/* ===================================================================
   HEADBANGER SIMULATOR — rave / dubstep aesthetic
   =================================================================== */
:root {
  --bg: #07060d;
  --bg2: #0d0a1a;
  --neon-pink: #ff2d9b;
  --neon-cyan: #18e6ff;
  --neon-lime: #c6ff2e;
  --neon-purple: #9b4dff;
  --ink: #f4f0ff;
  --dim: #8c84b0;
  --font: "Arial Black", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none; /* no rubber-band scroll mid-headbang */
}
button, .btn, label[for="file-input"] { touch-action: manipulation; } /* kill double-tap zoom on controls */

#app { position: fixed; inset: 0; }

/* ---------- screens ---------- */
.screen {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
}
.screen.active { display: flex; }

.bg-grid {
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(155,77,255,0.25), transparent 55%),
    linear-gradient(transparent 95%, rgba(24,230,255,0.12) 95%) 0 0 / 100% 40px,
    linear-gradient(90deg, transparent 95%, rgba(255,45,155,0.10) 95%) 0 0 / 40px 100%,
    var(--bg);
  animation: grid-pan 12s linear infinite;
  z-index: 0;
}
@keyframes grid-pan { to { background-position: 0 0, 0 800px, 800px 0, 0 0; } }

/* ---------- logo ---------- */
.start-inner, .results-inner {
  position: relative; z-index: 2;
  width: min(560px, 92vw);
  padding: 28px 0 60px;
  text-align: center;
}

.logo {
  font-size: clamp(40px, 9vw, 86px);
  letter-spacing: -2px;
  line-height: 0.9;
  background: linear-gradient(90deg, var(--neon-pink), var(--neon-cyan), var(--neon-lime));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 18px rgba(255,45,155,0.5));
}
.glitch { position: relative; }
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute; left: 0; top: 0; width: 100%;
  -webkit-background-clip: text; background-clip: text;
}
.glitch::before { color: var(--neon-cyan); -webkit-text-fill-color: var(--neon-cyan); mix-blend-mode: screen; animation: glitch1 2.6s infinite steps(2); }
.glitch::after  { color: var(--neon-pink); -webkit-text-fill-color: var(--neon-pink); mix-blend-mode: screen; animation: glitch2 3.1s infinite steps(2); }
@keyframes glitch1 { 0%,92%,100%{transform:translate(0,0);opacity:0} 93%{transform:translate(-3px,1px);opacity:.7} 96%{transform:translate(2px,-1px);opacity:.5} }
@keyframes glitch2 { 0%,90%,100%{transform:translate(0,0);opacity:0} 91%{transform:translate(3px,-1px);opacity:.6} 95%{transform:translate(-2px,1px);opacity:.4} }

.tagline { color: var(--dim); letter-spacing: 4px; text-transform: uppercase; font-size: 13px; margin-top: 8px; }

/* ---------- panel / fields ---------- */
.panel {
  margin-top: 26px;
  background: rgba(13,10,26,0.78);
  border: 1px solid rgba(155,77,255,0.35);
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 0 40px rgba(155,77,255,0.18), inset 0 0 0 1px rgba(255,255,255,0.03);
  backdrop-filter: blur(6px);
  text-align: left;
}
.field { display: block; margin-bottom: 18px; }
.field-label { display: block; font-size: 11px; letter-spacing: 3px; color: var(--neon-cyan); text-transform: uppercase; margin-bottom: 8px; }

input[type=text] {
  width: 100%;
  background: #05040a;
  border: 1px solid rgba(24,230,255,0.3);
  border-radius: 10px;
  color: var(--ink);
  font-family: var(--font);
  font-size: 18px;
  padding: 12px 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
input[type=text]:focus { outline: none; border-color: var(--neon-pink); box-shadow: 0 0 0 3px rgba(255,45,155,0.2); }

.track-row { display: flex; gap: 8px; flex-wrap: wrap; }
.track-name { margin-top: 8px; font-size: 12px; color: var(--neon-lime); letter-spacing: 1px; }
.cam-status { margin-top: 8px; font-size: 12px; color: var(--dim); letter-spacing: 1px; }
.cam-status.ok { color: var(--neon-lime); }
.cam-status.err { color: var(--neon-pink); }

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--ink);
  transition: transform .08s ease, box-shadow .15s ease, background .15s ease;
  user-select: none;
}
.btn:active { transform: translateY(2px) scale(0.99); }
.btn-ghost {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(24,230,255,0.35);
}
.btn-ghost:hover { background: rgba(24,230,255,0.12); }
.btn-ghost.selected { border-color: var(--neon-lime); color: var(--neon-lime); box-shadow: 0 0 14px rgba(198,255,46,0.3); }
.btn-primary {
  display: block; width: 100%;
  margin-top: 8px;
  font-size: 28px;
  padding: 18px;
  background: linear-gradient(90deg, var(--neon-pink), var(--neon-purple));
  box-shadow: 0 0 30px rgba(255,45,155,0.5);
  letter-spacing: 6px;
}
.btn-primary:hover { box-shadow: 0 0 46px rgba(255,45,155,0.8); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; filter: grayscale(0.6); box-shadow: none; }

.hint { margin-top: 14px; font-size: 11px; color: var(--dim); letter-spacing: 1px; text-align: center; }
.hint em { color: var(--neon-cyan); font-style: normal; }
.privacy { margin-top: 10px; font-size: 10px; color: var(--dim); letter-spacing: 0.5px; text-align: center; line-height: 1.5; opacity: 0.85; }
.privacy em { color: var(--neon-lime); font-style: normal; }

/* ---------- leaderboard ---------- */
.leaderboard-preview { margin-top: 28px; text-align: left; }
.leaderboard-preview h3 { font-size: 13px; letter-spacing: 4px; color: var(--neon-lime); margin-bottom: 10px; text-align: center; }
.lb-list { list-style: none; counter-reset: rank; }
.lb-list li {
  counter-increment: rank;
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px; margin-bottom: 5px;
  background: rgba(255,255,255,0.03);
  border-left: 3px solid var(--neon-purple);
  border-radius: 6px;
  font-size: 14px; letter-spacing: 1px;
}
.lb-list li::before { content: counter(rank) "."; color: var(--dim); width: 28px; }
.lb-list li .lb-name { flex: 1; }
.lb-list li .lb-score { color: var(--neon-cyan); font-variant-numeric: tabular-nums; }
.lb-list li.me { border-left-color: var(--neon-pink); background: rgba(255,45,155,0.12); }
.lb-list li.me .lb-name { color: var(--neon-pink); }
.lb-empty { color: var(--dim); font-size: 12px; text-align: center; letter-spacing: 1px; }

/* ---------- game ---------- */
#screen-game { background: #000; touch-action: none; }
#stage {
  width: 100%; height: 100%;
  object-fit: contain;
  image-rendering: auto;
}

/* touch calibration chips — DOM overlay, so they're NOT in the recording */
#touch-controls {
  position: absolute;
  left: 50%; transform: translateX(-50%);
  bottom: calc(16px + env(safe-area-inset-bottom));
  display: flex; gap: 12px;
  z-index: 6;
}
#touch-controls button {
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(24, 230, 255, 0.45);
  background: rgba(13, 10, 26, 0.55);
  color: var(--ink);
  font-size: 18px;
  font-family: var(--font);
  backdrop-filter: blur(4px);
  touch-action: manipulation;
  opacity: 0.65;
}
#touch-controls button:active { opacity: 1; background: rgba(24, 230, 255, 0.25); transform: scale(0.94); }
.countdown {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(80px, 22vw, 260px);
  color: var(--ink);
  text-shadow: 0 0 40px var(--neon-pink);
  pointer-events: none;
  opacity: 0;
}
.countdown.show { animation: cd-pop .9s ease forwards; }
@keyframes cd-pop { 0%{opacity:0;transform:scale(2.2)} 30%{opacity:1;transform:scale(1)} 80%{opacity:1} 100%{opacity:0;transform:scale(.6)} }

/* hidden webcam source element (we draw it to canvas) */
#webcam { position: absolute; width: 2px; height: 2px; opacity: 0.001; pointer-events: none; left: -10px; top: -10px; }

/* ---------- results ---------- */
.result-headline {
  font-size: clamp(28px, 6vw, 52px);
  background: linear-gradient(90deg, var(--neon-lime), var(--neon-cyan));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  letter-spacing: 2px;
}
.result-headline.hi { background: linear-gradient(90deg, var(--neon-pink), var(--neon-lime), var(--neon-cyan)); animation: hue 1.5s linear infinite; }
@keyframes hue { to { filter: hue-rotate(360deg); } }
.final-score-wrap { margin: 18px 0; }
.final-score {
  font-size: clamp(56px, 16vw, 130px);
  color: var(--neon-cyan);
  text-shadow: 0 0 30px rgba(24,230,255,0.6);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.final-rank { color: var(--neon-pink); letter-spacing: 3px; margin-top: 6px; font-size: 16px; }
.result-stats {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
  margin: 16px 0 22px;
}
.result-stats .stat {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(155,77,255,0.3);
  border-radius: 10px; padding: 10px 14px; min-width: 92px;
}
.result-stats .stat .v { font-size: 22px; color: var(--neon-lime); font-variant-numeric: tabular-nums; }
.result-stats .stat .k { font-size: 10px; color: var(--dim); letter-spacing: 2px; text-transform: uppercase; margin-top: 4px; }

.replay-wrap { margin: 6px 0 18px; }
.replay { width: 100%; max-height: 42vh; border-radius: 14px; border: 1px solid rgba(24,230,255,0.3); background: #000; }
.replay-msg { font-size: 12px; color: var(--dim); margin-top: 8px; letter-spacing: 1px; }

.result-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.result-actions .btn-primary { width: auto; flex: 1; min-width: 160px; font-size: 18px; padding: 14px; }

/* secondary share channels */
.share-row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 10px; }
.share-row .btn { text-decoration: none; display: inline-flex; align-items: center; }
.btn-small { padding: 8px 12px; font-size: 11px; min-height: 36px; }

/* follow-the-artist */
.btn-artist {
  display: inline-flex; align-items: center; justify-content: center;
  margin-top: 14px; text-decoration: none;
  background: linear-gradient(90deg, rgba(198,255,46,0.14), rgba(24,230,255,0.14));
  border: 1px solid var(--neon-lime); color: var(--neon-lime);
  box-shadow: 0 0 18px rgba(198,255,46,0.25);
  letter-spacing: 3px;
}
.btn-artist:hover { background: rgba(198,255,46,0.2); box-shadow: 0 0 28px rgba(198,255,46,0.5); }

/* tip jar */
.support-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.btn-tip {
  display: inline-flex; align-items: center; justify-content: center;
  margin-top: 14px; text-decoration: none;
  background: linear-gradient(90deg, rgba(255,221,0,0.14), rgba(255,45,155,0.10));
  border: 1px solid #ffdd00; color: #ffdd00;
  box-shadow: 0 0 18px rgba(255,221,0,0.22);
  letter-spacing: 3px;
}
.btn-tip:hover { background: rgba(255,221,0,0.18); box-shadow: 0 0 28px rgba(255,221,0,0.45); }
[hidden] { display: none !important; }

/* ---------- scrollbar ---------- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: var(--neon-purple); border-radius: 8px; }

/* ---------- accessibility helpers ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.cam-hint { margin-top: 8px; font-size: 11px; color: var(--dim); letter-spacing: 0.5px; line-height: 1.45; }

/* visible keyboard-focus indicator (mouse clicks stay clean via :focus-visible) */
.btn:focus-visible,
input:focus-visible,
label[for="file-input"]:focus-visible {
  outline: 3px solid var(--neon-cyan);
  outline-offset: 2px;
}
.btn { min-height: 44px; } /* comfortable touch target */

/* ---------- webcam self-preview (start screen framing aid) ---------- */
#webcam.preview {
  position: absolute;
  width: 180px; height: 135px;
  left: auto; top: auto; right: 22px; bottom: 22px;
  opacity: 1; z-index: 5;
  object-fit: cover;
  transform: scaleX(-1); /* mirror like the in-game view */
  border-radius: 12px;
  border: 2px solid var(--neon-cyan);
  box-shadow: 0 0 22px rgba(24,230,255,0.4);
}

/* ---------- countdown reduced-motion variant ---------- */
@keyframes cd-fade { 0% { opacity: 0; } 25%, 80% { opacity: 1; } 100% { opacity: 0; } }

/* ---------- responsive / small screens ---------- */
@media (max-height: 760px) {
  .final-score { font-size: clamp(44px, 12vw, 90px); }
  .replay { max-height: 32vh; }
  .start-inner, .results-inner { padding-top: 16px; }
}
@media (max-width: 480px) {
  #webcam.preview { width: 116px; height: 87px; right: 10px; bottom: 10px; }
  .result-actions .btn-primary { min-width: 120px; font-size: 16px; }
  .result-stats .stat { min-width: 72px; padding: 8px 10px; }
}

/* ---------- photosensitivity / motion safety ---------- */
@media (prefers-reduced-motion: reduce) {
  .bg-grid { animation: none; }
  .glitch::before, .glitch::after { animation: none; opacity: 0; }
  .result-headline.hi { animation: none; }
  .logo { filter: none; }
  .countdown.show { animation: cd-fade 0.85s ease forwards; }
}