/* ── Coin Racer · design tokens (arcade / pixel-neon) ── */
:root {
  --bg:          #0b1020;
  --bg-deep:     #070a14;
  --panel:       rgba(13,19,38,.82);
  --panel-2:     rgba(255,255,255,.05);
  --border:      rgba(255,255,255,.10);
  --border-strong: rgba(255,255,255,.20);
  --text:        #f2f5ff;
  --text-muted:  #97a1c0;
  --primary:     #dc2626;
  --secondary:   #2563eb;
  --accent:      #22c55e;
  --gold:        #ffc93c;
  --gold-dark:   #d98d09;
  --cyan:        #38e8ff;
  --shadow:      0 10px 40px rgba(0,0,0,.55);
  --r-sm: 10px; --r: 16px; --r-lg: 24px;
  --font-ar: 'Cairo', ui-sans-serif, system-ui, sans-serif;
  --font-arcade: 'Press Start 2P', 'Cairo', monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font-ar);
  background: var(--bg-deep);
  color: var(--text);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
  touch-action: none;
}
#stage { position: fixed; inset: 0; overflow: hidden; }
canvas#game { display: block; width: 100%; height: 100%; background: var(--bg); }

/* CRT scanlines + vignette over the canvas */
#stage::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 3;
  background:
    repeating-linear-gradient(180deg, rgba(255,255,255,.035) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at 50% 55%, transparent 45%, rgba(0,0,0,.55) 100%);
  mix-blend-mode: overlay;
}
.num { font-family: var(--font-arcade); font-variant-numeric: tabular-nums; letter-spacing: 0; }

/* ── HUD ── */
.hud { position: absolute; inset: 0; z-index: 5; pointer-events: none; padding: clamp(.5rem, 1.6vw, 1.1rem); }
.hud-top { display: flex; align-items: flex-start; gap: clamp(.4rem, 1.2vw, .8rem); flex-wrap: wrap; }
.stat {
  display: flex; flex-direction: column; gap: .1rem;
  padding: .45rem .85rem; min-width: 84px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-sm);
  backdrop-filter: blur(10px); box-shadow: 0 6px 24px rgba(0,0,0,.35);
}
.stat .lbl { font-size: .62rem; font-weight: 800; letter-spacing: .12em; color: var(--text-muted); }
.stat .val { font-size: clamp(.9rem, 2.2vw, 1.15rem); line-height: 1.3; color: var(--text); }
.hud-tools { position: absolute; top: clamp(.5rem, 1.6vw, 1.1rem); left: clamp(.5rem, 1.6vw, 1.1rem); display: flex; gap: .4rem; pointer-events: auto; }
.coin-stat { flex-direction: row; align-items: center; gap: .45rem; }
.coin-stat .val { color: var(--gold); }
.best-stat .val { color: var(--cyan); }
.coin-icon {
  width: 16px; height: 16px; border-radius: 50%; flex: none;
  background: radial-gradient(circle at 35% 30%, #fff6d0, var(--gold) 45%, var(--gold-dark));
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.55), 0 0 10px rgba(255,201,60,.6);
}
.icon-btn {
  width: 40px; height: 40px; display: grid; place-items: center; cursor: pointer;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-sm);
  color: var(--text); backdrop-filter: blur(10px);
  transition: transform .15s ease, box-shadow .15s ease, background .2s ease, color .2s;
}
.icon-btn:hover { transform: translateY(-2px); background: rgba(255,255,255,.11); box-shadow: 0 10px 26px rgba(0,0,0,.45); }
.icon-btn.off { color: var(--text-muted); }
.icon-btn svg { width: 20px; height: 20px; stroke-width: 1.75; }

.hud-bottom {
  position: absolute; bottom: clamp(.5rem, 1.6vw, 1.1rem); right: clamp(.5rem, 1.6vw, 1.1rem);
  display: flex; flex-direction: column; align-items: flex-end; gap: .5rem;
}
.gauge {
  display: flex; align-items: baseline; gap: .35rem;
  padding: .35rem .8rem; background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--r-sm); backdrop-filter: blur(10px);
}
.gauge-lbl { font-size: .6rem; font-weight: 800; letter-spacing: .12em; color: var(--text-muted); }
.gauge-val { font-size: 1.05rem; color: var(--gold); }
.gauge-unit { font-size: .6rem; color: var(--text-muted); }
.nin-wrap { display: flex; align-items: center; gap: .45rem; padding: .35rem .7rem; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-sm); backdrop-filter: blur(10px); }
.nin-lbl { font-size: .6rem; font-weight: 800; letter-spacing: .1em; color: var(--text-muted); }
.nin-bar { width: clamp(90px, 18vw, 160px); height: 8px; border-radius: 99px; background: rgba(255,255,255,.12); overflow: hidden; }
.nin-fill { height: 100%; width: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--cyan), var(--secondary)); transition: width .12s linear; }
.nin-fill.low { background: linear-gradient(90deg, #f59e0b, var(--primary)); }
.combo { font-family: var(--font-arcade); font-size: 1rem; color: var(--gold); text-shadow: 0 0 14px rgba(255,201,60,.7); opacity: 0; transition: opacity .2s; }
.combo.on { opacity: 1; animation: pop .3s ease; }
@keyframes pop { from { transform: scale(.6); opacity: 0 } to { transform: scale(1); opacity: 1 } }

/* ── Touch controls ── */
.touch { position: absolute; inset: 0; z-index: 4; display: none; }
body.touch-mode .touch { display: block; }
.tzone {
  position: absolute; bottom: 0; width: 34%; height: 42%;
  display: grid; place-items: center; color: rgba(255,255,255,.22); cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.tzone.left { left: 0; }
.tzone.right { right: 0; }
.tzone.active { background: radial-gradient(ellipse at center, rgba(56,232,255,.16), transparent 70%); color: rgba(255,255,255,.75); }
.tzone svg { width: clamp(34px, 7vw, 56px); height: auto; stroke-width: 1.5; }
.tbtn {
  position: absolute; bottom: clamp(1rem, 4vh, 2.2rem); left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: .4rem; cursor: pointer;
  padding: .7rem 1.5rem; border-radius: 99px; border: 1px solid var(--border-strong);
  background: rgba(34,197,94,.16); color: #d6ffe6; font-family: var(--font-ar); font-weight: 800; font-size: .85rem;
  backdrop-filter: blur(10px);
}
.tbtn svg { width: 18px; height: 18px; }
.tbtn.active { background: rgba(34,197,94,.42); box-shadow: 0 0 26px rgba(34,197,94,.5); }

/* ── Countdown ── */
.countdown { position: absolute; inset: 0; z-index: 6; display: none; place-items: center; pointer-events: none; }
.countdown.on { display: grid; }
.countdown span {
  font-family: var(--font-arcade); font-size: clamp(3rem, 14vw, 8rem); color: #fff;
  text-shadow: 0 0 24px rgba(56,232,255,.85), 0 0 60px rgba(37,99,235,.7);
  animation: countPop .8s ease;
}
@keyframes countPop { 0% { transform: scale(.4); opacity: 0 } 40% { transform: scale(1.08); opacity: 1 } 100% { transform: scale(1); opacity: .92 } }

/* ── Toasts ── */
.toast-wrap { position: absolute; z-index: 7; top: 34%; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; gap: .35rem; align-items: center; pointer-events: none; }
.toast {
  font-family: var(--font-arcade); font-size: clamp(.6rem, 1.7vw, .85rem); padding: .45rem .9rem;
  border-radius: 99px; animation: floatUp .9s ease forwards; white-space: nowrap;
}
.toast.gold { background: rgba(255,201,60,.16); color: var(--gold); border: 1px solid rgba(255,201,60,.4); }
.toast.cyan { background: rgba(56,232,255,.14); color: var(--cyan); border: 1px solid rgba(56,232,255,.4); }
@keyframes floatUp { 0% { opacity: 0; transform: translateY(10px) } 25% { opacity: 1; transform: translateY(0) } 100% { opacity: 0; transform: translateY(-26px) } }

/* ── Overlays / panels ── */
.overlay {
  position: absolute; inset: 0; z-index: 8; display: none; align-items: center; justify-content: center;
  padding: 1rem; background: radial-gradient(ellipse at 50% 40%, rgba(11,16,32,.72), rgba(4,6,12,.93));
  backdrop-filter: blur(6px);
}
.overlay.show { display: flex; }
.panel {
  width: min(760px, 100%); max-height: 92dvh; overflow-y: auto;
  padding: clamp(1.25rem, 3.2vw, 2.4rem);
  background: var(--panel); border: 1px solid var(--border-strong); border-radius: var(--r-lg);
  box-shadow: var(--shadow), 0 0 0 1px rgba(56,232,255,.08) inset;
  animation: rise .35s ease;
  text-align: center;
  touch-action: pan-y;
}
.panel-sm { width: min(520px, 100%); }
@keyframes rise { from { opacity: 0; transform: translateY(18px) } to { opacity: 1; transform: none } }
.kicker { font-family: var(--font-arcade); font-size: .62rem; letter-spacing: .2em; color: var(--cyan); text-transform: uppercase; margin-bottom: .7rem; }
.game-title {
  font-size: clamp(1.7rem, 5.6vw, 3rem); font-weight: 900; letter-spacing: -.02em; line-height: 1.15;
  background: linear-gradient(100deg, #fff 10%, var(--gold) 55%, var(--primary) 95%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: .7rem;
}
.lede { color: var(--text-muted); font-size: clamp(.85rem, 2.1vw, 1rem); line-height: 1.75; max-width: 56ch; margin: 0 auto 1.4rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: .7rem; margin-bottom: 1.4rem; text-align: start; }
.mini {
  display: flex; flex-direction: column; gap: .28rem; padding: .85rem 1rem;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--r);
  backdrop-filter: blur(12px); transition: transform .2s ease, box-shadow .2s ease, border-color .2s;
}
.mini:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(0,0,0,.45); border-color: var(--border-strong); }
.mini b { font-size: .95rem; }
.mini span:last-child { font-size: .78rem; color: var(--text-muted); line-height: 1.6; }
.dot { width: 11px; height: 11px; border-radius: 3px; margin-bottom: .1rem; }
.dot-gold { background: var(--gold); box-shadow: 0 0 14px var(--gold); }
.dot-red { background: var(--primary); box-shadow: 0 0 14px var(--primary); }
.dot-blue { background: var(--secondary); box-shadow: 0 0 14px var(--secondary); }

.keys { display: flex; flex-wrap: wrap; gap: .5rem 1rem; justify-content: center; margin-bottom: 1.4rem; color: var(--text-muted); font-size: .78rem; }
.keys span { display: inline-flex; align-items: center; gap: .35rem; }
.kbd {
  font-family: var(--font-arcade); font-size: .55rem; padding: .3rem .45rem; color: var(--text);
  background: rgba(255,255,255,.09); border: 1px solid var(--border-strong); border-bottom-width: 3px; border-radius: 6px;
}
.hint { margin-top: .9rem; font-size: .72rem; color: var(--text-muted); opacity: .85; }

/* ── Buttons ── */
.row { display: flex; gap: .6rem; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .8rem 1.7rem; border-radius: 99px; border: none; cursor: pointer;
  font-family: var(--font-ar); font-weight: 800; font-size: .92rem; color: #fff;
  transition: transform .15s ease, box-shadow .15s ease, background .2s;
}
.btn svg { width: 18px; height: 18px; stroke-width: 2; }
.btn-primary { background: linear-gradient(135deg, var(--primary), #ff5a3c); box-shadow: 0 8px 30px rgba(220,38,38,.42); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px rgba(220,38,38,.58); }
.btn-ghost { background: transparent; border: 1.5px solid var(--border-strong); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,.08); transform: translateY(-2px); }

/* ── Game over ── */
.score-final { display: flex; flex-direction: column; align-items: center; gap: .1rem; margin-bottom: 1.2rem; }
.score-final .lbl { font-size: .64rem; font-weight: 800; letter-spacing: .14em; color: var(--text-muted); }
.score-final .big { font-size: clamp(2rem, 8vw, 3.2rem); color: var(--gold); text-shadow: 0 0 26px rgba(255,201,60,.5); }
.score-final .new {
  display: none; margin-top: .3rem; font-size: .7rem; font-weight: 800; padding: .22rem .7rem; border-radius: 99px;
  background: rgba(34,197,94,.16); color: var(--accent); border: 1px solid rgba(34,197,94,.45);
}
.score-final .new.on { display: inline-block; animation: pop .4s ease; }
.over-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: .6rem; margin-bottom: 1.4rem; }
.over-grid > div {
  display: flex; flex-direction: column; gap: .2rem; padding: .7rem .8rem;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--r-sm);
}
.over-grid .lbl { font-size: .6rem; font-weight: 800; letter-spacing: .1em; color: var(--text-muted); }
.over-grid b { font-size: 1rem; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .stat { min-width: 68px; padding: .35rem .6rem; }
  .stat .lbl { font-size: .55rem; }
  .best-stat { display: none; }
  .cards { grid-template-columns: 1fr; }
  .hud-bottom { bottom: .5rem; right: .5rem; }
}
@media (max-height: 520px) {
  .panel { padding: 1rem; }
  .cards, .keys { display: none; }
  .lede { margin-bottom: .8rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}