/* Southern Water data story — scoped to .data-article */

.data-article {
    --sw-emphasis: var(--color-accent-vivid);
    --sw-emphasis-deep: var(--color-accent-deep);
    --sw-emphasis-soft: var(--color-accent-light);
    --sw-chart-muted: var(--color-accent-muted);
    --sw-rain: var(--color-accent-deep);
    --sw-chart-bg: var(--color-card-bg);
    --sw-content-width: var(--max-width);
    --sw-nav-offset: 52px;
    font-variant-numeric: tabular-nums;
}

.data-article.case-study-page .case-study-header,
.data-article .article-content {
    max-width: none;
}

.data-article .writing-type {
    color: var(--color-accent);
}

.data-article .section-intro {
    max-width: 62ch;
    margin-bottom: var(--space-xl);
}

/* ─── Story header ─── */
.sw-story-header {
    padding-bottom: var(--space-xl);
}

.sw-story-header .article-title {
    max-width: 16ch;
    line-height: 1.08;
    letter-spacing: -0.02em;
}

.sw-story-header .article-subtitle {
    max-width: 52ch;
    margin-top: var(--space-md);
}

.sw-prelude {
    margin-top: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--color-text-muted);
}

.sw-prelude p {
    margin: 0 0 0.65em;
}

.sw-prelude p:last-child {
    margin-bottom: 0;
}

.sw-prelude strong {
    color: var(--color-text);
    font-weight: 600;
}

.sw-byline {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0;
    margin: var(--space-md) 0 0;
    padding: 0;
    list-style: none;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.sw-byline li + li::before {
    content: '·';
    margin: 0 0.65rem;
    color: var(--color-accent-muted);
}

.sw-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sw-table-heading {
    margin: var(--space-2xl) 0 var(--space-md);
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
}

/* ─── Lead band ─── */
.sw-lead {
    background: var(--color-accent-soft);
    padding: var(--space-2xl) 0;
    margin: 0 calc(50% - 50vw);
    width: 100vw;
    scroll-margin-top: calc(var(--sw-nav-offset) + 3rem);
}

.sw-lead > .container {
    max-width: var(--sw-content-width);
}

.sw-lead-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 320px);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
}

.sw-lead-copy {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

.sw-lead-copy p {
    margin: 0 0 1em;
}

.sw-lead-copy p:last-child {
    margin-bottom: 0;
}

.sw-lead-figure {
    margin: 0;
    padding: var(--space-lg);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    text-align: right;
}

.sw-lead-num {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.25rem, 4.5vw, 3.25rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.03em;
    color: var(--sw-emphasis-deep);
}

.sw-lead-unit {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    line-height: 1.45;
    color: var(--color-text-muted);
}

.sw-lead-equiv {
    display: block;
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--color-text);
}

.sw-dateline {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0 0;
    padding: var(--space-lg) 0 0;
    border-top: 1px solid color-mix(in srgb, var(--color-accent-muted) 65%, transparent);
}

.sw-dateline > div {
    min-width: 0;
}

.sw-dateline dt {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.sw-dateline dd {
    margin: 0;
    font-size: 0.8125rem;
    line-height: 1.45;
    color: var(--color-text-muted);
}

/* ─── Chapter nav ─── */
.sw-chapters {
    position: sticky;
    top: var(--sw-nav-offset);
    z-index: 50;
    margin: 0 calc(50% - 50vw) var(--space-2xl);
    width: 100vw;
    background: color-mix(in srgb, var(--color-bg) 90%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.sw-chapters-inner {
    display: flex;
    gap: 0;
    overflow-x: auto;
    max-width: var(--sw-content-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.sw-chapters-inner::-webkit-scrollbar {
    display: none;
}

.sw-chapters a {
    flex-shrink: 0;
    padding: 0.9rem 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    white-space: nowrap;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.sw-chapters a:hover {
    color: var(--color-accent);
}

.sw-chapters a:focus-visible {
    outline: none;
    box-shadow: inset var(--focus-ring);
}

.sw-chapters a.is-active {
    color: var(--sw-emphasis-deep);
    border-bottom-color: var(--sw-emphasis);
}

/* ─── Chapters ─── */
.data-article .container {
    max-width: var(--sw-content-width);
}

.sw-chapter {
    padding: var(--space-2xl) 0;
    scroll-margin-top: calc(var(--sw-nav-offset) + 3rem);
}

.sw-chapter + .sw-chapter {
    border-top: 1px solid var(--color-border);
}

.sw-chapter--band {
    background: var(--color-accent-soft);
    margin: 0 calc(50% - 50vw);
    width: 100vw;
    padding-left: calc(50vw - 50%);
    padding-right: calc(50vw - 50%);
    border-top: none;
}

.sw-chapter--band + .sw-chapter {
    border-top: none;
}

.sw-chapter-head {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    margin-bottom: var(--space-xl);
    max-width: 72ch;
}

.sw-chapter-head h2 {
    display: block;
    width: 100%;
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 2.5vw, 1.875rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin: 0;
}

.sw-chapter-dek {
    display: block;
    width: 100%;
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--color-text-muted);
}

.sw-chart-wrap {
    background: var(--sw-chart-bg);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: clamp(1rem, 2vw, 1.5rem);
    overflow-x: auto;
    width: 100%;
}

.sw-chart-note {
    font-size: 0.8125rem;
    line-height: 1.55;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
    max-width: 72ch;
}

/* Pull quotes */
.data-article .sw-pullquote {
    margin: 0 calc(50% - 50vw);
    width: 100vw;
    padding: var(--space-2xl) 0;
    background: var(--color-surface-raised);
}

.data-article .sw-pullquote .container {
    max-width: var(--sw-content-width);
}

.data-article .sw-pullquote blockquote {
    margin: 0;
    padding: 0;
    max-width: 48ch;
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2.2vw, 1.5rem);
    font-style: normal;
    font-weight: 400;
    line-height: 1.45;
    color: var(--color-text);
    background: none;
    border: none;
    border-radius: 0;
}

.data-article .sw-pullquote blockquote::before {
    content: '\201C';
    display: block;
    margin-bottom: 0.35rem;
    font-size: 2.5rem;
    line-height: 1;
    color: var(--color-accent-muted);
}

/* Anomaly accordion */
.sw-anomaly-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--color-border);
}

.sw-anomaly-item {
    background: var(--color-card-bg);
}

.sw-anomaly-trigger {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font: inherit;
    color: inherit;
}

.sw-anomaly-trigger:hover {
    background: var(--color-accent-soft);
}

.sw-anomaly-trigger:focus-visible {
    outline: none;
    box-shadow: inset var(--focus-ring);
}

.sw-anomaly-num {
    flex-shrink: 0;
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-accent-muted);
    padding-top: 0.1rem;
}

.sw-anomaly-title {
    flex: 1;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--color-text);
}

.sw-anomaly-icon {
    flex-shrink: 0;
    font-size: 1.25rem;
    line-height: 1;
    color: var(--color-text-muted);
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.sw-anomaly-item.is-open .sw-anomaly-icon {
    transform: rotate(45deg);
}

.sw-anomaly-panel {
    display: none;
    padding: 0 1.5rem 1.25rem 3.5rem;
}

.sw-anomaly-item.is-open .sw-anomaly-panel {
    display: block;
}

.sw-anomaly-body {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

.sw-anomaly-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--sw-emphasis-deep);
}

/* Regional table */
.sw-region-table {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    margin-top: var(--space-xl);
}

.sw-region-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.sw-region-table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    background: var(--color-accent-light);
    border-bottom: 1px solid var(--color-border);
}

.sw-region-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-muted);
    vertical-align: top;
    background: var(--color-card-bg);
}

.sw-region-table tr:last-child td {
    border-bottom: none;
}

.sw-region-table tr.is-iow td {
    background: var(--color-accent-soft);
}

.sw-region-table .county-name {
    font-weight: 600;
    color: var(--color-text);
}

.sw-region-table tr.is-iow .county-name {
    color: var(--color-accent);
}

.sw-region-table .bar-bg {
    background: var(--color-border);
    height: 4px;
    border-radius: 2px;
    overflow: hidden;
}

.sw-region-table .bar-fill {
    height: 100%;
    background: var(--sw-emphasis);
    opacity: 0.75;
}

.sw-region-table tr.is-iow .bar-fill {
    background: var(--color-accent);
}

/* Closing + data note */
.sw-close {
    padding: var(--space-2xl) 0;
    scroll-margin-top: calc(var(--sw-nav-offset) + 3rem);
}

.sw-close-prose {
    max-width: 72ch;
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

.sw-close-prose p {
    margin: 0 0 1em;
}

.sw-close-prose p:last-child {
    margin-bottom: 0;
}

.sw-data-note {
    margin-top: var(--space-xl);
    max-width: 72ch;
}

/* D3 tooltip */
.sw-tooltip {
    position: fixed;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    pointer-events: none;
    font-size: 0.8125rem;
    color: var(--color-text);
    opacity: 0;
    transition: opacity 0.15s ease;
    z-index: 200;
    max-width: 240px;
    line-height: 1.5;
    box-shadow: 0 4px 16px color-mix(in srgb, var(--color-text) 8%, transparent);
}

.sw-tooltip.is-visible {
    opacity: 1;
}

.sw-tooltip-title {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.sw-tooltip-val {
    font-size: 1.125rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.sw-tooltip-sub {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.15rem;
}

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

    .sw-lead-figure {
        text-align: left;
    }

    .sw-dateline {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .sw-anomaly-panel {
        padding-left: 1.5rem;
    }

    .sw-chart-wrap {
        padding: 0.75rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sw-anomaly-icon {
        transition: none;
    }
}