/* tetris — base.css
 * Reset, layout, generic chrome. Theme-agnostic. */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.4;
  color: var(--color-text);
  background: var(--color-bg);
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  min-height: 100dvh;
  overflow: hidden;
}

/* Background canvas (tetromino field) */
#bg-canvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: var(--bg-opacity, .35);
}

/* Topbar */
.topbar {
  position: relative;
  z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  padding-top: max(14px, env(safe-area-inset-top));
}
.brand-group { display: inline-flex; align-items: center; gap: 10px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--color-text);
  font-weight: 700; letter-spacing: -.01em;
  cursor: pointer;
}
.brand:hover { opacity: .85; }
.brand svg { color: var(--color-accent); }
.brand-version {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; font-weight: 500;
  color: var(--color-text-muted);
  padding: 2px 6px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  text-decoration: none;
  transition: color .15s ease, border-color .15s ease;
}
.brand-version:hover { color: var(--color-text); border-color: var(--color-text-muted); }
.topbar-actions { display: flex; align-items: center; gap: 6px; }
.iconbtn {
  height: 32px; min-width: 32px; padding: 0 8px;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: inherit; font-size: 14px;
  cursor: pointer;
  transition: background .15s, transform .1s, border-color .15s;
}
.iconbtn:hover { background: var(--color-surface-hover); }
.iconbtn:active { transform: scale(.96); }
.topbar-actions .sep {
  width: 1px; height: 18px; background: var(--color-border); margin: 0 4px;
}

/* Stage */
.stage {
  position: relative; z-index: 5;
  display: flex; flex-direction: column; align-items: center;
  gap: 14px;
  padding: 6px 16px 16px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  height: calc(100dvh - 60px);
}

/* Dialog (settings & game-over) */
.dialog {
  border: 1px solid var(--color-border);
  background: var(--color-surface-strong);
  color: var(--color-text);
  border-radius: 12px;
  padding: 0;
  max-width: 480px; width: calc(100% - 32px);
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.dialog::backdrop {
  /* v1.5.6 — strengthen the backdrop on mobile so the dialog reads as a
   * full takeover even when iOS bleeds position:fixed siblings on top of
   * the dialog top-layer. The JS-driven `body.dialog-open` rule in
   * game.css also hides the vpad + mobile-bar entirely while we're up. */
  background: rgba(0,0,0,.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.dialog-form { padding: 22px 24px; display: grid; gap: 14px; }
.dialog-form h2 { margin: 0 0 4px; font-size: 18px; font-weight: 700; }
.dialog-form fieldset {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px 14px;
  display: grid; gap: 8px;
}
.dialog-form legend { padding: 0 6px; color: var(--color-text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.dialog-form label { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.dialog-form label.row { display: grid; grid-template-columns: 110px 1fr auto; gap: 10px; align-items: center; }
.dialog-form label.row > span { color: var(--color-text-muted); font-size: 13px; }
.dialog-form input[type=text],
.dialog-form input[type=email],
.dialog-form input[type=url],
.dialog-form select,
.dialog-form input:not([type]) {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 6px;
  padding: 8px 10px;
  font: inherit;
  width: 100%;
}
.dialog-form input[type=range] { width: 100%; }
.dialog-form .hint { font-size: 12px; color: var(--color-text-muted); margin: 0; }
.dialog-form menu { display: flex; gap: 8px; justify-content: flex-end; margin: 4px 0 0; padding: 0; list-style: none; }
.dialog-form menu button {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 8px 14px;
  border-radius: 6px;
  font: inherit;
  cursor: pointer;
}
.dialog-form menu button.primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-color: transparent;
  font-weight: 600;
}
.dialog-form menu button.ghost { background: transparent; }
.final { display: flex; gap: 14px; flex-wrap: wrap; color: var(--color-text-muted); margin: 0; }
.final strong { color: var(--color-text); font-family: 'JetBrains Mono', monospace; }

kbd {
  display: inline-block;
  padding: 1px 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--color-text);
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}