.chapter{max-width:var(--maxw);margin:0 auto;padding:0 20px 40px}.study-layout{position:relative}.chapter-section{scroll-margin-top:40px;padding-top:8px}.study-foot{max-width:var(--maxw);margin:40px auto 120px;color:var(--text-muted);font-size:.78rem;border-top:1px solid var(--grid);padding:14px 20px 0}.divider{margin:70px 0 8px;padding-bottom:10px;border-bottom:1px solid var(--grid)}.divider-num{color:var(--accent);font-weight:700;font-size:.9rem;letter-spacing:.1em}.divider h2{font-size:clamp(1.6rem,4vw,2.2rem);margin:2px 0 0}.chapnav{position:fixed;top:50%;left:24px;transform:translateY(-50%);display:none;flex-direction:column;gap:10px;z-index:20}.chapnav-item{display:flex;align-items:center;gap:10px;text-decoration:none;opacity:.55;transition:opacity .2s}.chapnav-item.is-active,.chapnav-item:hover{opacity:1}.chapnav-dot{width:9px;height:9px;border-radius:50%;background:var(--text-muted);flex:none;transition:background .2s,transform .2s}.chapnav-item.is-active .chapnav-dot{background:var(--accent);transform:scale(1.35)}.chapnav-label{font-size:.78rem;color:var(--text-secondary);white-space:nowrap}@media (min-width:1180px){.chapnav{display:flex}}.deck{position:fixed;inset:0;background:var(--page);display:flex;flex-direction:column}.deck-slide{flex:1 1;overflow-y:auto;display:flex;align-items:center;justify-content:center;padding:40px 20px 90px}.deck-slide-inner{width:100%;max-width:820px}.deck-cover{text-align:center;display:flex;flex-direction:column;gap:12px;align-items:center}.deck-cover h1{font-size:clamp(2.2rem,7vw,4rem);margin:0;line-height:1.05}.deck-cover p{color:var(--text-secondary);font-size:1.15rem;margin:0}.deck-cover .divider-num{font-size:1.1rem}.deck-bar{position:absolute;bottom:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 20px;background:color-mix(in srgb,var(--surface-1) 80%,transparent);border-top:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.deck-exit{color:var(--text-muted);text-decoration:none;font-size:.85rem}.deck-exit:hover{color:var(--text-primary)}.deck-progress{display:flex;gap:6px;flex:1 1;justify-content:center;flex-wrap:wrap;max-width:60%}.deck-tick{width:22px;height:4px;border-radius:2px;background:var(--grid);transition:background .2s}.deck-tick.is-active{background:var(--accent)}.deck-controls{display:flex;align-items:center;gap:10px;color:var(--text-secondary);font-size:.9rem}.deck-controls button{background:var(--surface-2);color:var(--text-primary);border:1px solid var(--border);border-radius:8px;width:34px;height:34px;font-size:1.1rem;cursor:pointer}.deck-controls button:disabled{opacity:.35;cursor:default}.deck-controls button:not(:disabled):hover{border-color:var(--accent)}.hero{min-height:78vh;display:flex;flex-direction:column;justify-content:center;gap:14px;padding:40px 0 60px}.hero .eyebrow{color:var(--accent);font-weight:600;letter-spacing:.04em;text-transform:uppercase;font-size:.8rem}.hero h1{font-size:clamp(2.1rem,6vw,3.6rem);line-height:1.05;margin:0}.hero p{color:var(--text-secondary);font-size:1.1rem;max-width:620px;margin:0}.hero .meta{display:flex;gap:26px;flex-wrap:wrap;margin-top:18px}.hero .meta div{display:flex;flex-direction:column}.hero .meta b{font-size:1.5rem}.hero .meta span{color:var(--text-muted);font-size:.85rem}.block{background:var(--surface-1);border:1px solid var(--border);border-radius:var(--radius);padding:26px 26px 20px;margin:26px 0}.block .kicker{color:var(--text-muted);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase}.block h3{margin:4px 0 2px;font-size:1.4rem}.block .source{color:var(--text-muted);font-size:.74rem;margin-top:16px;border-top:1px solid var(--grid);padding-top:10px}.narrative{border-left:3px solid var(--de-emphasis);background:var(--surface-2);padding:10px 14px;border-radius:0 8px 8px 0;color:var(--text-secondary);font-size:.95rem;margin:12px 0 20px}.narrative .tag{display:inline-block;color:var(--text-muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}.bars{display:flex;flex-direction:column;gap:8px;margin-top:14px}.bar-row{display:grid;grid-template-columns:150px 1fr auto;align-items:center;grid-gap:12px;gap:12px}.bar-row .name{color:var(--text-secondary);font-size:.88rem;text-align:right;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bar-track{height:22px;position:relative}.bar-fill{height:100%;border-radius:0 4px 4px 0}.bar-row .val{color:var(--text-primary);font-size:.85rem;min-width:46px;text-align:right}.legend{display:flex;gap:16px;flex-wrap:wrap;margin-top:14px}.legend .key{display:flex;align-items:center;gap:6px;color:var(--text-secondary);font-size:.82rem}.legend .swatch{width:12px;height:12px;border-radius:3px}.sig-table{width:100%;border-collapse:collapse;font-size:.86rem;margin-top:12px;min-width:520px}.sig-table td,.sig-table th{padding:8px 10px;text-align:right;border-bottom:1px solid var(--grid)}.sig-table td:first-child,.sig-table th:first-child{text-align:left;color:var(--text-secondary)}.sig-table thead th{color:var(--text-muted);font-weight:600}.sig-table sup{color:var(--accent);font-weight:700;margin-left:2px}.sig-note{color:var(--text-muted);font-size:.74rem;margin-top:8px}.meter{margin-top:18px}.meter .hero-num{font-size:3rem;font-weight:600;line-height:1}.meter .hero-num small{font-size:1rem;color:var(--text-muted);font-weight:400}.meter .track{height:14px;border-radius:8px;background:var(--surface-2);margin-top:14px;overflow:hidden}.meter .fill{height:100%;border-radius:8px}.meter .scale{display:flex;justify-content:space-between;color:var(--text-muted);font-size:.74rem;margin-top:6px}.edit-input{background:var(--surface-2);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);padding:8px 10px;font:inherit;width:100%}.edit-label{display:flex;flex-direction:column;gap:4px;color:var(--text-muted);font-size:.74rem}.btn{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:9px 16px;font:inherit;font-weight:600;cursor:pointer;margin-left:auto}.btn:hover{filter:brightness(1.08)}.btn-ghost{background:transparent;color:var(--accent);border:1px solid var(--accent);margin-left:0}.btn-ghost:hover{background:color-mix(in srgb,var(--accent) 12%,transparent);filter:none}.toolbar{display:flex;gap:14px;align-items:center;margin-top:10px;flex-wrap:wrap}.toolbar a:not(.btn){color:var(--accent);font-size:.9rem;text-decoration:none}.toolbar a:not(.btn):hover{text-decoration:underline}.toolbar a.btn,a.btn{color:#fff;text-decoration:none}.toolbar a.btn:hover{text-decoration:none}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:10px 20px;background:color-mix(in srgb,var(--surface-1) 85%,transparent);border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.topbar-brand{display:inline-flex;align-items:center;text-decoration:none}.topbar-logo{height:22px;width:auto;display:block}.brand-logo{height:40px;width:auto;display:block}.brand-logo-lg{height:clamp(34px,6vw,52px);width:auto;display:block}.topbar-actions{display:flex;align-items:center;gap:14px}.topbar-link{color:var(--text-secondary);font-size:.85rem;text-decoration:none;background:none;border:0;cursor:pointer;font:inherit;padding:0}.topbar-link:hover{color:var(--text-primary)}.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:360px;background:var(--surface-1);border:1px solid var(--border);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:12px}.home{max-width:720px;margin:0 auto;padding:12vh 20px}.home a.card{display:block;background:var(--surface-1);border:1px solid var(--border);border-radius:var(--radius);padding:22px;text-decoration:none;margin-top:20px}.home a.card:hover{border-color:var(--accent)}