/* 전체 레이아웃 */
.app-container {
    display: flex;
    min-height: 100vh;
    background-color: var(--bg-primary, #f5f5f5);
}

/* 왼쪽 사이드바 */
.sidebar {
    width: 250px;
    background-color: #1a2332; /* 파랑과 검정 사이의 어두운 파란색 */
    color: white;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

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

.sidebar-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: bold;
    color: white;
}

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

.menu-item {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
    transition: background-color 0.3s;
    border-left: 3px solid transparent;
}

.menu-item:hover {
    background-color: rgba(59, 130, 246, 0.15); /* 옅은 파란색 */
    border-left-color: #3b82f6;
}

.menu-item.active {
    background-color: rgba(59, 130, 246, 0.25); /* 활성 메뉴는 조금 더 진한 옅은 파란색 */
    border-left-color: #3b82f6;
}

.menu-icon {
    font-size: 20px;
    margin-right: 12px;
    width: 24px;
    text-align: center;
}

.menu-text {
    font-size: 16px;
    font-weight: 500;
}

/* 오른쪽 콘텐츠 영역 */
.content-area {
    flex: 1;
    margin-left: 250px;
    padding: 30px;
    min-height: 100vh;
    background-color: var(--bg-primary, #ffffff);
    color: var(--text-primary, #1e293b);
}

.page-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* 기능 카드 */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-card {
    background: var(--bg-secondary, white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color, #e2e8f0);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.feature-card h3 {
    margin-top: 0;
    color: var(--text-primary, #2c3e50);
}

.feature-card p {
    color: var(--text-secondary, #666);
    margin-bottom: 20px;
}

.btn-primary {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--button-bg, #3498db);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: var(--button-hover, #2980b9);
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .content-area {
        margin-left: 200px;
        padding: 20px;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
    }
}