:root{--ink: #0F172A;--ink-soft: #334155;--amber: #F59E0B;--amber-strong: #FEA619;--amber-ink: #684000;--bg: #F8FAFC;--surface: #FFFFFF;--surface-soft: #F1F5F9;--border: #E2E8F0;--muted: #64748B;--muted-2: #94A3B8;--sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono: "JetBrains Mono", "SF Mono", Monaco, monospace;--r-lg: 12px;--r-md: 8px;--shadow-1: 0 4px 12px rgba(15, 23, 42, .05);--shadow-2: 0 8px 24px rgba(15, 23, 42, .08)}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;font-size:16px}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}input,textarea,select{width:100%;padding:.6rem .85rem;border:1px solid var(--border);border-radius:var(--r-md);font:inherit;font-size:.95rem;background:var(--surface);color:var(--ink)}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 2px #0f172a14}label{display:block;font-size:.72rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.35rem}.btn{display:inline-flex;align-items:center;gap:.45rem;background:var(--ink);color:#fff;border:none;padding:.65rem 1.2rem;border-radius:var(--r-lg);font-size:.92rem;font-weight:600;transition:opacity .15s}.btn:hover{opacity:.88}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.secondary{background:transparent;color:var(--ink);border:1px solid var(--ink)}.btn.secondary:hover{background:var(--surface-soft);opacity:1}.btn.ghost{background:var(--surface-soft);color:var(--muted)}.btn.ghost:hover{background:var(--border);color:var(--ink);opacity:1}.btn.amber{background:var(--amber);color:var(--amber-ink)}.btn.danger{background:#dc2626;color:#fff}.btn.small{padding:.35rem .8rem;font-size:.8rem;border-radius:var(--r-md)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-1);padding:1.25rem}.muted{color:var(--muted)}.small{font-size:.82rem}.mono{font-family:var(--mono)}.error-text{color:#dc2626;font-size:.85rem;margin-top:.5rem}.ok-text{color:#16a34a;font-size:.85rem;margin-top:.5rem}.topbar{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}.topbar .inner{max-width:1280px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;gap:1.75rem}.brand{font-weight:700;font-size:1.3rem;letter-spacing:-.01em;color:var(--ink);display:flex;align-items:center;gap:.5rem}.brand .mark{width:28px;height:28px;border-radius:8px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:.85rem}.nav{display:flex;gap:.4rem;align-items:center}.nav a{padding:.4rem .75rem;border-radius:6px;font-size:.92rem;font-weight:500;color:var(--muted);transition:.15s}.nav a:hover{color:var(--ink);background:var(--surface-soft)}.nav a.router-link-active{color:var(--ink);border-bottom:2px solid var(--ink);padding-bottom:.3rem;border-radius:0;background:none}.topbar .icons{display:flex;align-items:center;gap:.3rem}.icon-btn{background:none;border:none;color:var(--muted);padding:.45rem;border-radius:999px;font-size:1.05rem}.icon-btn:hover{color:var(--ink);background:var(--surface-soft)}.avatar{width:32px;height:32px;border-radius:999px;background:var(--surface-soft);border:1px solid var(--border);display:grid;place-items:center;font-size:.8rem;font-weight:700;color:var(--muted)}.page{max-width:1280px;margin:0 auto;padding:2rem 24px 4rem}.page h1{font-size:1.6rem;letter-spacing:-.02em;margin-bottom:.4rem}.page .sub{color:var(--muted);margin-bottom:1.5rem}.login-wrap{min-height:100vh;display:grid;place-items:center;background:var(--bg)}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-2);padding:2.4rem;width:380px}.login-logo{font-size:2.4rem;text-align:center}.login-card h1{text-align:center;font-size:1.35rem;margin:.6rem 0 .3rem;letter-spacing:-.02em}.login-card .btn{width:100%;margin-top:1rem}.chip{display:inline-flex;align-items:center;gap:.35rem;padding:.15rem .55rem;border-radius:4px;background:var(--surface-soft);color:var(--muted);font-family:var(--mono);font-size:.68rem;font-weight:500;text-transform:uppercase;letter-spacing:.05em}.badge{display:inline-flex;padding:.15rem .55rem;border-radius:999px;font-size:.7rem;font-weight:700;text-transform:uppercase}.badge.done{background:#dcfce7;color:#15803d}.badge.generating{background:#fef3c7;color:#b45309}.badge.error{background:#fee2e2;color:#b91c1c}.course-row{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.1rem 0;border-bottom:1px solid var(--border);flex-wrap:wrap}.course-row:last-child{border-bottom:none}.course-row .title{font-weight:600;font-size:1rem}.workspace{display:flex;height:calc(100vh - 64px);overflow:hidden}.toc{width:264px;background:var(--surface-soft);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto;flex-shrink:0}.toc .inner{padding:24px}.toc h4{font-family:var(--mono);font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:1.2rem 0 .5rem}.toc h4:first-child{margin-top:0}.toc .mod{display:flex;align-items:center;gap:.5rem;padding:.4rem .6rem;border-radius:var(--r-md);font-weight:600;font-size:.9rem;cursor:pointer;color:var(--muted)}.toc .mod:hover{color:var(--ink);background:var(--surface)}.toc .mod.active{color:var(--ink)}.toc .mod .chev{font-size:.8rem;transition:transform .15s}.toc .mod.open .chev{transform:rotate(90deg)}.toc .mod-grp{margin:.2rem 0 .6rem .8rem;border-left:1px solid var(--border);padding-left:.6rem}.toc .l{display:flex;align-items:baseline;gap:.45rem;padding:.35rem .6rem;border-radius:var(--r-md);font-size:.88rem;cursor:pointer;color:var(--muted)}.toc .l:hover{background:var(--surface);color:var(--ink)}.toc .l.active{background:var(--amber-strong);color:var(--amber-ink);font-weight:600}.toc .l .n{font-family:var(--mono);font-size:.68rem;color:inherit;opacity:.7}.toc .c{display:flex;align-items:baseline;gap:.45rem;padding:.3rem .6rem .3rem 1.5rem;border-radius:var(--r-md);font-size:.85rem;cursor:pointer;color:var(--muted)}.toc .c:hover{background:var(--surface);color:var(--ink)}.toc .c.active{background:var(--amber-strong);color:var(--amber-ink);font-weight:600}.toc .c .n{font-family:var(--mono);font-size:.66rem;opacity:.7}.toc .quick{margin-top:auto;padding:16px;border-top:1px solid var(--border);background:var(--surface-soft);display:flex;flex-direction:column;gap:.5rem}.toc .quick .btn{width:100%;justify-content:center;font-size:.85rem;padding:.55rem}.content{flex:1;overflow-y:auto;background:var(--surface)}.content .scroll{max-width:760px;margin:0 auto;padding:40px 48px 80px}.breadcrumbs{display:flex;align-items:center;gap:.4rem;font-family:var(--mono);font-size:.72rem;color:var(--muted);margin-bottom:2rem;flex-wrap:wrap}.breadcrumbs .sep{opacity:.5}.breadcrumbs .cur{color:var(--ink);font-weight:600}.head-meta{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}.head-meta .chip{background:var(--surface-soft)}.head-meta .meta{display:flex;align-items:center;gap:.35rem;font-family:var(--mono);font-size:.7rem;color:var(--muted)}h1.headline{font-size:2.4rem;font-weight:700;letter-spacing:-.02em;line-height:1.15;margin-bottom:1rem}.lead{font-size:1.12rem;color:var(--muted);line-height:1.65;margin-bottom:2.5rem;border-bottom:1px solid var(--border);padding-bottom:2rem}.md h2{font-size:1.45rem;font-weight:600;letter-spacing:-.01em;margin:2.2rem 0 .8rem}.md h3{font-size:1.15rem;font-weight:600;margin:1.5rem 0 .6rem}.md p{margin:.8rem 0;color:var(--ink)}.md ul,.md ol{margin:.6rem 0 .6rem 1.4rem}.md li{margin:.3rem 0}.md code{background:var(--surface-soft);padding:.15rem .4rem;border-radius:5px;font-family:var(--mono);font-size:.85em}.md pre{background:#0f172a;color:#e2e8f0;padding:1.1rem 1.2rem;border-radius:var(--r-lg);overflow-x:auto;margin:1rem 0;box-shadow:var(--shadow-1)}.md pre code{background:none;padding:0;color:inherit;font-size:.82rem}.md blockquote{border-left:3px solid var(--amber);padding-left:1rem;color:var(--muted);margin:1rem 0}.md table{border-collapse:collapse;width:100%;margin:1rem 0;font-size:.9rem}.md th,.md td{border:1px solid var(--border);padding:.5rem .75rem;text-align:left}.md th{background:var(--surface-soft);font-weight:600}.callout{display:flex;gap:.9rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--r-lg);padding:1.1rem 1.2rem;margin:1.5rem 0;box-shadow:var(--shadow-1)}.callout .ico{color:var(--amber);font-size:1.2rem;line-height:1.4}.callout h4{font-size:.95rem;font-weight:600;margin-bottom:.25rem}.callout p{font-size:.92rem;color:var(--muted);margin:0}.callout.amber{background:#fffbeb;border-color:#fde68a}.callout.amber .ico{color:var(--amber-strong)}.prompt-box{background:#fffbeb;border:1px solid #FDE68A;border-radius:var(--r-lg);padding:1rem 1.15rem;margin-top:1.5rem}.prompt-box .lbl{font-family:var(--mono);font-size:.68rem;font-weight:500;text-transform:uppercase;letter-spacing:.06em;color:var(--amber-ink);margin-bottom:.4rem;display:flex;align-items:center;gap:.4rem}.prompt-box ul{margin-left:1.1rem}.prompt-box li{font-size:.9rem;margin:.3rem 0}.next{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--border)}.next h3{font-size:1.2rem;font-weight:600;margin-bottom:1rem}.next-row{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1rem 1.1rem;background:var(--surface-soft);border-radius:var(--r-lg);margin-bottom:.6rem;transition:.15s;cursor:pointer}.next-row:hover{background:var(--surface);box-shadow:var(--shadow-1);border:1px solid var(--border)}.next-row .ic{width:34px;height:34px;border-radius:999px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:.95rem;flex-shrink:0}.next-row .ic.amber{background:var(--amber-strong);color:var(--amber-ink)}.next-row .t{font-weight:600;font-size:.95rem}.next-row .d{font-family:var(--mono);font-size:.7rem;color:var(--muted)}.next-row .act{color:var(--amber);background:#f59e0b1f;padding:.4rem .8rem;border-radius:var(--r-md);font-size:.85rem;font-weight:500;opacity:0;transition:.15s;white-space:nowrap}.next-row:hover .act{opacity:1}.chat{width:320px;background:var(--surface);border-left:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.chat-head{padding:1rem 1.1rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.75rem}.chat-head .ic{width:32px;height:32px;border-radius:999px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:.95rem}.chat-head h2{font-size:.95rem;font-weight:600;line-height:1.2}.chat-head .st{font-family:var(--mono);font-size:.66rem;color:var(--muted);display:flex;align-items:center;gap:.35rem}.chat-head .dot{width:7px;height:7px;border-radius:999px;background:#22c55e;display:block}.chat-msgs{flex:1;overflow-y:auto;padding:1.1rem;background:var(--bg);display:flex;flex-direction:column;gap:1.1rem}.msg .who{font-family:var(--mono);font-size:.66rem;color:var(--muted);display:flex;align-items:center;gap:.35rem;margin-bottom:.35rem}.msg.user .who{justify-content:flex-end}.msg .bubble{font-size:.88rem;line-height:1.55}.msg.ai .bubble{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);border-top-left-radius:4px;box-shadow:var(--shadow-1);padding:.75rem .9rem;color:var(--ink)}.msg.user .bubble{background:var(--ink);color:#fff;border-radius:var(--r-lg);border-top-right-radius:4px;padding:.75rem .9rem}.chat-input{padding:.9rem 1.1rem;border-top:1px solid var(--border);background:var(--surface)}.chat-input .field{display:flex;align-items:center;background:var(--surface-soft);border-radius:999px;padding:.15rem .15rem .15rem 1rem}.chat-input input{border:none;background:none;padding:.5rem 0;font-size:.88rem}.chat-input input:focus{box-shadow:none}.chat-input .send{background:var(--ink);color:#fff;border:none;width:32px;height:32px;border-radius:999px;display:grid;place-items:center;flex-shrink:0}.chat-input .quick{display:flex;gap:.45rem;margin-top:.6rem}.chat-input .quick button{font-family:var(--mono);font-size:.66rem;color:var(--muted);background:var(--surface-soft);border:none;padding:.3rem .6rem;border-radius:4px}.chat-input .quick button:hover{color:var(--ink);background:var(--border)}.progress-line{display:flex;align-items:center;gap:.6rem;color:var(--muted);font-size:.9rem;margin-top:1rem}.spinner{width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--ink);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.mt-2{margin-top:1.2rem}@media(max-width:1000px){.chat{display:none}}@media(max-width:820px){.toc{display:none}.content .scroll{padding:24px 20px 60px}h1.headline{font-size:1.8rem}.form-grid{grid-template-columns:1fr}.topbar .nav{display:none}}