body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(black, gray, silver, gray, black);
}

.macbook {
    font-size: 10px;
    width: 50em;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.screen {
    width: 40em;
    height: calc(40em * 0.667);
    box-sizing: border-box;
    border: black solid;
    border-width: 1.8em 1.3em 1.7em 1.3em;
    border-radius: 3% 3% 0 0 / 5%;
    box-shadow: 0 0 0 0.1em silver;
    background: radial-gradient(
        circle at right bottom,
        rgba(255, 255, 255, 0.4) 33em,
        rgba(255, 255, 255, 0.6) 33em
    ), black;
}

.base {
    width: inherit;
    height: 1.75em;
    border-radius: 0 0 10% 10% / 0 0 50% 50%;
    --top: linear-gradient(
        to right,
        hsla(0, 0%, 0%, 0.5) 0%,
        hsla(100, 100%, 100%, 0.8) 1%,
        hsla(0, 0%, 0%, 0.4) 4%,
        transparent 15%,
        hsla(100, 100%, 100%, 0.8) 50%,
        transparent 85%,
        hsla(0, 0%, 0%, 0.4) 96%,
        hsla(100, 100%, 100%, 0.8) 99%,
        hsla(0, 0%, 0%, 0.5) 100%
    ) no-repeat top / 100% 55%;
    --bottom: linear-gradient(
        white 55%,
        #999 60%,
        #222 90%,
        hsla(0, 0%, 0%, 0.1) 100%
    );
    background: var(--top), var(--bottom);
}

.base::before {
    content: '';
    position: absolute;
    width: 7em;
    height: 0.7em;
    border-radius: 0 0 7% 7% / 0 0 95% 95%;
    left: calc(50% - 7em / 2);
    box-shadow: 
        inset -0.5em -0.1em 0.3em rgba(0, 0, 0, 0.2),
        inset 0.5em 0.1em 0.3em rgba(0, 0, 0, 0.2);
    background-color: #ddd;
}