:root{--bg:#ffffff;--bg-soft:#f6f7f9;--bg-hover:#eef0f3;--fg:#17181c;--muted:#70757f;--border:#e4e6ea;--accent:#5b5bd6;--accent-hover:#4f4fc4;--accent-fg:#ffffff;--danger:#dc2626;--radius:12px;--radius-lg:18px;--sidebar-w:248px;--sidebar-w-collapsed:60px;--shadow:0 1px 3px rgba(20,20,40,0.07),0 4px 16px rgba(20,20,40,0.05)}@media (prefers-color-scheme:dark){:root{--bg:#131418;--bg-soft:#1b1d23;--bg-hover:#24262e;--fg:#e8e9ed;--muted:#9298a3;--border:#2c2f37;--accent:#7a7af0;--accent-hover:#8b8bf5;--shadow:0 1px 3px rgba(0,0,0,0.4)}}*{box-sizing:border-box}body,html{height:100%}body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;line-height:1.55;font-size:15px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1{font-size:24px;letter-spacing:-.02em}h2{font-size:18px;letter-spacing:-.01em}.shell{display:flex;height:100vh;overflow:hidden}.content{flex:1 1;min-width:0;overflow-y:auto;display:flex;flex-direction:column}.content>:not(.chat-wrap),.page{width:100%;max-width:1000px;margin:0 auto;padding:32px 28px 72px}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--bg-soft);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:14px 10px;gap:4px;transition:width .18s ease;overflow:hidden}.sidebar.collapsed{width:var(--sidebar-w-collapsed)}.sidebar-top{display:flex;align-items:center;justify-content:space-between;padding:2px 6px 14px}.sidebar .brand{font-weight:700;font-size:17px;color:var(--fg);letter-spacing:-.02em;white-space:nowrap}.sidebar .brand:hover{text-decoration:none}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;border-radius:8px;background:transparent;color:var(--muted);cursor:pointer;flex-shrink:0}.icon-btn:hover{background:var(--bg-hover);color:var(--fg)}.nav-item{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:10px;color:var(--fg);font-size:14px;white-space:nowrap;cursor:pointer;border:none;background:transparent;width:100%;text-align:left}.nav-item:hover{background:var(--bg-hover);text-decoration:none}.nav-item.active{background:var(--bg-hover);font-weight:600}.nav-item svg{flex-shrink:0;width:18px;height:18px;opacity:.75}.nav-item.primary{background:var(--accent);color:var(--accent-fg);font-weight:600;margin-bottom:10px}.nav-item.primary:hover{background:var(--accent-hover)}.nav-item.primary svg{opacity:1}.sidebar.collapsed .brand,.sidebar.collapsed .nav-label,.sidebar.collapsed .nav-section{display:none}.sidebar.collapsed .nav-item{justify-content:center;padding:9px 0}.nav-section{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:16px 10px 6px;white-space:nowrap}.sidebar-bottom{margin-top:auto;border-top:1px solid var(--border);padding-top:8px}.chat-list{overflow-y:auto;min-height:0}.chat-row{display:flex;align-items:center;border-radius:10px;padding-right:4px}.chat-row.active,.chat-row:hover{background:var(--bg-hover)}.chat-row-title{flex:1 1;min-width:0;padding:7px 10px;font-size:13.5px;color:var(--fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-row-title:hover{text-decoration:none}.chat-row.active .chat-row-title{font-weight:600}.chat-row-btn{display:none;align-items:center;justify-content:center;width:24px;height:24px;border:none;border-radius:6px;background:transparent;color:var(--muted);cursor:pointer;flex-shrink:0}.chat-row:hover .chat-row-btn{display:inline-flex}.chat-row-btn:hover{color:var(--fg);background:var(--border)}.chat-wrap{display:flex;flex-direction:column;height:100%}.chat-scroll{flex:1 1;overflow-y:auto}.chat-column{max-width:780px;margin:0 auto;padding:36px 20px 16px}.chat-hero{text-align:center;margin:12vh auto 0;max-width:560px}.chat-hero h1{font-size:30px;margin-bottom:8px}.chat-hero p{color:var(--muted);margin-top:0}.chip-row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:22px}.chip{border:1px solid var(--border);background:var(--bg);color:var(--fg);border-radius:999px;padding:8px 16px;font-size:13.5px;cursor:pointer}.chip:hover{background:var(--bg-hover);border-color:var(--muted)}.msg{margin-bottom:22px}.msg-user{display:flex;justify-content:flex-end}.msg-user .bubble{background:var(--accent);color:var(--accent-fg);border-radius:var(--radius-lg);border-bottom-right-radius:6px;padding:10px 16px;max-width:75%;white-space:pre-wrap}.msg-assistant .bubble{white-space:pre-wrap;padding:2px 0}.msg-images{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));grid-gap:10px;gap:10px;margin-top:12px}.msg-images a.card{box-shadow:none}.chat-inputbar{padding:10px 20px 22px}.chat-inputbar .inner{max-width:780px;margin:0 auto;display:flex;align-items:flex-end;gap:8px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius-lg);padding:10px 10px 10px 18px;box-shadow:var(--shadow)}.chat-inputbar textarea{flex:1 1;border:none;background:transparent;color:var(--fg);font:inherit;resize:none;outline:none;max-height:160px;padding:6px 0}.send-btn{width:38px;height:38px;border-radius:10px;border:none;background:var(--accent);color:var(--accent-fg);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}.send-btn:hover{background:var(--accent-hover)}.send-btn:disabled{opacity:.4;cursor:default}.chat-note{text-align:center;color:var(--muted);font-size:12px;margin:8px auto 0}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));grid-gap:16px;gap:16px}.card{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg);display:block;transition:transform .12s ease,box-shadow .12s ease}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);text-decoration:none}.card img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;background:var(--bg-soft)}.card .meta{padding:9px 12px;font-size:13.5px;color:var(--fg)}.btn{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:10px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-fg);font-size:14px;font-weight:500;cursor:pointer}.btn:hover{background:var(--accent-hover);text-decoration:none}.btn.secondary{background:transparent;color:var(--accent)}.btn.secondary:hover{background:var(--bg-hover)}.btn:disabled{opacity:.45;cursor:default}input,select,textarea{padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--fg);font-size:14px;width:100%}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}label{display:block;font-size:13px;color:var(--muted);margin:14px 0 5px}form.stack{max-width:420px}.error{color:var(--danger);font-size:14px}.muted{color:var(--muted)}table.plain{width:100%;border-collapse:collapse}table.plain td,table.plain th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);font-size:14px}main.page-legacy{max-width:1000px;margin:0 auto;padding:24px 16px 64px}