/* Современный дизайн ToDo SaaS с поддержкой тем */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Светлая тема - новая цветовая палитра */
    --primary: #06b6d4;
    --primary-dark: #0891b2;
    --primary-light: #22d3ee;
    --secondary: #8b5cf6;
    --accent: #f59e0b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Нейтральные цвета - светлая тема */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    --border: #cbd5e1;
    --border-light: #e2e8f0;
    
    /* Градиент фона */
    --bg-gradient: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #ec4899 100%);
    
    /* Тени */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Радиусы */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Переходы */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Темная тема */
[data-theme="dark"] {
    --primary: #22d3ee;
    --primary-dark: #06b6d4;
    --primary-light: #67e8f9;
    --secondary: #a78bfa;
    --accent: #fbbf24;
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --info: #60a5fa;
    
    --bg-primary: #1e293b;
    --bg-secondary: #0f172a;
    --bg-tertiary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --border: #334155;
    --border-light: #1e293b;
    
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* Системная тема (автоматическое определение) */
@media (prefers-color-scheme: dark) {
    [data-theme="system"] {
        --primary: #22d3ee;
        --primary-dark: #06b6d4;
        --primary-light: #67e8f9;
        --secondary: #a78bfa;
        --accent: #fbbf24;
        --success: #34d399;
        --warning: #fbbf24;
        --danger: #f87171;
        --info: #60a5fa;
        
        --bg-primary: #1e293b;
        --bg-secondary: #0f172a;
        --bg-tertiary: #1e293b;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-tertiary: #94a3b8;
        --border: #334155;
        --border-light: #1e293b;
        
        --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
        
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    }
}

html {
    height: 100%;
    height: -webkit-fill-available;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    min-height: -webkit-fill-available;
    margin: 0;
    padding: 0;
    padding-bottom: env(safe-area-inset-bottom);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
    width: 100%;
}

/* Навигация */
.navbar {
    background: var(--bg-primary);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: 0.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
    transition: background 0.3s ease, border-color 0.3s ease;
    padding-top: max(0.5rem, env(safe-area-inset-top));
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 3rem;
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Выпадающее меню пользователя */
.user-menu {
    position: relative;
    display: flex;
    align-items: center;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
    min-width: 120px;
}

.user-menu-trigger:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
}

.user-menu-arrow {
    font-size: 0.7rem;
    transition: var(--transition);
    opacity: 0.7;
}

.user-menu-trigger.active .user-menu-arrow {
    transform: rotate(180deg);
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    min-width: 250px;
    max-width: 300px;
    z-index: 1000;
    display: none;
    overflow: hidden;
    animation: slideDown 0.2s ease;
}

.user-menu-dropdown.show {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-menu-header {
    padding: 1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.user-menu-header strong {
    color: var(--text-primary);
    font-size: 0.875rem;
}

/* Иконка статуса уведомлений */
.notification-icon {
    font-size: 1.25rem;
    cursor: pointer;
    margin-left: 0.5rem;
    transition: var(--transition);
    display: inline-block;
    vertical-align: middle;
    user-select: none;
    flex-shrink: 0;
}

.notification-icon.enabled {
    opacity: 1;
    filter: none;
}

.notification-icon.disabled {
    opacity: 0.5;
    filter: grayscale(100%);
    cursor: pointer;
}

.notification-icon.disabled:hover {
    opacity: 0.8;
    transform: scale(1.1);
}

.notification-icon:active {
    transform: scale(0.95);
}

.user-menu-divider {
    height: 1px;
    background: var(--border);
    margin: 0.5rem 0;
}

.user-menu-section {
    padding: 0.75rem 1rem;
}

.user-menu-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

/* Переключатель темы в виде toggle switch */
.theme-toggle-switch-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}

.theme-icon {
    font-size: 1.25rem;
    opacity: 0.6;
    transition: var(--transition);
}

.theme-toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.theme-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.theme-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border);
    transition: var(--transition);
    border-radius: var(--radius-full);
}

.theme-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    transition: var(--transition);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.theme-toggle-switch input:checked + .theme-slider {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-color: var(--primary);
}

.theme-toggle-switch input:checked + .theme-slider:before {
    transform: translateX(24px);
}

.theme-toggle-switch input:focus + .theme-slider {
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}

.theme-system-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: var(--transition);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.25rem;
}

.theme-system-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
    color: var(--text-primary);
}

.theme-system-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-color: var(--primary);
    color: white;
}

.user-menu-item {
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-menu-item:hover {
    background: var(--bg-secondary);
    color: var(--danger);
}

.logout-btn {
    color: var(--danger);
}

/* Переключатель темы */
.theme-toggle {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 0.2rem;
}

.theme-toggle-btn {
    background: transparent;
    border: none;
    padding: 0.4rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    font-size: 0.875rem;
}

.theme-toggle-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.theme-toggle-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

/* Кнопки */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

/* Экраны */
.screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 4rem);
    min-height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 4rem);
}

/* Экран авторизации */
.auth-container {
    max-width: 420px;
    margin: auto;
    padding: 2rem 1.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    transition: background 0.3s ease;
    width: 100%;
    max-width: 90%;
}

.auth-container h2 {
    margin-bottom: 1.5rem;
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.auth-switch {
    text-align: center;
    margin-top: 1rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
}

.auth-switch a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Вкладки */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    background: var(--bg-primary);
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: background 0.3s ease;
}

.tab {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition);
    border-radius: var(--radius);
    flex: 1;
    text-align: center;
}

.tab.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Заголовок секции */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Фильтры */
.filter-buttons {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.group-filter-select {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
}

.filter-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
    color: var(--text-primary);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

/* Карточки задач */
.tasks-list,
.groups-list {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    width: 100%;
    box-sizing: border-box;
}

.task-card,
.group-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.task-card:hover,
.group-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.task-card.shared-task {
    border-left: 4px solid var(--secondary);
    background: linear-gradient(to right, rgba(139, 92, 246, 0.1), var(--bg-primary));
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.task-title-section {
    flex: 1;
}

.task-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.task-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
    font-weight: 500;
}

.task-badges {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-end;
}

.task-type-badge,
.shared-badge,
.geo-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    display: inline-block;
}

.task-type-badge {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.badge-personal {
    background: rgba(6, 182, 212, 0.2);
    color: #0891b2;
    border: 1px solid rgba(6, 182, 212, 0.3);
    font-weight: 700;
}

.badge-family {
    background: rgba(16, 185, 129, 0.2);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.3);
    font-weight: 700;
}

.badge-group {
    background: rgba(139, 92, 246, 0.2);
    color: #7c3aed;
    border: 1px solid rgba(139, 92, 246, 0.3);
    font-weight: 700;
}

.shared-badge {
    background: rgba(139, 92, 246, 0.25);
    color: #7c3aed;
    border: 1px solid rgba(139, 92, 246, 0.4);
    font-weight: 700;
}

.geo-badge {
    background: transparent;
    font-size: 1rem;
    padding: 0;
}

.task-items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.task-item {
    padding: 0.75rem;
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid var(--border);
    background: var(--bg-primary);
}

.task-item:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.1);
}

.task-item.completed {
    opacity: 0.7;
}

.task-item-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
}

.task-checkbox {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
    accent-color: var(--primary);
}

.task-item-label {
    flex: 1;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
}

.task-item.completed .task-item-label {
    text-decoration: line-through;
    color: var(--text-tertiary);
}

.completed-by {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    padding-left: 2rem;
    font-weight: 500;
}

/* Группы */
.group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.group-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.group-type-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid var(--border);
}

/* Участники группы */
.group-members {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.group-members h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.members-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.member-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.member-email {
    flex: 1;
    font-weight: 500;
    color: var(--text-primary);
}

.member-role {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.btn-notify-member {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    width: 1.75rem;
    height: 1.75rem;
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0.8;
}

.btn-notify-member:hover {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
    background: #0891b2;
}

.btn-notify-member:active {
    transform: scale(0.95);
}

.btn-remove-member {
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius);
    width: 1.75rem;
    height: 1.75rem;
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0.7;
}

.btn-remove-member:hover {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Кнопки для элементов задач */
.btn-remove-task-item {
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius);
    width: 1.75rem;
    height: 1.75rem;
    cursor: pointer;
    font-size: 1.25rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    margin-left: auto;
    opacity: 0.7;
    flex-shrink: 0;
    box-sizing: border-box;
}

.btn-remove-task-item:hover {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
    background: #dc2626;
}

.btn-remove-task-item:active {
    transform: scale(0.95);
}

.btn-add-task-item {
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    width: 100%;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-add-task-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--primary);
    border-style: solid;
    box-shadow: var(--shadow-sm);
}

.btn-add-task-item:active {
    transform: scale(0.98);
    box-shadow: none;
}

/* Активные приглашения */
.group-invites {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.group-invites h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.invites-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.invite-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
}

.invite-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.invite-link {
    font-weight: 500;
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.875rem;
}

.invite-expires {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Модальные окна */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    overflow-y: auto;
    animation: fadeIn 0.2s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-primary);
    margin: 2rem auto;
    padding: 2rem;
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s;
    transition: background 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: var(--transition);
}

.close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.task-item-input {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.task-item-input input {
    flex: 1;
}

.btn-remove-item {
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius);
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.btn-remove-item:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.geo-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: background 0.3s ease;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
    font-weight: 500;
}

/* Приглашения */
.invite-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.invite-description {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 1rem;
}

.invite-link-container {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    flex-wrap: nowrap; /* Всегда в одну строку */
}

.invite-link-input {
    flex: 1;
    min-width: 0; /* Позволяет input сжиматься */
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: monospace;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    box-sizing: border-box;
}

#copy-invite-btn {
    flex-shrink: 0; /* Кнопка не сжимается */
    white-space: nowrap;
    min-width: fit-content;
    box-sizing: border-box;
}

#copy-invite-btn .btn-text {
    display: inline;
}

@media (max-width: 440px) {
    #copy-invite-btn .btn-text {
        display: none; /* Скрываем текст "Копировать" */
    }
    
    #copy-invite-btn {
        padding: 0.75rem;
        min-width: auto;
        width: auto;
    }
    
    .invite-link-input {
        font-size: 0.8rem;
        padding: 0.6rem;
    }
}

.invite-qr-container {
    display: flex;
    justify-content: center;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.invite-qr-container canvas,
.invite-qr-container img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
}

.invite-details {
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.invite-details p {
    margin: 0.5rem 0;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.status-active {
    color: var(--success);
    font-weight: 600;
}

.status-used {
    color: var(--text-tertiary);
    font-weight: 600;
}

.invite-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.invite-accept-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.invite-accept-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.invite-info-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.invite-info-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.invite-group-name {
    font-size: 1.25rem;
    color: var(--primary);
    margin: 1rem 0;
    font-weight: 600;
}

.invite-expires {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0.5rem 0;
}

.invite-description {
    color: var(--text-secondary);
    margin: 1rem 0;
    line-height: 1.6;
}

.invite-info {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 1rem;
    text-align: center;
}

.invite-info h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.invite-loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.invite-loading p {
    font-size: 1rem;
    margin: 0;
}

.invite-success,
.invite-error {
    text-align: center;
    padding: 2rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.invite-success h3 {
    color: var(--success);
    margin-bottom: 1rem;
}

.invite-error h3 {
    color: var(--danger);
    margin-bottom: 1rem;
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

.group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Адаптивность для средних экранов (361-500px) */
@media (max-width: 500px) and (min-width: 361px) {
    .container {
        padding: 0.5rem;
        max-width: 100%;
        box-sizing: border-box;
    }

    .tasks-list,
    .groups-list {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        width: 100%;
        min-width: 0;
    }

    .task-card,
    .group-card {
        padding: 0.75rem;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        margin: 0;
    }

    .task-header {
        gap: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .task-title {
        font-size: 1rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .task-description {
        font-size: 0.85rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .task-badges {
        gap: 0.4rem;
        flex-wrap: wrap;
    }

    .task-type-badge,
    .shared-badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }

    .task-items {
        gap: 0.5rem;
    }

    .task-item {
        padding: 0.5rem;
        box-sizing: border-box;
    }

    .group-header {
        gap: 0.5rem;
    }

    .group-header h3 {
        font-size: 1.1rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .group-members,
    .group-invites {
        margin-top: 1rem;
        padding-top: 1rem;
        width: 100%;
        min-width: 0;
        box-sizing: border-box;
    }

    .invites-list {
        width: 100%;
        min-width: 0;
    }

    .invite-item {
        width: 100%;
        min-width: 0;
        max-width: 100%;
        box-sizing: border-box;
        padding: 0.6rem;
        flex-wrap: wrap;
    }

    .invite-link {
        font-size: 0.8rem;
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        flex: 1 1 100%;
    }

    .invite-expires {
        font-size: 0.7rem;
        flex-shrink: 0;
        white-space: nowrap;
    }

    .invite-link-container {
        width: 100%;
        min-width: 0;
        flex-wrap: nowrap; /* Всегда в одну строку */
        gap: 0.4rem;
        box-sizing: border-box;
    }

    .invite-link-input {
        font-size: 0.8rem;
        min-width: 0;
        padding: 0.6rem;
    }
    
    #copy-invite-btn {
        flex-shrink: 0;
        padding: 0.5rem 0.6rem;
        font-size: 0.75rem;
    }
    
    #copy-invite-btn .btn-text {
        display: none; /* Текст скрыт на маленьких экранах */
    }

    .section-header {
        gap: 0.5rem;
        margin-bottom: 1rem;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .section-header .btn {
        font-size: 0.8rem;
        padding: 0.5rem 0.75rem;
    }

    .filter-buttons {
        gap: 0.3rem;
        margin-bottom: 1rem;
    }

    .filter-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
    }
}

/* Адаптивность для мобильных устройств */
@media (max-width: 640px) {
    .navbar {
        padding: 0.4rem 0;
        padding-top: max(0.4rem, env(safe-area-inset-top));
    }

    .nav-container {
        padding: 0 12px;
        min-height: 2.5rem;
        gap: 0.5rem;
    }

    .nav-title {
        font-size: 1.1rem;
    }

    .nav-actions {
        gap: 0.5rem;
        flex-shrink: 0;
    }

    .user-menu-trigger {
        min-width: auto;
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .user-menu-dropdown {
        right: 0;
        left: auto;
        min-width: 200px;
        max-width: 90vw;
    }
    
    .theme-toggle-menu .theme-toggle-btn {
        font-size: 0.8rem;
    }

    .container {
        padding: 0.75rem;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .tasks-list,
    .groups-list {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .task-card,
    .group-card {
        padding: 1rem;
    }

    .task-header {
        flex-direction: column;
        gap: 0.75rem;
    }

    .task-title {
        font-size: 1.1rem;
    }

    .task-badges {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .filter-buttons {
        gap: 0.4rem;
    }

    .filter-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
    }

    .modal-content {
        padding: 1.5rem;
        width: 95%;
        max-width: 95%;
    }

    .invite-link-container {
        flex-wrap: nowrap; /* Всегда в одну строку */
        gap: 0.4rem;
    }

    .invite-link-input {
        min-width: 0;
        font-size: 0.8rem;
        padding: 0.6rem;
    }

    #copy-invite-btn {
        flex-shrink: 0;
        padding: 0.6rem 0.75rem;
        font-size: 0.8rem;
    }
    
    #copy-invite-btn .btn-text {
        display: none; /* Текст скрыт на маленьких экранах */
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.875rem;
    }

    .btn-large {
        padding: 0.75rem 1.25rem;
        font-size: 1rem;
    }
}

/* Адаптивность для очень маленьких экранов (350px и меньше) */
@media (max-width: 360px) {
    .navbar {
        padding: 0.3rem 0;
        padding-top: max(0.3rem, env(safe-area-inset-top));
    }

    .nav-container {
        padding: 0 8px;
        min-height: 2rem;
        gap: 0.4rem;
    }

    .nav-title {
        font-size: 0.95rem;
        font-weight: 600;
    }

    .nav-actions {
        gap: 0.3rem;
    }

    .user-menu-trigger {
        padding: 0.3rem 0.5rem;
        font-size: 0.75rem;
        min-width: auto;
    }

    .user-menu-dropdown {
        min-width: 180px;
        max-width: calc(100vw - 16px);
        right: 8px;
    }

    .container {
        padding: 0.5rem;
    }

    .section-header {
        margin-bottom: 1rem;
        gap: 0.5rem;
    }

    .section-header h2 {
        font-size: 1.25rem;
    }

    .section-header .btn {
        width: 100%;
        padding: 0.5rem;
        font-size: 0.8rem;
    }

    .tabs {
        gap: 0.25rem;
        padding: 0.25rem;
    }

    .tab {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }

    .filter-buttons {
        gap: 0.3rem;
        margin-bottom: 1rem;
    }

    .filter-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.75rem;
        white-space: nowrap;
    }

    .tasks-list,
    .groups-list {
        gap: 0.75rem;
    }

    .task-card,
    .group-card {
        padding: 0.75rem;
        border-radius: var(--radius);
    }

    .task-header {
        margin-bottom: 0.75rem;
        gap: 0.5rem;
    }

    .task-title {
        font-size: 1rem;
        line-height: 1.3;
    }

    .task-description {
        font-size: 0.85rem;
        margin-top: 0.25rem;
    }

    .task-badges {
        gap: 0.4rem;
    }

    .task-type-badge,
    .shared-badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }

    .task-items {
        gap: 0.5rem;
    }

    .task-item {
        padding: 0.5rem;
    }

    .task-item-content {
        gap: 0.5rem;
    }

    .task-checkbox {
        width: 1rem;
        height: 1rem;
        flex-shrink: 0;
    }

    .task-item-label {
        font-size: 0.875rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .btn-remove-task-item {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 1rem;
        flex-shrink: 0;
    }

    .btn-add-task-item {
        padding: 0.4rem 0.75rem;
        font-size: 0.75rem;
    }

    .group-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .group-header h3 {
        font-size: 1.1rem;
    }

    .group-members,
    .group-invites {
        margin-top: 1rem;
        padding-top: 1rem;
    }

    .group-members h4,
    .group-invites h4 {
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }

    .member-item {
        padding: 0.5rem;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .member-email {
        font-size: 0.85rem;
        min-width: 0;
        flex: 1 1 100%;
    }

    .member-role {
        font-size: 0.75rem;
        padding: 0.2rem 0.4rem;
    }

    .btn-remove-member {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 1rem;
    }

    .invite-item {
        padding: 0.5rem;
        flex-direction: row;
        align-items: center;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .invite-link {
        font-size: 0.75rem;
        word-break: break-all;
        flex: 1 1 100%;
        min-width: 0;
        max-width: 100%;
    }

    .invite-expires {
        font-size: 0.7rem;
        flex: 0 0 auto;
    }

    .modal-content {
        padding: 1rem;
        margin: 1rem auto;
        width: calc(100% - 16px);
        max-width: calc(100% - 16px);
        max-height: calc(100vh - 2rem);
    }

    .modal-content h2 {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .form-group {
        margin-bottom: 0.75rem;
    }

    .form-group label {
        font-size: 0.85rem;
        margin-bottom: 0.4rem;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 0.6rem;
        font-size: 0.875rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.875rem;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        margin-bottom: 0.5rem;
    }

    .btn-large {
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
    }

    .btn-sm {
        padding: 0.3rem 0.6rem;
        font-size: 0.7rem;
    }

    .task-item-input {
        gap: 0.4rem;
    }

    .task-item-input input {
        font-size: 0.875rem;
    }

    .btn-remove-item {
        width: 2rem;
        height: 2rem;
        font-size: 1.1rem;
    }

    .invite-info-card {
        padding: 1rem;
    }

    .invite-info-card h3 {
        font-size: 1.2rem;
    }

    .invite-group-name {
        font-size: 1.1rem;
    }

    .invite-expires {
        font-size: 0.8rem;
    }

    .invite-description {
        font-size: 0.85rem;
    }

    .invite-accept-form {
        gap: 0.75rem;
    }

    .invite-info {
        padding: 0.75rem;
    }

    .auth-container {
        padding: 1rem;
        width: calc(100% - 16px);
        max-width: calc(100% - 16px);
    }

    .auth-container h2 {
        font-size: 1.5rem;
    }
        padding: 0.5rem 0.75rem;
    }

    .btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
    }

    #logout-btn {
        padding: 0.4rem 0.75rem;
    }

    .container {
        padding: 10px;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .tabs {
        flex-direction: column;
    }

    .tasks-list,
    .groups-list {
        grid-template-columns: 1fr;
    }

    .modal-content {
        margin: 1rem auto;
        padding: 1.5rem;
        width: 95%;
    }

    .task-header {
        flex-direction: column;
    }

    .task-badges {
        flex-direction: row;
        align-items: center;
    }

    .geo-inputs {
        grid-template-columns: 1fr;
    }

    .theme-toggle {
        gap: 0.15rem;
        padding: 0.15rem;
    }

    .theme-toggle-btn {
        width: 1.5rem;
        height: 1.5rem;
        padding: 0.3rem;
        font-size: 0.75rem;
    }

    .container {
        padding: 10px;
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }

    .auth-container {
        margin: 1rem auto;
        padding: 1.5rem 1rem;
    }

    .screen {
        min-height: calc(100vh - 3rem);
        min-height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 3rem);
    }
}

/* Анимации */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Скроллбар */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}