.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    text-align: center;
}

.skill {
    background: #333c56;
    padding: 20px;
    border-radius: 8px;
    font-size: 1.1rem;
    color: #fff;
    transition: transform 0.3s ease, background 0.3s ease;
    cursor: pointer;
}

.skill i {
    display: block;
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.skill:hover {
    transform: translateY(-5px);
    background: #444a66;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    margin-top: 2rem;
}

.skill-card {
    width: 160px;
    height: 160px;
    perspective: 1000px;
}

.skill-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
}

.skill-card:hover .skill-inner {
    transform: rotateY(180deg);
}

.skill-front,
.skill-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    border-radius: 1rem;
    box-shadow: 0 0 12px rgba(0, 0, 0, 0.15);
    background: var(--main-bg-color);
    color: var(--main-text-color);
}

.skill-front {
    background: var(--card-bg, rgba(255, 255, 255, 0.05));
    color: var(--accent-color, #00ffff);
}

.skill-back {
    transform: rotateY(180deg);
    font-size: 1.1rem;
    padding: 1rem;
    text-align: center;
    background: var(--highlight-bg, #222);
    color: var(--highlight-text, #fff);
}