:root {
  --bg: #0c0f12;
  --panel: #151a21;
  --text: #dbe3ec;
  --muted: #9aa6b2;
  --accent: #3aa675;
  --warn: #e6b800;
  --danger: #e05d5d;
  --border: #222933;
  --border-light: #1e2530;
  --input-bg: #0f1318;
  --input-border: #2a3442;
  --button-bg: #233041;
  --button-border: #2f3e52;
  --button-hover: #2a3a4e;
  --card-bg: #0f1318;
  --card-border: #2a3442;
  --table-bg: #10151b;
  --player-bg: #0e1318;
  --banner-bg: #142230;
  --banner-border: #213146;
  --banner-text: #cfe9da;
  --active-border: #ffd36e;
  --active-shadow: rgba(255, 211, 110, 0.25);
  --blackjack-glow: rgba(58,166,117,0.6);
  --betting-bg: #122019;
  --betting-text: #cbe7d8;
  --insurance-bg: #211f12;
  --insurance-text: #f2e6b3;
  --toast-bg: #142230;
  --toast-border: #213146;
}

[data-theme="light"] {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --text: #1a202c;
  --muted: #64748b;
  --accent: #2d8659;
  --warn: #b38f00;
  --danger: #c53030;
  --border: #e2e8f0;
  --border-light: #cbd5e1;
  --input-bg: #ffffff;
  --input-border: #cbd5e1;
  --button-bg: #e2e8f0;
  --button-border: #cbd5e1;
  --button-hover: #cbd5e1;
  --card-bg: #ffffff;
  --card-border: #cbd5e1;
  --table-bg: #f8fafc;
  --player-bg: #ffffff;
  --banner-bg: #dbeafe;
  --banner-border: #93c5fd;
  --banner-text: #1e3a5f;
  --active-border: #fbbf24;
  --active-shadow: rgba(251, 191, 36, 0.25);
  --blackjack-glow: rgba(45, 134, 89, 0.4);
  --betting-bg: #d1fae5;
  --betting-text: #065f46;
  --insurance-bg: #fef3c7;
  --insurance-text: #78350f;
  --toast-bg: #ffffff;
  --toast-border: #cbd5e1;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
}
.app-header { padding: 16px 20px; border-bottom: 1px solid var(--border); }
.app-header h1 { margin: 0; font-weight: 700; font-size: 20px; }
.app-header .sub { color: var(--muted); margin-top: 4px; font-size: 12px; }

.controls { padding: 16px 20px; }
.control-group { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 12px; }
.control-group label { display: inline-flex; align-items: center; gap: 8px; background: var(--panel); border: 1px solid var(--border-light); border-radius: 8px; padding: 8px 10px; }
.control-group select, .control-group input { background: var(--input-bg); color: var(--text); border: 1px solid var(--input-border); border-radius: 6px; padding: 6px 8px; }
.control-group button { background: var(--button-bg); color: var(--text); border: 1px solid var(--button-border); border-radius: 8px; padding: 8px 12px; cursor: pointer; }
.control-group button:hover { background: var(--button-hover); }
.control-group button, .action-bar button { min-height: 44px; }
.game { padding: 0 20px 16px; }
.section-title { margin: 0 0 8px 0; font-size: 16px; color: var(--muted); }
.game-controls { margin-bottom: 8px; }
.seat-picker { gap: 8px; }
.seat-picker label { padding: 4px 8px; }
.seat-picker input[type="checkbox"] { transform: translateY(1px); }
.status-bar { display: flex; gap: 16px; align-items: center; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.banner { display: flex; justify-content: space-between; align-items: center; gap: 12px; background: var(--banner-bg); border: 1px solid var(--banner-border); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; }
.banner .banner-text { color: var(--banner-text); font-weight: 600; }
.banner .banner-actions button { background: var(--button-bg); color: var(--text); border: 1px solid var(--button-border); border-radius: 8px; padding: 6px 10px; cursor: pointer; }
.banner .banner-actions button:hover { background: var(--button-hover); }
.banner-form { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
#ins-seat-list { display: flex; gap: 8px; flex-wrap: wrap; }
#ins-seat-list label { background: var(--input-bg); border: 1px solid var(--button-bg); padding: 4px 8px; border-radius: 6px; }
.visually-hidden { position: absolute !important; height: 1px; width: 1px; overflow: hidden; clip: rect(1px, 1px, 1px, 1px); white-space: nowrap; }
.table { border: 1px solid var(--border-light); border-radius: 10px; background: var(--table-bg); padding: 10px; }
.dealer { border-bottom: 1px dashed var(--border-light); padding-bottom: 8px; margin-bottom: 8px; }
.dealer .label { color: var(--muted); font-weight: 600; margin-bottom: 6px; }
.players { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 10px; }
.player-hand { background: var(--player-bg); border: 1px solid var(--border-light); border-radius: 8px; padding: 8px; position: relative; }
.player-hand.active-hand { border-color: var(--active-border); box-shadow: 0 0 0 2px var(--active-shadow); }
.player-hand.blackjack-win { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(58, 166, 117, 0.35), 0 0 18px var(--blackjack-glow); animation: bj-pulse 800ms ease-in-out 3; }
.bj-badge { position: absolute; top: 6px; right: 6px; background: var(--betting-bg); color: var(--betting-text); border: 1px solid var(--accent); border-radius: 999px; padding: 2px 8px; font-weight: 800; letter-spacing: 0.5px; }
@keyframes bj-pulse { 0% { transform: scale(1); } 50% { transform: scale(1.03); } 100% { transform: scale(1); } }
.player-title { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; color: var(--muted); }
.player-title .active { color: var(--banner-text); }
.bet-tag { background: var(--table-bg); padding: 2px 6px; border-radius: 6px; border: 1px solid var(--button-border); color: var(--text); }
.cards .card { width: 36px; height: 52px; border-radius: 6px; border: 1px solid var(--card-border); background: var(--card-bg); display: inline-flex; align-items: center; justify-content: center; color: var(--text); font-weight: 700; }
.cards .card + .card { margin-left: 6px; }
.action-bar { display: flex; gap: 8px; align-items: center; padding: 10px 0; }
.action-bar button { background: var(--button-bg); color: var(--text); border: 1px solid var(--button-border); border-radius: 8px; padding: 8px 12px; cursor: pointer; }
.action-bar button[disabled] { opacity: 0.5; cursor: not-allowed; }
.hint-suggest { outline: 2px solid var(--active-border); }

/* Focus visibility for accessibility */
button:focus-visible, select:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

.betting, .insurance { margin: 8px 0; padding: 8px 10px; border-left: 3px solid var(--accent); background: var(--betting-bg); border-radius: 6px; color: var(--betting-text); }
.insurance { border-left-color: var(--warn); background: var(--insurance-bg); color: var(--insurance-text); }

.hands { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; padding: 0 20px 24px; }
.hand { background: var(--panel); border: 1px solid var(--border-light); border-radius: 10px; overflow: hidden; }
.hand-header { padding: 10px 12px; font-weight: 600; border-bottom: 1px solid var(--border-light); background: var(--table-bg); }
.cards { padding: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.card-select { display: inline-flex; align-items: center; gap: 6px; padding: 6px 8px; background: var(--table-bg); border: 1px solid var(--button-bg); border-radius: 8px; }
.card-select .rank { background: var(--input-bg); color: var(--text); border: 1px solid var(--input-border); border-radius: 6px; padding: 6px 8px; }
.card-select button { background: transparent; color: var(--muted); border: none; cursor: pointer; padding: 0 4px; font-size: 16px; }
.card-select button:hover { color: var(--danger); }
.hand-actions { padding: 0 12px 12px; display: flex; gap: 10px; align-items: center; }
.result { padding: 10px 12px; border-top: 1px solid var(--border-light); font-size: 14px; }

.round-summary { background: var(--player-bg); border: 1px solid var(--border-light); border-radius: 8px; padding: 10px; margin-top: 10px; }
.round-summary .title { font-weight: 700; color: var(--text); margin-bottom: 6px; }
.summary-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 8px; }
.summary-item { background: var(--input-bg); border: 1px solid var(--button-bg); border-radius: 6px; padding: 8px; }
.summary-item.win { border-color: var(--accent); }
.summary-item.lose { border-color: var(--danger); }
.summary-item.push { border-color: var(--muted); }
.summary-item .delta { font-weight: 700; }

.toasts { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 6px; z-index: 1000; }
.toast { background: var(--toast-bg); color: var(--text); border: 1px solid var(--toast-border); border-radius: 8px; padding: 8px 10px; box-shadow: 0 2px 8px rgba(0,0,0,0.2); opacity: 0.96; }

.action {
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--button-border);
  background: var(--input-bg);
}
.action.HIT { color: #f1f1f1; }
.action.STAND { color: #7fd1a0; }
.action.DOUBLE { color: #80bfff; }
.action.SPLIT { color: #f7b267; }
.action.SURRENDER { color: #e05d5d; }

.hint { color: var(--muted); }
.deviation { color: #ffd36e; font-weight: 600; }
.why { color: #c3d4e3; }
.small { font-size: 12px; color: var(--muted); }
.app-footer { padding: 12px 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; }

/* Theme toggle */
.theme-toggle { position: fixed; top: 16px; right: 16px; background: var(--button-bg); color: var(--text); border: 1px solid var(--button-border); border-radius: 50%; width: 40px; height: 40px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 18px; z-index: 1000; transition: transform 0.2s ease; }
.theme-toggle:hover { background: var(--button-hover); transform: scale(1.05); }
.theme-toggle:active { transform: scale(0.95); }