:root{color-scheme:dark;--bg:#07090f;--panel:#101522;--panel2:#151d2d;--line:#27334a;--text:#eef3ff;--muted:#8d9bb3;--accent:#8e7bff;--cyan:#52ded1;--danger:#ff7185}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 20% 0,#18203b 0,transparent 34rem),var(--bg);color:var(--text);font:15px/1.6 Inter,ui-sans-serif,system-ui,sans-serif}.shell{max-width:1100px;margin:auto;padding:28px 18px;min-height:100vh}header{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;border-bottom:1px solid var(--line);padding-bottom:24px}.eyebrow{font-size:11px;letter-spacing:.18em;color:var(--cyan);margin:0 0 8px}h1{font-size:36px;line-height:1;margin:0 0 8px}h2{margin-top:0}.sub,.hint{color:var(--muted)}code{background:#0a0e17;border:1px solid var(--line);padding:2px 5px;border-radius:5px;font-family:ui-monospace,monospace}.actions{display:flex;gap:8px}.card{max-width:440px;margin:100px auto 0;background:rgba(16,21,34,.86);border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:0 20px 60px #0005}label{display:block;color:var(--muted);margin:16px 0 0}input,textarea{display:block;width:100%;margin-top:7px;background:#0b101b;color:var(--text);border:1px solid var(--line);border-radius:9px;padding:12px;font:inherit}button{background:linear-gradient(135deg,var(--accent),#5d8cff);color:white;border:0;border-radius:9px;padding:11px 17px;font-weight:700;cursor:pointer}button:disabled{opacity:.5;cursor:wait}.login button{margin-top:20px;width:100%}.secondary{background:var(--panel2);border:1px solid var(--line);font-size:12px}.hidden{display:none!important}.layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:18px;margin-top:25px}.history{border:1px solid var(--line);background:rgba(16,21,34,.8);border-radius:14px;padding:12px;height:calc(100vh - 180px);min-height:420px;overflow:auto}.history-head{display:flex;align-items:center;justify-content:space-between;margin:0 4px 10px}.history-head h3{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:0}.history-item{display:block;width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:left;background:transparent;color:var(--muted);border:1px solid transparent;border-radius:8px;padding:10px;font-size:13px;margin-bottom:4px}.history-item:hover,.history-item.active{background:var(--panel2);border-color:var(--line);color:var(--text)}.chat{min-width:0}.conversation-title{color:var(--muted);font-size:13px;margin:0 0 8px;padding:0 4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.messages{height:calc(100vh - 260px);min-height:380px;overflow:auto;padding:10px 0}.msg{max-width:88%;margin:0 0 18px;padding:15px 17px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.msg.user{margin-left:auto;background:#182442;border-color:#30446b}.role{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:5px}.msg.user .role{color:#bdafff}.body pre{overflow:auto;background:#080b12;border:1px solid var(--line);border-radius:8px;padding:12px;white-space:pre-wrap}.body pre code{background:transparent;border:0;padding:0}.composer{display:flex;gap:10px;align-items:flex-end}.composer textarea{resize:vertical}.composer button{height:48px;white-space:nowrap}.status{height:25px;color:var(--cyan);font-size:13px}.error{color:var(--danger);min-height:24px}.hint{font-size:12px}@media(max-width:650px){header{display:block}.actions{margin-top:18px}.layout{display:block}.history{height:auto;min-height:0;margin-bottom:15px;max-height:170px}.messages{height:calc(100vh - 450px);min-height:300px}.msg{max-width:96%}.composer{display:block}.composer button{width:100%;margin-top:8px}}