:root {
    /* Minimalist Black & White Palette */
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-card: #ffffff;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-muted: #999999;
    --accent: #000000;
    --border-light: #e5e5e5;
    --border-medium: #d1d1d1;
    --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-medium: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-heavy: 0 8px 40px rgba(0, 0, 0, 0.12);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', serif;
    
    /* Spacing */
    --section-padding: 120px 0;
    --container-padding: 0 2rem;
    --gap-xs: 0.5rem;
    --gap-sm: 1rem;
    --gap-md: 1.5rem;
    --gap-lg: 2rem;
    --gap-xl: 3rem;
    
    /* Effects */
    --transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0.0, 0.2, 1);
    --border-radius: 8px;
    --border-radius-lg: 16px;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

section {
    padding: var(--section-padding);
}

/* Typography */
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--gap-xl);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -12px;
    width: 60px;
    height: 2px;
    background: var(--text-primary);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-light);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    gap: var(--gap-xl);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 1px;
    background: var(--text-primary);
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--gap-xl);
    align-items: center;
}

.hero-text h1 {
    font-family: var(--font-display);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--gap-md);
}

.hero-text .subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: var(--gap-lg);
    letter-spacing: 0.01em;
}

.hero-text .description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--gap-xl);
    line-height: 1.7;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--gap-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border: 2px solid var(--text-primary);
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--text-primary);
    transition: var(--transition-slow);
    z-index: -1;
}

.btn:hover::before {
    left: 0;
}

.btn:hover {
    color: var(--bg-primary);
}

.btn-secondary {
    border: 2px solid var(--text-primary);
    color: var(--text-primary);
}

.btn-secondary::before {
    background: var(--text-primary);
}

.btn i {
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

/* Avatar */
.avatar-container {
    display: flex;
    justify-content: center;
    position: relative;
    width: 380px;
    height: 450px;
    margin: 0 auto;
    padding: 10px;
}

.avatar-container::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    z-index: 2;
    pointer-events: none;
    transition: var(--transition-slow);
}

.avatar-container::after {
    content: '';
    position: absolute;
    inset: -5px;
    background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.1) 50%, transparent 60%);
    border-radius: 15px;
    z-index: 3;
    pointer-events: none;
    opacity: 0;
    transition: all 0.5s ease;
}

.avatar-container:hover::after {
    opacity: 1;
    animation: glassShine 1.5s infinite alternate;
}

@keyframes glassShine {
    0% {
        background-position: -100px;
    }
    100% {
        background-position: 500px;
    }
}

.avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    transition: var(--transition-slow);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
    position: relative;
    z-index: 1;
    filter: contrast(1.05);
}

.avatar:hover {
    transform: scale(1.02) translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.18);
    filter: contrast(1.08) brightness(1.03);
}

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--gap-xl);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--gap-lg);
    margin-top: var(--gap-xl);
}

.stat-item {
    text-align: center;
    padding: var(--gap-lg);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.stat-label {
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--gap-xl);
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

.skill-category {
    background: var(--bg-card);
    padding: var(--gap-xl) var(--gap-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    min-height: 300px;
    display: flex;
    flex-direction: column;
}

.skill-category:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-5px);
    border-color: var(--text-secondary);
}

.skill-category:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(to bottom, #000, #555);
    opacity: 0;
    transition: var(--transition);
}

.skill-category:hover:before {
    opacity: 1;
}

.skill-category h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--gap-lg);
    color: var(--text-primary);
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.skill-category h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--text-primary);
    opacity: 0.5;
    transition: var(--transition);
}

.skill-category:hover h3:after {
    width: 100px;
    opacity: 1;
}

.skill-list {
    list-style: none;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.skill-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1.1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    letter-spacing: 0.5px;
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-list li:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
    font-weight: 600;
}

/* Projects Section */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--gap-xl);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    transition: var(--transition-slow);
    overflow: hidden;
}

.project-card:hover {
    box-shadow: var(--shadow-heavy);
    transform: translateY(-8px);
}

.project-image {
    height: 240px;
    overflow: hidden;
    position: relative;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--gap-md);
    opacity: 0;
    transition: var(--transition);
}

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

.project-overlay .btn {
    border-color: white;
    color: white;
    padding: 0.75rem 1.5rem;
    font-size: 0.8rem;
}

.project-overlay .btn::before {
    background: white;
}

.project-overlay .btn:hover {
    color: var(--text-primary);
}

.project-content {
    padding: var(--gap-lg);
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--gap-sm);
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--gap-md);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--gap-xs);
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--border-medium);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--gap-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--gap-lg);
    color: var(--text-primary);
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--gap-xl);
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--gap-lg);
    padding-bottom: var(--gap-md);
    border-bottom: 1px solid var(--border-light);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item i {
    width: 24px;
    margin-right: var(--gap-md);
    color: var(--text-primary);
}

.contact-item a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    opacity: 0.7;
}

.social-links {
    display: flex;
    gap: var(--gap-md);
    margin-top: var(--gap-xl);
}

.social-link {
    width: 48px;
    height: 48px;
    border: 1px solid var(--border-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    padding: var(--gap-xl);
    border: 1px solid var(--border-light);
}

.form-group {
    margin-bottom: var(--gap-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--gap-xs);
    font-weight: 500;
    color: var(--text-primary);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-light);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-primary);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-light);
    padding: var(--gap-xl) 0;
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
        --container-padding: 0 1rem;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--gap-lg);
    }

    .hero-content > div:first-child {
        order: 2;
    }

    .avatar-container {
        width: 320px;
        height: 400px;
    }
    
    .avatar {
        width: 100%;
        height: 100%;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.8rem;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--gap-md);
    }
}

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

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

    .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* Smooth scrolling for anchor links */
html {
    scroll-padding-top: 100px;
}

/* Custom selection */
::selection {
    background: var(--text-primary);
    color: var(--bg-primary);
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

/* Floating Social Links */
.floating-social {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    gap: 8px;
}

.floating-social-link {
    width: 50px;
    height: 60px;
    background-color: var(--text-primary);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    transform: translateX(-40px);
    border-radius: 0 10px 10px 0;
    margin-bottom: 0;
    box-shadow: var(--shadow-medium);
}

.floating-social-link:hover {
    transform: translateX(0);
    width: 140px;
}

.floating-social-link .link-text {
    position: absolute;
    right: 15px;
    opacity: 0;
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity 0.3s ease;
    letter-spacing: 0.5px;
}

.floating-social-link:hover .link-text {
    opacity: 1;
}

.floating-social-link i {
    transition: var(--transition);
    position: absolute;
    left: 18px;
}

.floating-social-link:hover i {
    transform: scale(1.2);
}

/* Loading Modal Styles */
.loading-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    color: #fff;
    text-align: center;
}

.loading-content {
    background-color: rgba(0, 0, 0, 0.9);
    padding: 30px;
    border-radius: 10px;
    max-width: 90%;
    width: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1.2rem;
    margin: 15px 0;
    max-width: 100%;
}

.loading-text h3 {
    margin-bottom: 10px;
    font-size: 1.6rem;
}

.loading-text p {
    margin-bottom: 8px;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.close-modal {
    margin-top: 20px;
    padding: 8px 20px;
    background-color: #fff;
    color: #000;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.close-modal:hover {
    background-color: #eee;
    transform: translateY(-2px);
}