HTMLify

*{
    margin: 0;
    padding: 0;
    font-family: "sans";    
}

@font-face {
    font-family: "sans";
    src: url(font/sans.ttf);
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 90vh;
    background: #19172e;
    color: white;
}

h1{
    position: fixed;
    justify-content: center;
    align-items: center;
    text-align: center;
    top: 0;
    padding-top: 120px;
}
h2{
    margin-bottom: 20px;
}

#start-button{
    position: absolute;
    cursor: pointer;
    color: #fff;
    background: #333;
    font-size: 1rem;
    padding: 15px;
    border: none;
    border-radius: 8px;
    bottom: 0;
    margin-bottom: 280px;
}

#start-button:active{
    background: #1e8e3e;

}
#container {
    height: 200px;
    width: 700px;
    background-color: #F5E4C3;
    margin: 0 auto;
    border: 5px solid #88B169;
    color: #19172e;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(3, 1fr);
}

/*label*/
.label {
    margin: 0;

    justify-self: center;
    align-self: center;
    font-size: 30px;
}

#hour-label {
    grid-area: 1 / 2 / 1 / 3;
}

#min-label {
    grid-area: 1 / 3 / 1 / 4;
}

#sec-label {
    grid-area: 1 / 4 / 1 / 5;
}

/*times*/
.time {
    justify-self: center;
    align-self: center;

    border: none;
    background-color: #ffffff00;
    font-size: 50px;
    width: 70px;
    height: 50px;
}

#hour {
    grid-area: 2 / 2 / 2 / 3;
}

.semicolon {
    justify-self: center;
    align-self: center;

    font-size: 30px;
    margin: 0;
}
#p1 {
    grid-area: 2 / 2 / 2 / 4;
}

#minute {
    grid-area: 2 / 3 / 2 / 4;
}

#p2 {
    grid-area: 2 / 3 / 2 / 5;
}

#sec {
    grid-area: 2 / 4 / 2 / 5;
}

/*buttons*/

.btn {
    align-self: center;
    
    width: 100px;
    height: 40px;

    font-size: 30px;
    justify-self: center;
}

#start {
    grid-area: 3 / 2 / 3 / 4;
}

#reset {
    grid-area: 3 / 3 / 3 / 5;
    display: none;
}

#pause {
    grid-area: 3 / 4 / 3 / 6;
    display: none;
}
footer {
    text-align: center;
    color: white;
    font-size: 1rem;
    position:fixed;
    left: 0;
    right: 0;
    bottom: 0;
    margin-bottom: 0;
    padding: 5px;
    line-height: 3vh;
}

footer a:visited {
    color: inherit;
}

#centered-text {
    text-align: center;
  }