/* ============================================================================
   Trichotology — Common Layout & Components
   Loads after tokens.css. Provides header, footer, containers, prose,
   disclaimer banners, clinical tables, and claim-shape tags.
   ============================================================================ */

/* ========== HEADER ========== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 10, 15, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gold-line);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--page-padding-x);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font: 500 var(--size-small)/1 var(--font-label);
  letter-spacing: 0.08em;
}
.site-header__brand:hover { color: var(--gold); }

.site-header__mark {
  width: 20px;
  height: 20px;
  opacity: 0.85;
}

.site-header__nav {
  display: flex;
  gap: 24px;
  align-items: center;
}
.site-header__nav a {
  color: var(--text-body);
  text-decoration: none;
  font: 400 var(--size-label)/1 var(--font-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color var(--dur-clinical) var(--ease-clinical);
}
.site-header__nav a:hover { color: var(--gold); }
.site-header__nav a[aria-current="page"] { color: var(--gold); }

.site-header__parent {
  color: var(--text-muted);
  font-size: 0.88em;
}
.site-header__parent::before {
  content: "\2196";
  margin-right: 4px;
  opacity: 0.7;
}

/* Mobile menu button — hidden on desktop */
.site-header__menu-btn {
  display: none;
  background: none;
  border: none;
  padding: 10px;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
}
.site-header__menu-btn span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--gold-dim);
  transition: transform var(--dur-clinical) var(--ease-clinical),
              opacity var(--dur-clinical) var(--ease-clinical);
}
.site-header__menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}
.site-header__menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.site-header__menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

@media (max-width: 640px) {
  .site-header__menu-btn { display: flex; }
  .site-header__nav {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(10,10,15,0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 16px var(--page-padding-x);
    border-bottom: 1px solid var(--gold-line);
    flex-direction: column;
    gap: 16px;
  }
  .site-header__nav[data-open="true"] {
    display: flex;
  }
  .site-header__nav a { display: block; padding: 4px 0; }
  .site-header__parent { font-size: 0.92em; }
}

/* ========== CONTAINERS ========== */

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--page-padding-x);
}
.container--wide {
  max-width: var(--content-wide);
}

/* ========== SECTIONS ========== */

.section {
  padding: var(--section-gap) 0;
}
.section--first {
  padding-top: clamp(32px, 5vh, 64px);
}

/* ========== DISCLAIMER BANNER ========== */

.disclaimer {
  background: var(--surface-caution);
  border: 1px solid var(--surface-caution-edge);
  border-radius: 4px;
  padding: 16px 20px;
  margin-bottom: var(--section-gap);
  font: 400 var(--size-small)/1.6 var(--font-body);
  color: var(--text-muted);
}
.disclaimer strong {
  color: var(--accent-amber);
  font-weight: 600;
}
.disclaimer a {
  color: var(--text-body);
  text-decoration: underline;
  text-decoration-color: var(--gold-line);
  text-underline-offset: 3px;
}
.disclaimer a:hover { text-decoration-color: var(--gold); }

/* ========== TYPOGRAPHY ========== */

.eyebrow {
  font: 500 var(--size-label)/1.3 var(--font-label);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin: 0 0 16px;
}

.heading-hero {
  font: 300 var(--size-hero)/1.05 var(--font-display);
  color: var(--text-primary);
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.heading-1 {
  font: 400 var(--size-h1)/1.15 var(--font-display);
  color: var(--text-primary);
  margin: 0 0 20px;
  letter-spacing: -0.005em;
}

.heading-2 {
  font: 400 var(--size-h2)/1.2 var(--font-display);
  color: var(--text-primary);
  margin: 2em 0 0.6em;
}

.heading-3 {
  font: 500 var(--size-h3)/1.3 var(--font-display);
  color: var(--text-primary);
  margin: 1.8em 0 0.5em;
}

.lead {
  font: 400 var(--size-lead)/1.65 var(--font-body);
  color: var(--text-body);
  font-style: italic;
  margin: 0 0 2em;
  max-width: 640px;
}

.prose p {
  font: 400 var(--size-body)/1.75 var(--font-body);
  color: var(--text-body);
  margin: 0 0 1.3em;
}
.prose p:last-child { margin-bottom: 0; }

.prose em {
  color: var(--text-primary);
  font-style: italic;
}
.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}
.prose a {
  color: var(--gold);
  text-decoration: underline;
  text-decoration-color: var(--gold-line);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--dur-clinical) var(--ease-clinical);
}
.prose a:hover,
.prose a:focus-visible {
  text-decoration-color: var(--gold);
}

.prose ul, .prose ol {
  padding-left: 1.5em;
  margin: 0 0 1.3em;
  color: var(--text-body);
  font: 400 var(--size-body)/1.75 var(--font-body);
}
.prose li { margin-bottom: 0.5em; }

.prose blockquote {
  margin: 1.8em 0;
  padding: 16px 22px;
  background: var(--void-raised);
  border-left: 3px solid var(--gold);
  border-radius: 0 4px 4px 0;
  font: 400 var(--size-body)/1.7 var(--font-body);
  color: var(--text-body);
}
.prose blockquote p { margin: 0; }
.prose blockquote p + p { margin-top: 0.8em; }

/* Framework term */
.term {
  font-family: var(--font-label);
  font-weight: 500;
  font-size: var(--term-size);
  letter-spacing: var(--term-tracking);
  color: var(--term-color);
  text-decoration: none;
  border-bottom: 1px dotted var(--gold-line);
  transition: color var(--dur-clinical) var(--ease-clinical),
              border-color var(--dur-clinical) var(--ease-clinical);
}
.term:hover,
.term:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

/* ========== CLINICAL TRANSLATION TABLE ========== */

.translation-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font: 400 var(--size-body)/1.6 var(--font-body);
}
.translation-table th {
  text-align: left;
  font: 500 var(--size-small)/1.3 var(--font-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-dim);
  padding: 12px 16px;
  border-bottom: 2px solid var(--gold-line);
  white-space: nowrap;
}
.translation-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--text-body);
  vertical-align: top;
}
.translation-table tr:last-child td {
  border-bottom: none;
}
.translation-table td:first-child {
  font-family: var(--font-label);
  font-weight: 500;
  font-size: var(--term-size);
  letter-spacing: var(--term-tracking);
  color: var(--term-color);
  white-space: nowrap;
  width: 1%;
}

@media (max-width: 640px) {
  .translation-table,
  .translation-table thead,
  .translation-table tbody,
  .translation-table th,
  .translation-table td,
  .translation-table tr {
    display: block;
  }
  .translation-table thead { display: none; }
  .translation-table tr {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
  }
  .translation-table td {
    padding: 4px 0;
    border-bottom: none;
    white-space: normal;
    width: auto;
  }
  .translation-table td:first-child {
    font-size: var(--size-body);
    margin-bottom: 4px;
  }
}

/* ========== CLAIM-SHAPE TAGS ========== */

.claim-tag {
  display: inline-block;
  font: 600 var(--size-label)/1 var(--font-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
  border: 1px solid;
}
.claim-tag--asserts {
  color: var(--claim-asserts);
  border-color: var(--claim-asserts);
}
.claim-tag--contraindicates {
  color: var(--claim-contraindicates);
  border-color: var(--claim-contraindicates);
}
.claim-tag--mixed {
  color: var(--claim-mixed);
  border-color: var(--claim-mixed);
}
.claim-tag--disputes {
  color: var(--claim-disputes);
  border-color: var(--claim-disputes);
}

/* ========== INSTRUMENT LANDSCAPE ========== */

.instrument-landscape {
  margin-top: 2em;
}
.instrument-landscape__title {
  font: 500 var(--size-small)/1.3 var(--font-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin: 0 0 14px;
}
.instrument-landscape dl {
  margin: 0;
  padding: 0;
}
.instrument-landscape dt {
  font: 500 0.95rem/1.4 var(--font-label);
  color: var(--text-primary);
  margin: 14px 0 4px;
  letter-spacing: 0.02em;
}
.instrument-landscape dt:first-child {
  margin-top: 0;
}
.instrument-landscape dd {
  margin: 0;
  font: 400 var(--size-body)/1.75 var(--font-body);
  color: var(--text-body);
}
.instrument-landscape .contraindicated {
  color: var(--claim-contraindicates);
  font-weight: 600;
}

/* ========== NAV CARDS (for index page) ========== */

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin: 2em 0;
}

.card {
  background: var(--void-raised);
  border: 1px solid var(--gold-line);
  border-radius: 6px;
  padding: 24px;
  text-decoration: none;
  color: var(--text-body);
  transition: border-color var(--dur-clinical) var(--ease-clinical),
              background var(--dur-clinical) var(--ease-clinical),
              transform var(--dur-clinical) var(--ease-clinical);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card:hover,
.card:focus-visible {
  border-color: var(--gold);
  background: var(--void-overlay);
  transform: translateY(-1px);
}
.card__eyebrow {
  font: 500 var(--size-label)/1.3 var(--font-label);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-dim);
}
.card__title {
  font: 500 var(--size-h3)/1.25 var(--font-display);
  color: var(--text-primary);
  margin: 0;
}
.card__desc {
  font: 400 var(--size-small)/1.6 var(--font-body);
  color: var(--text-body);
  margin: 0;
}
.card__arrow {
  margin-top: auto;
  color: var(--gold);
  font: 500 var(--size-label)/1 var(--font-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.card--forthcoming {
  opacity: 0.5;
  pointer-events: none;
  cursor: default;
}
.card--forthcoming:hover,
.card--forthcoming:focus-visible {
  border-color: var(--gold-line);
  background: var(--void-raised);
  transform: none;
}

/* ========== FOOTER ========== */

.site-footer {
  border-top: 1px solid var(--gold-line);
  padding: 40px var(--page-padding-x);
  margin-top: var(--section-gap);
  text-align: center;
  color: var(--text-muted);
  font: 400 var(--size-small)/1.6 var(--font-body);
}
.site-footer a {
  color: var(--text-body);
  text-decoration: none;
  transition: color var(--dur-clinical) var(--ease-clinical);
}
.site-footer a:hover { color: var(--gold); }
.site-footer__closing {
  font-style: italic;
  color: var(--text-body);
  margin: 0 0 12px;
}
.site-footer__disclaimer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font: 400 var(--size-label)/1.5 var(--font-label);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ========== SCROLL REVEAL ========== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-reveal) var(--ease-reveal),
              transform var(--dur-reveal) var(--ease-reveal);
}
.reveal[data-revealed="true"] {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ========== SEPARATOR ========== */

.separator {
  border: none;
  border-top: 1px solid var(--gold-line);
  margin: var(--section-gap) 0;
}