/* =========================================================
   DoseRef — Brand tokens
   Drop this into public/, link from index.html ABOVE tailwind.
   Reference via var(--token-name); do not hardcode hex.
   ========================================================= */

:root {
  /* Surfaces */
  --paper:        #faf8f5;  /* primary background (light) */
  --paper-deep:   #f3efe9;  /* secondary / inset background */
  --ink:          #1a1814;  /* primary background (dark) / primary text (light) */
  --ink-soft:     #4a4740;  /* secondary text */
  --ink-muted:    #8a857a;  /* tertiary text, labels */
  --rule:         #e5dfd4;  /* borders, dividers */

  /* Brand accent — indigo */
  --indigo:       oklch(0.42 0.14 256);  /* primary accent, brand dot */
  --indigo-light: oklch(0.72 0.12 256);  /* dark-mode accent */
  --indigo-wash:  oklch(0.96 0.02 256);  /* indigo backgrounds */
  --indigo-edge:  oklch(0.88 0.04 256);  /* indigo borders */

  /* Caution — ochre (dose caps, non-safety cautions) */
  --ochre:        oklch(0.66 0.14 65);
  --ochre-wash:   oklch(0.95 0.04 80);
  --ochre-edge:   oklch(0.84 0.08 75);
  --ochre-text:   oklch(0.42 0.1 65);

  /* Safety warnings — crimson (BBW, allergy, hypersensitivity) */
  --crimson:        oklch(0.52 0.17 25);
  --crimson-wash:   oklch(0.95 0.03 25);
  --crimson-edge:   oklch(0.83 0.08 25);
  --crimson-text:   oklch(0.32 0.12 25);

  /* Typography */
  --font-mono:   'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-caps:   'IBM Plex Mono', ui-monospace, Menlo, monospace;
  --font-prose:  'Inter', system-ui, -apple-system, sans-serif;

  /* Numeric display scale (dose answers) */
  --fs-answer:   36px;   /* primary dose number */
  --fs-answer-unit: 22px;
  --fs-convert:  22px;   /* secondary answer (e.g. mL) */
  --fs-weight:   22px;   /* weight input display value */

  /* Reference-book scale (labels, monograms) */
  --fs-monogram: 10px;   /* § labels — track 0.14em, uppercase */
  --fs-meta:     11px;
  --fs-prose:    14px;   /* body prose */
  --fs-prose-sm: 12px;

  /* Radii — restrained, not bubbly */
  --r-card:      6px;
  --r-stamp:     4px;
  --r-pill:      100px;
}

/* Dark mode — flip surfaces, not hues */
.theme-dark {
  --paper:        #1a1814;  /* ink becomes bg */
  --paper-deep:   #22201b;
  --ink:          #faf8f5;  /* paper becomes fg */
  --ink-soft:     rgba(250, 248, 245, 0.80);
  --ink-muted:    rgba(250, 248, 245, 0.50);
  --rule:         rgba(250, 248, 245, 0.12);

  --indigo:       oklch(0.72 0.12 256);  /* use light variant for fg */
  --indigo-wash:  rgba(110, 130, 220, 0.12);
  --indigo-edge:  rgba(110, 130, 220, 0.30);

  --ochre-wash:   rgba(200, 130, 40, 0.12);
  --ochre-text:   oklch(0.82 0.10 65);

  --crimson-wash: rgba(180, 40, 40, 0.15);
  --crimson-text: oklch(0.85 0.08 25);
}

/* =========================================================
   Utility classes — use for drug-detail redesign
   Named for semantic role, not visual property.
   ========================================================= */

/* Monograms — "§ Section Name" in mono caps */
.monogram {
  font-family: var(--font-mono);
  font-size: var(--fs-monogram);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 500;
}

/* Numeric display (dose answer) */
.numeric-answer {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-answer);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.numeric-answer .unit {
  font-size: var(--fs-answer-unit);
  font-weight: 500;
  color: var(--ink-muted);
  margin-left: 4px;
  letter-spacing: -0.01em;
}

/* Math expression — above the answer, grey, mono */
.numeric-math {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: -0.01em;
  color: var(--ink-muted);
  line-height: 1.4;
}
.numeric-math .v  { color: var(--ink); font-weight: 500; }
.numeric-math .op { color: var(--ink-muted); margin: 0 4px; }

/* Brand-name lists (Amoxil · Moxatag · Trimox) */
.brand-list {
  font-family: var(--font-caps);
  font-size: var(--fs-meta);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* =========================================================
   Semantic state classes — use instead of bg-yellow-xxx etc.
   ========================================================= */

.surface-paper      { background: var(--paper); color: var(--ink); }
.surface-paper-deep { background: var(--paper-deep); color: var(--ink); }
.surface-ink        { background: var(--ink); color: var(--paper); }

.border-rule { border-color: var(--rule); }

.callout-cap {
  border-left: 2px solid var(--ochre);
  background: var(--ochre-wash);
  color: var(--ochre-text);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
}
.callout-note {
  border-left: 2px solid var(--ink-muted);
  background: var(--paper-deep);
  color: var(--ink-soft);
  padding: 10px 14px;
  font-size: var(--fs-prose-sm);
  line-height: 1.5;
}
.callout-warn {
  border: 1px solid var(--crimson);
  border-radius: var(--r-stamp);
  overflow: hidden;
}
.callout-warn > .head {
  background: var(--crimson);
  color: var(--paper);
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-monogram);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
}
.callout-warn > .body {
  background: var(--crimson-wash);
  color: var(--crimson-text);
  padding: 12px 14px;
  font-size: var(--fs-prose-sm);
  line-height: 1.5;
}

/* =========================================================
   Drug-detail page layout
   ========================================================= */

/* Drug header */
.drug-head {
  padding: 20px 0 14px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0;
}
.drug-name {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink);
  margin-bottom: 6px;
}
.meta-row {
  display: flex;
  gap: 14px;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.meta-row .k {
  color: var(--ink-muted);
  margin-right: 6px;
}

/* Patient-type segmented tab */
.seg {
  display: flex;
  gap: 0;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}
.seg-btn {
  flex: 1;
  padding: 10px 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-muted);
  text-align: center;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-family: var(--font-prose);
  background: transparent;
  cursor: pointer;
}
.seg-btn.on {
  color: var(--ink);
  border-bottom-color: var(--ink);
  font-weight: 600;
}

/* Indication chips */
.ind-chip {
  padding: 6px 11px;
  font-size: 12px;
  border: 1px solid var(--rule);
  border-radius: var(--r-stamp);
  color: var(--ink-soft);
  background: transparent;
  font-family: var(--font-prose);
  cursor: pointer;
}
.ind-chip.on {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  font-weight: 500;
}

/* Weight input */
.weight-row {
  display: flex;
  gap: 0;
  margin-bottom: 14px;
}
.w-input-wrap {
  flex: 1;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  border-right: 0;
  border-radius: var(--r-card) 0 0 var(--r-card);
  background: var(--paper);
}
.w-input-wrap .k {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.w-input-wrap input {
  font-family: var(--font-mono);
  font-size: var(--fs-weight);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  background: transparent;
  border: none;
  outline: none;
  width: 100%;
  padding: 0;
}
.w-unit-toggle {
  display: flex;
  border: 1px solid var(--rule);
  border-radius: 0 var(--r-card) var(--r-card) 0;
  overflow: hidden;
  background: var(--paper);
}
.w-unit-toggle button {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0 12px;
  background: transparent;
  color: var(--ink-muted);
  border: 0;
  cursor: pointer;
}
.w-unit-toggle button.on {
  background: var(--ink);
  color: var(--paper);
}

/* Form selector */
.form-select {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  border-radius: var(--r-card);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink);
  letter-spacing: 0.01em;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.form-select:focus {
  outline: none;
  border-color: var(--ink-muted);
}

/* Answer block — the money block */
.answer-block {
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--paper);
  overflow: hidden;
  margin-bottom: 10px;
}
.answer-stamp {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.answer-stamp .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--indigo);
}
.answer-body {
  padding: 18px 20px 16px;
}
.answer-freq {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.convert {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: nowrap;
  padding: 12px 0 0;
  border-top: 1px dashed var(--rule);
  white-space: nowrap;
}
.convert .arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-muted);
}
.convert-value {
  font-family: var(--font-mono);
  font-size: var(--fs-convert);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}
.convert-unit {
  font-size: 14px;
  color: var(--ink-muted);
  font-weight: 500;
}
.convert-of {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}

/* Adjustments table */
.adj-section {
  padding-top: 28px;
}
.adj-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0;
}
.adj-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}
.adj-card:last-child {
  border-bottom: 0;
}
.adj-k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding-top: 1px;
}
.adj-v {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
}

/* Footer */
.drug-footer {
  padding: 28px 0 36px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  border-top: 1px solid var(--rule);
  margin-top: 20px;
}

/* =========================================================
   Topbar — wordmark, back button, search display
   ========================================================= */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 52px;
  padding: 0 1rem;
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  margin: -1rem -1rem 0;
}

.topbar .back {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-muted);
  cursor: pointer;
  background: transparent;
  border: 0;
  padding: 0;
  flex-shrink: 0;
}

.wordmark {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--ink);
  flex-shrink: 0;
}
.wordmark .dot {
  color: var(--indigo);
}

.topbar .search {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-muted);
  padding: 7px 12px;
  background: var(--paper-deep);
  border-radius: 6px;
  border: 1px solid var(--rule);
  letter-spacing: 0.02em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  cursor: pointer;
}

/* =========================================================
   Home screen — hero, search card, tools, recents, footer
   ========================================================= */

body {
  background: var(--paper-deep);
  color: var(--ink);
}
/* In dark mode, --paper-deep is lighter than --paper —
   reverse so page = darkest, cards = slightly lighter */
.theme-dark body { background: var(--paper); }
.theme-dark .search-card,
.theme-dark .tool { background: var(--paper-deep); }

/* Hero wordmark block */
.hero {
  text-align: center;
  padding: 28px 24px 20px;
}
.hero-mark {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 44px;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--ink);
}
.hero-mark .dot { color: var(--indigo); }
.hero-rule {
  width: 48px;
  height: 1px;
  background: var(--rule);
  margin: 14px auto;
}
.hero-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}
.hero-op {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border: 1px solid var(--ink-muted);
  border-radius: 2px;
  font-weight: 600;
  font-size: 10px;
}

/* Search card */
.search-card {
  margin: 24px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: var(--paper);
  position: relative;
}
.search-card .monogram {
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.search-card .monogram .dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--indigo);
  flex-shrink: 0;
}
.search-input-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.search-icon { color: var(--ink-muted); flex-shrink: 0; }
.search-input-row input {
  flex: 1;
  border: 0;
  background: transparent;
  outline: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.search-input-row input::placeholder { color: var(--ink-muted); }
.search-hint {
  display: flex;
  gap: 14px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}
.kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  margin-right: 4px;
  background: var(--paper-deep);
  color: var(--ink-soft);
}

/* Search results dropdown — falls below search card */
#searchResults {
  position: absolute;
  top: 100%;
  left: -1px;
  right: -1px;
  margin-top: 4px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-card);
  max-height: 320px;
  overflow-y: auto;
  z-index: 50;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Tools grid */
.tools-head {
  padding: 32px 0 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.tools-n { margin-right: 8px; }
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.tool {
  -webkit-appearance: none;
  appearance: none;
  padding: 14px 14px 16px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--paper);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 108px;
  text-align: left;
}
.tool .glyph {
  width: 32px;
  height: 32px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
}
.tool .tool-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.tool .tool-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: auto;
}

/* Recents */
.recents-head {
  padding: 32px 0 10px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.recents-l { color: var(--ink-muted); }
.recents-n { margin-right: 8px; }
.recents-r { color: var(--ink-muted); font-size: 9px; }
.recent-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  gap: 14px;
  cursor: pointer;
}
.recent-row:first-child { border-top: 1px solid var(--rule); }
.recent-main {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  overflow: hidden;
}
.recent-name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.recent-ind {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  text-transform: uppercase;
  white-space: nowrap;
}
.recent-age {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  white-space: nowrap;
}
.recents-empty {
  padding: 16px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}

/* Home screen footer */
.hs-footer {
  padding: 28px 0 42px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  border-top: 1px solid var(--rule);
  margin-top: 28px;
  line-height: 1.8;
}
.hs-footer-l2 {
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 10px;
  margin-top: 6px;
  color: var(--ink-muted);
}