/* 共通ヘッダーのスタイル */
.common-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0;
    margin: 0 0 20px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    flex-wrap: wrap;
}

.logo h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-item {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-item:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.nav-item.active {
    background: rgba(255,255,255,0.3);
    font-weight: 600;
}



/* レスポンシブ対応 */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        justify-content: center;
        gap: 10px;
    }
    
    .nav-item {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}