:root {
  color-scheme: dark;
  --bg: #0c0812;
  --panel: rgba(255, 255, 255, 0.075);
  --panel-2: rgba(255, 255, 255, 0.12);
  --text: #f6edf9;
  --muted: #b9a9c6;
  --accent: #d7a8ff;
  --accent-2: #7de5d1;
  --danger: #ff9db3;
  --border: rgba(255, 255, 255, 0.16);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(136, 74, 255, 0.35), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(30, 203, 178, 0.20), transparent 28rem),
    var(--bg);
}
.shell { width: min(1120px, 100%); margin: 0 auto; padding: 24px; }
.hero { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.eyebrow { color: var(--accent-2); text-transform: uppercase; letter-spacing: 0.14em; font-size: 12px; margin: 0 0 8px; }
h1 { margin: 0; font-size: clamp(34px, 7vw, 72px); line-height: 0.95; }
.sub { color: var(--muted); max-width: 620px; line-height: 1.5; }
.panel { border: 1px solid var(--border); background: var(--panel); backdrop-filter: blur(18px); border-radius: 24px; padding: 18px; box-shadow: 0 24px 80px rgba(0,0,0,.28); }
.controls { display: grid; gap: 12px; }
label { color: var(--muted); font-size: 13px; font-weight: 700; }
input, textarea, select { width: 100%; border: 1px solid var(--border); background: rgba(0,0,0,.22); color: var(--text); border-radius: 14px; padding: 13px 14px; font: inherit; outline: none; }
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(215,168,255,.13); }
.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
button { font: inherit; color: inherit; }
.mode, .ghost, .primary { border: 1px solid var(--border); border-radius: 16px; cursor: pointer; }
.mode { background: rgba(255,255,255,.055); padding: 13px; text-align: left; font-weight: 800; }
.mode span { color: var(--muted); font-size: 12px; font-weight: 600; }
.mode.active { border-color: var(--accent); background: linear-gradient(135deg, rgba(215,168,255,.26), rgba(125,229,209,.10)); }
.ghost { background: rgba(255,255,255,.06); padding: 10px 14px; }
.primary { background: linear-gradient(135deg, #b46cff, #41d9c4); border: 0; color: #12091c; padding: 11px 16px; font-weight: 900; }
.primary:disabled { opacity: .45; cursor: not-allowed; }
.hidden { display: none !important; }
.hint { color: var(--muted); margin: 4px 0 0; font-size: 13px; }
.deck-wrap { margin: 18px 0; }
.deck { display: grid; grid-template-columns: repeat(auto-fill, minmax(72px, 1fr)); gap: 10px; }
.card { min-height: 112px; border: 1px solid var(--border); border-radius: 14px; background: linear-gradient(145deg, rgba(60,30,95,.96), rgba(18,10,28,.98)); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 8px; cursor: pointer; box-shadow: inset 0 0 0 1px rgba(255,255,255,.04), 0 14px 36px rgba(0,0,0,.25); }
.card:hover { transform: translateY(-2px); border-color: rgba(215,168,255,.65); }
.card.selected { background: linear-gradient(145deg, rgba(215,168,255,.32), rgba(125,229,209,.18)); border-color: var(--accent-2); }
.card .back { font-size: 26px; color: var(--accent); }
.card strong { font-size: 11px; line-height: 1.15; text-align: center; }
.card small, .card .num { color: var(--muted); font-size: 10px; text-transform: uppercase; }
.result { margin-top: 18px; }
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
h2 { margin: 0; }
#prompt { min-height: 260px; }
@media (max-width: 680px) {
  .shell { padding: 16px; }
  .hero { flex-direction: column; }
  .modes { grid-template-columns: 1fr; }
  .deck { grid-template-columns: repeat(auto-fill, minmax(58px, 1fr)); gap: 8px; }
  .card { min-height: 92px; }
}