.portfolio-main {
    padding-top: 100px;
}

.portfolio-hero {
    background: url('https://images.unsplash.com/photo-1454165804606-c3d57bc86b40?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 120px 5%;
    position: relative;
}

.portfolio-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
}

.portfolio-hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    position: relative;
}

.portfolio-hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.portfolio-categories {
    max-width: 1200px;
    margin: 50px auto;
    padding: 0 5%;
    text-align: center;
}

.category-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 30px;
}

.filter-btn {
    padding: 10px 25px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.portfolio-grid-expanded {
    max-width: 1200px;
    margin: 50px auto;
    padding: 0 5%;
}

.portfolio-item-expanded {
    display: flex;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 50px;
}

.portfolio-expanded-image {
    flex: 1;
}

.portfolio-expanded-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.portfolio-expanded-content {
    flex: 1;
    padding: 40px;
}

.portfolio-expanded-content h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--dark);
}

.portfolio-stats {
    display: flex;
    gap: 20px;
    margin: 25px 0;
}

.stat-item {
    text-align: center;
    padding: 15px;
    background: var(--light-blue);
    border-radius: 8px;
    flex: 1;
}

.stat-item h4 {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 14px;
    color: var(--gray);
}

.portfolio-expanded-content p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray);
    margin-bottom: 25px;
}

.portfolio-strategies {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
    list-style: none;
}

.portfolio-strategies li {
    background: var(--light-blue);
    color: var(--primary);
    padding: 8px 15px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
}

.portfolio-stats-section {
    background: var(--light-blue);
    padding: 80px 5%;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 50px auto 0;
}

.stat-card {
    background: white;
    padding: 40px 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.stat-card h3 {
    font-size: 42px;
    color: var(--primary);
    margin-bottom: 10px;
}

.stat-card p {
    color: var(--gray);
    font-size: 16px;
}

@media (max-width: 900px) {
    .portfolio-item-expanded {
        flex-direction: column;
    }
    
    .portfolio-expanded-image {
        height: 300px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .portfolio-hero h1 {
        font-size: 2.2rem;
    }
    
    .portfolio-expanded-content h3 {
        font-size: 24px;
    }
    
    .portfolio-stats {
        flex-direction: column;
    }
    
    .stat-item {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}