/* Interactive color wheel (/color-wheel/ and the home preview).
   Builds on the tokens in /landing-pages.css. */

.tool-hero {
  position: relative;
  padding: 48px clamp(20px, 6vw, 88px) 8px;
  background:
    radial-gradient(circle at 82% 10%, rgba(213, 154, 34, 0.14), transparent 34%),
    var(--paper);
}

.tool-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--spectrum);
}

.tool-hero h1 {
  font-size: clamp(2.6rem, 5.4vw, 4.6rem);
}

.tool-hero .hero-text {
  max-width: 820px;
  margin-top: 18px;
}

/* ---------- the tool ---------- */

.cw {
  display: grid;
  grid-template-columns: minmax(280px, 440px) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
  padding: 36px clamp(20px, 6vw, 88px) 56px;
}

.cw-wheel-col {
  display: grid;
  gap: 18px;
  justify-items: center;
}

.cw-wheel {
  position: relative;
  width: min(100%, 440px);
  aspect-ratio: 1;
  touch-action: none;
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}

.cw-disc,
.cw-shade {
  position: absolute;
  inset: 0;
  border-radius: 50%;
}

.cw-disc {
  background: conic-gradient(from 90deg, #f00, #ff0, #0f0, #0ff, #00f, #f0f, #f00);
  box-shadow: 0 16px 40px rgba(18, 20, 23, 0.16);
}

/* Saturation: white at the center fading to the pure hue at the rim (HSB). */
.cw-disc::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle closest-side, #fff, rgba(255, 255, 255, 0));
}

/* Brightness: black on top at opacity 1 - brightness. */
.cw-shade {
  background: #000;
  pointer-events: none;
}

.cw-markers {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cw-marker,
.cw-handle {
  position: absolute;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.cw-marker {
  width: 24px;
  height: 24px;
  border: 3px solid #fff;
  box-shadow: 0 0 0 1px rgba(18, 20, 23, 0.28), 0 6px 14px rgba(18, 20, 23, 0.22);
}

.cw-handle {
  width: 40px;
  height: 40px;
  padding: 0;
  border: 4px solid #fff;
  box-shadow: 0 0 0 1px rgba(18, 20, 23, 0.3), 0 8px 20px rgba(18, 20, 23, 0.3);
  cursor: grab;
  touch-action: none;
}

.cw-handle:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

.cw-panel {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.cw-group {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

.cw-label,
.cw-group legend {
  padding: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 820;
  text-transform: uppercase;
}

.cw-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cw-chips label {
  position: relative;
}

.cw-chips input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.cw-chips span {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  font-size: 14px;
  font-weight: 720;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.cw-chips input:checked + span {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.cw-chips input:focus-visible + span {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.cw-fields {
  display: grid;
  grid-template-columns: minmax(150px, 0.8fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: end;
}

.cw-field {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.cw-field input[type="text"] {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font: 700 16px ui-monospace, SFMono-Regular, Menlo, monospace;
  text-transform: uppercase;
}

.cw-field input[aria-invalid="true"] {
  border-color: var(--coral);
}

.cw-field input[type="range"] {
  width: 100%;
  min-height: 44px;
  accent-color: var(--ink);
}

.cw-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cw-swatch {
  display: grid;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

.cw-chip {
  display: flex;
  align-items: flex-end;
  height: 104px;
  padding: 12px;
  border: 0;
  font-size: 26px;
  font-weight: 760;
  cursor: copy;
}

.cw-codes {
  display: grid;
  gap: 2px;
  padding: 10px 12px 12px;
  color: var(--muted);
  font: 500 13px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.cw-hex {
  justify-self: start;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: 800 15px ui-monospace, SFMono-Regular, Menlo, monospace;
  cursor: copy;
}

.cw-tag {
  margin-right: 6px;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--surface-strong);
  color: var(--accent-strong);
  font: 800 11px ui-sans-serif, system-ui, sans-serif;
  text-transform: uppercase;
  vertical-align: 1px;
}

.cw-contrast {
  margin-top: 4px;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 12px;
}

.cw-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.cw-actions .button {
  cursor: pointer;
  font-family: inherit;
}

.cw-status {
  min-height: 1.4em;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 720;
}

/* App hand-off right under the palette. */
.cw-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px 24px;
  align-items: center;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.cw-cta h2 {
  font-size: 1.3rem;
  line-height: 1.2;
}

.cw-cta p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 15px;
}

.cw-cta .button {
  margin-top: 14px;
}

.cw-qr {
  display: grid;
  justify-items: center;
  gap: 6px;
  width: 132px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.3;
  text-align: center;
}

.cw-qr img {
  width: 116px;
  height: 116px;
  padding: 6px;
  border-radius: var(--radius);
  background: #fff;
}

/* iOS only, after a few interactions; never covers the tool. */
.cw-bar {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 60;
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 10px 10px 10px 16px;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  box-shadow: var(--shadow);
  font-size: 15px;
  font-weight: 720;
}

.cw-bar[hidden] {
  display: none;
}

.cw-bar span {
  flex: 1;
}

.cw-bar a {
  padding: 10px 14px;
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  white-space: nowrap;
}

.cw-bar button {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

/* ---------- article ---------- */

.tool-article {
  display: grid;
  gap: 56px;
  padding: clamp(56px, 8vw, 104px) clamp(20px, 6vw, 88px);
  background: var(--surface);
}

.tool-article section {
  max-width: 860px;
}

.tool-article h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
}

.tool-article p,
.tool-article li {
  color: var(--ink-soft);
}

.tool-article p {
  margin-top: 16px;
}

.tool-article a:not(.button) {
  color: var(--accent-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.tool-steps {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding-left: 1.4em;
}

.tool-harmonies {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  border: 1px solid var(--line);
  background: var(--line);
}

.tool-harmonies article {
  padding: 22px;
  background: var(--paper);
}

.tool-harmonies p {
  margin-top: 8px;
  font-size: 15px;
}

.tool-app {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 320px);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.tool-app ul {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding-left: 1.2em;
}

.tool-app li {
  color: var(--ink-soft);
}

.tool-app .landing-actions {
  margin-top: 26px;
}

.tool-app figure {
  margin: 0;
}

.tool-app img {
  width: 100%;
  border-radius: 28px;
  box-shadow: var(--soft-shadow);
}

/* ---------- home preview ---------- */

.home-wheel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 520px);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.cw-mini {
  display: grid;
  grid-template-columns: minmax(180px, 260px) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 0;
}

.cw-mini .cw-wheel {
  width: 100%;
}

.cw-mini .cw-handle {
  width: 34px;
  height: 34px;
}

.cw-mini .cw-swatches {
  grid-template-columns: 1fr;
}

.cw-mini .cw-chip {
  height: 64px;
  font-size: 20px;
}

.home-wheel .section-copy .button {
  margin-top: 26px;
}

@media (max-width: 1080px) {
  .cw,
  .home-wheel {
    grid-template-columns: 1fr;
  }

  .cw-wheel {
    width: min(100%, 380px);
  }
}

@media (max-width: 760px) {
  .tool-hero {
    padding: 34px 16px 0;
  }

  .tool-hero h1 {
    font-size: clamp(2.3rem, 11vw, 3.2rem);
  }

  .tool-hero .hero-text {
    margin-top: 12px;
    font-size: 1rem;
  }

  .cw {
    gap: 24px;
    padding: 24px 16px 40px;
  }

  .cw-wheel {
    width: min(100%, 320px);
  }

  .cw-fields {
    grid-template-columns: 1fr 1fr;
  }

  .cw-fields .cw-field:first-child {
    grid-column: 1 / -1;
  }

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

  .cw-cta {
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .cw-qr {
    display: none;
  }

  .tool-article {
    padding: 48px 16px;
  }

  .tool-harmonies,
  .tool-app {
    grid-template-columns: 1fr;
  }

  .tool-app figure {
    max-width: 260px;
  }

  .cw-mini {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: 16px;
  }
}