.stack-zones {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.25rem, 3vw, 2rem);
}

.zone {
    border-radius: var(--radius-lg);
    padding: clamp(1.5rem, 3vw, 2.2rem);
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    position: relative;
    overflow: hidden;
}

.zone::before {
    content: "";
    position: absolute;
    top: -40%;
    right: -20%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, var(--zone-glow, var(--accent-soft)), transparent 70%);
    pointer-events: none;
}

.zone-prod {
    --zone-glow: var(--accent-soft);
}

.zone-rnd {
    --zone-glow: var(--rnd-soft);
    border-style: dashed;
}

.zone-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    position: relative;
}

.zone-head h3 {
    font-size: 1.15rem;
}

.zone-head .status-dot {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.3rem 0.6rem;
    border-radius: 999px;
    border: 1px solid var(--border-strong);
    color: var(--text-secondary);
    white-space: nowrap;
}

.zone-prod .zone-head .status-dot {
    color: var(--accent);
    border-color: color-mix(in srgb, var(--accent) 50%, transparent);
}

.zone-rnd .zone-head .status-dot {
    color: var(--rnd);
    border-color: color-mix(in srgb, var(--rnd) 50%, transparent);
}

.zone p.zone-desc {
    margin-top: 0.6rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 46ch;
    position: relative;
}

.zone-chips {
    margin-top: 1.4rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    position: relative;
}

.stack-tag {
    background: var(--bg-elevated-2);
    color: var(--text-primary);
    transition: border-color var(--dur-sm) var(--ease), transform var(--dur-sm) var(--ease);
}

.zone-prod .stack-tag:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.zone-rnd .stack-tag:hover {
    border-color: var(--rnd);
    transform: translateY(-2px);
}

.stack-tag.weight-core {
    font-weight: 600;
}

.github-pulse {
    margin-top: clamp(1.25rem, 3vw, 1.75rem);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 1.1rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
}

.github-pulse-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.github-pulse-stats {
    display: flex;
    gap: 1.75rem;
    flex-wrap: wrap;
}

.gh-stat {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}

.gh-val {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
}

.gh-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.github-pulse .btn {
    margin-left: auto;
    padding: 0.55rem 1rem;
    font-size: 0.85rem;
}

@media (max-width: 780px) {
    .stack-zones {
        grid-template-columns: 1fr;
    }

    .github-pulse .btn {
        margin-left: 0;
    }
}