:root {
    --duet3d-teal: #19b8a6;
    --duet3d-teal-2: #0aa790;
    --duet3d-gold: #f4c454;
    --duet3d-ink: #1f2a44;
    --duet3d-muted: #7a8799;
    --duet3d-border: #e9eef4;
}

.duet3d-section {
    padding: 28px 8px;
}

.duet3d-grid {
    max-width: 1160px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(5, minmax(160px, 1fr));
    gap: 36px;
    align-items: start;
}

.duet3d-item {
    text-decoration: none;
    text-align: left;
}

.duet3d-icon {
    position: relative;
    display: inline-grid;
    place-items: center;
    width: 74px;
    height: 74px;
    border-radius: 18px;
    background: radial-gradient(
        120px 120px at 30% 25%,
        #20c7b7 0%,
        var(--duet3d-teal) 55%,
        var(--duet3d-teal-2) 100%
    );
    box-shadow: 0 10px 26px rgba(12, 128, 114, 0.22),
        inset 0 1px 0 rgba(255, 255, 255, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.35);
    margin-bottom: 12px;
    transition: transform 0.12s ease;
}
.duet3d-icon i {
    font-size: 34px; /* icon size */
    color: #fff;
    filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.12));
}
.duet3d-accent {
    position: absolute;
    bottom: -9px;
    left: 12px;
    width: 52px;
    height: 14px;
    background: var(--duet3d-gold);
    border-radius: 14px;
    box-shadow: 0 4px 10px rgba(244, 196, 84, 0.4);
}

.duet3d-title {
    margin: 18px 0 6px;
    font-weight: 700;
    font-size: 17px;
    color: var(--duet3d-ink);
}
.duet3d-text {
    margin: 0;
    font-size: 13.5px;
    line-height: 1.7;
    color: var(--duet3d-muted);
    max-width: 260px;
}

.duet3d-item:hover .duet3d-icon {
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 1100px) {
    .duet3d-grid {
        grid-template-columns: repeat(3, minmax(180px, 1fr));
        gap: 28px;
    }
}
@media (max-width: 720px) {
    .duet3d-grid {
        grid-template-columns: repeat(2, minmax(160px, 1fr));
    }
}
@media (max-width: 520px) {
    .duet3d-grid {
        grid-template-columns: 1fr;
    }
}