/* Advanced Styles for Kalberis Portfolio */

/* ===== NAVIGATION ===== */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.15);
}

.navbar-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-decoration: none;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--px-theme);
    line-height: 1;
}

.brand-subtitle {
    font-size: 0.8rem;
    color: #666;
    font-weight: 400;
    margin-top: -2px;
}

.nav-link {
    font-weight: 500;
    color: #333 !important;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--px-theme) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--px-theme);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ===== ABOUT SECTION ===== */
.about-section {
    padding: 100px 0;
}

.about-content {
    padding-right: 2rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--bs-heading-color);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(45deg, var(--px-theme), #2563eb);
    border-radius: 2px;
}

.about-stats {
    margin: 2rem 0;
}

.stat-item {
    padding: 1rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--px-theme);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: linear-gradient(45deg, var(--px-theme), #2563eb);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: transform 0.3s ease;
}

.skill-tag:hover {
    transform: scale(1.05);
}

.about-image-wrapper {
    position: relative;
    padding: 2rem;
}

.about-image-wrapper img {
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 2;
}

.about-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--px-theme), #2563eb);
    border-radius: 20px;
    opacity: 0.1;
    transform: rotate(6deg);
    z-index: 1;
}

/* ===== PORTFOLIO SECTION ===== */
.portfolio-section {
    padding: 100px 0;
}

.portfolio-filter {
    margin-bottom: 3rem;
}

.filter-btn {
    background: transparent;
    border: 2px solid #e0e0e0;
    color: #666;
    padding: 0.5rem 1.5rem;
    margin: 0 0.5rem;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.5s ease;
}

.portfolio-item.show {
    opacity: 1;
    transform: scale(1);
}

.portfolio-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    height: 100%;
}

.portfolio-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

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

.portfolio-card:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(58, 134, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

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

.portfolio-info {
    text-align: center;
    color: white;
    padding: 2rem;
}

.portfolio-info h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.portfolio-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.portfolio-link {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.portfolio-link:hover {
    background: white;
    color: var(--px-theme);
    transform: scale(1.1);
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: var(--px-gray-2);
    color: #666;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.testimonials-section .section-title::after {
    background: white;
}

.testimonials-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.testimonial-item {
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.testimonial-item.active {
    display: block;
    opacity: 1;
}

.testimonial-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.testimonial-text p {
    font-size: 1.2rem;
    font-style: italic;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.author-photo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.3);
}

.author-info h5 {
    margin: 0;
    font-weight: 600;
}

.author-info span {
    font-size: 0.9rem;
    opacity: 0.8;
}

.testimonial-rating {
    color: #fbbf24;
    font-size: 1.2rem;
}

.testimonials-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.control-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.testimonials-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active,
.dot:hover {
    background: white;
    transform: scale(1.2);
}

/* ===== CONTACT SECTION ===== */
.contact-section {
    padding: 100px 0;
}

.contact-info {
    padding-right: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, var(--px-theme), #2563eb);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details h4 {
    margin-bottom: 0.5rem;
    color: var(--bs-heading-color);
}

.contact-details p {
    margin-bottom: 0.5rem;
    color: #666;
    font-size: 0.9rem;
}

.contact-link {
    color: var(--px-theme);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: #2563eb;
}

.contact-social {
    margin-top: 2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    background: var(--px-gray-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--px-theme);
    color: white;
    transform: translateY(-3px);
}

.contact-form-wrapper {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--bs-heading-color);
    margin-bottom: 0.5rem;
    display: block;
}

.form-control {
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--px-theme);
    box-shadow: 0 0 0 3px rgba(58, 134, 255, 0.1);
}

.btn-primary {
    background: linear-gradient(45deg, var(--px-theme), #2563eb);
    border: none;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(58, 134, 255, 0.3);
}

/* ===== FOOTER ===== */
.footer {
    background: #1a1a1a !important;
    border-top: 1px solid #333;
}

.footer p {
    color: #ccc;
}

.text-danger {
    color: #ff6b6b !important;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .about-content {
        padding-right: 0;
        margin-bottom: 2rem;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonial-content {
        padding: 2rem;
    }
    
    .contact-info {
        padding-right: 0;
        margin-bottom: 2rem;
    }
    
    .contact-form-wrapper {
        padding: 2rem;
    }
    
    .navbar-brand {
        align-items: center;
    }
    
    .brand-text {
        font-size: 1.3rem;
    }
}

@media (max-width: 576px) {
    .stat-item {
        margin-bottom: 1rem;
    }
    
    .portfolio-filter {
        text-align: center;
    }
    
    .filter-btn {
        margin: 0.25rem;
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
    }
    
    .testimonials-controls {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ===== SCROLL ANIMATIONS ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===== LOADING STATES ===== */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}