:root{
  --bg:#f4f6fb;--surface:#ffffff;--surface-2:#f8fafc;--text:#0b1e3f;--muted:#5b6b85;
  --primary:#0b1e3f;--primary-2:#12306a;--accent:#00b8d9;--accent-2:#22d3ee;
  --border:#e3e8f0;--shadow:0 10px 30px -12px rgba(11,30,63,.18);
  --gradient:linear-gradient(135deg,#0b1e3f 0%,#12306a 55%,#0891b2 100%);
}
[data-theme="dark"]{
  --bg:#070d1c;--surface:#0f1a33;--surface-2:#0b1428;--text:#e8eefc;--muted:#94a3c4;
  --primary:#0b1e3f;--primary-2:#1e40af;--accent:#22d3ee;--accent-2:#67e8f9;
  --border:#1e2a4a;--shadow:0 10px 30px -12px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html,body{background:var(--bg);color:var(--text);font-family:'Inter','Segoe UI',system-ui,sans-serif;scroll-behavior:smooth}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-2)}
.saytu-layout{display:flex;min-height:100vh}
.sidebar{width:270px;background:var(--gradient);color:#fff;padding:1.5rem 1rem;position:sticky;top:0;height:100vh;overflow-y:auto;flex-shrink:0}
.sidebar .brand{display:flex;align-items:center;gap:.6rem;margin-bottom:1.5rem}
.sidebar .brand-mark{width:42px;height:42px;border-radius:10px;background:rgba(255,255,255,.12);display:grid;place-items:center;font-weight:800;color:#fff;border:1px solid rgba(255,255,255,.2)}
.sidebar h1{font-size:1.15rem;margin:0;font-weight:800;letter-spacing:.5px}
.sidebar small{color:#a5c8ff;font-size:.72rem;letter-spacing:1px;text-transform:uppercase}
.sidebar .nav-section{color:#a5c8ff;font-size:.7rem;letter-spacing:1.2px;text-transform:uppercase;padding:1rem .5rem .4rem}
.sidebar .nav-link{color:#dbe6ff;border-radius:8px;padding:.55rem .75rem;font-size:.9rem;display:flex;align-items:center;gap:.6rem}
.sidebar .nav-link:hover{background:rgba(255,255,255,.08);color:#fff}
.sidebar .nav-link.active{background:rgba(34,211,238,.18);color:#fff;font-weight:600}
.sidebar .nav-link i{width:18px;text-align:center;opacity:.85}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:.9rem 1.5rem;display:flex;align-items:center;gap:1rem;position:sticky;top:0;z-index:20}
.topbar .search{flex:1;max-width:520px;position:relative}
.topbar .search input{width:100%;padding:.55rem 1rem .55rem 2.2rem;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);color:var(--text)}
.topbar .search i{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--muted)}
.topbar .btn-icon{background:var(--surface-2);border:1px solid var(--border);color:var(--text);width:40px;height:40px;border-radius:10px;display:grid;place-items:center;cursor:pointer;transition:.2s}
.topbar .btn-icon:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.content{padding:2rem 2rem 4rem;max-width:1400px;width:100%;margin:0 auto}
.page-hero{background:var(--gradient);color:#fff;border-radius:20px;padding:2.5rem;margin-bottom:2rem;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.page-hero::after{content:"";position:absolute;right:-80px;top:-80px;width:300px;height:300px;background:radial-gradient(circle,rgba(34,211,238,.35),transparent 70%);border-radius:50%}
.page-hero h1{font-weight:800;font-size:2.2rem;margin:0 0 .5rem;position:relative;z-index:1}
.page-hero p{color:#cfe6ff;font-size:1.05rem;max-width:820px;margin:0;position:relative;z-index:1}
.page-hero .eyebrow{display:inline-block;padding:.3rem .8rem;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);border-radius:999px;font-size:.75rem;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:1rem}
.card-x{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.5rem;box-shadow:var(--shadow);height:100%;transition:.25s}
.card-x:hover{transform:translateY(-4px);border-color:var(--accent)}
.card-x .icon{width:50px;height:50px;border-radius:12px;background:linear-gradient(135deg,var(--primary-2),var(--accent));color:#fff;display:grid;place-items:center;font-size:1.3rem;margin-bottom:1rem}
.card-x h3{font-size:1.1rem;font-weight:700;margin:0 0 .5rem}
.card-x p{color:var(--muted);font-size:.92rem;margin:0}
.section-title{font-weight:800;font-size:1.5rem;margin:2.5rem 0 1.25rem;color:var(--text);display:flex;align-items:center;gap:.6rem}
.section-title::before{content:"";width:4px;height:24px;background:var(--accent);border-radius:2px}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.5rem;text-align:center;box-shadow:var(--shadow)}
.stat-card .num{font-size:2.2rem;font-weight:800;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-card .lbl{color:var(--muted);font-size:.85rem;text-transform:uppercase;letter-spacing:1px}
.diagram-box{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.5rem;box-shadow:var(--shadow);overflow-x:auto}
.diagram-box .mermaid{text-align:center}
table.table-x{width:100%;background:var(--surface);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
table.table-x th{background:var(--primary);color:#fff;padding:.9rem;font-weight:600;font-size:.85rem;text-transform:uppercase;letter-spacing:.5px}
table.table-x td{padding:.85rem;border-top:1px solid var(--border);color:var(--text)}
table.table-x tr:hover td{background:var(--surface-2)}
.badge-x{display:inline-block;padding:.25rem .7rem;border-radius:999px;font-size:.75rem;font-weight:600;background:rgba(0,184,217,.15);color:var(--accent)}
.badge-x.green{background:rgba(34,197,94,.15);color:#16a34a}
.badge-x.red{background:rgba(239,68,68,.15);color:#dc2626}
.badge-x.orange{background:rgba(249,115,22,.15);color:#ea580c}
.workflow{display:flex;flex-direction:column;gap:.75rem;position:relative}
.workflow-step{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:12px;padding:1rem 1.25rem;box-shadow:var(--shadow);display:flex;align-items:center;gap:1rem;transition:.2s;cursor:pointer}
.workflow-step:hover{transform:translateX(6px);border-left-color:var(--primary-2)}
.workflow-step .num{width:36px;height:36px;border-radius:50%;background:var(--gradient);color:#fff;display:grid;place-items:center;font-weight:700;flex-shrink:0}
.workflow-step h4{margin:0;font-size:1rem;font-weight:700}
.workflow-step p{margin:.15rem 0 0;color:var(--muted);font-size:.85rem}
.timeline{position:relative;padding-left:2rem}
.timeline::before{content:"";position:absolute;left:.5rem;top:0;bottom:0;width:2px;background:linear-gradient(var(--accent),var(--primary-2))}
.timeline-item{position:relative;padding:1rem 0 1.5rem}
.timeline-item::before{content:"";position:absolute;left:-1.75rem;top:1.3rem;width:14px;height:14px;border-radius:50%;background:var(--accent);border:3px solid var(--surface);box-shadow:0 0 0 2px var(--accent)}
.timeline-item h4{margin:0;font-weight:700}
.timeline-item .date{color:var(--accent);font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:1px}
.code-box{background:#0b1428;color:#e8eefc;border-radius:12px;padding:1.25rem;font-family:'Fira Code',monospace;font-size:.85rem;overflow-x:auto;border:1px solid var(--border)}
.code-box .k{color:#22d3ee}.code-box .s{color:#a5f3fc}.code-box .c{color:#64748b}
.print-btn{position:fixed;bottom:24px;right:24px;width:52px;height:52px;border-radius:50%;background:var(--gradient);color:#fff;border:none;box-shadow:var(--shadow);display:grid;place-items:center;font-size:1.2rem;z-index:100;cursor:pointer;transition:.2s}
.print-btn:hover{transform:scale(1.1)}
@media print{
  .sidebar,.topbar,.print-btn{display:none!important}
  .content{padding:0;max-width:100%}
  .page-hero{background:#0b1e3f!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .card-x,.diagram-box{break-inside:avoid;box-shadow:none;border:1px solid #ccc}
}
@media (max-width:991px){
  .sidebar{position:fixed;left:-280px;z-index:1000;transition:left .3s}
  .sidebar.open{left:0}
  .content{padding:1.25rem}
  .page-hero{padding:1.75rem}
  .page-hero h1{font-size:1.6rem}
}
.mobile-menu-btn{display:none;background:var(--surface-2);border:1px solid var(--border);color:var(--text);width:40px;height:40px;border-radius:10px}
@media (max-width:991px){.mobile-menu-btn{display:grid;place-items:center}}

.stat-card .stat-icon{width:48px;height:48px;margin:0 auto .6rem;display:flex;align-items:center;justify-content:center;border-radius:12px;background:var(--gradient);color:#fff;font-size:1.15rem;box-shadow:var(--shadow)}
.api-tabs{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1rem}.api-tabs button{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:.5rem .9rem;border-radius:10px;font-size:.85rem;cursor:pointer;font-weight:600}.api-tabs button.active{background:var(--gradient);color:#fff;border-color:transparent}
.table-x.gantt td{padding:.4rem;text-align:center}.table-x.gantt td.g{border-radius:6px}.table-x.gantt td.g1{background:#0891b2}.table-x.gantt td.g2{background:#12306a;color:#fff}.table-x.gantt td.g3{background:#7c3aed}.table-x.gantt td.g4{background:#059669}