/*
===============================================================================
 FILE: /css/useful.css
 VERSION: 1.1
 PROJECT: ОКНА ORIGINAL — визуальные карточки раздела «Полезное»
 DATE: 2026-09-01

 CHANGES:
 - спокойные технические фоновые скетчи;
 - линейные иконки слева;
 - умеренный hover;
 - только существующие разделы: Техническая документация, Статьи, Новости, FAQ.
===============================================================================
*/
.useful-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 1.6rem;
}

.useful-card {
    --useful-bg: none;
    position: relative;
    isolation: isolate;
    overflow: hidden;
    min-height: 150px;
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr) 34px;
    gap: 16px;
    align-items: center;
    padding: 24px 24px;
    border: 1px solid #dce5ec;
    border-radius: 20px;
    background:
        linear-gradient(90deg, rgba(255, 255, 255, .98) 0%, rgba(255, 255, 255, .92) 48%, rgba(246, 250, 253, .72) 100%);
    color: inherit;
    text-decoration: none;
    box-shadow: 0 8px 28px rgba(22, 49, 78, .045);
    transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease, background-color .22s ease;
}

.useful-card::before {
    content: "";
    position: absolute;
    z-index: -2;
    inset: 0 0 0 42%;
    background-image: var(--useful-bg);
    background-repeat: no-repeat;
    background-position: right center;
    background-size: cover;
    opacity: .94;
    transition: transform .28s ease, opacity .28s ease;
}

.useful-card::after {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 0;
    background: linear-gradient(90deg, rgba(255, 255, 255, .99) 0%, rgba(255, 255, 255, .96) 39%, rgba(255, 255, 255, .58) 57%, rgba(255, 255, 255, .12) 100%);
    pointer-events: none;
}

.useful-card:hover {
    transform: translateY(-3px);
    border-color: #a9c4d9;
    box-shadow: 0 16px 36px rgba(22, 49, 78, .11);
}

.useful-card:hover::before {
    transform: scale(1.035);
    opacity: 1;
}

.useful-card-icon {
    display: grid;
    place-items: center;
    width: 88px;
    height: 88px;
    /*border: 1px solid #cbdbe7;*/
    /*border-radius: 17px;*/
    /*background: #fff;*/
    overflow: hidden;
    box-shadow: 0 5px 16px rgba(16, 67, 108, .07);
}

.useful-card-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
    display: block;
}

.useful-card-copy {
    position: relative;
    z-index: 1
}

.useful-card h3 {
    margin: 0 0 7px;
    color: #0b315c;
    font-size: 1.4rem;
    line-height: 1.25;
}

.useful-card p {
    max-width: 440px;
    margin: 0;
    color: #607185;
    font-size: 1rem;
    line-height: 1.5;
}

.useful-card-arrow {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border: 1px solid rgba(11, 75, 130, .16);
    border-radius: 50%;
    background: rgba(255, 255, 255, .66);
    color: #0b4b82;
    font-size: 18px;
    transition: transform .22s ease, background .22s ease, border-color .22s ease;
}

.useful-card:hover .useful-card-arrow {
    transform: translateX(3px);
    background: #eef6fb;
    border-color: #9ec0da;
}

.useful-card--technical {
    --useful-bg: url('/images/useful/technical-bg.webp')
}

.useful-card--articles {
    --useful-bg: url('/images/useful/articles-bg.webp')
}

.useful-card--news {
    --useful-bg: url('/images/useful/news-bg.webp')
}

.useful-card--faq {
    --useful-bg: url('/images/useful/faq-bg.webp')
}

@media(max-width:820px) {
    .useful-grid {
        grid-template-columns: 1fr
    }
}

@media(max-width:560px) {
    .useful-card {
        min-height: 132px;
        grid-template-columns: 52px minmax(0, 1fr) 28px;
        gap: 12px;
        padding: 18px;
    }

    .useful-card::before {
        inset: 0 0 0 52%;
        opacity: .58
    }

    .useful-card-icon {
        width: 48px;
        height: 48px;
        border-radius: 14px
    }

    .useful-card-icon img {
        width: 100%;
        height: 100%
    }

    .useful-card p {
        font-size: .82rem
    }
}