/* BFS Webinar Landing — tokens and reset */

:root {
    --bfs-blue: #0170B9;
    --bfs-blue-dark: #015a94;
    --bfs-blue-light: #e6f3fa;

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;

    --bg-page: #ffffff;
    --bg-soft: #f7fafd;
    --bg-card: #ffffff;

    --border: #e2e8f0;
    --border-strong: #cbd5e1;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);

    --container: 1120px;
    --space-page: clamp(1.25rem, 3vw, 2rem);

    --font-sans: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--text-secondary);
    background: var(--bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--bfs-blue); text-decoration: none; }
a:hover { color: var(--bfs-blue-dark); text-decoration: underline; }

h1, h2, h3 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin: 0 0 1rem;
}

h1 {
    font-size: clamp(2rem, 4.5vw, 3.125rem);
    font-weight: 700;
    letter-spacing: -0.025em;
}

h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.1875rem; }

p { margin: 0 0 1rem; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding-left: var(--space-page);
    padding-right: var(--space-page);
}

.eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--bfs-blue);
    margin: 0 0 0.75rem;
}

/* Buttons — calm, solid, no animation on the element itself */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover { text-decoration: none; }

.btn-primary {
    background: var(--bfs-blue);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--bfs-blue-dark);
    color: #ffffff;
    box-shadow: var(--shadow-md);
}

.btn-primary:focus-visible {
    outline: 3px solid var(--bfs-blue-light);
    outline-offset: 2px;
}

.btn-sm { padding: 0.625rem 1.125rem; font-size: 0.9375rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1.0625rem; }

/* Header */

.site-header {
    background: var(--bg-page);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: saturate(180%) blur(8px);
    background: rgba(255, 255, 255, 0.92);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.brand-logo { height: 36px; width: auto; }

/* Hero */

.hero {
    background: linear-gradient(180deg, var(--bfs-blue-light) 0%, var(--bg-page) 100%);
    padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(3rem, 6vw, 4.5rem);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}

.hero-content .lead {
    font-size: 1.1875rem;
    color: var(--text-secondary);
    line-height: 1.65;
    max-width: 34em;
}

.hero-actions {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem 1.5rem;
}

.hero-note {
    font-size: 0.9375rem;
    color: var(--text-muted);
}

.event-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.event-card-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 0 0 1rem;
}

.event-date {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.event-year {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem;
    font-weight: 500;
}

.event-meta {
    display: grid;
    gap: 0.75rem;
    margin: 0;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.event-meta > div {
    display: grid;
    grid-template-columns: 5rem 1fr;
    gap: 1rem;
    font-size: 0.9375rem;
}

.event-meta dt {
    color: var(--text-muted);
    font-weight: 500;
}

.event-meta dd {
    margin: 0;
    color: var(--text-primary);
    font-weight: 500;
}

/* Sections */

.section {
    padding: clamp(3.5rem, 8vw, 6rem) 0;
}

.section-alt {
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-header {
    max-width: 42rem;
    margin: 0 auto 3rem;
    text-align: center;
}

.section-header h2 { margin-bottom: 0; }

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

.feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.feature:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature h3 {
    margin-bottom: 0.625rem;
    color: var(--text-primary);
}

.feature p { margin: 0; color: var(--text-secondary); }

/* Hosts */

.hosts { gap: 1.5rem; }

.host-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    align-items: start;
}

.host-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
    background: var(--bg-soft);
}

.host-body h3 { margin-bottom: 0.25rem; }

.host-role {
    font-size: 0.9375rem;
    color: var(--bfs-blue);
    font-weight: 500;
    margin: 0 0 0.75rem;
}

.host-body p:last-child { margin-bottom: 0; color: var(--text-secondary); }

/* FAQ */

.faq {
    max-width: 48rem;
    margin: 0 auto;
    display: grid;
    gap: 0.75rem;
}

.faq details {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0;
    transition: border-color 150ms ease;
}

.faq details[open] { border-color: var(--border-strong); }

.faq summary {
    list-style: none;
    cursor: pointer;
    padding: 1.125rem 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
    content: '+';
    color: var(--bfs-blue);
    font-weight: 400;
    font-size: 1.5rem;
    line-height: 1;
    transition: transform 150ms ease;
}

.faq details[open] summary::after {
    content: '−';
}

.faq details p {
    padding: 0 1.5rem 1.25rem;
    margin: 0;
    color: var(--text-secondary);
}

/* Final CTA */

.cta-section {
    background: linear-gradient(135deg, var(--bfs-blue) 0%, var(--bfs-blue-dark) 100%);
    color: #ffffff;
}

.cta-inner {
    text-align: center;
    max-width: 36rem;
}

.cta-section h2 { color: #ffffff; }
.cta-section p { color: rgba(255, 255, 255, 0.88); margin-bottom: 2rem; }

.cta-section .btn-primary {
    background: #ffffff;
    color: var(--bfs-blue-dark);
}

.cta-section .btn-primary:hover {
    background: #f1f5f9;
    color: var(--bfs-blue-dark);
}

.cta-note {
    font-size: 0.9375rem;
    margin-top: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-note a {
    color: #ffffff;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* Footer */

.site-footer {
    margin-top: auto;
    background: #0f172a;
    color: #cbd5e1;
    padding: 2.5rem 0;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
}

.footer-logo { height: 32px; width: auto; opacity: 0.95; }

.site-footer p { margin: 0; font-size: 0.875rem; color: #94a3b8; }

/* Responsive */

@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
    .host-card {
        grid-template-columns: 1fr;
        text-align: center;
        justify-items: center;
    }

    .event-card { padding: 1.5rem; }
    .event-date { font-size: 1.75rem; }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-actions .btn { width: 100%; }
    .hero-note { text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}