html {
    min-height: 100%;
  }
body {
    background-color: rgb(32, 31, 31);
    min-height: 100%;
    margin: 0;
}

#openclosebtn {
    background-color: #4CAF50;
    border: none;
    color: white;
    padding: 20px;
    text-align: center;
    text-decoration: none;
    display:inline-block;
    font-size: 3vh;
    cursor: pointer;
    border-radius: 0.65vh;
    width: 50%;
    height: 10%;
}

#keepopenbtn {
    background-color: #008CBA;
    border: none;
    color: white;
    padding: 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 2vh;
    cursor: pointer;
    border-radius: 0.65vh;
    width: 25%;
    height: 10%;
    top: 0px;
    margin-top: 0px;
    margin-left: 3%;
    vertical-align: top;
}

#openclosebtn:hover {
    background-color: #3e8e41;
}

#keepopenbtn:hover {
    background-color: #097194;
}

#openclosebtn:disabled, #keepopenbtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#spacer {
    height: 85%;
}

#btns {
    margin: auto;
    align-content: center;
    text-align: center;
    max-height: 10%;
}