/* dietarysupplement.ai · Global Stylesheet
   ----------------------------------------
   Design philosophy:
   - Mobile-first
   - High legibility (16px base, 1.65 line-height)
   - Semantic palette: green = healthy/natural; navy = authority
   - Zero layout shift (all media has explicit dimensions)
   ---------------------------------------- */

:root {
  --color-primary: #0d6e6e;          /* deep teal — authority + health */
  --color-primary-dark: #075050;
  --color-primary-light: #2da3a3;
  --color-accent: #e8a838;           /* warm honey — supplement / pill */
  --color-text: #1a2330;
  --color-text-muted: #5a6473;
  --color-bg: #ffffff;
  --color-bg-soft: #f7faf9;
  --color-border: #e2e8e6;
  --color-success: #2f9d65;
  --color-warning: #d97a00;
  --color-danger: #c0392b;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, sans-serif;
  --font-serif: 'Charter', 'Iowan Old Style', 'Source Serif Pro', Georgia, serif;
  --font-mono: 'SF Mono', Menlo, Consolas, monospace;

  --content-width: 760px;
  --wide-width: 1200px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, picture, video { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.25;
  margin-top: 2.4em;
  margin-bottom: 0.7em;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); margin-top: 0.3em; }
h2 { font-size: clamp(1.55rem, 3vw, 1.95rem); padding-top: 0.5em; }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; }
p { margin: 0 0 1.2em; }
ul, ol { margin: 0 0 1.4em 1.4em; padding: 0; }
li { margin: 0.5em 0; }
strong { font-weight: 600; color: var(--color-text); }
hr { border: none; border-top: 1px solid var(--color-border); margin: 3em 0; }
blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 0.8em 1.5em;
  margin: 1.6em 0;
  background: var(--color-bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-muted);
}
code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-bg-soft);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

/* Layout */
.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.2rem;
}
.container--wide { max-width: var(--wide-width); }

/* Header / Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.2rem;
  gap: 1rem;
}
.site-logo {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.site-logo b { color: var(--color-accent); }
.site-nav {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--color-primary); text-decoration: none; }
.site-search {
  display: flex;
  align-items: center;
  background: var(--color-bg-soft);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--color-border);
  flex: 1;
  max-width: 360px;
  min-width: 0;
}
.site-search input {
  border: 0;
  background: transparent;
  outline: none;
  flex: 1;
  font: inherit;
  color: inherit;
  min-width: 0;
}

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 1.2rem 3rem;
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
}
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.4rem);
  max-width: 18ch;
  margin: 0 auto 0.6em;
}
.hero__sub {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 auto 2rem;
}
.hero__search {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  background: var(--color-bg);
  border: 2px solid var(--color-primary-light);
  border-radius: 999px;
  padding: 0.5rem 0.5rem 0.5rem 1.4rem;
  box-shadow: var(--shadow-md);
}
.hero__search input {
  flex: 1;
  border: 0;
  outline: 0;
  font-size: 1.05rem;
  background: transparent;
  min-width: 0;
}

/* Search page */
.search-lede {
  text-align: left;
  margin: 0;
}
.search-page-form {
  display: flex;
  gap: 0.75rem;
  margin: 2rem 0 1rem;
}
.search-page-form input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  font: inherit;
  color: inherit;
  background: var(--color-bg);
}
.search-page-form input:focus {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 2px;
}
.search-status {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 1rem 0;
  min-height: 1.6rem;
}
.search-results {
  display: grid;
  gap: 0.9rem;
  margin: 1.5rem 0 3rem;
}
.search-result {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.1rem;
  background: var(--color-bg);
}
.search-result:hover {
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}
.search-result h2 {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  margin: 0.15rem 0 0.3rem;
}
.search-result p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
}
.search-result small {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin-top: 0.45rem;
  overflow-wrap: anywhere;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  border: 0;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  text-decoration: none;
}
.btn--primary { background: var(--color-primary); color: white; }
.btn--primary:hover { background: var(--color-primary-dark); text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn--ghost:hover { background: var(--color-primary); color: white; text-decoration: none; }

/* Cards / grids */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card h3 { margin: 0 0 0.4em; font-size: 1.15rem; }
.card p { color: var(--color-text-muted); margin: 0; font-size: 0.95rem; }
.card__category {
  display: inline-block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 0.3em;
}

/* Feature row (homepage modules) */
.section { padding: 4rem 0; }
.section--soft { background: var(--color-bg-soft); }
.section h2 {
  text-align: center;
  margin-top: 0;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
}
.section__lede {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 auto 2.5rem;
  font-size: 1.1rem;
}

/* Article styles */
.article-header {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
}
.article-meta__author { display: flex; align-items: center; gap: 0.5rem; }
.article-meta__author img { width: 32px; height: 32px; border-radius: 50%; }
.byline-card {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.4rem;
  margin: 1.8rem 0;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}
.byline-card strong { color: var(--color-text); }

/* Evidence ribbon (used on ingredient pages) */
.evidence-grade {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}
.evidence-grade__dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--color-success);
}
.evidence-grade--strong .evidence-grade__dot { background: var(--color-success); }
.evidence-grade--moderate .evidence-grade__dot { background: var(--color-warning); }
.evidence-grade--weak .evidence-grade__dot { background: var(--color-danger); }

/* Comparison table */
.comp-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: 0.95rem;
}
.comp-table th, .comp-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.comp-table th { background: var(--color-bg-soft); font-weight: 600; }
.comp-table tr:last-child td { border-bottom: 0; }

/* TL;DR / 60-second summary box */
.summary-box {
  background: linear-gradient(135deg, #f4faf9 0%, #fef9ed 100%);
  border-left: 4px solid var(--color-accent);
  padding: 1.4rem 1.6rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 2rem 0;
}
.summary-box h3 {
  margin: 0 0 0.6em;
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  display: flex; align-items: center; gap: 0.5rem;
}
.summary-box p:last-child { margin-bottom: 0; }

/* FAQ */
.faq details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  margin-bottom: 0.8rem;
  background: var(--color-bg);
}
.faq summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text);
  outline: none;
}
.faq details[open] summary { color: var(--color-primary); margin-bottom: 0.7em; }

/* TOC */
.toc {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.6rem;
  margin: 2rem 0;
  font-size: 0.95rem;
}
.toc h4 { margin: 0 0 0.6em; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-muted); }
.toc ol { margin: 0 0 0 1.2em; }

/* Breadcrumb */
.breadcrumb {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  padding: 1rem 0 0;
  list-style: none;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.breadcrumb li::after { content: '›'; margin-left: 0.4rem; opacity: 0.5; }
.breadcrumb li:last-child::after { content: ''; }
.breadcrumb a { color: var(--color-text-muted); }

/* Disclaimer */
.disclaimer {
  background: #fef5f0;
  border: 1px solid #fadcc4;
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 2rem 0;
}

/* Footer */
.site-footer {
  background: #0d2330;
  color: #c5cfd9;
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  font-size: 0.92rem;
}
.site-footer a { color: #a3d4d4; }
.site-footer h5 { color: white; font-family: var(--font-sans); margin: 0 0 0.8em; font-size: 0.95rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 0.45em 0; }
.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 1.2rem;
}
.site-footer__bottom {
  border-top: 1px solid #2a3e4d;
  margin-top: 2rem;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Mobile */
@media (max-width: 740px) {
  .site-nav { display: none; }
  .hero { padding: 2.5rem 1rem 2rem; }
  .section { padding: 2.5rem 0; }
  .search-page-form { flex-direction: column; }
  h1 { font-size: 1.85rem; }
  h2 { font-size: 1.4rem; }
}

/* Language switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  letter-spacing: 0.02em;
}
.lang-switch a { color: var(--color-primary); text-decoration: none; }
.lang-switch a:hover { color: var(--color-primary-dark); text-decoration: underline; }
.lang-switch__active { color: var(--color-text-muted); }
.lang-switch__divider { color: var(--color-border); user-select: none; }

/* News cards with images */
.news-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

.news-card__image {
  width: 100%;
  height: 200px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  flex-shrink: 0;
}

.news-card > * {
  padding: 0 1.5rem;
}

.news-card > :first-child + * {
  padding-top: 1.5rem;
}

.news-card h3 {
  margin-top: 0.8em;
  margin-bottom: 0.4em;
}

.news-card h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.news-card h3 a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.news-card__summary {
  color: var(--color-text-muted);
  margin: 0.8em 0;
  font-size: 0.95rem;
  line-height: 1.55;
}

.news-card__meta {
  display: flex;
  gap: 0.8em;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.8em;
  padding-bottom: 1.5rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

.news-card__date,
.news-card__author {
  display: block;
}

.article-hero {
  width: 100%;
  margin: 2rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-hero img {
  width: 100%;
  height: auto;
  display: block;
}

.article-hero figcaption {
  background: var(--color-bg-soft);
  padding: 0.8rem 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.badge {
  display: inline-block;
  padding: 0.3em 0.7em;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5em;
}

.badge--research {
  background: #e3f2fd;
  color: #1565c0;
}

.badge--regulatory {
  background: #f3e5f5;
  color: #6a1b9a;
}

.badge--safety {
  background: #ffebee;
  color: #c62828;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}