*, *::before, *::after
{
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}
body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.piano {
    display: flex;
    background-color: white;
}

.key {
    height: calc(var(--width) * 4);
    width: var(--width);
    text-align: center;
    font-size: 1em;
    font-weight: 600;
}

.white {
    --width: 100px;
    background-color: #fffdfd;
    border: 3px solid #020000;
}

.white.active {
    background-color: #8f8a8a;
}

.black {
    --width: 60px;
    background-color: black;
    margin-left: calc(var(--width) / -2);
    margin-right: calc(var(--width) / -2);
    z-index: 2;
    color: white;
}

.black.active {
    background-color: #171616;
}

header
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 40px 100px;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
header .logo
{
    color: #fff;
    text-transform: uppercase;
    cursor: pointer;
}

.showcase video
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}
.overlay
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #2d2c2c;
    mix-blend-mode: overlay;
}
.logo a{
    color: #fff;
    text-transform: uppercase;
    cursor: pointer;
    text-decoration: none;
}