:root{--bg:#0f1720;--bg-elev:#16212e;--bg-elev2:#1d2b3a;--border:#27384a;--text:#e8eef4;--muted:#9fb0c0;--accent:#3aa17e;--accent-2:#2f6db0;--accent-warm:#c77d2e;--danger:#b03a3a;--radius:12px;--maxw:1100px;--font-sans:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--font-serif:Georgia,"Iowan Old Style","Times New Roman",serif}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-sans);line-height:1.55;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--maxw);margin:0 auto;padding:32px 24px 64px}.topbar{justify-content:space-between;gap:16px;padding:14px 24px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,var(--bg-elev),var(--bg));position:-webkit-sticky;position:sticky;top:0;z-index:30}.brand,.topbar{display:flex;align-items:center}.brand{gap:12px;font-weight:650;letter-spacing:.2px}.brand .dot{width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(58,161,126,.18)}.brand a{color:var(--text)}.topbar nav{display:flex;align-items:center;gap:18px;font-size:.92rem}.topbar nav a{color:var(--muted)}.topbar nav a:hover{color:var(--text);text-decoration:none}.logout-btn{background:transparent;color:var(--muted);border:1px solid var(--border);border-radius:8px;padding:6px 12px;font-size:.85rem;cursor:pointer}.logout-btn:hover{color:var(--text);border-color:var(--accent)}.hero h1{font-size:clamp(1.7rem,3.5vw,2.6rem);line-height:1.15;margin:8px 0 10px}.hero .sub{color:var(--muted);font-size:1.05rem;max-width:720px}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:.72rem;color:var(--accent);font-weight:700}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));grid-gap:20px;gap:20px;margin-top:36px}.card{display:block;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:22px;color:var(--text);transition:transform .12s ease,border-color .12s ease,background .12s ease}.card:hover{transform:translateY(-3px);border-color:var(--accent);background:var(--bg-elev2);text-decoration:none}.card .icon{font-size:1.6rem;margin-bottom:10px}.card h3{margin:0 0 8px;font-size:1.15rem}.card p{margin:0;color:var(--muted);font-size:.94rem}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(1200px 500px at 50% -10%,rgba(47,109,176,.18),transparent),var(--bg)}.login-card{width:100%;max-width:400px;background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;padding:34px 30px;box-shadow:0 24px 60px rgba(0,0,0,.35)}.login-card h1{margin:12px 0 6px;font-size:1.4rem}.login-card p.sub{color:var(--muted);margin:0 0 22px;font-size:.92rem}.field{display:block;margin-bottom:14px}.field label{display:block;font-size:.82rem;color:var(--muted);margin-bottom:6px}.field input{width:100%;padding:11px 13px;border-radius:9px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:1rem}.field input:focus{outline:none;border-color:var(--accent)}.btn{width:100%;padding:11px 14px;border-radius:9px;border:none;background:var(--accent);color:#062018;font-weight:700;font-size:1rem;cursor:pointer}.btn:hover{filter:brightness(1.06)}.error{color:#ffb4b4;background:rgba(176,58,58,.15);border:1px solid rgba(176,58,58,.4);padding:9px 12px;border-radius:8px;font-size:.88rem;margin-bottom:16px}.tool-page{display:flex;flex-direction:column;height:100vh}.tool-body{flex:1 1;min-height:0;position:relative}.frame{width:100%;height:100%;border:0;display:block;background:var(--bg)}.toolbar-inline{display:flex;align-items:center;gap:10px}.chip{background:var(--bg-elev2);border:1px solid var(--border);color:var(--muted);border-radius:8px;padding:6px 10px;font-size:.85rem;cursor:pointer}.chip:hover{color:var(--text);border-color:var(--accent)}.legend{display:flex;flex-wrap:wrap;gap:12px 18px;font-size:.8rem;color:var(--muted);padding:10px 24px;border-bottom:1px solid var(--border);background:var(--bg-elev)}.legend span{display:inline-flex;align-items:center;gap:6px}.swatch{width:11px;height:11px;border-radius:3px;display:inline-block}.mermaid-stage{flex:1 1;min-height:0;width:100%;overflow:hidden;cursor:-webkit-grab;cursor:grab;background:#0b1119}.mermaid-stage:active{cursor:-webkit-grabbing;cursor:grabbing}.mermaid-inner{transform-origin:0 0}.mermaid-inner svg{max-width:none!important;height:auto}.reader{display:grid;grid-template-columns:300px 1fr;height:100vh}.reader-side{border-right:1px solid var(--border);background:var(--bg-elev);overflow-y:auto;display:flex;flex-direction:column}.reader-side .side-head{padding:16px 18px;border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;background:var(--bg-elev);z-index:2}.reader-side .side-head a{color:var(--text);font-weight:650}.reader-search{width:100%;margin-top:10px;padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:.86rem}.toc{list-style:none;margin:0;padding:8px 0 40px}.toc .part-label{padding:14px 18px 6px;font-size:.68rem;letter-spacing:1.2px;text-transform:uppercase;color:var(--accent);font-weight:700}.toc a{display:block;padding:7px 18px;color:var(--muted);font-size:.9rem;border-left:3px solid transparent}.toc a:hover{text-decoration:none}.toc a.active,.toc a:hover{color:var(--text);background:var(--bg-elev2)}.toc a.active{border-left-color:var(--accent)}.reader-main{overflow-y:auto;position:relative}.reader-controls{position:-webkit-sticky;position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 20px;border-bottom:1px solid var(--border);background:rgba(15,23,32,.9);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.reader-controls .grp{display:flex;align-items:center;gap:8px}.progress-wrap{height:3px;background:var(--border)}.progress-bar{height:100%;background:var(--accent);width:0;transition:width .2s ease}.chapter{max-width:760px;margin:0 auto;padding:40px 28px 120px}.chapter.serif{font-family:var(--font-serif)}.chapter h1{font-size:1.9rem;line-height:1.2;margin:0 0 24px}.chapter h2{font-size:1.35rem;margin:34px 0 12px;border-bottom:1px solid var(--border);padding-bottom:6px}.chapter h3{font-size:1.1rem;margin:24px 0 8px;color:#d8e2ec}.chapter p{margin:0 0 16px}.chapter ol,.chapter ul{margin:0 0 16px;padding-left:24px}.chapter li{margin-bottom:6px}.chapter blockquote{margin:16px 0;padding:10px 16px;border-left:3px solid var(--accent-warm);background:var(--bg-elev);color:var(--muted);border-radius:0 8px 8px 0}.chapter strong{color:#fff}.chapter a{word-break:break-word}.chapter code{background:var(--bg-elev2);padding:1px 5px;border-radius:4px;font-size:.9em}.chapter hr{border:0;border-top:1px solid var(--border);margin:28px 0}.pager{display:flex;justify-content:space-between;gap:12px;max-width:760px;margin:0 auto;padding:0 28px 80px}.pager a{flex:1 1;padding:14px 16px;border:1px solid var(--border);border-radius:10px;background:var(--bg-elev);color:var(--text);font-size:.9rem}.pager a:hover{border-color:var(--accent);text-decoration:none;background:var(--bg-elev2)}.pager a.next{text-align:right}.pager a .lbl{display:block;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:1px;margin-bottom:3px}.search-results{position:absolute;inset:0;background:var(--bg);z-index:20;overflow-y:auto;padding:20px}.search-results h3{margin:4px 0 14px}.search-hit{display:block;padding:12px 14px;border:1px solid var(--border);border-radius:10px;margin-bottom:10px;color:var(--text)}.search-hit:hover{border-color:var(--accent);text-decoration:none;background:var(--bg-elev)}.search-hit .h-title{font-weight:650;margin-bottom:4px}.search-hit .h-part{color:var(--accent);font-size:.72rem;text-transform:uppercase;letter-spacing:1px}.search-hit .h-snippet{color:var(--muted);font-size:.88rem;margin-top:4px}.search-hit mark{background:rgba(199,125,46,.4);color:#fff;padding:0 2px;border-radius:3px}@media (max-width:820px){.reader{grid-template-columns:1fr}.reader-side{display:none}}