*{box-sizing:border-box}body{margin:0;background:#f7f9fc;color:#172033;font-family:system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.7}a{color:inherit}.topbar{height:64px;background:#fff;border-bottom:1px solid #e6eaf0;display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:30}.brand{text-decoration:none;font-size:25px;font-weight:800}.top-link{text-decoration:none;font-weight:650}.layout{display:grid;grid-template-columns:285px minmax(0,1fr);max-width:1450px;margin:auto;min-height:calc(100vh - 64px)}.sidebar{background:#fff;border-right:1px solid #e6eaf0;padding:24px 14px;position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto}.sidebar-title{font-size:14px;font-weight:800;color:#687386;text-transform:uppercase;letter-spacing:.08em;padding:4px 12px 14px}.category-toggle{width:100%;display:flex;justify-content:space-between;border:0;background:none;padding:10px 12px;border-radius:8px;font:inherit;font-weight:750;cursor:pointer;text-align:left}.category-toggle:hover{background:#f0f3f8}.arrow{transition:.2s}.category.open .arrow{transform:rotate(90deg)}.subnav{display:none;padding-left:12px}.category.open .subnav{display:block}.feature-link{display:block;text-decoration:none;padding:8px 10px;margin:2px 0;border-radius:7px;color:#687386;font-size:14px;font-weight:600}.feature-link:hover{background:#f3f5f9}.feature-link.active{background:#e9eefc;color:#172033;font-weight:800}.content{padding:38px clamp(22px,5vw,80px) 90px;max-width:1050px;width:100%;margin:auto}.breadcrumbs{display:flex;gap:9px;flex-wrap:wrap;font-size:14px;color:#758094;margin-bottom:35px}.breadcrumbs a{text-decoration:none}.eyebrow{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:#687386}.feature-header{max-width:850px}h1{font-size:clamp(36px,5vw,62px);line-height:1.08;letter-spacing:-1.8px;margin:0 0 18px}.lead{font-size:20px;color:#596578}.feature-image{margin:40px 0 48px;background:#fff;border:1px solid #e4e9f0;border-radius:18px;overflow:hidden}.feature-image img{display:block;width:100%}.feature-image figcaption{padding:12px 18px;font-size:13px;color:#6d7787}.feature-body{max-width:820px}.feature-body h2{font-size:28px;margin:42px 0 12px}.feature-body p{font-size:17px;color:#4e596b}@media(max-width:800px){.layout{display:block}.sidebar{position:sticky;top:64px;height:auto;border-right:0;border-bottom:1px solid #e6eaf0;padding:9px;overflow-x:auto}.sidebar-title{display:none}.category{display:inline-block;vertical-align:top}.category-toggle{white-space:nowrap;width:auto}.subnav{min-width:210px}.content{padding:25px 18px 60px}h1{letter-spacing:-1px}.lead{font-size:18px}}
.feature-body ol,.feature-body ul{margin:10px 0 18px;padding-left:24px;font-size:17px;color:#4e596b}.feature-body li{margin:8px 0;padding-left:4px}.feature-body li::marker{color:#1f5eff;font-weight:700}.feature-body .note{background:#eef3ff;border-left:4px solid #1f5eff;border-radius:8px;padding:12px 16px;font-size:15px;color:#33415c}.feature-body a{color:#1f5eff;font-weight:600}.feature-body strong{color:#172033}
.brand{display:flex;align-items:center}.brand img{display:block;height:42px;width:auto}
.feature-image img{height:auto}
.feature-body h3{font-size:20px;margin:26px 0 8px;color:#172033}.feature-body figure.feature-image{margin:26px 0 30px}

/* index: feature cards */
.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:8px}
.feature-card{background:#fff;border:1px solid #e3e9f2;border-radius:16px;padding:20px 22px;box-shadow:0 6px 18px rgba(20,50,90,.06)}
.feature-card h3{margin:0 0 10px;font-size:19px}
.feature-card ul{list-style:none;margin:0;padding:0}
.feature-card li{padding:9px 0;border-top:1px solid #eef2f8;display:flex;flex-direction:column;gap:2px}
.feature-card li:first-child{border-top:0}
.feature-card li a{font-weight:700}
.feature-card li span{color:#5a6b82;font-size:14.5px}
@media (max-width:720px){.feature-grid{grid-template-columns:1fr}}

/* small screens: the menu scrolls away instead of covering the page */
@media (max-width:800px){.sidebar{position:static;top:auto}.topbar{padding:0 18px}.feature-image a{display:block}.feature-image figcaption{font-size:12.5px}}
.feature-image a{display:block;cursor:zoom-in}