:root{--bg:#eef2f3;--paper:#fff;--ink:#162a32;--muted:#56686f;--line:#ccd8dc;--accent:#176780;--tint:#dfedf1;--warn:#8b5911;--warnbg:#fff1d7;--ok:#23764e;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.65 system-ui,-apple-system,"PingFang SC","Noto Sans CJK SC",sans-serif}a{color:var(--accent);text-underline-offset:4px}a:focus-visible,button:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.wrap{max-width:1180px;margin:auto;padding:0 28px}header{background:var(--paper);border-bottom:1px solid var(--line);padding:30px 0 0}.back{font-size:13px}.eyebrow{font:12px/1.5 ui-monospace,monospace;letter-spacing:.09em;color:var(--accent);margin:28px 0 12px}h1{font-size:clamp(34px,5.5vw,60px);letter-spacing:-.045em;line-height:1.15;margin:0 0 20px}h2{font-size:28px;line-height:1.3;margin:0}h3{font-size:17px;margin:0 0 8px}p{margin:0 0 12px}.lede{max-width:760px;color:var(--muted);font-size:17px}.chips{display:flex;flex-wrap:wrap;gap:7px;margin:24px 0}.chips span,.badge{font-size:12px;padding:4px 10px;border:1px solid var(--line);border-radius:4px}nav{display:flex;gap:26px;border-top:1px solid var(--line);padding:17px 0}nav a{text-decoration:none;font-weight:600;font-size:14px}main{padding-top:24px!important}.notice{padding:15px 20px;border-left:3px solid var(--accent);background:var(--tint);margin:0 0 30px}.episode{background:var(--paper);border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-bottom:28px}.episode-head{padding:24px 26px;display:flex;gap:20px;align-items:center;justify-content:space-between}.episode-head .eyebrow{margin:0 0 5px}.badge{white-space:nowrap;font-weight:600;background:var(--bg)}.badge.invalid{background:var(--warnbg);color:var(--warn);border-color:#e4c89d}.badge.success{color:var(--ok);background:#e0f2e8}.viewer{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.screen{min-width:0;background:#102129;display:flex;flex-direction:column;justify-content:center}.screen video{display:block;width:100%;aspect-ratio:4/3;background:#102129}.video-controls{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;color:#d5e5e9;font-size:12px}.video-controls a{color:#a9d9e7}select,button{font:inherit;border:1px solid var(--line);border-radius:4px;padding:5px 9px;background:var(--paper);color:var(--ink)}select{margin-left:6px}.instructions{padding:24px;min-width:0}.label{font-size:12px;color:var(--muted);margin-bottom:5px}.instruction{font-size:16px;font-weight:600;line-height:1.55}.translation{font-size:13px;color:var(--muted)}.stats{display:flex;gap:26px;flex-wrap:wrap;margin:22px 0}.stat strong{display:block;font:600 22px/1.4 ui-monospace,monospace}.stat small{color:var(--muted);font-size:12px}.finding{padding:13px 15px;background:var(--bg);border-radius:4px;font-size:14px}.rules{padding-left:20px;margin:12px 0 6px}.rules li{margin:6px 0;font-size:14px}.rule-link{font-size:12px}.record{padding:20px 26px}.record summary{cursor:pointer;font-weight:600}.timeline-help{font-size:12px;color:var(--muted);margin:10px 0}.timeline{max-height:450px;overflow:auto;border-top:1px solid var(--line);padding-top:6px}.command{display:grid;grid-template-columns:88px minmax(0,1fr);gap:12px;padding:12px 0;border-bottom:1px solid var(--line);font-size:13px}.command button{align-self:start;cursor:pointer;font:12px/1.5 ui-monospace,monospace}.command pre{white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.6 ui-monospace,monospace;margin:8px 0 0;color:var(--muted)}.command .note{white-space:pre-wrap;overflow-wrap:anywhere;margin-top:7px;color:var(--muted)}.command.active{background:var(--tint)}.history{margin-bottom:28px}.history>summary{cursor:pointer;color:var(--warn);padding:15px 20px;background:var(--warnbg);border:1px solid #e4c89d;border-radius:6px;margin-bottom:18px}.protocol{padding:8px 0 20px}.protocol-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:24px}.protocol-grid p{color:var(--muted);font-size:14px}.version{font-size:12px;border-top:1px solid var(--line);padding-top:18px;margin-top:16px;color:var(--muted)}footer{padding-top:15px!important;padding-bottom:32px!important;font-size:12px;color:var(--muted)}[hidden]{display:none!important}@media(max-width:760px){.wrap{padding-left:16px;padding-right:16px}.viewer{grid-template-columns:1fr}.episode-head{padding:20px 18px}.instructions{padding:20px 18px}.record{padding:18px}.protocol-grid{grid-template-columns:1fr;gap:12px}.stats{gap:20px}nav{gap:18px}nav a{font-size:12px}.episode-head h2{font-size:24px}.badge{font-size:11px}.video-controls{flex-wrap:wrap}.command{grid-template-columns:76px minmax(0,1fr)}}