/* Lab page — five interaction experiments (Solid, built to /lab/lab.js).
 * Everything here consumes semantic tokens; no raw palette values. */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

body.lab kbd,
.lab-preview kbd {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 0 var(--space-1);
  background: var(--bg-subtle);
  border: 1px solid var(--border-default);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn:disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
}

/* ── Experiment shell ── */
/* Matches the homepage lab-preview gap (--space-12) so the demos keep
 * the same rhythm on both pages. */
.experiment + .experiment {
  margin-top: var(--space-12);
}

.experiment-desc {
  margin-top: var(--space-3);
  max-width: var(--measure-prose);
  color: var(--text-secondary);
}

.experiment-desc:empty {
  display: none;
}

/* The "try it" hint — the one line that tells a visitor what to actually
 * do with each demo. */
.experiment-try {
  margin-top: var(--space-3);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  max-width: var(--measure-prose);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* An invitation, not a status — so it's a quiet accent mark rather than a
 * filled chip, and it stays out of the eyebrow's way. */
.try-label {
  flex: none;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-default);
}

.experiment-body {
  margin-top: var(--space-6);
}

/* Raised, not default: in dark mode --surface-default collapses to the same
 * oat-900 as the bands these demos sit on (the homepage embeds them in a
 * band-oat section), so a default-surface card would vanish into its band.
 * --surface-raised (oat-800) keeps the card's edge; in light both are oat-0. */
.experiment-demo {
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

.experiment-source {
  margin-top: var(--space-3);
}

/* Padding (not margin) so the extra room below an opened source block
 * can't collapse away against the next section's margin. */
.experiment-source[open] {
  padding-bottom: var(--space-8);
}

/* A disclosure, not a call to action — the filled pill outshouted the demo
 * it sits under. Mono stays: the filename is data. */
.experiment-source summary {
  display: inline-block;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.experiment-source summary:hover {
  color: var(--accent-strong);
}

.code-window {
  margin-top: var(--space-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-raised);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-default);
}

.code-window-lights {
  display: inline-flex;
  gap: 6px;
}

/* macOS traffic-light colors — intentionally not theme tokens, they stay
 * the same in both themes just like the real thing. */
.light {
  width: 13px;
  height: 13px;
  border-radius: var(--radius-full);
  border: none;
  padding: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1;
  color: transparent;
  transition: color var(--duration-fast) var(--ease-out);
}

.light-close {
  background: #ff5f57;
}

.light-min {
  background: #febc2e;
}

.light-max {
  background: #28c840;
}

/* Glyphs appear when the bar is hovered or a light is focused, like the
 * real ones. */
.code-window-bar:hover .light,
.light:focus-visible {
  color: rgba(0, 0, 0, 0.55);
}

.code-window.is-minimized .experiment-code {
  display: none;
}

.code-window.is-maximized .experiment-code {
  max-height: none;
}

.code-window-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.code-copy {
  margin-left: auto;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0;
  transition: background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.code-copy:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.code-copy.is-copied {
  color: var(--status-success);
  border-color: var(--status-success);
}

.experiment-code {
  margin: 0;
  max-height: 26rem;
  overflow: auto;
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  tab-size: 2;
}

.tok-comment {
  color: var(--text-muted);
  font-style: italic;
}

.tok-string {
  color: var(--status-success);
}

.tok-number {
  color: var(--accent-2-strong);
}

.tok-keyword {
  color: var(--accent-strong);
}

/* ── Shared keyframes ── */
@keyframes lab-fade-in {
  from {
    opacity: 0;
  }
}

@keyframes lab-fade-out {
  to {
    opacity: 0;
  }
}

@keyframes lab-pop-in {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
  }
}

@keyframes lab-blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

@keyframes lab-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}

/* ── 01 · Command palette ── */
.palette-kbd {
  margin-left: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.palette-backdrop {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--scrim);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: grid;
  justify-items: center;
  align-items: start;
  padding: 12vh var(--space-4) var(--space-4);
  animation: lab-fade-in var(--duration-fast) var(--ease-out);
}

.palette-backdrop.is-leaving {
  animation: lab-fade-out var(--duration-fast) var(--ease-out) forwards;
}

.palette {
  width: min(560px, 100%);
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: lab-pop-in var(--duration-base) var(--ease-spring);
}

.palette-input {
  width: 100%;
  padding: var(--space-4);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-default);
  border-radius: 0;
  font: inherit;
  color: var(--text-primary);
  caret-color: var(--accent-default);
}

/* The input is the palette's only focus stop; the caret and the dialog
 * frame carry the focus signal, so the ring would just double up. */
.palette-input:focus-visible {
  outline: none;
}

.palette-input::placeholder {
  color: var(--text-muted);
}

.palette-list {
  list-style: none;
  margin: 0;
  padding: var(--space-2);
  max-height: 20rem;
  overflow: auto;
}

.palette-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  cursor: pointer;
}

.palette-item.is-active {
  background: var(--accent-soft);
}

.palette-hit {
  color: var(--accent-strong);
  font-weight: var(--weight-semibold);
}

.palette-hint {
  flex: none;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.palette-empty {
  padding: var(--space-4);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.palette-footer {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--border-default);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ── 02 · Ghost text ── */
.ghost-wrap {
  position: relative;
  width: min(480px, 100%);
  background: var(--surface-default);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
}

.ghost-wrap:focus-within {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.ghost-input,
.ghost-underlay {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  line-height: var(--leading-normal);
  padding: var(--space-3) var(--space-4);
}

.ghost-underlay {
  position: absolute;
  inset: 0;
  white-space: pre;
  overflow: hidden;
  pointer-events: none;
}

/* The underlay mirrors the typed text invisibly so the completion starts
 * exactly where the caret is; the input sits on top with no background. */
.ghost-typed {
  color: transparent;
}

.ghost-completion {
  color: var(--text-muted);
}

.ghost-input {
  position: relative;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-primary);
  caret-color: var(--accent-default);
}

.ghost-input:focus-visible {
  outline: none; /* the wrap's focus-within ring covers it */
}

.ghost-hint {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ── 03 · Animated diff ── */
.adiff-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.adiff-file {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.adiff-code {
  background: var(--bg-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-4) 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

.adiff-line {
  display: flex;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  max-height: 2em;
  transition: max-height var(--duration-base) var(--ease-out),
    opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    padding var(--duration-base) var(--ease-out);
  transition-delay: calc(var(--line-index) * 45ms);
}

.adiff-line.is-hidden {
  max-height: 0;
  opacity: 0;
  transform: translateX(-8px);
  overflow: hidden;
}

.adiff-gutter {
  flex: none;
  width: 1.5ch;
  text-align: center;
  color: var(--text-muted);
  user-select: none;
}

.adiff-line-add {
  background: var(--status-success-soft);
}

.adiff-line-add .adiff-gutter {
  color: var(--status-success);
}

.adiff-line-del {
  background: var(--status-error-soft);
}

.adiff-line-del .adiff-gutter {
  color: var(--status-error);
}

.adiff-caption {
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ── 04 · Streaming tokens ── */
.stream-stage {
  position: relative;
  min-height: 10rem;
  background: var(--bg-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.stream-text {
  max-width: var(--measure-prose);
}

.stream-caret {
  display: inline-block;
  width: 0.55ch;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: text-bottom;
  background: var(--accent-default);
  animation: lab-blink 1.1s steps(1) infinite;
}

.stream-caret.is-thinking {
  background: var(--accent-2-default);
  animation: lab-pulse 1.1s var(--ease-in-out) infinite;
}

.stream-thinking-chip {
  display: inline-block;
  margin-left: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  background: var(--accent-2-soft);
  color: var(--accent-2-strong);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  animation: lab-pulse 1.4s var(--ease-in-out) infinite;
}

.stream-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.stream-controls {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.stream-speed {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* Colors and thumb come from the shared input[type="range"] rule in base.css. */
.stream-speed input[type="range"] {
  width: 10rem;
}

.stream-speed-value {
  min-width: 5ch;
}

/* ── 05 · Motion toy ── */
.toy-arena {
  display: grid;
  place-items: center;
  min-height: 15rem;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background-image: radial-gradient(var(--border-default) 1px, transparent 1px);
  background-size: var(--space-4) var(--space-4);
}

.toy-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-6) var(--space-8);
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.toy-card.is-dragging {
  cursor: grabbing;
  box-shadow: var(--shadow-lg);
}

.toy-card-title {
  font-weight: var(--weight-semibold);
}

.toy-card-sub {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.toy-controls {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.toy-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4) var(--space-3);
}

.toy-group[disabled] {
  opacity: 0.5;
}

.toy-group legend {
  padding: 0 var(--space-1);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.toy-radio {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  cursor: pointer;
}

.toy-radio input {
  accent-color: var(--accent-default);
}

.toy-readout {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.toy-readout code {
  font-family: var(--font-mono);
}

/* ── 06 · Ragdoll in a box ── */
.smiski-arena {
  position: relative;
  height: 26rem;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--bg-subtle), var(--surface-default) 70%);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

.smiski-arena:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.smiski-arena canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.smiski-fallback {
  display: grid;
  place-items: center;
  height: 100%;
  padding: var(--space-6);
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.smiski-controls {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.smiski-button {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  background: var(--surface-default);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}

.smiski-button:hover {
  background: var(--surface-hover);
}

.smiski-readout {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.smiski-readout code {
  font-family: var(--font-mono);
}