*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary:#0d0d0d;--bg-secondary:#171717;--bg-tertiary:#212121;--bg-card:#171717;--bg-card-hover:#1f1f1f;--bg-input:#212121;--text-primary:#fff;--text-secondary:#a1a1a1;--text-tertiary:#6b6b6b;--border-primary:#2a2a2a;--border-secondary:#3a3a3a;--accent:#10b981;--accent-hover:#059669;--user-bubble:#2a2a2a;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px}[data-theme="light"]{--bg-primary:#fff;--bg-secondary:#f5f5f5;--bg-tertiary:#e5e5e5;--bg-card:#f5f5f5;--bg-card-hover:#ebebeb;--bg-input:#f5f5f5;--text-primary:#0d0d0d;--text-secondary:#525252;--text-tertiary:#a1a1a1;--border-primary:#e5e5e5;--border-secondary:#d4d4d4;--user-bubble:#e5e5e5}[data-theme="light"] .send-btn.active{background:#0d0d0d;color:white}[data-theme="light"] .send-btn.active:hover{background:#2a2a2a}body{font-family:'Inter',-apple-system,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.5;overflow:hidden;height:100vh}.app{display:flex;height:100vh}.sidebar{width:260px;background:var(--bg-primary);display:flex;flex-direction:column;transition:margin-left .3s ease}[data-theme="dark"] .sidebar{background:#18181b}[data-theme="light"] .sidebar{background:hsl(0,0%,98%)}.sidebar.collapsed{margin-left:-260px}.sidebar-header{height:56px;padding:0 16px;display:flex;align-items:center;justify-content:space-between}.sidebar-logo{font-size:18px;font-weight:700}.sidebar-btn{width:32px;height:32px;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all .15s}.sidebar-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.sidebar-btn svg{width:20px;height:20px}.sidebar-promo{padding:0 16px 16px}.sidebar-promo-text{font-size:13px;color:var(--text-tertiary);margin-bottom:12px;line-height:1.4}.pro-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:6px 16px;background:#16bc87;border:none;border-radius:6px;color:white;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s;text-decoration:none}.pro-btn:hover{background:#13a677}.pro-btn svg{width:16px;height:16px}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border-primary);position:relative;margin-top:auto}.user-badge{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-sm);cursor:pointer;transition:background .15s;background:var(--bg-tertiary)}.user-badge:hover{background:var(--bg-card-hover)}[data-theme="dark"] .user-badge{background:#000cc}[data-theme="dark"] .user-badge:hover{background:#000ee}[data-theme="dark"] .user-badge.open{background:#27272a}[data-theme="light"] .user-badge{background:#fff}[data-theme="light"] .user-badge:hover{background:#fafafa}[data-theme="light"] .user-badge.open{background:#f5f5f5}.user-avatar{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,#f97316 0,#ec4899 50%,#8b5cf6 100%)}.user-name{font-size:14px;font-weight:500;flex:1}[data-theme="dark"] .user-name{color:#fafafa}.user-badge .user-arrow{width:16px;height:16px;color:var(--text-tertiary);transition:transform .2s}[data-theme="dark"] .user-badge .user-arrow{color:#fafafa}.user-badge.open .user-arrow{transform:rotate(180deg)}.user-menu{position:absolute;bottom:100%;left:16px;right:16px;background:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius-sm);margin-bottom:8px;overflow:hidden;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .15s}[data-theme="dark"] .user-menu{background:#27272a}.user-menu.show{opacity:1;visibility:visible;transform:translateY(0)}.user-menu-item{display:block;width:100%;padding:14px 16px;font-size:15px;color:var(--text-primary);background:none;border:none;text-align:left;cursor:pointer;transition:background .15s;border-bottom:1px solid var(--border-primary)}.user-menu-item:last-child{border-bottom:none}.user-menu-item:hover{background:var(--bg-tertiary)}[data-theme="dark"] .user-menu-item:hover{background:#3f3f46}.sidebar-link{display:block;padding:8px;font-size:13px;color:var(--text-tertiary);text-decoration:none;text-align:center;margin-top:8px}.sidebar-link:hover{color:var(--text-secondary)}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative;overflow-y:scroll;overflow-x:hidden}.chat-main::-webkit-scrollbar{width:8px}.chat-main::-webkit-scrollbar-track{background:transparent}.chat-main::-webkit-scrollbar-thumb{background:var(--border-secondary);border-radius:4px}[data-theme="dark"] .chat-main::-webkit-scrollbar-thumb{background:#3f3f46}.chat-header{height:56px;min-height:56px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 16px;position:sticky;top:0;background:var(--bg-primary);z-index:10}.header-btn{width:40px;height:40px;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all .15s}.header-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.header-btn svg{width:20px;height:20px}.header-pro{display:flex;align-items:center;gap:8px;padding:5px 12px;background:#16bc87;border:none;border-radius:6px;color:white;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s;text-decoration:none}.header-pro:hover{background:#13a677}.header-pro svg{width:16px;height:16px}.subscribe-popup{display:none;position:fixed;top:70px;left:50%;transform:translateX(-50%);align-items:center;gap:10px;padding:12px 18px;background:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:24px;font-size:13px;box-shadow:0 4px 20px rgba(0,0,0,0.15);z-index:50;animation:popupSlide .3s ease}.subscribe-popup.show{display:flex}.subscribe-popup svg{flex-shrink:0;width:18px;height:18px}[data-theme="dark"] .subscribe-popup svg path{stroke:#0d0d0d}@keyframes popupSlide{from{opacity:0;transform:translateX(-50%) translateY(-10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}.modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:100;align-items:center;justify-content:center}.modal-overlay.show{display:flex}.modal{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:24px;max-width:420px;width:90%;animation:modalSlide .2s ease}@keyframes modalSlide{from{opacity:0;transform:scale(0.95)}to{opacity:1;transform:scale(1)}}.modal-title{font-size:18px;font-weight:600;margin-bottom:8px}.modal-text{font-size:14px;color:var(--text-secondary);margin-bottom:20px}.modal-buttons{display:flex;gap:12px;justify-content:flex-end}.modal-btn{padding:10px 20px;border-radius:6px;font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;transition:all .15s;text-decoration:none}.modal-btn-secondary{background:transparent;border:1px solid var(--border-primary);color:var(--text-primary)}.modal-btn-secondary:hover{background:var(--bg-tertiary)}.modal-btn-primary{background:#0d0d0d;border:none;color:white}.modal-btn-primary:hover{background:#262626}[data-theme="light"] .modal-btn-primary{background:#0d0d0d;color:white}.messages-container{flex:1;display:flex;flex-direction:column}.welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding:24px;padding-bottom:16px;width:100%}.welcome-text{flex:1;display:flex;flex-direction:column;justify-content:center;width:100%;max-width:800px}.welcome-title{font-size:32px;font-weight:700;margin-bottom:4px}.welcome-sub{font-size:20px;color:var(--text-secondary);margin-bottom:0}.suggestions{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;width:100%;max-width:800px}.suggestion{padding:16px 20px;background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--radius-md);cursor:pointer;transition:all .15s;text-align:left}.suggestion:hover{background:var(--bg-card-hover);border-color:var(--border-secondary)}.suggestion-title{font-size:15px;font-weight:600;margin-bottom:4px}.suggestion-text{font-size:14px;color:var(--text-secondary)}.messages-list{padding:24px;display:flex;flex-direction:column;gap:24px;max-width:800px;margin:0 auto;width:100%;overflow-x:hidden}.message{display:flex;gap:16px}.message.user{justify-content:flex-end}.msg-avatar{width:32px;height:32px;border-radius:50%;background:#0d0d0d;border:1px solid var(--border-primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}.msg-avatar svg{width:16px;height:16px;color:white}[data-theme="light"] .msg-avatar{background:white}[data-theme="light"] .msg-avatar svg{color:#0d0d0d}.message.user .msg-avatar{display:none}.msg-content{flex:1;min-width:0;max-width:100%}.message.user .msg-content{flex:none;max-width:70%}.msg-bubble{font-size:15px;line-height:1.6;overflow-x:hidden}.message.user 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.15s}.model-sel:hover{background:var(--bg-tertiary);color:var(--text-primary)}[data-theme="light"] .model-sel{color:var(--text-primary)}.model-sel svg{width:14px;height:14px}.dropdown{position:relative}.dropdown-menu{position:absolute;bottom:100%;left:0;background:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:8px;box-shadow:0 4px 20px rgba(0,0,0,0.5);width:max-content;min-width:260px;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .15s;z-index:100;margin-bottom:8px;overflow:hidden;padding:3px 0}.dropdown-menu.show{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-divider{height:1px;background:var(--border-primary);margin:6px 0}.dropdown-item{display:flex;align-items:flex-start;gap:9px;padding:9px 12px;cursor:pointer;transition:all .15s;border-radius:6px;margin:2px 6px}.dropdown-item:hover{background:var(--bg-tertiary)}.dropdown-item.disabled{cursor:default}.dropdown-item.disabled:hover{background:var(--bg-tertiary)}.dropdown-item-icon{width:18px;height:18px;flex-shrink:0;margin-top:1px}.dropdown-item-content{flex:1;min-width:0}.dropdown-item-header{display:flex;align-items:center;gap:8px;margin-bottom:2px;white-space:nowrap}.dropdown-item-name{font-size:13px;font-weight:600;color:var(--text-primary);white-space:nowrap}.dropdown-item-badge{padding:2px 6px;background:#3b82f6;color:white;font-size:9px;font-weight:500;border-radius:4px;white-space:nowrap;flex-shrink:0}.dropdown-item-desc{font-size:11px;color:var(--text-tertiary);white-space:nowrap}.dropdown-item-check{width:18px;height:18px;flex-shrink:0;opacity:0;align-self:center}.dropdown-item.active .dropdown-item-check{opacity:1}.typing{display:none;gap:16px;max-width:800px;margin:0 auto;padding:0 24px 24px;width:100%}.typing.visible{display:flex}.typing-dots{display:flex;gap:4px;padding:12px 0}.typing-dot{width:8px;height:8px;background:var(--text-tertiary);border-radius:50%;animation:bounce 1.4s ease-in-out infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-6px)}}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;visibility:hidden;transition:all .2s}.modal-overlay.show{opacity:1;visibility:visible}.modal{background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px solid var(--border-primary);width:100%;max-width:400px;transform:scale(0.95);transition:transform .2s}.modal-overlay.show .modal{transform:scale(1)}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-primary)}.modal-title{font-size:16px;font-weight:600}.modal-close{width:32px;height:32px;border:none;background:transparent;color:var(--text-tertiary);cursor:pointer;border-radius:6px;display:flex;align-items:center;justify-content:center}.modal-close:hover{background:var(--bg-tertiary);color:var(--text-primary)}.modal-close svg{width:18px;height:18px}.modal-body{padding:20px}.settings-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--border-primary)}.settings-row:last-child{border-bottom:none}.settings-label{font-size:14px}.toggle{width:44px;height:24px;background:var(--bg-tertiary);border:none;border-radius:12px;cursor:pointer;position:relative;transition:background .2s}.toggle.active{background:var(--accent)}.toggle::after{content:'';position:absolute;width:20px;height:20px;background:white;border-radius:50%;top:2px;left:2px;transition:transform .2s}.toggle.active::after{transform:translateX(20px)}.attached-files{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 8px}.attached-file{display:flex;align-items:center;gap:8px;padding:6px 10px;background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--radius-sm);font-size:12px;color:var(--text-secondary)}.attached-file svg{width:14px;height:14px}.file-remove{width:18px;height:18px;border:none;background:transparent;color:var(--text-tertiary);cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center}.file-remove:hover{color:#ef4444}#fileInput{display:none}.msg-bubble p{margin:0 0 12px 0}.msg-bubble p:last-child{margin-bottom:0}.msg-bubble ul,.msg-bubble ol{margin:12px 0;padding-left:24px}.msg-bubble li{margin:4px 0}.msg-bubble a{color:var(--accent);text-decoration:none}.msg-bubble a:hover{text-decoration:underline}.msg-bubble strong{font-weight:600}.msg-bubble code:not(pre code){background:var(--bg-tertiary);padding:2px 6px;border-radius:4px;font-family:'JetBrains Mono',monospace;font-size:.9em}@media(max-width:768px){.sidebar{position:fixed;left:0;top:0;bottom:0;z-index:100;width:280px;transition:margin-left .3s ease}.sidebar.collapsed{margin-left:-280px}.sidebar-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:99;opacity:0;visibility:hidden;transition:all .3s}.sidebar-overlay.show{opacity:1;visibility:visible}.suggestions{grid-template-columns:1fr;gap:8px}.suggestion:nth-child(3),.suggestion:nth-child(4){display:none}.suggestion{padding:14px 16px}.suggestion-title{display:inline;margin-bottom:0}.suggestion-title::after{content:' '}.suggestion-text{display:inline}.welcome{padding:16px;padding-bottom:12px}.welcome-title{font-size:24px}.welcome-sub{font-size:16px}.input-area{padding:12px 16px 16px}.messages-list{padding:16px}.message.user .msg-content{max-width:85%}}