/* ==========================================
   CSS Variables & Root Styles
   ========================================== */
:root {
    /* Color Palette */
    --primary-color: #00d4ff;
    --primary-dark: #0094cc;
    --secondary-color: #ff6b35;
    --accent-color: #00ff88;
    --background-dark: #0a0a0f;
    --background-light: #1a1a2e;
    --background-card: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #8892b0;
    --border-color: #233554;
    --success-color: #00ff88;
    --warning-color: #ffa726;
    --error-color: #ff5252;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

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

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: var(--background-dark);
}

/* ==========================================
   Loading Screen
   ========================================== */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--background-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
}

.code-typing {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--primary-color);
}

.typing-text {
    opacity: 0;
    animation: typeIn 2s ease-in-out forwards;
}

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

@keyframes typeIn {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 1; }
}

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

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.98);
    border-bottom-color: var(--border-color);
    box-shadow: var(--shadow-md);
}

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

.nav-logo a {
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.logo-text {
    color: var(--text-primary);
}

.logo-accent {
    color: var(--primary-color);
}

.nav-logo a:hover .logo-text {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

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

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 3px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}

.nav-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ==========================================
   Typography & Utilities
   ========================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--background-dark);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--background-dark);
    transform: translateY(-2px);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        var(--background-dark);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23233554" stroke-width="0.5" opacity="0.3"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.4;
}

.hero-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 2;
}

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

.hero-text {
    animation: slideInLeft 0.8s ease-out;
}

.greeting {
    display: block;
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
}

.name {
    display: block;
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.role {
    display: block;
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Terminal Window */
.hero-visual {
    animation: slideInRight 0.8s ease-out;
}

.terminal-window {
    background: var(--background-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.terminal-header {
    background: var(--background-light);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.terminal-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.terminal-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.btn-close {
    background: #ff5f57;
}

.btn-minimize {
    background: #ffbd2e;
}

.btn-maximize {
    background: #28ca42;
}

.terminal-title {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.terminal-body {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    min-height: 200px;
}

.terminal-line {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.prompt {
    color: var(--accent-color);
    font-weight: 600;
}

.command {
    color: var(--primary-color);
}

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

.terminal-output {
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
    white-space: pre-line;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    color: var(--primary-color);
    font-size: 1.5rem;
}

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

/* ==========================================
   About Section
   ========================================== */
.about {
    padding: var(--spacing-xxl) 0;
    background: var(--background-light);
}

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

.about-intro {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.about-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
}

.detail-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
    width: 20px;
}

.expertise-areas h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
}

.expertise-list {
    list-style: none;
    display: grid;
    gap: var(--spacing-sm);
}

.expertise-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.expertise-list li:hover {
    background: var(--background-card);
    transform: translateX(5px);
}

.expertise-list i {
    color: var(--primary-color);
    font-size: 1.1rem;
    width: 20px;
}

/* Stats */
.about-stats {
    display: grid;
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--background-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==========================================
   Experience Section
   ========================================== */
.experience {
    padding: var(--spacing-xxl) 0;
    background: var(--background-dark);
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-left: 80px;
}

.timeline-dot {
    position: absolute;
    left: 21px;
    top: 0;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--background-dark), 0 0 0 6px var(--border-color);
}

.timeline-content {
    background: var(--background-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.timeline-date {
    color: var(--primary-color);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.timeline-title {
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.timeline-description {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.timeline-projects {
    margin-bottom: var(--spacing-md);
}

.timeline-projects h5 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.timeline-projects ul {
    list-style: none;
    padding-left: var(--spacing-md);
}

.timeline-projects li {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    position: relative;
}

.timeline-projects li::before {
    content: '→';
    color: var(--primary-color);
    position: absolute;
    left: -var(--spacing-md);
}

.timeline-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

/* ==========================================
   Skills Section
   ========================================== */
.skills {
    padding: var(--spacing-xxl) 0;
    background: var(--background-light);
}

.skills-content {
    display: grid;
    gap: var(--spacing-xl);
}

.skills-category {
    background: var(--background-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.skills-category:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.category-title i {
    color: var(--primary-color);
    font-size: 1.3rem;
}

.skills-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.skill-item {
    padding: var(--spacing-md);
    background: var(--background-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.skill-name {
    color: var(--text-primary);
    font-weight: 600;
}

.skill-experience {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

.skill-bar {
    height: 6px;
    background: var(--background-dark);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-sm);
    width: 0;
    transition: width 1s ease-out 0.3s;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* ==========================================
   Projects Section
   ========================================== */
.projects {
    padding: var(--spacing-xxl) 0;
    background: var(--background-dark);
}

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

.github-profile {
    background: var(--background-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.github-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    border: 3px solid var(--primary-color);
}

.github-name {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.github-bio {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.github-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.github-stat {
    text-align: center;
}

.github-stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.github-stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.github-repos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.repo-card {
    background: var(--background-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.repo-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.repo-name {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.repo-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.repo-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.repo-language {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.language-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
    padding: var(--spacing-xxl) 0;
    background: var(--background-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.contact-methods {
    display: grid;
    gap: var(--spacing-md);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background-card);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.contact-method:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.contact-method i {
    color: var(--primary-color);
    font-size: 1.3rem;
    width: 25px;
    text-align: center;
}

.method-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.method-value {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
}

/* Contact Form */
.contact-form {
    background: var(--background-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--background-dark);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    text-align: center;
}

.footer-text p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--background-card);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    text-decoration: none;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--primary-color);
    color: var(--background-dark);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* ==========================================
   Back to Top Button
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--background-dark);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ==========================================
   Animations
   ========================================== */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Scroll-triggered animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .timeline-item {
        padding-left: 60px;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-dot {
        left: 11px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--background-dark);
        width: 100%;
        text-align: center;
        transition: all var(--transition-normal);
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--border-color);
        padding: var(--spacing-lg) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding-top: 100px;
    }
    
    .name {
        font-size: 2.5rem !important;
    }
    
    .role {
        font-size: 1.5rem !important;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .timeline {
        padding-left: 0;
    }
    
    .timeline::before {
        left: 15px;
    }
    
    .timeline-item {
        padding-left: 50px;
    }
    
    .timeline-dot {
        left: 6px;
        width: 18px;
        height: 18px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .github-repos {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-links {
        order: -1;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .name {
        font-size: 2rem !important;
    }
    
    .role {
        font-size: 1.2rem !important;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    .navbar,
    .back-to-top,
    .scroll-indicator,
    .contact-form {
        display: none !important;
    }
    
    .hero {
        min-height: 50vh;
        padding: var(--spacing-lg) 0;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .section-title {
        color: black !important;
    }
}

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

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #ffffff;
        --text-secondary: #e0e0e0;
        --background-dark: #000000;
        --background-light: #1a1a1a;
        --border-color: #ffffff;
    }
}