:root{color-scheme:dark;--bg:#080b10;--surface:#0f141b;--surface-2:#151c25;--surface-3:#1d2632;--line:#2b3543;--line-soft:#1f2935;--text:#eef4fb;--muted:#9aa8b8;--muted-2:#718096;--accent:#43d9ad;--accent-2:#77a7ff;--danger:#ff6b6b;--warning:#f4c06a}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-panel{width:min(420px,100%);border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:28px}.brand-row{display:flex;align-items:center;gap:10px;margin-bottom:24px}.mark{display:grid;place-items:center;width:34px;height:34px;border-radius:8px;background:var(--accent);color:#05100c;font-weight:800}.brand-name{font-weight:700}.muted{color:var(--muted)}.auth-panel h1,.workspace-main h1{margin:0 0 10px;font-size:28px;line-height:1.15;letter-spacing:0}.auth-panel p,.workspace-main p{margin:0;color:var(--muted);line-height:1.55}.form{display:grid;grid-gap:14px;gap:14px;margin-top:24px}.field{display:grid;grid-gap:7px;gap:7px}.field span{color:var(--muted);font-size:13px}.input,.select,.textarea{width:100%;border:1px solid var(--line);border-radius:8px;background:#0a0f15;color:var(--text);outline:none}.input,.select{height:42px;padding:0 12px}.textarea{min-height:84px;max-height:220px;resize:vertical;padding:12px}.input:focus,.select:focus,.textarea:focus{border-color:var(--accent-2)}.button{height:42px;border:1px solid transparent;border-radius:8px;background:var(--accent);color:#04100c;font-weight:700}.button.secondary{background:transparent;color:var(--text);border-color:var(--line)}.button:disabled{opacity:.55;cursor:not-allowed}.error{color:var(--danger);font-size:13px}.auth-footer{margin-top:18px;color:var(--muted);font-size:14px}.auth-footer a{color:var(--accent-2)}.app-shell{min-height:100vh;display:grid;grid-template-columns:280px minmax(0,1fr);background:var(--bg)}.sidebar{border-right:1px solid var(--line-soft);background:#090d13;padding:18px;display:flex;flex-direction:column;gap:18px}.sidebar-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.nav{display:grid;grid-gap:6px;gap:6px}.nav-link{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:8px;color:var(--muted)}.nav-link.active,.nav-link:hover{background:var(--surface-2);color:var(--text)}.sidebar-section{display:grid;grid-gap:10px;gap:10px;min-height:0}.section-title{color:var(--muted-2);font-size:12px;font-weight:700;text-transform:uppercase}.conversation-list{display:grid;grid-gap:6px;gap:6px;overflow:auto}.conversation-item{width:100%;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted);text-align:left;padding:10px}.conversation-item.active,.conversation-item:hover{background:var(--surface-2);color:var(--text)}.main{min-width:0;display:flex;flex-direction:column}.topbar{height:64px;border-bottom:1px solid var(--line-soft);justify-content:space-between;padding:0 22px}.topbar,.topbar-actions{display:flex;align-items:center}.topbar-actions{gap:10px}.workspace-main{padding:28px}.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:14px;gap:14px;margin-top:24px}.metric{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:18px}.metric-value{margin-top:10px;font-size:28px;font-weight:800}.chat-layout{flex:1 1;min-height:0;display:grid;grid-template-rows:minmax(0,1fr) auto}.messages{overflow:auto;padding:28px;display:grid;align-content:start;grid-gap:18px;gap:18px}.message{display:grid;grid-gap:8px;gap:8px;max-width:860px}.message.user{justify-self:end}.message.assistant{justify-self:start}.message-role{color:var(--muted-2);font-size:12px;text-transform:uppercase}.bubble{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:14px 16px;white-space:pre-wrap;line-height:1.55}.message.user .bubble{background:var(--surface-3)}.composer{border-top:1px solid var(--line-soft);background:#090d13;padding:16px 22px;display:grid;grid-gap:12px;gap:12px}.composer-row{display:grid;grid-template-columns:minmax(0,1fr) 120px;grid-gap:12px;gap:12px}.model-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.model-row .select{width:min(320px,100%)}.empty{border:1px dashed var(--line);border-radius:8px;color:var(--muted);padding:28px;text-align:center}.provider-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:14px;gap:14px;margin-top:24px}.provider-card{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:18px;display:grid;grid-gap:16px;gap:16px}.model-row-line,.provider-actions,.provider-head,.switch-row{display:flex;align-items:center}.provider-head{justify-content:space-between;gap:12px}.provider-name{font-weight:800}.switch-row{gap:8px;color:var(--muted);font-size:14px}.provider-actions{gap:10px}.provider-actions .button{padding:0 14px}.subhead{margin:28px 0 12px;font-size:20px}.model-table{border:1px solid var(--line);border-radius:8px;overflow:hidden}.model-row-line{display:grid;grid-template-columns:150px 1fr 280px 120px;grid-gap:12px;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line-soft)}.model-row-line:last-child{border-bottom:0}.model-row-line code,.status-badge{color:var(--muted)}.status-badge{border:1px solid var(--line);border-radius:999px;padding:4px 8px;text-align:center}.status-badge.available{color:var(--accent)}.status-badge.disabled,.status-badge.needs_api_key{color:var(--warning)}@media (max-width:820px){.app-shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line-soft)}.composer-row,.metric-grid,.model-row-line,.provider-grid{grid-template-columns:1fr}}