:root {
  --bg: #0b1220;
  --bg-elev: #0f172a;
  --bg-soft: #111c33;
  --fg: #e5e7eb;
  --fg-muted: #94a3b8;
  --border: #1f2a44;
  --ice: #38bdf8;
  --warm: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: linear-gradient(180deg, #0b1220 0%, #0f172a 60%, #0b1220 100%);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}
button, input, select { font: inherit; color: inherit; }

/* --- Brand Header --- */
.brand-header {
  display: flex;
  justify-content: center;
  padding: 32px 16px 8px;
}
.brand-logo { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.brand-mark {
  font-weight: 800;
  font-size: 48px;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--ice), var(--warm));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-sub {
  font-size: 14px;
  color: var(--fg-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* --- Container --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 16px 64px;
}

.page-title { margin: 16px 0 4px; font-size: 28px; }
.page-sub { margin: 0 0 24px; color: var(--fg-muted); }

/* --- Game Cards --- */
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.game-card {
  display: block;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}
.game-card:hover, .game-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--card-accent, var(--ice));
  background: var(--bg-soft);
  outline: none;
}
.game-card-icon {
  width: 56px; height: 56px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--card-accent, var(--ice)) 22%, transparent);
  border: 1px solid color-mix(in srgb, var(--card-accent, var(--ice)) 50%, transparent);
  display: grid; place-items: center;
  margin-bottom: 14px;
}
.game-card-name { font-size: 20px; font-weight: 700; margin: 0 0 6px; }
.game-card-short { color: var(--fg-muted); margin: 0; font-size: 14px; }
.game-card-go {
  margin-top: 14px;
  color: var(--card-accent, var(--ice));
  font-weight: 600;
  font-size: 14px;
}

/* --- Footer --- */
.brand-footer {
  text-align: center;
  color: var(--fg-muted);
  font-size: 12px;
  padding: 16px;
  letter-spacing: .5px;
}

/* --- Lobby --- */
.lobby-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}
.lobby-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.lobby-title {
  display: flex; flex-direction: column; gap: 2px;
}
.lobby-title .brand-mark {
  font-size: 28px; letter-spacing: 3px;
}
.lobby-title .game-name { font-size: 18px; color: var(--fg-muted); }

.btn {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease, opacity 120ms;
}
.btn:hover { background: var(--bg-soft); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary {
  background: linear-gradient(135deg, var(--ice), var(--warm));
  color: #0b1220;
  border-color: transparent;
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 12px; font-size: 16px; }

label.field { display: block; margin-bottom: 12px; }
label.field > span { display: block; margin-bottom: 6px; color: var(--fg-muted); font-size: 13px; }
input[type="text"], input[type="number"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--fg);
  font-size: 15px;
}
input[type="text"]:focus, input[type="number"]:focus {
  outline: none;
  border-color: var(--ice);
}

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row > * { flex: 1; }
.row > .btn { flex: 0 0 auto; }

.code-display {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 32px;
  letter-spacing: 6px;
  background: var(--bg);
  border: 1px dashed var(--border);
  padding: 12px 18px;
  border-radius: 8px;
  text-align: center;
  user-select: all;
}

.players-list { list-style: none; padding: 0; margin: 0; }
.players-list li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 4px;
  border-bottom: 1px solid var(--border);
}
.players-list li:last-child { border-bottom: none; }
.player-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--player-color, #888);
  border: 1px solid rgba(0, 0, 0, .35);
  flex: 0 0 auto;
}
.player-name { flex: 1; }
.player-host-tag {
  font-size: 11px; color: var(--warm);
  border: 1px solid color-mix(in srgb, var(--warm) 50%, transparent);
  padding: 2px 6px; border-radius: 999px;
}
.player-offline { opacity: .5; }
.player-offline::after { content: ' (offline)'; color: var(--fg-muted); font-size: 12px; }

.config-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--border); }
.config-row:last-child { border-bottom: none; }
.config-row label { color: var(--fg-muted); font-size: 14px; }
.config-row input[type="number"] { width: 96px; }

.share-link {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: ui-monospace, monospace;
  font-size: 13px;
  color: var(--ice);
  word-break: break-all;
  user-select: all;
}

.error-box {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 50%, transparent);
  color: #fecaca;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 14px;
}

.hidden { display: none !important; }

/* --- Game Screen --- */
.game-screen { display: flex; flex-direction: column; align-items: center; padding: 12px; gap: 8px; }
.game-canvas-wrap {
  position: relative;
  width: 100%;
  max-width: 1280px;
  aspect-ratio: 16 / 9;
  background: #050b18;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.game-canvas-wrap canvas { width: 100%; height: 100%; display: block; }

.hud { width: 100%; max-width: 1280px; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; justify-content: space-between; }
.hud .hud-left, .hud .hud-right { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.turn-indicator { padding: 8px 12px; background: var(--bg-elev); border: 1px solid var(--border); border-radius: 8px; font-weight: 600; }
.turn-indicator.active { background: color-mix(in srgb, var(--ice) 18%, var(--bg-elev)); border-color: var(--ice); }

.rules-hint {
  width: 100%;
  max-width: 1280px;
  padding: 10px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--fg-muted);
}
.rules-hint strong { color: var(--fg); font-weight: 600; }

.ddd-watermark {
  position: absolute;
  right: 8px; bottom: 8px;
  font-weight: 800; font-size: 14px; letter-spacing: 2px;
  color: rgba(255, 255, 255, .25);
  pointer-events: none;
  user-select: none;
}

/* --- Sabotage UI (Curling) --- */
.sabotage-bar {
  display: flex; gap: 8px; align-items: center;
  padding: 8px 10px;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 8px;
}
.sabotage-bar.active { border-color: var(--warm); background: color-mix(in srgb, var(--warm) 12%, var(--bg-elev)); }
.sabotage-bar .charges { font-size: 13px; color: var(--fg-muted); }
.sabotage-bar .charges strong { color: var(--warm); font-size: 16px; }

/* --- Overlay --- */
.overlay {
  position: absolute; inset: 0;
  background: rgba(2, 6, 23, .75);
  display: grid; place-items: center;
  z-index: 5;
}
.overlay-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 28px;
  max-width: 480px;
  text-align: center;
  box-shadow: var(--shadow);
}
.overlay-card h2 { margin: 0 0 12px; }
.overlay-card p { color: var(--fg-muted); margin: 0 0 16px; }
.scores-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
.scores-table th, .scores-table td { padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: left; }
.scores-table th { color: var(--fg-muted); font-size: 13px; }

/* --- Responsive --- */
@media (max-width: 640px) {
  .brand-mark { font-size: 36px; }
  .page-title { font-size: 22px; }
  .games-grid { grid-template-columns: 1fr; }
  .code-display { font-size: 26px; letter-spacing: 4px; }
}