style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body, .box {
    width: 100%;
    height: 100%;
    background: #2a2a2a;
}
.box {
    display: flex;
    justify-content: center;
    align-items: center;
    filter: blur(5px) contrast(10);
    mix-blend-mode: screen;
}
.visualizer {
    position: relative;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: #fff;
    transition: .5s;
    transform: rotateZ(180deg);
}
.play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    background: #2a2a2a;
    border-radius: 50%;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
}
.btn-play {
    border-left: 80px solid #5f5;
    border-bottom: 50px solid transparent;
    border-top: 50px solid transparent;
    cursor: pointer;
}
.btn-pause {
    border-right: 20px solid #5f5;
    border-left: 20px solid #5f5;
    width: 75px;
    height: 100px;
    cursor: pointer;
}

/* The basic shape of the microphone */
.btn-mic {
    width: 60px;
    height: 100px;
    background-color: #5f5;
    border-radius: 30px 30px 0 0;
    position: relative;
    cursor: pointer;
}

/* The bottom circular stand of the microphone */
.btn-mic::before {
    content: "";
    width: 40px;
    height: 20px;
    background-color: #5f5;
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 50%;
}

/* A horizontal line that represents the microphone's off state (microphone with a strikethrough) */
.btn-mic-off::after {
    content: "";
    width: 110%;
    height: 8px;
    background-color: #f00;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
}

.element {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: inline-block;
    width: 50px;
    height: 50px;
    border-radius: 10px;
    border-top: 40px solid #fff;
    border-right: 20px solid transparent;
    border-left: 20px solid transparent;
    transform-origin: top left;
    transition: .25s;
}