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.checkmark{background-color:var(--gpt-input-bg);border-color:var(--gpt-input-border)}.history-item-checkbox-container:hover .checkmark{background-color:#ddd}.history-item-checkbox-container .history-item-checkbox:checked~.checkmark{background-color:var(--accent-color);border-color:var(--accent-color)}.history-item-checkbox-container .checkmark:after{content:"";position:absolute;display:none;left:6px;top:2px;width:5px;height:10px;border:solid white;border-width:0 3px 3px 0;transform:rotate(45deg)}.history-item-checkbox-container .history-item-checkbox:checked~.checkmark:after{display:block}#multi-select-actions{display:flex;gap:10px;padding:0}#multi-select-actions button{flex-grow:1;padding:10px;border-radius:8px;border:none;font-weight:500;cursor:pointer}#multi-select-actions .btn-secondary{background-color:#f0f0f0;color:var(--text-color)}#multi-select-actions .btn-danger{background-color:#f44336;color:#fff}.history-actions{display:none;margin-left:10px;flex-shrink:0;gap:5px;position:relative;z-index:3}.action-menu-btn{background:none;border:none;color:var(--icon-color);cursor:pointer;padding:5px;border-radius:50%;width:28px;height:28px;display:flex;align-items:center;justify-content:center;position:relative;z-index:4}.action-menu-btn:hover{background-color:#e0e0e0}.context-menu{position:absolute;right:10px;top:35px;background:#fff;border:1px solid var(--border-color);border-radius:8px;padding:8px 0;box-shadow:0 4px 8px #0000001a;z-index:10;display:none;min-width:160px}.context-menu button{display:flex;align-items:center;gap:12px;width:100%;background:none;border:none;color:var(--text-color);padding:10px 16px;text-align:left;cursor:pointer;border-radius:0;font-size:14px}.context-menu button:hover{background-color:var(--hover-bg)}.context-menu button svg{fill:var(--icon-color);width:18px;height:18px}.context-menu button[data-action=share] svg{fill:#4285f4}.context-menu button[data-action=delete],.context-menu button[data-action=delete] svg{color:#f44336;fill:#f44336;transition:all .2s ease-in-out}.context-menu button[data-action=delete]:hover{background-color:#fbebee;color:#d32f2f}.context-menu button[data-action=delete]:hover svg{fill:#d32f2f}.context-menu button:active{background-color:var(--hover-bg)}.chat-content-wrapper{position:relative;flex-grow:1;display:flex;flex-direction:column;overflow:hidden;min-height:0}.loader-bar{position:absolute;top:0;left:0;width:100%;height:3px;background-color:var(--border-color);overflow:hidden;z-index:9;display:none}.loader-bar.loading{display:block}.loader-bar:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background-color:var(--accent-color);animation:indeterminate-progress 1.5s infinite ease-in-out}html[data-theme=dark] .loader-bar{background-color:var(--border-color)}html[data-theme=dark] 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span{font-size:15px}.panel-nav-item:hover{background-color:#e9e9e9}.panel-nav-item.active{background-color:var(--hover-bg);color:var(--accent-color)}.panel-nav-item.active svg{stroke:var(--accent-color)}.settings-nav{width:200px;flex-shrink:0;padding:16px 8px;border-right:1px solid var(--border-color);background-color:#f8f9fa;overflow-y:auto;max-height:100%;-ms-overflow-style:none;scrollbar-width:none}.settings-nav::-webkit-scrollbar{width:0;height:0}.settings-nav-item{display:flex;align-items:center;padding:10px 16px;border-radius:8px;margin-bottom:4px;cursor:pointer;text-decoration:none;color:var(--secondary-text-color);transition:background-color .2s,color .2s;font-weight:500}.settings-nav-item svg{width:20px;height:20px;margin-right:16px;stroke:var(--icon-color);transition:stroke .2s}.settings-nav-item span{font-size:15px}.settings-nav-item:hover{background-color:#e9e9e9}.settings-nav-item.active{background-color:var(--hover-bg);color:var(--accent-color)}.settings-nav-item.active svg{stroke:var(--accent-color)}#settings-modal-overlay:not(.visible) .settings-nav-item.active{background-color:transparent;color:var(--secondary-text-color)}#settings-modal-overlay:not(.visible) .settings-nav-item.active svg{stroke:var(--icon-color)}.update-badge{display:none;background-color:var(--error-color);color:#fff;font-size:10px;font-weight:700;padding:2px 5px;border-radius:10px;margin-left:auto;min-width:16px;text-align:center}.settings-content{flex-grow:1;overflow-y:auto;padding:24px}.settings-content.no-scroll{overflow-y:hidden}.settings-page{display:none;max-width:720px;width:100%;margin:0 auto}.settings-page.active{display:block}.settings-page .form-group button{padding:12px;border-radius:8px;font-size:15px;font-weight:500;cursor:pointer;transition:background-color .2s}.settings-page h4{font-size:14px;font-weight:500;color:var(--secondary-text-color);margin:0 0 16px;padding-bottom:0;border-bottom:none;text-transform:uppercase;letter-spacing:.5px}.settings-page-grid{display:grid;grid-template-columns:1fr 1.6fr;column-gap:16px;row-gap:4px;align-items:flex-start;padding:10px 18px;border-bottom:1px solid var(--border-color);width:100%}.settings-page .settings-page-grid:last-of-type{border-bottom:none}.settings-description h3{margin:0 0 8px;font-size:16px;font-weight:600;color:var(--text-color);display:flex;align-items:center;gap:8px}.settings-description p{margin:0;font-size:14px;color:var(--secondary-text-color);line-height:1.4}.subscription-promo-link-row{display:flex;align-items:center;gap:8px}.subscription-promo-note{margin-top:10px;font-size:13px;color:var(--secondary-text-color);line-height:1.5}.subscription-pricing-link{margin-top:10px;font-size:14px;color:var(--secondary-text-color)}.subscription-pricing-link a{color:var(--accent-color);font-weight:600;text-decoration:none}.subscription-pricing-link a:hover{text-decoration:underline}.subscription-promo-link{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;font-size:18px;font-weight:700;border-radius:999px;border:1px solid rgba(22,120,247,.35);background:#1678f71f;text-decoration:none;color:#1678f7;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.subscription-promo-link-icon{width:18px;height:18px;fill:currentColor}.subscription-promo-link:hover{transform:translate(2px);background:#1678f72e;box-shadow:0 6px 14px #1678f740;text-decoration:none}.subscription-promo-link:focus-visible{outline:2px solid var(--primary-color);outline-offset:2px}@media (max-width: 640px){.subscription-promo-link{width:40px;height:40px;font-size:20px}.subscription-promo-link-icon{width:20px;height:20px}}.settings-form-area .form-group input{margin-bottom:6px}.settings-form-area .form-group input:last-child{margin-bottom:0}.settings-form-area button{margin-top:4px}.settings-toggle{position:relative;display:inline-flex;align-items:center;cursor:pointer;-webkit-user-select:none;user-select:none;width:52px;height:28px;margin-top:4px}.settings-toggle input{opacity:0;width:0;height:0;position:absolute}.settings-toggle-slider{position:relative;display:inline-block;width:100%;height:100%;background-color:var(--border-color);border-radius:999px;transition:background-color .2s ease;box-shadow:inset 0 0 0 1px #0000000d}.settings-toggle-slider:after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background-color:#fff;box-shadow:0 1px 3px #0f172a33;transition:transform .2s ease,background-color .2s ease}.settings-toggle input:checked+.settings-toggle-slider{background-color:#1d4ed8d9;box-shadow:inset 0 0 0 1px #2563eb80}.settings-toggle input:checked+.settings-toggle-slider:after{transform:translate(24px);background-color:#fff}.settings-toggle input:focus-visible+.settings-toggle-slider{outline:2px solid rgba(59,130,246,.5);outline-offset:2px}html[data-theme=dark] .settings-toggle-slider{background-color:#94a3b840;box-shadow:inset 0 0 0 1px #94a3b833}html[data-theme=dark] .settings-toggle-slider:after{background-color:#f8fafc;box-shadow:0 2px 6px #0f172a73}html[data-theme=dark] .settings-toggle input:checked+.settings-toggle-slider{background-color:#2563ebcc;box-shadow:inset 0 0 0 1px #3b82f68c}.settings-form-area .form-group .usage-info{margin-top:6px;color:var(--secondary-text-color);line-height:1.5}.settings-page .btn-primary:active,.settings-page .btn-secondary:active{transform:scale(.98);transition:transform .1s ease}.settings-page .form-group:first-child h4{margin-top:0}.panel-nav-toggle{display:none;background:none;border:none;color:var(--icon-color);cursor:pointer;padding:8px;margin-right:16px;border-radius:50%}#settings-nav-toggle-btn:hover,#subscription-nav-toggle-btn:hover,.panel-nav-toggle:hover{background-color:var(--hover-bg)}.settings-nav-header{display:none;justify-content:space-between;align-items:center;padding:10px 16px;margin-bottom:10px;border-bottom:1px solid var(--border-color)}.panel-nav-back{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--border-color);background:#fff;color:var(--icon-color);cursor:pointer}.panel-nav-back svg{fill:currentColor}.panel-nav-back:hover{background-color:var(--hover-bg)}html[data-theme=dark] .panel-nav-back{background:var(--chat-bg);border-color:var(--border-color);color:var(--icon-color)}.settings-nav-header h3{margin:0;font-size:18px;font-weight:500}.settings-content .settings-section{background-color:transparent;border:none;padding:0;margin:0}.settings-content .settings-section>h4:first-child{margin-top:0}.settings-content .settings-section .btn-primary,.settings-content .settings-section .btn-secondary{margin-top:16px}.settings-content .form-group input[type=password],.settings-content .form-group input[type=text]{background-color:#fff;padding:14px;font-size:15px;border:1px solid #dfe1e5;transition:all .2s ease-in-out}.settings-form{width:100%}.settings-form .form-group{margin-bottom:16px}.settings-form button[type=submit]{width:100%;margin-top:8px}.settings-content .form-group input[type=password]:focus,.settings-content .form-group input[type=text]:focus{border-color:var(--accent-color);box-shadow:0 0 0 3px #1a73e826}.settings-content .btn-primary,.settings-content .btn-secondary{width:100%;padding:14px;font-size:15px;font-weight:600;border-radius:8px;border:none;cursor:pointer;transition:all .2s ease-in-out}.settings-content .btn-primary:hover:not(:disabled){box-shadow:0 2px 8px #00000026;transform:translateY(-1px)}.settings-content .btn-secondary:hover:not(:disabled){background-color:#e8eaed}.custom-select{width:100%;padding:12px 40px 12px 14px;border:1.5px solid var(--border-color);border-radius:8px;font-size:14px;font-weight:500;background:var(--card-bg);color:var(--text-color);appearance:none;-webkit-appearance:none;-moz-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%231a73e8'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;background-size:20px;cursor:pointer;transition:border-color .2s ease;position:relative;z-index:3000}.custom-select:hover{border-color:var(--accent-color)}.custom-select:focus{outline:none;border-color:var(--accent-color)}html[data-theme=dark] .custom-select{background:var(--card-bg);color:var(--text-color);border-color:#ffffff26;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%231a73e8'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;background-size:20px}html[data-theme=dark] .custom-select:hover{border-color:var(--accent-color)}html[data-theme=dark] .custom-select:focus{border-color:var(--accent-color)}.custom-select::-ms-expand{display:none}.custom-select::-webkit-scrollbar{display:none}.custom-select option,html[data-theme=dark] .custom-select option{background:var(--card-bg);color:var(--text-color)}.custom-dropdown{position:relative;width:100%;z-index:1000}.dropdown-trigger{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;background:var(--card-bg);border:1.5px solid var(--border-color);border-radius:8px;cursor:pointer;transition:all .2s ease;min-height:44px;box-sizing:border-box}.dropdown-trigger:hover{border-color:var(--accent-color)}.dropdown-trigger.active{border-color:var(--accent-color);box-shadow:0 0 0 2px #1a73e81a}.dropdown-text{flex:1;color:var(--text-color);font-size:14px;font-weight:500;text-align:left}.dropdown-arrow{width:20px;height:20px;color:var(--accent-color);transition:transform .2s ease;flex-shrink:0}.dropdown-trigger.active .dropdown-arrow{transform:rotate(180deg)}.dropdown-menu{position:absolute;top:100%;left:0;right:0;background:#fff;border:1.5px solid var(--border-color);border-top:none;border-radius:0 0 8px 8px;box-shadow:0 4px 12px #0000001a;max-height:200px;overflow-y:auto;z-index:1000;display:none}.dropdown-menu.show{display:block}.dropdown-item{padding:12px 14px;color:var(--text-color);cursor:pointer;transition:background-color .2s ease;font-size:14px;font-weight:500;border-bottom:1px solid var(--border-color)}.dropdown-item:last-child{border-bottom:none}.dropdown-item:hover{background:var(--hover-bg)}.dropdown-item.active{background:var(--accent-color);color:#fff}.dropdown-item.active:hover{background:var(--accent-color)}html[data-theme=dark] .dropdown-trigger{background:var(--card-bg);border-color:#ffffff26}html[data-theme=dark] .dropdown-trigger:hover{border-color:var(--accent-color)}html[data-theme=dark] .dropdown-menu{background:#1e1e1e;border-color:#ffffff26;box-shadow:0 4px 12px #0000004d}html[data-theme=dark] .dropdown-item{color:var(--text-color);border-bottom-color:#ffffff1a}html[data-theme=dark] .dropdown-item:hover{background:var(--hover-bg)}html[data-theme=dark] .dropdown-item.active{background:var(--accent-color);color:#fff}#profile-settings-page.settings-page.active{display:flex;flex-direction:column;justify-content:flex-start;align-items:center;overflow-y:auto}#profile-settings-page>.form-group{width:100%;max-width:420px;text-align:center}.profile-edit-layout{display:flex;flex-direction:column;align-items:center;gap:16px;margin-bottom:16px;background-color:#f8f9fa;border:1px solid #eef0f2;border-radius:12px;padding:32px 24px;margin-top:0;width:100%;max-width:420px}.profile-edit-layout .form-group{width:100%;max-width:320px;margin-bottom:0}.profile-edit-layout input{text-align:center}.profile-edit-layout #edit-username{background:transparent;border:none;border-bottom:2px solid #ddd;border-radius:0;font-size:18px;font-weight:500;padding:8px 0;transition:all .2s ease-in-out}.profile-edit-layout #edit-username:focus{border-bottom-color:var(--accent-color);box-shadow:none}.avatar-upload-container{display:flex;flex-direction:column;align-items:center;gap:8px;flex-shrink:0}.avatar-preview-wrapper{position:relative;width:96px;height:96px;border-radius:50%;cursor:pointer;overflow:hidden;box-shadow:0 4px 12px #0000001a;border:2px solid #fff}.avatar-preview-wrapper.early-bird{border:2px solid transparent;overflow:visible;z-index:0}.avatar-preview-wrapper.early-bird:before{content:"";position:absolute;inset:-4px;border-radius:50%;background:linear-gradient(135deg,#f4b400,#6dd3ce,#1a73e8);z-index:-1}.avatar-preview-wrapper.early-bird:after{content:"";position:absolute;left:50%;bottom:-10px;width:22px;height:22px;transform:translate(-50%);background:#fff;border-radius:50%;box-shadow:0 0 0 1.5px #f4b400;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M21 6c-4.6 1-7.7 4-9.7 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#1a73e84d;transform:translateY(-2px)}.email-display{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--secondary-text-color);font-size:14px;padding:8px 0}#display-email:disabled{background-color:#f5f5f5;color:#888;cursor:not-allowed}.account-actions-group{margin-top:16px}#profile-settings-page #logout-btn{background:transparent;color:var(--secondary-text-color);font-size:16px;padding:14px;max-width:260px;font-weight:500}#profile-settings-page #logout-btn:hover{background-color:#fbebee;color:#d32f2f}.guest-profile-card{background-color:#f8f9fa;border:1px solid #eef0f2;border-radius:12px;padding:32px 24px;display:flex;flex-direction:column;align-items:center;text-align:center}.guest-avatar{width:80px;height:80px;border-radius:50%;background-color:#1a73e8;color:#fff;display:flex;align-items:center;justify-content:center;font-size:40px;font-weight:700;margin-bottom:16px;box-shadow:0 4px 12px #0000001a}.guest-info h3{margin:0 0 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label{display:block;font-weight:500;color:var(--secondary-text-color);font-size:14px;margin-bottom:8px;padding-left:4px}.custom-prompt-box input{margin-bottom:0}.input-wrapper.received-share-content{animation:share-received-glow 1.5s ease-out}@keyframes share-received-glow{0%{box-shadow:0 0 #1a73e800}50%{box-shadow:0 0 0 4px #1a73e84d}to{box-shadow:0 0 #1a73e800}}@keyframes pulse-animation{0%{transform:scale(1);opacity:.7}to{transform:scale(1.8);opacity:0}}#quote-preview-container{margin-bottom:8px;display:none}.quote-preview-box{background-color:var(--input-bg);border:1px solid var(--border-color);border-radius:12px;padding:8px 32px 8px 12px;font-size:14px;color:var(--secondary-text-color);position:relative;display:flex;align-items:center;animation:fadeIn .2s 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.btn-update{background:transparent;color:#e8eaed;border-color:#ffffff40}html[data-theme=dark] .inline-edit-actions .btn-cancel:hover,html[data-theme=dark] .inline-edit-actions .btn-update:hover{background:#ffffff1f}@keyframes fadeIn{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}button:focus,.settings-item:focus,.history-item:focus{outline:none}button,.settings-item,.history-item{-webkit-tap-highlight-color:transparent}@media (hover: none) and (pointer: coarse){.no-focus *:focus{outline:none!important;box-shadow:none!important}}.source-choice-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#0009;display:flex;align-items:flex-end;justify-content:center;z-index:10000;opacity:0;transition:opacity .3s ease}.source-choice-overlay.visible{opacity:1}.source-choice-sheet{background-color:var(--chat-bg);width:100%;max-width:500px;border-radius:16px 16px 0 0;padding:16px;padding-bottom:calc(16px + var(--safe-area-inset-bottom));transform:translateY(100%);transition:transform .3s ease}.source-choice-overlay.visible .source-choice-sheet{transform:translateY(0)}.source-choice-sheet button{display:block;width:100%;padding:16px;font-size:18px;border:none;background-color:transparent;color:var(--accent-color);border-bottom:1px solid var(--border-color);cursor:pointer}.source-choice-sheet button:last-child{border-bottom:none;margin-top:8px;color:#f44336;border-radius:8px;background-color:var(--hover-bg)}.floating-label-group{position:relative;margin-bottom:24px}.floating-label-group .api-key-input{width:100%;padding:14px;font-size:15px;border:1px solid var(--border-color);border-radius:8px;background-color:var(--gpt-input-bg);color:var(--text-color);transition:border-color .2s ease}.floating-label-group label{position:absolute;top:14px;left:14px;font-size:15px;color:var(--secondary-text-color);pointer-events:none;transition:all .2s ease-in-out;background-color:var(--gpt-input-bg);padding:0 4px}.floating-label-group .api-key-input:focus+label,.floating-label-group .api-key-input:not(:placeholder-shown)+label{top:-8px;left:10px;font-size:12px;color:var(--accent-color)}.floating-label-group .api-key-input:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 1px var(--accent-color)}.floating-label-group .api-key-input.error{border-color:#f44336;box-shadow:0 0 0 1px #f44336}.floating-label-group .api-key-input.error:focus{border-color:#f44336;box-shadow:0 0 0 1px #f44336}#security-confirm-code,#security-mfa-code,#current-password,#new-password-setting,#confirm-new-password-setting{width:100%;max-width:480px;padding:12px 14px;font-size:15px;border:1px solid var(--border-color);border-radius:8px;background-color:var(--gpt-input-bg);color:var(--text-color);box-sizing:border-box}#security-confirm-code:focus,#security-mfa-code:focus,#current-password:focus,#new-password-setting:focus,#confirm-new-password-setting:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 1px var(--accent-color)}.api-mode-selector{display:flex;border:1px solid var(--border-color);border-radius:8px;overflow:hidden;margin:20px 0}.api-mode-selector input[type=radio]{display:none}.api-mode-selector .mode-label{flex:1;text-align:center;padding:10px 12px;cursor:pointer;font-size:14px;font-weight:500;color:var(--secondary-text-color);background-color:var(--gpt-input-bg);transition:background-color .2s,color .2s;-webkit-user-select:none;user-select:none}.api-mode-selector .mode-label:first-of-type{border-right:1px solid var(--border-color)}.api-mode-selector input[type=radio]:checked+.mode-label{background-color:var(--accent-color);color:#fff;box-shadow:inset 0 1px 3px #0000001a}html[data-theme=dark] .api-mode-selector{border-color:var(--gpt-input-border)}html[data-theme=dark] .api-mode-selector .mode-label:first-of-type{border-right-color:var(--gpt-input-border)}html[data-theme=dark] .api-mode-selector input[type=radio]:checked+.mode-label{background-color:var(--accent-color);color:#fff}html.native-safe-area-applied #image-viewer-modal .modal-header,html.native-safe-area-applied .image-viewer-modal .modal-header,html.native-safe-area-applied #file-viewer .modal-header{padding-top:16px}html.native-safe-area-applied #file-viewer .modal-footer,html.native-safe-area-applied .image-viewer-modal .modal-footer{padding-bottom:16px}#api-settings-page .settings-form-area form,#security-settings-page .settings-form{display:flex;flex-direction:column;gap:4px}#api-settings-page .settings-form-area .form-group,#security-settings-page .settings-form 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