/* ============================================================
   SYNC VAULT — Design tokens
   ============================================================ */
:root{
  --bg:          #09090b;
  --surface:     #121215;
  --surface-2:   #17171b;
  --border:      #27272a;
  --border-soft: #1c1c20;

  --fg:          #e4e4e7;
  --fg-dim:      #a1a1aa;
  --fg-mute:     #71717a;

  --accent:      #dc2626;
  --accent-hi:   #ef4444;
  --accent-dim:  rgba(220,38,38,.14);

  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;

  --lane-h: 68px;
  --strip-w: 216px;
}

/* ============================================================
   Base
   ============================================================ */
*,*::before,*::after{ box-sizing:border-box; }
html,body{ margin:0; }
html{ -webkit-text-size-adjust:100%; }

body{
  min-height:100vh;
  font-family:var(--sans);
  font-size:15px;
  line-height:1.5;
  color:var(--fg);
  background:
    radial-gradient(900px 520px at 12% -12%, rgba(220,38,38,.10), transparent 62%),
    radial-gradient(760px 420px at 92% -4%, rgba(63,63,70,.20), transparent 62%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

body::before{
  content:'';
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%, #000 0%, transparent 78%);
}

h1,h2{ margin:0; font-weight:600; letter-spacing:-.01em; }
h1{ font-size:clamp(1.35rem, 2.4vw, 1.85rem); }
h2{ font-size:.82rem; letter-spacing:.10em; text-transform:uppercase; color:var(--fg-dim); font-family:var(--mono); font-weight:500; }
button{ font:inherit; color:inherit; }

:focus-visible{ outline:2px solid var(--accent-hi); outline-offset:2px; border-radius:4px; }

.eyebrow{
  font-family:var(--mono); font-size:11px; letter-spacing:.16em;
  text-transform:uppercase; color:var(--accent);
}

/* ============================================================
   Topbar
   ============================================================ */
.topbar{
  position:sticky; top:0; z-index:40;
  display:flex; align-items:center; justify-content:space-between; gap:18px;
  padding:14px clamp(16px, 3vw, 28px);
  border-bottom:1px solid var(--border);
  background:rgba(9,9,11,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}

.brand{ display:flex; align-items:center; gap:12px; min-width:0; }

.brand-mark{
  display:block;
  width:34px; height:34px; flex:0 0 auto;
  border-radius:var(--r-sm);
  object-fit:cover;
  overflow:hidden;
}

.brand-name{ font-size:13px; font-weight:600; letter-spacing:.14em; }
.brand-sub{
  font-family:var(--mono); font-size:10px; letter-spacing:.14em;
  color:var(--fg-mute); text-transform:uppercase; margin-top:2px;
}

.topbar-actions{ display:flex; align-items:center; gap:10px; }

.status{
  font-family:var(--mono); font-size:10.5px; letter-spacing:.12em;
  padding:6px 10px; border-radius:99px;
  border:1px solid var(--border);
  color:var(--fg-mute); background:rgba(255,255,255,.02);
  white-space:nowrap;
}
.status[data-state="ready"]{ color:#4ade80; border-color:rgba(74,222,128,.25); background:rgba(74,222,128,.07); }
.status[data-state="busy"]{ color:#fbbf24; border-color:rgba(251,191,36,.25); background:rgba(251,191,36,.07); }

/* ============================================================
   Buttons
   ============================================================ */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:9px 16px; border-radius:var(--r-sm);
  font-family:var(--mono); font-size:11px; font-weight:500;
  letter-spacing:.12em; text-transform:uppercase;
  border:1px solid var(--border); background:transparent;
  color:var(--fg-dim); cursor:pointer; text-decoration:none;
  transition:background .15s, color .15s, border-color .15s, transform .1s;
  white-space:nowrap;
}
.btn:hover{ color:var(--fg); border-color:#3f3f46; background:rgba(255,255,255,.04); }
.btn:active{ transform:translateY(1px); }

.btn-primary{
  background:var(--accent); border-color:var(--accent); color:#fff;
}
.btn-primary:hover{ background:var(--accent-hi); border-color:var(--accent-hi); color:#fff; }

/* ============================================================
   Shell
   ============================================================ */
.shell{
  position:relative; z-index:1;
  max-width:1180px; margin:0 auto;
  padding:clamp(20px, 3.2vw, 36px) clamp(16px, 3vw, 28px) 64px;
  display:grid; gap:18px;
}

.panel{
  background:linear-gradient(180deg, var(--surface), #0f0f12);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
}

.player{ padding:clamp(16px, 2.4vw, 26px); }

/* ---------- Track head ---------- */
.track-head{
  display:flex; flex-wrap:wrap; align-items:flex-start;
  justify-content:space-between; gap:16px 24px;
  padding-bottom:20px; border-bottom:1px solid var(--border-soft);
}
.track-id{ min-width:0; }
.track-id .eyebrow{ margin-bottom:6px; }
.track-artist{ margin-top:5px; font-size:13px; color:var(--fg-mute); }

.chips{ display:flex; flex-wrap:wrap; gap:6px; max-width:100%; }

.chip{
  display:inline-flex; align-items:baseline; gap:7px;
  padding:5px 9px; border-radius:var(--r-sm);
  border:1px solid var(--border); background:rgba(255,255,255,.02);
  font-family:var(--mono); font-size:10.5px; letter-spacing:.09em;
  text-transform:uppercase; color:var(--fg-mute); white-space:nowrap;
}
.chip b{ color:var(--fg); font-weight:500; letter-spacing:.04em; }

/* ---------- Transport ---------- */
.transport{
  display:flex; align-items:center; gap:16px;
  padding:16px 0 14px;
}

.btn-play{
  display:grid; place-items:center;
  width:52px; height:52px; flex:0 0 auto;
  border-radius:50%;
  border:1px solid var(--accent);
  background:var(--accent-dim); color:var(--accent-hi);
  cursor:pointer;
  transition:background .15s, color .15s, box-shadow .2s, transform .1s;
}
.btn-play:hover:not(:disabled){ background:var(--accent); color:#fff; box-shadow:0 0 0 5px rgba(220,38,38,.14); }
.btn-play:active:not(:disabled){ transform:scale(.96); }
.btn-play:disabled{ opacity:.4; cursor:not-allowed; }

.btn-play .ico-pause{ display:none; }
.btn-play.is-playing .ico-play{ display:none; }
.btn-play.is-playing .ico-pause{ display:block; }

.timecode{
  font-family:var(--mono); font-size:13px; letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
  color:var(--fg-dim);
  display:flex; align-items:baseline; gap:6px;
}
#time-now{ color:var(--fg); font-weight:500; }
.time-sep{ color:var(--fg-mute); }

.transport-spacer{ flex:1 1 auto; }

.master-vol{ display:flex; align-items:center; gap:10px; }
.master-vol span{
  font-family:var(--mono); font-size:10px; letter-spacing:.12em; color:var(--fg-mute);
}

/* ---------- Ruler ---------- */
.ruler-row{ display:flex; }
.strip-spacer{ flex:0 0 var(--strip-w); }

.ruler{
  position:relative; flex:1 1 auto;
  height:20px;
}
.ruler .tick{
  position:absolute; top:0; transform:translateX(-50%);
  font-family:var(--mono); font-size:9.5px; letter-spacing:.08em;
  color:var(--fg-mute); font-variant-numeric:tabular-nums;
  padding-top:9px; white-space:nowrap;
}
.ruler .tick::before{
  content:''; position:absolute; top:0; left:50%;
  width:1px; height:5px; background:var(--border);
}
.ruler .tick.is-first{ transform:none; }
.ruler .tick.is-first::before{ left:0; }

/* ---------- Stem rows ---------- */
.lanes{ display:grid; gap:6px; }

.stem-row{
  display:flex; gap:12px; align-items:stretch;
  border-radius:var(--r-md);
  transition:opacity .18s;
}
.stem-row.is-dimmed{ opacity:.42; }

.strip{
  flex:0 0 var(--strip-w);
  display:flex; flex-direction:column; justify-content:center; gap:9px;
  padding:10px 12px;
  border-radius:var(--r-md);
  border:1px solid var(--border-soft);
  background:rgba(255,255,255,.014);
  min-width:0;
}

.strip-top{ display:flex; align-items:center; justify-content:space-between; gap:8px; }

.strip-label{
  font-family:var(--mono); font-size:11px; letter-spacing:.13em;
  text-transform:uppercase; color:var(--fg-dim); font-weight:500;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}

.strip-btns{ display:flex; gap:4px; flex:0 0 auto; }

.ms-btn{
  width:22px; height:22px; padding:0;
  display:grid; place-items:center;
  font-family:var(--mono); font-size:10px; font-weight:700;
  border-radius:4px; border:1px solid var(--border);
  background:transparent; color:var(--fg-mute);
  cursor:pointer;
  transition:background .12s, color .12s, border-color .12s;
}
.ms-btn:hover{ color:var(--fg); border-color:#3f3f46; }
.ms-btn.is-on[data-act="mute"]{ background:var(--accent); border-color:var(--accent); color:#fff; }
.ms-btn.is-on[data-act="solo"]{ background:#eab308; border-color:#eab308; color:#0a0a0a; }

.lane{
  flex:1 1 auto; min-width:0;
  height:var(--lane-h);
  border-radius:var(--r-md);
  border:1px solid var(--border-soft);
  background:rgba(255,255,255,.012);
  overflow:hidden;
  cursor:crosshair;
  touch-action:none;
}
.lane canvas{ display:block; width:100%; height:100%; }

/* ---------- Clearance bar ---------- */
.clearance{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between;
  gap:16px; margin-top:22px; padding-top:20px;
  border-top:1px solid var(--border-soft);
}
.clearance-copy{ font-size:13px; color:var(--fg-mute); max-width:60ch; }
.clearance-copy strong{ color:var(--fg-dim); font-weight:600; }

/* ============================================================
   Meta grid
   ============================================================ */
.meta-grid{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.meta-card{ padding:20px 22px; }
.meta-card h2{ margin-bottom:14px; }

.kv{ margin:0; display:grid; gap:9px; }
.kv > div{
  display:flex; justify-content:space-between; gap:16px;
  padding-bottom:9px; border-bottom:1px solid var(--border-soft);
  font-size:13px;
}
.kv > div:last-child{ border-bottom:0; padding-bottom:0; }
.kv dt{ color:var(--fg-mute); font-family:var(--mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; padding-top:2px; }
.kv dd{ margin:0; text-align:right; color:var(--fg); font-family:var(--mono); font-size:12px; letter-spacing:.02em; }

/* ============================================================
   Footer
   ============================================================ */
.foot{
  position:relative; z-index:1;
  max-width:1180px; margin:0 auto;
  padding:0 clamp(16px,3vw,28px) 40px;
  display:flex; flex-wrap:wrap; gap:8px;
  font-family:var(--mono); font-size:11px; letter-spacing:.07em;
  color:var(--fg-mute); text-transform:uppercase;
}
.foot-sep{ opacity:.4; }

/* ============================================================
   Range inputs
   ============================================================ */
input[type="range"]{
  -webkit-appearance:none; appearance:none;
  height:20px; background:transparent; cursor:pointer;
}
input[type="range"]::-webkit-slider-runnable-track{
  height:3px; border-radius:99px; background:var(--border);
}
input[type="range"]::-moz-range-track{
  height:3px; border-radius:99px; background:var(--border);
}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none;
  width:11px; height:11px; margin-top:-4px; border-radius:50%;
  background:var(--fg-dim); border:0; transition:background .12s;
}
input[type="range"]::-moz-range-thumb{
  width:11px; height:11px; border-radius:50%;
  background:var(--fg-dim); border:0;
}
input[type="range"]:hover::-webkit-slider-thumb{ background:var(--accent); }
input[type="range"]:hover::-moz-range-thumb{ background:var(--accent); }

.master-vol input[type="range"]{ width:110px; }
.strip-gain{ width:100%; }

/* ============================================================
   Modal
   ============================================================ */
.modal{
  position:fixed; inset:0; z-index:100;
  display:grid; place-items:center;
  padding:20px;
}
.modal[hidden]{ display:none; }

.modal-backdrop{
  position:absolute; inset:0;
  background:rgba(5,5,7,.78);
  backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);
  animation:fade .16s ease-out;
}

.modal-card{
  position:relative;
  width:min(620px, 100%);
  max-height:min(88vh, 780px);
  display:flex; flex-direction:column;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  box-shadow:0 30px 80px rgba(0,0,0,.7);
  animation:rise .2s cubic-bezier(.2,.9,.3,1);
}

@keyframes fade{ from{opacity:0} }
@keyframes rise{ from{opacity:0; transform:translateY(14px) scale(.985)} }

.modal-head{
  display:flex; align-items:flex-start; justify-content:space-between; gap:16px;
  padding:20px 22px 16px; border-bottom:1px solid var(--border-soft);
}
.modal-head h2{
  font-family:var(--sans); font-size:1.15rem; font-weight:600;
  letter-spacing:-.01em; text-transform:none; color:var(--fg);
  margin-top:6px;
}
.modal-x{
  width:30px; height:30px; flex:0 0 auto;
  display:grid; place-items:center;
  border-radius:var(--r-sm); border:1px solid transparent;
  background:transparent; color:var(--fg-mute);
  font-size:19px; line-height:1; cursor:pointer;
}
.modal-x:hover{ color:var(--fg); border-color:var(--border); }

.modal-body{ padding:20px 22px; overflow-y:auto; display:grid; gap:16px; }

.field-grid{ display:grid; grid-template-columns:1fr 1fr; gap:12px; }

.field{ display:grid; gap:6px; min-width:0; }
.field > span{
  font-family:var(--mono); font-size:10px; letter-spacing:.11em;
  text-transform:uppercase; color:var(--fg-mute);
}
.field input, .field select, .field textarea{
  width:100%; padding:9px 11px;
  font-family:var(--sans); font-size:13px; color:var(--fg);
  background:var(--surface-2);
  border:1px solid var(--border);
  border-radius:var(--r-sm);
  transition:border-color .15s, background .15s;
}
.field textarea{ resize:vertical; min-height:56px; }
.field input::placeholder, .field textarea::placeholder{ color:#52525b; }
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color:var(--accent); background:#1b1b20;
}
.field select{ cursor:pointer; }

.preview{
  margin:0; padding:14px;
  font-family:var(--mono); font-size:11px; line-height:1.65;
  color:var(--fg-dim); white-space:pre-wrap; word-break:break-word;
  background:#0b0b0e;
  border:1px solid var(--border-soft);
  border-radius:var(--r-sm);
  max-height:220px; overflow-y:auto;
}

.modal-foot{
  display:flex; flex-wrap:wrap; justify-content:flex-end; gap:8px;
  padding:16px 22px; border-top:1px solid var(--border-soft);
}

/* ============================================================
   Toast
   ============================================================ */
.toast{
  position:fixed; left:50%; bottom:26px; z-index:120;
  transform:translate(-50%, 16px);
  padding:11px 18px; border-radius:99px;
  background:#18181b; border:1px solid var(--border);
  color:var(--fg-dim);
  font-family:var(--mono); font-size:11.5px; letter-spacing:.06em;
  opacity:0; pointer-events:none;
  transition:opacity .2s, transform .2s;
  box-shadow:0 12px 32px rgba(0,0,0,.55);
}
.toast.is-visible{ opacity:1; transform:translate(-50%, 0); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 880px){
  :root{ --strip-w:100%; }
  .meta-grid{ grid-template-columns:1fr; }
  .field-grid{ grid-template-columns:1fr; }

  .ruler-row{ display:none; }

  .stem-row{ flex-direction:column; gap:6px; }
  .strip{
    flex-direction:row; align-items:center; justify-content:space-between;
    padding:8px 10px;
  }
  .strip-top{ gap:12px; }
  .strip-gain{ width:120px; flex:0 0 auto; }
}

@media (max-width: 560px){
  .brand-sub{ display:none; }
  .topbar-actions .btn{ padding:8px 11px; font-size:10px; }
  .status{ display:none; }
  .transport{ gap:12px; }
  .master-vol{ display:none; }
  .clearance{ flex-direction:column; align-items:stretch; }
  .clearance .btn{ width:100%; }
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
}