/* ============================================
   Vortex of a Digital Kind — Holding Page Styles
   ============================================ */

/* --- Hero Fold (hero + transition strip = full viewport minus sticky header) --- */
.hero-fold {
    display: flex;
    flex-direction: column;
    height: calc(100svh - 60px);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    padding: var(--space-4xl) 0;
    text-align: center;
    overflow: hidden;
    flex: 1;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        ellipse at 30% 50%,
        rgba(99, 102, 241, 0.08) 0%,
        transparent 50%
    ),
    radial-gradient(
        ellipse at 70% 50%,
        rgba(167, 139, 250, 0.06) 0%,
        transparent 50%
    );
    animation: heroShift 20s ease-in-out infinite alternate;
    z-index: 0;
}

@keyframes heroShift {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-5%, 5%) rotate(3deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 750px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: var(--color-primary-glow);
    color: var(--color-primary-hover);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    border: 1px solid rgba(99, 102, 241, 0.3);
    margin-bottom: var(--space-lg);
    animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.hero h1 {
    font-size: var(--text-5xl);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.hero-description {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    max-width: 560px;
    margin: 0 auto var(--space-2xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}


/* --- Transition Strip --- */
.transition-strip {
    flex-shrink: 0;
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-xl) 0;
    text-align: center;
}

.transition-strip p {
    margin: 0;
    font-size: var(--text-base);
    color: var(--color-text-secondary);
}

.btn-inline {
    display: inline;
    padding: var(--space-xs) var(--space-md);
    vertical-align: baseline;
    margin-left: var(--space-xs);
    width: auto;
    font-size: inherit;
    white-space: nowrap;
}


/* --- Topics Grid --- */
.topics {
    padding: var(--space-4xl) 0;
}

.topics h2 {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
    max-width: 900px;
    margin: 0 auto;
}

.topic-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    transition: all var(--transition-base);
    overflow: hidden;
}

.topic-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(99, 102, 241, 0.05) 0%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity var(--transition-base);
}

.topic-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.topic-card:hover::before {
    opacity: 1;
}

.topic-name {
    position: relative;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
}


/* --- Newsletter Section --- */
.newsletter-section {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.newsletter-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--color-primary),
        transparent
    );
}

.newsletter-section h2 {
    margin-top: 0;
    font-size: var(--text-2xl);
}

.newsletter-section > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.newsletter-form-fallback {
    max-width: 460px;
    margin: 0 auto;
    text-align: left;
}


/* --- Social Section --- */
.social-section {
    padding: var(--space-3xl) 0;
    text-align: center;
}

.social-section h2 {
    margin-bottom: var(--space-xl);
}

.social-section .social-links {
    justify-content: center;
}


/* --- Roadmap --- */
.roadmap {
    margin: var(--space-2xl) 0;
    padding-left: var(--space-xl);
    border-left: 2px solid var(--color-border);
}

.roadmap-item {
    position: relative;
    padding: 0 0 var(--space-2xl) var(--space-xl);
}

.roadmap-item:last-child {
    padding-bottom: 0;
}

.roadmap-marker {
    position: absolute;
    left: calc(-1 * var(--space-xl) - 7px);
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: var(--color-border);
    border: 2px solid var(--color-bg);
}

.roadmap-marker.current {
    background: var(--color-primary);
    box-shadow: 0 0 8px var(--color-primary-glow);
}

.roadmap-content h3 {
    margin-top: 0;
    margin-bottom: var(--space-xs);
    font-size: var(--text-lg);
}

.roadmap-content p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}


/* --- CTA Block --- */
.cta-block {
    margin-top: var(--space-3xl);
    padding: var(--space-2xl);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    text-align: center;
}

.cta-block h2 {
    margin-top: 0;
    border-top: none;
    padding-top: 0;
}

.cta-block p {
    color: var(--color-text-secondary);
}


/* --- Glassmorphism utility (for future use) --- */
.glass {
    background: rgba(18, 18, 26, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.05);
}


/* --- Responsive: Tablet --- */
@media (max-width: 768px) {
    .hero {
        padding: var(--space-2xl) 0;
    }

    .hero h1 {
        font-size: var(--text-3xl);
    }

    .hero-description {
        font-size: var(--text-base);
    }

    .newsletter-section {
        padding: var(--space-xl);
    }

}

/* --- Responsive: Small phone --- */
@media (max-width: 480px) {
    .hero {
        padding: var(--space-xl) 0;
    }

    .hero h1 {
        font-size: var(--text-2xl);
    }

    .hero-tagline {
        font-size: var(--text-base);
    }

    .hero-description {
        font-size: var(--text-sm);
    }

    .hero-badge {
        font-size: 0.625rem;
    }

    .newsletter-section {
        padding: var(--space-md);
        border-radius: var(--radius-md);
    }


    .topic-card {
        padding: var(--space-md);
    }
}