/* =========================================================================
   VEKTRASCALE SOLUTIONS - Case Studies
   ========================================================================= */

.cs-page { padding-bottom: 0; }

/* ---- Breadcrumb ----------------------------------------------------------- */
.cs-breadcrumb {
    padding: calc(var(--nav-h) + 28px) 0 0;
}

.cs-breadcrumb__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-subtle);
}

.cs-breadcrumb__inner a { color: var(--text-muted); }
.cs-breadcrumb__inner a:hover { color: var(--text); }

.cs-breadcrumb__current {
    color: var(--text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 40vw;
}

/* ---- List hero -------------------------------------------------------------- */
.cs-hero {
    padding: calc(var(--nav-h) + 72px) 0 64px;
}

.cs-hero__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.cs-hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 20px;
}

.cs-hero__eyebrow::before {
    content: '';
    width: 20px;
    height: 1px;
    background: var(--accent);
}

.cs-hero__title {
    font-size: clamp(2.1rem, 4.2vw, 3.1rem);
    font-weight: 680;
    letter-spacing: -0.035em;
    line-height: 1.08;
    margin-bottom: 18px;
}

.cs-hero__lead {
    font-size: 17px;
    line-height: 1.65;
    color: var(--text-muted);
    max-width: 640px;
    text-wrap: pretty;
}

/* ---- Grid -------------------------------------------------------------------- */
.cs-grid-section {
    padding: 16px 0 96px;
}

.cs-grid-section__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.cs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.cs-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    overflow: hidden;
    box-shadow: var(--sh-xs);
    transition: border-color var(--t-med) var(--ease-out),
                box-shadow var(--t-med) var(--ease-out),
                transform var(--t-med) var(--ease-out);
}

.cs-card:hover {
    border-color: var(--accent-300);
    box-shadow: var(--sh-md);
    transform: translateY(-3px);
}

[data-theme="dark"] .cs-card:hover { border-color: rgba(94, 151, 255, 0.4); }

.cs-card__media {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-subtle);
}

.cs-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--t-slow) var(--ease-out);
}

.cs-card:hover .cs-card__media img { transform: scale(1.03); }

.cs-card__badge {
    position: absolute;
    top: 12px;
    left: 12px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #fff;
    background: var(--accent-700);
    padding: 4px 10px;
    border-radius: var(--r-full);
}

.cs-card__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 22px;
}

.cs-card__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.cs-card__tag {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    padding: 3px 10px;
    background: var(--accent-faint);
    border: 1px solid var(--accent-soft);
    border-radius: var(--r-full);
}

[data-theme="dark"] .cs-card__tag { border-color: rgba(94, 151, 255, 0.2); }

.cs-card__client {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text-subtle);
}

.cs-card__title {
    font-size: 16.5px;
    font-weight: 630;
    letter-spacing: -0.015em;
    line-height: 1.3;
    margin-bottom: 9px;
    transition: color var(--t-fast) var(--ease-out);
}

.cs-card:hover .cs-card__title { color: var(--accent); }

.cs-card__summary {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cs-card__cta {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: auto;
    font-size: 13.5px;
    font-weight: 550;
    color: var(--accent);
}

.cs-card__cta svg {
    transition: transform var(--t-med) var(--ease-out);
}

.cs-card:hover .cs-card__cta svg { transform: translateX(3px); }

/* ---- Empty state ------------------------------------------------------------------ */
.cs-empty {
    text-align: center;
    padding: 80px 24px;
    border: 1px dashed var(--border-strong);
    border-radius: var(--r-lg);
}

.cs-empty__title {
    font-size: 20px;
    font-weight: 650;
    margin-bottom: 10px;
}

.cs-empty__text {
    font-size: 15px;
    color: var(--text-muted);
    max-width: 440px;
    margin: 0 auto;
}

.cs-empty__text a {
    color: var(--accent);
    font-weight: 550;
}

.cs-empty__text a:hover { color: var(--accent-hover); }

/* ---- Detail page -------------------------------------------------------------------- */
.cs-detail__header {
    padding: 48px 0 40px;
}

.cs-detail__header-inner {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 24px;
}

.cs-detail__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.cs-detail__tag {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    padding: 4px 11px;
    background: var(--accent-faint);
    border: 1px solid var(--accent-soft);
    border-radius: var(--r-full);
}

[data-theme="dark"] .cs-detail__tag { border-color: rgba(94, 151, 255, 0.2); }

.cs-detail__client {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-subtle);
}

.cs-detail__title {
    font-size: clamp(1.9rem, 3.8vw, 2.8rem);
    font-weight: 680;
    letter-spacing: -0.032em;
    line-height: 1.1;
    margin-bottom: 18px;
    text-wrap: balance;
}

.cs-detail__summary {
    font-size: 17px;
    line-height: 1.65;
    color: var(--text-muted);
    text-wrap: pretty;
}

.cs-detail__hero {
    max-width: var(--container);
    margin: 16px auto 0;
    padding: 0 24px;
}

.cs-detail__hero img {
    width: 100%;
    border-radius: var(--r-lg);
    border: 1px solid var(--border);
    box-shadow: var(--sh-lg);
}

/* Metrics band */
.cs-metrics {
    padding: 48px 0;
    margin-top: 48px;
    background: var(--bg-subtle);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.cs-metrics__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 28px;
}

.cs-metric__value {
    font-size: clamp(1.7rem, 3vw, 2.3rem);
    font-weight: 680;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--accent);
    margin-bottom: 8px;
    font-variant-numeric: tabular-nums;
}

.cs-metric__label {
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--text-muted);
}

/* Body / rich text */
.cs-detail__body {
    padding: 64px 0;
}

.cs-detail__body-inner {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 24px;
    font-size: 16.5px;
    line-height: 1.75;
    color: var(--text-muted);
}

.cs-detail__body-inner h2 {
    font-size: 24px;
    font-weight: 650;
    letter-spacing: -0.022em;
    color: var(--text);
    margin: 40px 0 14px;
}

.cs-detail__body-inner h3 {
    font-size: 19px;
    font-weight: 630;
    letter-spacing: -0.015em;
    color: var(--text);
    margin: 32px 0 12px;
}

.cs-detail__body-inner h2:first-child,
.cs-detail__body-inner h3:first-child { margin-top: 0; }

.cs-detail__body-inner p { margin-bottom: 16px; }

.cs-detail__body-inner ul,
.cs-detail__body-inner ol {
    margin: 0 0 16px;
    padding-left: 24px;
}

.cs-detail__body-inner li { margin-bottom: 7px; }

.cs-detail__body-inner a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.cs-detail__body-inner img {
    border-radius: var(--r-md);
    border: 1px solid var(--border);
    margin: 24px 0;
}

.cs-detail__body-inner blockquote {
    margin: 24px 0;
    padding: 4px 0 4px 20px;
    border-left: 3px solid var(--accent);
    color: var(--text);
    font-style: italic;
}

.cs-detail__body-inner strong { color: var(--text); }

/* Related */
.cs-related {
    padding: 72px 0;
    background: var(--bg-subtle);
    border-top: 1px solid var(--border-subtle);
}

.cs-related__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.cs-related__title {
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    font-weight: 650;
    letter-spacing: -0.025em;
    margin-bottom: 36px;
}

/* ---- CTA -------------------------------------------------------------------------------- */
.cs-cta {
    padding: 96px 0;
    background: var(--ink-900);
}

[data-theme="dark"] .cs-cta {
    background: var(--bg-subtle);
    border-top: 1px solid var(--border-subtle);
}

.cs-cta__inner {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 24px;
    text-align: center;
}

.cs-cta__title {
    font-size: clamp(1.8rem, 3.4vw, 2.5rem);
    font-weight: 660;
    letter-spacing: -0.03em;
    color: #fff;
    margin-bottom: 14px;
}

[data-theme="dark"] .cs-cta__title { color: var(--text); }

.cs-cta__text {
    font-size: 16.5px;
    color: rgba(255, 255, 255, 0.68);
    margin-bottom: 30px;
}

[data-theme="dark"] .cs-cta__text { color: var(--text-muted); }

.cs-cta__btn {
    background: #fff;
    color: var(--ink-900);
    box-shadow: none;
}

.cs-cta__btn:hover { background: var(--ink-100); }

[data-theme="dark"] .cs-cta__btn {
    background: var(--accent);
    color: #0a0e17;
}

[data-theme="dark"] .cs-cta__btn:hover { background: var(--accent-hover); }

/* ---- Responsive ---------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .cs-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
    .cs-hero { padding: calc(var(--nav-h) + 48px) 0 44px; }
    .cs-grid-section { padding: 8px 0 64px; }
    .cs-grid { grid-template-columns: 1fr; }
    .cs-detail__body { padding: 48px 0; }
    .cs-cta { padding: 72px 0; }
}