:root{--bg:#edf1f4;--text:#182b3a;--muted:#516472;--line:#cbd5dc;--accent:#006791;--max:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit}button{font:inherit}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #007fab;outline-offset:4px}
.hero{background:#142c3c;color:#fff;padding:36px max(24px,calc((100vw - 1192px)/2)) 30px;border-top:6px solid #0095c6}.kicker{font:700 .875rem/1.5 ui-monospace,monospace;letter-spacing:.06em;text-transform:uppercase;color:#88d8f1}h1{font-size:clamp(2rem,4vw,3.4rem);line-height:1.1;letter-spacing:-.03em;margin:16px 0;max-width:960px}h1 br{display:none}h1 br:after{content:" "}.subtitle{max-width:850px;color:#d1e0e9;margin:0}.meta{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:22px}.pill{font-size:.875rem;color:#c9dce6;border-left:2px solid #0095c6;padding-left:10px}
.shell{max-width:var(--max);margin:auto;display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px;padding:32px 24px 72px}nav{position:sticky;top:24px;align-self:start;border-top:3px solid #183a50;padding-top:10px}nav:before{content:"INSTALLATION INDEX";display:block;font:700 .875rem/1.5 ui-monospace,monospace;letter-spacing:.04em;padding:8px 12px;color:var(--muted)}nav a{display:block;text-decoration:none;padding:10px 12px;border-bottom:1px solid var(--line);font-size:.9375rem}nav a:hover,nav a[aria-current]{background:#d9eaf2;color:#005c81}main{min-width:0}.notice{background:#fff7e0;border:1px solid #d8ba68;border-left:5px solid #a96700;padding:22px;margin-bottom:24px}.notice h2{margin:0 0 10px;font-size:1.2rem;color:#744400}.notice ul{margin:0;padding-left:22px}.notice li+li{margin-top:6px}.source-note{border-left:3px solid var(--accent);padding:8px 0 8px 16px;color:var(--muted);margin:24px 0}.step{background:#fff;border:1px solid var(--line);border-top:3px solid #193d53;padding:28px;margin-bottom:32px;scroll-margin-top:20px}.step-head{display:flex;gap:16px;align-items:flex-start}.step-num{flex:0 0 48px;height:48px;background:#193d53;color:white;display:grid;place-items:center;font:700 1.25rem ui-monospace,monospace}.step h2{font-size:1.6rem;line-height:1.25;margin:0;letter-spacing:-.02em}.summary{color:var(--muted);margin:10px 0 0}.video-wrap{margin:24px 0 18px;background:#101820;border:1px solid #102d3e}.video-wrap video{display:block;width:100%;max-height:580px;background:#101820}video::cue{color:#fff;background:rgba(0,0,0,.85)}.label{font-size:.875rem;font-weight:750}.manufacturer{color:#14663f}.tip{color:#00658c}.translation{color:#865400}.callout{margin:16px 0;padding:12px 16px;background:#f3f6f8;border-left:3px solid var(--line)}.callout .label{display:block;margin-bottom:4px}.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:22px 0}figure{margin:0;border:1px solid var(--line);background:#f3f6f8}figure img{display:block;width:100%;height:auto}figcaption{padding:12px;color:var(--muted);font-size:.875rem}details{border-top:1px solid var(--line);margin-top:24px;padding-top:16px}summary{cursor:pointer;font-weight:650;padding:6px 0}.transcript{margin-top:16px;overflow-x:auto}.transcript table{width:100%;border-collapse:collapse;font-size:.9375rem}.transcript th,.transcript td{text-align:left;vertical-align:top;padding:12px 10px;border-bottom:1px solid var(--line)}.transcript th{background:#edf2f5;font-size:.875rem}.transcript td:nth-child(2){width:34%}.timebtn{border:1px solid #bbd5e2;background:#eaf4fa;color:#005a80;min-height:44px;padding:7px 10px;cursor:pointer;font-family:ui-monospace,monospace}.timebtn:hover{background:#cfe8f5}.checks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px;margin-top:20px}.check{padding:16px 0;border-top:1px solid var(--line)}.footer{color:var(--muted);border-top:1px solid var(--line);padding-top:16px;font-size:.875rem}.caption-note{font-size:.875rem;color:var(--muted);margin:8px 0 16px}code{background:#e2eaf0;padding:2px 5px}
@media(max-width:820px){.hero{padding:28px 20px}.shell{grid-template-columns:1fr;gap:24px;padding:24px 20px 48px}nav{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}nav:before{grid-column:1/-1}.step{padding:20px}.gallery,.checks{grid-template-columns:1fr}.step-head{gap:12px}.step-num{flex-basis:40px;height:40px}.step h2{font-size:1.35rem}.transcript table{min-width:520px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{body{background:white}.hero{background:white;color:#182b3a;padding:16px 0}.kicker,.subtitle,.pill{color:#182b3a}.shell{display:block;padding:0}nav,.video-wrap{display:none}.step{break-inside:avoid}.hero{border-top:0}}

.disclaimer{background:#fff3ee;border-color:#d6aa99;border-left-color:#a43e1a}.disclaimer h2{color:#883113}.disclaimer p{margin:12px 0}.disclaimer blockquote{margin:12px 0;padding-left:16px;border-left:2px solid #d6aa99}.callout ol{margin:8px 0;padding-left:22px}.callout li+li{margin-top:8px}.step a,.caption-note a{text-underline-offset:3px}.step a:hover{color:#00658c}