:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --soft-surface: #f3f4f5;
  --text: #31363a;
  --muted: #767d84;
  --track: #d8dde2;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Barlow", "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
  font-variant-numeric: tabular-nums;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.page-shell {
  width: min(1680px, calc(100% - 18px));
  margin: 0 auto;
  padding: 8px 0 18px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  gap: 6px;
  padding: 6px 0 10px;
  background: #fff;
}

.app-nav {
  display: flex;
  gap: 12px;
}

.app-nav a {
  color: var(--muted);
  font-size: 0.64rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.app-nav a[aria-current="page"] {
  color: var(--text);
}

.topbar h1,
.section-head h2,
.sample-title,
.sample-meta {
  margin: 0;
  font-family: "Barlow", "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.topbar h1 {
  font-size: clamp(1rem, 1.4vw, 1.35rem);
  line-height: 1;
}

.section-kicker,
.field-label {
  margin: 0;
  font-size: 0.54rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.preset-row {
  display: grid;
  grid-template-columns: minmax(420px, 620px) minmax(320px, 392px);
  gap: 18px;
  justify-content: start;
  align-items: start;
}

.preset-strip {
  display: grid;
  grid-template-columns: repeat(12, minmax(28px, 1fr));
  gap: 4px;
  width: min(100%, 620px);
}

.custom-dock {
  display: grid;
  grid-template-columns: repeat(3, minmax(72px, 1fr)) 74px;
  gap: 4px 8px;
  align-items: start;
  min-height: 0;
}

.custom-dock-meta {
  display: grid;
  align-content: start;
  gap: 2px;
  min-height: 0;
}

.custom-dock-score-label {
  font-size: 0.56rem;
  line-height: 1.1;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.custom-dock-score-value {
  font-size: 1.34rem;
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
}

.custom-dock-controls {
  display: contents;
}

.preset-button {
  min-height: 28px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--swatch-color);
}

.preset-button.is-active {
  outline: 2px solid #31363a;
  outline-offset: 2px;
}

.control-bar {
  display: grid;
  grid-template-columns: repeat(3, minmax(170px, 1fr)) 110px;
  gap: 10px;
  align-items: end;
}

.control {
  display: grid;
  gap: 4px;
}

.slider-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.slider-head output {
  font-size: 0.62rem;
  color: var(--muted);
}

.field-label {
  display: block;
  margin-bottom: 0;
}

.control-hex input {
  min-height: 30px;
  width: 100%;
  padding: 4px 8px;
  border: 0;
  border-radius: 0;
  background: #fff;
  color: var(--text);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.range-input {
  width: 100%;
  margin: 0;
  appearance: none;
  background: transparent;
}

.range-input::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--track);
}

.range-input::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -6px;
  appearance: none;
  border-radius: 0;
  background: #31363a;
}

.range-input::-moz-range-track {
  height: 2px;
  background: var(--track);
}

.range-input::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 0;
  border-radius: 0;
  background: #31363a;
}

.range-input:focus-visible,
.preset-button:focus-visible,
.tone-swatch:focus-visible,
.sample-swatch:focus-visible,
.dictionary-swatch:focus-visible,
.tone-chip button:focus-visible,
.custom-picker-input:focus-visible,
.control-hex input:focus-visible,
.color-picker:focus-visible,
.app-nav a:focus-visible {
  outline: 2px solid #9aa1a8;
  outline-offset: 2px;
}

.copy-status {
  min-height: 14px;
  margin: 0;
  font-size: 0.56rem;
  line-height: 1.2;
  color: var(--muted);
}

.topbar-status {
  padding-left: 88px;
}

.sample-section {
  padding-top: 4px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.section-copy {
  display: grid;
  gap: 2px;
}

.section-head h2 {
  font-size: 0.9rem;
  line-height: 1;
}

.section-subnote {
  margin: 0;
  font-size: 0.56rem;
  line-height: 1.3;
  color: var(--muted);
}

.sample-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(176px, 1fr));
  gap: 12px 14px;
}

.tone-scale-shell {
  overflow-x: auto;
  margin-bottom: 18px;
}

.tone-scale-row {
  display: grid;
  grid-template-columns: repeat(21, minmax(42px, 1fr));
  min-width: 960px;
  gap: 0;
}

.tone-swatch {
  min-height: 82px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--swatch-color);
}

.sample-card {
  display: grid;
  gap: 5px;
  min-height: 92px;
  padding: 4px;
  background: #fff;
}

.sample-card-textless {
  gap: 3px;
  min-height: 92px;
  padding: 0;
}

.sample-card-textless .sample-body {
  display: grid;
  gap: 2px;
}

.sample-card-textless .sample-score {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 8px;
  padding: 1px 2px 0;
}

.sample-card-textless .sample-score-label {
  display: block;
  margin: 0;
  font-size: 0.56rem;
  line-height: 1.1;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sample-card-textless .sample-score-value {
  display: block;
  margin: 0;
  font-size: 1.34rem;
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
}

.sample-card-textless .sample-meta,
.sample-card-textless .sample-title,
.sample-card-textless .sample-source {
  display: none;
}

.sample-card-custom {
  min-height: 134px;
}

.custom-picker-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  padding: 0 2px 4px;
}

.custom-picker {
  display: grid;
  gap: 2px;
  min-width: 0;
  align-content: start;
}

.custom-picker-label,
.custom-picker-code {
  margin: 0;
  font-size: 0.52rem;
  line-height: 1.1;
  color: var(--muted);
}

.custom-picker-label {
  order: 2;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.custom-picker-input {
  order: 1;
  width: 100%;
  min-height: 28px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.custom-picker-code {
  order: 3;
}

.custom-picker-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.custom-picker-input::-webkit-color-swatch {
  border: 0;
  border-radius: 0;
}

.custom-picker-input::-moz-color-swatch {
  border: 0;
  border-radius: 0;
}

.sample-card-textless .sample-note {
  display: block;
  margin: 0;
  padding: 0 2px 3px;
  font-size: 0.58rem;
  line-height: 1.25;
  color: var(--text);
  letter-spacing: 0.01em;
}

.sample-swatch-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
}

.sample-swatch {
  display: block;
  min-height: 56px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--swatch-color);
}

.sample-body {
  display: grid;
  gap: 1px;
}

.sample-score {
  display: none;
}

.sample-title {
  font-size: 0.72rem;
  line-height: 1;
}

.sample-meta {
  font-size: 0.56rem;
  line-height: 1;
  color: var(--muted);
}

.sample-note,
.sample-source {
  display: none;
}

.dictionary-section {
  margin-top: 18px;
  padding: 14px;
  background: #f3f4f5;
}

.dictionary-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.1fr) minmax(280px, 0.9fr);
  gap: 16px;
}

.dictionary-side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.dictionary-block {
  display: grid;
  gap: 10px;
}

.dictionary-title-row {
  display: grid;
  gap: 2px;
}

.dictionary-title-row h2,
.dictionary-title-row p {
  margin: 0;
}

.dictionary-title-row h2 {
  font-size: 0.8rem;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.dictionary-title-row p {
  font-size: 0.62rem;
  line-height: 1.35;
  color: var(--muted);
}

.image-palette-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.image-palette-card {
  display: grid;
  gap: 6px;
}

.image-palette-text {
  display: grid;
  gap: 2px;
}

.image-palette-text h3,
.image-palette-text p {
  margin: 0;
}

.image-palette-text h3 {
  font-size: 0.72rem;
  line-height: 1.15;
}

.image-palette-text p {
  font-size: 0.6rem;
  line-height: 1.35;
  color: var(--muted);
}

.dictionary-swatch-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
}

.dictionary-swatch {
  min-height: 52px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--swatch-color);
}

.wheel-panel {
  display: grid;
  gap: 10px;
  justify-items: center;
}

.hue-wheel {
  --current-hue: 0deg;
  position: relative;
  width: min(100%, 248px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, transparent 0 35%, #f3f4f5 35.5% 44%, transparent 44.5%),
    conic-gradient(
      #ff0040 0deg,
      #ff7a00 60deg,
      #ffd400 120deg,
      #28c840 180deg,
      #0076ff 240deg,
      #7a2eff 300deg,
      #ff0040 360deg
    );
}

.hue-wheel-hole {
  position: absolute;
  inset: 30%;
  border-radius: 50%;
  background: #f3f4f5;
}

.hue-wheel-pointer {
  position: absolute;
  inset: 0;
  transform: rotate(var(--current-hue));
}

.hue-wheel-pointer::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 50%;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  border: 2px solid #111111;
  border-radius: 50%;
  background: #ffffff;
}

.hue-wheel-labels {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  width: 100%;
  gap: 4px;
}

.hue-wheel-labels span {
  font-size: 0.58rem;
  color: var(--muted);
  text-align: center;
}

.tone-chart-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.tone-chip {
  display: grid;
  gap: 4px;
}

.tone-chip button {
  min-height: 44px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: var(--swatch-color);
}

.tone-chip span {
  font-size: 0.56rem;
  line-height: 1.1;
  color: var(--muted);
}

.basics-section {
  margin-top: 24px;
  padding: 16px 14px 18px;
  background: var(--soft-surface);
}

.basics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px 16px;
}

.basic-card {
  display: grid;
  gap: 6px;
  align-content: start;
}

.basic-card h2,
.basic-card p {
  margin: 0;
}

.basic-card h2 {
  font-size: 0.78rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.basic-card p {
  font-size: 0.64rem;
  line-height: 1.5;
  color: var(--text);
}

@media (max-width: 920px) {
  .page-shell {
    width: calc(100% - 12px);
  }

  .control-bar {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .control-range {
    grid-column: span 2;
  }

  .control-hex {
    grid-column: span 2;
  }

  .topbar-status {
    padding-left: 0;
  }

  .preset-strip {
    grid-template-columns: repeat(6, minmax(28px, 1fr));
    max-width: none;
  }

  .preset-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .custom-dock {
    max-width: 420px;
    grid-template-columns: repeat(3, minmax(0, 1fr)) 74px;
  }

  .sample-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .dictionary-layout {
    grid-template-columns: 1fr;
  }

  .image-palette-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .basics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .tone-scale-row {
    min-width: 840px;
  }

  .tone-swatch {
    min-height: 64px;
  }

  .sample-card {
    min-height: 84px;
  }

  .sample-card-custom {
    min-height: 128px;
  }

  .sample-swatch {
    min-height: 46px;
  }
}

@media (max-width: 480px) {
  .sample-grid {
    grid-template-columns: 1fr;
  }

  .dictionary-section {
    padding: 12px;
  }

  .image-palette-grid,
  .tone-chart-grid,
  .basics-grid {
    grid-template-columns: 1fr;
  }

  .basics-section {
    padding: 14px 12px 16px;
  }
}