/* Chrome is true neutral grey: no tinted darks, which would bias how the picture is judged.
   The accent is not red: red belongs to the HUD. The video is the loud thing on screen. */
:root {
  --bg: #161616; --panel: #1f1f1f; --raised: #262626; --edge: #333; --edge-hi: #444;
  --ink: #d2d2d2; --dim: #8a8a8a; --faint: #5c5c5c;
  --accent: #6fa8dc; --ok: #7fbf7f; --warn: #d9b35c; --bad: #e08a6a;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 13px/1.45 system-ui, "Segoe UI", sans-serif; font-variant-numeric: tabular-nums;
  display: grid; grid-template-rows: auto 1fr auto; overflow: hidden;
}
button, .btn {
  background: var(--raised); color: var(--ink); border: 1px solid var(--edge); border-radius: 3px;
  padding: 5px 12px; font: inherit; cursor: pointer; white-space: nowrap;
}
button:hover:not(:disabled) { border-color: var(--edge-hi); }
a { color: var(--accent); }
a.btn { color: var(--ink); text-decoration: none; }
button.primary { border-color: var(--accent); color: var(--accent); }
button.primary:hover:not(:disabled) { background: var(--accent); color: #111; }
button:disabled { opacity: .4; cursor: default; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
input[type=number] {
  width: 84px; background: var(--bg); color: var(--ink); border: 1px solid var(--edge);
  border-radius: 3px; padding: 4px 6px; font: inherit;
}

/* Top bar */
.top { display: flex; align-items: center; gap: 12px; padding: 8px 12px; background: var(--panel); border-bottom: 1px solid var(--edge); }
.brand { font-weight: 600; letter-spacing: .02em; color: var(--dim); margin-right: 4px; }
.clip-info { color: var(--dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.clip-info b { color: var(--ink); font-weight: 500; }
.spacer { flex: 1; }
.sys { font-size: 12px; color: var(--dim); display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--faint); display: inline-block; }
.dot.ok { background: var(--ok); } .dot.warn { background: var(--warn); } .dot.bad { background: var(--bad); }

/* Work area */
.work { display: grid; grid-template-columns: 1fr 272px; min-height: 0; }
.stage { position: relative; display: grid; place-items: center; background: #0b0b0b; min-width: 0; min-height: 0; }
.stage canvas { display: block; }
.drop {
  width: min(560px, 90%); padding: 28px 30px; border: 1px dashed var(--edge-hi); border-radius: 6px;
  color: var(--dim); text-align: center; line-height: 1.6;
}
.drop h2 { color: var(--ink); font-size: 15px; font-weight: 600; margin: 0 0 6px; }
.drop p { margin: 8px 0; }
.drop .err { color: var(--bad); text-align: left; background: #2a2220; border-radius: 4px; padding: 10px 12px; }
.drop .problems { color: var(--warn); text-align: left; }
.stage.dragging .drop { border-color: var(--accent); color: var(--ink); }
.busy { color: var(--dim); }

.panel { background: var(--panel); border-left: 1px solid var(--edge); overflow-y: auto; padding: 12px 14px 40px; }
.panel section { margin-bottom: 20px; }
.panel h3 { font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); margin: 0 0 8px; }
.panel dl { display: grid; grid-template-columns: auto 1fr; gap: 3px 10px; margin: 0; }
.panel dt { color: var(--dim); } .panel dd { margin: 0; text-align: right; overflow-wrap: anywhere; }
.panel .row { display: flex; align-items: center; gap: 8px; margin: 6px 0; }
.panel .note { color: var(--dim); font-size: 12px; margin: 6px 0 0; }

/* Transport */
.transport { display: grid; grid-template-columns: auto auto auto auto 1fr; align-items: start; gap: 12px; padding: 8px 12px; background: var(--panel); border-top: 1px solid var(--edge); }
.transport .tc { font-family: var(--mono); font-size: 15px; letter-spacing: .02em; }
.transport .fr { font-family: var(--mono); color: var(--dim); min-width: 150px; }
.transport .steps { display: flex; gap: 4px; }
.transport .steps button { padding: 4px 10px; }
input[type=range] { width: 100%; accent-color: var(--accent); }

/* Lanes under the transport: cut markers over the scrubber, the cut-signal graph below */
.lanes { position: relative; display: grid; gap: 4px; min-width: 0; }
.markers { position: absolute; left: 0; right: 0; top: -2px; height: 8px; pointer-events: none; }
.markers .cut {
  position: absolute; top: 0; width: 3px; height: 8px; margin-left: -1.5px; padding: 0; border: 0; border-radius: 1px;
  background: var(--accent); pointer-events: auto; cursor: pointer;
}
.markers .cut.manual { background: var(--ok); }
.markers .cut.removed { background: transparent; outline: 1px solid var(--faint); height: 4px; top: 2px; }
.markers .cut.sel { background: var(--ink); width: 5px; margin-left: -2.5px; height: 12px; top: -2px; }
.lane { width: 100%; height: 10px; display: block; cursor: pointer; }
.graph { width: 100%; height: 56px; display: block; background: var(--bg); border: 1px solid var(--edge); border-radius: 3px; cursor: crosshair; }
label.check { display: flex; gap: 8px; align-items: center; padding: 2px 0; }
label.check input { accent-color: var(--accent); }
kbd { font: 11px var(--mono); border: 1px solid var(--edge-hi); border-radius: 3px; padding: 0 4px; color: var(--ink); }
.warnline { color: var(--warn); }

/* Side panel tabs and generated controls */
.tabs { display: flex; gap: 2px; margin: -12px -14px 12px; padding: 0 8px; border-bottom: 1px solid var(--edge); position: sticky; top: -12px; background: var(--panel); z-index: 1; }
.tabs button { background: none; border: 0; border-bottom: 2px solid transparent; border-radius: 0; padding: 10px 10px 8px; color: var(--dim); }
.tabs button[aria-selected=true] { color: var(--ink); border-bottom-color: var(--accent); }
.ctl { display: block; margin: 8px 0; }
.ctl .top { display: flex; justify-content: space-between; color: var(--dim); }
.ctl .val { color: var(--ink); font-family: var(--mono); font-size: 12px; }
.ctl.changed .name::after { content: " •"; color: var(--accent); }
.ctl-select, .ctl-colour, .ctl-text { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px; color: var(--dim); }
.ctl-toggle { display: flex; gap: 8px; align-items: center; }
.ctl input[type=checkbox] { accent-color: var(--accent); }
select, input[type=text] { background: var(--bg); color: var(--ink); border: 1px solid var(--edge); border-radius: 3px; padding: 3px 6px; font: inherit; max-width: 150px; }
input[type=color] { width: 44px; height: 24px; padding: 0 2px; background: var(--bg); border: 1px solid var(--edge); border-radius: 3px; }
.look-btn { width: 100%; text-align: left; font-weight: 600; }
.look-menu { border: 1px solid var(--edge-hi); border-radius: 4px; margin-top: 4px; background: var(--raised); }
.look-item { display: block; width: 100%; text-align: left; border: 0; border-bottom: 1px solid var(--edge); border-radius: 0; white-space: normal; padding: 7px 10px; }
.look-item span { display: block; color: var(--dim); font-size: 12px; }
.look-item:hover, .look-item:focus-visible { background: var(--edge); }
.advanced summary { cursor: pointer; color: var(--dim); font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; margin: 8px 0; }
.adv-group h4 { font-size: 12px; color: var(--dim); margin: 12px 0 2px; font-weight: 600; }
.seg { display: inline-flex; border: 1px solid var(--edge); border-radius: 3px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 5px 10px; }
.seg button[aria-pressed=true] { background: var(--edge-hi); color: var(--ink); }
#play { min-width: 58px; }

.keys { width: 420px; }
.keys h3 { margin: 0 0 8px; font-size: 13px; }
.keys dl { display: grid; grid-template-columns: auto 1fr; gap: 5px 14px; margin: 0; }
.keys dt { white-space: nowrap; } .keys dd { margin: 0; color: var(--dim); }
.look-empty { color: var(--dim); font-size: 12px; margin: 0 0 10px; }

/* Check frame */
.check-dlg { width: 92vw; height: 88vh; padding: 0; }
.check-dlg[open] { display: grid; grid-template-rows: auto 1fr; }
.check-head { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-bottom: 1px solid var(--edge); }
.check-head h2 { margin: 0; }
.pan { overflow: auto; cursor: grab; background: #0b0b0b; }
.pan.dragging { cursor: grabbing; }
.pan canvas { display: block; }

/* Dialogs */
dialog { background: var(--panel); color: var(--ink); border: 1px solid var(--edge-hi); border-radius: 6px; padding: 18px 20px; width: min(620px, 92vw); }
dialog::backdrop { background: rgba(0, 0, 0, .55); }
dialog h2 { margin: 0 0 10px; font-size: 15px; }
.progress { height: 4px; background: var(--edge); border-radius: 2px; overflow: hidden; margin: 12px 0 8px; }
.progress > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s linear; }
.stats { color: var(--dim); font-family: var(--mono); font-size: 12px; }
.actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.checks { list-style: none; padding: 0; margin: 10px 0 0; }
.checks li { display: grid; grid-template-columns: 22px 1fr; padding: 4px 0; border-top: 1px solid var(--edge); }
.checks li .d { color: var(--dim); font-size: 12px; grid-column: 2; }
.verdict { font-weight: 600; font-size: 14px; }
.verdict.ok, .checks .ok { color: var(--ok); } .verdict.bad, .checks .bad { color: var(--bad); } .checks .warn { color: var(--warn); }
[popover] { background: var(--panel); color: var(--ink); border: 1px solid var(--edge-hi); border-radius: 6px; padding: 12px 14px; width: 380px; }
[popover] ul { margin: 0; padding: 0; list-style: none; }
[popover] li { display: grid; grid-template-columns: 16px 1fr; gap: 6px; padding: 4px 0; align-items: baseline; }
[popover] li .dot { margin-top: 3px; }

@media (max-width: 820px) {
  .top { flex-wrap: wrap; gap: 8px; }
  .clip-info { order: 9; flex-basis: 100%; }
  .stage { overflow: auto; }
  .drop { padding: 16px; margin: 12px 0; }
  .work { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .panel { border-left: 0; border-top: 1px solid var(--edge); max-height: 32vh; }
  .transport { grid-template-columns: auto auto 1fr; }
  .transport .fr, .transport .steps { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }