@font-face{font-family:Inter;src:url(/tutorial/inter-latin-variable.woff2) format("woff2");font-weight:100 900;font-display:swap}*{box-sizing:border-box}html{color-scheme:dark;scroll-behavior:smooth}body{margin:0;background:#151916;color:#edf1ed;font-family:Inter,system-ui,sans-serif;line-height:1.65}a{color:#b6d7c3;text-underline-offset:4px}header,main,footer{max-width:1000px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid #354139}.logo{display:flex;gap:10px;align-items:center;font-size:20px;font-weight:700;text-decoration:none}.logo img{width:34px;height:34px}main{padding-top:48px;padding-bottom:48px}.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:12px;font-weight:700;color:#8bbfa8}h1{font-size:clamp(32px,6vw,52px);line-height:1.12;letter-spacing:-.035em;margin:12px 0 20px}h2{font-size:22px;line-height:1.3;margin:0 0 10px}.intro{max-width:680px;color:#a7b0a9;font-size:18px;margin-bottom:30px}.panel{border:1px solid #354139;border-radius:20px;background:#1b211d;overflow:hidden}video{display:block;width:100%;aspect-ratio:16/9;background:#000;object-fit:contain}.player-body{padding:24px}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:18px}button{font:inherit;cursor:pointer}.play{border:0;border-radius:999px;background:#8bbfa8;color:#102018;font-weight:650;padding:12px 22px}.status{font-size:14px;color:#a7b0a9;margin-bottom:0}.status:empty{display:none}.chapters{border-top:1px solid #354139;margin-top:24px;padding-top:20px}.chapters ol{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;padding:0;margin-bottom:0}.chapter{display:flex;align-items:center;gap:12px;width:100%;height:100%;padding:14px;border:1px solid #354139;border-radius:12px;background:transparent;color:#a7b0a9;text-align:left;font-size:14px}.chapter[aria-current=step]{background:#8bbfa81a;border-color:#8bbfa8;color:#edf1ed}.chapter time{color:#b6d7c3;font-variant-numeric:tabular-nums;font-size:12px}.help{margin-top:28px;color:#a7b0a9;font-size:14px}footer{border-top:1px solid #354139;font-size:13px;color:#a7b0a9}:focus-visible{outline:2px solid #b6d7c3;outline-offset:4px}[hidden]{display:none!important}@media(max-width:600px){header,main,footer{padding-left:20px;padding-right:20px}header{font-size:13px}.chapters ol{grid-template-columns:1fr}.player-body{padding:18px}main{padding-top:32px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}