@import url("https://fonts.googleapis.com/css2?family=Libre+Baskerville&display=swap");
@import url("https://cdn.jsdelivr.net/npm/@fontsource/geist@5.2.5/400.css");
@import url("https://cdn.jsdelivr.net/npm/@fontsource/geist@5.2.5/500.css");
@import url("https://cdn.jsdelivr.net/npm/@fontsource/geist@5.2.5/600.css");
@import url("https://cdn.jsdelivr.net/npm/@fontsource/geist-mono@5.2.5/400.css");
@import url("https://cdn.jsdelivr.net/npm/@fontsource/geist-mono@5.2.5/500.css");

:root {
  color: #292824;
  background: #ffffff;
  font-family: Geist, system-ui, -apple-system, sans-serif;
  font-synthesis: none;
  --font-serif: "Libre Baskerville", Georgia, serif;
  --font-sans: Geist, system-ui, -apple-system, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SFMono-Regular", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-width: 320px;
  min-height: 100%;
  margin: 0;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(28px, 9.65vw, 139px) clamp(22px, 6.6vw, 95px);
}

.shader-card {
  position: relative;
  width: min(100%, 1248px);
  height: min(623px, calc(100vh - 56px));
  min-height: 510px;
  overflow: hidden;
  isolation: isolate;
  border-radius: 15px;
  background: #e7e5e2;
  box-shadow: 0 1px 0 rgb(33 31 25 / 5%);
}

.shader-canvas,
.readability-wash {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.shader-canvas {
  z-index: 0;
  display: block;
  cursor: crosshair;
  touch-action: none;
}

.readability-wash {
  --wash-r: 250;
  --wash-g: 250;
  --wash-b: 250;
  --wash-side-a: 0.9;
  --wash-side-b: 0.62;
  --wash-side-stop: 61%;
  --wash-bottom-a: 0.78;
  --wash-bottom-stop: 43%;
  --wash-blur: 0px;
  z-index: 1;
  pointer-events: none;
  -webkit-backdrop-filter: blur(var(--wash-blur));
  backdrop-filter: blur(var(--wash-blur));
  background:
    linear-gradient(
      90deg,
      rgb(var(--wash-r) var(--wash-g) var(--wash-b) / var(--wash-side-a)) 0%,
      rgb(var(--wash-r) var(--wash-g) var(--wash-b) / var(--wash-side-b)) 33%,
      transparent var(--wash-side-stop)
    ),
    linear-gradient(
      0deg,
      rgb(var(--wash-r) var(--wash-g) var(--wash-b) / var(--wash-bottom-a)) 0%,
      transparent var(--wash-bottom-stop)
    );
}

.intro {
  position: absolute;
  z-index: 2;
  left: clamp(28px, 4.3vw, 54px);
  bottom: clamp(28px, 5.1vw, 54px);
  width: min(570px, calc(100% - 56px));
  pointer-events: none;
}

.eyebrow,
.hint {
  margin: 0;
  font: 600 10px/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  margin-bottom: 12px;
  color: rgb(49 48 43 / 70%);
}

.eyebrow-study {
  font: 400 10px/1.4 var(--font-serif);
  letter-spacing: -0.02em;
  text-transform: none;
}

.intro h1 {
  max-width: 566px;
  margin: 0;
  color: #55534d;
  font: 400 clamp(16px, 1.39vw, 20px) / 1.55 var(--font-serif);
  letter-spacing: -0.018em;
}

.hint {
  margin-top: 14px;
  color: rgb(49 48 43 / 52%);
  font-size: 9px;
}

.shader-card svg,
.controls svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.2;
}

.controls {
  position: absolute;
  z-index: 3;
  top: 20px;
  right: 20px;
  width: min(268px, calc(100% - 40px));
  padding: 14px;
  overflow: hidden;
  border-radius: 20px;
  transition:
    width 380ms cubic-bezier(0.2, 0.8, 0.2, 1),
    padding 380ms cubic-bezier(0.2, 0.8, 0.2, 1),
    border-radius 380ms cubic-bezier(0.2, 0.8, 0.2, 1),
    background 250ms ease,
    box-shadow 250ms ease;
}

.controls.is-open {
  width: min(268px, calc(100% - 40px));
  height: auto;
  color: #292824;
  border: 1px solid rgb(255 255 255 / 25%);
  background: rgb(255 255 255 / 10%);
  box-shadow: 0 8px 32px rgb(0 0 0 / 12%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  backdrop-filter: blur(40px) saturate(180%);
}

.controls::before {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / 20%),
    inset 0 0 16px rgb(255 255 255 / 5%);
  content: "";
  pointer-events: none;
}

.controls > * {
  position: relative;
  z-index: 1;
}

.controls--dock {
  top: auto;
  bottom: clamp(16px, 2.2vw, 28px);
  right: clamp(16px, 2.2vw, 28px);
  left: auto;
  width: min(312px, calc(100% - 32px));
}

.controls--panel {
  position: static;
}

.controls--always-open {
  width: min(312px, calc(100% - 32px));
  height: auto;
  padding: 14px;
  color: #292824;
  border: 1px solid rgb(255 255 255 / 25%);
  border-radius: 20px;
  background: rgb(255 255 255 / 10%);
  box-shadow: 0 8px 32px rgb(0 0 0 / 12%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  backdrop-filter: blur(40px) saturate(180%);
}

.controls--always-open .controls-body {
  max-height: min(52vh, 440px);
  opacity: 1;
  transform: none;
}

.controls-dock-title {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgb(49 48 43 / 72%);
}

.control-legend,
.control-group-label {
  display: block;
  width: 100%;
  margin: 0 0 8px;
  padding: 0;
  float: none;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgb(49 48 43 / 68%);
}

.control-group-label {
  margin-top: 4px;
}

.control-help {
  display: block;
  margin-top: 3px;
  font-size: 9px;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0;
  text-transform: none;
  color: rgb(49 48 43 / 48%);
}

.shader-color-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.shader-color-picker--row {
  align-items: flex-start;
  margin-bottom: 12px;
}

.shader-color-picker--row > span:first-child {
  max-width: calc(100% - 56px);
  line-height: 1.35;
}

.shader-color-picker--compact {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  margin: 0;
  font-size: 9px;
}

.palette-name {
  display: block;
  margin-top: 4px;
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 500;
  line-height: 1.2;
  color: rgb(49 48 43 / 55%);
}

.controls.is-open .control-legend,
.controls.is-open .control-group-label,
.controls--always-open .control-legend,
.controls--always-open .control-group-label {
  color: rgb(49 48 43 / 68%);
  text-shadow: 0 1px 10px rgb(255 255 255 / 75%);
}

.controls:not(.is-open):not(.controls--always-open) {
  width: 48px;
  height: 48px;
  padding: 0;
  color: #65615a;
  border: 1px solid rgb(255 255 255 / 25%);
  border-radius: 16px;
  background: rgb(255 255 255 / 10%);
  box-shadow: 0 8px 32px rgb(0 0 0 / 12%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  backdrop-filter: blur(40px) saturate(180%);
}

.controls-body {
  max-height: min(430px, calc(100vh - 220px));
  overflow-x: hidden;
  overflow-y: auto;
  opacity: 1;
  transform: translateY(0);
  transition:
    max-height 420ms cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 220ms ease 80ms,
    transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.controls:not(.is-open):not(.controls--always-open) .controls-body {
  max-height: 0;
  opacity: 0;
  transform: translateY(-8px);
  transition:
    max-height 360ms cubic-bezier(0.4, 0, 0.2, 1),
    opacity 120ms ease,
    transform 240ms ease;
}

.control-head,
.panel-actions,
.range-control > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.controls.is-open .control-head {
  min-height: 40px;
  margin-bottom: 2px;
}

.panel-heading {
  min-width: 0;
}

.panel-label,
.panel-title {
  margin: 0;
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.controls.is-open .panel-label {
  color: rgb(49 48 43 / 58%);
  text-shadow: 0 1px 10px rgb(255 255 255 / 75%);
}

.controls:not(.is-open) .label-open,
.controls:not(.is-open) .panel-title,
.controls:not(.is-open) .panel-heading {
  display: none;
}

.panel-title {
  margin-top: 4px;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.controls.is-open .panel-title {
  color: #31302b;
  text-shadow: 0 1px 10px rgb(255 255 255 / 75%);
}

.icon-button {
  display: grid;
  width: 40px;
  height: 40px;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.controls:not(.is-open) .icon-button:hover,
.controls:not(.is-open) .icon-button:focus-visible {
  background: rgb(255 255 255 / 22%);
}

.controls.is-open .icon-button:hover,
.controls.is-open .icon-button:focus-visible {
  background: rgb(49 48 43 / 7%);
}

.controls-disclosure {
  color: #65615a;
}

.disclosure-icon {
  display: block;
  width: 28px;
  height: 28px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.disclosure-icon--close {
  display: none;
}

.controls.is-open .disclosure-icon--open {
  display: none;
}

.controls.is-open .disclosure-icon--close {
  display: block;
}

.controls:not(.is-open) .control-head,
.controls:not(.is-open) .controls-disclosure {
  width: 48px;
  height: 48px;
  min-height: 48px;
}

.controls:not(.is-open) .controls-disclosure {
  border-radius: 16px;
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.study-picker {
  --study-active: 0;

  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 12px 0 14px;
  padding: 3px;
  border: 0;
  border-radius: 999px;
  isolation: isolate;
}

.controls.is-open .study-picker {
  background: rgb(255 255 255 / 18%);
  box-shadow: inset 0 1px 2px rgb(0 0 0 / 5%);
}

.study-picker-indicator {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 0;
  z-index: 0;
  width: 0;
  border-radius: 999px;
  background: #fff;
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / 80%),
    0 2px 8px rgb(38 42 39 / 10%);
  transform: translate3d(0, 0, 0);
  transition:
    transform 0.44s cubic-bezier(0.34, 1.15, 0.64, 1),
    width 0.44s cubic-bezier(0.34, 1.15, 0.64, 1);
  pointer-events: none;
  will-change: transform, width;
}

.study-picker button:nth-child(3) {
  grid-column: 1;
}

.study-picker button:nth-child(4) {
  grid-column: 2;
}

.study-picker button:nth-child(5) {
  grid-column: 3;
}

.study-picker button:nth-child(6) {
  grid-column: 4;
}

.study-picker button {
  position: relative;
  z-index: 1;
  min-width: 0;
  padding: 8px 4px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    color 0.28s ease,
    transform 0.22s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.study-picker button:active:not([aria-pressed="true"]) {
  transform: scale(0.96);
}

.controls.is-open .study-picker button {
  color: rgb(49 48 43 / 52%);
}

.controls.is-open .study-picker button[aria-pressed="true"] {
  color: #31302b;
  font-weight: 600;
}

.range-control {
  display: block;
  margin-top: 10px;
}

.range-control:first-of-type {
  margin-top: 0;
}

.range-control > span,
.palette-picker legend {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
}

.range-control > span > span:first-child {
  font-weight: 500;
}

.range-control output {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

.controls.is-open .range-control > span,
.controls.is-open .palette-picker legend {
  color: rgb(49 48 43 / 68%);
  text-shadow: 0 1px 10px rgb(255 255 255 / 75%);
}

.controls.is-open .range-control output {
  color: rgb(49 48 43 / 45%);
}

.controls.is-open input[type="range"] {
  --range-fill: 50%;
  --range-track: rgb(255 255 255 / 28%);
  appearance: none;
  width: 100%;
  height: 20px;
  margin: 2px 0 0;
  background: transparent;
  cursor: pointer;
}

.controls.is-open input[type="range"]::-webkit-slider-runnable-track {
  height: 5px;
  border-radius: 999px;
  background: linear-gradient(
    to right,
    #fff 0%,
    #fff var(--range-fill),
    var(--range-track) var(--range-fill),
    var(--range-track) 100%
  );
  box-shadow: inset 0 1px 2px rgb(0 0 0 / 6%);
}

.controls.is-open input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 28px;
  height: 18px;
  margin-top: -6.5px;
  border: 1px solid rgb(255 255 255 / 85%);
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 1px 3px rgb(0 0 0 / 10%);
}

.controls.is-open input[type="range"]::-moz-range-progress {
  height: 5px;
  border-radius: 999px 0 0 999px;
  background: #fff;
}

.controls.is-open input[type="range"]::-moz-range-track {
  height: 5px;
  border-radius: 999px;
  background: var(--range-track);
}

.controls.is-open input[type="range"]::-moz-range-thumb {
  width: 28px;
  height: 18px;
  border: 1px solid rgb(255 255 255 / 85%);
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 1px 3px rgb(0 0 0 / 10%);
}

.shader-color-picker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
}

.shader-color-picker--panel {
  margin-top: 0;
}

.controls.is-open .shader-color-picker {
  color: rgb(49 48 43 / 68%);
  text-shadow: 0 1px 10px rgb(255 255 255 / 75%);
}

.shader-color-picker input[type="color"] {
  width: 44px;
  height: 32px;
  padding: 2px;
  border: 1px solid rgb(255 255 255 / 70%);
  border-radius: 10px;
  background: rgb(255 255 255 / 35%);
  box-shadow: inset 0 1px 2px rgb(0 0 0 / 6%);
  cursor: pointer;
}

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

.shader-color-picker input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 6px;
}

.shader-color-picker input[type="color"]::-moz-color-swatch {
  border: 0;
  border-radius: 6px;
}

.about-hero .shader-color-picker input[type="color"] {
  border-color: rgb(49 48 43 / 14%);
  background: #fff;
}

.palette-picker {
  display: block;
  margin-top: 14px;
}

.palette-picker legend {
  display: block;
  float: none;
  width: 100%;
  margin-bottom: 8px;
  line-height: 1.2;
}

.palette-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.palette-picker button {
  display: block;
  width: 100%;
  padding: 6px 4px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  transition: transform 0.22s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.palette-picker button:active {
  transform: scale(0.97);
}

.palette-chip {
  display: block;
  width: 100%;
  height: 5px;
  border-radius: 999px;
  background: var(--palette-gradient);
  opacity: 0.42;
  box-shadow: inset 0 1px 1px rgb(0 0 0 / 6%);
  transition:
    height 0.28s cubic-bezier(0.34, 1.15, 0.64, 1),
    opacity 0.28s ease,
    box-shadow 0.28s ease;
}

.controls.is-open .palette-picker button[aria-pressed="true"] .palette-chip {
  height: 7px;
  opacity: 1;
  box-shadow:
    0 0 0 1px rgb(255 255 255 / 85%),
    0 1px 4px rgb(38 42 39 / 12%);
}

.controls.is-open .palette-picker button:focus-visible .palette-chip {
  box-shadow:
    0 0 0 2px rgb(49 48 43 / 28%),
    0 1px 4px rgb(38 42 39 / 10%);
}

.panel-actions {
  margin-top: 14px;
  padding-top: 0;
}

.controls.is-open .panel-actions {
  border-top: 0;
}

.text-button {
  min-height: 32px;
  padding: 0 12px;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
}

.controls.is-open .text-button {
  width: 100%;
  border: 0;
  border-radius: 999px;
  background: rgb(255 255 255 / 22%);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 35%);
  color: #31302b;
}

.controls.is-open button:hover {
  border-color: rgb(49 48 43 / 30%);
}

.controls.is-open button:focus-visible,
.controls.is-open input:focus-visible {
  outline: 2px solid #2f5e58;
  outline-offset: 2px;
}

.controls:not(.is-open) button:focus-visible {
  outline: 2px solid rgb(255 255 255 / 85%);
  outline-offset: 2px;
}

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

@media (max-width: 720px) {
  .page {
    padding: 16px;
  }

  .shader-card {
    min-height: 620px;
    height: calc(100vh - 32px);
    max-height: 760px;
  }

  .intro {
    bottom: 28px;
  }

  .controls.is-open {
    max-height: calc(100% - 36px);
    overflow-y: auto;
  }
}

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

  .study-picker-indicator,
  .study-picker button,
  .palette-picker button,
  .palette-chip {
    transition: none;
  }
}