:root{--background:#f5f5f1;--panel:#fff;--panel-muted:#eef1ec;--paper:#fbfbf7;--text:#1d211f;--muted:#626a62;--line:#d7ddd2;--accent:#24584d;--accent-strong:#123f36;--accent-soft:#dce9e3;--ink:#17231f;--blue:#2f5d8c;--gold:#9a6a1f;--warning:#8a5a15;--shadow:0 18px 45px rgba(28,35,31,.08)}*{box-sizing:border-box}body,html{min-height:100%}body{margin:0;background:linear-gradient(180deg,#f9f8f2 0,var(--background) 240px),var(--background);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;letter-spacing:0}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button{border:0}.app-shell{min-height:100vh;display:grid;grid-template-rows:auto 1fr}.topbar{height:62px;border-bottom:1px solid var(--line);background:rgba(255,255,252,.9);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);justify-content:space-between;padding:0 28px;position:-webkit-sticky;position:sticky;top:0;z-index:20}.brand,.topbar{display:flex;align-items:center}.brand{gap:10px;min-width:0}.brand-mark{width:34px;height:34px;border-radius:7px;display:grid;place-items:center;background:var(--ink);color:#fff;font-size:17px;font-weight:700}.brand-text{display:grid;grid-gap:1px;gap:1px;min-width:0}.brand-title{font-size:15px;font-weight:820;white-space:nowrap}.brand-subtitle{color:var(--muted);font-size:11px;font-weight:700;white-space:nowrap}.topnav{display:flex}.nav-link,.topnav{align-items:center;gap:8px}.nav-link{min-height:34px;display:inline-flex;color:var(--muted);padding:0 10px;border-radius:7px;font-size:14px}.nav-link:hover{color:var(--text);background:var(--panel-muted)}.nav-button{cursor:pointer}.main{width:min(1220px,calc(100vw - 40px));margin:0 auto;padding:28px 0 42px}.home-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.85fr);grid-gap:24px;gap:24px;align-items:start}.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}.input-panel{padding:24px}.home-intro{border:1px solid var(--line);border-radius:8px;background:rgba(255,255,252,.72);padding:28px;margin-bottom:16px}.auth-shell{min-height:calc(100vh - 140px);display:grid;place-items:start center;padding-top:36px}.auth-card{width:min(520px,100%);padding:24px}.section-kicker{color:var(--accent);font-size:13px;font-weight:700;margin:0 0 10px}.page-title{font-size:clamp(34px,5.5vw,60px);line-height:1.02;margin:0 0 14px;letter-spacing:0;max-width:760px}.page-copy{color:var(--muted);line-height:1.65;margin:0 0 22px;max-width:780px}.home-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px;margin-top:22px}.stat-item{min-height:86px;display:grid;align-content:center;grid-gap:5px;gap:5px;border:1px solid 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12px;margin-bottom:14px}.text-input{min-height:270px;resize:vertical;padding:14px;line-height:1.6}.text-input:focus,.title-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}.actions,.button{align-items:center}.button{min-height:40px;display:inline-flex;justify-content:center;gap:8px;border-radius:7px;padding:0 14px;font-size:14px;font-weight:700;cursor:pointer;transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease}.button:disabled{opacity:.6;cursor:not-allowed}.button-primary{background:var(--accent);color:#fff}.button-primary:hover:not(:disabled){background:var(--accent-strong)}.button-secondary{background:var(--panel-muted);color:var(--text);border:1px solid var(--line)}.button-secondary:hover:not(:disabled){background:#e7ebe3}.button-ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}.button-ghost:hover:not(:disabled){color:var(--text);background:var(--panel-muted)}.button-danger{background:#fbefeb;color:#923b26;border:1px solid #edc7bb}.button-danger:hover:not(:disabled){background:#f6dfd7}.status-text{color:var(--muted);font-size:13px}.error-text{color:#9b2c2c}.error-text,.success-text{font-size:13px;line-height:1.6}.success-text{color:#315c4c}.settings-shell{max-width:1040px;margin:0 auto}.settings-card{padding:24px}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:16px;gap:16px;margin-top:18px}.settings-section{border:1px solid var(--line);border-radius:8px;padding:16px;background:#fbfbf8}.inline-check{display:inline-flex;align-items:center;gap:8px;margin-top:10px;color:var(--muted);font-size:13px;line-height:1.5}.inline-check 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6px;font-size:14px;font-weight:750}.item-meta{margin:0;color:var(--muted);font-size:12px;line-height:1.5}.split-layout{display:grid;grid-template-columns:280px minmax(0,1fr);grid-gap:18px;gap:18px;align-items:start}.sidebar{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:14px;position:-webkit-sticky;position:sticky;top:82px}.sidebar-title{color:var(--muted);font-size:12px;font-weight:800;letter-spacing:0;margin:0 0 10px}.node-list{display:grid;grid-gap:8px;gap:8px}.node-button{width:100%;min-height:48px;display:grid;grid-template-columns:26px 1fr;align-items:center;grid-gap:9px;gap:9px;border-radius:7px;padding:8px 10px;color:var(--muted);background:transparent;text-align:left;cursor:pointer}.node-button:hover{background:var(--panel-muted);color:var(--text)}.node-button.active{background:var(--accent-soft);color:var(--accent-strong)}.node-index{width:26px;height:26px;border-radius:7px;display:grid;place-items:center;background:#fff;border:1px solid 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24px,1180px);padding-top:18px}.home-grid,.settings-grid,.split-layout{grid-template-columns:1fr}.home-intro{padding:22px}.auth-entry-panel{grid-template-columns:1fr}.sidebar{position:static}.node-list{grid-template-columns:repeat(2,minmax(0,1fr))}.viewer{padding:18px;min-height:0}.train-top,.viewer-head{display:grid}}@media (max-width:520px){.topbar{height:auto;min-height:62px;display:grid;grid-gap:8px;gap:8px;padding:12px}.topnav{overflow-x:auto;padding-bottom:2px}.brand-subtitle{display:none}.home-stats{grid-template-columns:1fr}.home-intro{padding:18px}.input-meta-row{display:grid}.node-list{grid-template-columns:1fr}.input-panel,.settings-card,.train-card{padding:16px}.page-title{font-size:34px}}