:root{
  --accent:#0ea5c9;
  --accent-dark:#0891b2;
  --accent-light:#ecfeff;
  --navy:#0f172a;
  --text:#1e293b;
  --text-muted:#64748b;
  --border:#e2e8f0;
  --bg:#fff;
  --bg-alt:#f8fafc;
  --success:#10b981;
  --warning:#f59e0b;
  --danger:#ef4444;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:15px}
a{color:var(--accent-dark);text-decoration:none}a:hover{text-decoration:underline}
code{font-family:'SF Mono',Consolas,monospace;font-size:.875em;background:#f1f5f9;border:1px solid var(--border);border-radius:4px;padding:.1em .35em}
pre{background:var(--navy);color:#e2e8f0;border-radius:10px;padding:1rem 1.25rem;overflow-x:auto;font-size:.85rem;line-height:1.6;margin:1rem 0}
pre code{background:transparent;border:0;padding:0;color:inherit;font-size:inherit}

/* ── Header ── */
.manual-header{background:linear-gradient(135deg,var(--navy) 0%,#164e63 100%);color:#fff;padding:2.5rem 2rem 2rem;text-align:center}
.manual-logo{display:flex;align-items:center;justify-content:center;gap:.75rem;margin-bottom:1rem}
.manual-logo svg{flex-shrink:0}
.manual-logo-text{text-align:left}
.manual-logo-text h1{font-size:1.5rem;font-weight:800;line-height:1.1}
.manual-logo-text span{font-size:.8rem;opacity:.6;font-weight:500;letter-spacing:.04em}
.manual-header-sub{font-size:.95rem;opacity:.7;margin-top:.25rem}

/* ── Layout ── */
.manual-layout{display:grid;grid-template-columns:260px 1fr;min-height:100vh;max-width:1200px;margin:0 auto}
@media(max-width:768px){
  .manual-layout{grid-template-columns:1fr}
  .toc-sidebar{display:none}
}

/* ── Sidebar TOC ── */
.toc-sidebar{position:sticky;top:0;height:100vh;overflow-y:auto;border-right:1px solid var(--border);padding:1.5rem 0;background:var(--bg-alt)}
.toc-sidebar h3{font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);padding:.25rem 1.25rem .75rem;margin-top:.75rem}
.toc-sidebar h3:first-child{margin-top:0}
.toc-sidebar ol,.toc-sidebar ul{list-style:none;padding:0}
.toc-sidebar li a{display:block;padding:.3rem 1.25rem;font-size:.83rem;color:var(--text-muted);font-weight:500;transition:all .15s;border-left:2px solid transparent}
.toc-sidebar li a:hover{color:var(--accent);background:#ecfeff;text-decoration:none;border-left-color:var(--accent)}
.toc-sidebar li.active a{color:var(--accent-dark);background:var(--accent-light);border-left-color:var(--accent-dark);font-weight:600}
.toc-sidebar .sub-item a{padding-left:2rem;font-size:.8rem}

/* ── Content ── */
.manual-content{padding:2.5rem 2.5rem 4rem;max-width:760px}
.manual-content h2{font-size:1.35rem;font-weight:700;color:var(--navy);margin:2.5rem 0 .75rem;padding-bottom:.5rem;border-bottom:2px solid var(--border);scroll-margin-top:1.5rem}
.manual-content h2:first-of-type{margin-top:0}
.manual-content h3{font-size:1rem;font-weight:700;color:var(--text);margin:1.5rem 0 .5rem;scroll-margin-top:1.5rem}
.manual-content h4{font-size:.9rem;font-weight:600;color:var(--text-muted);margin:1.25rem 0 .4rem;text-transform:uppercase;letter-spacing:.04em}
.manual-content p{margin-bottom:.85rem}
.manual-content ol,.manual-content ul{padding-left:1.6rem;margin-bottom:1rem}
.manual-content li{margin-bottom:.4rem}
.manual-content table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.88rem}
.manual-content th{background:var(--bg-alt);font-weight:600;text-align:left;padding:.6rem .9rem;border:1px solid var(--border);color:var(--text-muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
.manual-content td{padding:.6rem .9rem;border:1px solid var(--border);vertical-align:top}
.manual-content tr:nth-child(even) td{background:var(--bg-alt)}

/* ── Callouts ── */
.tip,.note,.warning,.danger{padding:.85rem 1rem;border-radius:0 10px 10px 0;margin:1.25rem 0;font-size:.88rem}
.tip{background:#ecfeff;border-left:4px solid var(--accent)}
.note{background:#f0f9ff;border-left:4px solid #38bdf8}
.warning{background:#fffbeb;border-left:4px solid var(--warning)}
.danger{background:#fef2f2;border-left:4px solid var(--danger)}
.tip strong{color:var(--accent-dark)}
.note strong{color:#0369a1}
.warning strong{color:#b45309}
.danger strong{color:#b91c1c}

/* ── Badge ── */
.badge{display:inline-flex;align-items:center;font-size:.72rem;font-weight:700;padding:.15rem .5rem;border-radius:999px;letter-spacing:.04em}
.badge-teal{background:var(--accent-light);color:var(--accent-dark)}
.badge-green{background:#d1fae5;color:#065f46}
.badge-amber{background:#fef3c7;color:#92400e}
.badge-red{background:#fee2e2;color:#991b1b}
.badge-slate{background:#f1f5f9;color:var(--text-muted)}

/* ── Steps ── */
.steps{counter-reset:step;list-style:none;padding:0}
.steps li{counter-increment:step;display:flex;gap:.85rem;margin-bottom:1rem;align-items:flex-start}
.steps li::before{content:counter(step);display:flex;align-items:center;justify-content:center;min-width:1.75rem;height:1.75rem;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;font-size:.78rem;flex-shrink:0;margin-top:.1rem}

/* ── Shield icon ── */
.shield-icon{display:inline-block}

/* ── Mobile menu btn ── */
.mobile-toc-toggle{display:none;position:fixed;bottom:1.5rem;right:1.5rem;z-index:50;background:var(--accent);color:#fff;border:0;border-radius:50%;width:3rem;height:3rem;cursor:pointer;font-size:1.2rem;box-shadow:0 4px 12px rgba(0,0,0,.2)}
@media(max-width:768px){.mobile-toc-toggle{display:flex;align-items:center;justify-content:center}}

/* ── Footer ── */
.manual-footer{border-top:1px solid var(--border);padding:2rem;text-align:center;font-size:.8rem;color:var(--text-muted);grid-column:1/-1}

/* ── Scrollbars ── */
*{scrollbar-width:thin;scrollbar-color:var(--accent) var(--bg-alt)}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:var(--bg-alt)}
::-webkit-scrollbar-thumb{background:var(--accent);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:var(--accent-dark)}