*{
  box-sizing: border-box;
}

body{
  margin: 0;
  display: flex;
  flex-flow: column;
  min-height: 100vh;
  background-color: rgb(231, 231, 231); 
}
  /* logo */
  H1 { 
    margin: 0;
  }
  H3 {
    background-color: #e4e4e4;
    padding: 10px 15px;
  } 

header{
  background-color: rgb(97 97 97 / 58%);
  width: 100%;
  height: 60px;
  line-height: 60px;
  text-align: left;
  position: fixed;
  z-index: 10;
  backdrop-filter: blur(20px);
}
  .home {
    float: right;
    font-size: 13px;
    color: rgb(236, 236, 236);
    margin: 0 20px 0 0;
    font-weight: bold;
  }
  .title-logo{
    line-height: 72px;
    display: inline-block;
    margin-left: 20px;
  }
  .title-logo img{
    height: 34px;
  }

.main{
  flex:1;
  margin-top: 59px;
}
  .back {
    width: 700px;
    background-color: white;
    margin: 20px auto;
    padding: 20px 40px 40px;
  }
  .session {
    font-size: 13px;
  }
  p {
    padding: 0 10px;
  }
  li {
    font-size: 12px;
  }

.footer {
  width: 100%;
  font-size: 12px;
  font-weight: bold;
  background-color:black;
  padding:30px;
  text-align: center;
  color: gray;
}
  .footer-top {
    /* background-color:pink ; */
  }
  .policy,.mail-form {
    display: inline-block;
    margin: 0 10px 20px;
  }
  .footer-bottom {
    /* background-color:skyblue ; */

  }