:root{color-scheme:dark;--bg:#07111f;--panel:rgba(16,31,55,.78);--panel2:rgba(23,43,75,.92);--line:rgba(145,190,255,.18);--text:#eaf3ff;--muted:#94a9c7;--accent:#43b5ff;--accent2:#7cf7d4;--danger:#ff6b8a}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;background:radial-gradient(circle at top left,#123963 0,#07111f 36%,#030711 100%);color:var(--text);min-height:100vh}.shell{display:grid;grid-template-columns:310px 1fr;min-height:100vh}.sidebar{border-right:1px solid var(--line);background:rgba(3,8,18,.72);padding:24px;display:flex;flex-direction:column;gap:22px}.brand{display:flex;gap:13px;align-items:center}.mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;color:#001528;font-weight:900;box-shadow:0 0 24px rgba(67,181,255,.42)}.brand span{display:block;color:var(--muted);font-size:13px}.hint,.status{color:var(--muted);font-size:14px;line-height:1.45}.status{margin-top:auto;padding:12px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.04)}.main{display:grid;place-items:center;padding:24px}.card,.chat{width:min(980px,100%);border:1px solid var(--line);background:var(--panel);box-shadow:0 24px 80px rgba(0,0,0,.35),inset 0 1px rgba(255,255,255,.05);backdrop-filter:blur(18px);border-radius:28px}.login{max-width:430px;padding:34px;display:flex;flex-direction:column;gap:14px}.login h1,.chat h1{margin:0}.login p,.chat p{color:var(--muted);margin:.25rem 0 1rem}input,textarea{width:100%;border:1px solid var(--line);background:rgba(2,8,18,.72);color:var(--text);border-radius:16px;padding:14px 15px;font:inherit;outline:none}textarea{resize:vertical;min-height:76px}input:focus,textarea:focus{border-color:rgba(67,181,255,.78);box-shadow:0 0 0 4px rgba(67,181,255,.12)}button{border:0;border-radius:999px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#001528;font-weight:800;padding:13px 18px;cursor:pointer;box-shadow:0 12px 32px rgba(67,181,255,.26)}button:disabled{opacity:.55;cursor:not-allowed}.secondary,.ghost{background:rgba(255,255,255,.07);color:var(--text);box-shadow:none;border:1px solid var(--line)}.chat{height:min(860px,calc(100vh - 48px));display:grid;grid-template-rows:auto 1fr auto;overflow:hidden}.chat header{padding:22px 24px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;align-items:start;background:rgba(3,8,18,.25)}.messages{padding:24px;overflow:auto;display:flex;flex-direction:column;gap:16px}.msg{max-width:84%;padding:15px 17px;border:1px solid var(--line);border-radius:20px;line-height:1.5;white-space:pre-wrap}.msg.user{align-self:flex-end;background:linear-gradient(135deg,rgba(67,181,255,.24),rgba(124,247,212,.15));border-color:rgba(67,181,255,.34)}.msg.assistant{align-self:flex-start;background:rgba(255,255,255,.055)}.msg.system{align-self:center;color:var(--muted);background:rgba(255,255,255,.035);font-size:14px}.composer{border-top:1px solid var(--line);padding:18px;display:grid;grid-template-columns:1fr auto;gap:14px;background:rgba(3,8,18,.42)}.error{color:var(--danger);min-height:20px}.hidden{display:none!important}@media(max-width:800px){.shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line)}.main{padding:14px}.chat{height:calc(100vh - 210px);border-radius:22px}.composer{grid-template-columns:1fr}.msg{max-width:95%}}