/* Portfolio Page Styles */
.page-header {
    padding: 120px 0 60px;
    background: var(--gradient-dark);
    color: var(--white);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1.25rem;
    opacity: 0.9;
}

.portfolio-section {
    padding: var(--spacing-xl) 0;
}

.portfolio-notice {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(0, 163, 255, 0.05) 100%);
    border-left: 4px solid var(--primary-blue);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.portfolio-notice p:first-child {
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.portfolio-notice p:last-child {
    color: var(--gray-dark);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border: 2px solid var(--primary-blue);
    background: transparent;
    color: var(--primary-blue);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: var(--font-primary);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--white);
    transform: translateY(-2px);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.portfolio-item {
    background: var(--navy-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid rgba(230, 241, 255, 0.05);
    /* Subtle border for dark theme */
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    background: var(--navy-lighter);
}

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

.portfolio-image {
    position: relative;
    width: 100%;
    padding-top: 60%;
    overflow: hidden;
    background: var(--navy-lighter);
}

.project-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.portfolio-item:hover .project-img {
    transform: scale(1.1);
}

.placeholder-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.portfolio-content {
    padding: var(--spacing-md);
}

.portfolio-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.portfolio-content p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.portfolio-tags {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.portfolio-tags span {
    padding: 4px 12px;
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-blue);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.view-project {
    width: 100%;
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
    }

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