.tech-stack-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
    padding: 100px 10%;
    max-width: 1400px;
    margin: 0 auto;
}

.tech-card {
    --icon-size: 80px;
    --icon-scale: 1;
    --icon-invert: 0;
    --icon-brightness: 1;

    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 20px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.tech-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 210, 255, 0.2);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.icon-wrapper {
    width: var(--icon-size);
    height: var(--icon-size);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 0 10px rgba(0, 210, 255, 0.1));
}

.icon-wrapper img {
    width: 100%;
    height: 100%;
    transform: scale(var(--icon-scale));
    object-fit: contain;
    filter: invert(var(--icon-invert)) brightness(var(--icon-brightness));
}

.tech-card:hover .icon-wrapper {
    transform: scale(1.1);
}

.tech-card span {
    font-size: 1.1rem;
    color: #cccccc;
    font-weight: 500;
}

.back-link {
    position: fixed;
    top: 30px;
    left: 30px;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    font-size: 0.9rem;
    z-index: 100;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.back-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-5px);
}

@media (max-width: 768px) {
    .tech-stack-container {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        padding: 80px 5%;
        gap: 15px;
    }

    .tech-card {
        padding: 25px 10px;
        --icon-size: 60px !important;
        /* Force smaller size on mobile */
    }

    .tech-card span {
        font-size: 0.9rem;
    }

    .back-link {
        top: 15px;
        left: 15px;
        padding: 8px 16px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .tech-stack-container {
        grid-template-columns: repeat(2, 1fr);
        /* Force 2 columns on very small screens */
        gap: 10px;
        padding-top: 70px;
    }

    .tech-card {
        padding: 20px 5px;
        --icon-size: 50px !important;
    }
}