/* Timestretch Studio — studio-grade dark UI */

:root {
  color-scheme: dark;
  --bg: #080b12;
  --bg-2: #0c111b;
  --panel: rgba(20, 26, 38, 0.72);
  --panel-solid: #121826;
  --panel-border: rgba(140, 155, 185, 0.16);
  --panel-border-strong: rgba(140, 155, 185, 0.3);
  --text: #eef3fb;
  --muted: #93a0b8;
  --faint: #5d6a82;
  --accent: #58a6ff;
  --accent-2: #a371f7;
  --orig: #58a6ff;
  --proc: #2dd4bf;
  --danger: #ff6b6b;
  --ok: #34d399;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --grad: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-feature-settings: "cv11", "ss01";
}

* { box-sizing: border-box; }

/* The [hidden] attribute must win over component display rules below
   (author display:grid/flex/block would otherwise override the UA rule). */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(1100px 600px at 12% -8%, rgba(88, 166, 255, 0.16), transparent 60%),
    radial-gradient(1000px 700px at 100% 0%, rgba(163, 113, 247, 0.14), transparent 55%),
    radial-gradient(900px 900px at 50% 120%, rgba(45, 212, 191, 0.08), transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

.app {
  min-height: 100%;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 14px;
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 18px clamp(14px, 3vw, 28px) 14px;
}

/* ---------- topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo { width: 44px; height: 44px; filter: drop-shadow(0 4px 14px rgba(88, 166, 255, 0.4)); }
.brand-text h1 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  font-weight: 800;
}
.brand-text h1 span {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 0.84rem; }
.topbar-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.78rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.topbar-meta .pill {
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--panel-border);
}
.topbar-meta .pill.live { color: var(--ok); border-color: rgba(52, 211, 153, 0.4); }

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 372px;
  gap: 14px;
  align-items: start;
}
.stage { display: grid; gap: 14px; min-width: 0; }

/* ---------- panels ---------- */
.panel, .dropzone, .filebar, .lane, .transport {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px) saturate(120%);
  -webkit-backdrop-filter: blur(20px) saturate(120%);
}

/* ---------- dropzone ---------- */
.dropzone {
  padding: 8px;
  min-height: 320px;
  display: grid;
  place-items: center;
}
.dropzone.drag-over { border-color: var(--accent); background: rgba(88, 166, 255, 0.1); }
.dropzone-inner {
  width: 100%;
  height: 100%;
  min-height: 300px;
  border: 1.5px dashed rgba(120, 140, 175, 0.3);
  border-radius: var(--radius-sm);
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 10px;
  text-align: center;
  padding: 30px;
}
.drop-art { width: 160px; color: var(--accent); opacity: 0.9; }
.dropzone-inner strong { font-size: 1.3rem; letter-spacing: -0.02em; }
.dropzone-inner small { color: var(--muted); letter-spacing: 0.02em; }
.drop-actions { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; justify-content: center; }

/* ---------- filebar ---------- */
.filebar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  flex-wrap: wrap;
}
.file-info { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.file-name { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-meta { color: var(--muted); font-size: 0.8rem; font-variant-numeric: tabular-nums; }

/* ---------- lanes ---------- */
.lanes { display: grid; gap: 10px; }
.lane { padding: 12px 14px 10px; }
.lane-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.86rem;
  margin-bottom: 8px;
  color: var(--text);
}
.dot { width: 9px; height: 9px; border-radius: 50%; box-shadow: 0 0 10px currentColor; }
.dot.orig { background: var(--orig); color: var(--orig); }
.dot.proc { background: var(--proc); color: var(--proc); }
.lane-dur { margin-left: auto; color: var(--faint); font-weight: 600; font-variant-numeric: tabular-nums; }
.render-badge {
  margin-left: 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 700;
}
.spin {
  width: 11px; height: 11px;
  border: 2px solid rgba(88, 166, 255, 0.3);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.lane-canvas {
  position: relative;
  height: clamp(108px, 15vh, 168px);
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0.08));
  border: 1px solid rgba(255, 255, 255, 0.04);
}
.lane-canvas canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}
.lane-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--faint);
  font-size: 0.8rem;
}
.ruler {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--faint);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  padding: 2px 4px 0;
}
.hovertime { color: var(--accent); font-weight: 700; }
.lane-hint { margin: 2px 2px 0; color: var(--faint); font-size: 0.72rem; text-align: center; }

/* ---------- transport ---------- */
.transport {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 16px;
  flex-wrap: wrap;
}
.transport-main { display: flex; align-items: center; gap: 10px; }
.transport-seek {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 240px;
}
.time { color: var(--muted); font-size: 0.82rem; font-variant-numeric: tabular-nums; min-width: 64px; }
.time:last-child { text-align: right; }

/* ---------- controls ---------- */
.controls { display: grid; gap: 12px; position: sticky; top: 14px; }
.panel { padding: 16px; display: grid; gap: 12px; }
.panel-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.panel-head h2 { margin: 0; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.13em; color: var(--muted); font-weight: 800; }
.panel output { font-variant-numeric: tabular-nums; font-weight: 800; color: var(--accent); font-size: 0.95rem; }
.hint { margin: 0; color: var(--faint); font-size: 0.76rem; line-height: 1.5; }
.mini { font-size: 0.72rem; color: var(--muted); font-weight: 600; margin-top: 2px; }
.mini-out { font-size: 0.8rem !important; text-align: right; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 6px 11px;
  border-radius: 9px;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: 140ms ease;
  font-variant-numeric: tabular-nums;
}
.chip:hover { border-color: var(--accent); color: #fff; }
.chip.active { background: var(--grad); border-color: transparent; color: #06111f; }

.grid-two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { display: grid; gap: 6px; font-size: 0.78rem; color: var(--muted); font-weight: 600; }
.field > span { letter-spacing: 0.01em; }

.switch { display: flex; align-items: center; gap: 9px; font-size: 0.82rem; cursor: pointer; user-select: none; }
.switch input { width: 18px; height: 18px; accent-color: var(--accent-2); }

.export.panel { background: linear-gradient(160deg, rgba(163, 113, 247, 0.12), var(--panel)); }
.block { width: 100%; }

.progress {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--grad);
  transition: width 120ms linear;
}

/* ---------- buttons ---------- */
button { font: inherit; cursor: pointer; transition: 150ms ease; }
button:disabled { opacity: 0.4; cursor: not-allowed; }

.primary {
  border: 0;
  border-radius: 11px;
  padding: 11px 18px;
  font-weight: 800;
  color: #06111f;
  background: var(--grad);
  box-shadow: 0 8px 22px rgba(88, 166, 255, 0.28);
}
.primary:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.06); }

.ghost {
  border: 1px solid var(--panel-border-strong);
  border-radius: 11px;
  padding: 11px 16px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  font-weight: 700;
}
.ghost:hover:not(:disabled) { border-color: var(--accent); }
.ghost.small { padding: 8px 13px; font-size: 0.82rem; }

.round {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  border: 1px solid var(--panel-border-strong);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}
.round svg { width: 22px; height: 22px; fill: currentColor; }
.round:hover:not(:disabled) { border-color: var(--accent); color: #fff; }
.round.primary { border: 0; color: #06111f; background: var(--grad); box-shadow: 0 8px 22px rgba(88, 166, 255, 0.28); }
.round.primary:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.06); }
.round.primary svg { fill: #06111f; }
.round.active { background: var(--grad); border-color: transparent; color: #06111f; box-shadow: 0 6px 18px rgba(163, 113, 247, 0.35); }
.round.active svg { fill: #06111f; }

/* segmented */
.view-switch, .ab { display: inline-flex; padding: 3px; gap: 3px; border-radius: 11px; background: rgba(0, 0, 0, 0.25); border: 1px solid var(--panel-border); }
.seg {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 7px 14px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.82rem;
}
.seg:hover { color: var(--text); }
.seg.active { background: rgba(255, 255, 255, 0.1); color: #fff; box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06) inset; }

/* ---------- range inputs ---------- */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 24px;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(88, 166, 255, 0.55), rgba(163, 113, 247, 0.55)), rgba(255, 255, 255, 0.08);
  background-blend-mode: normal;
}
input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  margin-top: -7px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
}
input[type="range"]:disabled { opacity: 0.4; }

select {
  font: inherit;
  width: 100%;
  color: var(--text);
  background: var(--panel-solid);
  border: 1px solid var(--panel-border-strong);
  border-radius: 10px;
  padding: 9px 11px;
  font-weight: 600;
}
select:focus, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- statusbar ---------- */
.statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--panel-border);
  color: var(--muted);
  font-size: 0.8rem;
  flex-wrap: wrap;
}
#status.error { color: var(--danger); }
#status.ok { color: var(--ok); }
.kbd-hints { color: var(--faint); font-size: 0.74rem; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .controls { position: static; }
  .grid-two { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .brand-text h1 { font-size: 1.25rem; }
  .tagline { display: none; }
  .transport { gap: 12px; }
  .transport-seek { order: 3; width: 100%; }
  .kbd-hints { display: none; }
}