/* ===================================
   RESPONSIVE DESIGN
   =================================== */

/* Tablet: 640px - 1024px */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .hero-image-wrapper {
        width: 280px;
        height: 280px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-socials {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: left;
    }
    
    .about-details {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    
    .about-languages {
        justify-content: flex-start;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-info,
    .contact-form-wrapper {
        padding: var(--spacing-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}

/* Mobile: < 640px */
@media (max-width: 640px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }

    /* Hide horizontal scrollbar and lock overflow */
    body {
        overflow-x: hidden;
    }

    html {
        overflow-x: hidden;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
        overflow-x: hidden;
    }
    
    /* Navbar */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: var(--spacing-xl) var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-base);
        z-index: 999;
        overflow-y: auto;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: var(--spacing-md) 0;
        font-size: var(--font-size-lg);
        font-weight: 500;
        color: var(--dark);
        border-bottom: 1px solid var(--border);
        text-align: left;
    }

    .nav-link:hover,
    .nav-link.active {
        color: var(--primary);
        background: linear-gradient(90deg, rgba(37, 99, 235, 0.05), transparent);
        padding-left: var(--spacing-sm);
    }

    .nav-link::after {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
        order: -1;
        margin-right: auto;
    }

    .navbar .container {
        justify-content: space-between;
    }

    .theme-toggle {
        order: 1;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* Hero */
    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }
    
    .hero-image-wrapper {
        width: 200px;
        height: 200px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    /* About */
    .about-image-wrapper {
        width: 200px;
        height: 200px;
    }
    
    .about-details {
        grid-template-columns: 1fr;
    }

    .about-text {
        padding: var(--spacing-lg);
    }

    .about-text h3 {
        font-size: var(--font-size-2xl);
    }

    .about-detail-item {
        padding: 0.9rem;
    }

    /* Skills */
    .skills-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--spacing-sm);
    }

    .skill-card {
        padding: var(--spacing-md);
    }

    .skill-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.4rem;
        margin-bottom: 0.85rem;
    }

    .skill-name {
        font-size: 0.95rem;
    }

    .skill-level {
        font-size: 0.8rem;
    }

    .skill-bar {
        height: 8px;
        margin-bottom: 0.7rem;
    }

    .skill-category {
        padding: 0.3rem 0.6rem;
        font-size: 0.65rem;
    }

    .skills-actions {
        margin-top: var(--spacing-lg);
    }
    
    /* Experience */
    .experience-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .experience-column-header {
        padding: var(--spacing-lg);
    }

    .experience-column-header h3 {
        font-size: var(--font-size-xl);
    }

    .experience-card {
        padding: var(--spacing-md);
    }

    .experience-card-title {
        font-size: var(--font-size-xl);
    }
    
    /* Projects */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    /* Certifications */
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    /* Contact */
    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-detail-item {
        align-items: center;
    }

    .contact-text .value {
        font-size: var(--font-size-base);
    }

    .contact-form-wrapper {
        padding: var(--spacing-lg);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Modal */
    .modal-content {
        margin: var(--spacing-sm);
    }
    
    .modal-body {
        padding: var(--spacing-lg);
    }
    
    .modal-links {
        flex-direction: column;
    }
    
    /* Back to Top */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* Small Mobile: < 480px */
@media (max-width: 480px) {
    :root {
        --font-size-5xl: 1.875rem;
        --font-size-4xl: 1.5rem;
        --font-size-3xl: 1.25rem;
    }
    
    .hero-greeting {
        font-size: var(--font-size-lg);
    }
    
    .hero-image-wrapper {
        width: 150px;
        height: 150px;
    }
    
    .about-image-wrapper {
        width: 150px;
        height: 150px;
    }

    .about-text {
        padding: var(--spacing-md);
    }

    .about-detail-item {
        gap: 0.75rem;
    }

    .about-detail-icon {
        width: 40px;
        height: 40px;
        border-radius: 12px;
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .skills-filter,
    .projects-filter {
        gap: var(--spacing-xs);
    }
    
    .filter-btn,
    .project-filter-btn {
        padding: 8px 16px;
        font-size: var(--font-size-sm);
    }

    .skills-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.75rem;
    }

    .skill-card {
        padding: 0.9rem;
        border-radius: var(--radius-md);
    }

    .skill-name {
        font-size: 0.88rem;
    }

    .skill-level {
        font-size: 0.76rem;
    }

    .skill-category {
        font-size: 0.6rem;
        padding: 0.28rem 0.5rem;
    }

    .section-description {
        font-size: var(--font-size-sm);
    }

    .skills-toggle {
        width: 100%;
        max-width: 280px;
    }
    
    /* Experience mobile */
    .experience-column-header {
        padding: var(--spacing-md);
    }

    .experience-column-kicker {
        font-size: 0.68rem;
    }

    .experience-column-header h3 {
        font-size: 1.05rem;
    }

    .experience-column-header p,
    .experience-card-description,
    .experience-card-highlights li {
        font-size: 0.85rem;
    }

    .experience-card-title {
        font-size: 1.15rem;
    }

    .experience-card-company,
    .experience-card-meta span {
        font-size: 0.8rem;
    }

    .experience-card-meta {
        gap: 0.55rem;
    }

    .experience-card-image {
        width: 84px;
        height: 84px;
    }
}

/* Landscape orientation on mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    
    .hero-image-wrapper {
        width: 150px;
        height: 150px;
    }
}

/* Print styles */
@media print {
    .navbar,
    .theme-toggle,
    .back-to-top,
    .modal,
    .scroll-indicator {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .section {
        padding: 20px 0;
        page-break-inside: avoid;
    }
}