:root{color-scheme:light;--bg:#f5f5f5;--surface:#fff;--surface-alt:#eef3f7;--border:#d7dfe7;--text:#253247;--muted:#59687a;--accent:#197f78;--link:#135e94;--radius:12px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:86px}body{margin:0;background:var(--bg);color:var(--text);line-height:1.65}a{color:var(--link)}button,select{font:inherit}.wrap{width:min(1160px,calc(100% - 40px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:10;background:#ffffffed;backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.topbar{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-size:1.04rem;white-space:nowrap}.brand-mark{display:grid;place-items:center;width:31px;height:31px;border-radius:7px;background:var(--accent);color:#fff;font-weight:900}.brand-suffix{font-size:.79rem;color:var(--muted);font-weight:500;border-left:1px solid var(--border);padding-left:10px}.head-actions{display:flex;align-items:center;gap:20px}.language-picker{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--muted)}select{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:7px;padding:7px 9px}.github-link{text-decoration:none;font-size:.9rem}
.page-shell{display:grid;grid-template-columns:220px minmax(0,1fr);gap:56px;padding-top:50px;padding-bottom:70px}.sidebar{position:sticky;top:105px;align-self:start}.sidebar-label,.eyebrow{font-size:.72rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:var(--accent)}.sidebar nav{margin-top:12px;display:grid;gap:3px}.sidebar nav a{display:block;border-left:2px solid transparent;padding:8px 12px;color:var(--muted);text-decoration:none;font-size:.91rem}.sidebar nav a:hover,.sidebar nav a:focus{background:var(--surface);color:var(--text);border-color:var(--accent);outline:none}.sidebar-note{font-size:.79rem;line-height:1.6;margin-top:28px;color:var(--muted);border-top:1px solid var(--border);padding-top:18px}
.main-content{min-width:0}.hero{padding:9px 0 30px}.hero h1{font-size:clamp(2.4rem,6vw,4.5rem);letter-spacing:-.055em;line-height:1.12;margin:10px 0 17px}.hero-text{font-size:1.08rem;color:var(--muted);max-width:720px;margin:0}.hero-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:27px}.button{display:inline-flex;align-items:center;min-height:43px;border-radius:8px;padding:8px 17px;text-decoration:none;font-weight:700;font-size:.91rem}.primary{background:var(--accent);color:#fff}.primary:hover{background:#126a64}.secondary{border:1px solid var(--border);color:var(--text)}.secondary:hover{border-color:var(--accent)}
.notice{background:#eaf3f2;border:1px solid #c7deda;border-left:3px solid var(--accent);padding:14px 17px;border-radius:9px;color:#3a5460;font-size:.9rem;margin:2px 0 32px}.guide-section{border-top:1px solid var(--border);padding:32px 0 15px;scroll-margin-top:82px}.section-kicker{font-size:.71rem;letter-spacing:.12em;color:var(--accent);font-weight:800}.guide-section h2{font-size:1.55rem;letter-spacing:-.025em;margin:5px 0 11px}.section-intro{color:var(--muted);margin:0 0 18px;max-width:740px}.chapter-content{max-width:760px}.subsection{padding:6px 0 15px}.subsection+.subsection{border-top:1px solid #e5e9ee;padding-top:19px}.subsection h3{font-size:1.04rem;margin:0 0 7px;color:var(--text)}.subsection p{font-size:.96rem;color:var(--muted);line-height:1.8;margin:0}.chapter-list{padding-left:1.4rem;margin:9px 0 16px;color:var(--muted)}.chapter-list li{margin:5px 0;line-height:1.75}.key{font-family:ui-monospace,Consolas,monospace;background:#e9eef5;color:#2a465d;padding:2px 6px;border-radius:4px}
.footer{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.79rem;color:var(--muted);margin-top:36px;padding-top:20px;border-top:1px solid var(--border)}
@media(max-width:880px){.page-shell{grid-template-columns:1fr;gap:23px;padding-top:25px}.sidebar{position:static}.sidebar nav{display:flex;overflow:auto;white-space:nowrap;margin-top:7px;padding-bottom:6px}.sidebar nav a{border-left:0;border-bottom:2px solid transparent;padding:7px 11px}.sidebar-note{display:none}}
@media(max-width:510px){.wrap{width:calc(100% - 28px)}.brand-suffix,.language-picker span,.github-link{display:none}.head-actions{gap:5px}.hero h1{font-size:2.45rem}.topbar{min-height:59px}}