body {
  font-family: Arial, sans-serif;
  margin: 0;
}

header {
  background-color: #f2f2f2;
  color: #333;
  text-align: center;
  padding: 10px;
}


nav {
  text-align: left;
  max-height: 30px;
}


nav ul {
  display: flex;
  list-style: none;
  text-align: left;
  padding-inline-start: 0px;
}

nav li {
  margin-right: 10%;
  text-align: left;
}

nav li a {
  color: #333;
  text-decoration: none;
}

nav li:hover {
  background-color: #537DB7;
}

nav li ul {
  display: none;
  position: absolute;
  background-color: #537DB7;
  padding: 0;
}

nav li:hover ul {
  display: flex;
  flex-direction: column;
}

nav li ul li {
  margin: 0;
}

nav li ul li a {
  color: #333;
  padding: 10px;
}





.head_table {
  width: 100%;
  padding: 0px;
  margin-bottom: 0px;
  border: 0px solid #ddd;
  border-radius: 5px;
}

.container_nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: start;
  padding: 0px;
  max-height: 30px;
}

.container_head {
  display: flex;
  flex-wrap: wrap;
  justify-content: start;
  padding: 0px;
}

.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 5px;
  vertical-align: top;
}

.column {
  width: 48%;
  padding: 10px;
  margin-bottom: 20px;
  background-color: #f2f2f2;
  border: 1px solid #ddd;
  border-radius: 5px;
}

.column_topic {
  width: 20%;
  padding: 10px;
  margin-bottom: 20px;
  background-color: #f2f2f2;
  border: 1px solid #ddd;
  border-radius: 5px;
}

.column_content {
  width: 70%;
  padding: 10px;
  margin-bottom: 20px;
  background-color: #f2f2f2;
  border: 1px solid #ddd;
  border-radius: 5px;
}


.row {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
}


.form-control {
  display: block;
  width: 100%;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
  margin-bottom: 10px;
}
button {
  background-color: #333;
  color: #fff;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 4px;
}
button:hover {
  background-color: #444;
}



@media screen and (max-width: 768px) {
  .container {
    flex-direction: column;
  }
  .column {
    width: 100%;
  }
  .column_topic {
    width: 100%;
  }
  .column_content {
    width: 100%;
  }
}

footer {
  background-color: #f2f2f2;
  color: #333;
  text-align: center;
  padding: 20px;
}



.box img {
    width: 100%;
    height: 100%;
    max-width: 130px;
}

.box1 img {
    object-fit: cover;
}

.box2 img {
    object-fit: contain;
}

.box3 img {
    object-fit: fill;
}