.portfolio-hero {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: var(--color-text-on-dark);
    padding: 120px 0 60px;
    text-align: center;
    margin-top: 70px;
}

.portfolio-hero h1 {
    margin-bottom: 1rem;
}

.portfolio-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 40px 0 30px;
}

.filter-btn {
    padding: 10px 20px;
    background: #f8f9fa;
    border: 1px solid #eaeaea;
    border-radius: 30px;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.portfolio-item {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    opacity: 1;
    transform: translateY(0);
}

.portfolio-item.hidden {
    display: none;
    opacity: 0;
    transform: translateY(20px);
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.portfolio-image {
    height: 250px;
    width: 100%;
    background: linear-gradient(135deg, #f0f8ff, #e1f0ff);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 3.5rem;
    position: relative;
    overflow: hidden;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.portfolio-category {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 84, 163, 0.9);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.portfolio-content {
    padding: 25px;
}

.portfolio-content h3 {
    margin-bottom: 10px;
    color: var(--color-accent);
}

.portfolio-client {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 15px 0;
}

.portfolio-tag {
    background: #f0f8ff;
    color: var(--color-accent);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.portfolio-stats {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid #f0f0f0;
    padding-top: 15px;
    margin-top: 20px;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-weight: 700;
    color: var(--color-accent);
    font-size: 1.1rem;
}

.work-moments {
    background: linear-gradient(135deg, #f8fafc, #eef5ff);
    padding: 80px 0;
    margin: 60px 0;
}

.moments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.moment-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.moment-image {
    height: 200px;
    width: 100%;
    background: #f0f8ff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--color-accent);
}

.moment-content {
    padding: 20px;
}

.moment-content h4 {
    color: var(--color-accent);
    margin-bottom: 10px;
}

.stats-section {
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.stat-card {
    text-align: center;
    padding: 30px 20px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border-top: 4px solid var(--color-accent);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 10px;
}

.case-study {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 50px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.case-header {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: white;
    padding: 40px;
    text-align: center;
}

.case-body {
    padding: 40px;
}

.case-challenge,
.case-solution,
.case-results {
    margin-bottom: 30px;
}

.case-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.result-item {
    background: #f8fafc;
    padding: 20px;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-accent);
}

@media (max-width: 768px) {
    .portfolio-hero {
        padding: 100px 0 40px;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }

    .case-body {
        padding: 25px;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.portfolio-item {
    animation: fadeIn 0.6s ease-out;
}