.rounded {
    -webkit-border-radius: 6px;
    -moz-border-radius: 6px;
    -ms-border-radius: 6px;
    -o-border-radius: 6px;
    border-radius: 6px;
}

.trans {
    -webkit-transition: all 0.1s ease-in-out;
    -moz-transition: all 0.1s ease-in-out;
    transition: all 0.1s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    border: none;
    list-style: none;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

body {
    font: 15px/1.25 "Alef";
    color: #111;
}

form {
    margin: 70px auto;
    background: #2a3644;
    width: 347px;
    text-align: center;
    padding: 40px;
    -webkit-border-radius: 6px;
    -moz-border-radius: 6px;
    -ms-border-radius: 6px;
    -o-border-radius: 6px;
    border-radius: 6px;
}

form > h1 {
    color: #f4f4f4;
    text-shadow: 1px 1px 0px rgba(0, 0, 0, 0.7);
    font-weight: 400;
    margin-bottom: 20px;
  }

  /* 追記 */
  h5 {
    color: #b71a1a;
    margin-bottom: revert;
  }
  
  input {
    background: rgba(0, 0, 0, 0.2);
    color: #fff;
    text-shadow: 1px 1px 0px rgba(0, 0, 0, 0.3);
    display: block;
    width: 269px;
    padding: 15px;
    margin-bottom: 10px;
    -webkit-border-radius: 6px;
    -moz-border-radius: 6px;
    -ms-border-radius: 6px;
    -o-border-radius: 6px;
    border-radius: 6px;
    -webkit-transition: all 0.1s ease-in-out;
    -moz-transition: all 0.1s ease-in-out;
    transition: all 0.1s ease-in-out;
    outline: none;
  }
  
  input:focus {
    background: rgba(0, 0, 0, 0.1);
    -webkit-transition: all 0.1s ease-in-out;
    -moz-transition: all 0.1s ease-in-out;
    transition: all 0.1s ease-in-out;
  }
  
  ::-webkit-input-placeholder {
    color: rgba(225, 225, 225, 0.4);
  }
  
  :-moz-placeholder {
    color: rgba(225, 225, 225, 0.4);
  }
  
  ::-moz-placeholder {
    color: rgba(225, 225, 225, 0.4);
  }
  
  :-ms-input-placeholder {
    color: rgba(225, 225, 225, 0.4);
  }
  
  button {
    position: relative;
    display: block;
    margin-top: 15px;
    margin-bottom: 15px;
    padding: 17px;
    width: 270px;
    -webkit-border-radius: 6px;
    -moz-border-radius: 6px;
    -ms-border-radius: 6px;
    -o-border-radius: 6px;
    border-radius: 6px;
    -webkit-transition: all 0.1s ease-in-out;
    -moz-transition: all 0.1s ease-in-out;
    transition: all 0.1s ease-in-out;
    font-size: 1.2em;
    background: #f26964;
    color: #f4f4f4;
    box-shadow: 0px 3px 0px #ab4b47;
    cursor: pointer;
  }
  
  button:active {
    top: 3px;
    box-shadow: none;
  }