/* ==========================================================================
   Gem Arcade Games — Game stage, HUD, overlays and touch controls
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Game page layout
   -------------------------------------------------------------------------- */
.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--s-5);
  align-items: start;
}
.game-side {
  display: grid;
  gap: var(--s-4);
  position: sticky;
  top: calc(var(--header-h) + 16px);
}

.game-hero { padding-block: var(--s-4) var(--s-3); }
.game-hero h1 { margin-bottom: var(--s-2); }
.game-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--s-3);
}
.game-hero__tagline {
  color: var(--text-muted);
  font-size: var(--t-md);
  max-width: 70ch;
  margin: 0;
}

/* --------------------------------------------------------------------------
   2. Stage
   -------------------------------------------------------------------------- */
.game-stage {
  --stage-max-h: 72vh;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-3);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(170deg, #161e38 0%, #0d1326 100%);
  box-shadow: var(--sh-lg);
  contain: layout;
}

/* HUD — sits ABOVE the canvas, never on top of it */
.game-stage__hud {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 8px;
}
.hud-item {
  flex: 1 1 auto;
  min-width: 74px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  padding: 6px 10px;
  border-radius: var(--r-sm);
  background: rgba(10,14,28,.62);
  border: 1px solid var(--line-soft);
  text-align: center;
}
.hud-item__label {
  font-size: .62rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
  line-height: 1.3;
}
.hud-item__value {
  font-size: 1.08rem;
  font-weight: 900;
  color: #fff;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.hud-item--gems .hud-item__value { color: var(--gem-cyan); }
.hud-item--combo .hud-item__value { color: var(--gem-amber); }
.hud-item--best .hud-item__value { color: var(--gem-emerald); }
.hud-item[data-bump="true"] .hud-item__value { animation: hud-bump .28s var(--ease); }

@keyframes hud-bump {
  0%   { transform: scale(1); }
  45%  { transform: scale(1.22); }
  100% { transform: scale(1); }
}

/* Canvas frame */
.game-stage__screen {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  max-height: var(--stage-max-h);
  margin-inline: auto;
  border-radius: var(--r-md);
  overflow: hidden;
  background: #070b16;
  border: 1px solid var(--line-soft);
  touch-action: none;
}
.game-stage__screen canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: auto;
  outline: none;
}
.game-stage__screen canvas:focus-visible {
  outline: 3px solid var(--gem-amber);
  outline-offset: -3px;
}

/* --------------------------------------------------------------------------
   3. Overlays (ready / paused / game over / error)
   -------------------------------------------------------------------------- */
.game-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  padding: var(--s-5) var(--s-4);
  text-align: center;
  background: radial-gradient(120% 120% at 50% 0%, rgba(17,24,48,.86), rgba(5,8,18,.95));
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  overflow-y: auto;
  /* The screen below sets touch-action:none so the page cannot scroll under
     the player. Overlays need to scroll on short screens, so re-enable it. */
  touch-action: pan-y;
}
.game-overlay[data-visible="true"] { display: flex; }

.game-overlay__eyebrow {
  font-size: var(--t-xs);
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gem-emerald);
  margin: 0;
}
.game-overlay h2 {
  margin: 0;
  font-size: clamp(1.4rem, 1.1rem + 1.6vw, 2.1rem);
}
.game-overlay p {
  margin: 0;
  max-width: 46ch;
  color: var(--text-muted);
  font-size: var(--t-sm);
}
.game-overlay .btn-row { justify-content: center; }

.overlay-scores {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(84px, 1fr));
  gap: 10px;
  width: min(440px, 100%);
  margin-block: var(--s-2);
}
.overlay-score {
  padding: 9px 6px;
  border-radius: var(--r-sm);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line);
}
.overlay-score span {
  display: block;
  font-size: .6rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.overlay-score strong {
  font-size: 1.28rem;
  font-weight: 900;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.overlay-score--best strong { color: var(--gem-emerald); }

.new-best {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 14px;
  border-radius: var(--r-pill);
  background: rgba(255,198,91,.14);
  border: 1px solid rgba(255,198,91,.45);
  color: var(--gem-amber);
  font-size: var(--t-xs);
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* Countdown */
.countdown-num {
  font-size: clamp(3rem, 2rem + 8vw, 6rem);
  font-weight: 900;
  line-height: 1;
  background: var(--grad-gem);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Loading spinner */
.game-spinner {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 3px solid var(--line);
  border-top-color: var(--gem-cyan);
  animation: spin 900ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Error state */
.game-overlay--error { background: rgba(8,10,20,.96); }
.game-overlay--error h2 { color: var(--gem-amber); }

/* --------------------------------------------------------------------------
   4. Toolbar under the stage
   -------------------------------------------------------------------------- */
.game-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  align-items: center;
}
.game-toolbar .btn { flex: 0 1 auto; }
.game-toolbar .spacer { flex: 1 1 auto; }
.game-toolbar .btn svg { width: 17px; height: 17px; }

/* --------------------------------------------------------------------------
   5. Touch controls
   -------------------------------------------------------------------------- */
.touch-controls {
  display: none;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s-3);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}
.touch-cluster { display: flex; gap: 10px; }
.touch-btn {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(26,35,64,.9);
  color: #fff;
  font-size: 1.35rem;
  font-weight: 800;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color .1s var(--ease), transform .1s var(--ease);
}
.touch-btn svg { width: 26px; height: 26px; }
.touch-btn:active, .touch-btn[data-pressed="true"] {
  background: rgba(69,201,255,.28);
  border-color: var(--gem-cyan);
  transform: scale(.96);
}
.touch-btn--wide { width: 106px; }
.touch-btn--primary {
  background: rgba(51,227,164,.18);
  border-color: rgba(51,227,164,.45);
  color: var(--gem-emerald);
}

.touch-hint {
  font-size: var(--t-xs);
  color: var(--text-dim);
  text-align: center;
  margin: 0;
}

/* --------------------------------------------------------------------------
   6. Side rail cards (controls, best scores, quick facts)
   -------------------------------------------------------------------------- */
.rail-card {
  padding: var(--s-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--surface);
}
.rail-card h2, .rail-card h3 {
  font-size: var(--t-xs);
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: var(--s-3);
}
.rail-list { list-style: none; margin: 0; padding: 0; font-size: var(--t-sm); }
.rail-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  padding: 7px 0;
  border-bottom: 1px solid var(--line-soft);
  margin: 0;
}
.rail-list li:last-child { border-bottom: 0; }
.rail-list dt, .rail-list .k { color: var(--text-muted); }
.rail-list dd, .rail-list .v { margin: 0; color: #fff; font-weight: 700; text-align: right; }

.key-legend { display: grid; gap: 9px; font-size: var(--t-sm); }
.key-legend div { display: flex; align-items: center; gap: 10px; }
.key-legend .keys { flex: none; display: inline-flex; gap: 3px; }
.key-legend span:last-child { color: var(--text-muted); }

/* --------------------------------------------------------------------------
   7. Local best scoreboard
   -------------------------------------------------------------------------- */
.local-best {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(104px, 1fr));
  gap: 10px;
}
.local-best__item {
  padding: 10px;
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border: 1px solid var(--line);
  text-align: center;
}
.local-best__item span {
  display: block;
  font-size: .6rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  font-weight: 800;
  color: var(--text-dim);
}
.local-best__item strong {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--gem-emerald);
  font-variant-numeric: tabular-nums;
}
.local-best-note {
  font-size: var(--t-xs);
  color: var(--text-dim);
  margin: var(--s-3) 0 0;
}

/* --------------------------------------------------------------------------
   8. Instruction blocks (outside canvas — indexable & accessible)
   -------------------------------------------------------------------------- */
.howto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--s-4);
}
.howto-card {
  padding: var(--s-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--surface);
}
.howto-card h3 {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1rem;
  margin-bottom: var(--s-2);
}
.howto-card h3::before {
  content: "";
  width: 10px; height: 10px;
  border-radius: 2px;
  transform: rotate(45deg);
  background: var(--grad-gem);
  flex: none;
}
.howto-card p, .howto-card ul { font-size: var(--t-sm); color: var(--text-muted); margin-bottom: 0; }

/* Collectible & power-up legends */
.legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--s-3);
}
.legend-item {
  display: flex;
  gap: var(--s-3);
  align-items: flex-start;
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-md);
  background: var(--surface);
  border: 1px solid var(--line);
}
.legend-swatch {
  flex: none;
  width: 26px; height: 26px;
  border-radius: 4px;
  transform: rotate(45deg);
  margin-top: 4px;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.22);
}
.legend-item h4 { margin: 0 0 2px; font-size: .96rem; }
.legend-item p { margin: 0; font-size: var(--t-sm); color: var(--text-muted); }

.gem-emerald  { background: #33e3a4; }
.gem-cyan     { background: #45c9ff; }
.gem-violet   { background: #9d82ff; }
.gem-amber    { background: #ffc65b; }
.gem-rose     { background: #ff6f9f; }
.gem-ruby     { background: #ff5a6e; }
.gem-white    { background: #eaf2ff; }

/* --------------------------------------------------------------------------
   9. Share row
   -------------------------------------------------------------------------- */
.share-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--t-sm);
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   10. Related games strip
   -------------------------------------------------------------------------- */
.related-strip {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: var(--s-4);
}

/* --------------------------------------------------------------------------
   11. Reduced motion inside games
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .hud-item[data-bump="true"] .hud-item__value { animation: none; }
  .game-spinner { animation-duration: 2s; }
}