.presentation-detail {
    padding: 46px 24px 110px;
    background: #ffffff;
}

.presentation-detail__container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
}


/* Back */

.presentation-detail__back {
    display: inline-flex;
    align-items: center;
    gap: 7px;

    margin-bottom: 30px;

    color: #087ec7;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.3;
    text-decoration: none;

    transition: color 0.2s ease;
}

.presentation-detail__back:hover {
    color: #005f9e;
}

.presentation-detail__back svg {
    flex: 0 0 auto;
}


/* Header */

.presentation-detail__header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 50px;

    margin-bottom: 54px;
}

.presentation-detail__info {
    min-width: 0;
}

.presentation-detail__title {
    margin: 0 0 13px;

    color: #082d5c;
    font-size: clamp(34px, 3vw, 46px);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.02em;
}

.presentation-detail__description {
    max-width: 780px;

    color: #64748b;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.55;
}

.presentation-detail__actions {
    padding-bottom: 4px;
}

.presentation-detail__download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 11px;

    min-height: 54px;
    padding: 0 27px;

    border-radius: 9px;

    background: #087ec7;
    color: #ffffff;

    font-size: 16px;
    font-weight: 500;
    line-height: 1;

    text-decoration: none;
    white-space: nowrap;

    box-shadow:
        0 5px 14px rgba(8, 126, 199, 0.14);

    transition:
        background-color 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.presentation-detail__download:hover {
    background: #006fb5;

    box-shadow:
        0 7px 18px rgba(8, 126, 199, 0.22);

    transform: translateY(-1px);
}

.presentation-detail__download:active {
    transform: translateY(0);
}


/* Viewer */

.presentation-viewer {
    width: 100%;
}

.presentation-viewer__stage {
    position: relative;

    display: flex;
    align-items: center;
    justify-content: center;

    width: 100%;
}

.presentation-viewer__slides {
    position: relative;

    width: min(100%, 1040px);

    overflow: hidden;

    border: 1px solid #e1e8ef;
    border-radius: 5px;

    background: #ffffff;

    box-shadow:
        0 2px 8px rgba(15, 23, 42, 0.025);
}

.presentation-viewer__slides {
    position: relative;

    display: grid;

    width: min(100%, 1040px);

    overflow: hidden;

    border: 1px solid #e1e8ef;
    border-radius: 5px;

    background: #ffffff;

    box-shadow:
        0 2px 8px rgba(15, 23, 42, 0.025);
}


.presentation-viewer__slide {
    grid-column: 1;
    grid-row: 1;

    width: 100%;

    visibility: hidden;
    opacity: 0;

    pointer-events: none;
}


.presentation-viewer__slide.is-active {
    visibility: visible;
    opacity: 1;

    pointer-events: auto;
}

.presentation-viewer__image {
    display: block;

    width: 100%;
    height: auto;

    object-fit: contain;

    user-select: none;
}


/* Arrows */

.presentation-viewer__arrow {
    position: absolute;
    top: 50%;

    z-index: 5;

    display: flex;
    align-items: center;
    justify-content: center;

    width: 58px;
    height: 58px;

    padding: 0;

    border: 0;
    border-radius: 50%;

    background: #f1f5f9;
    color: #0b315d;

    cursor: pointer;

    transform: translateY(-50%);

    transition:
        background-color 0.2s ease,
        color 0.2s ease,
        transform 0.2s ease,
        opacity 0.2s ease;
}

.presentation-viewer__arrow--prev {
    left: 0;
}

.presentation-viewer__arrow--next {
    right: 0;
}

.presentation-viewer__arrow:hover:not(:disabled) {
    background: #e4edf5;
    color: #087ec7;
}

.presentation-viewer__arrow:active:not(:disabled) {
    transform:
        translateY(-50%)
        scale(0.96);
}

.presentation-viewer__arrow:disabled {
    opacity: 0.35;
    cursor: default;
}


/* Navigation below slide */

.presentation-viewer__navigation {
    display: flex;
    flex-direction: column;
    align-items: center;

    margin-top: 18px;
}

.presentation-viewer__counter {
    display: flex;
    align-items: center;
    gap: 5px;

    color: #132238;
    font-size: 15px;
    font-weight: 500;
    line-height: 1;
}

.presentation-viewer__counter-divider {
    color: #64748b;
}

.presentation-viewer__dots {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;

    gap: 8px;

    margin-top: 16px;
}

.presentation-viewer__dot {
    width: 9px;
    height: 9px;

    padding: 0;

    border: 0;
    border-radius: 50%;

    background: #dce3eb;

    cursor: pointer;

    transition:
        background-color 0.2s ease,
        transform 0.2s ease;
}

.presentation-viewer__dot:hover {
    background: #b8c6d4;
}

.presentation-viewer__dot.is-active {
    background: #087ec7;
    transform: scale(1.08);
}


/* Empty */

.presentation-viewer-empty {
    max-width: 1040px;
    margin: 0 auto;

    text-align: center;
}

.presentation-viewer-empty__image {
    display: block;

    width: 100%;
    height: auto;

    margin-bottom: 18px;

    border: 1px solid #e1e8ef;
    border-radius: 5px;
}

.presentation-viewer-empty__text {
    margin: 0;

    color: #64748b;
    font-size: 16px;
}


/* Desktop arrows spacing */

@media (min-width: 1201px) {

    .presentation-viewer__slides {
        width: calc(100% - 180px);
        max-width: 1040px;
    }

    .presentation-viewer__arrow--prev {
        left: 10px;
    }

    .presentation-viewer__arrow--next {
        right: 10px;
    }

}


/* Tablet */

@media (max-width: 1200px) {

    .presentation-viewer__stage {
        padding: 0 70px;
    }

    .presentation-viewer__arrow--prev {
        left: 0;
    }

    .presentation-viewer__arrow--next {
        right: 0;
    }

}


/* Mobile */

@media (max-width: 760px) {

    .presentation-detail {
        padding:
            28px
            16px
            80px;
    }

    .presentation-detail__back {
        margin-bottom: 24px;
    }

    .presentation-detail__header {
        display: block;

        margin-bottom: 36px;
    }

    .presentation-detail__title {
        margin-bottom: 12px;

        font-size: 34px;
    }

    .presentation-detail__description {
        font-size: 15px;
        line-height: 1.55;
    }

    .presentation-detail__actions {
        margin-top: 22px;
        padding-bottom: 0;
    }

    .presentation-detail__download {
        width: 100%;

        min-height: 50px;

        padding: 0 20px;

        font-size: 15px;
    }

    .presentation-viewer__stage {
        padding: 0;
    }

    .presentation-viewer__slides {
        width: 100%;
    }

    .presentation-viewer__arrow {
        width: 42px;
        height: 42px;

        background: rgba(
            255,
            255,
            255,
            0.92
        );

        box-shadow:
            0 2px 8px
            rgba(15, 23, 42, 0.14);
    }

    .presentation-viewer__arrow svg {
        width: 22px;
        height: 22px;
    }

    .presentation-viewer__arrow--prev {
        left: 10px;
    }

    .presentation-viewer__arrow--next {
        right: 10px;
    }

    .presentation-viewer__navigation {
        margin-top: 15px;
    }

    .presentation-viewer__dots {
        gap: 7px;
        margin-top: 13px;
    }

    .presentation-viewer__dot {
        width: 8px;
        height: 8px;
    }

}