.slider {
    position: relative;
    background: #eee;
    background-size: cover;
    background-position: center center;
    display: grid;
    grid-template-columns: 4rem 1fr 4rem;
    grid-template-rows: 1fr;
    height: 350px;
    background-size: cover;
    background-position: center center;
    max-width: 900px;
    border-radius: 10px;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
    margin: 40px auto;
    overflow: hidden;
}
.slider-slides {
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
}
.slider-slide {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    opacity:0;
    z-index: 0;
}
.slider-slide.is-active {
    opacity: 1;
    z-index: 1;
}

/* animacja */
.slider-slide {
    opacity: 0;
    transition:0.4s all;
}
.slider-slide.is-active {
    opacity: 1;
}

/* prev / next */
.slider-nav {
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    display: grid;
    grid-template-columns: 4rem 1fr 4rem;
    grid-template-rows: 1fr;
}
.slider-button-prev,
.slider-button-next {
    cursor: pointer;
    z-index: 2;
    background: rgba(0,0,0,0.1);
    border:0;
    text-indent:-999px;
    overflow:hidden;
    position: relative;
    z-index: 1;
    background-size: 30px;
    background-repeat: no-repeat;
    background-position: center;
    text-indent: -9999px;
    overflow: hidden;
}
.slider-button-prev {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='white' class='bi bi-chevron-left' viewBox='0 0 16 16'%3E  %3Cpath fill-rule='evenodd' d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'%3E%3C/path%3E%3C/svg%3E");
}
.slider-button-next {
    grid-column: -1 / -2;
    grid-row: 1 / 2;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='white' class='bi bi-chevron-right' viewBox='0 0 16 16'%3E  %3Cpath fill-rule='evenodd' d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'%3E%3C/path%3E%3C/svg%3E");
}
.slider-button-prev:focus,
.slider-button-next:focus {
    outline: none;
}

/* stronicowanie */
.slider-pagination {
    z-index: 2;
    position: absolute;
    left:0;
    bottom:1rem;
    width:100%;
    display: flex;
    justify-content: center;
}

.slider-pagination-button {
    background: transparent;
    width:2rem;
    height:2rem;
    border:0;
    text-indent:-999px;
    overflow: hidden;
    cursor: pointer;
    position: relative;
}
.slider-pagination-button:before {
    content:'';
    position: absolute;
    left:50%;
    top:50%;
    transform:translate(-50%, -50%);
    background: transparent;
    width:0.9rem;
    height:0.9rem;
    border-radius: 50%;
    transition:0.5s all;
    box-shadow:inset 0 0 0 1px rgba(255,255,255,0.5);
}
.slider-pagination-button.is-active:before {
    background: #fff;
}
.slider-pagination-button:focus {
    outline: none;
}

/* wnętrze slajdów */
.slider-slide-title {
    color:#fff;
    font-family: sans-serif;
    position: relative;
    left:-3rem;
    opacity:0;
    font-size:2.3rem;
    font-weight: bold;
    text-transform: uppercase;
    margin-top:0;
    text-align: center;
    font-family: 'Roboto Condensed', sans-serif;
}
.slider-slide-text {
    color:#fff;
    position: relative;
    left:-3rem;
    opacity:0;
    font-size:1.2rem;
    color:rgba(255,255,255,.9);
    padding-left:4rem;
    padding-right:4rem;
    text-align: center;
    font-family: serif;
    font-style: italic;
    max-width:60%;
}
.slider .slider-slide-title {
    left:-3rem;
    opacity:0;
    transition: 2s left, 2s opacity;
}
.slider .slider-slide-text {
    left:-3rem;
    opacity:0;
    transition: 2s 1s left, 2s 1s opacity;
}
.slider-slide.is-active .slider-slide-title {
    left:0;
    opacity:1;
}
.slider-slide.is-active .slider-slide-text {
    left:0;
    opacity:1;
}

@media (max-width: 600px) {
    .slider {
        grid-template-columns: 3rem 1fr 3rem;
    }
    .slider-slide-title {
        font-size: 1.6rem;
        padding-left: 60px;
        padding-right: 60px;
    }
    .slider-slide-text {
        font-size: 1rem;
    }
}

/* ================================ */
/* demo */
.slider-1 {
    background-image: url(./slide-bg1.jpeg);
    margin-bottom: 30px;
}

.slider-2 {
    background-image: url(./slide-bg2.jpeg);
}