:root{--font-body:"Segoe UI","Helvetica Neue",Arial,sans-serif;--font-display:Georgia,"Times New Roman",serif;--font-mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;--bg:#f7f8fb;--surface:#ffffff;--surface-soft:#f3f5fb;--sidebar:#ffffff;--border:#e4e8f1;--text:#1d2738;--muted:#576179;--link:#3757d6;--accent:#2e4ac8;--code-bg:#eef2ff;--code-text:#1e2a5f;--shadow:0 16px 32px rgba(20,30,58,0.08)}:root[data-theme=dark]{--bg:#0f1118;--surface:#161a24;--surface-soft:#1c2231;--sidebar:#111621;--border:#2a3247;--text:#e8edf9;--muted:#a3aec6;--link:#90a7ff;--accent:#7d99ff;--code-bg:#111a33;--code-text:#d8e2ff;--shadow:0 20px 40px rgba(0,0,0,0.35)}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:var(--font-body),"Segoe UI",sans-serif;line-height:1.55}.docs-shell{min-height:100vh;display:grid;grid-template-columns:280px minmax(0,1fr)}.sidebar{position:-webkit-sticky;position:sticky;top:0;height:100vh;padding:1rem;background:var(--sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;gap:1rem}.brand-block{display:flex;align-items:center;gap:.75rem;text-decoration:none;color:inherit;padding:.5rem;border-radius:12px}.brand-block:hover{background:var(--surface-soft)}.logo-image{width:44px;height:44px;border-radius:10px;border:1px solid var(--border);object-fit:cover;background:#fff}.brand-title{margin:0;font-weight:700;font-size:.98rem;letter-spacing:.01em}.brand-subtitle{margin:0;color:var(--muted);font-size:.82rem}.sidebar-nav{display:flex;flex-direction:column;gap:.35rem}.sidebar-search{width:100%;border:1px solid var(--border);background:var(--surface-soft);color:var(--text);border-radius:10px;padding:.5rem .6rem;font-size:.88rem;margin-bottom:.15rem}.sidebar-search::placeholder{color:var(--muted)}.sidebar-nav a{text-decoration:none;color:var(--muted);border-radius:10px;padding:.48rem .62rem;font-size:.92rem;border:1px solid transparent}.sidebar-nav a:hover{border-color:var(--border)}.sidebar-nav a.active,.sidebar-nav a:hover{color:var(--text);background:var(--surface-soft)}.sidebar-nav a.active{border-color:var(--accent);font-weight:700}.main-frame{min-width:0;display:flex;flex-direction:column}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:10;height:62px;justify-content:space-between;padding:0 1.5rem;border-bottom:1px solid var(--border);background:var(--bg)}.topbar,.topbar-left{display:flex;align-items:center}.topbar-left{gap:.6rem;min-width:0}.topbar p{margin:0;color:var(--muted);font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.menu-btn{display:none;width:36px;height:36px;border-radius:10px;border:1px solid var(--border);background:var(--surface);align-items:center;justify-content:center;gap:4px;cursor:pointer;flex-shrink:0}.menu-btn span{width:14px;height:2px;border-radius:2px;background:var(--text)}.drawer-overlay{display:none}.back-to-top{position:fixed;right:1rem;bottom:1rem;z-index:35;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:999px;padding:.55rem .8rem;font-size:.82rem;font-weight:700;cursor:pointer;box-shadow:var(--shadow);opacity:0;transform:translateY(12px);pointer-events:none;transition:opacity .18s ease,transform .18s ease}.back-to-top.show{opacity:1;transform:translateY(0);pointer-events:auto}.theme-btn{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:10px;padding:.45rem .75rem;cursor:pointer;font-weight:600;font-size:.84rem}.theme-btn:hover{border-color:var(--accent)}.sidebar-theme{margin-top:auto}.top-theme{display:none}.content-frame{width:100%;max-width:1300px;margin:0 auto;padding:1.4rem;display:grid;grid-template-columns:minmax(0,1fr) 220px;grid-gap:1.2rem;gap:1.2rem}.content-column{min-width:0}.doc-section{background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);padding:1.2rem;margin-bottom:1rem}.kicker{margin:0 0 .45rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-size:.74rem;font-family:var(--font-mono),"Courier New",monospace}h1,h2,h3{font-family:var(--font-display),Georgia,serif;line-height:1.2}h1{margin:0;font-size:clamp(1.7rem,3.5vw,2.4rem)}h2{margin-bottom:.6rem;font-size:clamp(1.35rem,2.2vw,1.8rem)}h2,h3{margin-top:0}h3{margin-bottom:.25rem;font-size:1.02rem}.lead{margin-top:.55rem;margin-bottom:1rem;max-width:65ch}.doc-section>p,.lead{color:var(--muted)}.doc-section code{font-family:var(--font-mono),"Courier New",monospace;background:var(--code-bg);color:var(--code-text);border:1px solid var(--border);border-radius:7px;padding:.08rem .34rem}.section-figure{margin:0;border:1px solid var(--border);border-radius:12px;overflow:hidden;background:var(--surface-soft)}.section-image{width:100%;height:auto;display:block}.image-loader{position:relative;width:100%;overflow:hidden;background:var(--surface-soft)}.image-loader-image{position:relative;z-index:2;opacity:0;transition:opacity .22s ease}.image-loader.is-loaded .image-loader-image{opacity:1}.image-skeleton{position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(160,170,190,.18) 20%,rgba(160,170,190,.38) 50%,rgba(160,170,190,.18) 80%);background-size:220% 100%;animation:image-skeleton-shimmer 1.2s ease-in-out infinite}.image-loader.is-loaded .image-skeleton{opacity:0;pointer-events:none;transition:opacity .22s ease}@keyframes image-skeleton-shimmer{0%{background-position:200% 0}to{background-position:-20% 0}}.section-figure-mobile{width:min(100%,430px);margin-inline:auto}.section-image-mobile{width:100%;max-height:72vh;object-fit:contain;background:var(--surface-soft)}.section-figure figcaption{margin:0;padding:.58rem .75rem;font-size:.84rem;color:var(--muted);border-top:1px solid var(--border);background:var(--surface)}.feature-grid,.screen-grid{display:grid;grid-gap:.72rem;gap:.72rem;margin-bottom:.9rem}.feature-grid,.screen-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-card,.screen-card{background:var(--surface-soft);border:1px solid var(--border);border-radius:12px;padding:.75rem}.feature-card p,.screen-card p{margin:0;color:var(--muted)}.screen-card .section-figure{margin-top:.6rem}.screen-card .section-figure-mobile{width:min(100%,320px)}.tutorial-slideshow{margin-top:.35rem}.tutorial-slideshow-main{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-gap:.6rem;gap:.6rem;align-items:center}.tutorial-slide-btn{width:2.1rem;height:2.1rem;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:1.3rem;line-height:1;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}.tutorial-slide-btn:hover{border-color:var(--accent)}.tutorial-slide-figure{margin:0 auto;will-change:transform,opacity}.tutorial-slide-enter-next{animation:tutorial-slide-in-next .3s ease both}.tutorial-slide-enter-prev{animation:tutorial-slide-in-prev .3s ease both}@keyframes tutorial-slide-in-next{0%{opacity:0;transform:translateX(28px)}to{opacity:1;transform:translateX(0)}}@keyframes tutorial-slide-in-prev{0%{opacity:0;transform:translateX(-28px)}to{opacity:1;transform:translateX(0)}}.tutorial-slide-dots{margin-top:.65rem;display:flex;justify-content:center;gap:.35rem;flex-wrap:wrap}.tutorial-slide-dot{width:.64rem;height:.64rem;border-radius:999px;border:1px solid var(--border);background:transparent;cursor:pointer;padding:0}.tutorial-slide-dot.active{background:var(--accent);border-color:var(--accent)}@media (prefers-reduced-motion:reduce){.image-skeleton,.tutorial-slide-enter-next,.tutorial-slide-enter-prev{animation:none}}.tutorial-list{margin:.9rem 0 0;padding-left:1.2rem;display:grid;grid-gap:.7rem;gap:.7rem}.priority-list,.tips-list{margin:.9rem 0 .95rem;padding-left:1.2rem;display:grid;grid-gap:.48rem;gap:.48rem;color:var(--muted)}.priority-list li,.tips-list li{line-height:1.45}.tutorial-list li{border:1px solid var(--border);border-radius:10px;background:var(--surface-soft);padding:.7rem}.tutorial-list li p{margin:0;color:var(--muted)}pre{margin:.5rem 0 0;border-radius:9px;background:var(--code-bg);color:var(--code-text);padding:.6rem .7rem;overflow-x:auto;font-family:var(--font-mono),"Courier New",monospace;font-size:.84rem}.toc,pre{border:1px solid var(--border)}.toc{position:-webkit-sticky;position:sticky;top:78px;align-self:start;border-radius:12px;background:var(--surface);box-shadow:var(--shadow);padding:.75rem;display:flex;flex-direction:column;gap:.2rem}.toc p{margin:0 0 .4rem;font-size:.82rem;text-transform:uppercase;letter-spacing:.06em}.toc a,.toc p{color:var(--muted)}.toc a{text-decoration:none;padding:.34rem .44rem;border-radius:8px;font-size:.88rem}.toc a.active,.toc a:hover{background:var(--surface-soft);color:var(--text)}.toc a.active{font-weight:700}@media (max-width:1160px){.content-frame{grid-template-columns:minmax(0,1fr)}.toc{display:none}}@media (max-width:920px){.docs-shell{grid-template-columns:1fr}.sidebar{position:fixed;top:0;left:0;width:min(82vw,320px);height:100vh;border-right:1px solid var(--border);border-bottom:none;padding:.9rem;gap:.7rem;z-index:45;transform:translateX(-104%);transition:transform .22s ease;overflow-y:auto}.sidebar.sidebar-open{transform:translateX(0)}.drawer-overlay{display:block;position:fixed;inset:0;background:rgba(5,10,20,.5);z-index:40;opacity:0;visibility:hidden;pointer-events:none;border:0;padding:0;margin:0;transition:opacity .2s ease,visibility .2s ease}.drawer-overlay.show{opacity:1;visibility:visible;pointer-events:auto}.sidebar-nav{display:flex;flex-direction:column;gap:.35rem}.sidebar-theme{display:none}.menu-btn,.top-theme{display:inline-flex}.topbar{padding:0 .95rem}.content-frame{padding:.95rem}.feature-grid,.screen-grid{grid-template-columns:1fr}}@media (max-width:640px){.sidebar-search{margin-bottom:.4rem}.doc-section{padding:.9rem}.section-figure-mobile{width:min(100%,340px)}.screen-card .section-figure-mobile{width:min(100%,280px)}.tutorial-slideshow-main{grid-template-columns:1fr;gap:.55rem}.tutorial-slide-btn{justify-self:center}}