:root{font:16px/1.6 'Segoe UI',system-ui,sans-serif;color:#25364c;background:#f5f7fb;--navy:#14233b;--blue:#2861f5;--muted:#586b83;--line:#dce4ef}*{box-sizing:border-box}body{margin:0}a{color:var(--blue);text-underline-offset:3px}a:focus-visible,button:focus-visible,select:focus-visible{outline:3px solid #edb54d;outline-offset:4px}button,select{font:inherit}header{padding:24px max(24px,calc((100vw - 1260px)/2));background:var(--navy);border-bottom:4px solid var(--blue);display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{color:#fff;text-decoration:none;font-size:28px;font-weight:800;letter-spacing:-1px;line-height:1.1}.brand span{color:#8eb0ff}.brand small{display:block;font-size:9px;font-weight:600;letter-spacing:2px;margin-top:7px;color:#e2eafa}header nav{display:flex;gap:28px}header nav a{font-size:14px;color:#fff;text-decoration:none}header nav a:hover{text-decoration:underline}.skip{position:absolute;top:-80px;padding:12px;background:#fff;z-index:5}.skip:focus{top:8px}main{max-width:1260px;margin:auto;padding:60px 24px}.hero{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;padding-bottom:70px}.eyebrow{font-size:11px;letter-spacing:1.8px;font-weight:750;color:var(--blue);margin:0 0 15px}h1{font-size:clamp(36px,4vw,56px);line-height:1.1;letter-spacing:-1.8px;margin:0 0 25px;color:var(--navy)}h2{font-size:30px;line-height:1.22;letter-spacing:-.8px;color:var(--navy);margin:0 0 15px}h3{font-size:22px;line-height:1.3;letter-spacing:-.35px;color:var(--navy);margin:12px 0}p{margin:12px 0 19px}.intro{font-size:19px;color:var(--muted);max-width:530px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin:27px 0 20px}.button{display:inline-block;text-decoration:none;font-size:14px;font-weight:700;line-height:1.45;padding:13px 17px;border-radius:9px;border:1px solid transparent}.blue{color:#fff;background:var(--blue)}.dark{color:#fff;background:var(--navy)}.light{color:var(--navy);background:#fff;border-color:#c7d3e3}.button:hover{filter:brightness(.96)}.small{font-size:13px}.muted{color:var(--muted)}figure{margin:0}figure img{width:100%;height:auto;display:block;border:1px solid #cad5e4;border-radius:11px;box-shadow:0 20px 50px #14233b15}figcaption{font-size:11px;color:var(--muted);margin-top:12px;text-align:center}.section-head{max-width:690px;margin-bottom:27px}.section-head>p:last-child{color:var(--muted)}.role-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.role-card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:12px;padding:30px 32px;box-shadow:0 8px 28px #14233b06}.role-card:last-child{border-top-color:var(--navy)}.role-label{color:var(--muted);font-size:10px;font-weight:750;letter-spacing:1.3px}.role-card>p{min-height:77px;color:var(--muted)}.role-card ul{padding:18px 0 0;list-style:none;margin:12px 0 0;border-top:1px solid var(--line)}.role-card li{margin:10px 0}.role-card li a{font-size:14px;text-decoration:none}.role-card li a:hover{text-decoration:underline}.learning{margin:65px 0}.method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:30px}.method-grid article{border-top:1px solid #bacbe7;padding-top:22px}.method-grid b{font-size:25px;color:var(--blue)}.method-grid h3{font-size:19px}.method-grid p{font-size:14px;color:var(--muted)}.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:45px;padding:35px;background:#ebf1fc;border-radius:12px}.help-grid h2{font-size:23px}.help-grid p{font-size:14px;color:#455b76}.help-grid a{font-size:14px;font-weight:650}footer{border-top:1px solid var(--line);max-width:1260px;margin:auto;padding:25px 24px;display:flex;justify-content:space-between;gap:20px;font-size:11px;color:var(--muted)}.demo-heading{max-width:760px}.demo-layout{display:grid;grid-template-columns:minmax(0,1fr) 275px;gap:28px;margin:28px 0}.video-box{background:#0d1728;border-radius:10px;overflow:hidden}.video-box video{display:block;width:100%;aspect-ratio:16/9}.caption-band{min-height:64px;padding:16px 22px;color:#fff;text-align:center;font-size:clamp(15px,1.5vw,21px);font-weight:650;line-height:1.5;background:#14233b}.caption-band[hidden]{display:none}.player-buttons{display:flex;gap:8px;justify-content:flex-end;padding:9px 12px;border-top:1px solid #364860;background:#14233b}.player-buttons button{font-size:12px;background:#243852;color:#fff;border:1px solid #647591;padding:7px 11px;border-radius:6px;cursor:pointer}.video-box:fullscreen{width:100vw;height:100vh;border-radius:0;display:flex;flex-direction:column;background:#0d1728}.video-box:fullscreen video{width:100%;min-height:0;flex:1;height:0;object-fit:contain;aspect-ratio:auto}.video-box:fullscreen .caption-band{flex:none;font-size:clamp(18px,2.1vw,28px)}.video-box:fullscreen .player-buttons{flex:none}.video-tools{display:flex;gap:14px;align-items:center;flex-wrap:wrap;padding:18px 0;font-size:13px}.video-tools select{border:1px solid #becbe0;border-radius:7px;background:#fff;padding:8px;color:var(--navy);font-size:13px}.chapters{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px;align-self:start}.chapters h2{font-size:19px}.chapters button{display:flex;gap:11px;text-align:left;width:100%;border:0;border-radius:6px;padding:10px 6px;margin:2px 0;background:transparent;font-size:12px;color:#334961;cursor:pointer;line-height:1.4}.chapters button:hover,.chapters button[aria-current=true]{background:#edf3ff;color:#164fce}.chapters time{font-size:11px;min-width:34px;font-weight:700}.demo-note{font-size:13px;color:var(--muted);margin-top:12px}.downloads{display:flex;gap:18px;flex-wrap:wrap;font-size:13px}.demo-bottom{margin-top:30px;border-top:1px solid var(--line);padding-top:28px}.demo-bottom h2{font-size:23px}@media(max-width:960px){.hero{gap:28px}.method-grid{grid-template-columns:repeat(2,1fr)}.demo-layout{grid-template-columns:1fr}.chapters{display:grid;grid-template-columns:1fr 1fr;gap:4px}.chapters h2{grid-column:1/-1}}@media(max-width:650px){header{padding:20px;align-items:flex-start;gap:17px}.brand{font-size:24px}.brand small{font-size:8px}header nav{gap:13px;flex-wrap:wrap;max-width:150px;justify-content:flex-end}header nav a{font-size:12px}main{padding:35px 20px}.hero,.role-grid,.help-grid{grid-template-columns:1fr}.hero{padding-bottom:43px;gap:26px}.hero figure{max-width:500px}.role-card{padding:24px}.role-card>p{min-height:0}.method-grid{gap:21px}.method-grid h3{font-size:17px}.help-grid{padding:24px;gap:25px}.learning{margin:42px 0}footer{flex-direction:column;gap:7px;padding:22px 20px}.chapters{grid-template-columns:1fr}.chapters button{font-size:13px}h1{letter-spacing:-1px}}
