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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f0f2f5;
    color: #333;
    min-height: 100vh;
}

.admin-container {
    display: flex;
    min-height: 100vh;
}

/* Сайдбар */
.sidebar {
    width: 260px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 100;
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 {
    font-size: 20px;
    margin-bottom: 10px;
}

.user-badge {
    font-size: 12px;
    opacity: 0.9;
    padding: 8px 12px;
    background: rgba(255,255,255,0.1);
    border-radius: 6px;
}

.sidebar-nav {
    padding: 20px 0;
}

.nav-btn {
    width: 100%;
    display: flex;
    align-items: center;
    padding: 14px 20px;
    border: none;
    background: none;
    color: white;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    font-size: 15px;
}

.nav-btn:hover {
    background: rgba(255,255,255,0.1);
}

.nav-btn.active {
    background: rgba(255,255,255,0.2);
    border-left: 4px solid #fff;
}

.nav-icon {
    font-size: 20px;
    margin-right: 12px;
}

.nav-text {
    flex: 1;
}

/* Основной контент */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
}

.content-header {
    background: white;
    padding: 20px 30px;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    align-items: center;
    gap: 15px;
}

.content-header h1 {
    font-size: 24px;
    color: #333;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #667eea;
}

.content-body {
    padding: 30px;
    flex: 1;
}

/* Карточки */
.card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}

.card h3 {
    margin-bottom: 16px;
    color: #333;
    font-size: 18px;
}

/* Формы */
input[type="text"],
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s;
    margin-bottom: 16px;
    font-family: inherit;
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: #667eea;
}

textarea {
    resize: vertical;
    min-height: 120px;
}

/* Кнопки */
.btn-primary {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-primary:active {
    transform: translateY(1px);
}

/* Табы */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s;
}

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

/* Адаптивность для мобильных */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .content-body {
        padding: 20px;
    }
}

/* Скроллбар */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.3);
    border-radius: 3px;
}