:root {
    --primary: #2c3e50;
    --accent: #3498db;
    --accent-hover: #2980b9;
    --success: #27ae60;
    --danger: #e74c3c;
    --danger-hover: #c0392b;
    --light-bg: #f5f7fa;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-light: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text);
    line-height: 1.5;
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    padding: 24px;
}

.user-info {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border);
}

.user-info span {
    font-weight: 600;
    color: var(--primary);
    background: #f1f5f9;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
}

#logoutBtn {
    background: var(--danger);
    color: white;
    border: none;
    padding: 6px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
    font-weight: 500;
}

#logoutBtn:hover {
    background: var(--danger-hover);
    transform: translateY(-1px);
}

/* Навигационная панель */
.navigation-bar {
    background: #f8fafc;
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.back-btn {
    background: white;
    border: 1px solid var(--border);
    color: var(--accent);
    padding: 6px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.back-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.breadcrumb-item {
    background: white;
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb-item:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.breadcrumb-separator {
    color: var(--text-light);
    font-size: 1.2rem;
}

/* Содержимое папки */
.folder-content, .list-view {
    animation: fadeIn 0.2s ease;
}

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

#current-folder-name, #current-list-name {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.items-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 20px 0;
}

/* Карточка элемента (папка или список) */
.item-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s;
    cursor: pointer;
}

.item-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
    border-color: var(--accent);
}

.item-card.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.item-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.item-name {
    flex: 1;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text);
}

.item-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.item-actions button {
    background: none;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.item-actions button:hover {
    background: #f1f5f9;
}

.edit-btn { color: var(--accent); }
.delete-btn { color: var(--danger); }

/* Чекбокс для элементов списка */
.item-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--success);
    flex-shrink: 0;
}

.item-text {
    flex: 1;
    font-size: 1rem;
}

.completed {
    text-decoration: line-through;
    opacity: 0.6;
}

/* Кнопки добавления */
.add-buttons {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 2px solid var(--border);
}

.add-btn {
    background: white;
    border: 2px dashed var(--border);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.add-btn:hover {
    border-color: var(--accent);
    background: #f0f9ff;
    transform: translateY(-2px);
}

.add-form {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.add-form input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    outline: none;
    transition: border 0.2s;
}

.add-form input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(52,152,219,0.1);
}

.add-form button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.add-form button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-light);
    background: #f8fafc;
    border-radius: var(--radius-sm);
    font-style: italic;
}

/* Модальное окно для создания папки */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 24px;
    border-radius: var(--radius);
    max-width: 400px;
    width: 90%;
}

.modal-content h3 {
    margin-bottom: 16px;
}

.modal-content input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.modal-buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.modal-buttons button {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.modal-buttons button:first-child {
    background: var(--border);
}

.modal-buttons button:last-child {
    background: var(--accent);
    color: white;
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    .container {
        padding: 16px;
    }
    .breadcrumb-item {
        font-size: 0.8rem;
        padding: 4px 10px;
    }
    .item-card {
        padding: 10px 12px;
    }
    .item-icon {
        font-size: 1.2rem;
    }
    .add-buttons {
        flex-direction: column;
    }
}