*{
    box-sizing: border-box;
}
body{
    margin: 0;
    padding: 0;
    background-color: #34495e;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    font-family: sans-serif;
}

.container{
    width: 500px;
    height: 500px;
    background-color: #ccc;
    border-radius: 50%;
    border: 15px solid #dde;
    position: relative;
    overflow: hidden;
    transition: transform 5s ease-out;
}

.container div{
    height: 50%;
    width: 40%;
    position: absolute;
    clip-path: polygon(100% 0, 50% 100%, 0 0);
    transform-origin: bottom center;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    color: #fff;
    left: 50%;
}

.container .one{
    background-color: #3f51b5;
    transform: translateX(-50%) rotate(0deg);
}
.container .two{
    background-color: #ff9800;
    transform: translateX(-50%) rotate(45deg);
}
.container .three{
    background-color: #e91e63;
    transform: translateX(-50%) rotate(90deg);
}
.container .four{
    background-color: #4caf50;
    transform: translateX(-50%) rotate(135deg);
}
.container .five{
    background-color: #009688;
    transform: translateX(-50%) rotate(180deg);
}
.container .six{
    background-color: #795548;
    transform: translateX(-50%) rotate(225deg);
}
.container .seven{
    background-color: #9c27b0;
    transform: translateX(-50%) rotate(270deg);
}
.container .eight{
    background-color: #f44336;
    transform: translateX(-50%) rotate(315deg);
}

.arrow{
    position: absolute;
    top: calc(50vh - 250px - 15px - 30px);
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    z-index: 5;
}
.arrow::before{
    content: '\25BC';
    font-size: 50px;
}

#spin{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    background-color: #e2e2e2;
    text-transform: uppercase;
    border: 8px solid #fff;
    font-weight: bold;
    font-size: 20px;
    color: #898989;
    width: 100px;
    height: 100px;
    font-family: sans-serif;
    border-radius: 50%;
    cursor: pointer;
    outline: none;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .container {
        width: 85vmin;
        height: 85vmin;
        border-width: 10px;
    }

    .container div {
        font-size: 3vmin;
        font-size: max(12px, 3vmin);
    }

    .arrow {
        top: calc(50vh - (85vmin / 2) - 10px - 3vmin);
    }
    .arrow::before {
        font-size: 7vmin;
        font-size: max(30px, 7vmin);
    }

    #spin {
        width: 20vmin;
        height: 20vmin;
        max-width: 80px;
        max-height: 80px;
        font-size: 2.5vmin;
        font-size: max(10px, 2.5vmin);
        border-width: 5px;
    }
}

@media (max-width: 480px) {
    .container {
        width: 90vmin;
        height: 90vmin;
        border-width: 8px;
    }
    .container div {
        font-size: max(10px, 3.5vmin);
    }
    .arrow {
        top: calc(50vh - (90vmin / 2) - 8px - 2.5vmin);
    }
    .arrow::before {
        font-size: max(25px, 6vmin);
    }
    #spin {
        width: 22vmin;
        height: 22vmin;
        max-width: 70px;
        max-height: 70px;
        font-size: max(9px, 3vmin);
        border-width: 4px;
    }
}