:root {
  --bg: #0f0f16;
  --card: #171725;
  --card2: #202033;
  --text: #ffffff;
  --muted: #a8a8b7;
  --border: rgba(255,255,255,0.08);
  --accent: #8b5cf6;
  --accent2: #6d28d9;
  --danger: #ef4444;
  --warning: #f59e0b;
  --ok: #22c55e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  overscroll-behavior: contain;
}

body { padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom); }

button {
  appearance: none;
  border: 0;
  border-radius: 14px;
  padding: 13px 10px;
  min-height: 46px;
  background: var(--card2);
  color: var(--text);
  font-size: 14px;
  font-weight: 850;
  cursor: pointer;
  touch-action: manipulation;
}

button:active { transform: scale(0.985); }
button.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); }
button.active { outline: 2px solid #fff; background: #4f46e5; }
button.danger { background: rgba(239, 68, 68, 0.25); color: #fecaca; }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.app {
  width: min(960px, 100%);
  margin: 0 auto;
  padding: 12px;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin: 8px 0 12px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(25px, 7vw, 40px);
  letter-spacing: -0.04em;
}

.hero h1 span {
  font-size: 0.55em;
  color: var(--muted);
}

.hero p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 14px;
}

.privacy-pill, .pill {
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 14px;
  margin-bottom: 12px;
  box-shadow: 0 10px 26px rgba(0,0,0,0.24);
}

.card h2 { margin: 0 0 8px; font-size: 18px; }

.muted {
  color: var(--muted);
  line-height: 1.5;
  font-size: 13px;
  margin: 8px 0;
}

.small-muted { color: var(--muted); font-size: 12px; }
.hidden { display: none !important; }

.upload-box {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 6px;
  padding: 32px 14px;
  border-radius: 18px;
  border: 1.5px dashed rgba(255,255,255,0.24);
  background: rgba(255,255,255,0.04);
  cursor: pointer;
}

.upload-icon { font-size: 42px; }
.upload-title { font-size: 20px; font-weight: 900; }
.upload-subtitle { color: var(--muted); font-size: 13px; }

.file-info {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.top-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  margin-bottom: 10px;
}

.warning {
  border: 1px solid rgba(245, 158, 11, 0.55);
  background: rgba(245, 158, 11, 0.13);
  color: #facc15;
  padding: 10px 12px;
  border-radius: 14px;
  margin-bottom: 10px;
  line-height: 1.5;
  font-size: 13px;
}

.player-shell {
  position: relative;
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 16px 34px rgba(0,0,0,0.42);
}

.video-stage {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #000;
  touch-action: none;
}

video {
  width: 100%;
  display: block;
  transform-origin: center center;
  will-change: transform;
  user-select: none;
  -webkit-user-select: none;
}

#beatOverlay {
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 10;
  font-size: clamp(54px, 16vw, 108px);
  line-height: 1;
  font-weight: 950;
  color: #ff3b30;
  text-shadow: 4px 4px 0 #000, -2px -2px 0 #000, 2px -2px 0 #000, -2px 2px 0 #000, 2px 2px 0 #000;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 75ms linear, transform 75ms linear;
  pointer-events: none;
}

#beatOverlay.show {
  opacity: 1;
  transform: scale(1);
}

.overlay-badges {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 11;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
  max-width: 76%;
  pointer-events: none;
}

.overlay-badges span {
  background: rgba(0,0,0,0.62);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 999px;
  padding: 5px 8px;
  font-size: 12px;
}

.hint {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.section-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.progress-shell {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,0.09);
  margin: 10px 0;
}

.progress-bar {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), #ec4899);
  transition: width 120ms linear;
}

.candidate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.micro-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 8px;
}

.control-group {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.control-group:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.group-label {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.button-grid {
  display: grid;
  gap: 8px;
}

.button-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.button-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.button-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.gap-top { margin-top: 8px; }

.slider-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  margin: 12px 0 8px;
  color: var(--muted);
  font-size: 13px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }

.small-line {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 680px) {
  .app { padding: 8px; }
  .hero { flex-direction: column; }
  .button-grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .candidate-grid, .micro-grid { grid-template-columns: 1fr; }
  button { font-size: 13px; min-height: 45px; padding: 12px 8px; }
}