:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --surface-page: #f7f8fa;
  --surface-card: #ffffff;
  --text-body: #1a1d23;
  --text-secondary: #4b5563;
  --text-muted: #8a8f98;
  --border-default: #d8dbe0;
  --grid: #e5e7eb;
  --input-bg: #ffffff;

  --accent: #2b5a8a;
  --focus-ring: #2b5a8a;

  --radius-card: 10px;
  --radius-input: 6px;
  --radius-pill: 999px;
  --radius-tooltip: 6px;

  --font-size-h2: 0.95rem;
  --font-size-label: 0.85rem;
  --font-size-tiny: 0.76rem;
  --font-size-small: 0.85rem;
  --letter-spacing-eyebrow: 0.04em;
  --transition-fast: 0.15s ease;
  --shadow-tooltip: 0 4px 14px rgba(0, 0, 0, 0.15);

  --danger-bg: #fdecea;
  --danger-fg: #7a1f16;
  --danger-border: #f3b9b2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-page: #14161a;
    --surface-card: #1c1f26;
    --text-body: #edeef0;
    --text-secondary: #b7bcc4;
    --text-muted: #7d838d;
    --border-default: #343943;
    --grid: #2a2e36;
    --input-bg: #21252c;

    --accent: #5b9bf0;
    --focus-ring: #5b9bf0;

    --danger-bg: #3a201d;
    --danger-fg: #ffb4ab;
    --danger-border: #6b352e;

    --status-normal: #4cbf7d;
    --status-elevated: #e0a934;
    --status-stage1: #e2884f;
    --status-stage2: #ef6259;
    --status-urgency: #ff8fab;
  }
}

body {
  margin: 0;
  padding: 24px 16px 64px;
}

.page {
  max-width: 900px;
  margin: 0 auto;
}

.app-header {
  padding: 0 20px;
}

.app-header h1 {
  margin: 0 0 4px;
  font-size: 1.4rem;
}

.subtitle {
  margin: 0 0 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: end;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-group .group-label {
  font-size: var(--font-size-label);
  color: var(--text-secondary);
}

.fields-inline {
  display: flex;
  gap: 16px;
  align-items: end;
}

.field-divider {
  display: none;
}

@media (max-width: 799px) {
  .field-group {
    flex-basis: 100%;
  }
}

@media (min-width: 800px) {
  .field-row {
    justify-content: space-between;
  }

  .field-divider {
    display: block;
    align-self: end;
    width: 1px;
    height: 44px;
    background: var(--border-default);
  }
}

.inline-fields {
  display: flex;
  gap: 6px;
}

.inline-fields input {
  width: 80px;
}

.field-note {
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: var(--font-size-tiny);
}

#result-card {
  margin-top: 18px;
}

.result-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0 0 6px;
}

.result-meta strong {
  color: var(--text-body);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 14px;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
}

th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--grid);
}

th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: var(--font-size-label);
}

.reference-values {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: var(--font-size-small);
}