/* =========================================================
   Case Studies Index  —  prefix: csi-
   Load after component-shared.css, before footer.css
   ========================================================= */

/* ---------- Hero (mirrors pm-hero, single centered column) ---------- */
.csi-hero {
    background: var(--white);
    position: relative;
    overflow: hidden;
    margin-top: 4rem;
}

.csi-hero__container {
    max-width: var(--spacing-container);
    margin: 0 auto;
    padding: 8rem 1.5rem 6rem;
}

.csi-hero__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.csi-hero__tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--light-mint);
    border-radius: var(--radius-full);
    padding: 6px 16px;
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    color: var(--secondary-green);
    margin-bottom: 1.5rem;
}

.csi-hero__title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}

.csi-hero__title .highlight {
    color: var(--secondary-green);
}

.csi-hero__subtitle {
    font-size: 1.125rem;
    font-weight: var(--font-weight-light);
    color: var(--text-secondary);
    line-height: 1.65;
    margin: 0 0 2rem;
}

.csi-hero .hero__actions {
    justify-content: center;
}

/* ---------- Trust (logo marquee) ---------- */
.csi-trust {
    background: var(--white);
    padding: 3rem 0 4rem;
}

.csi-trust__inner {
    max-width: var(--spacing-container);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.csi-trust__label {
    margin: 0 0 var(--spacing-md);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

/* ---------- Metrics (cs-metrics, 3 columns, green labels) ---------- */
.csi-metrics .cs-metrics__grid {
    grid-template-columns: repeat(3, 1fr);
}

.csi-metrics .cs-metric__label {
    color: var(--secondary-green);
}

/* ---------- Section header (shared by sections below) ---------- */
.csi-section {
    padding: 5rem var(--spacing-lg);
}

.csi-section__container {
    max-width: var(--spacing-container);
    margin: 0 auto;
}

.csi-section__header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.csi-section__title {
    font-size: 3.5rem;
    line-height: 1.15;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0 0 var(--spacing-md);
}

.csi-section__subtitle {
    font-size: 1.5rem;
    line-height: 1.5;
    font-weight: var(--font-weight-regular);
    color: var(--text-tertiary);
    margin: 0;
}

/* ---------- Video highlights (horizontal scroll) ---------- */
.csi-videos {
    background: var(--white);
}

.csi-videos__controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.csi-videos__arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    background: var(--white);
    border: 1px solid var(--grey-09);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.csi-videos__arrow:hover {
    background: var(--secondary-green);
    border-color: var(--secondary-green);
    color: var(--white);
}

.csi-videos__arrow:focus-visible,
.csi-videos__track:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
}

.csi-videos .csi-section__container {
    container-type: inline-size;
}

.csi-videos__track {
    --csi-video-w: calc(25cqw - 0.75 * var(--spacing-lg));
    position: relative;
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    scrollbar-width: none;
    padding-inline: calc((100cqw - var(--csi-video-w)) / 2);
    padding-block: var(--spacing-sm);
}

.csi-videos__track::-webkit-scrollbar {
    display: none;
}

.csi-video {
    flex: 0 0 var(--csi-video-w);
    scroll-snap-align: center;
    opacity: 0.5;
    transform: scale(0.92);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.csi-video.is-active {
    opacity: 1;
    transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
    .csi-video { transition: none; }
}

/* Reuse testimonial video frame (cs-quote__video-*), fit to carousel card */
.csi-video .cs-quote__video-wrap {
    max-width: none;
    max-height: none;
    height: auto;
    margin: 0;
    box-shadow: none;
    background: var(--white);
}

.csi-video .cs-quote__video-thumb:focus-within {
    outline: 2px solid var(--blue);
    outline-offset: -2px;
}

/* Customer logo as card preview */
.csi-resources .cs-resources__card-thumb {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-bottom: 1px solid var(--grey-03);
}

.csi-resources .csi-resources__logo {
    width: auto;
    height: auto;
    max-width: 60%;
    max-height: 5rem;
    object-fit: contain;
}

/* Whole resource card clickable */
.csi-resources .cs-resources__link::after {
    content: "";
    position: absolute;
    inset: 0;
}

/* ---------- Timeline (cs-workflow--isc from gps-time-tracking.css) ---------- */
.cs-workflow--isc .cs-wf__step {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cs-workflow--isc .cs-wf__step:hover {
    box-shadow: 0 8px 28px rgba(var(--black-rgb), 0.35);
    transform: translateY(-2px);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    /* Timeline: 6 steps as one 2-column grid on tablet (two 3-step rows would leave orphans) */
    .csi-timeline .cs-workflow__container {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    .csi-timeline .cs-section__header { grid-column: 1 / -1; margin-bottom: var(--spacing-lg); }
    .csi-timeline .cs-wf__grid { display: contents; }
    .csi-hero__container { padding: 6rem 1.5rem 4rem; }
    .csi-hero__title { font-size: 2.5rem; }
    .csi-section__title { font-size: 2.5rem; }
    .csi-section__subtitle { font-size: 1.25rem; }
}

@media (max-width: 768px) {
    /* All Customer Stories: keep 2 cards per row on tablet (shared CSS collapses to 1 here) */
    .csi-resources .cs-resources__grid { grid-template-columns: repeat(2, 1fr); }
    .csi-hero { margin-top: 5rem; }
    .csi-hero__container { padding: 4rem 1.5rem 3rem; }
    .csi-hero__title { font-size: 2rem; }
    .csi-hero__subtitle { font-size: 1rem; }
    .csi-trust { padding: 2rem 0 3rem; }
    .csi-trust__inner { padding: 0 var(--spacing-md); }
    .csi-section { padding: var(--spacing-xxl) var(--spacing-md); }
    .csi-section__title { font-size: 2rem; }
    .csi-section__subtitle { font-size: 1.125rem; }
    .csi-metrics .cs-metrics__grid { grid-template-columns: 1fr; }
    .csi-videos__track { --csi-video-w: min(60cqw, 16rem); }
}

@media (max-width: 480px) {
    .csi-timeline .cs-workflow__container { grid-template-columns: 1fr; }
    .csi-resources .cs-resources__grid { grid-template-columns: 1fr; }
    .csi-hero__container { padding: 3rem 1rem 2rem; }
    .csi-hero__title { font-size: 1.75rem; }
    .csi-section__title { font-size: 1.75rem; }
    .csi-section__subtitle { font-size: 1rem; }
}