/* ===================================
   Root Variables & Reset
   =================================== */

:root {
    /* Light theme colors */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f1f3f5;
    --color-text: #212529;
    --color-text-secondary: #495057;
    --color-text-tertiary: #6c757d;
    --color-primary: #4263eb;
    --color-primary-hover: #364fc7;
    --color-secondary: #22c55e;
    --color-accent: #f59e0b;
    --color-border: #e9ecef;
    --color-card-bg: #ffffff;
    --color-code-bg: #1e1e1e;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
}

/* Dark theme */
[data-theme="dark"] {
    --color-bg: #0f0f10;
    --color-bg-secondary: #1a1a1c;
    --color-bg-tertiary: #252528;
    --color-text: #f1f3f5;
    --color-text-secondary: #ced4da;
    --color-text-tertiary: #868e96;
    --color-primary: #5c7cfa;
    --color-primary-hover: #748ffc;
    --color-secondary: #51cf66;
    --color-accent: #ffd43b;
    --color-border: #2a2a2d;
    --color-card-bg: #1a1a1c;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5);
}

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

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

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

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(2rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 1.875rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ===================================
   Utilities
   =================================== */

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

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

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   Navigation
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-bg);
    backdrop-filter: blur(10px);
    background: rgba(var(--color-bg), 0.9);
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-base);
    border-bottom: 1px solid var(--color-border);
}

.navbar.scrolled {
    padding: 0.75rem 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
}

.logo-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
}

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

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--color-primary);
    color: white;
    transform: rotate(180deg);
}

.theme-icon-sun {
    display: none;
}

[data-theme="dark"] .theme-icon-moon {
    display: none;
}

[data-theme="dark"] .theme-icon-sun {
    display: block;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    position: relative;
}

.hamburger {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    position: relative;
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--color-text);
    transition: all var(--transition-base);
}

.hamburger::before {
    transform: translateY(-8px);
}

.hamburger::after {
    transform: translateY(8px);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 25% 25%, rgba(66, 99, 235, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 75% 75%, rgba(34, 197, 94, 0.1) 0%, transparent 50%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: calc(100vh - 160px);
}

.hero-greeting {
    color: var(--color-text-tertiary);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    display: block;
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    margin-bottom: 1rem;
    animation: fadeInUp 0.7s ease;
}

.hero-name {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-role {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.role-separator {
    color: var(--color-primary);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    animation: fadeInUp 0.9s ease;
}

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

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease;
}

.hero-social {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1.1s ease;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Code Window */
.hero-visual {
    animation: fadeInRight 1s ease;
}

.code-window {
    background: var(--color-code-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transform: perspective(1000px) rotateY(-5deg);
    transition: transform var(--transition-base);
}

.code-window:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.code-header {
    background: #2d2d2d;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.code-dots {
    display: flex;
    gap: 0.5rem;
}

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

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.code-title {
    margin-left: auto;
    color: #8b8b8b;
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

.code-content {
    padding: 1.5rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: #d4d4d4;
}

.code-content .keyword {
    color: #c586c0;
}

.code-content .string {
    color: #ce9178;
}

.code-content .function {
    color: #dcdcaa;
}

.code-content .type {
    color: #4ec9b0;
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-tertiary);
    transition: color var(--transition-base);
}

.scroll-indicator:hover {
    color: var(--color-primary);
}

/* ===================================
   About Section
   =================================== */

.about {
    padding: var(--space-2xl) 0;
    background: var(--color-bg-secondary);
}

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

.section-title {
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-bio {
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-highlights {
    display: grid;
    gap: 1.5rem;
    margin-top: 2rem;
}

.highlight-item {
    display: flex;
    gap: 1rem;
    align-items: start;
    padding: 1rem;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.highlight-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.highlight-item i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.highlight-item h4 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.highlight-item p {
    margin: 0;
    font-size: 0.875rem;
}

.skills-title {
    margin-bottom: 1.5rem;
}

.skills-grid {
    display: grid;
    gap: 1.5rem;
}

.skill-category {
    background: var(--color-bg);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.skill-category:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.skill-category h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.skill-category i {
    margin-right: 0.5rem;
    color: var(--color-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: var(--color-primary);
    color: white;
}

/* ===================================
   Projects Section
   =================================== */

.projects {
    padding: var(--space-2xl) 0;
    background: var(--color-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

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

.project-card.featured {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(66, 99, 235, 0.05), rgba(34, 197, 94, 0.05));
}

.project-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.project-icon {
    font-size: 2rem;
    color: var(--color-primary);
}

.project-links {
    display: flex;
    gap: 0.75rem;
}

.project-link {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.project-link:hover {
    background: var(--color-primary);
    color: white;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.project-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.tech-tag {
    padding: 0.25rem 0.625rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.project-stats {
    display: flex;
    gap: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.stat i {
    color: var(--color-primary);
}

/* ===================================
   Experience Section
   =================================== */

.experience {
    padding: var(--space-2xl) 0;
    background: var(--color-bg-secondary);
    position: relative;
    overflow: visible;
}

.timeline {
    position: relative;
    padding-left: 2rem;
    min-height: 100px;
}

/* Visual timeline line */
.timeline-line {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-primary);
    background: linear-gradient(180deg, 
        var(--color-primary) 0%, 
        var(--color-primary) 30%,
        var(--color-secondary) 70%,
        var(--color-secondary) 100%);
    border-radius: 2px;
    animation: timelineGlow 3s ease-in-out infinite;
}

@keyframes timelineGlow {
    0%, 100% { box-shadow: 0 0 5px rgba(66, 99, 235, 0.5); }
    50% { box-shadow: 0 0 20px rgba(66, 99, 235, 0.8), 0 0 30px rgba(34, 197, 94, 0.5); }
}

/* Additional decorative line using pseudo-element */
.timeline::before {
    content: '';
    position: absolute;
    left: -1px;
    top: -20px;
    bottom: -20px;
    width: 5px;
    background: linear-gradient(180deg, 
        transparent 0%,
        rgba(66, 99, 235, 0.3) 10%,
        rgba(66, 99, 235, 0.5) 50%,
        rgba(34, 197, 94, 0.5) 50%,
        rgba(34, 197, 94, 0.3) 90%,
        transparent 100%);
    z-index: 0;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    animation: fadeInLeft 0.6s ease;
    padding-bottom: 1rem;
    min-height: 150px;
}

.timeline-marker {
    position: absolute;
    left: -7px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid var(--color-bg-secondary);
    box-shadow: 0 0 0 2px var(--color-primary), 0 0 20px rgba(66, 99, 235, 0.4);
    transition: all var(--transition-base);
    z-index: 3;
}

.timeline-item:hover .timeline-marker {
    transform: scale(1.5);
    box-shadow: 0 0 0 3px var(--color-primary), 0 0 30px rgba(66, 99, 235, 0.8);
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1.5); }
    50% { transform: scale(1.7); }
}

.timeline-content {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    margin-left: 1rem;
}

.timeline-content:hover {
    box-shadow: var(--shadow-xl);
    transform: translateX(5px);
}

.timeline-header {
    margin-bottom: 1rem;
}

.timeline-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.timeline-company {
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.timeline-company i {
    margin-right: 0.5rem;
    color: var(--color-primary);
}

.timeline-date {
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
}

.timeline-date i {
    margin-right: 0.5rem;
}

.timeline-list {
    list-style: none;
    margin: 1rem 0;
}

.timeline-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.timeline-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--color-text);
}

/* ===================================
   Contact Section
   =================================== */

.contact {
    padding: var(--space-2xl) 0;
    background: var(--color-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-heading {
    margin-bottom: 1rem;
}

.contact-text {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.contact-details {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.contact-item i {
    width: 40px;
    height: 40px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.125rem;
}

.contact-item h4 {
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    color: var(--color-text-tertiary);
}

.contact-item a {
    color: var(--color-text);
    font-weight: 500;
}

.contact-social h4 {
    margin-bottom: 1rem;
}

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

.social-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: all var(--transition-base);
}

.social-button:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-form {
    background: var(--color-bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-lg);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(66, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    width: 100%;
    justify-content: center;
}

/* ===================================
   Footer
   =================================== */

.footer {
    padding: var(--space-lg) 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text {
    color: var(--color-text-secondary);
}

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

.footer-links a {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: all var(--transition-base);
}

.footer-links a:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .hero-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background: var(--color-bg);
        width: 100%;
        text-align: center;
        transition: left var(--transition-base);
        box-shadow: var(--shadow-xl);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-content {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .code-window {
        transform: none;
    }
    
    .timeline {
        padding-left: 1rem;
    }
    
    .timeline-marker {
        left: -1.5rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        display: none;
    }
    
    .timeline {
        padding-left: 0;
    }
    
    .timeline-marker {
        display: none;
    }
    
    .social-links {
        flex-direction: column;
    }
    
    .social-button {
        width: 100%;
        justify-content: center;
    }
}

/* ===================================
   Loading & Transitions
   =================================== */

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-slow);
}

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

/* Smooth scroll for sections */
section {
    scroll-margin-top: 80px;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

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

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

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

/* Focus visible for accessibility */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}