:root{color-scheme:dark;--bg:#0f1419;--card:#1a2330;--text:#f4f7fb;--muted:#9aadc2;--accent:#7ee0c5;--danger:#f07178;--border:color-mix(in srgb,white 10%,transparent)}*{box-sizing:border-box;margin:0;padding:0}body,html{min-height:100%}body{font-family:Segoe UI,system-ui,sans-serif;background:radial-gradient(circle at top,#1d3a4d 0,transparent 45%),var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}.shell{width:min(960px,calc(100% - 32px));margin:0 auto;padding:28px 0 64px}.shell-wide{width:min(1180px,calc(100% - 32px))}.nav{display:flex;gap:16px;align-items:center;margin-bottom:28px}.nav strong{margin-right:auto}.card{background:color-mix(in srgb,var(--card) 88%,transparent);border:1px solid var(--border);border-radius:20px;padding:28px;box-shadow:0 24px 60px rgba(0,0,0,.35)}.eyebrow{color:var(--accent);font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;font-weight:600;margin-bottom:8px}h1{font-size:clamp(1.8rem,4vw,2.4rem);margin-bottom:10px}h2{font-size:1.35rem;margin-bottom:8px}.lede,.muted{color:var(--muted);line-height:1.55}.form{grid-gap:12px;gap:12px;margin-top:20px}.form,label{display:grid}label{grid-gap:6px;gap:6px;font-size:.9rem}input,textarea{background:#101820;border:1px solid var(--border);color:var(--text);border-radius:10px;padding:10px 12px;font:inherit}button{background:var(--accent);color:#0c1412;border:0;border-radius:10px;padding:10px 14px;font:inherit;font-weight:600;cursor:pointer}button.secondary{background:transparent;color:var(--text);border:1px solid var(--border)}button.danger{background:var(--danger);color:#1a0c0e}button:disabled,input:disabled,textarea:disabled{opacity:.65;cursor:default}.error{color:var(--danger);margin-top:8px}.grid{display:grid;grid-gap:16px;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:20px}.stat dt{color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px}.messages{display:grid;grid-gap:12px;gap:12px;min-height:280px;max-height:55vh;overflow:auto;margin:16px 0}.bubble{padding:12px 14px;border-radius:14px;line-height:1.5;white-space:pre-wrap}.bubble.user{background:#243044;margin-left:12%}.bubble.assistant{background:#1e2d38;border:1px solid var(--border);margin-right:12%}.row{display:flex;gap:8px}.chat-main h1{font-size:clamp(1.4rem,3vw,2rem);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.row textarea{flex:1 1;min-height:72px;resize:vertical}.chat-layout{display:grid;grid-template-columns:minmax(220px,280px) 1fr;grid-gap:16px;gap:16px;align-items:start}.chat-main{min-width:0}.chat-sidebar{padding:18px;position:-webkit-sticky;position:sticky;top:16px}.chat-sidebar-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}.chat-sidebar-head .eyebrow{margin-bottom:0}.chat-new{display:inline-flex;align-items:center;background:var(--accent);color:#0c1412;border-radius:8px;padding:6px 10px;font-size:.8rem;font-weight:600}.chat-new.active{box-shadow:0 0 0 1px color-mix(in srgb,white 35%,transparent)}.chat-list{display:grid;grid-gap:6px;gap:6px;max-height:min(70vh,640px);overflow:auto}.chat-item{display:grid;grid-template-columns:1fr auto;align-items:start;grid-gap:4px;gap:4px;border-radius:12px;border:1px solid transparent;background:#101820}.chat-item.active{border-color:color-mix(in srgb,var(--accent) 45%,transparent);background:#243044}.chat-item a{color:var(--text);display:grid;grid-gap:2px;gap:2px;padding:10px 10px 10px 12px;min-width:0}.chat-item-preview,.chat-item-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-item-title{font-size:.9rem;font-weight:600}.chat-item-meta,.chat-item-preview{color:var(--muted);font-size:.75rem}.chat-item-delete{background:transparent;color:var(--muted);border:0;padding:8px 10px;font-size:1.1rem;line-height:1}.chat-item-delete:hover{color:var(--danger)}.chat-sidebar.is-busy .chat-new,.chat-sidebar.is-busy a{pointer-events:none}.chat-home-list{display:grid;grid-gap:8px;gap:8px;margin-top:16px}.chat-home-list a{display:grid;grid-gap:2px;gap:2px;color:var(--text);background:#101820;border:1px solid var(--border);border-radius:12px;padding:12px 14px}.chat-home-list a:hover{border-color:color-mix(in srgb,var(--accent) 45%,transparent)}.chat-home-list .muted{font-size:.85rem}.steps{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:20px 0 8px}.steps li{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.85rem}.steps li span{width:1.6rem;height:1.6rem;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);font-weight:600}.steps li.active,.steps li.done{color:var(--text)}.steps li.active span,.steps li.done span{background:var(--accent);color:#0c1412;border-color:transparent}.preset-row{display:flex;flex-wrap:wrap;gap:8px}.choice{display:flex;align-items:center;gap:10px;background:#101820;border:1px solid var(--border);border-radius:12px;padding:12px 14px}.choice input{width:auto;accent-color:var(--accent)}.connect-grid{display:grid;grid-gap:10px;gap:10px}.connect-card{display:grid;grid-gap:8px;gap:8px;background:#101820;border:1px solid var(--border);border-radius:14px;padding:16px;text-align:left}.connect-card.active{border-color:color-mix(in srgb,var(--accent) 55%,transparent)}.connect-card h3{font-size:1.05rem}.connect-card .muted{font-size:.9rem}details.advanced{margin-top:8px;color:var(--muted)}details.advanced summary{cursor:pointer;margin-bottom:10px}select{background:#101820;border:1px solid var(--border);color:var(--text);border-radius:10px;padding:10px 12px;font:inherit}@media (max-width:800px){.chat-layout{grid-template-columns:1fr}.chat-sidebar{position:static}.chat-list{max-height:220px}}