/* ============================================================
   case-study.css — Shared styles for all case study pages
   Hero · Meta · Sections · Phases · Stats · CTA
   ============================================================ */

/* ================================ */
/* HERO                             */
/* ================================ */

.cs-hero {
    padding: 140px 0 52px;
    background: #000;
    border-top: none;
    border-bottom: none;
    position: relative;
    overflow: hidden;
}

/* Content layer sits above bg image */
.cs-hero .container {
    position: relative;
    z-index: 2;
}

/* Decorative image — anchored bottom-right, GGPoker style */
.cs-hero__bg-img {
    position: absolute;
    bottom: 0;
    right: 0;
    width: clamp(480px, 54vw, 1020px);
    height: auto;
    z-index: 0;
    pointer-events: none;
    user-select: none;
    display: block;
    animation: cs-hero-img-in 0.9s cubic-bezier(0.16,1,0.3,1) 0.25s both;
    -webkit-mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        black 18%,
        black 82%,
        transparent 100%
    );
    mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        black 18%,
        black 82%,
        transparent 100%
    );
}

@keyframes cs-hero-img-in {
    from { opacity: 0; transform: translateX(24px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* Remove dividing line between hero and first section */
.cs-hero + * { border-top: none !important; }

/* Gradient blends image floor into the next section */
.cs-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 28%;
    background: linear-gradient(
        to top,
        #000 0%,
        rgba(0,0,0,0.45) 55%,
        transparent 100%
    );
    z-index: 1;
    pointer-events: none;
}

.cs-hero__back {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    display: inline-block;
    transition: color 0.2s;
}

.cs-hero__back:hover { color: var(--text-secondary); }

.cs-hero__tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.cs-hero__title {
    font-size: var(--fs-hero);
    font-weight: var(--fw-heading);
    letter-spacing: var(--ls-heading);
    line-height: var(--lh-heading);
    margin-bottom: 24px;
}

.cs-hero__title em {
    font-style: normal;
    color: var(--text-primary);
}

.cs-hero__sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 560px;
    line-height: 1.7;
    margin-bottom: 48px;
}

/* Meta row */
.cs-hero__meta {
    display: flex;
    gap: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

.cs-meta__label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.cs-meta__value {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Draft notice badge */
.cs-draft-notice {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    background: var(--bg-card);
    border: 1px dashed var(--border-hover);
    color: var(--text-muted);
    padding: 10px 20px;
    border-radius: 6px;
    margin-bottom: 40px;
}

/* ================================ */
/* HERO VISUAL PLACEHOLDER          */
/* ================================ */

.cs-visual {
    width: 100%;
    background: #000;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
    display: flex;
    justify-content: center;
}

.cs-visual__video {
    width: 100%;
    max-width: var(--content-wide, 1100px);
    height: auto;
    display: block;
}

/* ================================ */
/* HERO 2-COLUMN LAYOUT             */
/* (kept for reference — not active) */
/* ================================ */

/* ================================ */
/* FULL-WIDTH VISUAL BREAK          */
/* (natural aspect ratio, no crop)  */
/* ================================ */

.cs-divider-visual {
    width: 100%;
    line-height: 0;
    background: #000;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

.cs-divider-visual img {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0.85;
}

/* ================================ */
/* SECTION-LEVEL FEATURED VIDEO     */
/* lives in the section after hero  */
/* ================================ */

.cs-section-video {
    width: 100%;
    aspect-ratio: 16 / 9;
    margin: 32px 0 0;
    border-radius: 10px;
    border: 1px solid var(--border);
    overflow: hidden;
    background: #000;
}

.cs-section-video video,
.cs-section-video iframe {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

/* ================================ */
/* CONTENT SECTIONS                 */
/* ================================ */

.cs-section {
    padding-block: 100px;
    border-top: 1px solid var(--border);
}

/* Align container width with the rest of the design system
   (GGPoker, MotionMind use --content-wide = 1100px) */
.cs-hero .container,
.cs-section .container {
    max-width: var(--content-wide);
}

.cs-section:nth-child(even) { background: var(--bg-primary); }

.cs-heading {
    font-size: var(--fs-section-h2);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 20px;
}

.cs-heading em {
    font-style: normal;
    color: var(--text-secondary);
}

.cs-body {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 680px;
    margin-bottom: 24px;
}

/* ================================ */
/* STATS STRIP                      */
/* ================================ */

.cs-stats {
    display: flex;
    gap: 56px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
    margin-top: 48px;
    flex-wrap: wrap;
}

.cs-stat__number {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
}

.cs-stat__label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    line-height: 1.4;
}

/* ================================ */
/* PHASE BLOCKS                     */
/* ================================ */

.cs-phases {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 40px;
}

.cs-phases--2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.cs-phase {
    padding: 24px 28px;
    border-left: 3px solid var(--border);
    background: transparent;
}

.cs-phase:hover {
    border-left-color: var(--border-strong);
}

.cs-phase__num {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    margin-bottom: 8px;
}

.cs-phase__title {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.cs-phase__body {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ================================ */
/* GALLERY GRID                     */
/* ================================ */

.cs-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 40px;
}

.cs-gallery__item {
    aspect-ratio: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    overflow: hidden;
}

.cs-gallery__item--wide {
    grid-column: span 2;
    aspect-ratio: 16/9;
}

.cs-gallery__item--tall {
    grid-row: span 2;
    aspect-ratio: auto;
}

/* Media fill rules — images and videos inside gallery cells */
.cs-gallery__img,
.cs-gallery__video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ================================ */
/* CLIENT QUOTE / TESTIMONIAL       */
/* ================================ */

.cs-quote {
    margin-top: 40px;
    padding: 28px 32px;
    border-left: 3px solid var(--border-strong);
    background: var(--bg-card);
    border-radius: 0 8px 8px 0;
}

.cs-quote__text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.cs-quote__attr {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-style: normal;
    display: block;
}

/* ================================ */
/* NARRATIVE SECTION LAYOUTS        */
/* ================================ */

/* 2-column split: copy + media */
.cs-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
    margin-top: 36px;
}

.cs-split__media img,
.cs-split__media video,
.cs-split__media iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    display: block;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #000;
}

/* Row of 3 UI screenshots */
.cs-screen-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 20px;
}

.cs-screen-row img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Subject breadth grid */
.cs-subject-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 32px;
}

.cs-subject {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--bg-card);
}

.cs-subject--feature {
    grid-column: span 2;
}

.cs-subject img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.cs-subject__label {
    position: absolute;
    bottom: 8px;
    left: 8px;
    font-family: var(--font-mono);
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.9);
    background: rgba(0,0,0,0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    padding: 4px 8px;
    border-radius: 4px;
}

/* ================================ */
/* MORE CASE STUDIES                */
/* ================================ */

.cs-more {
    padding: 80px 0;
    border-top: 1px solid var(--border);
    background: var(--bg-primary);
}

.cs-more__grid {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.cs-more__link {
    flex: 1;
    min-width: 180px;
    padding: 20px 24px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: border-color 0.2s, color 0.2s;
}

.cs-more__link:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

/* ================================ */
/* CS-CTA                            */
/* Moved to components.css           */
/* ================================ */


/* ===================================================================
   EXTENDED CASE STUDY COMPONENTS
   Stats grid, awards block — used on Nerdstudy and PRISM pages
   =================================================================== */

/* Stats grid (Nerdstudy numbers) */
.cs-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 28px;
}

@media (max-width: 768px) {
    .cs-stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .cs-stats-grid { grid-template-columns: 1fr; }
}

.cs-stat__number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.03em;
}

.cs-stat__label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
    line-height: 1.4;
}

/* Awards block (PRISM awards) */
.cs-awards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 48px;
}

@media (max-width: 768px) {
    .cs-awards { grid-template-columns: 1fr; }
}

.cs-award {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 32px;
    border: 1px solid var(--border);
    position: relative;
}

.cs-award::before {
    content: '★';
    position: absolute;
    top: 20px;
    right: 24px;
    color: var(--text-muted);
    font-size: 1rem;
    opacity: 0.5;
}

.cs-award__org {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
}

.cs-award__title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.cs-award__desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================================================
   RESPONSIVE
   =================================================================== */

/* Tablet ≤ 900px */
@media (max-width: 900px) {
    .cs-section__inner {
        grid-template-columns: 1fr;
    }

    .cs-meta-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile ≤ 768px */
@media (max-width: 768px) {
    .cs-hero {
        padding: 100px 0 60px;
    }

    /* cs-hero__title — fluid --fs-hero handles mobile sizing */

    .cs-section {
        padding-block: 60px;
    }

    .cs-heading {
        font-size: clamp(1.6rem, 6vw, 2rem);
    }

    .cs-body {
        max-width: 100%;
    }

    .cs-visual {
        height: 280px;
    }

    .cs-stats {
        flex-direction: column;
        gap: 28px;
        padding: 28px;
    }

    .cs-phases {
        grid-template-columns: 1fr;
    }

    .cs-phase {
        padding: 24px;
    }

    .cs-meta-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .cs-hero__meta {
        gap: 20px;
    }

    .cs-awards {
        grid-template-columns: 1fr;
    }
}

/* Small mobile ≤ 480px */
@media (max-width: 480px) {
    .cs-hero {
        padding: 90px 0 48px;
    }

    .cs-section {
        padding-block: 48px;
    }

    .cs-stats-grid {
        grid-template-columns: 1fr;
    }

    .cs-cta {
        padding: 60px 0;
    }

    .cs-cta h2 {
        font-size: clamp(1.4rem, 7vw, 1.8rem);
        margin-bottom: 24px;
    }
}

/* ================================ */
/* 2-COLUMN SECTION: text + video   */
/* ================================ */
.cs-section-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
}

.cs-section-2col .cs-section-video {
    display: flex;
    align-items: center;
    align-self: center;
    margin-top: 0; /* no top margin when inside a grid cell */
    width: 100%;
}

.cs-section-2col__text {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Stats row below the 2-col grid */
.cs-section-stats-row {
    margin-top: 48px;
}

@media (max-width: 768px) {
    .cs-section-2col {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}