*{box-sizing:border-box;margin:0;padding:0}body{background:#f3f4f6;margin:0;font-family:Arial,Helvetica,sans-serif}#root{width:100%;min-height:100vh}*{box-sizing:border-box;margin:0;padding:0;font-family:Arial,Helvetica,sans-serif}html,body,#root{height:100%}body{color:#1f2937;background:#f3f4f6}.app{flex-direction:column;height:100vh;display:flex}.header{background:#fff;border-bottom:1px solid #e5e7eb;flex-shrink:0;justify-content:space-between;align-items:center;height:72px;padding:0 30px;display:flex}.logo h1{margin-bottom:4px;font-size:28px}.logo p{color:#6b7280;font-size:14px}.settings-btn{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:50%;justify-content:center;align-items:center;width:46px;height:46px;font-size:22px;transition:all .25s;display:flex}.settings-btn:hover{background:#1d4ed8;transform:rotate(25deg)}.settings-btn svg{transition:transform .3s}.settings-btn:hover svg{transform:rotate(90deg)}.thinking-btn{cursor:pointer;color:#555;background:#f0f0f0;border:1px solid #ddd;border-radius:4px;margin-bottom:8px;padding:6px 12px;font-size:13px;transition:all .2s}.thinking-btn:hover{background:#e0e0e0}.thinking-box{color:#888;background:#f9f9f9;border-left:3px solid #ccc;margin-bottom:12px;padding:12px;font-size:14px;line-height:1.5}.messages{scroll-behavior:smooth;flex-direction:column;flex:1;gap:18px;padding:30px;display:flex;overflow-y:auto}.messages::-webkit-scrollbar{width:8px}.messages::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:20px}.messages::-webkit-scrollbar-thumb:hover{background:#94a3b8}.empty-state{text-align:center;margin:auto}.empty-state h2{margin-bottom:12px;font-size:36px}.empty-state p{color:#6b7280;font-size:18px}.message-row{width:100%;display:flex}.user-row{justify-content:flex-end}.ai-row{justify-content:flex-start}.message{word-break:break-word;border-radius:18px;max-width:75%;padding:14px 18px;font-size:16px;line-height:1.6;animation:.25s fadeIn}.user{color:#fff;white-space:pre-wrap;background:#2563eb;border-bottom-right-radius:6px}.ai{color:#111827;background:#fff;border:1px solid #e5e7eb;border-bottom-left-radius:6px}.input-container{background:#fff;border-top:1px solid #e5e7eb;flex-shrink:0;padding:18px 24px}.input-area{align-items:flex-end;gap:14px;max-width:1000px;margin:auto;display:flex}.textarea-wrapper{flex:1;position:relative}.input-area textarea{resize:none;border:1px solid #d1d5db;border-radius:14px;outline:none;width:100%;min-height:56px;max-height:180px;padding:16px 54px 16px 16px;font-size:16px;transition:all .25s;overflow-y:auto}.stop-btn{color:#fff;cursor:pointer;background:#ef4444;border:none;border-radius:8px;justify-content:center;align-items:center;width:34px;height:34px;transition:background .2s;display:flex;position:absolute;bottom:10px;right:10px}.stop-btn:hover{background:#dc2626}.input-area textarea:focus{border-color:#2563eb;box-shadow:0 0 0 3px #2563eb26}.send-btn{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:10px;height:56px;padding:0 28px;font-size:16px;font-weight:700;transition:all .25s}.send-btn:hover{background:#1d4ed8}.settings-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:999;background:#0f172a61;animation:.25s settingsOverlayIn;position:fixed;inset:0}.settings-drawer{background:#fff;flex-direction:column;width:460px;max-width:92vw;height:100vh;animation:.3s settingsDrawerIn;display:flex;position:absolute;top:0;left:0;box-shadow:10px 0 40px #0000002e}.settings-header{border-bottom:1px solid #e5e7eb;justify-content:space-between;align-items:center;min-height:88px;padding:24px 24px 20px;display:flex}.settings-header h2{color:#111827;margin:0 0 5px;font-size:26px}.settings-header p{color:#6b7280;margin:0;font-size:14px}.settings-close-btn{color:#4b5563;cursor:pointer;background:#f3f4f6;border:none;border-radius:10px;justify-content:center;align-items:center;width:40px;height:40px;transition:all .2s;display:flex}.settings-close-btn:hover{color:#111827;background:#e5e7eb}.settings-content{flex:1;padding:22px;overflow-y:auto}.settings-content::-webkit-scrollbar{width:7px}.settings-content::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:20px}.settings-content::-webkit-scrollbar-thumb:hover{background:#94a3b8}.setting-section{margin-bottom:14px}.setting-title{color:#111827;cursor:pointer;text-align:left;background:#fff;border:1px solid #e5e7eb;border-radius:14px;justify-content:space-between;align-items:center;width:100%;padding:17px 18px;transition:all .2s;display:flex}.setting-title:hover{background:#f8fafc;border-color:#cbd5e1}.setting-title.active{background:#f8fbff;border-color:#2563eb;border-bottom-right-radius:8px;border-bottom-left-radius:8px}.setting-title-left{align-items:center;gap:14px;display:flex}.setting-icon{background:#eff6ff;border-radius:10px;justify-content:center;align-items:center;width:38px;height:38px;font-size:18px;display:flex}.setting-title strong{margin-bottom:3px;font-size:15px;display:block}.setting-title small{color:#6b7280;font-size:12px;font-weight:400;display:block}.setting-arrow{color:#6b7280;font-size:11px;transition:transform .2s}.setting-panel{background:#f8fafc;border:1px solid #e5e7eb;border-top:none;border-bottom-right-radius:14px;border-bottom-left-radius:14px;padding:20px;animation:.2s settingPanelIn}.temperature-header{color:#374151;justify-content:space-between;align-items:center;margin-bottom:18px;font-size:14px;display:flex}.temperature-header strong{color:#2563eb;font-size:22px}.temperature-slider{accent-color:#2563eb;cursor:pointer;width:100%;height:6px}.temperature-range{color:#9ca3af;justify-content:space-between;margin-top:9px;font-size:11px;display:flex}.temperature-info{color:#6b7280;margin:18px 0 0;font-size:13px;line-height:1.6}.system-prompt-input{resize:vertical;background:#fff;border:1px solid #d1d5db;border-radius:10px;outline:none;width:100%;min-height:150px;max-height:300px;padding:14px;font-family:inherit;font-size:14px;line-height:1.6;transition:all .2s}.system-prompt-input:focus{border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1f}.setting-description{color:#6b7280;margin:12px 0 0;font-size:12px;line-height:1.5}.settings-footer{background:#fff;border-top:1px solid #e5e7eb;justify-content:flex-end;gap:10px;padding:18px 22px;display:flex}.settings-footer button{cursor:pointer;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:600;transition:all .2s}.settings-cancel{color:#374151;background:#fff;border:1px solid #d1d5db}.settings-cancel:hover{background:#f3f4f6}.settings-save{color:#fff;background:#2563eb;border:none}.settings-save:hover{background:#1d4ed8}.loading{align-items:center;gap:7px;display:flex}.loading span{background:#6b7280;border-radius:50%;width:9px;height:9px;animation:1.2s ease-in-out infinite typing}.loading span:nth-child(2){animation-delay:.2s}.loading span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,80%,to{opacity:.4;transform:scale(.7)}40%{opacity:1;transform:scale(1.25)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes settingsOverlayIn{0%{opacity:0}to{opacity:1}}@keyframes settingsDrawerIn{0%{transform:translate(-100%)}to{transform:translate(0)}}@keyframes settingPanelIn{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.thinking-toggle{color:#6b7280;cursor:pointer;white-space:nowrap;background:0 0;border:2px solid #d1d5db;border-radius:10px;align-items:center;gap:6px;height:56px;padding:0 20px;font-size:15px;font-weight:600;transition:all .3s;display:flex}.thinking-toggle:hover{background:#f3f4f6;border-color:#9ca3af}.thinking-toggle.active{color:#2563eb;background:0 0;border-color:#2563eb}.thinking-toggle.active:hover{background:#eff6ff}.media-menu-wrapper{position:relative}.media-plus-btn{color:#6b7280;cursor:pointer;background:0 0;border:2px solid #d1d5db;border-radius:10px;justify-content:center;align-items:center;width:56px;height:56px;transition:all .3s;display:flex}.media-plus-btn:hover{background:#f3f4f6;border-color:#9ca3af}.media-menu{z-index:20;background:#fff;border:1px solid #e0e0e0;border-radius:10px;min-width:180px;padding:10px 14px;position:absolute;bottom:64px;left:0;box-shadow:0 4px 12px #0000001f}.media-menu-title{color:#888;margin:0 0 6px;font-size:12px;font-weight:600}.media-menu ul{flex-direction:column;gap:4px;margin:0;padding:0;font-size:14px;list-style:none;display:flex}.media-menu ul li{cursor:pointer;border-radius:6px;align-items:center;gap:8px;padding:6px;display:flex}.media-menu ul li:hover{background:#f3f4f6}.attachment-preview-row{flex-wrap:wrap;gap:8px;margin-bottom:8px;display:flex}.attachment-preview-row.pending{max-width:1000px;margin:0 auto 10px}.attachment-chip{color:#1d4ed8;background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;align-items:center;gap:6px;padding:5px 10px;font-size:13px;display:flex}.attachment-chip.sent{color:inherit;background:#ffffff26;border-color:#ffffff4d}.attachment-chip button{cursor:pointer;color:inherit;background:0 0;border:none;align-items:center;padding:0;display:flex}@media (width<=900px){.header{padding:0 18px}.logo h1{font-size:22px}.logo p{font-size:13px}.messages{padding:18px}.message{max-width:90%}.input-container{padding:16px}.settings-drawer{width:440px;max-width:94vw}}@media (width<=600px){.header{height:64px}.logo h1{font-size:20px}.logo p{display:none}.settings-btn{width:42px;height:42px}.messages{gap:14px;padding:14px}.message{max-width:100%;padding:12px 15px;font-size:15px}.input-area{gap:10px}.input-area textarea{min-height:52px;padding:14px 48px 14px 14px;font-size:15px}.stop-btn{width:30px;height:30px;bottom:8px;right:8px}.send-btn,.thinking-toggle,.media-plus-btn{height:52px}.send-btn{padding:0 18px;font-size:15px}.settings-drawer{width:100%;max-width:100%}.settings-header{padding:20px}.settings-header h2{font-size:23px}.settings-content{padding:16px}.setting-title{padding:15px}.setting-panel,.settings-footer{padding:16px}}