/* Shared layout + calculator for /dose/* SEO pages
   Desktop: content left, calculator sticky right
   Mobile: calculator first, article text follows */

:root {
  --bg: #f4f6fb;
  --surface: #fff;
  --surface2: #eef1f8;
  --border: #dde2ee;
  --border2: #c5cde0;
  --text: #0b0f1a;
  --text2: #3f3f50;
  --text3: #64708b;
  --text4: #93a0b8;
  --blue: #2563eb;
  --blue-lt: #eff6ff;
  --blue-mid: #dbeafe;
  --amber: #b45309;
  --amber-bg: #fffbeb;
  --amber-bd: #fde68a;
  --green: #15803d;
  --green-lt: #f0fdf4;
  --orange: #ea580c;
  --red: #dc2626;
  --r: 14px;
  --rs: 10px;
  --sh: 0 1px 2px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Geist', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.hrow {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  color: var(--text);
}
.logo span { color: var(--blue); }

.hnav {
  margin-left: auto;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hnav a {
  font-size: 13px;
  color: var(--text3);
  text-decoration: none;
}

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.page-intro { margin-bottom: 18px; }

h1 {
  font-size: clamp(1.45rem, 4vw, 2rem);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  line-height: 1.25;
}

.lead {
  color: var(--text3);
  font-size: 15px;
  margin-bottom: 16px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  font-size: 11px;
  font-weight: 600;
  color: var(--text3);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 9px;
}
.chip strong { color: var(--text); }

/* Two-column: calc first on mobile, right on desktop */
.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
  margin-bottom: 18px;
}
.layout-main { min-width: 0; order: 2; }
.layout-aside { min-width: 0; order: 1; }

@media (min-width: 900px) {
  .layout {
    grid-template-columns: 1fr minmax(340px, 420px);
    gap: 24px;
  }
  .layout-main { order: 1; }
  .layout-aside {
    order: 2;
    position: sticky;
    top: 76px;
    max-height: calc(100vh - 92px);
    overflow-y: auto;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px 20px;
  margin-bottom: 14px;
}
.card:last-child { margin-bottom: 0; }
.card h2 { font-size: 15px; margin-bottom: 8px; }
.card h3 { font-size: 14px; margin: 12px 0 4px; }
.card p,
.card li { font-size: 14px; color: var(--text3); }
.card ul { padding-left: 18px; margin-top: 6px; }
.card a { color: var(--blue); }

.cta {
  display: inline-block;
  margin-top: 10px;
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: #fff;
  padding: 12px 18px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  font-size: 14px;
}

.warn-page {
  font-size: 12px;
  color: var(--amber);
  background: var(--amber-bg);
  border: 1px solid var(--amber-bd);
  border-radius: 8px;
  padding: 12px;
  margin: 16px 0;
}

.trust { background: var(--green-lt); border-color: #bbf7d0; }
.trust p { color: #166534; }

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.faq-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.faq-item h3 {
  font-size: 14px;
  color: var(--text);
  margin: 0 0 4px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 24px 20px;
  font-size: 12px;
  color: var(--text3);
  text-align: center;
}
footer a { color: var(--blue); }

.dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 6px 12px;
  font-size: 14px;
  margin-top: 8px;
}
.dl dt { color: var(--text3); font-weight: 600; }
.dl dd { color: var(--text2); margin: 0; }
@media (max-width: 520px) {
  .dl { grid-template-columns: 1fr; }
}

/* ── Calculator shell ── */
.calc-shell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  overflow: hidden;
}

.calc-head {
  background: linear-gradient(135deg, #0f172a, #1e3a8a);
  color: #fff;
  padding: 14px 16px;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.calc-head .db-pill {
  font-size: 10px;
  font-weight: 600;
  opacity: 0.85;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 3px 8px;
  white-space: nowrap;
}

.calc-panel { padding: 14px 16px 16px; }

.mode-row {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
}
.mode-btn {
  flex: 1;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text3);
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.mode-btn.on {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 10px;
}
.field.full { grid-column: 1 / -1; }

.field label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text3);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.age-unit-toggle {
  display: inline-flex;
  background: var(--surface2);
  border-radius: 6px;
  padding: 1px;
  text-transform: none;
  letter-spacing: 0;
}
.age-unit-btn {
  border: none;
  background: none;
  font-family: inherit;
  font-size: 10px;
  font-weight: 700;
  color: var(--text4);
  padding: 2px 6px;
  border-radius: 5px;
  cursor: pointer;
}
.age-unit-btn.on {
  background: #fff;
  color: var(--text);
  box-shadow: var(--sh);
}

.field input,
.field select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  background: #f8fafc;
}
.field input:focus,
.field select:focus {
  outline: 2px solid var(--blue-mid);
  border-color: var(--blue);
}

.ulab {
  font-size: 11px;
  color: var(--text4);
  margin-top: 2px;
  font-weight: 500;
}

.flags-bar {
  display: none;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text2);
}
.flags-bar.show { display: flex; }
.flags-bar .flag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.est-bar,
.missing-notice,
.db-status {
  display: none;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
  padding: 8px 10px;
  border-radius: 8px;
}
.est-bar.show {
  display: block;
  color: var(--amber);
  background: var(--amber-bg);
  border: 1px solid var(--amber-bd);
}
.missing-notice.show {
  display: block;
  color: var(--amber);
  background: var(--amber-bg);
  border: 1px solid var(--amber-bd);
}
.db-status.show {
  display: block;
  color: var(--text3);
  background: var(--surface2);
  border: 1px solid var(--border);
}

.results { margin-top: 4px; }

.ind-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}
.ind-chip {
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 10px;
  cursor: pointer;
}
.ind-chip.on {
  background: var(--blue-lt);
  border-color: var(--blue-mid);
  color: var(--blue);
}

.rtabs {
  display: flex;
  gap: 4px;
  background: var(--surface2);
  border-radius: 10px;
  padding: 3px;
  margin-bottom: 10px;
}
.rtab {
  flex: 1;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  color: var(--text3);
  padding: 7px 6px;
  border-radius: 8px;
  cursor: pointer;
}
.rtab.on {
  background: #fff;
  color: var(--text);
  box-shadow: var(--sh);
  font-weight: 700;
}

.hero {
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
  color: #fff;
}
.hero-syr { background: linear-gradient(135deg, #1d4ed8, #2563eb); }
.hero-tab { background: linear-gradient(135deg, #0f766e, #0e7490); }
.hero-iv { background: linear-gradient(135deg, #7c2d12, #c2410c); }
.hero-note { background: linear-gradient(135deg, #334155, #475569); }
.hero-label {
  font-size: 11px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 4px;
}
.hero-num {
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.hero-val {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}
.hero-unit {
  font-size: 16px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
}
.hero-freq { color: #fff; }
.hero-perdose { color: rgba(255, 255, 255, 0.7); }

.strl {
  font-size: 10px;
  font-weight: 700;
  color: var(--text4);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 4px 0 6px;
}
.strrow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}
.strbtn {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text2);
  border-radius: 7px;
  padding: 6px 9px;
  cursor: pointer;
}
.strbtn.on {
  background: var(--blue-lt);
  border-color: var(--blue-mid);
  color: var(--blue);
}

.sec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
}
.sbox2 {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
}
.sbl {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text4);
  margin-bottom: 4px;
}
.sval {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
}
.ssub {
  font-size: 11px;
  color: var(--text3);
  margin-top: 3px;
}

.preg-banner {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid;
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 10px;
  font-size: 12px;
}
.preg-banner .pcat {
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
}

.warn,
.info,
.dnote,
.block-danger,
.nw,
.dur,
.verify {
  font-size: 12px;
  border-radius: 8px;
  padding: 9px 11px;
  margin-bottom: 8px;
}
.warn {
  color: var(--orange);
  background: #fff7ed;
  border: 1px solid #fed7aa;
  font-weight: 600;
}
.info {
  color: var(--blue);
  background: var(--blue-lt);
  border: 1px solid var(--blue-mid);
}
.dnote {
  color: var(--text3);
  background: var(--surface2);
  border: 1px solid var(--border);
}
.block-danger {
  color: #991b1b;
  background: #fef2f2;
  border: 1px solid #fecaca;
  font-weight: 600;
}
.nw {
  color: var(--text3);
  background: var(--surface2);
  border: 1px dashed var(--border2);
  text-align: center;
  font-weight: 600;
}
.dur {
  display: inline-block;
  color: var(--text2);
  background: var(--surface2);
  border: 1px solid var(--border);
  font-weight: 600;
  padding: 4px 8px;
}
.verify {
  color: var(--text4);
  font-size: 11px;
  padding: 0;
  margin-top: 8px;
}

.fline {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 8px;
}
.ftxt {
  font-size: 12px;
  color: var(--text2);
  white-space: pre-wrap;
  line-height: 1.45;
}

.iv-block {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
}
.iv-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text4);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.iv-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 12.5px;
  padding: 4px 0;
}
.ivk { color: var(--text3); }
.ivv {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-weight: 700;
  text-align: right;
}
.iv-warn {
  font-size: 11px;
  color: var(--red);
  margin-top: 8px;
  font-weight: 700;
}

.calc-note {
  font-size: 11px;
  color: var(--text3);
  margin-top: 10px;
}
.full-app {
  font-size: 12px;
  margin-top: 8px;
}
.full-app a {
  color: var(--blue);
  font-weight: 600;
}