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invert(1)}.bottom-model-selector-wrapper{position:relative}.bottom-model-btn{display:flex;align-items:center;gap:6px;padding:6px 10px;background:var(--bg-hover);border-radius:8px;cursor:pointer;font-size:13px;color:var(--text-secondary);transition:all .2s ease}.bottom-model-btn:hover{background:var(--border-primary);color:var(--text-primary)}.model-icon-small{width:16px;height:16px}.model-dropdown.bottom-up{top:auto;bottom:100%;left:0;margin-bottom:8px;margin-top:0;transform-origin:bottom left}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:env(safe-area-inset-top) 24px 0 24px;background:var(--bg-primary);height:calc(60px + env(safe-area-inset-top));flex-shrink:0;position:sticky;top:0;z-index:50;border-bottom:1px solid var(--border-primary)}.header-left{display:flex;align-items:center;gap:12px}.header-right,.model-menu-wrapper{position:relative}.header-model-trigger{display:flex;align-items:center;gap:12px;padding:8px 12px;border-radius:8px;cursor:pointer;transition:background .2s ease}.header-model-trigger:hover,.header-model-trigger.active{background:var(--bg-hover)}.app-title{font-size:18px;font-weight:600;color:var(--text-primary)}.current-model-name{font-size:18px;font-weight:500}.model-arrow{width:12px;height:12px;filter:var(--icon-filter);transition:transform .2s ease}.rotate-180{transform:rotate(180deg)}.text-gradient-red-purple{background:linear-gradient(90deg,#ef4444,#581c87,#ef4444);background-size:200% auto;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;color:#581c87;animation:gradient-move 4s linear infinite}@keyframes gradient-move{0%{background-position:0% 50%}to{background-position:200% 50%}}.font-light{font-weight:300!important}.model-dropdown{position:absolute;top:100%;left:0;margin-top:8px;background:var(--bg-tertiary);border:1px solid var(--border-primary);border-radius:12px;padding:6px;box-shadow:var(--shadow-menu);z-index:1000;min-width:240px;max-height:400px;overflow-y:auto;animation:slideUp .2s cubic-bezier(.16,1,.3,1)}.model-option{display:flex;align-items:center;gap:12px;padding:12px;border-radius:8px;cursor:pointer;transition:all .2s ease}.model-option:hover,.model-option.selected{background:var(--bg-hover)}.model-option.disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.model-option.disabled:hover{background:transparent}.coming-soon{color:var(--text-tertiary);font-style:italic}.model-option-auto{display:flex;align-items:center;justify-content:space-between;padding:12px;cursor:pointer;transition:background .2s ease;border-radius:8px}.model-option-auto:hover{background:var(--bg-hover)}.toggle-switch{width:36px;height:20px;background:var(--bg-input);border:1px solid var(--border-primary);border-radius:999px;position:relative;transition:all .2s ease;flex-shrink:0}.toggle-switch.active{background:var(--accent-primary);border-color:var(--accent-primary)}.toggle-knob{width:16px;height:16px;background:white;border-radius:50%;position:absolute;top:1px;left:1px;transition:all .2s ease;box-shadow:0 1px 2px #0003}.toggle-switch.active .toggle-knob{transform:translate(16px)}.model-option-more{display:flex;align-items:center;justify-content:center;gap:8px;padding:10px;color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all .2s ease;margin-top:4px;border-top:1px solid var(--border-primary)}.model-option-more:hover{color:var(--text-primary);background:var(--bg-hover);border-radius:8px}.more-arrow{width:10px;height:10px;filter:var(--icon-filter);transition:transform .2s ease}.model-option-icon{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--bg-input);border-radius:8px;border:1px solid var(--border-primary);flex-shrink:0}.model-option-icon img{width:20px;height:20px}.model-option-content{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.model-option-title{font-size:14px;font-weight:500;color:var(--text-primary)}.model-option-desc{font-size:12px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.model-option-check{margin-left:auto;display:flex;align-items:center;justify-content:center;width:16px;flex-shrink:0}.model-option-check img{width:14px;height:14px}.mobile-menu-btn{display:none;background:none;border:none;color:var(--text-primary);padding:4px;cursor:pointer}@media (max-width: 768px){.chat-header{padding:0 16px}.mobile-menu-btn{display:flex}.sidebar{position:fixed;left:0;top:0;bottom:0;box-shadow:var(--shadow-lg)}.sidebar.collapsed{transform:translate(-100%)}.messages-container{padding:20px 16px 200px}.chat-footer:not(.centered){padding:0 16px max(16px,env(safe-area-inset-bottom)) 16px}.user-menu-token-item{padding:12px 16px}.token-progress-container{margin-top:.5rem}.token-progress-bar{height:8px}.token-progress-text{font-size:.875rem}}.rotate-90{transform:rotate(90deg)}.menu-header-sub{display:flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;border-radius:6px;color:var(--text-primary);transition:background-color .2s ease}.menu-header-sub:hover{background:var(--bg-hover)}.menu-title-sub{font-size:14px;font-weight:500}.menu-icon-back{display:flex;align-items:center;justify-content:center;width:20px;height:20px;color:var(--text-secondary)}.menu-icon-back img{width:12px;height:12px;filter:var(--icon-filter)}.rotate-minus-90{transform:rotate(-90deg)}.icon-btn{background:transparent;border:none;padding:8px;cursor:pointer;color:var(--text-secondary);border-radius:8px;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.icon-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.menu-title,.menu-title-sub,.menu-subtitle{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.header-auth-btns{display:flex;gap:12px;align-items:center;margin-right:12px}.header-login-btn,.header-signup-btn{padding:6px 16px;border-radius:20px;font-size:14px;font-weight:500;cursor:pointer;text-decoration:none;transition:all .2s ease;display:inline-block}.header-login-btn{color:#000;background:#ffffff;border:1px solid #ffffff}.header-login-btn:hover{background:#e0e0e0}.header-signup-btn{position:relative;color:#fff;background:transparent;border:none;z-index:1}.header-signup-btn:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;border-radius:20px;padding:2px;background:linear-gradient(90deg,#ff0000,#800080,#ff0000);background-size:200% 100%;animation:gradient-move 3s linear infinite;-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;z-index:-1}.header-signup-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #9a00904d}@keyframes gradient-move{0%{background-position:0% 0}to{background-position:200% 0}}.header-auth-btns{display:flex;align-items:center;gap:1rem}.policy-menu-wrapper{position:relative;display:flex;align-items:center}.policy-menu-btn{background:transparent;border:none;color:#fff9;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s;width:36px;height:36px}.policy-menu-btn:hover{background:rgba(255,255,255,.1);color:#fff}.policy-dropdown-menu{position:absolute;top:100%;right:0;margin-top:.5rem;width:200px;background:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:12px;padding:.5rem;box-shadow:var(--shadow-menu);z-index:2000;overflow:hidden;color:var(--text-primary)}.header-menu-wrapper{position:relative;display:flex;align-items:center}.square-icon-btn{width:36px;height:36px;padding:8px;border-radius:8px;background:var(--bg-input);border:1px solid var(--border-primary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;color:var(--text-secondary)}.square-icon-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.square-icon-btn img{width:20px;height:20px;opacity:.8;filter:var(--icon-filter)}.header-dropdown-menu{position:absolute;top:100%;left:0;margin-top:8px;width:auto;min-width:160px;max-width:260px;background:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:12px;padding:8px;box-shadow:var(--shadow-menu);z-index:2000;overflow:hidden;color:var(--text-primary)}.header-dropdown-menu .menu-title{white-space:normal;word-break:break-word}.header-dropdown-menu .menu-item{padding:10px;justify-content:space-between}.check-icon{width:16px;height:16px}[data-theme=light] .header-login-btn{background:#000000;color:#fff;border:1px solid #000000}[data-theme=light] .header-login-btn:hover{background:#333333;border-color:#333}[data-theme=light] .header-signup-btn{color:#000}[data-theme=dark] .header-login-btn{background:#ffffff;color:#000}[data-theme=dark] .header-signup-btn{color:#fff}.header-dropdown-menu.right-aligned{left:auto;right:0}.menu-icon-small{width:16px;height:16px;opacity:.8}@media (max-width: 768px){.chat-header{padding:0 12px;gap:8px}.header-model-trigger{gap:6px;padding:6px 8px;min-width:0}.app-title{font-size:16px}.current-model-name{font-size:14px;max-width:120px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:inline-block;vertical-align:middle}.header-auth-btns{gap:8px;flex-shrink:0}.header-login-btn,.header-signup-btn{font-size:13px;padding:6px 12px}}@media (max-width: 380px){.current-model-name{max-width:80px}.app-title{display:none}}