:root {
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--tt-bg, #f5f7fb);
  color: var(--tt-text, #172033);
  font-family: var(--tt-font, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
}

.page-shell {
  width: min(100% - 32px, var(--tt-maxw, 1040px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.tool-card,
.content-slot {
  background: var(--tt-surface, #ffffff);
  border: 1px solid var(--tt-line, #d9e1ef);
  border-radius: var(--tt-radius, 12px);
  box-shadow: var(--tt-shadow, 0 14px 40px rgba(23, 32, 51, 0.08));
}

.tool-card {
  padding: clamp(20px, 4vw, 36px);
}

.tool-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--tt-gap, 20px);
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--tt-primary, #2563eb);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.05;
}

.intro {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--tt-muted, #5d6b82);
  line-height: 1.6;
}

.clear-button {
  flex: 0 0 auto;
  border: 0;
  border-radius: calc(var(--tt-radius, 12px) - 2px);
  background: var(--tt-primary, #2563eb);
  color: var(--tt-surface, #ffffff);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 12px 18px;
}

.clear-button:hover,
.clear-button:focus-visible {
  background: var(--tt-primary-dark, #1d4ed8);
}

.status-row {
  margin: 0 0 18px;
  padding: 12px 14px;
  border: 1px solid var(--tt-line, #d9e1ef);
  border-radius: calc(var(--tt-radius, 12px) - 2px);
  background: var(--tt-primary-soft, #e9f1ff);
  color: var(--tt-text, #172033);
}

.converter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--tt-gap, 20px);
}

.unit-row {
  min-width: 0;
}

.unit-row label {
  display: block;
  margin-bottom: 8px;
  color: var(--tt-text, #172033);
  font-weight: 700;
}

.unit-row input {
  width: 100%;
  border: 1px solid var(--tt-line, #d9e1ef);
  border-radius: calc(var(--tt-radius, 12px) - 2px);
  background: var(--tt-surface-soft, #fbfdff);
  color: var(--tt-text, #172033);
  font: inherit;
  font-size: 1.05rem;
  padding: 12px 14px;
}

.unit-row input:focus {
  border-color: var(--tt-primary, #2563eb);
  box-shadow: 0 0 0 3px var(--tt-primary-soft, #e9f1ff);
  outline: none;
}

.unit-row.has-error input {
  border-color: var(--tt-danger, #b42318);
}

.field-error {
  min-height: 1.25em;
  margin: 6px 0 0;
  color: var(--tt-danger, #b42318);
  font-size: 0.9rem;
}

.content-slot {
  margin-top: 24px;
  padding: clamp(20px, 4vw, 32px);
}

.content-slot h2 {
  margin-bottom: 10px;
}

.content-slot p {
  color: var(--tt-muted, #5d6b82);
  line-height: 1.7;
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, var(--tt-maxw, 1040px));
    padding-top: 16px;
  }

  .tool-header {
    display: block;
  }

  .clear-button {
    margin-top: 16px;
    width: 100%;
  }
}