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22px}.contents{position:static;padding-top:25px}.contents>.eyebrow,.side-note{display:none}.contents nav{display:flex;overflow-x:auto;gap:8px;padding-bottom:10px}.contents nav a{white-space:nowrap;border:1px solid var(--line);padding:10px}.contents nav span{display:none}.hero{padding-top:30px}h1{font-size:44px;letter-spacing:-1.8px}.intro{font-size:16px}.hero-actions{flex-wrap:wrap;gap:15px}.overview{gap:14px}.before{padding:18px;gap:12px;margin-bottom:40px}.steps{grid-template-columns:1fr;gap:20px}.steps li{position:relative;padding-left:30px}.steps li:before{position:absolute;left:0;top:2px}.steps h3{margin:0 0 6px}.lesson-heading{gap:14px}h2{font-size:25px}.number{width:34px;height:34px}.walkthrough figcaption{padding:11px;flex-wrap:wrap;gap:10px}.closing{padding:25px}.lesson{padding-bottom:30px;margin-bottom:30px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.guide-header,.contents,.hero-actions,.walkthrough button,footer,.closing 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.walkthrough .full-size{color:#d9e8e5;font-size:12px;text-underline-offset:3px;margin-left:auto}

body.viewer-open{overflow:hidden}
.media-viewer{position:fixed;inset:0;width:100vw;max-width:none;height:100dvh;max-height:none;margin:0;padding:0;border:0;border-radius:0;background:#070c10;color:#edf2ef;overflow:hidden}
.media-viewer[open]{display:block}.media-viewer::backdrop{background:#070c10}
.media-viewer header,.viewer-controls{position:absolute;left:0;right:0;z-index:2;display:flex;align-items:center;gap:12px;padding:18px 22px;opacity:1;transition:opacity .18s ease;pointer-events:auto}
.media-viewer header{top:0;justify-content:space-between;gap:20px;background:linear-gradient(#070c10ed,#070c10a6,transparent);padding-bottom:32px}
.media-viewer h2{font-size:20px;margin:0;text-shadow:0 1px 4px #000}.media-viewer header p{font-size:12px;color:#cbd9d2;margin:8px 0 0}
.media-viewer button{padding:11px 16px;min-height:44px;border:1px solid #82988d;border-radius:6px;background:#1c302aed;color:#edf2ef;white-space:nowrap}
.viewer-controls{bottom:0;flex-wrap:wrap;background:linear-gradient(transparent,#070c10cf,#070c10f5);padding-top:32px;padding-bottom:max(18px,env(safe-area-inset-bottom))}
.viewer-controls span{color:#e3ece6;font-size:12px}.viewer-stage{position:absolute;inset:0;overflow:auto;text-align:center;padding:0;touch-action:pan-x pan-y pinch-zoom}
.viewer-stage img{display:block;width:100%;height:100%;object-fit:contain;margin:auto}.is-actual-size .viewer-stage img{width:1440px;height:960px;max-width:none;object-fit:initial}
.media-viewer.controls-hidden header,.media-viewer.controls-hidden .viewer-controls{opacity:0;pointer-events:none}.media-viewer.controls-hidden:not(.is-actual-size) .viewer-stage{cursor:none}
.media-viewer button:focus-visible,.viewer-stage:focus-visible{outline:3px solid #efbd65;outline-offset:-3px}
@media(max-width:600px){.media-viewer header{padding:12px 12px 28px;gap:12px}.media-viewer h2{font-size:16px}.media-viewer header p{display:none}.viewer-controls{padding:28px 12px max(12px,env(safe-area-inset-bottom));gap:8px}.viewer-controls span{font-size:11px}}
@media(prefers-reduced-motion:reduce){.media-viewer header,.viewer-controls{transition:none}}
