.portfolio-section {
    padding: 120px 0 80px;
}
.portfolio-section .title {
    text-align: center;
    margin-bottom: 48px;
}
.portfolio-section .title h4 {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: #f9643d;
    margin-bottom: 8px;
}
.portfolio-section .title h2 {
    font-size: 36px;
    font-weight: 700;
    color: #232323;
    margin-bottom: 8px;
}
.portfolio-section .title .border {
    display: block;
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, #f9643d, #fe2a77);
    border-radius: 2px;
    margin: 0 auto 16px;
}
.portfolio-section .title p {
    color: #777;
    font-size: 15px;
}

.filtr-container {
    max-width: 1366px;
    margin: 0 auto;
}
.portfolio-block {
    position: relative;
    height: 300px;
    overflow: hidden;
    cursor: pointer;
    filter: grayscale(1);
    transition: filter 0.3s ease;
    display: block;
    text-decoration: none;
}
.portfolio-block:hover {
    filter: grayscale(0);
}
.portfolio-block img {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
}
.portfolio-block::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,.75));
    z-index: 1;
}
.portfolio-block .caption {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 16px 20px;
    z-index: 2;
}
.portfolio-block .category {
    display: block;
    color: #fff;
    text-transform: uppercase;
    font-size: 0.7rem;
    opacity: .85;
    margin-bottom: 4px;
}
.portfolio-block h4 {
    color: #fff;
    margin: 0;
    font-size: 1rem;
}