.layout{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden}.layout-body{display:flex;flex:1;min-height:0}.layout-main{flex:1;display:flex;flex-direction:column;min-width:0;overflow:hidden}.sidebar-overlay{display:none}@media(max-width:768px){.sidebar-overlay{display:block;position:fixed;inset:0;background:#00000080;z-index:140;animation:fadeIn var(--transition-fast) ease}}.sidebar-toggle{position:fixed;top:calc(var(--header-height) + var(--space-md));left:var(--space-md);z-index:200;display:none;align-items:center;justify-content:center;width:36px;height:36px;background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text-secondary);transition:all var(--transition-fast)}.sidebar-toggle:hover{background:var(--color-bg-hover);color:var(--color-text-primary)}.sidebar{display:flex;flex-direction:column;width:var(--sidebar-width);height:100%;background:var(--color-bg-sidebar);border-right:1px solid var(--color-border);overflow:hidden;flex-shrink:0;transition:transform var(--transition-base)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-lg) var(--space-lg);border-bottom:1px solid var(--color-border);flex-shrink:0}.sidebar-title{font-size:var(--font-size-sm);font-weight:600;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em}.new-chat-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-sm);color:var(--color-text-secondary);transition:all var(--transition-fast)}.new-chat-btn:hover{background:var(--color-bg-hover);color:var(--color-accent)}.sidebar-chats{flex:1;overflow-y:auto;padding:var(--space-sm)}.sidebar-empty{padding:var(--space-xl) var(--space-lg);text-align:center;color:var(--color-text-muted);font-size:var(--font-size-sm)}.sidebar-chat-item{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-md);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);color:var(--color-text-secondary);position:relative}.sidebar-chat-item:hover{background:var(--color-bg-hover);color:var(--color-text-primary)}.sidebar-chat-item--active{background:#2563eb14;color:var(--color-text-primary)}.sidebar-chat-item--active .chat-icon{color:var(--color-accent)}.chat-icon{flex-shrink:0;opacity:.5}.chat-item-title{flex:1;font-size:var(--font-size-sm);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-delete-btn{display:flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:var(--radius-sm);color:var(--color-text-muted);opacity:0;transition:all var(--transition-fast);flex-shrink:0}.sidebar-chat-item:hover .chat-delete-btn{opacity:1}.chat-delete-btn:hover{background:#dc26261a;color:var(--color-danger)}.sidebar-footer{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);border-top:1px solid var(--color-border);flex-shrink:0}.sidebar-user{display:flex;align-items:center;gap:var(--space-md);min-width:0;flex:1}.sidebar-avatar{width:32px;height:32px;border-radius:var(--radius-full);flex-shrink:0;object-fit:cover}.sidebar-avatar--placeholder{display:flex;align-items:center;justify-content:center;background:var(--color-accent);color:#fff;font-size:var(--font-size-sm);font-weight:600}.sidebar-user-info{display:flex;flex-direction:column;min-width:0}.sidebar-user-name{font-size:var(--font-size-sm);font-weight:500;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-email{font-size:var(--font-size-xs);color:var(--color-text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.logout-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-sm);color:var(--color-text-muted);transition:all var(--transition-fast);flex-shrink:0}.logout-btn:hover{background:#dc262614;color:var(--color-danger)}.sidebar-footer-actions{display:flex;align-items:center;gap:var(--space-xs)}.theme-toggle-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;color:var(--color-text-secondary);border-radius:var(--radius-md);transition:all var(--transition-fast)}.theme-toggle-btn:hover{color:var(--color-text-primary);background:var(--color-bg-hover)}@media(max-width:768px){.sidebar-toggle{display:flex}.sidebar{position:fixed;top:0;left:0;bottom:0;z-index:150;transform:translate(-100%);box-shadow:var(--shadow-lg)}.sidebar--open{transform:translate(0)}}.top-disclaimer{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);background:var(--color-bg-disclaimer);border-bottom:1px solid var(--color-border-disclaimer);color:var(--color-text-disclaimer);font-size:var(--font-size-xs);font-weight:500;height:var(--header-height);flex-shrink:0;z-index:100}.disclaimer-detail-btn{background:none;border:none;color:var(--color-accent);font-size:var(--font-size-xs);font-weight:600;cursor:pointer;padding:0;text-decoration:underline;text-underline-offset:2px;transition:opacity var(--transition-fast)}.disclaimer-detail-btn:hover{opacity:.8}.disclaimer-icon{flex-shrink:0;opacity:.8}.truncation-modal-overlay{position:fixed;inset:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--space-lg);animation:fadeIn .2s ease}.truncation-modal{background:var(--color-bg-primary);border-radius:var(--radius-xl);max-width:520px;width:100%;max-height:85vh;overflow-y:auto;position:relative;box-shadow:0 20px 60px #0000004d;animation:slideUp .3s ease}.truncation-modal-close{position:absolute;top:var(--space-md);right:var(--space-md);width:32px;height:32px;border-radius:var(--radius-full);background:var(--color-bg-tertiary);border:1px solid var(--color-border);color:var(--color-text-secondary);font-size:14px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.truncation-modal-close:hover{background:var(--color-bg-secondary);color:var(--color-text-primary)}.truncation-modal-header{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-xl) var(--space-xl) var(--space-md)}.truncation-modal-icon{font-size:1.75rem}.truncation-modal-header h2{font-size:1.25rem;font-weight:700;color:var(--color-text-primary);margin:0}.truncation-modal-body{padding:0 var(--space-xl) var(--space-xl);font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:1.7}.truncation-modal-body>p{margin-bottom:var(--space-lg)}.truncation-info-card{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-lg);margin-bottom:var(--space-md)}.truncation-info-card h3{font-size:var(--font-size-base);font-weight:600;color:var(--color-text-primary);margin:0 0 var(--space-sm)}.truncation-info-card p{margin:0 0 var(--space-sm)}.truncation-info-card ul{margin:0;padding-left:1.25em}.truncation-info-card li{margin-bottom:var(--space-xs)}.truncation-info-card--highlight{background:linear-gradient(135deg,#6366f114,#a78bfa14);border-color:#6366f140}.model-links{list-style:none;padding-left:0}.model-links li{margin-bottom:var(--space-sm)}.model-links a{display:inline-flex;align-items:center;gap:var(--space-xs);color:var(--color-accent);text-decoration:none;font-weight:500;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);background:#6366f114;transition:all var(--transition-fast)}.model-links a:hover{background:#6366f126;text-decoration:underline}.truncation-info-thanks{text-align:center;font-weight:500;color:var(--color-text-primary);margin-top:var(--space-lg)!important;margin-bottom:0!important}:root{--color-bg-primary: #ffffff;--color-bg-secondary: #f8f9fa;--color-bg-tertiary: #f0f2f5;--color-bg-sidebar: #f8f9fa;--color-bg-input: #f0f2f5;--color-bg-message-user: #2563eb;--color-bg-message-ai: #f0f2f5;--color-bg-hover: rgba(0, 0, 0, .04);--color-bg-modal-overlay: rgba(0, 0, 0, .4);--color-bg-disclaimer: rgba(245, 158, 11, .06);--color-text-primary: #1a1a1a;--color-text-secondary: #6b7280;--color-text-muted: #9ca3af;--color-text-disclaimer: #b45309;--color-text-inverse: #ffffff;--color-border: #e5e7eb;--color-border-focus: #2563eb;--color-border-disclaimer: rgba(245, 158, 11, .25);--color-accent: #2563eb;--color-accent-hover: #1d4ed8;--color-accent-glow: rgba(37, 99, 235, .15);--color-danger: #dc2626;--color-success: #16a34a;--color-warning: #d97706;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-size-xs: .75rem;--font-size-sm: .8125rem;--font-size-base: .9375rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.5rem;--font-size-2xl: 2rem;--space-xs: .25rem;--space-sm: .5rem;--space-md: .75rem;--space-lg: 1rem;--space-xl: 1.5rem;--space-2xl: 2rem;--space-3xl: 3rem;--sidebar-width: 280px;--header-height: 40px;--input-area-height: auto;--max-message-width: 720px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 20px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .1);--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease}[data-theme=dark]{--color-bg-primary: #0f172a;--color-bg-secondary: #1e293b;--color-bg-tertiary: #334155;--color-bg-sidebar: #0f172a;--color-bg-input: #1e293b;--color-bg-message-user: #3b82f6;--color-bg-message-ai: #1e293b;--color-bg-hover: rgba(255, 255, 255, .05);--color-bg-modal-overlay: rgba(0, 0, 0, .7);--color-bg-disclaimer: rgba(245, 158, 11, .1);--color-text-primary: #f1f5f9;--color-text-secondary: #94a3b8;--color-text-muted: #64748b;--color-text-disclaimer: #fbbf24;--color-border: #334155;--color-border-focus: #60a5fa;--color-accent: #3b82f6;--color-accent-hover: #2563eb;--color-accent-glow: rgba(59, 130, 246, .25);--color-danger: #ef4444;--color-success: #22c55e;--color-warning: #f59e0b}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text-primary);background:var(--color-bg-primary);line-height:1.6;min-height:100vh;min-height:100dvh;overflow-x:hidden}a{color:var(--color-accent);text-decoration:none}a:hover{color:var(--color-accent-hover)}button{font-family:var(--font-family);cursor:pointer;border:none;background:none;color:inherit;font-size:inherit}input,textarea{font-family:var(--font-family);color:var(--color-text-primary);background:transparent;border:none;outline:none}img{max-width:100%;display:block}ul,ol{list-style:none}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#0000001f;border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#0003}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.animate-slide-up{animation:slideUp var(--transition-base) ease forwards}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.loading-spinner{width:24px;height:24px;border:2px solid var(--color-border);border-top-color:var(--color-accent);border-radius:50%;animation:spin .6s linear infinite}.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh;height:100dvh;background:var(--color-bg-primary)}