/* ───────────────────────────────────────────────────────────────
   UCSF BioRouter — Shared Stylesheet
   Mirrors the BioRouter desktop app: warm cream surface,
   flat coral buttons, monochrome silhouette icons, low-chrome
   sectioned layouts.
   ─────────────────────────────────────────────────────────────── */

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

:root {
  /* Surfaces — match the BioRouter Electron app */
  --bg:          #faf8f3;   /* neutral-50, the sidebar/app surface */
  --bg-2:        #ffffff;   /* card / panel */
  --bg-3:        #f4f0e6;   /* neutral-100, medium hover */
  --bg-4:        #ece5cf;   /* neutral-200, strong */
  --border:      rgba(40,30,15,0.07);
  --border-2:    rgba(40,30,15,0.12);

  /* Text */
  --text:        #2a2520;
  --text-2:      #7a736c;
  --text-3:      #b6ae93;
  --text-on-accent: #ffffff;

  /* Coral accent (block-teal from the app) */
  --accent:      #cf6d47;
  --accent-hover:#ba6240;
  --accent-soft: rgba(207,109,71,0.10);
  --accent-soft2:rgba(207,109,71,0.18);

  /* UCSF navy */
  --ucsf:        #052049;
  --ucsf-hover:  #083570;

  /* Shape */
  --radius:      6px;       /* buttons, inputs (matches app rounded-md) */
  --radius-lg:   12px;
  --radius-xl:   16px;      /* cards, dialogs (matches app rounded-xl) */

  /* Shadow — soft, app-style */
  --shadow:      0 1px 3px rgba(0,0,0,0.06), 0 0 1px rgba(0,0,0,0.12);
  --shadow-lg:   0 8px 24px rgba(32,25,15,0.10), 0 0 1px rgba(0,0,0,0.15);

  /* Motion */
  --transition:  0.15s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: Arial, 'Helvetica Neue', Helvetica, -apple-system, BlinkMacSystemFont, 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; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #c9bfa6; }

/* ─── Navigation ─────────────────────────────────────────────── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(250,248,243,0.88);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between;
  height: 58px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text);
  flex-shrink: 0;
}
.nav-logo { width: 26px; height: 26px; border-radius: 6px; }
.nav-title { font-size: 14px; font-weight: 700; letter-spacing: -0.2px; }
.nav-tabs { display: flex; align-items: center; gap: 2px; list-style: none; }
.nav-tabs li a {
  display: block; padding: 6px 12px;
  color: var(--text-2); text-decoration: none;
  font-size: 13px; font-weight: 600;
  border-radius: var(--radius);
  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-soft); }
.nav-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.nav-gh-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: var(--radius);
  background: var(--bg-3); color: var(--text-2);
  text-decoration: none;
  font-size: 13px; font-weight: 600;
  transition: var(--transition);
}
.nav-gh-btn:hover { background: var(--bg-4); color: var(--text); }
.nav-gh-btn:active { transform: translateY(1px); }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.hamburger span { width: 20px; height: 2px; background: var(--text-2); border-radius: 2px; transition: var(--transition); }
.mobile-menu {
  display: none; position: fixed; top: 58px; left: 0; right: 0; z-index: 99;
  background: rgba(250,248,243,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  flex-direction: column; gap: 2px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 10px 14px; border-radius: var(--radius);
  color: var(--text-2); text-decoration: none;
  font-size: 14px; font-weight: 600;
  transition: var(--transition);
}
.mobile-menu a:hover, .mobile-menu a.active { color: var(--accent); background: var(--accent-soft); }

/* ─── Page wrapper ───────────────────────────────────────────── */
.page { padding-top: 58px; min-height: 100vh; }

/* ─── Buttons — flat, app-style ──────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px; border-radius: var(--radius);
  background: var(--accent); color: var(--text-on-accent);
  font-family: inherit; font-size: 14px; font-weight: 600;
  text-decoration: none; border: none; cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: translateY(1px); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px; border-radius: var(--radius);
  background: var(--bg-3); color: var(--text);
  font-family: inherit; font-size: 14px; font-weight: 600;
  text-decoration: none; border: none; cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.btn-secondary:hover { background: var(--bg-4); }
.btn-secondary:active { transform: translateY(1px); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: var(--radius);
  background: transparent; color: var(--text-2);
  font-family: inherit; font-size: 13px; font-weight: 600;
  text-decoration: none; border: none; cursor: pointer;
  transition: var(--transition);
}
.btn-ghost:hover { background: var(--bg-3); color: var(--text); }
.btn-ghost:active { transform: translateY(1px); }

.btn-sm { padding: 7px 14px; font-size: 12.5px; }

/* ─── Icon utility ───────────────────────────────────────────── */
.icon {
  width: 20px; height: 20px;
  stroke: currentColor; fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}
.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 28px; height: 28px; }

/* Icon "tile" — flat silhouette square */
.icon-tile {
  width: 40px; height: 40px;
  border-radius: var(--radius-lg);
  background: var(--bg-3);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.icon-tile .icon { width: 22px; height: 22px; }
.icon-tile-sm { width: 32px; height: 32px; border-radius: 8px; }
.icon-tile-sm .icon { width: 18px; height: 18px; }

/* ─── Section header ─────────────────────────────────────────── */
.section-label { text-align: center; margin-bottom: 48px; }
.section-label .eyebrow {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: 1.6px;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 12px;
}
.section-label h2 {
  font-size: clamp(22px, 3.4vw, 32px); font-weight: 700;
  letter-spacing: -0.6px; line-height: 1.2;
  color: var(--text);
}
.section-label p {
  color: var(--text-2); margin-top: 12px;
  max-width: 540px; margin-left: auto; margin-right: auto;
  font-size: 15px; line-height: 1.65;
}

/* ─── Section row (flat, no border) ──────────────────────────── */
.section-rows { display: flex; flex-direction: column; }
.section-row {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.section-row:last-child { border-bottom: none; }
.section-row .icon-tile { margin-top: 2px; }
.section-row-body h3 {
  font-size: 16px; font-weight: 700; margin-bottom: 6px;
  letter-spacing: -0.1px;
}
.section-row-body p { font-size: 14px; color: var(--text-2); line-height: 1.65; }

/* ─── Feature tiles (flat, card-light) ───────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 4px;
  background: var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.feature-tile {
  background: var(--bg-2);
  padding: 24px 26px;
  display: flex; flex-direction: column; gap: 12px;
  transition: background var(--transition);
}
.feature-tile:hover { background: var(--bg-3); }
.feature-tile h3 { font-size: 15px; font-weight: 700; letter-spacing: -0.1px; }
.feature-tile p { font-size: 13.5px; color: var(--text-2); line-height: 1.65; }

/* ─── Surface card (flat, soft shadow, no border) ────────────── */
.surface {
  background: var(--bg-2);
  border-radius: var(--radius-xl);
  padding: 24px 26px;
  box-shadow: var(--shadow);
}

/* ─── Info / alert ───────────────────────────────────────────── */
.info-box {
  background: var(--bg-2);
  border-radius: var(--radius-lg); padding: 16px 20px;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--accent);
}
.info-box h4 { font-size: 13px; font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.info-box p { font-size: 14px; color: var(--text-2); line-height: 1.65; }
.info-box a { color: var(--accent); text-decoration: none; }
.info-box a:hover { text-decoration: underline; }

.alert {
  padding: 12px 16px; border-radius: var(--radius-lg);
  margin: 14px 0; font-size: 14px; line-height: 1.6;
}
.alert-warning { background: rgba(250,160,30,0.07); color: #a97010; }
.alert-info { background: var(--accent-soft); color: var(--accent); }
.alert strong { color: inherit; }

/* ─── Code ───────────────────────────────────────────────────── */
pre, .code-block {
  background: var(--bg-3);
  border-radius: var(--radius-lg); padding: 14px 18px;
  font-family: 'Menlo', 'Consolas', 'Courier New', monospace;
  font-size: 13px; color: #3a3020;
  overflow-x: auto; margin: 14px 0;
  line-height: 1.65;
}
code {
  font-family: 'Menlo', 'Consolas', 'Courier New', monospace;
  font-size: 12.5px;
  background: var(--bg-3); padding: 2px 6px;
  border-radius: 4px; color: #b85c35;
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* ─── Tables ─────────────────────────────────────────────────── */
.doc-table {
  width: 100%; border-collapse: collapse; margin: 14px 0;
  background: var(--bg-2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.doc-table th {
  text-align: left; padding: 11px 16px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.8px;
  text-transform: uppercase; color: var(--text-3);
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
}
.doc-table td {
  padding: 11px 16px; 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: var(--bg-3); }
.doc-table a { color: var(--accent); text-decoration: none; }
.doc-table a:hover { text-decoration: underline; }

/* ─── Doc page typography ────────────────────────────────────── */
.doc-page h1 { font-size: 30px; font-weight: 700; letter-spacing: -0.8px; margin-bottom: 8px; }
.doc-page .doc-intro {
  font-size: 15px; color: var(--text-2);
  margin-bottom: 36px; padding-bottom: 28px;
  border-bottom: 1px solid var(--border); line-height: 1.65;
}
.doc-page h2 { font-size: 19px; font-weight: 700; letter-spacing: -0.4px; margin: 32px 0 14px; }
.doc-page h3 { font-size: 15px; font-weight: 700; margin: 22px 0 10px; }
.doc-page p { font-size: 14px; color: var(--text-2); line-height: 1.7; margin-bottom: 14px; }
.doc-page ul, .doc-page ol { padding-left: 22px; margin-bottom: 14px; }
.doc-page li { font-size: 14px; color: var(--text-2); line-height: 1.7; margin-bottom: 5px; }
.doc-page a { color: var(--accent); text-decoration: none; }
.doc-page a:hover { text-decoration: underline; }
.doc-page strong { color: var(--text); font-weight: 700; }

/* ─── Step row (no card) ─────────────────────────────────────── */
.step-row {
  display: flex; gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.step-row:last-child { border-bottom: none; }
.step-num {
  flex-shrink: 0; width: 28px; height: 28px;
  border-radius: 50%; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.step-body h3 { margin-top: 2px; margin-bottom: 6px; font-size: 15px; font-weight: 700; }
.step-body p { font-size: 13.5px; color: var(--text-2); line-height: 1.65; margin-bottom: 8px; }
.step-body ul { padding-left: 18px; }
.step-body li { font-size: 13.5px; color: var(--text-2); line-height: 1.7; margin-bottom: 3px; }
.step-body a { color: var(--accent); text-decoration: none; }
.step-body a:hover { text-decoration: underline; }
.step-body strong { color: var(--text); font-weight: 700; }

/* ─── Provider chips — flat ──────────────────────────────────── */
.provider-grid { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 28px; }
.provider-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px; border-radius: var(--radius);
  background: var(--bg-3); color: var(--text-2);
  font-size: 13px; font-weight: 600;
  transition: var(--transition);
}
.provider-chip:hover { background: var(--bg-4); color: var(--text); }
.provider-chip.highlight {
  background: var(--accent-soft); color: var(--accent);
}
.provider-chip.highlight:hover { background: var(--accent-soft2); }
.provider-chip .icon { width: 14px; height: 14px; opacity: 0.85; }

/* ─── .brxt download chip ────────────────────────────────────── */
/* Matches the .skill-dl-btn style so brxt, .zip, and workflow download
   buttons share a unified accent-soft look. */
.brxt-chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 12px; border-radius: var(--radius);
  background: var(--accent-soft); color: var(--accent);
  text-decoration: none; font-size: 11.5px; font-weight: 700;
  white-space: nowrap;
  transition: var(--transition);
}
.brxt-chip:hover { background: var(--accent); color: #fff; }
.brxt-chip:active { transform: translateY(1px); }

/* ─── Divider ────────────────────────────────────────────────── */
.h-rule { height: 1px; background: var(--border); margin: 44px 0; }

/* ─── Tags ───────────────────────────────────────────────────── */
.tag {
  padding: 3px 9px; border-radius: var(--radius);
  font-size: 10.5px; font-weight: 600;
  background: var(--bg-3); color: var(--text-2);
  letter-spacing: 0.2px;
}
.tag.ucsf { background: rgba(5,32,73,0.07); color: var(--ucsf); }
.tag.mcp { background: var(--accent-soft); color: var(--accent); }
.tag.federated { background: rgba(5,32,73,0.07); color: var(--ucsf); }

/* ─── Footer ─────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 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: 5px; }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-tabs, .nav-right { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr; }
  .step-row { flex-direction: column; gap: 10px; }
}

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.38s ease forwards; }