/* ============================================
        PORTFOLIO
============================================ */

.portfolio {
    position: relative;
    padding: 160px 0;
    overflow: hidden;
    background: var(--bg);
    transition: background .4s ease;
}

.portfolio .container {
    width: min(1320px, 92%);
    margin: auto;
    position: relative;
    z-index: 3;
}

.portfolio-header {
    max-width: 900px;
    margin: 0 auto 70px;
    text-align: center;
}

/* ============================================
        FILTER
============================================ */

.portfolio-filter {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 14px;
    margin-bottom: 70px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 13px 30px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all .35s ease;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--accent-border);
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-2), var(--accent) 55%, var(--accent-3));
    opacity: 0;
    transition: opacity .35s ease;
    z-index: -1;
}

.filter-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-3px);
}

.filter-btn.active {
    color: var(--bg);
    border-color: transparent;
    box-shadow: 0 10px 28px var(--accent-glow);
}

.filter-btn.active::before {
    opacity: 1;
}

/* ============================================
        GRID
============================================ */

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 35px;
}

.portfolio-card {
    position: relative;
    overflow: hidden;
    border-radius: 32px;
    background: var(--bg-card);
    border: 1px solid var(--accent-border);
    box-shadow: 0 20px 50px var(--shadow);
    transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease, opacity .45s ease;
}

.portfolio-card.hidden {
    display: none;
}

.portfolio-card:hover {
    transform: translateY(-12px);
    border-color: var(--accent);
    box-shadow: 0 30px 70px var(--shadow-strong), 0 0 45px var(--accent-glow);
}

/* ============================================
        IMAGE
============================================ */

.portfolio-image {
    position: relative;
    width: 100%;
    height: 380px;
    overflow: hidden;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
}

.portfolio-card:hover img {
    transform: scale(1.08);
}

/* Badge */
.portfolio-badge {
    position: absolute;
    top: 18px;
    right: 18px;
    z-index: 3;
    padding: 9px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 800;
    color: var(--accent);
    background: var(--bg-card);
    border: 1px solid var(--accent-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: background .35s ease, color .35s ease;
}

.portfolio-card:hover .portfolio-badge {
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    color: var(--bg);
}

/* Overlay */
.portfolio-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    background: linear-gradient(to top, var(--bg-soft), transparent 75%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: opacity .4s ease;
    z-index: 2;
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    font-size: 15px;
    color: var(--bg);
    background: linear-gradient(135deg, var(--accent-2), var(--accent) 55%, var(--accent-3));
    box-shadow: 0 12px 35px var(--accent-glow);
    transform: translateY(15px);
    transition: transform .4s ease, box-shadow .35s ease;
}

.portfolio-card:hover .portfolio-overlay a {
    transform: translateY(0);
}

.portfolio-overlay a span {
    transition: transform .35s ease;
}

.portfolio-card:hover .portfolio-overlay a span {
    transform: translateX(8px);
}

.portfolio-overlay a:hover {
    box-shadow: 0 18px 45px var(--accent-glow-strong);
}

/* ============================================
        CONTENT
============================================ */

.portfolio-content {
    padding: 32px;
}

.portfolio-content h3 {
    margin: 0 0 15px;
    font-size: 25px;
    font-weight: 800;
    color: var(--text);
}

.portfolio-content p {
    margin: 0;
    font-size: 16px;
    line-height: 2;
    color: var(--text-muted);
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.portfolio-tags span {
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
    transition: background .3s ease;
}

.portfolio-tags span:hover {
    background: var(--accent);
    color: var(--bg);
}

/* ============================================
        RESPONSIVE
============================================ */

@media (max-width: 1100px) {
    .portfolio-grid { grid-template-columns: 1fr; }
    .portfolio-image { height: 420px; }
}

@media (max-width: 900px) {
    .portfolio { padding: 120px 0; }
    .portfolio-header { margin-bottom: 60px; }
    .portfolio-filter { margin-bottom: 50px; }
}

@media (max-width: 768px) {
    .portfolio { padding: 90px 0; }
    .portfolio-title { font-size: 38px; }
    .portfolio-description { font-size: 16px; line-height: 2; }
    .portfolio-filter { gap: 10px; }
    .filter-btn { padding: 10px 20px; font-size: 14px; }
    .portfolio-card { border-radius: 25px; }
    .portfolio-image { height: 300px; }
    .portfolio-content { padding: 25px; }
    .portfolio-content h3 { font-size: 23px; }
    .portfolio-content p { font-size: 15px; }

    .portfolio-overlay {
        opacity: 1;
        background: linear-gradient(to top, rgba(0, 0, 0, .6), transparent 85%);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .portfolio-overlay a {
        transform: none;
        padding: 12px 24px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .portfolio-tag { font-size: 12px; padding: 10px 22px; }
    .portfolio-title { font-size: 32px; }
    .portfolio-filter { flex-direction: column; width: 100%; }
    .filter-btn { width: 100%; max-width: 260px; }
    .portfolio-image { height: 240px; }
    .portfolio-content { padding: 22px; }
}