/* Reset default browser styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Body styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f0f0;
}

/* Portfolio Section */
#portfolio {
    max-width: 1200px;
    margin: 50px auto;
    padding: 0 20px;
}

/* Section Heading */
#portfolio h1 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 3em;
    color: #333;
}

/* Filter Buttons Container */
#filter-buttons {
    text-align: center;
    margin-bottom: 30px;
}

/* Filter Buttons Styles */
.filter-btn {
    background-color: #fff;
    color: #333;
    border: 2px solid #333;
    padding: 10px 20px;
    margin: 0 5px;
    cursor: pointer;
    border-radius: 30px;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: #333;
    color: #fff;
}

/* Portfolio Items Grid */
#portfolio-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

/* Portfolio Item */
.portfolio-item {
    position: relative;
    width: calc(25% - 20px);
    margin: 10px;
    overflow: hidden;
    border-radius: 10px;
    background-color: #fff;
    transition: transform 0.3s ease;
}

/* Portfolio Item Image */
.portfolio-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* Overlay Effect */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(51, 51, 51, 0.8);
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease;
}

/* Overlay Text */
.overlay h3 {
    color: #fff;
    font-size: 1.5em;
    text-align: center;
    padding: 0 10px;
}

/* Hover Effects */
.portfolio-item:hover .overlay {
    opacity: 1;
}

.portfolio-item:hover {
    transform: scale(1.05);
}


/* Responsive Layouts */
@media (max-width: 992px) {
    .portfolio-item {
        width: calc(33.333% - 20px);
    }
}

@media (max-width: 768px) {
    .portfolio-item {
        width: calc(50% - 20px);
    }
}

@media (max-width: 576px) {
    .portfolio-item {
        width: 100%;
        margin: 10px 0;
    }
}