/* ================================================================
   Science Agency Spend-Down Tracker
   Editorial design system
   ================================================================ */

/* ── Reset & Base ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-text: #0f1419;
    --color-text-secondary: #32373f;
    --color-text-muted: #6b7280;
    --color-text-faint: #9ca3af;
    --color-bg: #f3f5f6;
    --color-surface: #ffffff;
    --color-surface-alt: #fafaf9;
    --color-border: #d9d6d0;
    --color-border-light: #e5e3e0;
    --color-accent: #1e5a96;
    --color-positive: #2b7a6b;
    --color-negative: #b35a3a;
    --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container-width: 1060px;
    --container-wide: 1160px;
    --radius: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2.5rem;
}

/* ── Header ── */
.site-header {
    padding: 3rem 0 1.5rem;
    background: var(--color-bg);
}

.header-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2.5rem;
}

.site-title {
    font-family: var(--font-serif);
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.site-subtitle {
    font-family: var(--font-sans);
    font-size: 1.0rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 860px;
}

.data-badge {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    color: var(--color-text-faint);
    margin-top: 1rem;
    letter-spacing: 0.01em;
    font-weight: 400;
}

.data-badge::before {
    display: none;
}

/* ── Tab Navigation ── */
.tab-nav {
    backdrop-filter: blur(8px);
    background: rgba(243, 245, 246, 0.95);
    border-bottom: 1px solid var(--color-border);
    margin-top: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.tab-nav .container {
    display: flex;
    gap: 0;
}

.tab-btn {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
    white-space: nowrap;
    letter-spacing: 0.015em;
}

.tab-btn:hover {
    color: var(--color-text-secondary);
    background: rgba(0,0,0,0.02);
}

.tab-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

.tab-btn.active {
    color: var(--color-text);
    font-weight: 600;
    border-bottom-color: var(--color-accent);
}

/* ── Tab Panels ── */
.tab-panel {
    display: none;
    padding: 2.5rem 0 4rem;
}

.tab-panel.active {
    display: block;
}

/* ── Section Headings ── */
.section-heading {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--color-text);
    margin-top: 3rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0;
    border-bottom: none;
}

.section-heading-inline {
    display: flex;
    align-items: baseline;
    gap: 0.15rem;
    flex-wrap: wrap;
    margin-bottom: 0.4rem;
}

.section-heading-inline .section-heading {
    margin-bottom: 0;
}

.select-wrapper.select-inline {
    position: relative;
    width: auto;
    display: inline-block;
}

.select-wrapper.select-inline::after {
    display: none;
}

.select-wrapper.select-inline select {
    width: auto;
    font-family: var(--font-serif);
    font-size: 1.55rem;
    font-weight: 600;
    color: var(--color-accent);
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--color-border-light);
    border-radius: 0;
    padding: 0 1.6rem 0.15rem 0.15rem;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%231e5a96' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.1rem center;
    box-shadow: none;
    transition: border-color var(--transition), color var(--transition);
}

.select-wrapper.select-inline select:hover {
    border-bottom-color: var(--color-accent);
    color: var(--color-text);
}

.select-wrapper.select-inline select:focus {
    outline: none;
    border-bottom-color: var(--color-accent);
    box-shadow: none;
}

.select-wrapper.select-inline select option {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text);
    padding: 0.4rem 0.6rem;
}

.section-subheading {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

/* ── Editorial Text ── */
.editorial-text {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

/* ── Chart Titles (HTML above charts) ── */
.chart-header {
    margin-bottom: 1.5rem;
}

.chart-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.35rem;
    line-height: 1.3;
}

.chart-subtitle {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.55;
}

/* ── Callout Box ── */
.callout {
    background: var(--color-surface-alt);
    border-left: 4px solid var(--color-accent);
    padding: 1.1rem 1.4rem;
    margin: 2.5rem 0;
    font-family: var(--font-sans);
    font-size: 0.86rem;
    line-height: 1.65;
    color: var(--color-text-muted);
    border-radius: 0 4px 4px 0;
}

.callout strong {
    color: var(--color-text-secondary);
    font-weight: 600;
}

/* ── Chart Containers ── */
.chart-card {
    background: var(--color-surface);
    border: 1px solid rgba(217, 214, 208, 0.4);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* wide variant for prominent charts — breaks out of .container */
.chart-wide {
    width: calc(100vw - 2rem);
    max-width: var(--container-wide);
    margin-left: 50%;
    transform: translateX(-50%);
    position: relative;
}

/* ── Agency Grid (small multiples) ── */
.agency-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.agency-grid .chart-card {
    padding: 0.85rem 0.85rem 0.4rem;
}

/* ── Agency Selector ── */
.agency-selector {
    margin-bottom: 1.25rem;
    max-width: 400px;
}

.selector-label {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '';
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid var(--color-text-muted);
    pointer-events: none;
}

.select-wrapper select {
    width: 100%;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.65rem 2.5rem 0.65rem 0.9rem;
    appearance: none;
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.select-wrapper select:hover {
    border-color: #9ca3af;
}

.select-wrapper select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(30, 90, 150, 0.1);
}

/* ── Metric Cards ── */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.1rem;
    margin-bottom: 2.5rem;
}

@media (max-width: 900px) {
    .metrics-row {
        grid-template-columns: repeat(3, 1fr);
    }
}

.metric-card {
    background: var(--color-surface);
    border: 1px solid rgba(217, 214, 208, 0.25);
    border-radius: var(--radius);
    padding: 1.35rem 1.1rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), transform var(--transition);
}

.metric-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.metric-label {
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.metric-value {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.metric-delta {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 500;
    margin-top: 0.35rem;
}

.metric-delta.positive { color: var(--color-positive); }
.metric-delta.negative { color: var(--color-negative); }

.metric-value.metric-neg { color: var(--color-negative); }
.metric-value.metric-pos { color: var(--color-positive); }

/* ── Chart Controls ── */
.chart-controls {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.75rem;
}

/* ── Segmented Control ── */
.segmented-control {
    display: inline-flex;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2px;
    gap: 2px;
}

.seg-btn {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-radius: 6px;
    padding: 0.35rem 0.85rem;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.seg-btn:hover:not(:disabled):not(.active) {
    color: var(--color-text-secondary);
}

.seg-btn.active {
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
}

.seg-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ── Export Toolbar ── */
.export-toolbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.export-toolbar-label {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--color-text-faint);
}

.export-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-export {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.35rem 0.75rem;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-export:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-export:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ── Data Tables ── */
.table-wrapper {
    background: var(--color-surface);
    border: 1px solid rgba(217, 214, 208, 0.3);
    border-radius: var(--radius);
    overflow: auto;
    box-shadow: var(--shadow-md);
    max-height: 520px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    white-space: nowrap;
}

.data-table caption {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--color-text-muted);
    text-align: left;
    padding: 0.85rem 1rem 0.6rem;
    caption-side: top;
    border-bottom: 1px solid var(--color-border-light);
}

.data-table thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

.data-table th {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    background: var(--color-surface-alt);
    padding: 0.65rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table td {
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text);
}

.data-table tbody tr:hover {
    background: var(--color-surface-alt);
}

.data-table td.number {
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-family: var(--font-sans);
}

/* ── Methodology Note ── */
.methodology-note {
    background: var(--color-surface);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius);
    padding: 1.5rem 1.75rem;
    margin-bottom: 2.5rem;
    box-shadow: var(--shadow-sm);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    line-height: 1.75;
    color: var(--color-text-secondary);
}

.methodology-note strong {
    color: var(--color-text);
    font-weight: 600;
}

.methodology-note p {
    margin-top: 0.75rem;
}

.methodology-note p:first-child {
    margin-top: 0;
}

.methodology-note table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    margin-top: 0.75rem;
}

.methodology-note th,
.methodology-note td {
    text-align: left;
    padding: 0.4rem 0.75rem;
    border-bottom: 1px solid var(--color-border-light);
}

.methodology-note th {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ── Glossary ── */
.glossary {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.glossary h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.glossary dl {
    font-size: 0.84rem;
    line-height: 1.6;
}

.glossary dt {
    font-family: var(--font-sans);
    font-weight: 600;
    color: var(--color-text);
    margin-top: 0.75rem;
}

.glossary dt:first-child {
    margin-top: 0;
}

.glossary dd {
    font-family: var(--font-sans);
    color: var(--color-text-muted);
    margin: 0.1rem 0 0 0;
}

/* ── Footer ── */
.site-footer {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--color-text-faint);
    border-top: 1px solid var(--color-border);
    padding: 2rem 0 2.5rem;
    margin-top: 3rem;
    line-height: 1.8;
}

.site-footer .container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.site-footer a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    border-bottom: none;
    transition: color var(--transition);
}

.site-footer a:hover {
    color: var(--color-text);
}

.footer-build {
    margin-top: 0.5rem;
    font-size: 0.72rem;
}

/* ── Source Badge ── */
.source-badge {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--color-text-faint);
    margin-top: 1rem;
    padding: 0.4rem 0;
    letter-spacing: 0.01em;
}

/* ── Focus Visible (global) ── */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ── Responsive ── */
@media (max-width: 1200px) {
    .container,
    .header-inner {
        padding: 0 2rem;
    }
}

@media (max-width: 900px) {
    .agency-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container,
    .header-inner {
        padding: 0 1.5rem;
    }

    .site-header {
        padding: 2rem 0 1.25rem;
    }

    .site-title {
        font-size: 2rem;
    }

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

    .agency-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .tab-nav .container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .tab-nav .container::-webkit-scrollbar {
        display: none;
    }

    .metrics-row {
        grid-template-columns: 1fr;
    }

    .export-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ── Print Stylesheet ── */
@media print {
    .tab-nav, .chart-controls, .export-toolbar, .agency-selector, .segmented-control {
        display: none !important;
    }

    .tab-panel {
        display: block !important;
        padding: 1rem 0;
        break-before: page;
    }

    .chart-card { box-shadow: none; border: 1px solid #ddd; break-inside: avoid; }

    body { background: white; font-size: 11pt; }
}