: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: 100%;
  margin-block: 24px 40px;
  color: #6b665b;
}
.tool-intro .tag {
  margin-right: 4px;
}

.converter {
  max-width: 100%;
}

.unit-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.unit-tab {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  padding: 8px 16px;
  color: #6b665b;
  background: #f4f1e8;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  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);
}
.unit-tab:hover {
  color: #1c1b18;
  border-color: #1c1b18;
}
.unit-tab.is-active {
  color: #f4f1e8;
  background: #d8442a;
  border-color: #d8442a;
}

.settings {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 16px 24px;
  margin-bottom: 24px;
  background: #ece7d9;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
}
.settings[hidden] {
  display: none;
}

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

.setting-label {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: #6b665b;
}

.setting-field {
  display: flex;
  align-items: center;
  gap: 8px;
}

.setting-input {
  width: 96px;
  padding: 8px 16px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  color: #1c1b18;
  background: #f4f1e8;
  border: 1.5px solid #1c1b18;
  border-radius: 2px;
  font-variant-numeric: tabular-nums;
}
.setting-input:focus {
  outline: none;
  border-color: #d8442a;
}

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

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.preset-chip {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  padding: 4px 8px;
  color: #6b665b;
  background: #f4f1e8;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  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);
}
.preset-chip:hover {
  color: #1c1b18;
  border-color: #1c1b18;
}

.unit-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.unit-row {
  display: grid;
  grid-template-columns: minmax(120px, 200px) minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
}

.unit-label {
  font-size: 1rem;
  color: #1c1b18;
}

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

.unit-input {
  width: 100%;
  min-width: 0;
  padding: 8px 16px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: #1c1b18;
  background: #f4f1e8;
  border: 1.5px solid #1c1b18;
  border-radius: 2px;
  font-variant-numeric: tabular-nums;
  transition: border-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.unit-input:focus {
  outline: none;
  border-color: #d8442a;
}
.unit-input.is-invalid {
  border-color: #d8442a;
}

.unit-copy {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  padding: 8px 16px;
  color: #6b665b;
  background: #f4f1e8;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  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);
}
.unit-copy:hover {
  color: #1c1b18;
  border-color: #1c1b18;
}

.copy-hint {
  min-height: 1.4em;
  margin: 24px 0 0;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  color: #d8442a;
}

.unit-note {
  margin: 8px 0 0;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: #6b665b;
}

@media (max-width: 560px) {
  .unit-row {
    grid-template-columns: minmax(96px, 1fr) minmax(0, 1.4fr) auto;
    gap: 8px;
  }
}