:root{--ink:#111;--muted:#555;--line:#999;--paper:#fff;--soft:#f5f5f5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.72 ui-serif,Georgia,"Songti SC","STSong","Noto Serif CJK SC",serif}.skip-link{position:absolute;top:-60px;left:8px;background:#fff;color:#000;padding:8px;border:1px solid #000;z-index:10}.skip-link:focus{top:8px}.sidebar{position:fixed;inset:0 auto 0 0;width:270px;padding:18px 13px;border-right:1px solid var(--line);background:#fff;overflow:auto;z-index:5}.brand{display:flex;gap:9px;align-items:center;padding:0 5px 15px;border-bottom:1px solid var(--line)}.brand-mark{display:grid;place-items:center;width:28px;height:28px;border:1px solid var(--ink);font-weight:800;font-family:ui-sans-serif,system-ui}.brand strong{display:block;font-family:ui-sans-serif,system-ui;font-size:14px}.brand small{display:block;color:var(--muted);font-size:11px}.progress-wrap{margin:14px 5px;padding-bottom:12px;border-bottom:1px solid var(--line)}.progress-copy{display:flex;justify-content:space-between;font:12px ui-sans-serif,system-ui}.progress-track{height:3px;margin-top:7px;background:#ddd}.progress-track i{display:block;height:100%;width:0;background:#111;transition:.2s}.search{display:flex;align-items:center;gap:7px;margin:0 5px 12px;padding:7px 0;border-bottom:1px solid var(--line);color:var(--muted)}.search input{border:0;outline:0;width:100%;background:transparent;color:var(--ink);font:13px ui-sans-serif,system-ui}.search input::placeholder{color:#777}nav details{margin:1px 0}nav summary{list-style:none;cursor:pointer;padding:7px 5px;font:700 12px ui-sans-serif,system-ui}nav summary::-webkit-details-marker{display:none}nav summary::after{content:'+';float:right}nav details[open] summary::after{content:'−'}nav a{display:block;padding:5px 7px;margin:1px 0;color:#222;text-decoration:none;border-left:2px solid transparent;font-size:12px;line-height:1.4}nav a:hover,nav a.active{border-left-color:#111;text-decoration:underline}main{margin-left:270px;min-height:100vh}.topbar{height:43px;padding:0 4vw;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);background:#fff;color:#333;font:12px ui-sans-serif,system-ui}.topbar button{display:none;border:1px solid var(--line);padding:4px 7px;background:#fff;font:inherit;cursor:pointer}.overview,.chapter{max-width:930px;margin:auto;padding-left:4vw;padding-right:4vw}.overview{padding-top:26px;padding-bottom:15px;border-bottom:1px solid var(--line)}.eyebrow{color:#444;font:700 11px ui-sans-serif,system-ui;letter-spacing:.05em}.overview h1{font-size:29px;line-height:1.2;letter-spacing:0;margin:5px 0}.overview p{margin:0;color:#444;font-size:14px}.chapter{padding-top:22px;padding-bottom:55px}.chapter-card{padding:0}.domain-label{color:#444;font:700 12px ui-sans-serif,system-ui}.chapter h2{font-size:27px;line-height:1.22;letter-spacing:0;margin:5px 0 15px}.focus{margin:16px 0 12px;padding:10px 13px;border-left:3px solid #111;font-size:15px}.focus b{display:block;font:700 11px ui-sans-serif,system-ui;letter-spacing:.06em;margin-bottom:3px}.tags{display:flex;gap:6px;flex-wrap:wrap}.tag{padding:2px 7px;border:1px solid #999;font:11px ui-sans-serif,system-ui}.completion{margin:18px 0 0;display:flex;align-items:center;gap:8px;font:12px ui-sans-serif,system-ui}.completion input{width:15px;height:15px;accent-color:#111}.chapter-section{margin-top:25px}.translation{border-top:1px solid var(--line);padding-top:20px}.translation-pending{padding:10px;border:1px solid var(--line);color:#555}.empty{padding:28px;text-align:center;color:var(--muted)}@media(max-width:820px){.sidebar{transform:translateX(-103%);transition:.2s;box-shadow:4px 0 14px #0002}.sidebar.open{transform:translateX(0)}main{margin-left:0}.topbar button{display:block}.overview,.chapter{padding-left:20px;padding-right:20px}.overview{padding-top:20px}.chapter{padding-top:18px}}@media print{@page{size:A4;margin:14mm 16mm}html,body{background:#fff;color:#000;font-size:10.5pt;line-height:1.55}.sidebar,.topbar,.overview,.skip-link{display:none!important}main{margin:0;min-height:0}.chapter{max-width:none;margin:0;padding:0}.chapter-card{padding:0;border:0}.domain-label{font-size:9pt}.chapter h2{font-size:20pt;margin:3mm 0 4mm}.focus{margin:4mm 0;padding:2.5mm 3mm;border-left-width:1.2pt;break-inside:avoid}.tags,.completion{display:none}.translation{border-top:1px solid #000;padding-top:3mm}.translated-note{border:0!important;padding:0!important;background:transparent!important;font-size:10.5pt!important;line-height:1.55!important;overflow:visible!important}.translated-note h3{font-size:14pt!important;margin:5mm 0 2mm!important}.translated-note h4{font-size:12pt!important;margin:4mm 0 2mm!important}.translated-note h5{font-size:11pt!important;margin:3mm 0 1mm!important}.translated-note p{margin:2mm 0!important}.translated-note ul,.translated-note ol{margin:2mm 0!important}.translated-note li{margin:1mm 0!important}.translated-note a{color:#000!important;text-decoration:none!important}.translated-note code{padding:0!important;background:transparent!important;font-size:9pt!important}.translated-note .code-block{margin:3mm 0!important;padding:2.5mm!important;border:1px solid #777!important;border-radius:0!important;background:#fff!important;color:#000!important;white-space:pre-wrap!important;break-inside:avoid}.translated-table{margin:3mm 0!important;border-color:#777!important;border-radius:0!important;overflow:visible!important;break-inside:avoid}.translated-table table{min-width:0!important;font-size:8.5pt}.translated-table th,.translated-table td{padding:1.5mm!important;border-color:#777!important}.translated-table th{background:#fff!important;font-weight:700}.translated-note hr{border-color:#777!important;margin:4mm 0!important}}