:root{--paper:#efeadf;--panel:#f5f1e8;--line:#d9d2c4;--ink:#3f3a34;--ink-soft:#6e655a;--ink-strong:#221f1b;--surface-raised:#fffdf8;color:var(--ink);background:var(--paper);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:Charter,Iowan Old Style,Palatino Linotype,Book Antiqua,Palatino,Times New Roman,serif}:root[data-theme=dark]{--paper:#1e1b18;--panel:#292520;--line:#3c3630;--ink:#d6cfc2;--ink-soft:#aca294;--ink-strong:#f0e8dc;--surface-raised:#2f2a24;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--paper);color:var(--ink);line-height:1.52;transition:background-color .18s,color .18s}a{color:inherit}.app{width:min(1320px,100% - 2.5rem);margin:1.1rem auto 3rem}.site-header{z-index:40;border:1px solid var(--line);background:var(--panel);box-shadow:0 1px 0 color-mix(in srgb, var(--line) 72%, transparent);border-radius:12px;margin-bottom:1.2rem;padding:.8rem .9rem;position:sticky;top:0}.site-header h1{color:var(--ink-strong);margin:0;font-size:clamp(2rem,2.6vw,2.7rem);font-weight:600}.header-row{justify-content:space-between;align-items:flex-end;gap:.8rem;display:flex}.top-nav{flex-wrap:wrap;gap:.8rem;margin-top:.8rem;display:flex}.top-nav a{color:var(--ink);border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:.35rem .75rem;font-size:.95rem;text-decoration:none;transition:border-color .14s,color .14s,background-color .14s}.top-nav a.active,.top-nav-button.active{color:var(--ink-strong);border-color:color-mix(in srgb, var(--line) 35%, var(--ink) 65%);background:var(--surface-raised);font-weight:600}.top-nav-button{border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer;border-radius:999px;padding:.35rem .75rem;font-family:inherit;font-size:.95rem;transition:border-color .14s,color .14s,background-color .14s}.theme-switch{border:1px solid var(--line);background:var(--surface-raised);border-radius:999px;padding:.12rem;display:inline-flex}.theme-switch button{color:var(--ink);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:.3rem .65rem;font-family:inherit;font-size:.84rem}.theme-switch button.active{background:var(--panel);color:var(--ink-strong);font-weight:600}.landing,.auth-panel{border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:1.1rem}.landing h2,.auth-panel h2{color:var(--ink-strong);margin:0;font-size:1.3rem}.landing p,.auth-panel p{margin:.75rem 0 0}.landing-actions{margin-top:1rem}.landing-actions a,.auth-panel a{border:1px solid var(--line);color:var(--ink);background:var(--surface-raised);border-radius:8px;padding:.45rem .7rem;text-decoration:none;display:inline-block}.auth-panel form{gap:.65rem;max-width:420px;margin-top:.9rem;display:grid}.auth-panel label{color:var(--ink-strong);font-size:.92rem}.auth-panel input{border:1px solid var(--line);background:var(--surface-raised);color:var(--ink-strong);border-radius:8px;padding:.5rem .6rem;font-family:inherit;font-size:1rem}.auth-panel button{border:1px solid var(--line);background:var(--ink-strong);color:#fff;cursor:pointer;border-radius:8px;padding:.5rem .8rem;font-family:inherit;font-size:.95rem}.auth-panel button:disabled{opacity:.65;cursor:default}.layout{grid-template-columns:320px minmax(0,1fr);gap:1.5rem;display:grid}.chapter-nav{border:1px solid var(--line);background:var(--panel);border-radius:10px;align-self:start;padding:.75rem .8rem}.chapter-nav ol{margin:0;padding-left:1.3rem;list-style:decimal}.chapter-nav li+li{margin-top:.4rem}.chapter-nav a{color:var(--ink);border-bottom:1px solid #0000;line-height:1.3;text-decoration:none}.chapter-nav a:hover{border-bottom-color:var(--ink-soft)}.chapter-nav a.active{color:var(--ink-strong);font-weight:600}.chapter-content{border:1px solid var(--line);background:var(--panel);border-radius:10px;min-height:60vh;padding:clamp(1.1rem,2vw,2rem)}.chapter-content :first-child{margin-top:0}.chapter-content h1,.chapter-content h2,.chapter-content h3,.chapter-content h4{color:var(--ink-strong);font-weight:600}.chapter-content img{border:1px solid var(--line);background:#fff;border-radius:6px;max-width:100%;height:auto;margin:1rem 0 .5rem}.chapter-content table{border-collapse:collapse;width:100%;margin:1rem 0;font-size:.96rem}.chapter-content th,.chapter-content td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:.5rem .55rem}.chapter-main{flex-direction:column;gap:.8rem;display:flex}.chapter-pager{justify-content:space-between;gap:.6rem;display:flex}.chapter-pager a,.chapter-pager .disabled{border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:8px;max-width:48%;padding:.45rem .65rem;line-height:1.25;text-decoration:none}.chapter-pager a:last-child,.chapter-pager .disabled:last-child{text-align:right}.chapter-pager .disabled{color:var(--ink-soft)}.math-layout{grid-template-columns:300px minmax(0,1fr);gap:1rem;display:grid}.location-list{border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:.8rem}.location-list h2,.math-header h2,.movement h2{color:var(--ink-strong);margin:0;font-size:1.25rem}.location-list ul{margin:.8rem 0 0;padding:0;list-style:none}.location-list li+li{margin-top:.35rem}.location-list a{border:1px solid var(--line);color:var(--ink);background:var(--surface-raised);border-radius:8px;justify-content:space-between;gap:.5rem;padding:.45rem .55rem;text-decoration:none;display:flex}.location-list a.active{color:var(--ink-strong);border-color:#a89f90;font-weight:600}.location-list small{color:var(--ink-soft);font-size:.78rem}.math-charts{flex-direction:column;gap:1rem;display:flex}.math-header{border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:.8rem 1rem}.chart-card{border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:.8rem}.chart-card h3{color:var(--ink-strong);margin:0 0 .6rem;font-size:1rem}.chart-wrap{border:1px solid var(--line);background:var(--surface-raised);border-radius:8px;width:100%;height:360px;padding:.35rem}.movement{border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:1.1rem}.movement p{margin-top:.7rem}.movement-links{flex-wrap:wrap;gap:.6rem;margin-top:1rem;display:flex}.movement-links a{border:1px solid var(--line);color:var(--ink);background:var(--surface-raised);border-radius:8px;padding:.45rem .6rem;text-decoration:none}.muted{color:var(--ink-soft);margin:.4rem 0 0}.error{color:#9f2d2d}@media (width<=1080px){.layout,.math-layout{grid-template-columns:1fr}.site-header{border-radius:0;margin-inline:calc(50% - 50vw);padding-inline:max(.9rem,50vw - 50% + .9rem);top:0}.header-row{flex-direction:column;align-items:flex-start}.chapter-pager{flex-direction:column}.chapter-pager a,.chapter-pager .disabled{max-width:100%}}