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

/* Tablets (768px and up) */
@media (max-width: 1024px) {
    :root {
        --size-7xl: 64px;
        --size-6xl: 56px;
        --size-5xl: 40px;
        --spacing-3xl: 4rem;
    }

    .nav-links {
        gap: var(--spacing-lg);
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: 100%;
        padding-left: var(--spacing-2xl);
        padding-right: 0;
        text-align: left;
        margin-left: 0;
        margin-right: 0;
    }

    .timeline-marker {
        left: 0;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (768px and below) */
@media (max-width: 768px) {
    :root {
        --size-7xl: 48px;
        --size-6xl: 40px;
        --size-5xl: 32px;
        --size-4xl: 28px;
        --size-3xl: 24px;
        --spacing-3xl: 3rem;
        --spacing-2xl: 2rem;
        --spacing-xl: 1.5rem;
    }

    /* Navigation */
    .nav-links {
        display: none;
    }

    .nav-menu-btn {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    /* Hero */
    .hero {
        padding-top: 60px;
        min-height: calc(100vh - 60px);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: var(--size-xl);
    }

    .hero-cta {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .cta-primary, .cta-secondary {
        width: 100%;
        justify-content: center;
    }

    /* Sections */
    .section {
        padding: var(--spacing-2xl) 0;
    }

    .section-header {
        margin-bottom: var(--spacing-2xl);
    }

    .section-title {
        font-size: 2rem;
    }

    /* About */
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .stat-item {
        justify-content: flex-start;
    }

    /* Skills */
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    /* Projects */
    .projects-showcase {
        grid-template-columns: 1fr;
    }

    .project-card.large {
        grid-column: span 1;
    }

    .project-image {
        aspect-ratio: 16 / 12;
    }

    /* Timeline */
    .timeline::before {
        left: 0;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: 100%;
        padding-left: var(--spacing-2xl);
        padding-right: 0;
        text-align: left;
        margin-left: 0;
        margin-right: 0;
    }

    .timeline-marker {
        left: 0;
    }

    /* Contact */
    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-form {
        gap: var(--spacing-lg);
    }

    /* Footer */
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-column {
        text-align: left;
    }

    /* Quote */
    .quote {
        font-size: 1.5rem;
    }
}

/* Small mobile (480px and below) */
@media (max-width: 480px) {
    :root {
        --size-7xl: 36px;
        --size-6xl: 32px;
        --size-5xl: 28px;
        --size-4xl: 24px;
        --size-3xl: 20px;
        --size-2xl: 18px;
        --spacing-3xl: 2rem;
        --spacing-2xl: 1.5rem;
        --spacing-lg: 1rem;
    }

    /* Navigation */
    .nav {
        height: 50px;
    }

    .nav-content {
        padding: 0 var(--spacing-md);
    }

    .nav-logo {
        font-size: var(--size-lg);
    }

    /* Hero */
    .hero {
        padding-top: 50px;
    }

    .hero-title {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-lg);
    }

    .hero-subtitle {
        font-size: var(--size-lg);
    }

    .hero-description {
        font-size: var(--size-base);
    }

    .cta-primary, .cta-secondary {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--size-sm);
    }

    /* Sections */
    .section {
        padding: var(--spacing-2xl) 0;
    }

    .section-container {
        padding: 0 var(--spacing-md);
    }

    .section-header {
        margin-bottom: var(--spacing-2xl);
    }

    .section-label {
        font-size: var(--size-xs);
    }

    .section-title {
        font-size: 1.5rem;
    }

    /* About */
    .about-intro {
        font-size: var(--size-lg);
    }

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

    .about-stats {
        gap: var(--spacing-md);
    }

    .stat-number {
        font-size: var(--size-3xl);
    }

    /* Skills */
    .skill-card {
        padding: var(--spacing-lg);
    }

    .skill-icon {
        width: 50px;
        height: 50px;
    }

    .skill-title {
        font-size: var(--size-lg);
    }

    /* Projects */
    .project-info {
        padding: var(--spacing-lg);
    }

    .project-title {
        font-size: var(--size-lg);
    }

    .project-description {
        font-size: var(--size-xs);
    }

    /* Timeline */
    .timeline-item {
        margin-bottom: var(--spacing-2xl);
    }

    .timeline-date {
        font-size: var(--size-xs);
    }

    .timeline-title {
        font-size: var(--size-lg);
    }

    .timeline-company {
        font-size: var(--size-xs);
    }

    .timeline-description {
        font-size: var(--size-xs);
    }

    /* Contact */
    .contact-item {
        gap: var(--spacing-md);
    }

    .contact-icon {
        width: 40px;
        height: 40px;
    }

    .contact-label {
        font-size: var(--size-xs);
    }

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

    .form-group input,
    .form-group textarea {
        padding: var(--spacing-md) 0;
    }

    .submit-btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--size-sm);
    }

    /* Footer */
    .footer {
        padding: var(--spacing-2xl) 0 var(--spacing-lg);
    }

    .footer-content {
        padding: 0 var(--spacing-md);
    }

    .footer-main {
        gap: var(--spacing-2xl);
        margin-bottom: var(--spacing-2xl);
        padding-bottom: var(--spacing-2xl);
    }

    .footer-logo {
        font-size: var(--size-lg);
    }

    .footer-links {
        gap: var(--spacing-lg);
    }

    .footer-column h4 {
        font-size: var(--size-xs);
    }

    .footer-column a {
        font-size: var(--size-xs);
    }

    .footer-bottom {
        font-size: var(--size-xs);
    }

    /* Quote */
    .quote {
        font-size: 1.25rem;
    }

    .quote cite {
        font-size: var(--size-base);
    }

    /* Scroll indicator */
    .scroll-indicator {
        bottom: 20px;
    }
}

/* Extra small mobile (320px and below) */
@media (max-width: 320px) {
    :root {
        --size-7xl: 28px;
        --size-6xl: 24px;
        --size-5xl: 20px;
        --spacing-3xl: 1.5rem;
        --spacing-2xl: 1rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .stat-number {
        font-size: var(--size-2xl);
    }
}

/* Landscape orientation */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: var(--spacing-2xl) 0;
    }

    .scroll-indicator {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: var(--size-base);
    }

    .hero-description {
        display: none;
    }

    .hero-cta {
        gap: var(--spacing-sm);
    }

    .cta-primary, .cta-secondary {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--size-sm);
    }
}

/* Print styles */
@media print {
    .nav,
    .mobile-menu,
    .scroll-indicator,
    .footer {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .section {
        page-break-inside: avoid;
        padding: 1rem 0;
    }

    .project-card,
    .skill-card {
        page-break-inside: avoid;
    }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #fff;
        --color-secondary: #000;
        --color-text: #f5f5f7;
        --color-text-secondary: #a1a1a6;
        --color-border: #424245;
        --color-bg: #1d1d1f;
        --color-accent-light: #2a2a2d;
    }

    body {
        background-color: var(--color-bg);
        color: var(--color-text);
    }

    .nav {
        background: rgba(29, 29, 31, 0.8);
        border-bottom-color: rgba(255, 255, 255, 0.1);
    }

    .nav.scrolled {
        background: rgba(29, 29, 31, 0.95);
        border-bottom-color: rgba(255, 255, 255, 0.15);
    }

    .about {
        background: linear-gradient(180deg, #1d1d1f 0%, #2a2a2d 100%);
    }

    .skills {
        background: linear-gradient(180deg, #2a2a2d 0%, #1d1d1f 100%);
    }

    .projects {
        background: linear-gradient(180deg, #1d1d1f 0%, #2a2a2d 100%);
    }

    .experience {
        background: linear-gradient(180deg, #2a2a2d 0%, #1d1d1f 100%);
    }

    .contact {
        background: linear-gradient(180deg, #1d1d1f 0%, #2a2a2d 100%);
    }

    .skill-card,
    .project-card {
        background: rgba(255, 255, 255, 0.05);
        border-color: rgba(255, 255, 255, 0.1);
    }

    .skill-card:hover,
    .project-card:hover {
        border-color: rgba(102, 126, 234, 0.3);
    }

    .form-group input,
    .form-group textarea {
        background: transparent;
        color: var(--color-text);
        border-bottom-color: rgba(255, 255, 255, 0.1);
    }

    .form-group input:focus,
    .form-group textarea:focus {
        border-bottom-color: var(--color-accent);
    }

    .footer {
        background: #000;
    }
}