/* ==========================================================================
   ZETA HOME — Hero, Globe, Featured, About sections
   ========================================================================== */

/* ===== Hero ===== */
.zeta-hero {
    position: relative;
    background: #000000;
    overflow: hidden;
    text-align: center;
    padding: 9rem 1.5rem 8rem;
    isolation: isolate;
}

.zeta-hero-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.zeta-hero-canvas canvas {
    display: block;
}

.zeta-hero-gradient-mask {
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        radial-gradient(ellipse at center, transparent 0%, transparent 40%, #000 90%),
        linear-gradient(to bottom, transparent 0%, #000 100%);
    pointer-events: none;
}

.zeta-hero-content {
    position: relative;
    z-index: 2;
}

.zeta-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #22d3ee;
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.25);
    padding: 0.45rem 1rem;
    border-radius: var(--zeta-radius-full);
    margin-bottom: 2rem;
}

.zeta-hero-eyebrow-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #22d3ee;
    box-shadow: 0 0 8px #22d3ee;
    animation: zetaPulse 1.8s ease-in-out infinite;
}

.zeta-hero-title {
    font-size: clamp(2.2rem, 6vw, 4.5rem);
    font-weight: 300;
    letter-spacing: -0.03em;
    color: #ffffff;
    line-height: 1.15;
    max-width: 60rem;
    margin: 0 auto;
}

.zeta-hero-title strong {
    display: block;
    margin-top: 0.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, #22d3ee, #6366f1);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.zeta-hero-subtitle {
    margin-top: 1.75rem;
    font-size: 1.15rem;
    color: #9ca3af;
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.zeta-hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2.5rem;
    flex-wrap: wrap;
}

.zeta-hero-cta .zeta-btn-primary {
    padding: 0.85rem 1.8rem;
    font-size: 0.95rem;
}

.zeta-hero-cta .zeta-btn-outline {
    padding: 0.85rem 1.8rem;
    font-size: 0.95rem;
    color: #e5e7eb;
    border-color: rgba(255, 255, 255, 0.15);
}

.zeta-hero-cta .zeta-btn-outline:hover {
    border-color: #22d3ee;
    color: #22d3ee;
}

.zeta-hero-stats {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    gap: clamp(1.5rem, 5vw, 4rem);
    margin-top: 4.5rem;
    flex-wrap: wrap;
}

.zeta-hero-stat {
    text-align: center;
}

.zeta-hero-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #ffffff;
    font-variant-numeric: tabular-nums;
}

.zeta-hero-stat-label {
    font-size: 0.8rem;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

.zeta-hero-legend {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    gap: 1.75rem;
    font-size: 0.78rem;
    color: #9ca3af;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0 1rem;
}

.zeta-hero-legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.zeta-hero-legend-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    flex-shrink: 0;
}

.zeta-legend-ai { background: #22d3ee; box-shadow: 0 0 8px #22d3ee; }
.zeta-legend-human { background: #f59e0b; box-shadow: 0 0 8px #f59e0b; }
.zeta-legend-data { background: #a78bfa; box-shadow: 0 0 8px #a78bfa; }

@media (max-width: 640px) {
    .zeta-hero { padding: 7rem 1.25rem 6rem; }
    .zeta-hero-legend { display: none; }
}

/* ===== Featured Projects ===== */
.zeta-section {
    padding: 5.5rem 1.5rem;
}

.zeta-section-alt {
    background: var(--zeta-bg-soft);
}

.zeta-featured-list {
    max-width: var(--zeta-max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 5rem;
}

.zeta-featured-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.zeta-featured-item:nth-child(even) .zeta-featured-media {
    order: 2;
}

.zeta-featured-media {
    border-radius: var(--zeta-radius-lg);
    overflow: hidden;
    box-shadow: var(--zeta-shadow);
    transition: var(--zeta-transition-slow);
}

.zeta-featured-media:hover {
    box-shadow: var(--zeta-shadow-lg);
    transform: translateY(-4px);
}

.zeta-featured-media img {
    width: 100%;
    height: 22rem;
    object-fit: cover;
}

.zeta-featured-title {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--zeta-text);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.zeta-featured-desc {
    color: var(--zeta-text-soft);
    font-size: 1.05rem;
    line-height: 1.75;
    margin-bottom: 1.5rem;
}

.zeta-featured-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.zeta-link-arrow {
    color: var(--zeta-primary);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--zeta-transition);
}

.zeta-link-arrow:hover {
    color: var(--zeta-primary-hover);
    text-decoration: underline;
}

@media (max-width: 860px) {
    .zeta-featured-item {
        grid-template-columns: 1fr;
    }
    .zeta-featured-item:nth-child(even) .zeta-featured-media {
        order: 0;
    }
}

/* ===== About Preview ===== */
.zeta-about-grid {
    max-width: var(--zeta-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4.5rem;
    align-items: center;
}

.zeta-about-title {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--zeta-text);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.zeta-about-title strong {
    font-weight: 700;
}

.zeta-about-desc {
    color: var(--zeta-text-soft);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.75rem;
}

.zeta-about-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.zeta-about-list li {
    color: var(--zeta-text-soft);
    font-size: 1rem;
    padding-left: 1.4rem;
    position: relative;
    line-height: 1.6;
}

.zeta-about-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--zeta-primary);
}

.zeta-about-media {
    border-radius: var(--zeta-radius-lg);
    overflow: hidden;
    box-shadow: var(--zeta-shadow);
    transition: var(--zeta-transition-slow);
}

.zeta-about-media:hover {
    box-shadow: var(--zeta-shadow-lg);
    transform: translateY(-4px);
}

.zeta-about-media img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

@media (max-width: 860px) {
    .zeta-about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}