/* ═══════════════════════════════════════════════════════════════════
   UCSF BioRouter — Shared Stylesheet
   Design: Material Design + OpenAI aesthetics, light warm theme
   Colors from BioRouter app (main.css): warm cream + coral accent
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Reset & Design Tokens ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  /* Light warm background — anchored on BioRouter's neutral palette */
  --bg:          #ffffff;
  --bg-2:        #fcf8ed;     /* neutral-50  warm cream */
  --bg-3:        #f8f2df;     /* neutral-100 warm beige */
  --bg-4:        #ece5cf;     /* neutral-200 warm tan  */
  --border:      rgba(0,0,0,0.08);
  --border-2:    rgba(0,0,0,0.16);
  /* Warm dark text */
  --text:        #2a2520;
  --text-2:      #7a736c;
  --text-3:      #b6ae93;
  /* Coral/orange accent — from BioRouter's --color-block-teal: #cf6d47 */
  --accent:      #cf6d47;
  --accent-light:#e07a52;
  --accent-dim:  rgba(207,109,71,0.10);
  --accent-dim2: rgba(207,109,71,0.18);
  /* UCSF Navy */
  --ucsf:        #052049;
  --radius:      12px;
  --radius-lg:   18px;
  --radius-xl:   24px;
  --shadow:      0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg:   0 12px 48px rgba(0,0,0,0.12);
  --transition:  0.22s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── Scrollbar ──────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb { background: var(--bg-4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #d7cfb6; }

/* ─── Navigation ─────────────────────────────────────────────────── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text);
  flex-shrink: 0;
}
.nav-logo { width: 28px; height: 28px; border-radius: 6px; }
.nav-title { font-size: 15px; font-weight: 600; letter-spacing: -0.3px; }
.nav-tabs {
  display: flex; align-items: center; gap: 2px;
  list-style: none;
}
.nav-tabs li a {
  display: block; padding: 6px 14px;
  color: var(--text-2); text-decoration: none;
  font-size: 14px; font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
}
.nav-tabs li a:hover { color: var(--text); background: var(--bg-3); }
.nav-tabs li a.active { color: var(--accent); background: var(--accent-dim); }
.nav-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.nav-gh-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 8px;
  background: var(--bg-3); border: 1px solid var(--border-2);
  color: var(--text-2); text-decoration: none;
  font-size: 13px; font-weight: 500;
  transition: var(--transition);
}
.nav-gh-btn:hover { color: var(--text); border-color: var(--accent); }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.hamburger span { width: 22px; height: 2px; background: var(--text-2); border-radius: 2px; transition: var(--transition); }
.mobile-menu {
  display: none; position: fixed; top: 60px; left: 0; right: 0; z-index: 99;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  flex-direction: column; gap: 4px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 10px 14px; border-radius: 8px;
  color: var(--text-2); text-decoration: none;
  font-size: 15px; font-weight: 500;
  transition: var(--transition);
}
.mobile-menu a:hover, .mobile-menu a.active { color: var(--accent); background: var(--accent-dim); }

/* ─── Page wrapper ───────────────────────────────────────────────── */
.page { padding-top: 60px; min-height: 100vh; }

/* ─── Buttons ────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius);
  background: var(--accent); color: #fff;
  font-size: 15px; font-weight: 600;
  text-decoration: none; border: none; cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(207,109,71,0.28);
}
.btn-primary:hover { background: var(--accent-light); box-shadow: 0 6px 24px rgba(207,109,71,0.42); transform: translateY(-1px); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius);
  background: transparent; color: var(--text);
  font-size: 15px; font-weight: 500;
  text-decoration: none; border: 1px solid var(--border-2); cursor: pointer;
  transition: var(--transition);
}
.btn-secondary:hover { background: var(--bg-3); border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* ─── Section label ──────────────────────────────────────────────── */
.section-label { text-align: center; margin-bottom: 48px; }
.section-label .eyebrow {
  font-size: 11px; font-weight: 600; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.section-label h2 { font-size: clamp(24px, 4vw, 36px); font-weight: 700; letter-spacing: -1px; }
.section-label p { color: var(--text-2); margin-top: 10px; max-width: 500px; margin-left: auto; margin-right: auto; }

/* ─── Cards ──────────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.feature-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--accent);
  background: var(--bg-3);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(207,109,71,0.10);
}
.feature-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--accent-dim);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 16px;
  border: 1px solid rgba(207,109,71,0.2);
}
.feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-2); line-height: 1.6; }

/* ─── Info / alert boxes ─────────────────────────────────────────── */
.info-box {
  background: var(--bg-2); border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 20px 24px;
}
.info-box h4 { font-size: 14px; font-weight: 600; color: var(--accent); margin-bottom: 8px; }
.info-box p { font-size: 14px; color: var(--text-2); line-height: 1.6; }
.info-box a { color: var(--accent); text-decoration: none; }
.info-box a:hover { text-decoration: underline; }
.alert {
  padding: 14px 18px; border-radius: var(--radius);
  margin: 16px 0; font-size: 14px; line-height: 1.6;
}
.alert-warning { background: rgba(250,160,30,0.06); border: 1px solid rgba(250,160,30,0.2); color: #b87a10; }
.alert-info { background: var(--accent-dim); border: 1px solid rgba(207,109,71,0.2); color: var(--accent); }
.alert strong { color: inherit; }

/* ─── Code ───────────────────────────────────────────────────────── */
pre, .code-block {
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 20px;
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 13px; color: #443c2a;
  overflow-x: auto; margin: 16px 0;
  line-height: 1.6;
}
code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  background: var(--bg-3); padding: 2px 6px;
  border-radius: 4px; color: var(--accent);
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* ─── Tables ─────────────────────────────────────────────────────── */
.doc-table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.doc-table th {
  text-align: left; padding: 10px 14px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
  text-transform: uppercase; color: var(--text-3);
  background: var(--bg-2); border-bottom: 1px solid var(--border);
}
.doc-table td {
  padding: 10px 14px; font-size: 14px; color: var(--text-2);
  border-bottom: 1px solid var(--border); vertical-align: middle;
}
.doc-table tr:last-child td { border-bottom: none; }
.doc-table tr:hover td { background: rgba(0,0,0,0.02); }
.doc-table a { color: var(--accent); text-decoration: none; }
.doc-table a:hover { text-decoration: underline; }

/* ─── Doc page typography ────────────────────────────────────────── */
.doc-page h1 { font-size: 32px; font-weight: 700; letter-spacing: -1px; margin-bottom: 8px; }
.doc-page .doc-intro { font-size: 16px; color: var(--text-2); margin-bottom: 40px; padding-bottom: 32px; border-bottom: 1px solid var(--border); }
.doc-page h2 { font-size: 20px; font-weight: 600; letter-spacing: -0.5px; margin: 36px 0 16px; }
.doc-page h3 { font-size: 16px; font-weight: 600; margin: 24px 0 12px; }
.doc-page p { font-size: 15px; color: var(--text-2); line-height: 1.7; margin-bottom: 16px; }
.doc-page ul, .doc-page ol { padding-left: 24px; margin-bottom: 16px; }
.doc-page li { font-size: 15px; color: var(--text-2); line-height: 1.7; margin-bottom: 6px; }
.doc-page a { color: var(--accent); text-decoration: none; }
.doc-page a:hover { text-decoration: underline; }
.doc-page strong { color: var(--text); font-weight: 600; }

/* ─── Step cards ─────────────────────────────────────────────────── */
.step-card {
  display: flex; gap: 16px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  margin-bottom: 16px;
}
.step-num {
  flex-shrink: 0; width: 32px; height: 32px;
  border-radius: 50%; background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; color: #fff;
}
.step-content h3 { margin-top: 4px; margin-bottom: 8px; font-size: 16px; font-weight: 600; }
.step-content p { font-size: 14px; color: var(--text-2); line-height: 1.6; margin-bottom: 8px; }
.step-content ul { padding-left: 20px; }
.step-content li { font-size: 14px; color: var(--text-2); line-height: 1.7; margin-bottom: 4px; }
.step-content a { color: var(--accent); text-decoration: none; }
.step-content a:hover { text-decoration: underline; }
.step-content strong { color: var(--text); font-weight: 600; }

/* ─── Provider chips ─────────────────────────────────────────────── */
.provider-grid { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 32px; }
.provider-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: 100px;
  background: var(--bg-3); border: 1px solid var(--border);
  font-size: 13px; font-weight: 500; color: var(--text-2);
  transition: var(--transition);
}
.provider-chip:hover { border-color: var(--accent); color: var(--text); }
.provider-chip.highlight { border-color: rgba(207,109,71,0.4); color: var(--accent); background: var(--accent-dim); }

/* ─── Divider ────────────────────────────────────────────────────── */
.h-rule { height: 1px; background: var(--border); margin: 48px 0; }

/* ─── Tags ───────────────────────────────────────────────────────── */
.tag {
  padding: 3px 10px; border-radius: 100px;
  font-size: 11px; font-weight: 600;
  background: var(--bg-4); color: var(--text-3);
  border: 1px solid var(--border);
}
.tag.ucsf { background: rgba(5,32,73,0.06); color: #052049; border-color: rgba(5,32,73,0.15); }
.tag.mcp { background: rgba(207,109,71,0.10); color: var(--accent); border-color: rgba(207,109,71,0.2); }
.tag.federated { background: rgba(5,32,73,0.06); color: #052049; border-color: rgba(5,32,73,0.15); font-weight: 700; }

/* ─── Footer ─────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-3);
  font-size: 13px;
}
footer a { color: var(--text-3); text-decoration: none; }
footer a:hover { color: var(--accent); }
footer p + p { margin-top: 6px; }

/* ─── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-tabs, .nav-right { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 480px) {
  .card-grid { grid-template-columns: 1fr; }
  .step-card { flex-direction: column; }
}

/* ─── Animations ─────────────────────────────────────────────────── */
@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.08); }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.4s ease forwards; }