/* ==========================================================================
   Endless Runner Arcade — game shell, HUD, overlays and touch controls
   ========================================================================== */

.game-shell {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

/* ------------------------------------------------------------- Stage -- */
.game-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #06050f;
  touch-action: none;           /* we handle swipes ourselves */
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
}
.game-stage canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}

/* Fullscreen handling */
.game-shell:fullscreen { border-radius: 0; border: 0; display: flex; flex-direction: column; background: #06050f; }
.game-shell:fullscreen .game-stage { flex: 1; aspect-ratio: auto; }

/* --------------------------------------------------------------- HUD -- */
.game-hud {
  position: absolute; inset: 0;
  pointer-events: none;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: clamp(.5rem, 1.6vw, 1rem);
  font-variant-numeric: tabular-nums;
}
.hud-row { display: flex; gap: clamp(.4rem, 1.4vw, .9rem); flex-wrap: wrap; align-items: flex-start; }
.hud-row--bottom { align-items: flex-end; justify-content: space-between; }

.hud-stat {
  background: rgba(7, 6, 17, .62);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r-sm);
  padding: .3rem .65rem;
  backdrop-filter: blur(6px);
  min-width: 64px;
}
.hud-stat span {
  display: block; font-size: .5625rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--c-text-dim); font-weight: 800; line-height: 1.4;
}
.hud-stat strong {
  display: block; font-size: clamp(.85rem, 2.4vw, 1.15rem); font-weight: 900;
  color: var(--c-text); line-height: 1.15;
}
.hud-stat--combo strong { color: var(--c-accent-3); }
.hud-stat--score strong { color: var(--c-accent); }

.hud-spacer { flex: 1; }

/* Power-up status chips */
.hud-powerups { display: flex; gap: .4rem; flex-wrap: wrap; }
.pu-chip {
  display: inline-flex; align-items: center; gap: .35em;
  background: rgba(7,6,17,.68); border: 1px solid var(--c-accent);
  color: var(--c-accent); border-radius: var(--r-pill);
  font-size: .625rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase;
  padding: .25rem .6rem;
}
.pu-chip[data-kind="shield"]     { border-color: #7cf9ff; color: #7cf9ff; }
.pu-chip[data-kind="magnet"]     { border-color: #ff2d95; color: #ff9ecb; }
.pu-chip[data-kind="multiplier"] { border-color: var(--c-accent-3); color: var(--c-accent-3); }
.pu-chip[data-kind="boost"]      { border-color: var(--c-danger); color: #ff8fa3; }
.pu-chip[data-kind="slowmo"]     { border-color: var(--c-success); color: var(--c-success); }
.pu-bar { display: block; width: 26px; height: 3px; border-radius: 2px; background: currentColor; opacity: .4; }

/* Ability cooldown meter */
.hud-meter { background: rgba(7,6,17,.62); border: 1px solid rgba(255,255,255,.1); border-radius: var(--r-sm); padding: .35rem .6rem; min-width: 96px; }
.hud-meter span { display: block; font-size: .5625rem; letter-spacing: .14em; text-transform: uppercase; color: var(--c-text-dim); font-weight: 800; }
.hud-meter .meter-track { height: 5px; background: rgba(255,255,255,.14); border-radius: 3px; overflow: hidden; margin-top: .25rem; }
.hud-meter .meter-fill { height: 100%; width: 0%; background: var(--c-accent); border-radius: 3px; transition: width .1s linear; }
.hud-meter[data-state="ready"] .meter-fill { background: var(--c-success); }

/* Floating toast (near miss, milestone, power-up pickup) */
.hud-toast {
  position: absolute; left: 50%; top: 26%; transform: translate(-50%, -50%);
  font-size: clamp(1rem, 3.5vw, 1.7rem); font-weight: 900; letter-spacing: -.02em;
  color: var(--c-accent-3); text-shadow: 0 2px 20px rgba(0,0,0,.7);
  opacity: 0; pointer-events: none;
}
.hud-toast.is-show { animation: toastPop 900ms ease-out forwards; }
@keyframes toastPop {
  0%   { opacity: 0; transform: translate(-50%, -30%) scale(.8); }
  18%  { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
  70%  { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -75%) scale(1); }
}

/* ---------------------------------------------------------- Overlays -- */
.game-overlay {
  position: absolute; inset: 0; z-index: 5;
  display: grid; place-items: center; text-align: center;
  padding: var(--sp-5);
  background: radial-gradient(ellipse at center, rgba(10,8,26,.82), rgba(5,4,14,.95));
  backdrop-filter: blur(3px);
}
.game-overlay[hidden] { display: none; }
.game-overlay__inner { max-width: 440px; width: 100%; }
.game-overlay h2 { font-size: clamp(1.4rem, 4.5vw, 2.1rem); margin-bottom: var(--sp-2); }
.game-overlay p { color: var(--c-text-soft); font-size: var(--fs-400); margin-bottom: var(--sp-4); }
.game-overlay .btn { margin: .25rem; }
.overlay-scores {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: var(--sp-3); margin: var(--sp-4) 0;
}
.overlay-scores div {
  background: rgba(255,255,255,.05); border: 1px solid var(--c-border);
  border-radius: var(--r-sm); padding: .6rem .4rem;
}
.overlay-scores strong { display: block; font-size: var(--fs-600); color: var(--c-accent); font-weight: 900; line-height: 1.2; }
.overlay-scores span { font-size: .625rem; text-transform: uppercase; letter-spacing: .1em; color: var(--c-text-dim); font-weight: 800; }
.overlay-best { font-size: var(--fs-300); color: var(--c-accent-3); font-weight: 700; }

.countdown-number {
  font-size: clamp(3rem, 14vw, 7rem); font-weight: 900; line-height: 1;
  background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; color: transparent;
}

.control-hint {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--sp-2); margin: var(--sp-4) 0; font-size: var(--fs-300);
}
.control-hint div { background: rgba(255,255,255,.05); border: 1px solid var(--c-border); border-radius: var(--r-sm); padding: .5rem; }
.control-hint kbd { display: inline-block; margin-bottom: .2rem; }
.control-hint span { display: block; color: var(--c-text-dim); }

/* ------------------------------------------------------ Touch controls -- */
.touch-controls {
  position: absolute; inset: auto 0 0 0; z-index: 4;
  display: none; justify-content: space-between; align-items: flex-end;
  padding: clamp(.5rem, 2vw, 1rem);
  pointer-events: none;
}
.game-stage[data-touch="true"] .touch-controls { display: flex; }
.touch-cluster { display: flex; gap: .5rem; pointer-events: auto; }
.touch-btn {
  width: clamp(52px, 13vw, 68px); height: clamp(52px, 13vw, 68px);
  border-radius: 50%;
  background: rgba(20, 18, 42, .72);
  border: 2px solid rgba(255,255,255,.22);
  color: var(--c-text); font-size: 1.3rem; font-weight: 900;
  display: grid; place-items: center; cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-tap-highlight-color: transparent; touch-action: none;
}
.touch-btn:active { background: rgba(0, 229, 255, .3); border-color: var(--c-accent); transform: scale(.94); }
.touch-btn[hidden] { display: none; }
.touch-btn small { display: block; font-size: .5rem; letter-spacing: .08em; text-transform: uppercase; font-weight: 800; opacity: .7; }

/* ------------------------------------------------------------ Toolbar -- */
.game-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  background: var(--c-surface-2); border-top: 1px solid var(--c-border-soft);
}
.game-bar__title { font-weight: 800; color: var(--c-text); margin-right: auto; font-size: var(--fs-400); }
.game-bar .icon-btn[aria-pressed="false"] { color: var(--c-text-dim); }

/* ------------------------------------------------------- Game sidebar -- */
.game-sidebar .panel + .panel { margin-top: var(--sp-4); }
.score-list { list-style: none; padding: 0; margin: 0; }
.score-list li { display: flex; justify-content: space-between; gap: var(--sp-3); padding: .55rem 0; border-bottom: 1px solid var(--c-border-soft); font-size: var(--fs-400); }
.score-list li:last-child { border-bottom: 0; }
.score-list span { color: var(--c-text-dim); }
.score-list strong { color: var(--c-accent); font-variant-numeric: tabular-nums; }

.control-table { width: 100%; font-size: var(--fs-400); }
.control-table th { width: 42%; background: transparent; color: var(--c-text-dim); font-weight: 700; font-size: var(--fs-300); text-transform: uppercase; letter-spacing: .06em; }
.control-table td { color: var(--c-text-soft); }

.share-row { display: flex; gap: var(--sp-2); flex-wrap: wrap; }

/* ------------------------------------------------- Thumbnail canvases -- */
.thumb-canvas { width: 100%; height: 100%; display: block; background: #0d0b1c; }

/* ------------------------------------------------------ Reduced motion -- */
@media (prefers-reduced-motion: reduce) {
  .hud-toast.is-show { animation: none; opacity: 1; }
  .touch-btn:active { transform: none; }
}