/* Element Lab gallery chrome. The scene itself paints the whole viewport; this
   is only the text layer sitting on top of it. */

:root {
  --ink: #eef1f8;
  --ink-dim: #9aa3b8;
  --ink-faint: #5c6478;
  --line: rgba(255, 255, 255, 0.10);
  --bg: #04050a;
  --accent: #7fb0ff;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

lab-scene {
  position: fixed;
  inset: 0;
  display: block;
}

/* No WebGL: the element sets this, so the page still has a sensible ground. */
lab-scene[data-state='unsupported'] {
  background:
    radial-gradient(circle at 30% 30%, #241d3d 0, transparent 55%),
    radial-gradient(circle at 70% 70%, #16203d 0, transparent 55%),
    var(--bg);
}

/* Keeps the text readable over whatever the shader is doing underneath. */
.scrim {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 18% 88%, rgba(4, 5, 10, 0.88) 0%, rgba(4, 5, 10, 0) 62%),
    linear-gradient(to bottom, rgba(4, 5, 10, 0.72) 0%, rgba(4, 5, 10, 0) 26%);
}

/* ---------------------------------------------------------------- topbar */

.topbar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.1rem 1.6rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--ink-dim);
  text-decoration: none;
}
.brand b { color: var(--ink); font-weight: 600; }
.brand:hover { color: var(--ink); }

.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.tabs { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.tab {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
  backdrop-filter: blur(8px);
}
.tab:hover { color: var(--ink); border-color: rgba(255, 255, 255, 0.24); }
.tab.is-active { color: #04050a; background: var(--ink); border-color: var(--ink); }
.tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.perf {
  margin-left: auto;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  min-width: 4.6rem;
  text-align: center;
  backdrop-filter: blur(8px);
}

/* --------------------------------------------------------------- readout */

.readout {
  position: absolute;
  left: 1.9rem;
  bottom: 4.1rem;
  max-width: 33rem;
  pointer-events: none;
}

.readout h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(2.1rem, 5.2vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
  text-wrap: balance;
}

.readout p {
  margin: 0 0 1rem;
  font-size: 0.94rem;
  line-height: 1.62;
  color: var(--ink-dim);
  text-wrap: pretty;
}

.tags {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  list-style: none; margin: 0 0 1.1rem; padding: 0;
}
.tags li {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(127, 176, 255, 0.28);
  background: rgba(127, 176, 255, 0.07);
  padding: 0.24rem 0.6rem;
  border-radius: 4px;
}

.stats {
  display: grid;
  grid-template-columns: auto auto;
  gap: 0.28rem 1rem;
  margin: 0;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
}
.stats dt { color: var(--ink-faint); }
.stats dd { margin: 0; color: var(--ink); text-align: right; }

/* ---------------------------------------------------------------- footer */

.hint {
  position: absolute;
  left: 1.9rem;
  bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  pointer-events: none;
}
.hint code { color: var(--ink-dim); }

kbd {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.05rem 0.34rem;
  margin-right: 0.15rem;
  font-family: inherit;
  font-size: 0.68rem;
  color: var(--ink-dim);
}

@media (max-width: 760px) {
  .topbar { padding: 0.9rem 1.1rem; gap: 0.75rem; }
  .brand span:last-child { display: none; }
  .readout { left: 1.1rem; right: 1.1rem; bottom: 3.4rem; max-width: none; }
  .stats { display: none; }
  .hint { left: 1.1rem; font-size: 0.62rem; }
}

@media (prefers-reduced-motion: reduce) {
  .tab { transition: none; }
}

/* ---------------------------------------------------------- control panel */

.panel {
  position: absolute;
  top: 4.6rem;
  right: 1.6rem;
  width: 17.5rem;
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
  padding: 1rem 1.1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(8, 10, 18, 0.72);
  backdrop-filter: blur(14px);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.panel-head h2 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.ghost {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  cursor: pointer;
  transition: color 140ms ease, border-color 140ms ease;
}
.ghost:hover { color: var(--ink); border-color: rgba(255, 255, 255, 0.26); }
.ghost:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.controls { display: flex; flex-direction: column; gap: 0.7rem; }
.controls:empty { display: none; }

.control {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: 'label value' 'input input';
  gap: 0.3rem 0.5rem;
  align-items: center;
}

.control-label {
  grid-area: label;
  font-size: 0.78rem;
  color: var(--ink-dim);
}

.control-value {
  grid-area: value;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.control input[type='range'] {
  grid-area: input;
  width: 100%;
  height: 2px;
  appearance: none;
  background: rgba(255, 255, 255, 0.16);
  border-radius: 2px;
  cursor: pointer;
}

.control input[type='range']::-webkit-slider-thumb {
  appearance: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #04050a;
  cursor: pointer;
}

.control input[type='range']::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border: 2px solid #04050a;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.control input[type='range']:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.control input[type='color'] { grid-area: input; width: 100%; height: 1.7rem; background: none; border: 1px solid var(--line); border-radius: 5px; cursor: pointer; }
.control input[type='checkbox'] { grid-area: input; justify-self: start; accent-color: var(--accent); }

.snippet-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
}

.snippet {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  line-height: 1.5;
  color: var(--ink-dim);
  overflow-wrap: anywhere;
}

@media (max-width: 1040px) {
  .panel { display: none; }
}

.control-select {
  grid-area: input;
  width: 100%;
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.28rem 0.5rem;
  cursor: pointer;
}
.control-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Structural knobs rebuild GPU buffers, so they commit on release rather than
   while dragging. The marker explains why they behave differently. */
.control.is-structural .control-label::after {
  content: ' (rebuilds)';
  color: var(--ink-faint);
  font-size: 0.66rem;
}

/* A select has no numeric readout, so let the label use the full width. */
.control:has(.control-select) {
  grid-template-columns: 1fr;
  grid-template-areas: 'label' 'input';
}
.control:has(.control-select) .control-value { display: none; }