.slider {
    position: relative;
    /*width: 100%;*/
    max-width: 100%; /* пример */
    /*margin: 0 auto;*/
    overflow: hidden;
}

.slider__track-wrapper {
    overflow: hidden;
}

.slider__track {
    display: flex;
    transition: transform 0.5s ease;
}

.slider__item {
    min-width: 100%;
    box-sizing: border-box;
}

.slider__image {
    display: block;
    width: 100%;
    height: auto;
    max-height: 500px;
    border-radius: 10px;
}

/* кнопки */
.slider__control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.4);
    color: #fff;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 10px;
    border-radius: 50%;
    z-index: 10;
}

.slider__control--prev {
    left: 10px;
}

.slider__control--next {
    right: 10px;
}