:root {
  --color-paper: #f4f1e8;
  --color-paper-deep: #ece7d9;
  --color-ink: #1c1b18;
  --color-ink-soft: #6b665b;
  --color-line: #d9d3c3;
  --color-accent: #d8442a;
  --color-accent-deep: #b0331d;
  --color-mark: #e0a92e;
  --font-display: Inter, Noto Sans TC, sans-serif;
  --font-body: Inter, Noto Sans TC, sans-serif;
  --font-mono: Inter, Noto Sans TC, sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

.tool-intro {
  max-width: 64ch;
  margin-block: 24px 40px;
  color: #6b665b;
}

.extractor-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding-bottom: 96px;
}

.extractor-input {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.dropzone-icon {
  color: #6b665b;
  margin-bottom: 4px;
}

.dropzone-sub {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: #d9d3c3;
  margin-top: -4px;
}

.image-preview {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.image-preview img {
  display: block;
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border: 1.5px solid #1c1b18;
  border-radius: 2px;
}

.image-preview-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.image-preview-meta {
  color: #6b665b;
}

.control-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #6b665b;
}

.count-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.count-row output {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #d8442a;
  min-width: 1.5em;
  text-align: right;
}

input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: #d9d3c3;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #1c1b18;
  border: 2.5px solid #f4f1e8;
  box-shadow: 0 0 0 1.5px #1c1b18;
  transition: background 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
input[type=range]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #1c1b18;
  border: 2.5px solid #f4f1e8;
  box-shadow: 0 0 0 1.5px #1c1b18;
  cursor: pointer;
}
input[type=range]:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px #d8442a;
}
input[type=range]:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 3px #d8442a;
}

.extractor-output {
  min-width: 0;
}

.palette-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  border: 1.5px dashed #d9d3c3;
  border-radius: 2px;
  color: #6b665b;
}

.palette-computing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 300px;
  color: #6b665b;
}

@keyframes dot-pulse {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.3;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}
.computing-dots {
  display: flex;
  gap: 8px;
}
.computing-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #6b665b;
  animation: dot-pulse 1.4s ease-in-out infinite;
}
.computing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}
.computing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

.palette-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

@keyframes palette-row-in {
  from {
    opacity: 0;
    transform: translateX(-6px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
.palette-row {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  min-height: 84px;
  border: 1.5px solid #1c1b18;
  border-radius: 2px;
  overflow: hidden;
  animation: palette-row-in 0.3s cubic-bezier(0.22, 0.61, 0.36, 1) both;
  animation-delay: calc(var(--i, 0) * 0.045s);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.palette-row:hover {
  transform: translateX(4px);
  box-shadow: -5px 5px 0 rgba(28, 27, 24, 0.1);
}

.palette-swatch {
  min-height: 84px;
}

.palette-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 16px;
  background: #ece7d9;
}

.palette-value-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.palette-format-tag {
  flex: 0 0 auto;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #6b665b;
  min-width: 2.6em;
}

.palette-value {
  flex: 1 1 auto;
  min-width: 0;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.03em;
  color: #1c1b18;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.palette-copy-btn {
  flex: 0 0 auto;
  padding: 2px 8px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 11px;
  letter-spacing: 0.04em;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  background: transparent;
  color: #6b665b;
  cursor: pointer;
  transition: background 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), border-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.palette-copy-btn:hover {
  background: #1c1b18;
  color: #f4f1e8;
  border-color: #1c1b18;
}
.palette-copy-btn.is-copied {
  background: #d8442a;
  color: #f4f1e8;
  border-color: #d8442a;
}

.palette-pct {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 2px;
}

.palette-pct-bar {
  flex: 1;
  height: 2px;
  background: #d9d3c3;
  border-radius: 1px;
  overflow: hidden;
}

.palette-pct-fill {
  height: 100%;
  background: #1c1b18;
  border-radius: 1px;
}

.palette-pct-label {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: #6b665b;
  min-width: 3.4em;
  text-align: right;
}

.palette-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid #d9d3c3;
}

.palette-sample-note {
  margin-left: auto;
  color: #6b665b;
}

@media (max-width: 720px) {
  .extractor-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 40px;
  }
}