:root{
    --mint-green: #daffedff;
    --cinnabar: #f4442eff;   
    --oxford-blue: #070529;        
}

* {
    margin: 0;
    padding: 0;
    overflow: hidden;
    box-sizing: border-box;
}

html {
    width: 100vw;
    height: 100vh;

    font-size: 100%;
}

body {
    max-width: 100vw;
    height: 100vh;
    
    background-color: var(--oxford-blue);
    color: var(--mint-green);
}

button{
    outline: none;
    border: none
}

#main {
    width: 100%;
    height: 100%;
    
    display: flex;
    justify-content: center;
    align-items: center;
}

.button-container {
    width: 70%;
    height: 60%;
    min-height: fit-content;
    
    display: flex;
    flex-flow: row wrap;
    justify-content: space-around;
    align-items: center;
}

.sound-button {
    width: 17%;
    min-width: 150px;
    aspect-ratio: 1/0.6;
    border: solid 4px;
    border-radius: 30px;

    font-size: 1.4em;

    background-color: transparent; 
    color: var(--mint-green);

    cursor: pointer;

    transition-property: background, color;
    transition-duration: 100ms;
    transition-timing-function: ease-in-out;
}

.sound-button:active{
    background-color: var(--mint-green);
    color: var(--oxford-blue);

    transition-duration:  50ms;
    transition-timing-function: ease-in-out;
}

.sound-button:hover{
    color: var(--cinnabar)
}