:root {
    --primary: #2c3e50;
    --accent: #3498db;
    --accent-hover: #2980b9;
    --success: #27ae60;
    --danger: #e74c3c;
    --danger-hover: #c0392b;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-light: #64748b;
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    overflow: hidden;
    padding: 0;
    margin: 0;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Шапка (не скроллится) */
.header {
    flex-shrink: 0;
    background: white;
    padding: 16px 24px 0 24px;
    border-bottom: 1px solid var(--border);
}

.user-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.refresh-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
}

.refresh-btn:hover {
    background: var(--accent-hover);
    transform: rotate(180deg);
}

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

#logoutBtn:hover {
    background: var(--danger-hover);
}

.navigation-bar {
    margin-bottom: 12px;
}

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

.breadcrumb-item {
    background: #f1f5f9;
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}
.breadcrumb-item:hover {
    background: var(--accent);
    color: white;
}
.breadcrumb-separator {
    color: var(--text-light);
    font-size: 1.2rem;
}

/* Скроллируемая область */
.scrollable-content {
    flex: 1;
    overflow-y: auto;
    padding: 0 24px 24px 24px;
    scroll-behavior: smooth;
}

/* Основной контент (заглушка) */
#main-content {
    animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
h1 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary);
}
p, ul {
    margin-bottom: 16px;
    line-height: 1.6;
    color: var(--text);
}
ul {
    padding-left: 24px;
}

/* Фиксированные кнопки внизу */
.bottom-buttons {
    flex-shrink: 0;
    background: white;
    border-top: 1px solid var(--border);
    padding: 12px 24px;
    /* безопасная зона для iPhone */
    padding-bottom: calc(12px + constant(safe-area-inset-bottom));
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
}

/* Для обычного браузера (не PWA) увеличиваем отступ */
body:not(.pwa-mode) .bottom-buttons {
    padding-bottom: 70px;
}
@media (max-width: 600px) {
    body:not(.pwa-mode) .bottom-buttons {
        padding-bottom: 70px;
    }
}

.action-buttons, .action-form {
    display: flex;
    gap: 12px;
}
.action-btn {
    background: white;
    border: 2px dashed var(--border);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    flex: 1;
    text-align: center;
    transition: all 0.2s;
}
.action-btn:hover {
    border-color: var(--accent);
    background: #f0f9ff;
}
.action-form input {
    flex: 2;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}
.action-form button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    flex: 1;
}
.action-form button:hover {
    background: var(--accent-hover);
}

/* Уведомления */
.global-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.8);
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    z-index: 2000;
    font-size: 0.9rem;
    pointer-events: none;
}
.global-notification.success { background: var(--success); }
.global-notification.error { background: var(--danger); }

/* Адаптив для мобильных */
@media (max-width: 600px) {
    .header {
        padding: 12px 16px 0 16px;
    }
    .scrollable-content {
        padding: 0 16px 16px 16px;
    }
    .breadcrumb-item {
        font-size: 0.8rem;
        padding: 4px 10px;
    }
    .bottom-buttons {
        padding: 12px 16px;
    }
    .action-btn {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
    .action-form {
        flex-direction: column;
    }
    .action-form input, .action-form button {
        width: 100%;
    }
}

/* Контейнеры для элементов */
.items-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 16px 0;
}
.item-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: #f8fafc;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.2s;
}
.item-card:hover {
    background: #f1f5f9;
}
.item-icon { font-size: 1.4rem; margin-right: 12px; }
.item-name { flex: 1; font-weight: 500; }
.item-actions {
    display: flex;
    gap: 8px;
}
.item-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}
.item-actions button:hover {
    background: #e2e8f0;
}
.item-checkbox {
    margin-right: 12px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}
.item-text.completed {
    text-decoration: line-through;
    color: #94a3b8;
}
.add-btn, .back-btn {
    margin-top: 12px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}
.add-btn {
    background: var(--accent);
    color: white;
}
.add-btn:hover { background: var(--accent-hover); }
.back-btn {
    background: #e2e8f0;
    color: var(--text);
}
.back-btn:hover { background: #cbd5e1; }
.add-item-form {
    display: flex;
    gap: 12px;
    margin-top: 12px;
}
.add-item-form input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}
.add-item-form button {
    padding: 10px 20px;
}
.empty-state {
    color: var(--text-light);
    text-align: center;
    padding: 30px 0;
}
.username {
    font-weight: 600;
    color: var(--primary);
}