:root {
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-border: #e2e5ea;
    --color-text: #1c2230;
    --color-text-muted: #5b6472;
    --color-primary: #10563f;
    --color-primary-dark: #0b3f2e;
    --color-accent: #1a7a56;
    --color-up: #147a4b;
    --color-down: #b3261e;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(20, 25, 35, 0.08), 0 1px 2px rgba(20, 25, 35, 0.05);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.55;
}

.wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
    background: var(--color-primary-dark);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
}
.brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.02em;
}
.brand-accent { color: #7fd8ae; }
.brand:hover { text-decoration: none; opacity: 0.9; }
.brand .tagline {
    font-size: 0.9rem;
    font-weight: 700;
    color: #dfeee6;
    letter-spacing: normal;
    opacity: 0.85;
}
.site-nav a {
    color: #dfeee6;
    margin-left: 24px;
    font-weight: 500;
    font-size: 0.95rem;
}
.site-nav a:hover { color: #fff; text-decoration: none; }

.header-top-row { display: flex; align-items: center; gap: 12px; }
.nav-toggle-checkbox { display: none; }
.nav-toggle-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
}
.nav-toggle-btn span {
    display: block;
    height: 2px;
    width: 100%;
    background: #fff;
    border-radius: 2px;
}

/* Layout */
.main-content { padding: 40px 20px 60px; min-height: 60vh; }

.hero { margin-bottom: 40px; }
.hero h1 { font-size: 2rem; margin-bottom: 8px; }
.hero p { color: var(--color-text-muted); font-size: 1.05rem; max-width: 640px; }

/* Error pages (404, 403) */
.error-page {
    text-align: center;
    max-width: 520px;
    margin: 40px auto;
}
.error-page .error-code {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin: 0 0 8px;
    line-height: 1;
}
.error-page h1 { font-size: 1.5rem; margin: 0 0 10px; }
.error-page .error-message { color: var(--color-text-muted); margin: 0 0 28px; font-size: 1rem; }
.error-page .error-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}
.error-btn {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 999px;
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}
.error-btn:hover { background: var(--color-primary-dark); text-decoration: none; }
.error-btn-secondary {
    background: var(--color-surface);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}
.error-btn-secondary:hover { background: var(--color-bg); }

.section-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 16px;
}
.section-heading h2 { font-size: 1.3rem; margin: 0; }
.section-heading a { font-size: 0.9rem; font-weight: 600; }

/* Search */
.search-form {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    max-width: 520px;
}
.search-form input[type="search"] {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    background: var(--color-surface);
    color: var(--color-text);
}
.search-form input[type="search"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(26, 122, 86, 0.15);
}
.search-form button {
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}
.search-form button:hover { background: var(--color-primary-dark); }
.search-clear {
    font-size: 0.85rem;
    white-space: nowrap;
}
.search-status {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin: -8px 0 20px;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
    margin-bottom: 48px;
}
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}
.card h3 { margin: 0 0 6px; font-size: 1.08rem; }
.card h3 a { color: var(--color-text); }
.card h3 a:hover { color: var(--color-primary); text-decoration: none; }
.card p { color: var(--color-text-muted); font-size: 0.92rem; margin: 0 0 12px; flex-grow: 1; }
.card .meta { font-size: 0.8rem; color: var(--color-text-muted); margin-top: auto; }

.badge {
    display: inline-block;
    background: #eaf5ef;
    color: var(--color-primary);
    border-radius: 999px;
    padding: 2px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 6px;
    margin-bottom: 6px;
}
.badge-link {
    background: #eef1fb;
    color: #3b4fbf;
    text-decoration: none;
}
.badge-link:hover {
    background: #dfe4f7;
    text-decoration: none;
}

.empty-state {
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
}

/* Report detail */
.report-header { margin-bottom: 24px; }
.report-header h1 { margin-bottom: 8px; }
.report-meta { color: var(--color-text-muted); font-size: 0.9rem; }
.report-frame-wrap {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.report-frame {
    width: 100%;
    height: 80vh;
    border: 0;
    display: block;
}
.report-actions { margin-top: 12px; font-size: 0.9rem; }

/* Chart detail */
.chart-header { margin-bottom: 20px; }
.chart-group { margin-bottom: 36px; }
.chart-group-title {
    font-size: 1.1rem;
    margin: 0 0 4px;
    color: var(--color-primary-dark);
}
.chart-group-metrics {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0 0 12px;
}
.chart-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 12px;
    overflow: hidden;
}
.chart-container .chart { width: 100%; height: 440px; }
.chart-hint { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 10px; }

.metric-filter {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 14px;
    margin: 0 0 12px;
    padding: 10px 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}
.metric-filter-label {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-text-muted);
}
.metric-filter-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.82rem;
    color: var(--color-text);
    cursor: pointer;
    user-select: none;
}
.metric-filter-item input {
    cursor: pointer;
    accent-color: var(--color-primary);
}
.metric-filter-toggle {
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    border-radius: 999px;
    padding: 2px 10px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    cursor: pointer;
    margin-left: auto;
}
.metric-filter-toggle:first-of-type { margin-left: auto; }
.metric-filter-toggle + .metric-filter-toggle { margin-left: 4px; }
.metric-filter-toggle:hover { border-color: var(--color-accent); color: var(--color-primary); }

/* Metrics glossary */
.glossary-toc {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-bottom: 32px;
    padding: 14px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.85rem;
}
.glossary-section { margin-bottom: 40px; scroll-margin-top: 16px; }
.glossary-section h2 {
    font-size: 1.15rem;
    color: var(--color-primary-dark);
    margin: 0 0 14px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--color-border);
}
.glossary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}
.glossary-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 18px;
}
.glossary-card h3 { margin: 0 0 8px; font-size: 1rem; }
.glossary-definition { margin: 0 0 10px; font-size: 0.9rem; }
.glossary-why { margin: 0; font-size: 0.86rem; color: var(--color-text-muted); }
.glossary-why strong { color: var(--color-text); }

/* Generate-from-Quandl form */
.gen-form {
    max-width: 480px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 40px;
}
.gen-form-field { margin-bottom: 18px; }
.gen-form-field label {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: 6px;
}
.gen-form-field input[type="text"],
.gen-form-field input[type="number"],
.gen-form-field input[type="email"],
.gen-form-field textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: inherit;
}
.gen-form-field textarea { resize: vertical; }
.gen-form-field input[type="text"]:focus,
.gen-form-field input[type="number"]:focus,
.gen-form-field input[type="email"]:focus,
.gen-form-field textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(26, 122, 86, 0.15);
}
.gen-form-field ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 18px; }
.gen-form-field ul label { display: flex; align-items: center; gap: 6px; font-weight: 400; }
.gen-form-help { font-size: 0.8rem; color: var(--color-text-muted); margin: 4px 0 0; }
.gen-form-error { font-size: 0.8rem; color: var(--color-down); margin: 4px 0 0; }
.gen-form-submit {
    border: none;
    border-radius: var(--radius);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 11px 22px;
    cursor: pointer;
}
.gen-form-submit:hover { background: var(--color-primary-dark); }

.publish-form { display: inline-block; margin-left: 8px; }
.publish-btn {
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: #fff;
    border-radius: 999px;
    padding: 3px 14px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
}
.publish-btn:hover { background: var(--color-primary-dark); }

/* Duplicate-chart warning modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(11, 63, 46, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 1000;
}
.modal-box {
    background: #fff;
    border-radius: 12px;
    max-width: 480px;
    width: 100%;
    padding: 28px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}
.modal-box h2 {
    margin: 0 0 12px;
    font-size: 1.2rem;
    color: var(--color-primary-dark);
}
.modal-box p {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    margin: 0 0 12px;
}
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}
.modal-btn {
    display: inline-block;
    border-radius: 8px;
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
}
.modal-btn:hover { text-decoration: none; }
.modal-btn-cancel {
    background: #fdecec;
    color: #b3261e;
}
.modal-btn-cancel:hover { background: #fbdada; }
.modal-btn-confirm {
    background: #1f8a4c;
    color: #fff;
}
.modal-btn-confirm:hover { background: #176b3b; }

/* Legal pages (Terms, Disclaimer) */
.legal-content { max-width: 760px; }
.legal-content h2 {
    font-size: 1.1rem;
    margin: 28px 0 8px;
    color: var(--color-primary-dark);
}
.legal-content h2:first-child { margin-top: 0; }
.legal-content p, .legal-content li { color: var(--color-text-muted); font-size: 0.95rem; }
.legal-content ul { padding-left: 20px; }
.legal-content .updated-note { font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: 24px; }

/* Alerts */
.alert {
    padding: 10px 16px;
    border-radius: var(--radius);
    margin: 16px 0;
    font-size: 0.9rem;
}
.alert-success, .alert-info { background: #eaf5ef; color: var(--color-primary-dark); }
.alert-warning { background: #fff6e5; color: #8a5a00; }
.alert-error { background: #fdecec; color: var(--color-down); }

/* Pagination */
.pagination { margin-top: 24px; font-size: 0.9rem; display: flex; gap: 12px; }

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
    color: var(--color-text-muted);
    font-size: 0.82rem;
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 20px;
}
.footer-inner p { margin: 0; }
.footer-links { display: flex; gap: 16px; }
.footer-links a { color: var(--color-text-muted); }
.footer-links a:hover { color: var(--color-primary); }

@media (max-width: 560px) {
    .header-inner { flex-direction: column; align-items: flex-start; gap: 10px; }
    .header-top-row { width: 100%; justify-content: space-between; }
    .nav-toggle-btn { display: flex; }
    .site-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 2px;
    }
    .nav-toggle-checkbox:checked ~ .site-nav { display: flex; }
    .site-nav a {
        margin-left: 0;
        padding: 10px 0;
        border-top: 1px solid rgba(255,255,255,0.1);
    }
}