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

:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 1.875rem;
    --font-4xl: 2.25rem;
    --font-5xl: 3rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;
}

body.dark-mode {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --accent-primary: #818cf8;
    --accent-secondary: #a78bfa;
    --accent-gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
    --border-primary: #334155;
    --border-secondary: #475569;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-primary);
    transition: all var(--transition-normal);
}

body.dark-mode .navbar {
    background-color: rgba(15, 23, 42, 0.8);
    border-bottom-color: var(--border-primary);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: var(--font-xl);
    color: var(--text-primary);
    text-decoration: none;
}

.brand-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.brand-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-gradient);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-sm);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--accent-primary);
    background-color: var(--bg-secondary);
}

.nav-link.active {
    color: var(--accent-primary);
    background-color: var(--bg-secondary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--bg-primary);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-normal);
    z-index: 999;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-content {
    padding: var(--space-8) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-20);
}

.mobile-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-lg);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
    color: var(--accent-primary);
    background-color: var(--bg-secondary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: var(--bg-primary);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

.orb-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, #ec4899, #6366f1);
    bottom: 10%;
    left: 50%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-20);
    align-items: center;
    z-index: 1;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.hero-intro {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.greeting {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-name {
    font-size: var(--font-5xl);
    font-weight: 800;
    line-height: 1;
    margin: 0;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.cursor-blink {
    animation: blink 1s infinite;
    color: var(--accent-primary);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-title-container {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-2xl);
    font-weight: 600;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: var(--space-4) auto 0;
    line-height: 1.6;
}

.dynamic-text {
    height: 1.2em;
    overflow: hidden;
    position: relative;
}

.text-slide {
    position: absolute;
    top: 0;
    left: 0;
    animation: slideText 9s infinite;
    opacity: 0;
}

.text-slide:nth-child(1) { animation-delay: 0s; }
.text-slide:nth-child(2) { animation-delay: 3s; }
.text-slide:nth-child(3) { animation-delay: 6s; }

@keyframes slideText {
    0%, 30% { opacity: 1; transform: translateY(0); }
    33%, 100% { opacity: 0; transform: translateY(-20px); }
}

.hero-profile {
    display: flex;
    justify-content: center;
}

.profile-container {
    position: relative;
}

.profile-border {
    position: relative;
    width: 280px;
    height: 280px;
    border-radius: var(--radius-2xl);
    background: var(--accent-gradient);
    padding: 4px;
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-normal);
}

.profile-border:hover {
    transform: scale(1.05);
}

.profile-img {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-2xl);
    object-fit: cover;
    border: 4px solid var(--bg-primary);
}

.profile-status {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 20px;
    height: 20px;
    background: #10b981;
    border: 3px solid var(--bg-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.info-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-secondary);
    font-size: var(--font-base);
}

.info-item i {
    color: var(--accent-primary);
    width: 20px;
    text-align: center;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-base);
    text-decoration: none;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-tertiary);
    font-size: var(--font-sm);
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border-right: 2px solid var(--text-tertiary);
    border-bottom: 2px solid var(--text-tertiary);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) rotate(45deg); }
    40% { transform: translateY(-10px) rotate(45deg); }
    60% { transform: translateY(-5px) rotate(45deg); }
}

/* Section Styles */
section {
    padding: var(--space-20) 0;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-label {
    display: inline-block;
    background: var(--accent-gradient);
    color: white;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--font-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-description {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.project-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-primary);
}

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

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.project-link {
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.project-link:hover {
    transform: scale(1.05);
}

.project-content {
    padding: var(--space-6);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.project-category {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-title {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-5);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tech-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--font-xs);
    font-weight: 500;
    border: 1px solid var(--border-primary);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

.education-card, .experience-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
    display: flex;
    gap: var(--space-6);
    transition: all var(--transition-normal);
}

.education-card:hover, .experience-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-xl);
    flex-shrink: 0;
}

.card-content {
    flex: 1;
}

.card-content h3 {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.card-subtitle {
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.card-detail, .card-period {
    color: var(--text-secondary);
    font-size: var(--font-sm);
    margin-bottom: var(--space-1);
}

.card-location {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-tertiary);
    font-size: var(--font-sm);
    margin-top: var(--space-4);
}

.achievement-list {
    list-style: none;
    margin-top: var(--space-4);
}

.achievement-list li {
    position: relative;
    padding-left: var(--space-6);
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
}

.achievement-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

.skills-section, .achievements-section {
    margin-bottom: var(--space-16);
}

.skills-title, .achievements-title {
    font-size: var(--font-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-12);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.skill-category h4 {
    font-size: var(--font-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--border-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.skill-tags span {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    font-weight: 500;
    border: 1px solid var(--border-primary);
    transition: all var(--transition-fast);
}

.skill-tags span:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-2px);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.achievement-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
    text-align: center;
    transition: all var(--transition-normal);
}

.achievement-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.achievement-card.patent-highlight {
    border-color: var(--accent-secondary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, var(--bg-primary) 100%);
}

.achievement-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-lg);
    margin: 0 auto var(--space-4);
}

.achievement-card h4 {
    font-size: var(--font-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.achievement-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.achievement-id {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    font-family: var(--font-mono);
}

/* Contact Section */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-12);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    width: 100%;
}

.contact-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-normal);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-lg);
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: var(--font-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.contact-details p {
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-link {
    width: 50px;
    height: 50px;
    background: var(--bg-primary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-xl);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-gradient);
    border-color: var(--accent-primary);
    color: white;
    transform: translateY(-4px);
}

/* Footer */
.footer {
    background: var(--bg-tertiary);
    padding: var(--space-12) 0;
    text-align: center;
    border-top: 1px solid var(--border-primary);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.footer p {
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }
    
    .hero-name {
        font-size: var(--font-4xl);
    }
    
    .profile-border {
        width: 200px;
        height: 200px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: var(--font-3xl);
    }
    
    .hero-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 var(--space-4);
    }
    
    .section-container {
        padding: 0 var(--space-4);
    }
    
    .hero-name {
        font-size: var(--font-3xl);
    }
    
    .profile-border {
        width: 180px;
        height: 180px;
    }
    
    .mobile-menu {
        width: 100%;
        right: -100%;
    }
    
    .mobile-menu.active {
        right: 0;
    }
}