/* Shared case-study patterns. The --case-* values below are neutral
   placeholders; each styles/case-studies/<slug>.css (Oliv included) sets
   the project's real values. */

.case-study {
    /* Surfaces */
    --case-bg: var(--paper);
    --case-fg: var(--ink);
    --case-text: var(--ink);
    --case-visual-bg: var(--paper);
    --case-showcase-bg: var(--case-bg);
    --case-image-only-bg: var(--case-bg);

    /* Type */
    --case-summary-size: 1rem;
    --case-summary-size-mobile: 1rem;
    --case-summary-leading: normal;
    --case-details-size: 1rem;
    --case-intro-heading-size: 1.5em;
    --case-intro-heading-size-mobile: 1.5em;
    --case-intro-text-size: 1rem;
    --case-intro-text-size-mobile: 1rem;
    --case-intro-text-leading: normal;
    --case-intro-text-max: none;

    /* Sizes */
    --case-overview-min-height: auto;
    --case-intro-min-height: auto;
    --case-intro-padding: 0;
    --case-intro-padding-mobile: 0;
    --case-visual-min-height-mobile: 0;
    --case-showcase-padding: 0;
    --case-long-padding: 0;
    --case-long-padding-mobile: 0;

    /* Parallax crop: the image overflows its section so it can move */
    --case-visual-top: 0;
    --case-visual-height: 100%;

    /* Next case study */
    --case-next-min-height: auto;
    --case-next-min-height-mobile: auto;
    --case-next-label-color: var(--muted);
    --case-next-label-size: 1rem;
    --case-next-title-size: 1.5em;
    --case-next-title-leading: normal;
    --case-link-border: var(--case-fg);
    --case-link-hover-fg: var(--case-bg);
    --case-link-hover-bg: var(--case-fg);

    color: var(--case-fg);
    background: var(--case-bg);
}

/* Header follows the project theme (text color is inherited from --case-fg). */
.case-study .site-header {
    background: var(--case-bg);
}

.case-study .site-header a:focus-visible {
    outline-color: currentColor;
}

/* Overview / details */

.case-study__overview {
    display: grid;
    min-height: var(--case-overview-min-height);
    align-items: center;
    padding: 54px 20px 58px;
}

.case-study__overview-inner,
.case-study__introduction-inner {
    width: min(100%, 810px);
    margin: 0 auto;
}

.case-study__overview h1 {
    margin: 0 0 14px;
    font-size: clamp(25px, 3vw, 34px);
    font-weight: 600;
    line-height: 1.15;
}

.case-study__summary {
    max-width: 790px;
    margin: 0 0 24px;
    color: var(--case-text);
    font-size: var(--case-summary-size);
    font-weight: 300;
    line-height: var(--case-summary-leading);
}

.case-study__details {
    display: grid;
    gap: 6px;
    max-width: 520px;
    margin: 0;
    font-size: var(--case-details-size);
    line-height: 1.25;
}

.case-study__details div {
    display: grid;
    grid-template-columns: 105px 1fr;
    gap: 12px;
}

.case-study__details dt {
    font-weight: 600;
}

.case-study__details dd {
    margin: 0;
    font-weight: 300;
}

/* Introduction */

.case-study__introduction {
    display: grid;
    min-height: var(--case-intro-min-height);
    align-items: center;
    padding: var(--case-intro-padding);
}

.case-study__introduction h2 {
    margin: 0 0 20px;
    font-size: var(--case-intro-heading-size);
    font-weight: 600;
}

.case-study__introduction p {
    max-width: var(--case-intro-text-max);
    margin: 0;
    color: var(--case-text);
    font-size: var(--case-intro-text-size);
    font-weight: 300;
    line-height: var(--case-intro-text-leading);
}

/* Visual: full-bleed image with scroll parallax (offset set by scripts/main.js) */

.case-study__visual {
    position: relative;
    width: 100%;
    height: min(62vw, 820px);
    min-height: 300px;
    overflow: hidden;
    background: var(--case-visual-bg);
}

.case-study__visual img {
    position: absolute;
    top: var(--case-visual-top);
    left: 0;
    display: block;
    width: 100%;
    height: var(--case-visual-height);
    object-fit: cover;
    transform: translate3d(0, var(--parallax-offset, 0px), 0);
    will-change: transform;
}

.case-study__visual--hero img {
    object-position: center 48%;
}

.case-study__visual--feature img {
    object-position: center 54%;
    transform: translate3d(0, var(--parallax-offset, 0px), 0) scale(1.12);
}

/* Showcase: contained, centered image */

.case-study__showcase {
    display: grid;
    min-height: 440px;
    place-items: center;
    padding: var(--case-showcase-padding);
    background: var(--case-showcase-bg);
}

.case-study__showcase img {
    display: block;
    width: min(100%, 1180px);
    height: auto;
}

/* Image-only: edge-to-edge image at its natural ratio */

.case-study__image-only {
    background: var(--case-image-only-bg);
}

.case-study__image-only--long {
    padding: var(--case-long-padding);
}

.case-study__image-only img {
    display: block;
    width: 100%;
    height: auto;
}

/* Next case study */

.case-study__next {
    display: flex;
    min-height: var(--case-next-min-height);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 72px 20px;
    text-align: center;
}

.case-study__next p {
    margin: 0 0 12px;
    color: var(--case-next-label-color);
    font-size: var(--case-next-label-size);
    font-weight: 300;
}

.case-study__next h2 {
    margin: 0 0 24px;
    font-size: var(--case-next-title-size);
    font-weight: 600;
    line-height: var(--case-next-title-leading);
}

.case-study__next-link {
    --link-border: var(--case-link-border);
    --link-hover-fg: var(--case-link-hover-fg);
    --link-hover-bg: var(--case-link-hover-bg);
}

/* Responsive */

@media (max-width: 700px) {
    .case-study__overview {
        min-height: 0;
        padding: 48px 20px 52px;
    }

    .case-study__summary {
        font-size: var(--case-summary-size-mobile);
    }

    .case-study__details {
        font-size: 14px;
    }

    .case-study__details div {
        grid-template-columns: 82px 1fr;
        gap: 8px;
    }

    .case-study__introduction {
        min-height: 0;
        padding: var(--case-intro-padding-mobile);
    }

    .case-study__introduction h2 {
        font-size: var(--case-intro-heading-size-mobile);
    }

    .case-study__introduction p {
        font-size: var(--case-intro-text-size-mobile);
    }

    .case-study__visual {
        height: 62vw;
        min-height: var(--case-visual-min-height-mobile);
        max-height: 72svh;
    }

    .case-study__showcase {
        min-height: 0;
        padding: 38px 18px;
    }

    .case-study__image-only--long {
        padding: var(--case-long-padding-mobile);
    }

    .case-study__next {
        min-height: var(--case-next-min-height-mobile);
    }
}