/* Reset some default styles */

body, h1, h2, p, ul, li {
  margin: 0;
  padding: 0;
}


body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
}


header {
  background-color: #FFFFFF;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}


.logo img {
  height: 43px;
}


.menu {
  list-style: none;
}

.menu li {
  display: inline-block;
  margin-right: 20px;
}


.menu li a {
  color: #333;
  text-decoration: none;
  padding: 10px;
}


.menu li a:hover {
  background-color:  #d6eaf8;
  border-radius: 5px;
}


.submenu {
  display: none;
  position: absolute;
  background-color:  #ebf5fb;
  padding: 10px;
  border-radius: 5px;
}


.menu li:hover .submenu {
  display: block;
}


.introduction {
  background-color:  #d6eaf8;
  padding: 20px;
}


.introduction h2 {
  color: #333;
}
.toeic-listening, .toeic-reading, .toeic-mock-test, .latest-blog-posts, .learn-more, .lecture-quiz-table, .quiz-list {
  padding: 20px;
}


.toeic-listening ul {
  padding: 20px;
}

.toeic-reading ul {
  padding: 20px;
}


.ad-box {
  background-color: #FFFFFF;
  padding: 10px;
  text-align: center;
}


footer {
  background-color: #f0f0f0;
  padding: 10px;
  text-align: center;
}

/* Add this media query to adjust the layout for mobile phones */

@media (max-width: 767px) {
  header {
    flex-direction: column;
  }

  
.menu {
    text-align: left;
    margin-top: 10px;
  }

  
.menu li {
    display: block;
    margin-bottom: 10px;
  }

  
.submenu {
    position: static;
    background-color: transparent;
    padding-left: 10px;
    border-radius: 0;
  }

  
.menu li:hover .submenu {
    display: block;
  }

  
.menu li:hover > a {
    background-color: #d6eaf8;
    border-radius: 5px;
  }

  
.menu li:hover {
    background-color: transparent;
  }
}