/**
 * Research Center (/research) — wide About-parity shell + tech analytics UI.
 */
.seo-flight-shell:has(.research-hub),
.seo-flight-shell:has(.research-page) {
    max-width: min(1400px, calc(100vw - 1.5rem));
}

.research-hub,
.research-page {
    --rc-accent: #00c2a8;
    --rc-accent-strong: #008f82;
    --rc-accent-soft: rgba(0, 194, 168, 0.12);
    --rc-chart-from: #008f82;
    --rc-chart-to: #00c2a8;
    --rc-grid: rgba(60, 60, 67, 0.08);
    --rc-text: var(--color-text);
    --rc-muted: var(--color-text-muted);
    --rc-fill: var(--color-surface-muted);
    --rc-surface: var(--color-surface);
    --rc-line: var(--color-border-subtle);
    --rc-radius: 20px;
    -webkit-font-smoothing: antialiased;
}

.research-hub {
    --rc-accent: #11877F;
    --rc-accent-strong: #083E40;
    --rc-accent-soft: rgba(17, 135, 127, 0.1);
    --rc-chart-from: #083E40;
    --rc-chart-to: #11877F;
}

:root[data-theme="dark"] .research-hub,
:root[data-theme="dark"] .research-page {
    --rc-accent: #49C8BF;
    --rc-accent-strong: #72DCD4;
    --rc-accent-soft: rgba(73, 200, 191, 0.16);
    --rc-chart-from: #72DCD4;
    --rc-chart-to: #49C8BF;
}

:root[data-theme="dark"] .research-hub,
:root[data-theme="dark"] .research-page {
    --rc-accent-soft: rgba(0, 194, 168, 0.18);
    --rc-grid: rgba(255, 255, 255, 0.06);
}

/* Open Apple-style KPI strip — no boxed table */
.research-hub .ep-metrics,
.research-page .ep-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    width: 100%;
    max-width: 44rem;
    margin: 1.75rem 0 0;
    padding: 1.35rem 0;
    background: transparent;
    border: none;
    border-radius: 0;
    border-top: 0.5px solid var(--rc-line);
    border-bottom: 0.5px solid var(--rc-line);
}

.research-hub .ep-metrics__divider,
.research-page .ep-metrics__divider {
    display: none;
}

.research-hub .ep-metrics__item,
.research-page .ep-metrics__item {
    gap: 0.35rem;
    padding: 0 1rem 0 0;
}

.research-hub .ep-metrics__item:last-child,
.research-page .ep-metrics__item:last-child {
    padding-right: 0;
}

.research-hub .ep-metrics__label,
.research-page .ep-metrics__label {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: none;
    color: var(--rc-muted);
}

.research-hub .ep-metrics__value,
.research-page .ep-metrics__value {
    font-size: clamp(1.35rem, 2.4vw, 1.75rem);
    font-weight: 600;
    letter-spacing: -0.045em;
    line-height: 1.1;
    color: var(--rc-text);
}

.rc-hero {
    margin: 0 0 2.25rem;
}

.rc-hero--compact {
    margin-bottom: 1.5rem;
}

.rc-eyebrow {
    margin: 0 0 0.55rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--rc-muted);
}

.rc-title {
    margin: 0 0 0.85rem;
    max-width: 14ch;
    font-size: clamp(2.15rem, 5vw, 3.25rem);
    font-weight: 700;
    letter-spacing: -0.045em;
    line-height: 1.08;
    color: var(--rc-text);
}

.rc-hero--compact .rc-title {
    max-width: 28ch;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.rc-lede {
    margin: 0;
    max-width: 38rem;
    font-size: 1.125rem;
    line-height: 1.55;
    letter-spacing: -0.02em;
    font-weight: 400;
    color: var(--rc-muted);
}

.rc-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: 1.35rem;
}

.rc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    padding: 0.7rem 1.2rem;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.015em;
    text-decoration: none;
    transition:
        background 0.18s ease,
        color 0.18s ease,
        transform 0.18s ease;
}

.rc-btn--primary {
    background: var(--rc-accent);
    color: #fff;
    border: none;
}

.rc-btn--primary:hover {
    background: var(--rc-accent-strong);
}

.rc-btn--ghost {
    background: var(--rc-fill);
    color: var(--rc-text);
    border: none;
}

.rc-btn--ghost:hover {
    background: color-mix(in srgb, var(--rc-fill) 70%, var(--rc-accent-soft));
    color: var(--rc-accent-strong);
}

.rc-explain {
    margin: 0 0 1.75rem;
    padding: 1.25rem 1.35rem;
    border-radius: var(--rc-radius);
    background:
        linear-gradient(
            135deg,
            color-mix(in srgb, var(--rc-accent-soft) 80%, transparent),
            var(--rc-fill)
        );
    border: 0.5px solid var(--rc-line);
}

.rc-explain--tight {
    padding: 0.95rem 1.15rem;
}

.rc-explain--tight p {
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.55;
    color: var(--rc-text);
}

.rc-explain__title {
    margin: 0 0 0.9rem;
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.rc-explain__grid {
    display: grid;
    gap: 0.9rem 1.25rem;
}

@media (min-width: 860px) {
    .rc-explain__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.rc-explain__grid h3 {
    margin: 0 0 0.35rem;
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.015em;
}

.rc-explain__grid p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--rc-muted);
}

.rc-explain__grid code {
    font-size: 0.8em;
}

.rc-section {
    margin: 0 0 1.5rem;
}

.rc-section__head {
    margin: 0 0 0.95rem;
    max-width: 52rem;
}

.rc-section__title,
.rc-panel__title {
    margin: 0 0 0.35rem;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.rc-section__lede,
.rc-panel__lede {
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--rc-muted);
}

.rc-month-grid {
    display: grid;
    gap: 0.85rem;
    grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
}

.rc-month-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-height: 9.5rem;
    padding: 1.05rem 1.1rem 1rem;
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    background:
        radial-gradient(120% 90% at 100% 0%, var(--rc-accent-soft), transparent 55%),
        var(--rc-fill);
    border: 0.5px solid var(--rc-line);
    transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.rc-month-card:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--rc-accent) 45%, var(--rc-line));
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.06);
}

.rc-month-card--latest {
    border-color: color-mix(in srgb, var(--rc-accent) 55%, var(--rc-line));
}

.rc-month-card__label {
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.rc-month-card__badge {
    position: absolute;
    top: 0.85rem;
    right: 0.85rem;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--rc-accent-strong);
    background: var(--rc-accent-soft);
}

.rc-month-card__value {
    margin-top: 0.55rem;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
}

.rc-month-card__meta {
    font-size: 0.8125rem;
    color: var(--rc-muted);
}

.rc-month-card__cta {
    margin-top: auto;
    padding-top: 0.75rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--rc-accent-strong);
}

.rc-panel {
    margin: 0 0 1.15rem;
    padding: 1.1rem 1.15rem 1.2rem;
    border-radius: var(--rc-radius);
    background: var(--rc-fill);
    border: 0.5px solid var(--rc-line);
}

.rc-chart-grid {
    display: grid;
    gap: 1rem;
    margin-bottom: 0.25rem;
}

@media (min-width: 960px) {
    .rc-chart-grid {
        grid-template-columns: 1.45fr 1fr;
        align-items: stretch;
    }
}

.rc-empty {
    margin: 0;
    font-size: 0.9375rem;
    color: var(--rc-muted);
}

.rc-fineprint {
    margin: 0.85rem 0 0;
    font-size: 0.8125rem;
    color: var(--rc-muted);
}

.rc-method-grid {
    display: grid;
    gap: 0.85rem;
}

@media (min-width: 900px) {
    .rc-method-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.rc-method-card {
    padding: 1.1rem 1.15rem 1.2rem;
    border-radius: var(--rc-radius);
    background: var(--rc-fill);
    border: 0.5px solid var(--rc-line);
}

.rc-method-card__title {
    margin: 0 0 0.45rem;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.rc-method-card__text {
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.55;
    color: var(--rc-muted);
}

.rc-month-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin: 0.5rem 0 0.25rem;
    padding-top: 0.25rem;
}

.rc-month-nav__link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--rc-accent-strong);
    text-decoration: none;
}

.rc-month-nav__link:hover {
    text-decoration: underline;
}

.rc-month-nav__link--next {
    margin-left: auto;
    text-align: right;
}

.rc-month-nav__spacer {
    flex: 1;
}

.rc-title--wide {
    max-width: 28ch;
}

.rc-hero--report .rc-title {
    max-width: min(34ch, 100%);
    font-size: clamp(1.65rem, 3.8vw, 2.45rem);
}

/* Featured brief styles live in research-pages-report.css */

.rc-takeaways {
    margin: 0 0 1.25rem;
    padding: 1.15rem 1.25rem 1.25rem;
    border-radius: var(--rc-radius);
    background: var(--rc-fill);
    border: 0.5px solid var(--rc-line);
}

.rc-takeaways__list {
    margin: 0.65rem 0 0;
    padding-left: 1.2rem;
    display: grid;
    gap: 0.55rem;
}

.rc-takeaways__list li {
    font-size: 0.96875rem;
    line-height: 1.55;
    color: var(--rc-text);
}

.rc-caption {
    margin: 0.55rem 0 0;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--rc-muted);
}

.rc-route-grid {
    display: grid;
    gap: 0.65rem;
    margin-top: 0.85rem;
}

@media (min-width: 720px) {
    .rc-route-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.rc-route-card {
    padding: 0.9rem 1rem;
    border-radius: 14px;
    background: var(--rc-surface);
    border: 0.5px solid var(--rc-line);
}

.rc-route-card__title {
    margin: 0 0 0.3rem;
    font-size: 0.96875rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.rc-route-card__meta {
    margin: 0;
    font-size: 0.8125rem;
    line-height: 1.45;
    color: var(--rc-muted);
}

.rc-cta {
    margin: 0 0 1.15rem;
    padding: 1.25rem 1.3rem;
    border-radius: var(--rc-radius);
    background: var(--rc-accent-soft);
    border: 0.5px solid color-mix(in srgb, var(--rc-accent) 28%, var(--rc-line));
}

.rc-cta__title {
    margin: 0 0 0.4rem;
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.rc-cta__text {
    margin: 0 0 0.95rem;
    max-width: 48ch;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--rc-muted);
}

.rc-cite {
    margin: 0 0 1rem;
    padding: 1.05rem 1.15rem 1.15rem;
    border-radius: var(--rc-radius);
    background: var(--rc-fill);
    border: 0.5px solid var(--rc-line);
}

.research-chart {
    display: block;
    width: 100%;
    max-width: none;
    height: auto;
    margin: 0.55rem 0 0.15rem;
}

.research-chart__title {
    font-size: 13px;
    font-weight: 600;
    fill: var(--rc-text);
}

.research-chart__tick {
    font-size: 10px;
    fill: var(--rc-muted);
}

.research-chart__axis {
    stroke: var(--rc-line);
    stroke-width: 1;
}

.research-chart__guide {
    stroke: var(--rc-line);
    stroke-width: 1;
    opacity: 0.7;
}

.research-chart__bar {
    transition: opacity 0.12s ease;
}

.research-chart:hover .research-chart__bar {
    opacity: 0.72;
}

.research-chart:hover .research-chart__bar:hover {
    opacity: 1;
}

@media (max-width: 639px) {
    .rc-hero {
        padding: 0 1rem;
        margin-bottom: 1.25rem;
    }

    .rc-title {
        max-width: none;
        font-size: clamp(1.75rem, 8vw, 2.25rem);
    }

    .rc-lede {
        font-size: 1.05rem;
    }

    .research-hub .ep-metrics,
    .research-page .ep-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1.1rem 0.75rem;
        max-width: none;
        margin-left: 1rem;
        margin-right: 1rem;
        padding: 1.15rem 0;
    }

    .research-hub .ep-metrics__item,
    .research-page .ep-metrics__item {
        padding: 0;
    }

    .rc-actions {
        width: auto;
        margin-left: 1rem;
        margin-right: 1rem;
        flex-direction: column;
    }

    .rc-btn {
        width: 100%;
    }

    .rc-explain,
    .rc-section,
    .rc-panel,
    .rc-method-grid,
    .rc-month-nav,
    .rc-chart-grid,
    .rc-featured,
    .rc-takeaways,
    .rc-cta,
    .rc-cite {
        margin-left: 0;
        margin-right: 0;
    }

    .rc-explain,
    .rc-panel,
    .rc-method-card,
    .rc-featured,
    .rc-takeaways,
    .rc-cta,
    .rc-cite {
        border-radius: 0;
        border-left: none;
        border-right: none;
        box-shadow: none;
    }

    .rc-month-grid {
        padding: 0 1rem;
        grid-template-columns: 1fr;
    }

    .rc-section__head {
        padding: 0 1rem;
    }

    .seo-flight-shell:has(.research-hub),
    .seo-flight-shell:has(.research-page) {
        max-width: none;
        padding-inline: 0;
    }

    .research-chart {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}