.stack {
    padding: 100px 5%;
}

.stack-inner { max-width: 1280px; margin: 0 auto; }

.stack-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    margin-top: var(--space-10);
}

.stack-category h3 {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.02em;
}

.stack-category h3::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-symbol);
    border-radius: 1px;
    transform: rotate(45deg);
}

.stack-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stack-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border: 2px solid var(--nb-border);
    border-radius: var(--nb-radius);
    background: var(--bg-primary);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--text-primary);
    box-shadow: 3px 3px 0 var(--nb-shadow);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.25s ease,
                background-color 0.25s ease,
                color 0.25s ease;
}

.stack-item:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--nb-shadow);
    background: var(--accent);
    color: var(--accent-ink);
}

.stack-item .stack-status {
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    transition: color 0.25s ease;
}

.stack-item .stack-status.active {
    color: var(--accent-symbol);
    font-weight: 600;
}

.stack-item:hover .stack-status,
.stack-item:hover .stack-status.active {
    color: var(--accent-ink);
    opacity: 0.75;
}

@media (max-width: 768px) {
    .stack { padding: 70px 5%; }
    .stack-grid { grid-template-columns: 1fr; gap: var(--space-6); }
}