/* Rive-like skin: near-black flat surfaces, hairline separators, quiet fields, blue accent. */
:root {
  --bg: #1a1a1a;
  --panel: #1f1f1f;
  --panel-2: #262626;
  --field: #171717;
  --line: #2a2a2a;
  --line-2: #363636;
  --text: #d8d8d8;
  --bright: #ffffff;
  --muted: #8d8d8d;
  --accent: #3d9bff;
  --accent-soft: rgba(61, 155, 255, 0.16);
  --playhead: #3d9bff;
  --kf: #dfe6ee;
  --ok: #3ecf8e;
  --warn: #f5b84a;
  --danger: #ff7a70;
  --label-w: 200px;
  --lane-pad: 12px;
  --radius: 4px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  grid-template-columns: minmax(0, 1fr); /* never let a wide top bar push the layout past the viewport */
  background: var(--bg);
  color: var(--text);
  font: 12px/1.4 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

button, input, select {
  font: inherit;
  color: inherit;
}

button {
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 3px 8px;
  height: 24px;
  cursor: pointer;
  color: var(--text);
}
button:hover { background: var(--panel-2); }
button:disabled { opacity: 0.35; cursor: default; background: transparent; }
button.primary { background: var(--accent); color: #fff; font-weight: 500; }
button.primary:hover { filter: brightness(1.1); }
button.ghost { font-size: 15px; padding: 0 6px; color: var(--muted); }
button.ghost:hover:not(:disabled) { color: var(--text); }
button.danger { color: var(--danger); }
button.icon { width: 26px; padding: 0; display: grid; place-items: center; color: var(--muted); }
button.icon:hover { color: var(--text); }

input, select {
  background: var(--field);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 2px 6px;
  height: 24px;
  min-width: 0;
}
input:hover, select:hover { border-color: var(--line-2); }
input:focus, select:focus { outline: none; border-color: var(--accent); }
input.invalid { border-color: var(--danger); }
input[type="number"] { font-family: var(--mono); font-variant-numeric: tabular-nums; -moz-appearance: textfield; }
input[type="number"]::-webkit-inner-spin-button, input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
select { padding-right: 18px; appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 10px) 10px, calc(100% - 6px) 10px; background-size: 4px 4px; background-repeat: no-repeat; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 20px;
  padding: 0;
  border: 0;
  background: transparent;
}
input[type="range"]:hover, input[type="range"]:focus { border: 0; }
input[type="range"]::-webkit-slider-runnable-track { height: 2px; background: var(--line-2); border-radius: 1px; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 10px; height: 10px; margin-top: -4px; border-radius: 50%; background: var(--text); }
input[type="range"]:hover::-webkit-slider-thumb, input[type="range"]:active::-webkit-slider-thumb { background: var(--accent); }
input[type="range"]::-moz-range-track { height: 2px; background: var(--line-2); }
input[type="range"]::-moz-range-thumb { width: 10px; height: 10px; border: 0; border-radius: 50%; background: var(--text); }

code { font-family: var(--mono); background: var(--panel-2); padding: 1px 5px; border-radius: 3px; font-size: 11px; }

.muted { color: var(--muted); }
.spacer { flex: 1; }
[hidden] { display: none !important; }

.logo {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--accent);
  transform: rotate(45deg);
  border-radius: 1px;
}
.logo.big { width: 24px; height: 24px; border-radius: 3px; margin-bottom: 18px; }

/* top bar */
.topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 6px 12px;
  border-bottom: 1px solid var(--line);
  background: #161616;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; letter-spacing: 0.01em; margin-right: 8px; }
.file { color: var(--muted); font-family: var(--mono); font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 40vw; direction: rtl; }
.dirty { color: var(--warn); font-size: 11px; white-space: nowrap; }

.banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  background: rgba(245, 184, 74, 0.1);
  border-bottom: 1px solid rgba(245, 184, 74, 0.3);
  color: #f3cf86;
}
.banner button { border-color: rgba(245, 184, 74, 0.4); }

/* workspace */
.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  min-height: 0;
}

.stage { display: grid; grid-template-rows: auto 1fr; min-height: 0; min-width: 0; background: #151515; }
.stage-bar { display: flex; align-items: center; gap: 10px; padding: 6px 12px; }
.seg { display: inline-flex; background: var(--field); border-radius: var(--radius); padding: 2px; }
.seg button { height: 20px; padding: 0 10px; color: var(--muted); }
.seg button.on { background: var(--line-2); color: var(--bright); }
.seg button:disabled { display: none; }
#pick.on { background: var(--accent-soft); color: var(--accent); }
.readout { font-family: var(--mono); font-size: 11px; color: var(--accent); background: var(--accent-soft); height: 20px; padding: 0 8px; white-space: nowrap; }
.readout:hover { background: var(--accent); color: #fff; }
.frame-wrap {
  position: relative;
  margin: 0 12px 12px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: repeating-conic-gradient(#1e1e1e 0% 25%, #232323 0% 50%) 0 0 / 16px 16px;
  min-height: 0;
}
iframe { width: 100%; height: 100%; border: 0; display: block; }

/* inspector */
.inspector {
  border-left: 1px solid var(--line);
  background: var(--panel);
  overflow-y: auto;
  padding-bottom: 24px;
}
.section { padding: 10px 12px 12px; border-bottom: 1px solid var(--line); }
.section h2 {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 24px;
}
.section h2 .muted, .section h2 .warn-text { font-weight: 400; font-size: 11px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 8px; }
.field { display: grid; grid-template-columns: 76px 1fr; align-items: center; gap: 6px; }
.field > span { font-size: 12px; color: var(--muted); }
.field.wide { grid-column: 1 / -1; }
.grid2 > .field { grid-template-columns: 1fr; gap: 3px; }
.grid2 > .field > span { font-size: 11px; }
.unit { position: relative; }
.unit input { width: 100%; padding-right: 28px; }
.unit::after { content: attr(data-unit); position: absolute; right: 7px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 11px; pointer-events: none; }
.easing-row { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.curve { margin-top: 6px; display: block; width: 100%; height: 64px; background: var(--field); border-radius: var(--radius); }
.note { font-size: 11px; color: var(--muted); margin: 8px 0 0; }
.note.warn { color: #f3cf86; }
.warn-text { color: var(--warn); }

/* property panel */
.section.props .rows { display: grid; gap: 1px; }
.props .group { font-size: 11px; color: var(--muted); margin: 8px 0 3px; }
.props .group:first-child { margin-top: 0; }
.prop { display: grid; grid-template-columns: 84px 1fr 16px; gap: 6px; align-items: center; padding: 2px 4px 2px 0; border-radius: var(--radius); min-height: 26px; }
.prop.wide { grid-template-columns: 1fr 16px; }
.prop.wide .editor { grid-column: 1; grid-row: 2; }
.prop.wide .key { grid-column: 2; grid-row: 1; }
.prop.wide .name { grid-column: 1; grid-row: 1; }
.prop.keyed { background: rgba(61, 155, 255, 0.07); }
.prop .name { font-size: 12px; color: var(--muted); cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-left: 4px; }
.prop.keyed .name { color: var(--text); }
.prop .key { width: 9px; height: 9px; padding: 0; border: 1.5px solid var(--muted); border-radius: 1px; background: transparent; transform: rotate(45deg); justify-self: center; opacity: 0.6; }
.prop.animated .key { border-color: var(--accent); opacity: 1; }
.prop.keyed .key { border-color: var(--accent); background: var(--accent); opacity: 1; }
.prop .key:hover { border-color: var(--bright); opacity: 1; background: var(--accent-soft); }
.prop.keyed .key:hover { background: var(--accent); }
.prop .raw { font-family: var(--mono); font-size: 11px; width: 100%; }
.prop .editor { gap: 4px; }
.prop .editor input[type="range"] { flex: 1 1 50px; min-width: 40px; }
.prop .fn input[type="range"] { flex: 1 1 100%; }
.prop .num input { width: 56px; }
.row.custom { margin-top: 10px; flex-wrap: nowrap; }
.row.custom input { flex: 1; font-family: var(--mono); font-size: 11px; }

/* structured value editors */
.editor { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.editor input[type="range"] { flex: 1 1 70px; min-width: 60px; }
.editor input[type="color"] { width: 28px; height: 22px; padding: 1px 2px; cursor: pointer; }
.editor select { font-size: 11px; height: 22px; }
.num { display: inline-flex; }
.num input { width: 62px; padding-right: 4px; border-radius: var(--radius) 0 0 var(--radius); font-family: var(--mono); font-size: 11px; }
.num input:only-child { border-radius: var(--radius); }
.num select { width: 50px; border-radius: 0 var(--radius) var(--radius) 0; font-family: var(--mono); font-size: 11px; padding: 2px 2px; background-color: #1d1d1d; }
.num .u { padding: 0 6px; height: 24px; display: grid; place-items: center; border-radius: 0 var(--radius) var(--radius) 0; color: var(--muted); font-size: 11px; background: #1d1d1d; }
.editor.fns { gap: 3px; }
.fn { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; width: 100%; }
.fn .fn-name { font-family: var(--mono); max-width: 112px; }
.fn > input { flex: 1; font-family: var(--mono); font-size: 11px; }
.fn input[type="range"] { flex: 1 1 100%; }
.fn > button { color: var(--muted); padding: 0 6px; }
.picker { color: var(--muted); }
.row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.shared { font-size: 11px; color: var(--muted); margin: -2px 0 8px; }
.empty-inspector { color: var(--muted); font-size: 11px; margin: 0; line-height: 1.5; }

/* picked element */
.section.element { background: #232323; }
.section.element h2 .ghost { font-size: 14px; padding: 0 6px; }
.el-tag { margin: 0 0 8px; }
.el-tag code { font-size: 11px; }
.section.element .field input { width: 100%; font-family: var(--mono); font-size: 11px; }
.hits { display: block; font-size: 11px; margin-top: 3px; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin: 8px 0; font-size: 11px; }
.chip { height: 20px; padding: 0 8px; border-radius: 999px; font-family: var(--mono); font-size: 11px; background: var(--panel-2); color: var(--muted); }
.chip.on { background: var(--accent-soft); color: var(--accent); }
.chip.foreign { background: transparent; border: 1px dashed var(--line-2); }
.row.create { flex-wrap: nowrap; }
.row.create input { flex: 1; font-family: var(--mono); font-size: 11px; }

/* timeline */
.timeline {
  border-top: 1px solid var(--line);
  background: var(--panel);
  display: grid;
  grid-template-rows: auto 1fr;
  grid-template-columns: minmax(0, 1fr);
  height: min(300px, 42vh);
  min-height: 160px;
}
.transport { display: flex; align-items: center; gap: 6px; min-width: 0; padding: 5px 10px; border-bottom: 1px solid var(--line); background: #1c1c1c; }
.time { font-family: var(--mono); font-size: 11px; min-width: 120px; color: var(--muted); background: var(--field); border-radius: var(--radius); padding: 3px 8px; font-variant-numeric: tabular-nums; }
.time b { color: var(--text); font-weight: 500; }
.check { display: flex; align-items: center; gap: 5px; color: var(--muted); font-size: 11px; }
.check input { height: auto; accent-color: var(--accent); }
.transport select { font-size: 11px; width: 60px; }
.hint { font-size: 11px; flex: 0 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#add-kf { color: var(--muted); white-space: nowrap; }
#add-kf:hover { color: var(--text); }

.tracks { position: relative; overflow-y: auto; overflow-x: hidden; background: #181818; }
.tl-row { display: grid; grid-template-columns: var(--label-w) 1fr; min-height: 26px; border-bottom: 1px solid #222; }
.tl-row.ruler { position: sticky; top: 0; z-index: 3; background: var(--panel); min-height: 24px; border-bottom-color: var(--line); }
.tl-label {
  padding: 0 10px;
  display: flex;
  align-items: center;
  font-size: 11px;
  color: var(--muted);
  background: var(--panel);
  border-right: 1px solid var(--line);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.tl-track { position: relative; cursor: crosshair; overflow: hidden; }
.lane { position: absolute; inset: 0 var(--lane-pad); }

/* element groups (layers) */
.tl-row.group { min-height: 28px; }
.tl-row.group .tl-label { color: var(--text); font-size: 12px; cursor: pointer; gap: 2px; padding-left: 4px; }
.tl-row.group .tl-label:hover { background: #242424; }
.tl-row.group .tl-label .el { overflow: hidden; text-overflow: ellipsis; }
.tl-row.group.current .tl-label { background: #2a2a2a; color: var(--bright); }
.tl-row.group.current .tl-track { background: rgba(255, 255, 255, 0.015); }
.tl-row.group.foreign { opacity: 0.55; }
.tl-row.group.foreign .tl-label { cursor: default; }
.fold { height: 18px; width: 18px; padding: 0; color: var(--muted); font-size: 10px; transition: transform 0.12s; }
.fold:hover { background: transparent; color: var(--text); }
.fold.open { transform: rotate(90deg); }
.fold:disabled { opacity: 0; }
.tl-label.sub { padding-left: 32px; font-family: var(--mono); }
.span { position: absolute; top: 50%; height: 14px; transform: translateY(-50%); background: rgba(255, 255, 255, 0.05); border-radius: 3px; pointer-events: none; overflow: hidden; }
.span span { display: block; padding: 0 6px; font-size: 10px; line-height: 14px; color: var(--muted); white-space: nowrap; }
.span.more { background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.05) 0 3px, transparent 3px 7px); border-radius: 0 3px 3px 0; }

.tick { position: absolute; top: 0; bottom: 0; border-left: 1px solid var(--line-2); padding-left: 4px; font-family: var(--mono); font-size: 10px; color: var(--muted); pointer-events: none; }
.tick span { display: block; margin-top: 5px; }
.tick.end { border-left: 0; border-right: 1px solid var(--line-2); padding: 0 4px 0 0; transform: translateX(-100%); text-align: right; }

.bar { position: absolute; top: 50%; height: 1px; background: var(--line-2); pointer-events: none; }
.kf {
  position: absolute;
  top: 50%;
  width: 9px;
  height: 9px;
  padding: 0;
  border: 1px solid #181818;
  border-radius: 1px;
  background: var(--kf);
  transform: translate(-50%, -50%) rotate(45deg);
  cursor: grab;
  z-index: 1;
}
.kf:hover { background: var(--bright); box-shadow: 0 0 0 2px var(--accent-soft); }
.kf.sel { background: var(--accent); border-color: var(--bright); box-shadow: 0 0 0 2px var(--accent-soft); }
.kf.ghost { background: transparent; border: 1px dashed var(--muted); cursor: default; }

.playhead-layer { position: absolute; top: 0; bottom: 0; left: calc(var(--label-w) + var(--lane-pad)); right: var(--lane-pad); pointer-events: none; z-index: 4; }
.playhead { position: absolute; top: 0; bottom: 0; width: 0; border-left: 1px solid var(--playhead); }
.playhead::before { content: ""; position: absolute; top: 0; left: -5px; border: 5px solid transparent; border-top: 7px solid var(--playhead); border-bottom: 0; }

/* empty state & toast */
.empty { grid-row: 2 / -1; display: grid; place-items: center; padding: 24px; }
.empty-card { text-align: center; max-width: 460px; }
.empty-card h1 { font-size: 18px; font-weight: 500; margin: 0 0 10px; }
.empty-card p { margin: 8px 0; line-height: 1.7; }
.empty-card .cmd { display: grid; grid-template-columns: 1fr auto; gap: 4px 8px; align-items: center; text-align: left; margin: 14px 0; }
.empty-card .cmd > .muted { grid-column: 1 / -1; font-size: 11px; }
.empty-card .cmd code { display: block; padding: 8px 10px; font-size: 12px; white-space: pre-wrap; word-break: break-all; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 20px);
  background: #2b2b2b;
  border: 1px solid var(--line-2);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 12px;
  opacity: 0;
  transition: 0.2s;
  pointer-events: none;
  z-index: 10;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 760px) {
  .workspace { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .inspector { border-left: 0; border-top: 1px solid var(--line); max-height: 40vh; }
  .hint { display: none; }
  :root { --label-w: 120px; }
}