: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: 60ch;
  margin-block: 24px 16px;
  color: #6b665b;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-block: 16px;
  border-bottom: 1px solid #d9d3c3;
  position: sticky;
  top: 0;
  z-index: 2;
  background: #f4f1e8;
}

.filter-chip {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  padding: 4px 16px;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  color: #6b665b;
  background: transparent;
  cursor: pointer;
  transition: 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), background-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.filter-chip:hover {
  color: #1c1b18;
  border-color: #1c1b18;
}
.filter-chip.is-active {
  color: #f4f1e8;
  background: #d8442a;
  border-color: #d8442a;
}

.platform-block {
  padding-block: 40px 16px;
  border-bottom: 1px solid #d9d3c3;
}
.platform-block:last-child {
  border-bottom: 0;
}

.platform-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 8px;
}

.platform-name {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1.75rem;
}

.platform-count {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  color: #6b665b;
}

.platform-note {
  max-width: 60ch;
  margin-bottom: 24px;
  font-size: 1rem;
  color: #6b665b;
}

.size-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.size-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  background: #ece7d9;
  cursor: pointer;
  transition: border-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.size-card:hover {
  border-color: #d8442a;
  transform: translateY(-2px);
}

.ratio-preview {
  display: grid;
  place-items: center;
  height: 96px;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  background: repeating-linear-gradient(45deg, transparent 0 6px, color-mix(in srgb, #1c1b18 4%, transparent) 6px 7px);
}

.ratio-shape {
  background: #1c1b18;
  border-radius: 1px;
}

.size-card-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.size-card-label {
  font-size: 1rem;
  font-weight: 500;
}

.size-card-dim {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1.25rem;
  color: #d8442a;
}

.size-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.size-card-copy {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: #6b665b;
  opacity: 0;
  transition: opacity 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.size-card:hover .size-card-copy {
  opacity: 1;
}

.size-card.is-copied .size-card-copy {
  opacity: 1;
  color: #d8442a;
}

.empty-state {
  padding-block: 64px;
  text-align: center;
  color: #6b665b;
}