:root{--bg:#f4f3ef;--paper:#fff;--ink:#192424;--muted:#626c6c;--line:#dcded8;--blue:#2254e8;--pale:#e9eeff;--green:#177a64;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0}button,a,summary{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}button:disabled{cursor:default;opacity:.38}.skip-link{position:absolute;top:12px;left:20px;z-index:10;padding:12px;background:var(--ink);color:#fff;transform:translateY(-160%)}.skip-link:focus{transform:none}.site-header,main,footer{width:min(1080px,calc(100% - 80px));margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;min-height:100px;border-bottom:1px solid 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summary{display:flex;gap:14px;align-items:center;padding:22px 20px;cursor:pointer;list-style:none;user-select:none}.chapter-group summary::-webkit-details-marker{display:none}.group-index{color:#a2aaa4;font-size:13px;font-variant-numeric:tabular-nums}.group-name{font-size:16px;font-weight:600;flex:1;line-height:1.4}.group-name small{display:block;font-size:12px;font-weight:400;color:var(--muted);margin-top:5px}.expand{color:var(--muted);font-size:23px;font-weight:300}.chapter-group[open] .expand{transform:rotate(45deg)}.chapter-group[open] summary{border-bottom:1px solid #e8ebe5}.chapter-group summary:hover{background:#fafbf8}.chapter-group ol{list-style:none;margin:0;padding:0 10px 10px}.step{width:100%;border:0;background:transparent;text-align:left;display:grid;grid-template-columns:24px minmax(0,1fr) 34px 10px;align-items:center;gap:10px;padding:14px 10px;min-height:52px;color:var(--ink);border-bottom:1px solid #edf0e9}.chapter-group li:last-child 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@media(min-width:1400px){.intro{padding-right:75px;grid-template-columns:minmax(0,1fr) 360px}}
@media(max-width:900px){.site-header,main,footer{width:calc(100% - 48px)}.intro{grid-template-columns:minmax(0,1fr) 310px;gap:35px;padding-right:0}h1{font-size:46px}.lead{font-size:16px}.hero-actions{gap:16px}.preparation{margin-top:24px}.chapter-grid{column-gap:15px}.step{gap:7px}.chapter-group summary{padding:20px 16px}.group-name{font-size:15px}}
@media(max-width:680px){.site-header,main,footer{width:calc(100% - 36px)}.site-header{min-height:77px}.brand{gap:13px}.brand img{width:123px}.brand-divider{height:20px}.brand>span:last-child{font-size:17px}.audience{font-size:10px}.intro{display:flex;flex-direction:column;gap:27px;padding:30px 0 35px;align-items:stretch}.eyebrow{font-size:9px;letter-spacing:1.4px;margin-bottom:13px}h1{font-size:43px;letter-spacing:-1.8px;margin-bottom:13px}h1 br{display:none}h1 span{display:block}.lead{font-size:15px;line-height:1.6;max-width:100%;margin-bottom:14px}.video-meta{font-size:11px}.hero-actions{margin:20px 0 0;gap:22px}.primary{padding:14px 18px;font-size:13px}.text-link{font-size:13px}.preparation{margin-top:22px;padding-top:18px;max-width:100%;gap:10px}.preparation h2{font-size:12px;margin-bottom:4px}.preparation p{font-size:12px}.prep-mark{height:23px;flex-basis:23px;font-size:13px}.small-tip{display:none}.player-column{max-width:min(370px,40svh);min-width:0;align-self:center}.player-shell{border-radius:13px;padding:4px}video{border-radius:8px}.now-playing{font-size:11px;min-height:32px;margin:7px 0}.secondary{font-size:11px;min-height:42px;padding:9px}.steps-section{padding:29px 0}.section-heading h2{font-size:29px}.step-count{font-size:11px}.section-description{font-size:13px;margin:12px 0 20px}.chapter-grid{columns:1}.chapter-group{margin-bottom:12px}.chapter-group summary{padding:20px 16px}.step-title{font-size:14px}.step{padding:15px 9px;grid-template-columns:22px minmax(0,1fr) 34px 10px;gap:9px;min-height:56px}.useful{grid-template-columns:1fr;gap:22px;padding:26px 0}.useful h2{font-size:14px}.downloads{flex-direction:column;align-items:flex-start;gap:20px;padding:5px 0 30px}footer{flex-direction:column;gap:8px;padding:21px 0 25px}.resume{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

@media(max-width:400px){.audience{display:none}}
.chapter-group summary:focus-visible{outline-offset:-4px;border-radius:9px}

.video-loading{display:flex;align-items:center;gap:10px;margin:12px 0;font-size:11px;color:var(--muted)}.video-loading progress{width:auto;flex:1;min-width:0;height:5px;accent-color:var(--blue)}