:root{--color-primary: #F33D53;--color-primary-dark: #D42E43;--color-primary-light: #FF5A6E;--color-background: #000000;--color-surface: #1C1C1E;--color-surface-elevated: #2C2C2E;--color-header: #1C1C1E;--color-text-primary: #FFFFFF;--color-text-secondary: #8E8E93;--color-text-tertiary: #636366;--color-success: #34C759;--color-warning: #FF9500;--color-error: #FF3B30;--color-info: #007AFF;--color-unread: #F33D53;--color-separator: rgba(84, 84, 88, .65);--color-separator-opaque: #38383A;--safe-area-top: env(safe-area-inset-top, 0px);--safe-area-bottom: env(safe-area-inset-bottom, 0px);--safe-area-left: env(safe-area-inset-left, 0px);--safe-area-right: env(safe-area-inset-right, 0px);--header-height: 44px;--tab-bar-height: 49px;--search-bar-height: 36px;--font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, sans-serif;--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 15px;--font-size-md: 17px;--font-size-lg: 20px;--font-size-xl: 24px;--font-size-2xl: 28px;--font-size-3xl: 34px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s 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svg{width:80px;height:80px}.loading-spinner{width:32px;height:32px;border:3px solid var(--color-separator);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}.loading-content p{font-size:var(--font-size-md);color:var(--color-text-secondary)}.header{position:fixed;top:0;left:0;right:0;z-index:100;background:var(--color-surface);padding-top:var(--safe-area-top);border-bottom:.5px solid var(--color-separator)}.header-content{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 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svg{width:22px;height:22px}.header-button-label{font-size:var(--font-size-md);font-weight:500}.header-button.primary{background:var(--color-primary);color:#fff;border-radius:20px;padding:0 16px;min-width:auto}.header-button.primary:active{background:var(--color-primary-dark)}.mail-page,.settings-page,.compose-page,.account-settings-page,.add-account-page,.login-page{display:flex;flex-direction:column;height:100%;min-height:100%;background:var(--color-background)}.last-refresh{padding:8px 16px;margin-top:calc(var(--header-height) + var(--safe-area-top));font-size:var(--font-size-xs);color:var(--color-text-tertiary);text-align:center;background:var(--color-surface);border-bottom:.5px solid var(--color-separator)}.last-refresh+.main-content{margin-top:0}.main-content{flex:1;margin-top:calc(var(--header-height) + var(--safe-area-top));margin-bottom:calc(var(--tab-bar-height) + var(--safe-area-bottom));overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain;background:var(--color-background)}.main-content.no-tab-bar{margin-bottom:0;padding-bottom:calc(60px + var(--safe-area-bottom))}.tab-bar{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:space-around;align-items:flex-start;height:calc(var(--tab-bar-height) + var(--safe-area-bottom));padding-top:6px;padding-bottom:var(--safe-area-bottom);background:var(--color-surface);border-top:.5px solid var(--color-separator);z-index:100}.tab-item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 20px;color:var(--color-text-secondary);background:none;border:none;cursor:pointer;transition:color var(--transition-fast)}.tab-item.active{color:var(--color-primary)}.tab-item svg{width:24px;height:24px}.tab-item span{font-size:var(--font-size-xs)}.last-refresh{position:sticky;top:0;z-index:10;padding:6px 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var(--transition-fast);will-change:transform;-webkit-user-select:none;user-select:none}.email-item.swiping{transition:none}.email-item:active:not(.swiping){background:var(--color-surface-elevated)}.email-avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600;color:#fff;flex-shrink:0}.email-content{flex:1;min-width:0;overflow:hidden}.email-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2px}.email-sender{font-size:var(--font-size-base);font-weight:400;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.email-sender.unread{font-weight:600}.email-time{display:flex;align-items:center;gap:4px;font-size:var(--font-size-sm);color:var(--color-text-secondary);flex-shrink:0;margin-left:8px}.attachment-icon{width:14px;height:14px}.email-subject{font-size:var(--font-size-sm);color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:2px}.email-subject.unread{font-weight:500}.email-preview{font-size:var(--font-size-sm);color:var(--color-text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.email-indicators{display:flex;flex-direction:column;align-items:center;gap:4px;padding-top:2px}.unread-dot{width:10px;height:10px;border-radius:50%;background:var(--color-primary)}.star-icon{width:16px;height:16px;color:var(--color-text-tertiary)}.star-icon.active{color:var(--color-warning)}.skeleton-item{display:flex;gap:12px;padding:12px 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var(--transition-fast)}.btn-load-more:active{background:var(--color-primary);color:#fff}.email-detail-page{display:flex;flex-direction:column;height:100%;background:var(--color-background)}.email-detail-header{padding:16px;background:var(--color-surface);border-bottom:.5px solid 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var(--transition-fast)}.folder-drawer{position:fixed;top:0;left:0;bottom:0;width:300px;max-width:85vw;background:var(--color-surface);z-index:201;display:flex;flex-direction:column;animation:slideInLeft var(--transition-normal);padding-top:var(--safe-area-top);padding-bottom:var(--safe-area-bottom)}@keyframes slideInLeft{0%{transform:translate(-100%);opacity:0}to{transform:translate(0);opacity:1}}.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:.5px solid var(--color-separator)}.drawer-title{font-size:var(--font-size-xl);font-weight:700}.drawer-close{width:32px;height:32px;border-radius:50%;background:var(--color-surface-elevated);border:none;display:flex;align-items:center;justify-content:center;cursor:pointer}.drawer-close svg{width:18px;height:18px;color:var(--color-text-primary)}.drawer-content{flex:1;overflow-y:auto;padding:8px 0}.drawer-footer{padding:16px;border-top:.5px solid var(--color-separator)}.folder-section{margin-bottom:8px}.folder-section-title{padding:12px 16px 8px;font-size:var(--font-size-xs);font-weight:600;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.5px}.folder-item{display:flex;align-items:center;padding:12px 16px;cursor:pointer;transition:background var(--transition-fast)}.folder-item.selected .folder-icon,.folder-item.selected .folder-name{color:var(--color-primary)}.folder-item-content{display:flex;align-items:center;flex:1;min-width:0}.folder-icon{width:24px;height:24px;margin-right:12px;color:var(--color-text-secondary);flex-shrink:0}.folder-name{flex:1;font-size:var(--font-size-base);color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.folder-badge{padding:2px 8px;border-radius:10px;background:var(--color-primary);color:#fff;font-size:var(--font-size-xs);font-weight:600;margin-left:8px}.folder-check{width:20px;height:20px;color:var(--color-primary);margin-left:8px}.folder-actions{display:flex;gap:4px;margin-left:8px}.folder-action-btn{width:32px;height:32px;border-radius:8px;background:var(--color-surface-elevated);border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--color-text-secondary);transition:all var(--transition-fast)}.folder-action-btn:active{transform:scale(.95)}.folder-action-btn svg{width:16px;height:16px}.folder-action-btn.delete{color:var(--color-error)}.btn-add-folder{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:12px;background:var(--color-primary);color:#fff;border:none;border-radius:10px;font-size:var(--font-size-base);font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.btn-add-folder:active{transform:scale(.98);background:var(--color-primary-dark)}.btn-add-folder svg{width:20px;height:20px}.modal-alert{max-height:auto;border-radius:14px;inset:50% 16px auto;transform:translateY(-50%);animation:fadeIn var(--transition-normal)}.modal-alert-title{font-size:var(--font-size-lg);font-weight:600;text-align:center;margin-bottom:8px}.modal-alert-text{font-size:var(--font-size-md);color:var(--color-text-secondary);text-align:center;margin-bottom:20px}.modal-alert-actions{display:flex;gap:12px}.modal-alert-actions .btn{flex:1}.folder-list{padding:0}.folder-item{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:.5px solid var(--color-separator);cursor:pointer;transition:background var(--transition-fast)}.folder-item:active{background:var(--color-surface-elevated)}.folder-item.selected{background:#f33d531a}.folder-icon{width:24px;height:24px;color:var(--color-text-secondary)}.folder-icon svg{width:100%;height:100%}.folder-name{flex:1;font-size:var(--font-size-md)}.folder-check{width:20px;height:20px;color:var(--color-primary)}.toast{position:fixed;bottom:calc(var(--tab-bar-height) + var(--safe-area-bottom) + 16px);left:16px;right:16px;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--color-surface-elevated);border-radius:12px;box-shadow:0 4px 20px #0000004d;z-index:300;animation:slideUp var(--transition-normal)}.toast-content{display:flex;align-items:center;gap:12px;flex:1}.toast-icon{width:20px;height:20px;flex-shrink:0}.toast-icon svg{width:100%;height:100%}.toast-success .toast-icon{color:var(--color-success)}.toast-error .toast-icon{color:var(--color-error)}.toast-info .toast-icon{color:var(--color-info)}.toast-message{font-size:var(--font-size-md);color:var(--color-text-primary)}.toast-close{width:24px;height:24px;background:none;border:none;color:var(--color-text-tertiary);cursor:pointer;flex-shrink:0}.toast-close svg{width:16px;height:16px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center}.empty-state-icon{width:80px;height:80px;margin-bottom:16px;color:var(--color-text-tertiary)}.empty-state-icon svg{width:100%;height:100%}.empty-state-title{font-size:var(--font-size-lg);font-weight:600;margin-bottom:8px}.empty-state-text{font-size:var(--font-size-base);color:var(--color-text-secondary);max-width:280px}.loading-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;gap:16px}.loading-state p{color:var(--color-text-secondary)}.spinner{width:24px;height:24px;border:2px solid var(--color-separator);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}.spinner.small{width:16px;height:16px;border-width:2px}.spinner.large{width:40px;height:40px;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px;background:var(--color-background)}.login-container{width:100%;max-width:360px}.login-logo{display:flex;justify-content:center;margin-bottom:24px}.login-logo svg{width:80px;height:80px}.login-title{font-size:var(--font-size-2xl);font-weight:700;text-align:center;margin-bottom:8px}.login-subtitle{font-size:var(--font-size-md);color:var(--color-text-secondary);text-align:center;margin-bottom:32px}.login-form{margin-bottom:16px}.manual-toggle{display:block;width:100%;padding:12px;font-size:var(--font-size-sm);color:var(--color-text-secondary);text-align:center;background:none;border:none;cursor:pointer;margin-bottom:16px}.manual-toggle:hover{color:var(--color-primary)}.manual-config{margin-bottom:16px;padding:16px;background:var(--color-surface);border-radius:12px}.selectable{-webkit-user-select:text;user-select:text}.hidden{display:none!important}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}@supports (-webkit-touch-callout: none){input,textarea,select{font-size:16px!important}}@media (display-mode: standalone){:root{--safe-area-top: env(safe-area-inset-top, 47px);--safe-area-bottom: env(safe-area-inset-bottom, 34px)}}@media (orientation: landscape) and (max-height: 500px){.header-content{height:36px}.tab-bar{height:calc(40px + var(--safe-area-bottom))}}