:root{--bg: #0f172a;--bg-elevated: #1e293b;--bg-elevated-2: #334155;--fg: #f1f5f9;--fg-dim: #94a3b8;--accent: #22d3ee;--accent-dim: #0891b2;--danger: #f87171;--warn: #fbbf24;--success: #34d399;--border: #334155;--radius: 12px;--shadow: 0 4px 16px rgba(0, 0, 0, .4)}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}button{font-family:inherit;font-size:inherit;background:var(--accent);color:var(--bg);border:none;border-radius:var(--radius);padding:10px 16px;cursor:pointer;font-weight:600;min-height:44px}button:disabled{background:var(--bg-elevated-2);color:var(--fg-dim);cursor:not-allowed}button.ghost{background:transparent;color:var(--fg);border:1px solid var(--border)}input,textarea{font-family:inherit;font-size:16px;background:var(--bg-elevated);color:var(--fg);border:1px solid var(--border);border-radius:var(--radius);padding:10px 14px;width:100%}textarea{resize:none;min-height:44px;max-height:200px}.app{display:flex;flex-direction:column;height:100%;max-width:720px;margin:0 auto}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--bg-elevated)}.app-header h1{margin:0;font-size:18px}.app-main{flex:1;overflow-y:auto;padding:16px}.app-footer{padding:12px 16px;border-top:1px solid var(--border);background:var(--bg-elevated)}.chat-input{display:flex;gap:8px;align-items:flex-end}.chat-input textarea{flex:1}.message{margin-bottom:12px;padding:10px 14px;border-radius:var(--radius);max-width:85%;word-wrap:break-word;white-space:pre-wrap}.message.user{background:var(--accent);color:var(--bg);align-self:flex-end;margin-left:auto}.message.assistant{background:var(--bg-elevated);color:var(--fg);align-self:flex-start}.message.system{background:var(--bg-elevated-2);color:var(--fg-dim);font-style:italic;font-size:14px;text-align:center;max-width:100%}.message.queued:after{content:" · queued";color:var(--warn);font-size:12px;margin-left:6px}.message.queued{opacity:.85;border:1px dashed var(--warn)}.session-list{display:flex;flex-direction:column;gap:8px}.session-card{background:var(--bg-elevated);padding:12px 16px;border-radius:var(--radius);cursor:pointer;border:1px solid var(--border)}.session-card h3{margin:0 0 4px;font-size:16px}.session-card .meta{color:var(--fg-dim);font-size:13px}.status-bar{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--fg-dim)}.status-dot{width:8px;height:8px;border-radius:50%}.status-dot.online{background:var(--success)}.status-dot.offline{background:var(--warn)}.auth-form{max-width:360px;margin:64px auto;padding:24px;background:var(--bg-elevated);border-radius:var(--radius);display:flex;flex-direction:column;gap:12px}.auth-form h2{margin:0 0 8px}.error{color:var(--danger);font-size:14px}.spinner{display:inline-block;width:14px;height:14px;border:2px solid var(--fg-dim);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;color:var(--fg-dim);padding:32px 16px}