: 1; height: 24px; display: flex; align-items: center; cursor: pointer; touch-action: none; border-radius: 4px; }
.pc-track { position: relative; width: 100%; height: 4px; border-radius: 2px; background: rgba(240,237,232,0.2); overflow: hidden; transition: height .15s; }
.pc-buffer, .pc-fill { position: absolute; left: 0; top: 0; bottom: 0; width: 0; border-radius: 2px; }
.pc-buffer { background: rgba(240,237,232,0.25); }
.pc-fill { background: var(--color-accent); }
.pc-knob {
  position: absolute; left: 0; top: 50%; width: 14px; height: 14px; margin: -7px 0 0 -7px; border-radius: 50%;
  background: var(--color-bg); box-shadow: 0 0 0 3px var(--color-accent);
  transform: scale(0); transition: transform .15s;
}
.pc-progress:hover .pc-track, .pc-progress.is-dragging .pc-track { height: 6px; }
.pc-progress:hover .pc-knob, .pc-progress.is-dragging .pc-knob, .pc-progress:focus-visible .pc-knob { transform: scale(1); }

/* ===================== Signup ===================== */
.subjects { padding: 0 0 96px; }
.subjects .section-title { margin-bottom: 40px; }
.subjects .feature-card h3 { margin-top: 0; }
.subjects .feature-card p { color: var(--color-muted-fg); font-size: 15px; line-height: 1.6; margin-bottom: 0; }

.faq { padding: 0 0 32px; }
.faq .section-title { margin-bottom: 32px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; width: 100%; }
.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 22px;
}
.faq-item summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  padding: 18px 28px 18px 0;
  list-style: none;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '';
  position: absolute;
  right: 4px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: translateY(-70%) rotate(45deg);
}
.faq-item[open] summary::after { transform: translateY(-20%) rotate(225deg); }
.faq-item p {
  padding-bottom: 18px;
  color: var(--color-muted-fg);
  font-size: 15px;
  line-height: 1.6;
  max-width: 62ch;
}

.signup { padding: 96px 0 112px; }
.signup-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.signup-lead p {
  margin-top: 16px;
  max-width: 420px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-muted-fg);
}
.signup-card,
.signup-success {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.signup-card { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > span { font-size: 13px; font-weight: 600; color: var(--color-fg); }
.field input,
.field select {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--color-fg);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.field select {
  appearance: none;
  padding-right: 36px;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--color-primary) 50%),
    linear-gradient(135deg, var(--color-primary) 50%, transparent 50%);
  background-position: calc(100% - 18px) 18px, calc(100% - 12px) 18px;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.field input:focus,
.field select:focus { outline: none; border-color: var(--color-primary); }
.field input::placeholder { color: var(--color-muted-fg); }
.field.is-invalid input,
.field.is-invalid select { border-color: var(--color-danger); }
.field-error { min-height: 16px; font-size: 12px; color: var(--color-danger); }
.form-error { font-size: 13px; color: var(--color-danger); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.signup-card .btn { width: 100%; }
.signup-note { font-size: 12px; color: var(--color-muted-fg); }
.signup-success h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.signup-success p { font-size: 15px; color: var(--color-muted-fg); line-height: 1.6; }
.signup-success strong { color: var(--color-fg); font-weight: 600; }

@media (max-width: 1024px) {
  .signup-inner { grid-template-columns: 1fr; gap: 40px; }
  .signup-lead p { max-width: none; }
}

@media (max-width: 860px) {
  .promo { padding-top: 64px; }
  .promo-head { flex-direction: column; align-items: flex-start; gap: 16px; }
}
@media (max-width: 560px) {
  .promo-player { border-radius: var(--radius-md); }
  .promo-unmute { top: 8px; right: 8px; padding: 6px 12px; font-size: 12px; }
  .promo-controls { left: 8px; right: 8px; bottom: 8px; gap: 8px; padding: 4px 6px 4px 4px; }
  .pc-btn { width: 30px; height: 30px; }
  .pc-duration, .pc-mute { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .promo-unmute, .promo-controls, .pc-knob, .pc-track { transition: none; }
}