/* Color Converter — light/mist theme, coral accent #f97316, hairline borders, drift motion */
/* visual_identity: theme_posture=light, surface=mist, border=hairline, motion=drift */

.color-studio-page {
  --cs-frame-width:   1000px;
  --cs-accent:        #f97316;
  --cs-accent-soft:   rgba(249, 115, 22, 0.10);
  --cs-accent-mid:    rgba(249, 115, 22, 0.22);
  --cs-accent-border: rgba(249, 115, 22, 0.30);
  --cs-page-bg:       #fdf8f4;
  --cs-surface:       rgba(255, 255, 255, 0.82);
  --cs-surface-hover: rgba(255, 255, 255, 0.96);
  --cs-ink:           #2c1f14;
  --cs-ink-soft:      #7a6350;
  --cs-ink-muted:     #b09880;
  --cs-border:        rgba(180, 130, 80, 0.16);
  --cs-border-focus:  rgba(249, 115, 22, 0.48);
  --cs-shadow:        0 20px 48px rgba(100, 60, 20, 0.10);
  --cs-pass:          #15803d;
  --cs-fail:          #dc2626;
  --cs-t:             170ms ease;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(249,115,22,0.07), transparent 38%),
    radial-gradient(ellipse at 80% 100%, rgba(251,146,60,0.05), transparent 36%),
    linear-gradient(180deg, #fdf8f4 0%, #f8f2ec 55%, #f2e9de 100%);
  color: var(--cs-ink);
  min-height: 100vh;
  font-family: "Trebuchet MS", "Avenir Next", "Segoe UI", sans-serif;
}

/* ─── Header / footer light adaptation ─── */
.color-studio-page .site-header {
  background: rgba(253, 248, 244, 0.92);
  border-bottom-color: var(--cs-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.color-studio-page .site-brand { color: var(--cs-ink); }
.color-studio-page .site-footer {
  background: rgba(242, 233, 222, 0.80);
  border-top-color: var(--cs-border);
}
.color-studio-page .footer-title,
.color-studio-page .footer-copy { color: var(--cs-ink-soft); }
.color-studio-page .site-nav a { color: var(--cs-ink-soft); }
.color-studio-page .site-nav a:hover { color: var(--cs-ink); }

/* ─── Page frame ─── */
.color-studio-page .tool-frame {
  width: 100%;
  max-width: var(--cs-frame-width);
  margin-inline: auto;
}
.color-studio-page .tool-header-block {
  max-width: 40rem;
  margin-bottom: 0.6rem;
  padding-inline: 0.5rem;
}
.color-studio-page .page-title {
  color: #221509;
  font-size: 2.05rem;
  line-height: 1;
  letter-spacing: -0.04em;
}
.color-studio-page .page-subtitle {
  color: var(--cs-ink-soft);
  font-size: 0.88rem;
  line-height: 1.32;
  margin-top: 6px;
}

/* ─── Tool shell wrapper ─── */
.color-studio-page .tool-shell {
  padding: 0.8rem;
  border-radius: 1.45rem;
  border: 1px solid rgba(180, 130, 80, 0.16);
  background:
    radial-gradient(circle at top right, rgba(249,115,22,0.07), transparent 28%),
    linear-gradient(180deg, rgba(255,255,255,0.98), rgba(252,246,240,0.98));
  box-shadow: 0 24px 48px rgba(100, 60, 20, 0.10);
}

/* ─── Tool notes / discovery light override ─── */
.color-studio-page .tool-notes.card,
.color-studio-page .card {
  background: rgba(255,255,255,0.72);
  border-color: var(--cs-border);
  color: var(--cs-ink);
}
.color-studio-page .card-title { color: var(--cs-ink); }
.color-studio-page .card-text { color: var(--cs-ink-soft); }
.color-studio-page .card-eyebrow { color: var(--cs-accent); }
.color-studio-page .tool-discovery__title { color: var(--cs-ink); }
.color-studio-page .tool-discovery__list li,
.color-studio-page .tool-discovery__faq dt,
.color-studio-page .tool-discovery__faq dd { color: var(--cs-ink-soft); }
.color-studio-page .card-link { color: var(--cs-accent); }

/* ─── Two-panel layout ─── */
.cs-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 0.74rem;
  align-items: start;
}

.cs-controls-panel,
.cs-visual-panel {
  display: grid;
  gap: 0.52rem;
  min-width: 0;
  padding: 0.6rem;
  border-radius: 1.1rem;
  border: 1px solid var(--cs-border);
  box-shadow: var(--cs-shadow);
}
.cs-controls-panel {
  background:
    radial-gradient(circle at top left, rgba(255, 220, 190, 0.26), transparent 32%),
    linear-gradient(180deg, rgba(255,252,248,0.99), rgba(252,246,240,0.99));
}
.cs-visual-panel {
  background:
    radial-gradient(circle at top right, rgba(249,115,22,0.08), transparent 30%),
    linear-gradient(180deg, rgba(255,253,251,0.99), rgba(253,247,241,0.99));
}

/* ─── Panel headings ─── */
.cs-panel-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.5rem;
}
.cs-panel-heading--visual {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}
.cs-panel-eyebrow {
  margin: 0 0 0.14rem;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cs-accent);
}
.cs-panel-title {
  margin: 0;
  font-size: 1rem;
  line-height: 1.12;
  color: var(--cs-ink);
  font-weight: 700;
}
.cs-panel-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  flex-wrap: nowrap;
  align-self: start;
}
.cs-panel-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.5rem;
  padding: 0.08rem 0.52rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  background: rgba(255,255,255,0.65);
  border: 1px solid var(--cs-border);
  color: var(--cs-ink-soft);
}
.cs-panel-pill--soft {
  background: var(--cs-accent-soft);
  border-color: var(--cs-accent-border);
  color: var(--cs-accent);
}
.cs-card-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cs-ink-muted);
  margin: 0;
}

/* ─── Language toggle ─── */
.cs-lang-toggle {
  display: inline-flex;
  gap: 0.22rem;
  padding: 0.22rem;
  border-radius: 999px;
  background: rgba(245, 238, 230, 0.90);
  border: 1px solid var(--cs-border);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.70);
}
.cs-lang-btn {
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--cs-ink-soft);
  padding: 0.36rem 0.72rem;
  font: inherit;
  font-weight: 700;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background var(--cs-t), color var(--cs-t), transform var(--cs-t);
}
.cs-lang-btn:hover,
.cs-lang-btn:focus-visible {
  color: var(--cs-ink);
  background: rgba(249,115,22,0.12);
  outline: none;
  transform: translateY(-1px);
}
.cs-lang-btn--active {
  background: linear-gradient(135deg, rgba(249,115,22,0.92), rgba(251,146,60,0.88));
  color: #fff;
  box-shadow: 0 6px 16px rgba(249,115,22,0.24);
}

/* ─── Clear button ─── */
.cs-clear-btn {
  min-height: 2.1rem;
  padding: 0 0.82rem;
  border-radius: 999px;
  border: 1px solid var(--cs-border);
  background: rgba(255,255,255,0.72);
  color: var(--cs-ink-soft);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--cs-t), color var(--cs-t), border-color var(--cs-t), transform var(--cs-t);
}
.cs-clear-btn:hover,
.cs-clear-btn:focus-visible {
  background: rgba(249,115,22,0.08);
  color: var(--cs-accent);
  border-color: var(--cs-accent-border);
  outline: none;
  transform: translateY(-1px);
}

/* ─── Fields card ─── */
.cs-fields-card {
  display: grid;
  gap: 0.6rem;
  padding: 0.72rem;
  border-radius: 0.9rem;
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.cs-field {
  display: grid;
  gap: 0.28rem;
}
.cs-field-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.cs-field-label {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cs-ink-soft);
}
.cs-field-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.cs-input {
  flex: 1;
  min-width: 0;
  padding: 9px 12px;
  border-radius: 9px;
  border: 1px solid var(--cs-border);
  background: rgba(255,255,255,0.88);
  color: var(--cs-ink);
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--cs-t), box-shadow var(--cs-t);
}
.cs-input--mono {
  font-family: 'Courier New', Courier, monospace;
}
.cs-input:focus {
  border-color: var(--cs-border-focus);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.10);
}
.cs-input.is-error {
  border-color: rgba(220,38,38,0.48);
  background: rgba(220,38,38,0.03);
}
.cs-picker {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--cs-border);
  background: transparent;
  cursor: pointer;
  padding: 2px;
  flex-shrink: 0;
  transition: border-color var(--cs-t);
}
.cs-picker:hover { border-color: var(--cs-accent-border); }
.cs-copy-btn {
  padding: 4px 8px;
  border-radius: 7px;
  border: 1px solid var(--cs-border);
  background: transparent;
  color: var(--cs-ink-muted);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--cs-t), color var(--cs-t), border-color var(--cs-t);
  flex-shrink: 0;
}
.cs-copy-btn:hover {
  background: var(--cs-accent-soft);
  color: var(--cs-accent);
  border-color: var(--cs-accent-border);
}
.cs-copy-btn.copied {
  color: var(--cs-pass);
  border-color: rgba(21,128,61,0.32);
  background: rgba(21,128,61,0.07);
}
.cs-field-error {
  font-size: 0.72rem;
  color: var(--cs-fail);
  margin: 0;
}

/* ─── Preset chips ─── */
.cs-preset-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cs-preset-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
}
.cs-preset-chip {
  padding: 0.28rem 0.72rem;
  border-radius: 999px;
  border: 2px solid transparent;
  background: var(--chip-bg, var(--cs-border));
  color: #fff;
  font: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  text-shadow: 0 1px 2px rgba(0,0,0,0.22);
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
  transition: transform var(--cs-t), box-shadow var(--cs-t), border-color var(--cs-t);
}
.cs-preset-chip:hover,
.cs-preset-chip:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0,0,0,0.18);
  outline: none;
  border-color: rgba(255,255,255,0.5);
}

/* ─── Swatch card ─── */
.cs-swatch-card {
  display: grid;
  gap: 0.52rem;
  padding: 0.72rem;
  border-radius: 0.9rem;
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.cs-swatch-stage-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.cs-complement-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 6px;
  border-radius: 999px;
  border: 1px solid var(--cs-border);
  background: rgba(255,255,255,0.70);
  color: var(--cs-ink-soft);
  font: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--cs-t), border-color var(--cs-t), transform var(--cs-t);
}
.cs-complement-btn:hover {
  background: rgba(255,255,255,0.90);
  border-color: var(--cs-accent-border);
  transform: translateY(-1px);
}
.cs-complement-swatch {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 1px solid rgba(255,255,255,0.5);
  flex-shrink: 0;
}
.cs-swatch-wrap {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--cs-border);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.3);
}
.cs-swatch {
  width: 100%;
  height: 130px;
  background: linear-gradient(135deg, #f97316 0%, #fb923c 60%, #fdba74 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 100ms ease;
  position: relative;
}
.cs-swatch-hint {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  font-weight: 500;
  pointer-events: none;
  margin: 0;
  transition: opacity 180ms ease;
}
.cs-swatch-hint.hidden { opacity: 0; }
.cs-swatch-output {
  display: block;
  font-size: 0.78rem;
  font-family: 'Courier New', Courier, monospace;
  color: var(--cs-ink-soft);
  text-align: center;
  min-height: 1.2em;
}

/* ─── Contrast card ─── */
.cs-contrast-card {
  display: grid;
  gap: 0.52rem;
  padding: 0.72rem;
  border-radius: 0.9rem;
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.cs-contrast-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.cs-contrast-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}
.cs-contrast-tile {
  display: grid;
  gap: 0.3rem;
}
.cs-contrast-preview {
  height: 52px;
  border-radius: 9px;
  border: 1px solid var(--cs-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--cs-t);
}
.cs-contrast-aa {
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1;
}
.cs-contrast-meta {
  display: flex;
  align-items: center;
  gap: 6px;
}
.cs-contrast-ratio {
  font-size: 0.85rem;
  font-weight: 800;
  font-family: 'Courier New', Courier, monospace;
  color: var(--cs-ink);
}
.cs-contrast-badge {
  font-size: 0.62rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}
.cs-contrast-badge.pass-aaa {
  background: rgba(21,128,61,0.10);
  color: var(--cs-pass);
  border: 1px solid rgba(21,128,61,0.22);
}
.cs-contrast-badge.pass-aa {
  background: rgba(21,128,61,0.07);
  color: var(--cs-pass);
  border: 1px solid rgba(21,128,61,0.16);
}
.cs-contrast-badge.fail {
  background: rgba(220,38,38,0.07);
  color: var(--cs-fail);
  border: 1px solid rgba(220,38,38,0.16);
}
.cs-contrast-desc {
  font-size: 0.68rem;
  color: var(--cs-ink-muted);
  margin: 0;
}

/* ─── Named color card ─── */
.cs-named-card {
  display: grid;
  gap: 0.44rem;
  padding: 0.72rem;
  border-radius: 0.9rem;
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.cs-named-header { display: flex; align-items: center; }
.cs-named-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.cs-named-swatch {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid var(--cs-border);
  flex-shrink: 0;
  transition: background var(--cs-t);
}
.cs-named-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--cs-ink);
}
.cs-named-hex {
  font-size: 0.78rem;
  font-family: 'Courier New', Courier, monospace;
  color: var(--cs-ink-soft);
}
.cs-named-exact {
  font-size: 0.64rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--cs-accent-soft);
  color: var(--cs-accent);
  border: 1px solid var(--cs-accent-border);
  letter-spacing: 0.04em;
}

/* ─── HSL slider card ─── */
.cs-hsl-card {
  display: grid;
  gap: 0.52rem;
  padding: 0.72rem;
  border-radius: 0.9rem;
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.cs-hsl-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.cs-hsl-hint {
  font-size: 0.66rem;
  color: var(--cs-ink-muted);
  font-style: italic;
}
.cs-hsl-rows {
  display: grid;
  gap: 0.44rem;
}
.cs-hsl-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cs-hsl-axis {
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--cs-ink-soft);
  width: 1rem;
  text-align: center;
  flex-shrink: 0;
}
.cs-hsl-track-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  height: 24px;
}
.cs-hsl-input {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  border: 1px solid rgba(0,0,0,0.08);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.08);
  transition: opacity var(--cs-t);
}
.cs-hsl-input--hue {
  background: linear-gradient(to right,
    hsl(0,100%,50%), hsl(30,100%,50%), hsl(60,100%,50%),
    hsl(90,100%,50%), hsl(120,100%,50%), hsl(150,100%,50%),
    hsl(180,100%,50%), hsl(210,100%,50%), hsl(240,100%,50%),
    hsl(270,100%,50%), hsl(300,100%,50%), hsl(330,100%,50%), hsl(360,100%,50%));
}
/* S and L backgrounds are set dynamically via JS */
.cs-hsl-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(0,0,0,0.18);
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
  cursor: pointer;
  transition: transform 100ms ease, box-shadow 100ms ease;
}
.cs-hsl-input::-webkit-slider-thumb:hover {
  transform: scale(1.22);
  box-shadow: 0 4px 12px rgba(249,115,22,0.36);
}
.cs-hsl-input::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(0,0,0,0.18);
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
  cursor: pointer;
}
.cs-hsl-val {
  font-size: 0.70rem;
  font-family: 'Courier New', Courier, monospace;
  color: var(--cs-ink-soft);
  min-width: 2.6rem;
  text-align: right;
  flex-shrink: 0;
}

/* ─── Tool-discovery spacing ─── */
.color-studio-page .tool-discovery {
  padding-inline: 0.5rem;
}

/* ─── Responsive ─── */
@media (max-width: 680px) {
  .cs-layout {
    grid-template-columns: 1fr;
  }
  .cs-swatch { height: 110px; }
  .color-studio-page .tool-shell { padding: 0.54rem; }
}