:root{--bg:#f5f7fb;--sidebar:#1f2937;--accent:#06b6d4;--text:#111827;--surface:#ffffff;--muted:#4b5563;--border:rgba(17,24,39,.08)}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica Neue,Arial;background:linear-gradient(180deg,#f8fafc,#eef4fb);color:var(--text)}.app{display:flex;flex-direction:column;min-height:100vh}.sidebar{position:relative;z-index:11;background:var(--sidebar);color:#fff;padding:16px;border-bottom:1px solid rgba(255,255,255,.08)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{font-size:20px;font-weight:700;margin:0}.menu-toggle{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid rgba(255,255,255,.2);background:#ffffff0f;color:inherit;border-radius:999px;padding:8px 14px;font:inherit;font-weight:600;cursor:pointer}.sidebar-nav{display:none;padding-top:12px}.sidebar-nav.open{display:block}.menu-overlay{position:fixed;top:0;right:0;bottom:0;left:0;border:0;background:#0f172a61;opacity:0;pointer-events:none;transition:opacity .18s ease;z-index:10}.menu-overlay.visible{opacity:1;pointer-events:auto}.sidebar ul{display:flex;flex-direction:column;gap:8px;list-style:none;padding:0;margin:0}.sidebar li{margin:0}.sidebar button{width:100%;background:transparent;border:0;color:inherit;text-align:left;padding:10px 14px;border-radius:14px;cursor:pointer;white-space:nowrap}.sidebar li.active button{background:linear-gradient(90deg,#ffffff1f,#ffffff0a)}.content{flex:1;padding:20px 16px 32px}h1,h2,p{margin-top:0}h1{font-size:clamp(2rem,6vw,2.8rem);line-height:1.05;margin-bottom:12px}h1:focus{outline:3px solid rgba(6,182,212,.28);outline-offset:6px}h2{font-size:1.1rem;line-height:1.2;margin-bottom:10px}p{line-height:1.6;color:var(--muted)}.main-area{display:flex;flex-direction:column;flex:1;min-width:0}.footer{background:transparent;color:var(--text);padding:14px 16px;border-top:1px solid rgba(0,0,0,.06);text-align:center}.footer .container{max-width:1000px;margin:0 auto;font-size:14px;opacity:.9}.page-section{width:100%}.page-container{max-width:1120px;margin:0 auto;display:grid;gap:16px}.page-hero{display:grid;gap:8px;max-width:720px}.page-kicker{margin-bottom:0;font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#0f766e}.page-lead{font-size:1rem}.page-grid{display:grid;gap:16px}.surface-card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:18px;box-shadow:0 18px 45px #0f172a0f}.feature-card{min-height:100%}.accent-card{background:linear-gradient(180deg,#ecfeff,#fff)}@media (min-width: 640px){.sidebar{padding:18px 20px}.sidebar-header{align-items:flex-start}.menu-toggle{display:none}.sidebar-nav{display:block;padding-top:14px;overflow-x:auto}.menu-overlay{display:none}.sidebar ul{flex-direction:row;min-width:max-content}.sidebar button{text-align:center;border-radius:999px}.content{padding:28px 24px 40px}.footer{padding:16px 24px}.page-container{gap:20px}.page-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width: 768px){h1{font-size:clamp(2.4rem,5vw,3.4rem)}.page-lead{font-size:1.1rem}.page-container{gap:24px}.page-grid{gap:20px}.page-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.surface-card{padding:22px}}@media (min-width: 1024px){.app{flex-direction:row}.sidebar{width:240px;padding:24px 14px;border-right:1px solid rgba(255,255,255,.08);border-bottom:0}.sidebar-header{display:block}.brand{margin-bottom:16px}.sidebar-nav{padding-top:0;overflow:visible}.sidebar ul{display:block;min-width:0}.sidebar li{margin-bottom:8px}.sidebar button{text-align:left;border-radius:10px;padding:10px 12px}.content{padding:36px 40px 48px}.footer{padding:18px 24px}.page-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}}