/* ============================================================
   OIANS.com — SEO static page stylesheet
   Mirrors the app's Tailwind design tokens and component
   styles so prerendered pages look identical to the SPA.
   ============================================================ */

:root {
  --bg: #f7f9fc;
  --fg: #0f1729;
  --muted: #5b6b82;
  --card: #ffffff;
  --border: #e3e8f0;
  --primary: 199 89% 42%;
  --o: 199 89% 42%;
  --i: 3 74% 50%;
  --a: 152 58% 33%;
  --n: 260 52% 50%;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: hsl(var(--primary)); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ──────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: #fff;
  border-bottom: 1px solid rgba(15, 23, 41, 0.12);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}
.site-logo img { height: 56px; width: auto; display: block; }
.site-logo:hover { text-decoration: none; }

.site-nav {
  display: none;
  align-items: center;
  gap: 2px;
  margin-left: 24px;
}
@media (min-width: 1024px) { .site-nav { display: flex; } }

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover {
  background: rgba(15, 23, 41, 0.05);
  color: var(--fg);
  text-decoration: none;
}

.header-right { display: flex; align-items: center; gap: 8px; }

.sign-in-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 14px;
  height: 36px;
  border-radius: 999px;
  background: hsl(var(--primary));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.sign-in-btn:hover { text-decoration: none; opacity: 0.9; color: #fff; }

/* ── Layout containers ───────────────────────────────────── */

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}

.container-wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}

/* ── Two-column layout (muscle detail, desktop) ──────────── */

.page-layout { display: block; }
.page-main { min-width: 0; }
.page-sidebar { display: none; }

@media (min-width: 1024px) {
  .page-layout {
    display: grid;
    grid-template-columns: 1fr 296px;
    gap: 48px;
    align-items: start;
  }
  .page-sidebar {
    display: block;
    position: sticky;
    top: 80px;
  }
}

/* Image shown inline on mobile, in sidebar on desktop */
.figure-mobile { display: block; margin-bottom: 1.25rem; }
@media (min-width: 1024px) { .figure-mobile { display: none; } }

/* ── Muscle image ─────────────────────────────────────────── */

.muscle-figure { margin: 0; max-width: 100%; }
.muscle-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  border: 1px solid var(--border);
}

/* ── Sidebar card ─────────────────────────────────────────── */

.sidebar-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
  overflow: hidden;
  margin-top: 16px;
}
.sidebar-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  margin: 0;
}

/* ── Breadcrumb ───────────────────────────────────────────── */

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin: 14px 0 8px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--fg); text-decoration: none; }
.breadcrumb .sep { opacity: 0.5; margin: 0 2px; }
.breadcrumb [aria-current="page"] { color: var(--fg); font-weight: 600; }

/* ── Typography ───────────────────────────────────────────── */

h1 {
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 10px 0 4px;
}

.subhead {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
  margin: 0 0 16px;
}

.overview {
  font-size: 16px;
  line-height: 1.7;
  margin: 0 0 8px;
  color: var(--fg);
}

section { margin: 28px 0; }

.section-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.section-title .count {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  margin-left: 4px;
}
.section-title a { color: var(--fg); }
.section-title a:hover { color: hsl(var(--primary)); text-decoration: none; }

/* ── OIANS Pillar cards ───────────────────────────────────── */

.pillars {
  display: grid;
  gap: 10px;
}
@media (min-width: 560px) { .pillars { grid-template-columns: 1fr 1fr; } }

.pillar {
  border: 1px solid;
  border-radius: 12px;
  padding: 14px 16px;
}
.pillar h2 {
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 700;
  margin: 0 0 6px;
}
.pillar p { margin: 0; font-size: 15px; color: var(--fg); }

.pillar.o { background: hsl(var(--o) / 0.08); border-color: hsl(var(--o) / 0.3); }
.pillar.o h2 { color: hsl(var(--o)); }
.pillar.i { background: hsl(var(--i) / 0.08); border-color: hsl(var(--i) / 0.3); }
.pillar.i h2 { color: hsl(var(--i)); }
.pillar.a { background: hsl(var(--a) / 0.08); border-color: hsl(var(--a) / 0.3); }
.pillar.a h2 { color: hsl(var(--a)); }
.pillar.n { background: hsl(var(--n) / 0.08); border-color: hsl(var(--n) / 0.3); }
.pillar.n h2 { color: hsl(var(--n)); }

/* ── Long-form content sections ───────────────────────────── */

.attach {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
}
@media (min-width: 560px) { .attach { grid-template-columns: 1fr 1fr; } }

.attach-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}
.attach-item h3 {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.attach-item p { margin: 0; color: var(--fg); }

/* ── Quick facts table ────────────────────────────────────── */

.facts {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--card);
}
.facts .fact {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--border);
}
.facts .fact:first-child { border-top: 0; }
.facts dt { font-weight: 600; color: var(--muted); font-size: 0.85rem; }
.facts dd { margin: 0; color: var(--fg); }

/* ── FAQ ──────────────────────────────────────────────────── */

.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  padding: 14px 16px;
  margin-bottom: 10px;
}
.faq-item h3 { margin: 0 0 6px; font-size: 16px; }
.faq-item p { margin: 0; color: var(--fg); }

/* ── Related muscles ──────────────────────────────────────── */

.related { display: flex; flex-wrap: wrap; gap: 8px; }
.related a {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 999px;
  padding: 6px 13px;
  font-size: 14px;
  color: var(--fg);
}
.related a:hover {
  border-color: hsl(var(--primary));
  color: hsl(var(--primary));
  text-decoration: none;
}

/* ── CTA block ────────────────────────────────────────────── */

.cta {
  background: linear-gradient(135deg, hsl(var(--primary) / 0.08), hsl(var(--n) / 0.06));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
}
.cta p { margin: 0 0 10px; }
.cta-note { font-size: 13px; color: var(--muted); margin-top: 12px !important; }

.btn {
  display: inline-block;
  background: hsl(var(--primary));
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  margin: 4px 8px 0 0;
}
.btn:hover { text-decoration: none; opacity: 0.92; color: #fff; }
.btn.secondary { background: transparent; border: 1px solid var(--border); color: var(--fg); }

/* ── Hub / Library page ───────────────────────────────────── */

/* Sticky header bar (mirrors MuscleLibrary top bar) */
.hub-header {
  background: rgba(247, 249, 252, 0.95);
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
  margin: -24px -16px 24px;
  position: sticky;
  top: 64px;
  z-index: 30;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.hub-header h1 {
  font-size: clamp(20px, 4vw, 26px);
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hub-header p { margin: 0; font-size: 14px; color: var(--muted); }

/* Region blocks */
.region-block { margin: 32px 0; }

/* Two-column grid for groups within a region (≥ 640px) */
.region-groups-grid { display: block; }
@media (min-width: 640px) {
  .region-groups-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: start;
  }
}

/* Group heading */
.hub-group { margin: 0 0 16px; }
.hub-group:last-child { margin-bottom: 0; }
.hub-group h3 {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
  margin: 0 0 8px;
  padding: 0 4px;
}

/* Card-style list (mirrors MuscleLibrary <ul> cards) */
.hub-list-card {
  list-style: none;
  padding: 0;
  margin: 0;
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.hub-list-card li + li { border-top: 1px solid var(--border); }
.hub-list-card a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 16px;
  background: var(--card);
  color: var(--fg);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.12s;
}
.hub-list-card a:hover {
  background: rgba(15, 23, 41, 0.03);
  text-decoration: none;
  color: var(--fg);
}
.hub-chev { color: var(--muted); flex-shrink: 0; font-size: 18px; line-height: 1; }

/* ── Footer ───────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.4);
  padding: 24px 20px 96px;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  margin: 0 0 16px;
}
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: hsl(var(--primary));
}
.footer-link:hover { text-decoration: underline; }
.footer-copyright { font-size: 12px; color: var(--muted); }