/* Critical CSS Optimizations */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

/* Prevent layout shift during font loading */
.fonts-loading body {
    visibility: hidden;
}

.fonts-loaded body,
body {
    visibility: visible;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 4rem;
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

/* Focus Management for Accessibility */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--luxury-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

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

/* Performance optimizations for mobile */
@media (max-width: 768px) {
    * {
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
    }
}

:root {
    /* Dark Theme Only */
    --primary-bg: #0a0a0a;
    --secondary-bg: #1a1a1a;
    --accent-bg: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --accent-color: #666666;
    --luxury-accent: #d4af37;
    --neon-accent: #00ffff;
    --shadow-color: rgba(255, 255, 255, 0.1);
    --border-color: rgba(255, 255, 255, 0.1);
    
    /* Typography - Premium Font System */
    --font-heading: 'Fraunces', serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-display: 'Fraunces', serif;
    
    /* Advanced Typography Scale */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    --font-size-6xl: 3.75rem;   /* 60px */
    --font-size-7xl: 4.5rem;    /* 72px */
    
    /* Advanced Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Precise Letter Spacing */
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0em;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.1em;
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
}

body {
    font-family: var(--font-body);
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: var(--leading-relaxed);
    overflow-x: hidden;
    transition: all 0.3s ease;
    font-size: var(--font-size-base);
    font-weight: var(--font-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-variant-ligatures: common-ligatures;
    font-feature-settings: "kern" 1, "liga" 1, "clig" 1, "calt" 1;
    -webkit-overflow-scrolling: touch;
    touch-action: manipulation;
}

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem 5%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    transition: all 0.3s ease;
    will-change: transform;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-bold);
    color: var(--luxury-accent);
    letter-spacing: var(--tracking-wide);
    font-variation-settings: 'opsz' 14, 'wght' 700;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--font-medium);
    font-size: var(--font-size-base);
    letter-spacing: var(--tracking-normal);
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--luxury-accent);
    transform: translateY(-1px);
}

.nav-links a:focus-visible {
    color: var(--luxury-accent);
    outline: 2px solid var(--luxury-accent);
    outline-offset: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--luxury-accent);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Navigation CV Button */
.nav-cv-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--luxury-accent) 100%);
    color: var(--primary-bg);
    text-decoration: none;
    font-weight: var(--font-semibold);
    font-size: var(--font-size-sm);
    letter-spacing: var(--tracking-wide);
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav-cv-button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(212, 175, 55, 0.5);
    outline: 2px solid var(--text-primary);
    border-radius: 25px;
    outline-offset: 2px;
}

.nav-cv-button i {
    font-size: 0.9rem;
}

/* Navigation Right Container */
.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 4px;
    position: relative;
    z-index: 1001;
    min-width: 40px;
    min-height: 40px;
    justify-content: center;
    align-items: center;
}

.hamburger span {
    width: 24px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    transform-origin: center;
    border-radius: 1.5px;
    display: block;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.nav-links.mobile-menu {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: calc(100vh - 100px);
    background: var(--primary-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
    display: flex;
}

.nav-links.mobile-menu.active {
    transform: translateX(0);
}

.nav-links.mobile-menu a {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
}

.hero-content {
    max-width: 800px;
    padding: 0 2rem;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(var(--font-size-5xl), 8vw, var(--font-size-7xl));
    font-weight: var(--font-extrabold);
    line-height: var(--leading-none);
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--luxury-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: var(--tracking-tighter);
    font-variation-settings: 'opsz' 72, 'wght' 800;
}

.hero-subtitle {
    font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-2xl));
    color: var(--text-secondary);
    font-weight: var(--font-light);
    margin-bottom: 3rem;
    letter-spacing: var(--tracking-wide);
    line-height: var(--leading-relaxed);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-feature-settings: "kern" 1;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    background: linear-gradient(100deg, var(--text-primary) 0%, var(--luxury-accent) 100%);
    color: var(--primary-bg);
    text-decoration: none;
    font-weight: var(--font-semibold);
    font-size: var(--font-size-lg);
    letter-spacing: var(--tracking-normal);
    border-radius: 50px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    will-change: transform;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:focus-visible {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.6);
    outline: 2px solid var(--text-primary);
    outline-offset: 3px;
}

/* Section Styles */
.section {
    padding: 8rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
    font-weight: var(--font-bold);
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    letter-spacing: var(--tracking-tight);
    line-height: var(--leading-tight);
    font-variation-settings: 'opsz' 48, 'wght' 700;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.profile-photo {
    width: 100%;
    max-width: 300px;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 8px 24px var(--shadow-color);
    border: 2px solid var(--luxury-accent);
    display: block;
    margin: 0 auto;
}

.about-text h3 {
    font-family: var(--font-heading);
    font-size: var(--font-size-3xl);
    margin-bottom: 2rem;
    color: var(--luxury-accent);
    font-weight: 500;
    letter-spacing: var(--tracking-normal);
    line-height: var(--leading-snug);
}

.about-text p {
    font-size: var(--font-size-lg);
    line-height: var(--leading-loose);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    letter-spacing: var(--tracking-normal);
    font-weight: 400;
}

.education {
    background: var(--secondary-bg);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid var(--luxury-accent);
}

.education h4 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: var(--font-size-xl);
    font-weight: 600;
    letter-spacing: var(--tracking-normal);
}

.education-item {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    border-left: 3px solid var(--luxury-accent);
    background: var(--accent-bg);
    border-radius: 8px;
}

.education-item p {
    font-size: var(--font-size-base);
    line-height: var(--leading-relaxed);
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.education-item em {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-style: italic;
    line-height: var(--leading-normal);
}

.education-item:last-child {
    margin-bottom: 0;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-category {
    background: var(--secondary-bg);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    will-change: transform;
    contain: layout style paint;
}


.skill-icon {
    font-size: 3rem;
    color: var(--luxury-accent);
    margin-bottom: 1.5rem;
}

.skill-category h3 {
    font-family: var(--font-heading);
    font-size: var(--font-size-xl);
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: var(--tracking-normal);
    line-height: var(--leading-snug);
}

.skills-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.skills-list li {
    background: var(--accent-bg);
    color: var(--luxury-accent);
    padding: 0.5rem 1.2rem;
    border-radius: 25px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid var(--luxury-accent);
    transition: all 0.3s ease;
    white-space: nowrap;
    letter-spacing: var(--tracking-normal);
}

.skills-list li:hover {
    background: var(--luxury-accent);
    color: var(--primary-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: var(--secondary-bg);
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative;
    will-change: transform;
    contain: layout style paint;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(212, 175, 55, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.project-card:hover::before {
    opacity: 1;
}

.project-image {
    height: 200px;
    background: var(--accent-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-placeholder {
    font-size: 4rem;
    color: var(--luxury-accent);
    transition: all 0.3s ease;
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-family: var(--font-heading);
    font-size: var(--font-size-xl);
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: var(--tracking-normal);
    line-height: var(--leading-snug);
}

.project-content p {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: 1.5rem;
    font-size: var(--font-size-base);
    letter-spacing: var(--tracking-normal);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.2rem;
    background: var(--accent-bg);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 25px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    letter-spacing: var(--tracking-normal);
}

.project-link:hover {
    background: var(--luxury-accent);
    color: var(--primary-bg);
    transform: translateY(-2px);
}

.project-link.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.project-link.disabled:hover {
    background: var(--accent-bg);
    color: var(--text-primary);
    transform: none;
}

/* Social Media Section */
.social-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.social-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    justify-items: center;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    min-width: 140px;
    will-change: transform;
    contain: layout style paint;
}

.social-link:hover {
    transform: translateY(-8px);
    border-color: var(--luxury-accent);
}

.social-link:focus-visible {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px var(--shadow-color);
    border-color: var(--luxury-accent);
    outline: 2px solid var(--luxury-accent);
    outline-offset: 2px;
}

.social-link i {
    font-size: 2.5rem;
    color: var(--luxury-accent);
    transition: all 0.3s ease;
}

.social-link:hover i {
    color: var(--neon-accent);
    transform: scale(1.1);
}

.social-link span {
    font-weight: 500;
    font-size: var(--font-size-base);
    letter-spacing: var(--tracking-normal);
}

/* Specific social media colors on hover */
.social-link:hover:nth-child(1) i { color: #0077b5; } /* LinkedIn */
.social-link:hover:nth-child(2) i { color: #ffffff; } /* GitHub */
.social-link:hover:nth-child(3) i { color: #e4405f; } /* Instagram */
.social-link:hover:nth-child(4) i { color: #1877f2; } /* Facebook */

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        padding: 1rem 5%;
    }

    .nav-content {
        flex-wrap: nowrap;
        gap: 1rem;
    }

    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
        background: var(--secondary-bg);
        border: 1px solid var(--border-color);
        border-radius: 4px;
    }

    .hamburger:hover {
        background: var(--accent-bg);
    }

    .nav-cv-button {
        padding: 0.6rem 1.2rem;
        font-size: var(--font-size-xs);
        letter-spacing: var(--tracking-normal);
    }

    .nav-right {
        gap: 0.5rem;
    }

    .section {
        padding: 4rem 5%;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
        line-height: var(--leading-tight);
        letter-spacing: var(--tracking-tight);
    }

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

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .project-card {
        margin: 0 auto;
        max-width: 400px;
    }

    .project-links {
        flex-direction: column;
        gap: 0.8rem;
    }

    .project-link {
        justify-content: center;
        text-align: center;
    }

    .social-links {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 1rem;
        justify-items: center;
    }

    .social-link {
        padding: 1.5rem;
        min-width: 120px;
        width: 100%;
        max-width: 160px;
    }

    .social-link i {
        font-size: 2rem;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .contact {
        padding: 2rem;
    }
}

/* Enhanced Mobile Performance & Touch Optimization */
@media (max-width: 768px) {
    /* Touch-friendly interactions */
    .hamburger,
    .nav-cv-button,
    .cta-button,
    .project-link,
    .social-link {
        -webkit-tap-highlight-color: transparent;
        min-height: 44px; /* Apple's recommended minimum touch target */
    }

    /* Hardware acceleration for smoother scrolling */
    .nav,
    .project-card,
    .skill-category {
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
        will-change: transform;
    }

    /* Improve backdrop blur performance */
    .nav {
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
    }

    /* Reduce animations on mobile for better performance */
    .skill-category:hover,
    .project-card:hover,
    .social-link:hover {
        transform: none;
    }

    /* Optimize text rendering */
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-rendering: optimizeLegibility;
    }

    /* Enhanced focus states for keyboard navigation */
    .hamburger:focus,
    .nav-cv-button:focus,
    .cta-button:focus,
    .project-link:focus,
    .social-link:focus {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
        border-radius: var(--border-radius);
    }

    /* Improve readability on smaller screens */
    .hero-content {
        padding: 0 1rem;
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
        margin-bottom: 2rem;
    }

    .about-text p {
        font-size: var(--font-size-base);
        line-height: var(--leading-relaxed);
    }

    .section-title {
        margin-bottom: 3rem;
    }

    /* Optimize grid layouts for mobile */
    .skills-grid {
        gap: 1.5rem;
    }

    .skill-category {
        padding: 1.5rem;
        margin-bottom: 0;
    }

    /* Ensure proper transform for project cards */
    .project-card {
        transform: none;
        will-change: auto;
    }
}

/* High DPI displays optimization */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .profile-photo {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Parallax Effect */
.parallax {
    transform: translateY(0);
    transition: transform 0.1s ease-out;
}