/* Case Study — Blog-style article page */

/* Back link */
.cs-back {
    display: inline-flex;
    align-items: center;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-500);
    margin-bottom: var(--space-8);
    transition: color var(--transition-fast);
}
.cs-back:hover {
    color: var(--color-gray-900);
}

/* Hero */
.cs-hero {
    padding: var(--space-16) 0 var(--space-12);
    border-bottom: 1px solid var(--color-gray-100);
}

.cs-hero__inner {
    max-width: 720px;
    margin: 0 auto;
}

.cs-label {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-blue-600);
    margin-bottom: var(--space-4);
}

.cs-hero__title {
    font-size: var(--text-4xl);
    font-weight: 700;
    line-height: var(--leading-tight);
    color: var(--color-gray-900);
    letter-spacing: -0.025em;
    margin-bottom: var(--space-6);
}

.cs-hero__subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
    line-height: var(--leading-relaxed);
    max-width: 640px;
}

.cs-hero__meta {
    margin-top: var(--space-8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-6);
}

.cs-hero__partners {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    line-height: 1;
}

img.cs-hero__partner-logo {
    height: 4.5rem;
    width: auto;
    max-width: none;
    object-fit: contain;
}

.cs-hero__partners-x {
    color: var(--color-gray-300);
    font-weight: 400;
}

.cs-hero__client-name {
    display: block;
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-gray-900);
}

.cs-hero__client-detail {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-gray-400);
}

.cs-hero__tags {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.cs-tag {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-gray-600);
    background: var(--color-gray-100);
    border-radius: 9999px;
}

/* Metrics banner */
.cs-metrics-banner {
    padding: var(--space-10) 0;
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-100);
}

.cs-metrics-banner__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.cs-metric-card {
    text-align: center;
    padding: var(--space-6);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-200);
}

.cs-metric-card__value {
    display: block;
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.01em;
    margin-bottom: var(--space-1);
}

.cs-metric-card__label {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    line-height: var(--leading-normal);
}

/* Article body */
.cs-body {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-12) 0 var(--space-20);
}

.cs-section {
    margin-bottom: var(--space-12);
}

.cs-section__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.01em;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--color-blue-600);
    display: inline-block;
}

.cs-body p {
    font-size: var(--text-base);
    color: var(--color-gray-600);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-5);
}

.cs-body h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

.cs-body a {
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cs-list {
    list-style: none;
    padding: 0;
    margin-bottom: var(--space-5);
}

.cs-list li {
    position: relative;
    padding-left: var(--space-6);
    font-size: var(--text-base);
    color: var(--color-gray-600);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-2);
}

.cs-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.65em;
    width: 6px;
    height: 6px;
    background: var(--color-blue-600);
    border-radius: 50%;
}

/* Dashboard mockups */
.cs-figure {
    margin: var(--space-8) calc(-1 * var(--space-6));
    margin-bottom: var(--space-8);
}

.cs-figure__caption {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    text-align: center;
    margin-top: var(--space-3);
    padding: 0 var(--space-6);
    font-style: italic;
}

.cs-dashboard-mock {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.cs-dashboard-mock--compact {
    box-shadow: var(--shadow-md);
}

.cs-mock-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
}

.cs-mock-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.cs-mock-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.cs-mock-dot--green { background: var(--color-green-600); }
.cs-mock-dot--blue { background: var(--color-blue-600); }

.cs-mock-pills {
    display: flex;
    gap: var(--space-1);
}

.cs-mock-pill {
    padding: 2px var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-gray-500);
    background: var(--color-white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-gray-200);
}

.cs-mock-pill--active {
    background: var(--color-blue-600);
    color: var(--color-white);
    border-color: var(--color-blue-600);
}

/* Mock metric cards */
.cs-mock-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-gray-100);
    border-bottom: 1px solid var(--color-gray-100);
}

.cs-mock-metric-card {
    background: var(--color-white);
    padding: var(--space-4) var(--space-5);
    text-align: center;
}

.cs-mock-metric-label {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-gray-400);
    margin-bottom: var(--space-1);
}

.cs-mock-metric-value {
    display: block;
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.cs-mock-metric-change {
    display: block;
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-gray-400);
    margin-top: 2px;
}

.cs-mock-metric-change--up {
    color: var(--color-green-600);
}

/* Mock bar chart */
.cs-mock-chart {
    padding: var(--space-5);
}

.cs-mock-chart-title {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-gray-500);
    margin-bottom: var(--space-4);
}

.cs-mock-bars {
    display: flex;
    align-items: flex-end;
    gap: var(--space-3);
    height: 140px;
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-gray-100);
}

.cs-mock-bar-group {
    flex: 1;
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 100%;
}

.cs-mock-bar {
    flex: 1;
    border-radius: 3px 3px 0 0;
    transition: height 0.6s ease;
}

.cs-mock-bar--revenue {
    background: var(--color-blue-500);
    opacity: 0.85;
}

.cs-mock-bar--labor {
    background: var(--color-gray-300);
}

.cs-mock-legend {
    display: flex;
    gap: var(--space-5);
    margin-top: var(--space-3);
    justify-content: center;
}

.cs-mock-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

.cs-mock-legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 2px;
    display: inline-block;
}

.cs-mock-legend-dot--revenue { background: var(--color-blue-500); }
.cs-mock-legend-dot--labor { background: var(--color-gray-300); }

/* Mock table */
.cs-mock-table {
    padding: 0 var(--space-5) var(--space-4);
}

.cs-mock-table-row {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--space-8);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-gray-100);
    font-size: var(--text-sm);
    color: var(--color-gray-600);
}

.cs-mock-table-row--header {
    font-weight: 600;
    font-size: var(--text-xs);
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--color-gray-200);
}

.cs-mock-table-row--total {
    font-weight: 600;
    color: var(--color-gray-900);
    border-bottom: none;
    border-top: 2px solid var(--color-gray-200);
}

.cs-mock-table-row span:nth-child(2),
.cs-mock-table-row span:nth-child(3) {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* Mock cash flow chart */
.cs-mock-cashflow {
    padding: var(--space-5);
}

.cs-mock-cashflow-area {
    height: 120px;
}

.cs-mock-cashflow-svg {
    width: 100%;
    height: 100%;
}

.cs-mock-cashflow-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--color-gray-400);
    margin-top: var(--space-2);
}

/* Data integrations */
.cs-integrations {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    margin-top: var(--space-6);
    margin-bottom: var(--space-6);
}

.cs-integration {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
    padding: var(--space-5);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
}

.cs-integration__icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-200);
}

.cs-integration strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.cs-integration p {
    font-size: var(--text-sm) !important;
    color: var(--color-gray-500) !important;
    line-height: var(--leading-relaxed);
    margin-bottom: 0 !important;
}

/* Impact grid */
.cs-impact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.cs-impact-item {
    padding: var(--space-6);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
}

.cs-impact-item h3 {
    font-size: var(--text-base) !important;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-top: 0 !important;
    margin-bottom: var(--space-2) !important;
}

.cs-impact-item p {
    font-size: var(--text-sm) !important;
    color: var(--color-gray-500) !important;
    margin-bottom: 0 !important;
}

/* Charts */
.cs-chart-card--single {
    margin: var(--space-8) 0;
}

.cs-chart-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.cs-chart-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
}

.cs-chart-header h3 {
    font-size: var(--text-sm) !important;
    font-weight: 600;
    color: var(--color-gray-700);
    margin: 0 !important;
}

.cs-chart-header p {
    font-size: var(--text-xs) !important;
    color: var(--color-gray-400) !important;
    margin: 2px 0 0 0 !important;
}

.cs-chart-container {
    padding: var(--space-4) var(--space-5);
    height: 220px;
    position: relative;
}

/* CTA */
.cs-cta {
    text-align: center;
    padding: var(--space-12) var(--space-8);
    background: var(--color-gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    margin-top: var(--space-12);
}

.cs-cta h2 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-3);
}

.cs-cta p {
    font-size: var(--text-base);
    color: var(--color-gray-500);
    margin-bottom: var(--space-6);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.cs-cta__actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 768px) {
    .cs-hero {
        padding: var(--space-10) 0 var(--space-8);
    }

    .cs-hero__title {
        font-size: var(--text-2xl);
    }

    .cs-hero__subtitle {
        font-size: var(--text-base);
    }

    .cs-hero__meta {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .cs-figure {
        margin-left: calc(-1 * var(--space-4));
        margin-right: calc(-1 * var(--space-4));
    }

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

    .cs-mock-bars {
        height: 100px;
    }

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

    .cs-body {
        padding: var(--space-8) 0 var(--space-12);
    }

    .cs-section__title {
        font-size: var(--text-xl);
    }
}