:root {
  --r-color: #e74c3c;
  --g-color: #27ae60;
  --b-color: #2980b9;
}

* { box-sizing: border-box; }

body {
  padding: 24px;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
}

/* ── Color preview ────────────────────────────── */
.color-preview-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.color-preview {
  width: 100%;
  height: 160px;
  border-radius: 14px;
  border: 1px solid #ddd;
  background: #ff0000;
  transition: background 0.05s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.hex-display {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  letter-spacing: 2px;
  color: #333;
  background: #f4f6fb;
  padding: 6px 20px;
  border-radius: 8px;
  border: 1px solid #e0e4ea;
}

/* ── Sliders ──────────────────────────────────── */
.sliders {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.channel-label {
  font-weight: 800;
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.r-label { color: var(--r-color); }
.g-label { color: var(--g-color); }
.b-label { color: var(--b-color); }

.slider-track-wrap {
  flex: 1 1 auto;
  min-width: 0;
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  transition: opacity 0.1s;
}

.slider:focus-visible {
  outline: 3px solid #66ccff;
  outline-offset: 2px;
}

.r-slider {
  background: linear-gradient(to right, #000 0%, #ff0000 100%);
}

.g-slider {
  background: linear-gradient(to right, #000 0%, #00ff00 100%);
}

.b-slider {
  background: linear-gradient(to right, #000 0%, #0000ff 100%);
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #bbb;
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
  cursor: pointer;
  transition: box-shadow 0.1s, border-color 0.1s;
}

.slider::-webkit-slider-thumb:hover {
  box-shadow: 0 2px 10px rgba(0,0,0,0.28);
  border-color: #888;
}

.slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #bbb;
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
  cursor: pointer;
}

.value-input {
  width: 60px;
  flex-shrink: 0;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  padding: 6px 4px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fafafa;
  color: #222;
  font-family: 'Courier New', monospace;
}

.value-input:focus {
  outline: 3px solid #66ccff;
  outline-offset: 1px;
  border-color: #aaa;
}

/* ── Bar visualization ────────────────────────── */
.bars-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.bar-label {
  font-weight: 800;
  font-size: 0.9rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.bar-track {
  flex: 1 1 auto;
  height: 14px;
  background: #f0f0f0;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid #e0e0e0;
}

.bar {
  height: 100%;
  border-radius: 999px;
  transition: width 0.05s;
}

.r-bar { background: var(--r-color); }
.g-bar { background: var(--g-color); }
.b-bar { background: var(--b-color); }

.bar-value {
  font-size: 0.85rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  width: 32px;
  text-align: right;
  color: #555;
  flex-shrink: 0;
}

/* ── Info section ─────────────────────────────── */
.info-section {
  border-top: 1px solid #eee;
  padding-top: 20px;
}

.info-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--brand);
  margin: 0 0 10px;
  text-align: left;
  letter-spacing: 0;
  text-shadow: none;
}

.info-text {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #444;
  margin-bottom: 16px;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.tip-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: #f8f9fb;
  border: 1px solid #e8eaef;
  border-radius: 10px;
  padding: 10px 6px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s, border-color 0.1s;
  user-select: none;
  text-align: center;
}

.tip-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
  border-color: #b0b6c4;
}

.tip-card:active {
  transform: translateY(0);
  box-shadow: none;
}

.tip-card:focus-visible {
  outline: 3px solid #66ccff;
  outline-offset: 2px;
}

.tip-swatch {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
}

.tip-body {
  min-width: 0;
}

.tip-name {
  font-weight: 700;
  font-size: 0.8rem;
  color: #222;
  line-height: 1.3;
}

.tip-code {
  font-size: 0.65rem;
  color: #666;
  font-family: 'Courier New', monospace;
  white-space: nowrap;
}

/* ── Mixing sections ──────────────────────────── */
.mixing-section {
  border-top: 1px solid #eee;
  padding-top: 20px;
  margin-top: 4px;
}

/* ── Flashlight demo ──────────────────────────── */
.fl-demo {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fl-stage {
  position: relative;
  background: #0d0d0d;
  border-radius: 14px;
  height: 260px;
  overflow: hidden;
  isolation: isolate;
  box-shadow: inset 0 2px 12px rgba(0,0,0,0.5);
}

.fl-beam {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  margin-top: -100px;
  margin-left: -100px;
  mix-blend-mode: screen;
  pointer-events: none;
}

.fl-beam-1 { animation: flMove1 3.2s ease-in-out infinite; }
.fl-beam-2 { animation: flMove2 3.2s ease-in-out infinite; }
.fl-beam-3 { animation: flMove3 3.2s ease-in-out infinite; }

@keyframes flMove1 {
  0%, 100% { transform: translate(-115px, -60px); }
  45%, 55% { transform: translate(0, 0); }
}

@keyframes flMove2 {
  0%, 100% { transform: translate(115px, -60px); }
  45%, 55% { transform: translate(0, 0); }
}

@keyframes flMove3 {
  0%, 100% { transform: translate(0, 120px); }
  45%, 55% { transform: translate(0, 0); }
}

.fl-icon {
  position: absolute;
  font-size: 1.3rem;
  pointer-events: none;
  opacity: 0.55;
}

.fl-icon-1 { top: 10px; left: 10px; }
.fl-icon-2 { top: 10px; right: 10px; transform: scaleX(-1); }
.fl-icon-3 { bottom: 10px; left: 50%; transform: translateX(-50%) rotate(90deg); }

.fl-controls {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.fl-ctrl {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: #555;
}

.fl-dot {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
}

.fl-ctrl select {
  font-size: 0.9rem;
  padding: 4px 8px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #fafafa;
  cursor: pointer;
}

.fl-result {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  color: #444;
  flex-wrap: wrap;
}

.fl-cname {
  font-weight: 700;
}

.fl-plus, .fl-arrow {
  color: #888;
}

.fl-mix-swatch {
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,0.15);
  flex-shrink: 0;
  transition: background 0.3s;
}

/* ── Ink mixing animation ─────────────────────── */
.ink-anim {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

.ink-stage {
  position: relative;
  background: #f8f8f2;
  border-radius: 14px;
  height: 260px;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid #e0e0d0;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.06);
}

.ink-blob {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  margin-top: -100px;
  margin-left: -100px;
  mix-blend-mode: multiply;
}

.ink-blob-1 { animation: flMove1 3.2s ease-in-out infinite; }
.ink-blob-2 { animation: flMove2 3.2s ease-in-out infinite; }
.ink-blob-3 { animation: flMove3 3.2s ease-in-out infinite; }

/* ── CMY Venn diagram ─────────────────────────── */
.cmy-demo {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cmy-stage {
  position: relative;
  width: 240px;
  height: 200px;
  margin: 0 auto;
  isolation: isolate;
}

.cmy-circle {
  position: absolute;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  mix-blend-mode: multiply;
  opacity: 0.88;
}

.cmy-c { background: #00ffff; top: 10px; left: 10px; }
.cmy-m { background: #ff00ff; bottom: 10px; left: 55px; }
.cmy-y { background: #ffff00; top: 10px; right: 10px; }

.cmy-label {
  position: absolute;
  font-size: 0.7rem;
  font-weight: 700;
  color: #555;
  pointer-events: none;
  white-space: nowrap;
}

.cmy-mix-label {
  position: absolute;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  pointer-events: none;
  white-space: nowrap;
  text-shadow: 0 1px 3px rgba(0,0,0,0.6);
}

.cmy-center-label {
  color: #eee !important;
}

.cmy-legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.cmy-legend-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: #555;
}

.cmy-leg-swatch {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  flex-shrink: 0;
}

/* ── Comparison table ─────────────────────────── */
.cmy-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  font-size: 0.82rem;
}

.compare-col {
  background: #f8f9fb;
  border: 1px solid #e8eaef;
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.compare-title {
  font-weight: 700;
  font-size: 0.85rem;
  color: #333;
  margin-bottom: 4px;
  border-bottom: 1px solid #e0e4ea;
  padding-bottom: 4px;
}

.compare-row {
  display: flex;
  align-items: center;
  gap: 3px;
  color: #444;
}

.compare-dot {
  display: inline-block;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  flex-shrink: 0;
}

@media (max-width: 520px) {
  body { padding: 14px; }

  .color-preview { height: 120px; }

  .hex-display { font-size: 1.2rem; }

  .tips-grid {
    grid-template-columns: repeat(2, 1fr);
  }


  .value-input { width: 52px; font-size: 0.9rem; }

  .fl-stage, .ink-stage { height: 200px; }

  @keyframes flMove1 {
    0%, 100% { transform: translate(-80px, -44px); }
    45%, 55% { transform: translate(0, 0); }
  }
  @keyframes flMove2 {
    0%, 100% { transform: translate(80px, -44px); }
    45%, 55% { transform: translate(0, 0); }
  }
  @keyframes flMove3 {
    0%, 100% { transform: translate(0, 86px); }
    45%, 55% { transform: translate(0, 0); }
  }

  .cmy-compare { grid-template-columns: 1fr; }
}