*, ::before, ::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.container {

    font-family: Arial, Helvetica, sans-serif;
    background: #333;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;

}

.container-couleurs,
.container-range,
.container-btns {

    width: 30%;
    max-width: 400px;
    min-width: 300px;
    display: flex;
    justify-content: center;
    align-items: center;

}

.container-couleurs {

    flex-direction: column;

}

input {

    width: 100%;
    outline: none;
    border-radius: 15px;
    padding: 15px;
    border: 2px solid #f1f1f1;
    margin: 5px 0;
    font-size: 25px;
    font-weight: bold;

}

.container-btns {

    align-items: center;

}

button {

    width: 60px;
    height: 60px;
    border: none;
    outline: none;
    border-radius: 15px;
    margin: 5px;
    padding: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;

}

button img {

    width: 30px;
    pointer-events: none;

}

.random {

    width: 200px;
    height: 60px;
    font-size: 25px;

}

button p {

    pointer-events: none;

}

span {

    text-align: center;
    font-size: 20px;
    margin-top: 20px;

}