/* ===========================================================================
   Studio — the optical bench.

   Layout is a fixed control column against an open stage, deliberately
   asymmetric: the beam gets the room, the controls get just enough. Structure
   comes from hairlines rather than cards or shadows, so nothing floats.
   =========================================================================== */

html,
body {
  height: 100%;
}

body {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background: var(--bench-void);
  overflow: hidden;
}

/* --- Top rail ------------------------------------------------------------- */

.rail {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0 var(--space-lg) 0 var(--space-md);
  height: 3.25rem;
  background: var(--bench-base);
  border-bottom: 1px solid var(--rule);
}

.rail__mark {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  letter-spacing: 0.012em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out);
}

.rail__mark:hover {
  color: var(--brass);
}

.rail__divider {
  width: 1px;
  height: 1.25rem;
  background: var(--rule);
}

.rail__name {
  flex: 1 1 auto;
  min-width: 0;
}

.rail__name input {
  width: 100%;
  max-width: 22rem;
  padding: var(--space-2xs) var(--space-xs);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
  font-size: var(--text-body);
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.rail__name input:hover {
  border-color: var(--rule);
  color: var(--ink);
}

.rail__name input:focus {
  border-color: var(--brass-dim);
  color: var(--ink);
  outline: none;
}

.rail__readout {
  display: flex;
  align-items: baseline;
  gap: var(--space-lg);
}

.readout {
  display: flex;
  align-items: baseline;
  gap: var(--space-2xs);
}

.readout__val {
  font-size: var(--text-body);
  color: var(--ink);
}

.readout__key {
  font-size: var(--text-micro);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.rail__actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex: none;
}

.rail__account {
  padding: var(--space-2xs) var(--space-xs);
  background: none;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--ink-faint);
  font-size: var(--text-small);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}

.rail__account:hover {
  color: var(--ink);
  border-bottom-color: var(--rule-bright);
}

.rail__account[data-signed-in='true'] {
  color: var(--ink-muted);
}

/* --- Sheet ----------------------------------------------------------------
   Sign-in is the one place a modal earns its keep: a short blocking task the
   user started, which must hand them back the exact loop they were building.
   A separate page would discard unsaved parameters. */

.sheet {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: start center;
  padding: clamp(1rem, 8vh, 6rem) var(--space-md);
  background: oklch(0.1 0.005 65 / 0.72);
  animation: sheet-in var(--dur-mid) var(--ease-out);
}

.sheet[hidden] {
  display: none;
}

.sheet__panel {
  width: min(26rem, 100%);
  background: var(--bench-panel);
  border: 1px solid var(--rule-bright);
  border-radius: var(--radius-lg);
  animation: panel-in var(--dur-mid) var(--ease-out);
}

@keyframes sheet-in {
  from { opacity: 0; }
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(-6px); }
}

.sheet__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-md) var(--space-sm);
  border-bottom: 1px solid var(--rule-soft);
}

.sheet__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
}

.sheet__close {
  padding: 0 var(--space-2xs);
  background: none;
  border: none;
  color: var(--ink-faint);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out);
}

.sheet__close:hover {
  color: var(--ink);
}

.sheet__body {
  padding: var(--space-md);
}

.sheet__lead {
  margin-bottom: var(--space-sm);
  color: var(--ink);
}

.sheet__note {
  font-size: var(--text-small);
  line-height: 1.5;
  color: var(--ink-faint);
}

/* --- OAuth ----------------------------------------------------------------
   Google keeps its own mark and colours: it is a recognised sign-in control,
   and restyling it into the bench palette would make it less trustworthy, not
   more consistent. */

.oauth {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
  color: var(--ink-inverse);
  font-size: var(--text-body);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}

.oauth:hover {
  background: #fff;
  border-color: #fff;
}

.oauth__mark {
  flex: none;
}

/* A labelled rule, so the two routes read as alternatives rather than a stack
   of competing buttons. */
.or {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
  font-size: var(--text-micro);
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.or::before,
.or::after {
  content: '';
  flex: 1 1 auto;
  height: 1px;
  background: var(--rule);
}

/* --- Forms ---------------------------------------------------------------- */

.form__row {
  display: block;
  margin-bottom: var(--space-md);
}

.form__row input {
  width: 100%;
  margin-top: var(--space-2xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--bench-raised);
  border: 1px solid var(--rule-bright);
  border-radius: var(--radius-sm);
  color: var(--ink);
  transition: border-color var(--dur-fast) var(--ease-out);
}

.form__row input:focus {
  border-color: var(--brass-dim);
  outline: none;
}

.form__error {
  min-height: 1.25rem;
  margin-bottom: var(--space-xs);
  font-size: var(--text-small);
  color: var(--signal-hot);
}

.form__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

/* --- Project list --------------------------------------------------------- */

.projects {
  margin: 0;
  padding: 0;
  list-style: none;
}

.projects__row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  border-bottom: 1px solid var(--rule-soft);
}

.projects__row:last-child {
  border-bottom: none;
}

.projects__open {
  flex: 1 1 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-2xs);
  background: none;
  border: none;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out);
}

.projects__open:hover {
  color: var(--brass);
}

.projects__meta {
  flex: none;
  font-size: var(--text-micro);
  color: var(--ink-faint);
}

.projects__delete {
  flex: none;
}

/* --- Bench ---------------------------------------------------------------- */

.bench {
  display: grid;
  grid-template-columns: 21rem minmax(0, 1fr);
  min-height: 0;
}

/* --- Controls ------------------------------------------------------------- */

.controls {
  overflow-y: auto;
  padding-bottom: var(--space-xl);
  background: var(--bench-base);
  border-right: 1px solid var(--rule);
  scrollbar-width: thin;
  scrollbar-color: var(--rule-bright) transparent;
}

.controls::-webkit-scrollbar {
  width: 9px;
}

.controls::-webkit-scrollbar-thumb {
  background: var(--rule-bright);
  border-radius: 99px;
  border: 3px solid var(--bench-base);
}

.group {
  padding: var(--space-md) var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--rule-soft);
}

.group__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.group__note {
  margin-bottom: var(--space-md);
  font-size: var(--text-small);
  line-height: 1.45;
  color: var(--ink-faint);
}

/* Disabled sections stay visible — hiding them makes the panel jump and hides
   what the toggle actually controls. */
.group__body[data-disabled='true'] {
  opacity: 0.38;
  pointer-events: none;
}

.group--advanced {
  border-bottom: none;
}

.group--advanced > summary {
  cursor: pointer;
  margin-bottom: 0;
  list-style: none;
  padding: var(--space-md) var(--space-md) var(--space-md);
}

.group--advanced > summary::-webkit-details-marker {
  display: none;
}

.group--advanced > summary::after {
  content: '+';
  color: var(--ink-faint);
  font-size: 1rem;
}

.group--advanced[open] > summary::after {
  content: '–';
}

.group--advanced > *:not(summary) {
  padding-inline: var(--space-md);
}

/* --- Fields --------------------------------------------------------------- */

.field + .field {
  margin-top: var(--space-md);
}

.field__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.field__val {
  font-size: var(--text-small);
  color: var(--ink);
}

.hint {
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink-faint);
  opacity: 0.75;
}

.field--inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.field--seg {
  margin: var(--space-md) 0 0;
  padding: 0;
  border: 0;
}

.field--seg legend {
  margin-bottom: var(--space-xs);
  padding: 0;
}

/* --- Sliders --------------------------------------------------------------
   A thin machined track with a fader-style thumb, not a lollipop. */

input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 18px;
  background: transparent;
  cursor: pointer;
}

input[type='range']::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--rule-bright);
  border-radius: 2px;
}

input[type='range']::-moz-range-track {
  height: 2px;
  background: var(--rule-bright);
  border-radius: 2px;
}

input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 5px;
  height: 15px;
  margin-top: -6.5px;
  background: var(--brass);
  border: none;
  border-radius: 1px;
  transition: background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}

input[type='range']::-moz-range-thumb {
  width: 5px;
  height: 15px;
  background: var(--brass);
  border: none;
  border-radius: 1px;
}

input[type='range']:hover::-webkit-slider-thumb {
  transform: scaleY(1.15);
}

input[type='range']:active::-webkit-slider-thumb {
  background: var(--ink);
}

/* --- Segmented control ---------------------------------------------------- */

.seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.seg button {
  padding: var(--space-xs) var(--space-2xs);
  background: var(--bench-panel);
  border: none;
  color: var(--ink-muted);
  font-size: var(--text-small);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.seg button:hover {
  background: var(--bench-raised);
  color: var(--ink);
}

.seg button[aria-checked='true'] {
  background: var(--brass-wash);
  color: var(--brass);
  box-shadow: inset 0 -2px 0 var(--brass);
}

/* --- Motion stack ---------------------------------------------------------
   Each motion is a small module on the bench, stacked in the order it is
   applied. Hairlines separate them; nothing is a card. */

.motions:empty {
  display: none;
}

.motion {
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--rule-soft);
}

.motion:first-child {
  border-top: none;
}

.motion__head {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.motion__name {
  flex: 1 1 auto;
  font-size: var(--text-small);
  color: var(--ink);
}

.motion__btn {
  flex: none;
  width: 20px;
  height: 20px;
  padding: 0;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--ink-faint);
  font-size: 0.8rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}

.motion__btn:hover:not(:disabled) {
  color: var(--brass);
  border-color: var(--rule-bright);
}

.motion__btn:disabled {
  opacity: 0.25;
  cursor: default;
}

.motion__btn--x:hover:not(:disabled) {
  color: var(--signal-hot);
}

.motion__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-top: var(--space-2xs);
}

.motion__val {
  font-size: var(--text-small);
  color: var(--ink-muted);
}

/* --- Add-motion menu ------------------------------------------------------ */

.motion-menu {
  display: grid;
  gap: 1px;
  margin-top: var(--space-sm);
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.motion-menu[hidden] {
  display: none;
}

.motion-menu__item {
  display: grid;
  gap: 1px;
  padding: var(--space-xs) var(--space-sm);
  background: var(--bench-panel);
  border: none;
  color: var(--ink);
  font-size: var(--text-small);
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out);
}

.motion-menu__item:hover {
  background: var(--bench-raised);
}

.motion-menu__hint {
  font-size: var(--text-micro);
  line-height: 1.35;
  color: var(--ink-faint);
}

/* --- Select --------------------------------------------------------------- */

select {
  width: 100%;
  margin-top: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--bench-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: var(--text-small);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out);
}

select:hover {
  border-color: var(--rule-bright);
}

/* --- Toggle --------------------------------------------------------------- */

.toggle {
  position: relative;
  display: inline-flex;
  flex: none;
  cursor: pointer;
}

.toggle input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}

.toggle__track {
  width: 30px;
  height: 16px;
  background: var(--bench-raised);
  border: 1px solid var(--rule-bright);
  border-radius: 99px;
  transition: background var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out);
}

.toggle__track::after {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  margin: 2px;
  background: var(--ink-faint);
  border-radius: 99px;
  transition: transform var(--dur-mid) var(--ease-out), background var(--dur-mid) var(--ease-out);
}

.toggle input:checked + .toggle__track {
  background: var(--brass-wash);
  border-color: var(--brass-dim);
}

.toggle input:checked + .toggle__track::after {
  background: var(--brass);
  transform: translateX(14px);
}

.toggle input:focus-visible + .toggle__track {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

/* --- Swatches ------------------------------------------------------------- */

.field--swatches {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.swatch {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
}

.swatch input[type='color'] {
  -webkit-appearance: none;
  appearance: none;
  width: 30px;
  height: 22px;
  padding: 0;
  background: none;
  border: 1px solid var(--rule-bright);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.swatch input[type='color']::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.swatch input[type='color']::-webkit-color-swatch {
  border: none;
  border-radius: 1px;
}

.swatch[hidden] {
  display: none;
}

/* --- Buttons -------------------------------------------------------------- */

.btn {
  padding: var(--space-2xs) var(--space-sm);
  background: var(--bench-raised);
  border: 1px solid var(--rule-bright);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: var(--text-small);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.btn:hover {
  border-color: var(--brass-dim);
  color: var(--brass);
}

.btn--ghost {
  background: transparent;
}

/* The one filled button on the page: exporting is the point of the tool. */
.btn--primary {
  flex: none;
  background: var(--brass);
  border-color: var(--brass);
  color: var(--ink-inverse);
  font-weight: 500;
}

.btn--primary:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--ink-inverse);
}

.btn--primary:disabled {
  opacity: 0.45;
  cursor: default;
}

/* --- Presets --------------------------------------------------------------
   A wrapped row of text chips rather than a grid of preview cards: the canvas
   is right there, and one click shows the real thing far better than a
   thumbnail would. */

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
}

.presets button {
  padding: var(--space-2xs) var(--space-xs);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
  font-size: var(--text-small);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.presets button:hover {
  border-color: var(--brass-dim);
  color: var(--brass);
}

.group--presets {
  padding-bottom: var(--space-md);
}

.btn--tiny {
  padding: 2px var(--space-xs);
  font-size: var(--text-micro);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- Stage ---------------------------------------------------------------- */

.stage {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  min-width: 0;
  background: var(--bench-void);
}

.stage__well {
  position: relative;
  min-height: 0;
  margin: var(--space-lg) var(--space-lg) var(--space-sm);
  background: var(--bench-stage);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

#stage {
  width: 100%;
  height: 100%;
}

/* --- Transport ------------------------------------------------------------ */

.transport {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-lg) var(--space-2xs);
}

.playbtn {
  display: grid;
  place-items: center;
  flex: none;
  width: 30px;
  height: 30px;
  padding: 0;
  background: var(--bench-raised);
  border: 1px solid var(--rule-bright);
  border-radius: var(--radius-sm);
  color: var(--ink);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.playbtn:hover {
  border-color: var(--brass-dim);
  color: var(--brass);
}

.playbtn > svg {
  grid-area: 1 / 1;
}

/* One button, two glyphs — swapped by state rather than by rebuilding markup. */
.playbtn__pause,
.playbtn[aria-pressed='true'] .playbtn__play {
  display: none;
}

.playbtn[aria-pressed='true'] {
  color: var(--brass);
  border-color: var(--brass-dim);
}

.playbtn[aria-pressed='true'] .playbtn__pause {
  display: block;
}

.scrub {
  flex: 1 1 auto;
  min-width: 0;
  display: block;
}

.scrub input[type='range'] {
  width: 100%;
}

.transport__count {
  flex: none;
  min-width: 5.5rem;
  text-align: right;
  font-size: var(--text-small);
  color: var(--ink-muted);
}

.stage__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 0 var(--space-lg) var(--space-md);
}

.overlays {
  display: flex;
  gap: var(--space-md);
}

.check {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-size: var(--text-small);
  color: var(--ink-faint);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out);
}

.check:hover {
  color: var(--ink-muted);
}

.check input {
  accent-color: var(--brass);
  cursor: pointer;
}

.stage__hint {
  font-size: var(--text-small);
  color: var(--ink-faint);
  transition: color var(--dur-fast) var(--ease-out);
}

.stage__hint[data-tone='ok'] {
  color: var(--brass);
}

.stage__hint[data-tone='bad'] {
  color: var(--signal-hot);
}

/* --- Status strip --------------------------------------------------------- */

.status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding: var(--space-xs) var(--space-lg);
  height: 2.5rem;
  background: var(--bench-base);
  border-top: 1px solid var(--rule);
}

.status__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.status__val {
  font-size: var(--text-small);
  color: var(--ink);
}

.status__unit {
  font-size: var(--text-micro);
  color: var(--ink-faint);
}

.meter {
  position: relative;
  width: 9rem;
  height: 3px;
  background: var(--bench-raised);
  border-radius: 2px;
  overflow: hidden;
}

.meter__fill {
  height: 100%;
  width: 0%;
  background: var(--signal-ok);
  transition: width var(--dur-mid) var(--ease-out), background var(--dur-mid) var(--ease-out);
}

.meter__fill[data-verdict='warn'] {
  background: var(--signal-warn);
}

.meter__fill[data-verdict='hot'] {
  background: var(--signal-hot);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-small);
  color: var(--ink-muted);
}

.badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 99px;
  background: var(--signal-ok);
}

.badge[data-ok='false'] {
  color: var(--signal-hot);
}

.badge[data-ok='false'] .badge__dot {
  background: var(--signal-hot);
}

/* --- Narrow screens -------------------------------------------------------
   Adapt rather than amputate: the stage moves above the controls and both
   scroll, so every parameter is still reachable on a tablet. */

@media (max-width: 60rem) {
  body {
    overflow: auto;
  }

  .bench {
    grid-template-columns: 1fr;
  }

  .stage {
    order: -1;
    min-height: 58vh;
  }

  .controls {
    border-right: none;
    border-top: 1px solid var(--rule);
  }

  .rail__readout {
    display: none;
  }
}

@media (max-width: 34rem) {
  .status__unit {
    display: none;
  }

  .stage__well {
    margin-inline: var(--space-sm);
  }

  .stage__foot {
    flex-wrap: wrap;
    padding-inline: var(--space-sm);
  }
}