:root {
  --bg: #f7f8fc; --surface: #ffffff; --surface2: #f0f2f8;
  --text: #1a1d2e; --text2: #5a5f7a; --text3: #8b90a8;
  --accent: #4f6bed; --accent2: #6c5ce7; --accent-soft: #e8ecff;
  --green: #00b894; --green-soft: #e6faf5;
  --orange: #f39c12; --orange-soft: #fff8ec;
  --red: #e74c3c; --red-soft: #fde8e6;
  --purple: #a29bfe; --purple-soft: #f0eeff;
  --border: #e2e5f0; --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --radius: 12px;
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Inter',system-ui,sans-serif; background:var(--bg); color:var(--text); line-height:1.6; }
.container { max-width:1100px; margin:0 auto; padding:32px 24px; }

/* ── Header ── */
header {
  background: linear-gradient(135deg, #1a1d3a 0%, #2d1f5e 40%, #4f6bed 100%);
  padding:56px 0 48px; margin-bottom:0; position:relative; overflow:hidden;
}
header::before {
  content:''; position:absolute; inset:0;
  background:
    radial-gradient(ellipse 80% 60% at 10% 90%, rgba(108,92,231,0.35) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 20%, rgba(79,107,237,0.30) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(162,155,254,0.15) 0%, transparent 50%);
  pointer-events:none;
}
header::after {
  content:''; position:absolute; inset:0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events:none;
}
header .container { padding:0 24px; position:relative; z-index:1; }
header h1 { color:#fff; font-size:1.8rem; font-weight:700; letter-spacing:-0.5px; text-shadow:0 2px 8px rgba(0,0,0,0.3); }
header p { color:rgba(255,255,255,0.9); font-size:0.95rem; margin-top:6px; }

/* ── Nav bar ── */
nav { background:var(--surface); border-bottom:1px solid var(--border); position:sticky; top:0; z-index:100; box-shadow:0 1px 4px rgba(0,0,0,0.04); }
nav .container { display:flex; align-items:center; padding:0 16px; height:44px; }
nav .nav-links { display:flex; align-items:stretch; height:100%; flex:1; }
nav .nav-links > a { display:flex; align-items:center; padding:0 16px; text-decoration:none; color:var(--text2); font-size:0.84rem; font-weight:500; white-space:nowrap; border-bottom:2px solid transparent; transition:color 0.15s; }
nav .nav-links > a:hover,
nav .nav-links > a.active { color:var(--accent); border-bottom-color:var(--accent); }

/* ── Dropdowns ── */
.nav-dropdown { position:relative; display:flex; align-items:stretch; }
.nav-dropdown > .nav-trigger { display:flex; align-items:center; gap:5px; padding:0 16px; color:var(--text2); font-size:0.84rem; font-weight:500; white-space:nowrap; border-bottom:2px solid transparent; cursor:pointer; user-select:none; transition:color 0.15s; }
.nav-dropdown > .nav-trigger::after { content:'\25BE'; font-size:0.55rem; opacity:0.5; }
.nav-dropdown:hover > .nav-trigger { color:var(--accent); border-bottom-color:var(--accent); }
.nav-dropdown .dropdown-menu {
  display:none; position:absolute; top:100%; left:0; min-width:240px;
  background:var(--surface); border:1px solid var(--border); border-top:2px solid var(--accent);
  border-radius:0 0 var(--radius) var(--radius); box-shadow:0 8px 24px rgba(0,0,0,0.12);
  z-index:200; padding:6px 0;
}
.nav-dropdown:hover .dropdown-menu { display:block; }
.nav-dropdown .dropdown-menu a {
  display:block; padding:9px 20px; text-decoration:none; font-size:0.84rem;
  color:var(--text); font-weight:400; border-bottom:none;
}
.nav-dropdown .dropdown-menu a:hover { background:var(--accent-soft); color:var(--accent); }
.nav-dropdown .dropdown-menu a.active { color:var(--accent); font-weight:600; background:var(--accent-soft); }
.nav-dropdown .dropdown-menu .dropdown-label {
  padding:8px 20px 4px; font-size:0.68rem; font-weight:700;
  color:var(--text3); text-transform:uppercase; letter-spacing:0.5px;
}

/* ── Search ── */
.search-box { position:relative; margin-left:auto; flex-shrink:0; }
.search-box input { padding:6px 10px 6px 30px; border:1px solid var(--border); border-radius:6px; font-size:0.8rem; width:170px; background:var(--surface2); color:var(--text); outline:none; transition:all 0.2s; font-family:inherit; }
.search-box input:focus { border-color:var(--accent); box-shadow:0 0 0 3px rgba(79,107,237,0.12); width:250px; background:var(--surface); }
.search-box::before { content:'\1F50D'; position:absolute; left:8px; top:50%; transform:translateY(-50%); font-size:0.7rem; pointer-events:none; }
.search-results { position:absolute; top:100%; right:0; width:400px; max-height:400px; overflow-y:auto; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); box-shadow:0 8px 32px rgba(0,0,0,0.12); z-index:200; display:none; margin-top:4px; }
.search-results.active { display:block; }
.search-results a { display:block; padding:12px 16px; text-decoration:none; color:var(--text); border-bottom:1px solid var(--border); font-size:0.85rem; transition:background 0.15s; }
.search-results a:hover { background:var(--accent-soft); }
.search-results a .title { font-weight:600; color:var(--accent); }
.search-results a .snippet { color:var(--text2); margin-top:2px; font-size:0.8rem; }
.search-results .no-results { padding:16px; color:var(--text3); font-size:0.85rem; text-align:center; }

/* ── Badges ── */
.badge { display:inline-block; padding:3px 10px; border-radius:20px; font-size:0.72rem; font-weight:600; text-transform:uppercase; letter-spacing:0.5px; }
.badge-green { background:var(--green-soft); color:#00896e; }
.badge-orange { background:var(--orange-soft); color:#c07800; }
.badge-red { background:var(--red-soft); color:#c0392b; }
.badge-purple { background:var(--purple-soft); color:#6c5ce7; }

/* ── Cards ── */
.card { background:var(--surface); border-radius:var(--radius); padding:28px; margin-bottom:24px; box-shadow:var(--shadow); border:1px solid var(--border); overflow-x:auto; }
.card h2 { font-size:1.2rem; font-weight:600; margin-bottom:16px; color:var(--text); }
.card h3 { font-size:1rem; font-weight:600; margin:20px 0 10px; color:var(--accent2); }

/* ── Callouts ── */
.callout { padding:14px 18px; border-radius:8px; margin:16px 0; font-size:0.875rem; }
.callout-blue { background:var(--accent-soft); border-left:4px solid var(--accent); }
.callout-green { background:var(--green-soft); border-left:4px solid var(--green); }
.callout-orange { background:var(--orange-soft); border-left:4px solid var(--orange); }
.callout-red { background:var(--red-soft); border-left:4px solid var(--red); }

/* ── Tables ── */
.data-table { width:100%; border-collapse:collapse; font-size:0.875rem; }
.data-table th { text-align:left; padding:10px 12px; background:var(--surface2); border-bottom:2px solid var(--border); font-weight:600; color:var(--text2); font-size:0.8rem; text-transform:uppercase; letter-spacing:0.3px; }
.data-table td { padding:10px 12px; border-bottom:1px solid var(--border); vertical-align:top; }
.data-table tr:hover { background:var(--surface2); }
.data-table tr:nth-child(even) { background:var(--surface2); }
.data-table tr:nth-child(even):hover { background:#e6e9f2; }
.table-scroll { overflow-x:auto; margin:16px 0; border:1px solid var(--border); border-radius:var(--radius); }
.table-scroll .data-table { table-layout:auto; min-width:900px; margin:0; }

/* ── Mermaid ── */
.mermaid { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:24px; margin:16px 0; overflow-x:auto; }

/* ── Layout ── */
.grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:20px; margin-bottom:24px; }
code { background:var(--surface2); padding:2px 6px; border-radius:4px; font-size:0.85em; font-family:'Fira Code',monospace; }
footer { text-align:center; padding:32px 0; color:var(--text3); font-size:0.8rem; }

/* ── Step list ── */
.step-list { counter-reset:step; list-style:none; padding:0; }
.step-list li { counter-increment:step; padding:12px 12px 12px 52px; position:relative; border-bottom:1px solid var(--border); font-size:0.9rem; }
.step-list li:last-child { border-bottom:none; }
.step-list li::before { content:counter(step); position:absolute; left:8px; top:10px; width:30px; height:30px; border-radius:50%; background:var(--accent); color:#fff; font-size:0.8rem; font-weight:600; display:flex; align-items:center; justify-content:center; }