*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .3s,color .3s}body[data-theme=dark]{--bg-primary: #0d0d0d;--bg-secondary: #1a1a1a;--bg-tertiary: #1e1e1e;--bg-quaternary: #2a2a2a;--border-color: #333;--border-light: #444;--text-primary: #e0e0e0;--text-secondary: #bbb;--text-tertiary: #888;--text-quaternary: #666;--accent: #6366f1;--accent-hover: #5558e3;--error-bg: #3f1a1a;--error-text: #f87171;--user-msg-bg: #6366f1;--user-msg-text: #fff;--assistant-msg-bg: #1e1e1e;--assistant-msg-text: #e0e0e0;--input-bg: #1a1a1a;--input-border: #333;--input-focus-border: #555;--button-hover: #2a2a2a;--avatar-bg: #333;--badge-bg: #222;--login-bg-start: #1a1a2e;--login-bg-end: #16213e;--login-card: #1e1e1e;--attachment-bg: rgba(255, 255, 255, .05);--shadow: rgba(0, 0, 0, .5);--drawer-overlay: rgba(0, 0, 0, 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.2s;margin-top:8px}.login-button:hover{background:var(--accent-hover)}.login-button:disabled{opacity:.6;cursor:not-allowed}.error-message{padding:12px;border-radius:8px;background:var(--error-bg);color:var(--error-text);font-size:14px;text-align:center}.chat-page{display:flex;width:100%;height:100vh;overflow:hidden}.sidebar{width:300px;min-width:300px;flex-shrink:0;background:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.sidebar-title{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:16px}.model-select{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border-light);background:var(--bg-quaternary);color:var(--text-primary);font-size:13px;cursor:pointer}.new-chat-button{width:100%;padding:10px 16px;border-radius:8px;border:1px dashed 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var(--border-color)}.input-wrapper{display:flex;gap:12px;max-width:800px;margin:0 auto}.message-input{flex:1;padding:12px 16px;border-radius:12px;border:1px solid var(--input-border);background:var(--input-bg);color:var(--text-primary);font-size:15px;resize:none;max-height:150px}.message-input:focus{outline:none;border-color:var(--input-focus-border)}.attach-button{padding:12px;border-radius:12px;border:1px solid var(--input-border);background:var(--input-bg);color:var(--text-tertiary);cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center;font-size:20px}.attach-button:hover{background:var(--bg-quaternary);color:var(--text-primary)}.send-button{padding:12px 20px;border-radius:12px;border:none;background:var(--accent);color:#fff;font-size:20px;font-weight:600;cursor:pointer;transition:all 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dots{0%,20%{content:"."}40%{content:".."}60%,to{content:"..."}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-light)}.drawer-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:var(--drawer-overlay);z-index:99;opacity:0;pointer-events:none;transition:opacity .3s}.drawer-overlay.open{opacity:1;pointer-events:auto}.drawer{position:fixed;top:0;left:0;bottom:0;width:280px;background:var(--bg-secondary);z-index:100;transform:translate(-100%);transition:transform .3s ease;display:flex;flex-direction:column;overflow:hidden}.drawer.open{transform:translate(0)}.drawer-header{padding:16px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;flex-shrink:0;background:var(--bg-secondary)}.drawer-content{flex:1;overflow:hidden;display:flex;flex-direction:column}.drawer-content .sidebar-header{display:none}.drawer-content .sidebar{width:100%;height:100%;border:none}.drawer-content .threads-list{overflow-y:auto}.drawer-content .sidebar-footer{border-top:1px solid var(--border-color)}.drawer-header{padding:16px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.drawer-close{padding:8px;border-radius:8px;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:24px}.drawer-close:hover{background:var(--bg-quaternary)}@media(max-width:768px){.sidebar{display:none}.drawer-overlay{display:block}.mobile-menu-button{display:flex}.chat-header{padding:12px 16px}.messages-container{padding:16px}.message-content{max-width:100%;padding:10px 14px;font-size:14px}.message-image{max-width:100%}.message-input-area{padding:12px 16px}.input-wrapper{gap:8px}.attach-button,.send-button{padding:10px;font-size:18px}.login-card{width:90%;padding:32px 24px}.chat-model-badge{display:none}}