.page-nav {
    padding: 30px 0;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s ease;
    padding: 10px 15px;
    border-radius: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
}

.back-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateX(-5px);
}

.back-btn svg {
    width: 18px;
    height: 18px;
}

/* Portfolio Page */
.portfolio-page {
    padding: 20px 0 60px;
}

/* Hero Section */
.portfolio-hero {
    text-align: center;
    padding: 40px 0 60px;
}

.portfolio-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 10px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.portfolio-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

/* Filters */
.portfolio-filters {
    margin-bottom: 40px;
}

.filter-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

/* Portfolio Grid */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.portfolio-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

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

.portfolio-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.portfolio-content {
    padding: 20px;
}

.portfolio-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.portfolio-tag {
    font-size: 12px;
    padding: 4px 10px;
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    border-radius: 12px;
    font-weight: 500;
}

.portfolio-title-card {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.portfolio-description {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
}

.portfolio-links {
    display: flex;
    gap: 12px;
}

.portfolio-link,
.portfolio-link-demo {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.portfolio-link {
    color: var(--text-secondary);
}

.portfolio-link:hover {
    color: var(--text-primary);
}

.portfolio-link-demo {
    color: var(--primary);
}

.portfolio-link-demo:hover {
    color: var(--primary-hover);
}

.portfolio-link svg,
.portfolio-link-demo svg {
    width: 16px;
    height: 16px;
}

/* CTA Section */
.portfolio-cta {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 50px 30px;
    text-align: center;
    border: 1px solid var(--border);
    margin-top: 40px;
}

.cta-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.cta-text {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card-hover);
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.contact-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.contact-btn svg {
    width: 20px;
    height: 20px;
}

/* Responsive */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

@media (max-width: 768px) {
    .portfolio-title {
        font-size: 36px;
    }

    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }

    .filter-buttons {
        gap: 8px;
    }

    .filter-btn {
        padding: 8px 18px;
        font-size: 13px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .telegram-btn,
    .contact-btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

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

    .portfolio-cta {
        padding: 30px 20px;
    }

    .cta-title {
        font-size: 24px;
    }
}