:root {
  --bg: #14171c;
  --bg-raised: #1c2026;
  --border: #2b303a;
  --text: #e7e9ee;
  --text-dim: #9aa3af;
  --accent: #4caf7d;
  --accent-hover: #5fc491;
  --danger: #e0665f;
  --warning: #d9a441;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-raised);
}

.brand {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}
.brand span { color: var(--accent); }

.site-header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-user { color: var(--text-dim); font-size: 0.9rem; }

.btn-accent {
  background: var(--accent);
  color: #0c1310;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  border: none;
  cursor: pointer;
}
.btn-accent:hover { background: var(--accent-hover); color: #0c1310; }
.btn-large { padding: 0.8rem 1.6rem; font-size: 1.05rem; display: inline-block; }
.full-width { width: 100%; }

.link-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font: inherit;
  padding: 0;
}
.link-btn:hover { color: var(--text); }
.inline-form { display: inline; }

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.verify-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  background: rgba(217, 164, 65, 0.12);
  border-bottom: 1px solid var(--warning);
  color: var(--warning);
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  text-align: center;
}
.verify-banner .link-btn { color: var(--warning); text-decoration: underline; }

.flash-container { margin-bottom: 1.5rem; }
.flash {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}
.flash-danger { background: rgba(224, 102, 95, 0.15); color: var(--danger); border: 1px solid var(--danger); }
.flash-success { background: rgba(76, 175, 125, 0.15); color: var(--accent); border: 1px solid var(--accent); }
.flash-warning { background: rgba(217, 164, 65, 0.15); color: var(--warning); border: 1px solid var(--warning); }

.auth-card {
  max-width: 380px;
  margin: 2rem auto;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
}
.auth-card h1 { margin-top: 0; font-size: 1.4rem; }
.auth-card form { display: flex; flex-direction: column; gap: 1rem; }
.auth-card label { display: flex; flex-direction: column; gap: 0.4rem; font-size: 0.9rem; color: var(--text-dim); }
.auth-card input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.7rem;
  color: var(--text);
  font-size: 1rem;
}
.auth-card input:focus { outline: 1px solid var(--accent); }
.auth-switch { text-align: center; margin-top: 1rem; font-size: 0.9rem; color: var(--text-dim); }

.lobby-layout {
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
  padding: 2rem 0;
}
.lobby-board-wrap {
  width: min(420px, 92vw);
  flex-shrink: 0;
}
.lobby-board-wrap .cg-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
}
.lobby-hero {
  text-align: center;
  max-width: 480px;
}
.lobby-hero h1 { font-size: 1.8rem; margin-bottom: 0.5rem; }
.lobby-hero p { color: var(--text-dim); font-size: 1.05rem; margin-bottom: 1.5rem; }
.coming-soon { color: var(--text-dim); font-style: italic; }

.seek-panel {
  max-width: 480px;
  margin: 0 auto;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}
.seek-panel h2 { margin-top: 0; font-size: 1.1rem; }
.tc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}
.tc-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.7rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
}
.tc-btn:hover { border-color: var(--accent); }
.tc-btn.active { background: var(--accent); color: #0c1310; border-color: var(--accent); font-weight: 600; }
.seek-status { margin-top: 1rem; color: var(--text-dim); min-height: 1.2em; }

.hidden { display: none !important; }

.friend-panel, .bot-panel { margin-top: 1.5rem; }

.custom-tc {
  display: flex;
  align-items: flex-end;
  gap: 0.8rem;
  margin-top: 0.8rem;
}
.custom-tc label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.custom-tc input[type="number"] {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem;
  color: var(--text);
  width: 5rem;
}
.custom-tc button { white-space: nowrap; }

.friend-result {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.friend-result input {
  flex: 1;
  min-width: 180px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem;
  color: var(--text);
}
.friend-result button {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.5rem 0.8rem;
  cursor: pointer;
}

.board-page {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
}
.board-wrap {
  width: min(560px, 92vw);
}
.cg-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  position: relative;
}
.side-panel {
  width: 260px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.player-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 1rem;
}
.clock {
  font-variant-numeric: tabular-nums;
  font-size: 1.4rem;
  font-weight: 700;
}
.clock.low { color: var(--danger); }
.clock.stopped { color: var(--text-dim); }
.game-status {
  text-align: center;
  padding: 0.8rem;
  border-radius: 8px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  min-height: 1.2em;
}
.game-actions {
  display: flex;
  gap: 0.6rem;
}
.game-actions button {
  flex: 1;
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  cursor: pointer;
}
.game-actions button:hover { border-color: var(--accent); }
.game-actions button.danger:hover { border-color: var(--danger); color: var(--danger); }

.waiting-room {
  width: 100%;
  text-align: center;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.5rem;
  margin-bottom: 0.5rem;
}
.waiting-room p { margin: 0 0 0.6rem; color: var(--text-dim); }

.promo-picker {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  gap: 0.5rem;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  z-index: 100;
}
.promo-picker.hidden { display: none; }
.promo-picker button {
  width: 3rem;
  height: 3rem;
  font-size: 1.2rem;
  font-weight: 700;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}
.promo-picker button:hover { background: var(--accent); color: #0c1310; }

.profile-header { text-align: center; margin-bottom: 1.5rem; }
.profile-stats { color: var(--text-dim); }
.games-table {
  width: 100%;
  border-collapse: collapse;
}
.games-table th, .games-table td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.games-table th { color: var(--text-dim); font-weight: 600; font-size: 0.85rem; }
.result-win { color: var(--accent); }
.result-loss { color: var(--danger); }
.result-draw { color: var(--text-dim); }

.analysis-page { display: flex; gap: 2rem; align-items: flex-start; justify-content: center; flex-wrap: wrap; }
.eval-bar-wrap {
  width: 28px;
  height: min(560px, 92vw);
  background: #2b2b2b;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  flex-direction: column-reverse;
  border: 1px solid var(--border);
}
.eval-bar-white { background: #e9e9e9; width: 100%; transition: height 0.2s; }
.eval-text { text-align: center; margin-top: 0.5rem; font-weight: 700; }
.move-list { display: flex; flex-wrap: wrap; gap: 0.3rem; max-height: 200px; overflow-y: auto; }
.move-list button {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}
.move-list button.current { background: var(--accent); color: #0c1310; }
.move-list button.best-move { border-color: #d4af37; color: #d4af37; }
.move-list button.best-move.current { background: #d4af37; color: #0c1310; }
.analysis-progress { color: var(--text-dim); font-size: 0.9rem; }

.brilliant-badge {
  text-align: center;
  color: #d4af37;
  font-weight: 700;
  margin-top: 0.4rem;
}
.brilliant-badge.pulse { animation: brilliant-pop 0.5s ease-out; }
@keyframes brilliant-pop {
  0% { transform: scale(0.6); opacity: 0; }
  60% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.table-responsive { width: 100%; overflow-x: auto; }

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.lesson-card {
  display: block;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.2rem;
  color: var(--text);
}
.lesson-card:hover { border-color: var(--accent); }
.lesson-card h2 { margin: 0 0 0.5rem; font-size: 1.1rem; color: var(--accent); }
.lesson-card p { margin: 0; color: var(--text-dim); font-size: 0.9rem; }

.lesson-title { font-size: 1.3rem; margin-bottom: 0.3rem; }
.lesson-intro { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 1rem; }
.lesson-done { color: var(--accent); font-weight: 600; margin: 0.5rem 0; }

.level-row { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 1rem; }
.level-row input[type="range"] { flex: 1; }
.level-row span { color: var(--text-dim); min-width: 1.5em; text-align: center; }

@media (max-width: 700px) {
  .site-header { flex-wrap: wrap; gap: 0.6rem; padding: 0.8rem 1rem; }
  .site-header nav { flex-wrap: wrap; gap: 0.6rem; }
  main { padding: 1.25rem 0.8rem; }
  .board-page, .analysis-page { flex-direction: column; align-items: center; gap: 1rem; }
  .side-panel { width: 100%; max-width: 480px; }
  .board-wrap { width: min(480px, 96vw); }
  .tc-grid { grid-template-columns: repeat(2, 1fr); }
  .lobby-hero h1 { font-size: 1.5rem; }
  .lobby-hero p { font-size: 1rem; }
  .games-table th, .games-table td { padding: 0.5rem; font-size: 0.85rem; }
  .eval-bar-wrap { height: 16px; width: min(480px, 96vw); flex-direction: row; }
  .eval-bar-white { height: 100%; width: 50%; }
}