.studio {
  position: relative;
  z-index: 2;
  padding: 0 var(--space-4) var(--space-8);
}

.studio-frame {
  position: relative;
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
}

.studio-note {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--space-2);
  padding-bottom: var(--space-1);
  color: var(--crt-text);
  font-family: var(--font-crt);
  font-size: var(--text-lg);
  line-height: 1.4;
  letter-spacing: var(--crt-tracking);
  text-shadow: 0 0 8px var(--crt-halo);
}

.studio-note > * {
  white-space: nowrap;
}

.studio-warn {
  color: var(--crt-warn);
  text-shadow: 0 0 10px var(--crt-warn);
}

.studio-fit {
  margin-inline-start: auto;
  padding: 0;
  background: none;
  border: 0;
  font: inherit;
  letter-spacing: inherit;
  text-shadow: inherit;
  cursor: pointer;
}

.studio-fit:hover {
  color: var(--crt-core);
  text-shadow: 0 0 10px rgb(var(--crt-tint) / 0.8);
}

.studio-fit.is-stuck {
  cursor: default;
}

.studio-fit.is-stuck:hover {
  color: var(--crt-warn);
  text-shadow: 0 0 10px var(--crt-warn);
}

/* Outline rather than border, so a full-width frame does not overflow its column. */
.studio .nixie-text {
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
  outline: 1px solid rgb(var(--crt-tint) / 0.7);
  box-shadow: 0 0 20px color-mix(in srgb, var(--nixie-lit) 50%, transparent);
}

.panel {
  position: fixed;
  z-index: 3;
  top: 5rem;
  left: 0;
  width: 24rem;
  font-size: var(--text-xl);
  line-height: 1.2;
  color-scheme: dark;
  translate: -100% 0;
  transition: translate var(--duration) var(--ease);
}

.panel.is-open {
  translate: 0 0;
}

.panel-form,
.panel-toggle {
  background-color: var(--panel-bg);
  background-image:
    repeating-linear-gradient(0deg, rgb(0 0 0 / 0.4) 0 1px, transparent 1px 3px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 0.55 0 0 0 0 0 0 0 0 0.16 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"),
    radial-gradient(ellipse at 50% 35%, rgb(var(--crt-tint) / 0.1), transparent 75%);
  border: 1px solid var(--panel-line);
  box-shadow:
    inset 0 0 2.5rem rgb(0 0 0 / 0.85),
    0 0 1.25rem rgb(var(--crt-tint) / 0.1);
}

.panel-form {
  display: grid;
  gap: var(--space-4);
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
  padding: var(--space-5);
  border-left: 0;
  border-radius: 0 var(--panel-radius) var(--panel-radius) 0;
  outline: 1px solid var(--panel-rule);
  outline-offset: -0.4rem;
  scrollbar-color: var(--panel-line) transparent;
  scrollbar-width: thin;
}

.panel-toggle {
  position: absolute;
  top: var(--space-4);
  left: 100%;
  padding: var(--space-3) var(--space-1);
  border-left: 0;
  border-radius: 0 var(--panel-radius) var(--panel-radius) 0;
  writing-mode: vertical-rl;
  letter-spacing: var(--crt-tracking);
  cursor: pointer;
}

.panel-field {
  display: grid;
  grid-template-columns: 1fr var(--panel-control);
  align-items: center;
  gap: var(--space-1) var(--space-2);
}

.panel-field.wide {
  grid-template-columns: auto 1fr;
}

.panel-field input[type='range'] {
  grid-column: 1 / -1;
}

.panel input[type='number'],
.panel input[type='text'] {
  width: 100%;
  padding: 0 var(--space-1);
  background: var(--panel-bg);
  border: 1px solid var(--panel-line);
  border-radius: 2px;
  text-align: right;
  -moz-appearance: textfield;
}

.panel input[type='number']::-webkit-inner-spin-button,
.panel input[type='number']::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

.panel input[type='text'] {
  text-transform: uppercase;
}

.panel-color {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--space-2);
}

.panel input[type='color'] {
  width: 100%;
  height: 100%;
  padding: 2px;
  background: none;
  border: 1px solid var(--panel-line);
  border-radius: 2px;
  cursor: pointer;
}

.panel input[type='color']::-webkit-color-swatch-wrapper { padding: 0 }
.panel input[type='color']::-webkit-color-swatch { border: 0 }
.panel input[type='color']::-moz-color-swatch { border: 0 }

.panel output {
  text-align: right;
}

.panel-choice {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.panel-field.ratio {
  grid-template-columns: 1fr;
}

.panel-field.ratio .panel-choice {
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-1);
}

.panel-choice label {
  position: relative;
  padding: 0.1rem 0;
  border-inline: 1px solid var(--panel-line);
  text-align: center;
  opacity: 0.55;
  cursor: pointer;
}

.panel-choice label:hover {
  opacity: 0.85;
}

.panel-choice label:has(:checked) {
  background:
    repeating-linear-gradient(0deg, rgb(0 0 0 / 0.75) 0 1px, transparent 1px 3px),
    radial-gradient(farthest-side, rgb(var(--crt-tint) / 0.75), rgb(var(--crt-tint) / 0.25) 60%, rgb(var(--crt-tint) / 0.05));
  border-color: var(--crt-text);
  color: var(--crt-core);
  opacity: 1;
}

.panel-choice label:has(:focus-visible) {
  outline: 1px dashed var(--crt-text);
  outline-offset: 2px;
}

.panel-choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* Fader: a recessed slot, lit up to a ridged cap. The cap is a physical object rather than part
   of the CRT palette, so its colors live here; both engines' thumb pseudo-elements inherit them. */
.panel input[type='range'] {
  --cap: 1.75rem;
  --p: 0;
  --fader-slot: #120800;
  --fader-edge: #3d1c00;
  --fader-gloss: rgb(255 240 200 / 0.6);
  --fader-face:
    repeating-linear-gradient(90deg, rgb(60 25 0 / 0.8) 0 1px, rgb(255 240 200 / 0.5) 1px 2px, transparent 2px 4px) center / 15px 50% no-repeat,
    linear-gradient(#ffc45c, #e07f00) #e8920a;
  width: 100%;
  height: 1.25rem;
  background: none;
  appearance: none;
  cursor: pointer;
}

.panel input[type='range']::-webkit-slider-runnable-track {
  height: 0.5rem;
  background:
    repeating-linear-gradient(0deg, rgb(0 0 0 / 0.55) 0 1px, transparent 1px 3px),
    linear-gradient(90deg, rgb(var(--crt-tint) / 0.75) calc(var(--p, 0) * (100% - var(--cap)) + var(--cap) / 2), var(--fader-slot) 0);
  border: 1px solid var(--panel-line);
  border-radius: 1px;
  box-shadow: inset 0 1px 3px #000;
}

.panel input[type='range']::-webkit-slider-thumb {
  width: var(--cap);
  height: 1.125rem;
  margin-top: calc(0.25rem - 1px - 1.125rem / 2);
  background: var(--fader-face);
  border: 1px solid var(--fader-edge);
  border-radius: 2px;
  box-shadow:
    inset 0 1px 0 var(--fader-gloss),
    inset 0 -2px 0 rgb(80 30 0 / 0.35),
    0 2px 3px #000,
    0 0 8px var(--crt-halo);
  appearance: none;
}

.panel input[type='range']::-moz-range-track {
  height: 0.5rem;
  background: var(--fader-slot);
  border: 1px solid var(--panel-line);
  border-radius: 1px;
  box-shadow: inset 0 1px 3px #000;
}

.panel input[type='range']::-moz-range-progress {
  height: 0.5rem;
  background: rgb(var(--crt-tint) / 0.75);
}

.panel input[type='range']::-moz-range-thumb {
  width: var(--cap);
  height: 1.125rem;
  background: var(--fader-face);
  border: 1px solid var(--fader-edge);
  border-radius: 2px;
  box-shadow: inset 0 1px 0 var(--fader-gloss), 0 2px 3px #000, 0 0 8px var(--crt-halo);
}

.panel-save {
  padding: var(--space-2);
  background: rgb(var(--crt-tint) / 0.12);
  border: 1px solid var(--crt-text);
  border-radius: 2px;
  letter-spacing: var(--crt-tracking);
  cursor: pointer;
}

.panel-save:hover {
  background: rgb(var(--crt-tint) / 0.24);
}

.panel-save:disabled {
  opacity: 0.5;
  cursor: progress;
}

.panel-more {
  position: relative;
}

.panel-reset {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0;
  background: none;
  border: 0;
  letter-spacing: var(--crt-tracking);
  opacity: 0.7;
  cursor: pointer;
}

.panel-reset:enabled {
  opacity: 1;
}

.panel-reset:disabled {
  cursor: default;
}

.panel-reset:enabled:hover {
  color: var(--crt-core);
  text-shadow: 0 0 10px rgb(var(--crt-tint) / 0.8);
}

.panel-advanced summary {
  width: fit-content;
  list-style: none;
  letter-spacing: var(--crt-tracking);
  cursor: pointer;
}

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

.panel-advanced summary::before {
  content: '[+] ';
}

.panel-advanced[open] summary::before {
  content: '[−] ';
}

.panel-group {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: 0;
  border: 0;
  border-top: 1px dashed var(--panel-line);
}

.panel-group legend {
  padding-right: var(--space-2);
  font-size: var(--text-base);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.7;
}

@media (max-width: 40rem) {
  .studio-note {
    font-size: var(--text-base);
  }

  .panel {
    inset: auto 0 0;
    width: auto;
    translate: 0 100%;
  }

  .panel-form {
    max-height: 60vh;
    padding-bottom: max(var(--space-5), env(safe-area-inset-bottom));
    border: 1px solid var(--panel-line);
    border-bottom: 0;
    border-radius: var(--panel-radius) var(--panel-radius) 0 0;
  }

  .panel-toggle {
    top: auto;
    bottom: 100%;
    left: auto;
    right: var(--space-4);
    padding: var(--space-1) var(--space-3);
    border: 1px solid var(--panel-line);
    border-bottom: 0;
    border-radius: var(--panel-radius) var(--panel-radius) 0 0;
    writing-mode: horizontal-tb;
  }
}