*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f1117;--surface: #1a1d27;--border: #2a2d3e;--accent: #e07b39;--user-bg: #e07b39;--user-text: #fff;--assistant-bg: #1e2130;--assistant-text: #d4d8f0;--muted: #6b7280;--input-bg: #1e2130;--radius: 12px;font-family:system-ui,-apple-system,sans-serif}body{background:var(--bg);color:var(--assistant-text);height:100dvh;overflow:hidden}.app{display:flex;flex-direction:column;height:100dvh;max-width:800px;margin:0 auto}.header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0}.header-title{display:flex;align-items:center;gap:10px}.header-icon{font-size:1.4rem}h1{font-size:1.1rem;font-weight:600;color:#fff}.header-meta{display:flex;align-items:center;gap:12px}.session-label{font-size:.75rem;color:var(--muted);font-family:monospace}.new-session-btn{font-size:.78rem;padding:5px 12px;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--muted);cursor:pointer;transition:color .15s,border-color .15s}.new-session-btn:hover{color:#fff;border-color:#fff}.messages{flex:1;overflow-y:auto;padding:24px 20px;display:flex;flex-direction:column;gap:16px}.empty-state{margin:auto;text-align:center;color:var(--muted);line-height:1.7}.example-hint{font-size:.88rem;margin-top:8px}.example-hint em{color:var(--accent);font-style:normal}.message-row{display:flex}.user-row{justify-content:flex-end}.assistant-row{justify-content:flex-start}.bubble{max-width:72%;padding:12px 16px;border-radius:var(--radius);line-height:1.6;font-size:.93rem}.user-bubble{background:var(--user-bg);color:var(--user-text);border-bottom-right-radius:3px}.assistant-bubble{background:var(--assistant-bg);color:var(--assistant-text);border:1px solid var(--border);border-bottom-left-radius:3px}.bubble-text{white-space:pre-wrap;word-break:break-word}.sources{margin-top:10px;font-size:.78rem;color:var(--muted)}.sources summary{cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--accent);font-size:.78rem}.sources ul{margin-top:6px;padding-left:16px;display:flex;flex-direction:column;gap:2px}.sources li{font-family:monospace;word-break:break-all}.typing-indicator{display:flex;gap:5px;padding:14px 18px;background:var(--assistant-bg);border:1px solid var(--border);border-radius:var(--radius);border-bottom-left-radius:3px;align-items:center}.typing-indicator span{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:bounce 1.2s infinite ease-in-out}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:translateY(0);opacity:.4}40%{transform:translateY(-6px);opacity:1}}.input-bar{display:flex;gap:10px;padding:16px 20px;border-top:1px solid var(--border);background:var(--surface);flex-shrink:0}.input-field{flex:1;padding:10px 14px;border-radius:8px;border:1px solid var(--border);background:var(--input-bg);color:#fff;font-size:.93rem;outline:none;transition:border-color .15s}.input-field:focus{border-color:var(--accent)}.input-field::placeholder{color:var(--muted)}.input-field:disabled{opacity:.5}.send-btn{padding:10px 20px;border-radius:8px;border:none;background:var(--accent);color:#fff;font-size:.93rem;font-weight:600;cursor:pointer;transition:opacity .15s;flex-shrink:0}.send-btn:hover:not(:disabled){opacity:.85}.send-btn:disabled{opacity:.4;cursor:not-allowed}