/* ETF BFF — Shared Site CSS (nav + footer) */

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #10b981;
    --accent: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border: #e5e7eb;
}

/* ── Reset (shared baseline) ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: clip; /* clip (not hidden) preserves position:sticky on descendants */
}
html { scroll-behavior: smooth; }

/* ════════════════════════════════════════════
   HEADER / NAV
════════════════════════════════════════════ */
header {
    background: var(--bg-white);
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 200;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    height: 64px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    flex-shrink: 0;
}

.logo-emoji { font-size: 1.8rem; display: inline-flex; align-items: center; line-height: 1; }
.logo-emoji svg { width: 34px; height: 34px; display: block; }
.logo-bff {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 0;
    list-style: none;
    align-items: stretch;
    margin: 0 0 0 auto;
    padding: 0;
}

.nav-links > li {
    position: relative;
    display: flex;
    align-items: stretch;
}

.nav-links > li > a,
.nav-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    text-decoration: none;
    white-space: nowrap;
    transition: color 0.2s;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    position: relative;
}

.nav-links > li > a.active { color: var(--primary); }

.nav-links > li > a.active::after,
.nav-links > li:hover > a::after,
.nav-links > li:hover > .nav-trigger::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--primary);
    border-radius: 2px 2px 0 0;
}

.nav-links > li > a:hover,
.nav-trigger:hover,
.nav-links > li:focus-within > .nav-trigger { color: var(--primary); }

.nav-arrow {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    transition: transform 0.22s ease;
    color: var(--text-light);
}

.nav-links > li:hover .nav-arrow,
.nav-links > li:focus-within .nav-arrow {
    transform: rotate(180deg);
    color: var(--primary);
}

.nav-dropdown {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.10), 0 2px 8px rgba(0,0,0,0.06);
    min-width: 240px;
    padding: 0.6rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
    pointer-events: none;
    z-index: 300;
}

.nav-links > li:hover .nav-dropdown,
.nav-links > li:focus-within .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-dark);
    transition: background 0.15s;
}

.dropdown-item:hover { background: #f5f3ff; color: var(--primary); }
.dropdown-item:hover .di-title { color: var(--primary); }

.di-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.di-text { flex: 1; min-width: 0; }

.di-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.2;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.di-desc {
    font-size: 0.8rem;
    color: var(--text-light);
    line-height: 1.4;
    margin-top: 0.15rem;
}

.dropdown-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0.75rem 0.25rem;
    border-top: 1px solid var(--border);
    margin-top: 0.35rem;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary);
    border-radius: 0 0 8px 8px;
    transition: background 0.15s;
}

.dropdown-footer:hover { background: #eef2ff; }

.cta-button {
    display: inline-flex;
    align-items: center;
    background: var(--primary);
    color: white;
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 700;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    align-self: center;
    margin-left: 0.75rem;
    white-space: nowrap;
    touch-action: manipulation;
}

.cta-button:hover {
    background: var(--primary-dark);
}

.cta-button-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.cta-button-secondary:hover {
    background: var(--primary);
    color: white;
}

#bff-cta-btn { background: var(--secondary); }

#bff-cta-btn:hover {
    background: #059669;
}


.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
    align-self: center;
}


@media (max-width: 900px) {
    .nav-links { display: none; }
    .mobile-menu-toggle { display: flex; }
    /* html prefix raises specificity to 0,1,1 — beats any page-level #bff-cta-btn { display:none !important } (0,1,0) */
    html #bff-cta-btn { display: inline-flex !important; padding: 0.5rem 0.85rem !important; font-size: 0.8rem !important; margin-left: 0.5rem !important; }
    nav { overflow: visible; } /* was hidden — caused toggle to clip */
    .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        border-top: 1px solid var(--border);
        box-shadow: 0 12px 32px rgba(0,0,0,0.12);
        z-index: 199;
        padding: 0.25rem 0 0.75rem;
        align-items: stretch;
    }

    .nav-links.mobile-open > li { display: block; }

    .nav-links.mobile-open > li > a,
    .nav-links.mobile-open > li > .nav-trigger {
        display: block;
        padding: 0.85rem 1.5rem;
        font-size: 0.95rem;
        border-bottom: 1px solid var(--border);
        width: 100%;
        text-align: left;
    }

    .nav-links.mobile-open > li:last-child > a { border-bottom: none; }
    .mobile-menu-toggle.is-open { color: var(--primary); }

    .nav-links.mobile-open .nav-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
        box-shadow: none;
        border: none;
        border-top: 1px solid var(--border);
        border-radius: 0;
        padding: 0.3rem 0;
        min-width: 0;
        background: var(--bg-light);
        display: none;
        margin: 0;
    }

    .nav-links.mobile-open > li.mobile-sub-open .nav-dropdown {
        display: block;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.mobile-open .nav-dropdown .dropdown-item {
        padding: 0.85rem 1.5rem 0.85rem 2.75rem;
        border-radius: 0;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .nav-links.mobile-open .nav-dropdown .dropdown-footer {
        padding: 0.75rem 1.5rem 0.75rem 2.75rem;
        border-radius: 0;
        margin-top: 0;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .nav-links.mobile-open .nav-arrow {
        display: block;
        transition: transform 0.22s ease;
    }

    .nav-links.mobile-open > li.mobile-sub-open .nav-arrow {
        transform: rotate(180deg);
        color: var(--primary);
    }

    .nav-links.mobile-open > li > a.nav-trigger { cursor: pointer; }

    .mobile-nav-bff-btn {
        width: calc(100% - 3rem);
        margin: 0.75rem 1.5rem;
        padding: 0.85rem 1.25rem;
        background: var(--secondary);
        color: white;
        font-weight: 700;
        font-size: 0.95rem;
        font-family: inherit;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        touch-action: manipulation;
    }
}

/* ════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */

/* Pre-footer newsletter band */
.footer-newsletter-band {
    background: #312e81;
    padding: 3.5rem 2rem;
}

.fnb-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.fnb-eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.9px;
    color: rgba(255,255,255,0.65);
    margin-bottom: 0.55rem;
}

.fnb-heading {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    line-height: 1.2;
    margin-bottom: 0.6rem;
}

.fnb-sub {
    color: rgba(255,255,255,0.82);
    font-size: 0.97rem;
    line-height: 1.65;
}

.fnb-row {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.fnb-form input[type="email"] {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 2px solid rgba(255,255,255,0.22);
    background: rgba(255,255,255,0.12);
    color: white;
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, background 0.2s;
}

.fnb-form input[type="email"]::placeholder { color: rgba(255,255,255,0.5); }

.fnb-form input[type="email"]:focus {
    border-color: rgba(255,255,255,0.55);
    background: rgba(255,255,255,0.18);
}

.fnb-form button {
    padding: 0.75rem 1.5rem;
    background: white;
    color: #4f46e5;
    font-weight: 800;
    font-size: 0.875rem;
    font-family: inherit;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s, transform 0.15s, box-shadow 0.15s;
}

.fnb-form button:hover {
    background: #eef2ff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.fnb-fine {
    font-size: 0.76rem;
    color: rgba(255,255,255,0.55);
    margin-top: 0.65rem;
}

/* Footer body */
.site-footer { background: #111827; }

.footer-body {
    padding: 2.5rem 2rem 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.07);
}

.footer-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr 0.8fr;
    gap: 2rem;
}

.footer-logo-mark { width: 26px; height: 26px; vertical-align: -6px; margin-right: 6px; }

.footer-logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    display: inline-block;
    margin-bottom: 0.9rem;
    transition: color 0.18s;
}

.footer-logo:hover { color: #a5b4fc; }

.footer-tagline {
    color: rgba(255,255,255,0.58);
    font-size: 0.85rem;
    line-height: 1.65;
    margin-bottom: 1rem;
    max-width: 260px;
}

.footer-social {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}

.social-link svg { width: 15px; height: 15px; }

.social-link:hover {
    background: #4f46e5;
    border-color: #4f46e5;
    color: white;
}

.footer-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: rgba(255,255,255,0.45);
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.09);
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
}

.footer-col-heading {
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.1px;
    color: rgba(255,255,255,0.38);
    margin-bottom: 1.2rem;
}

.footer-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-nav li { margin-bottom: 0.6rem; }

.footer-nav a {
    color: rgba(255,255,255,0.62);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.18s;
}

.footer-nav a:hover { color: white; }

.footer-coming-soon { display: inline-flex; align-items: center; gap: 0.45rem; }

.cs-badge {
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.28);
    padding: 0.12rem 0.45rem;
    border-radius: 999px;
}

.footer-bottom-bar {
    background: #0d1117;
    padding: 1.5rem 2rem;
}

.fbb-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.fbb-disclaimer {
    font-size: 0.71rem;
    color: rgba(255,255,255,0.28);
    line-height: 1.75;
    margin-bottom: 1.2rem;
    padding-bottom: 1.2rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.fbb-disclaimer strong {
    color: rgba(255,255,255,0.42);
    font-weight: 700;
}

.fbb-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.fbb-copy {
    font-size: 0.76rem;
    color: rgba(255,255,255,0.28);
    margin: 0;
}

.fbb-legal-links {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.fbb-legal-links a {
    font-size: 0.76rem;
    color: rgba(255,255,255,0.32);
    text-decoration: none;
    transition: color 0.15s;
}

.fbb-legal-links a:hover { color: rgba(255,255,255,0.7); }
.fbb-legal-links span { color: rgba(255,255,255,0.18); }

/* Footer responsive */
@media (max-width: 1024px) {
    .fnb-inner { grid-template-columns: 1fr; gap: 2rem; }
    .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-tagline { max-width: 100%; }
}

/* ── Guide CFA reviewer byline ─────────────────────────────────────────── */
.guide-byline {
    display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
    font-size: 0.8rem; color: #64748b; margin: -0.25rem 0 1.25rem;
}
.byline-reviewed { font-weight: 700; color: #059669; }
.byline-divider  { color: #cbd5e1; }
.byline-updated  { color: #94a3b8; }

@media (max-width: 640px) {
    .footer-newsletter-band { padding: 2.5rem 1rem; }
    .fnb-heading { font-size: 1.5rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .footer-brand { grid-column: 1 / -1; }
    .fnb-row { flex-direction: column; }
    .fnb-form input[type="email"] { width: 100%; }
    .fnb-form button { width: 100%; padding: 0.85rem; }
}
@media (max-width: 480px) {
    nav { padding: 0 1rem; }
    .footer-body { padding: 2.5rem 1rem 2rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
    .footer-bottom-bar { padding: 1.25rem 1rem; }
    .fbb-meta { flex-direction: column; align-items: flex-start; }
}

/* ── Become a BFF Modal ────────────────────────────────── */
.bff-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s;
}
.bff-overlay.is-open { opacity: 1; visibility: visible; }
.bff-modal {
    background: var(--bg-white);
    border-radius: 24px;
    padding: 2.25rem 2rem 2rem;
    max-width: 440px;
    width: 100%;
    position: relative;
    box-shadow: 0 32px 80px rgba(0,0,0,0.22), 0 4px 16px rgba(0,0,0,0.08);
    text-align: center;
    transform: translateY(20px) scale(0.96);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.bff-overlay.is-open .bff-modal { transform: translateY(0) scale(1); }
.bff-modal-close {
    position: absolute;
    top: 1rem; right: 1rem;
    width: 30px; height: 30px;
    border-radius: 50%;
    border: none;
    background: var(--bg-light);
    color: var(--text-light);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}
.bff-modal-close:hover { background: #e5e7eb; color: var(--text-dark); }
.bff-modal-badge {
    display: inline-block;
    background: #eef2ff;
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}
.bff-modal-emoji { font-size: 3rem; display: block; margin-bottom: 0.6rem; line-height: 1; }
.bff-modal h2 { font-size: 1.85rem; font-weight: 800; color: var(--text-dark); margin-bottom: 0.6rem; line-height: 1.15; }
.bff-gradient-text {
    color: var(--primary);
}
.bff-modal-sub { color: var(--text-light); font-size: 0.925rem; line-height: 1.65; margin-bottom: 1.5rem; }
.bff-perks {
    display: flex; flex-direction: column; gap: 0.55rem;
    margin-bottom: 1.75rem; text-align: left;
    background: var(--bg-light); border-radius: 14px; padding: 1rem 1.1rem;
}
.bff-perk { display: flex; align-items: center; gap: 0.65rem; font-size: 0.875rem; color: var(--text-dark); font-weight: 500; }
.bff-perk-icon { flex-shrink: 0; font-size: 1.05rem; }
.bff-modal-form { display: flex; gap: 0.5rem; margin-bottom: 0.65rem; }
.bff-modal-form input[type="email"] {
    flex: 1; padding: 0.72rem 1rem;
    border: 1.5px solid var(--border); border-radius: 10px;
    font-size: 0.9rem; font-family: inherit; color: var(--text-dark);
    outline: none; min-width: 0;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.bff-modal-form input[type="email"]:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.12); }
.bff-modal-form button[type="submit"] {
    background: var(--primary);
    color: white; border: none;
    padding: 0.72rem 1.2rem; border-radius: 10px;
    font-size: 0.875rem; font-weight: 700;
    cursor: pointer; white-space: nowrap; font-family: inherit;
    transition: background 0.18s;
}
.bff-modal-form button[type="submit"]:hover { background: var(--primary-dark); }
.bff-modal-fine { font-size: 0.74rem; color: var(--text-light); margin-bottom: 0; }
.bff-modal-success { display: none; padding: 1.5rem 0 0.5rem; }
.bff-modal-success.is-visible { display: block; }
#bff-form-wrap.is-hidden { display: none; }
.bff-success-emoji { font-size: 2.75rem; display: block; margin-bottom: 0.75rem; }
.bff-modal-success h3 { font-size: 1.3rem; font-weight: 800; color: var(--text-dark); margin-bottom: 0.5rem; }
.bff-modal-success p { color: var(--text-light); font-size: 0.9rem; line-height: 1.6; }
@media (max-width: 480px) {
    .bff-modal { padding: 1.75rem 1.25rem 1.5rem; border-radius: 20px; }
    .bff-modal h2 { font-size: 1.55rem; }
    .bff-modal-form { flex-direction: column; }
    .bff-modal-form button[type="submit"] { width: 100%; padding: 0.8rem; }
}

/* ── GUIDE GLOSSARY REFERENCE BLOCK ── */
.guide-glossary-ref {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.5rem;
    padding: 0.875rem 1.125rem;
    background: #f5f3ff;
    border: 1px solid #ede9fe;
    border-radius: 10px;
    margin: 1.5rem 0 2rem;
    font-size: 0.8rem;
    line-height: 1.6;
}
.guide-glossary-ref .ggr-label {
    font-weight: 700;
    color: #4338ca;
    white-space: nowrap;
    margin-right: 0.25rem;
}
.guide-glossary-ref a {
    color: #4f46e5;
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid #c7d2fe;
    padding-bottom: 1px;
    transition: color 0.15s, border-color 0.15s;
}
.guide-glossary-ref a:hover { color: #4338ca; border-color: #4338ca; }
.guide-glossary-ref .ggr-dot { color: #c4b5fd; }
.guide-glossary-ref .ggr-all {
    margin-left: auto;
    border-bottom: none;
    font-weight: 700;
    font-size: 0.775rem;
    color: #6d28d9;
    white-space: nowrap;
}
.guide-glossary-ref .ggr-all:hover { color: #4c1d95; }