/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
    /* Colors - Light Mode */
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --accent: #06b6d4;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
    --gradient-hero: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    
    /* Spacing */
    --container-width: 1200px;
    --section-padding: 6rem 0;
    
    /* Typography */
    --font-display: 'JetBrains Mono', monospace;
    --font-body: 'Manrope', sans-serif;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    
    --border-color: #334155;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    
    --gradient-hero: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

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

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

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-switcher:hover {
    border-color: var(--primary);
}

.lang-option {
    color: var(--text-tertiary);
    transition: color 0.3s ease;
}

.lang-option.active {
    color: var(--primary);
    font-weight: 600;
}

.lang-divider {
    color: var(--border-color);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

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

.sun-icon,
.moon-icon {
    color: var(--text-primary);
    transition: all 0.3s ease;
}

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

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

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

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

.nav-link-cta {
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 5rem;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -10%;
    right: -10%;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    bottom: -10%;
    left: -10%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(50px, 50px); }
    50% { transform: translate(0, 100px); }
    75% { transform: translate(-50px, 50px); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-tag {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--primary);
    background-color: rgba(37, 99, 235, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
}

.title-line {
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
}

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

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

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

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

.hero-image {
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.image-wrapper {
    position: relative;
    display: inline-block;
}

.profile-image {
    width: 100%;
    max-width: 400px;
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
}

.image-border {
    position: absolute;
    inset: -20px;
    border: 2px solid var(--primary);
    border-radius: 1rem;
    z-index: 0;
    opacity: 0.5;
}

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

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-tertiary);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--text-tertiary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

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

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(10px); }
}

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

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--primary);
    background-color: rgba(37, 99, 235, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

/* ============================================
   Bio Section
   ============================================ */
.bio-section {
    background-color: var(--bg-secondary);
}

.bio-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.bio-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.8;
}

.bio-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
}

/* ============================================
   Experience Section (Timeline)
   ============================================ */
.timeline {
    position: relative;
    padding-left: 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0.5rem;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.timeline-item {
    position: relative;
    padding-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    left: -3rem;
    top: 0.5rem;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--primary);
    z-index: 1;
}

.timeline-content {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.timeline-date {
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-company {
    color: var(--text-tertiary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-card);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.project-overlay {
    position: absolute;
    top: 1rem;
    left: 1rem;
}

.project-tag {
    display: inline-block;
    background-color: rgba(37, 99, 235, 0.9);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-display);
}

.project-content {
    padding: 2rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.tech-tag {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-display);
}

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

.skill-category {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.category-icon img {
    width: 32px;
    height: 32px;
    filter: brightness(0) invert(1);
}

.category-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-family: var(--font-display);
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.skill-list li {
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;
}

.skill-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

/* ============================================
   Education Section
   ============================================ */
.education-section {
    background-color: var(--bg-secondary);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.education-card {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--border-color);
    transition: all 0.3s ease;
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.education-card.current {
    border-left-color: var(--primary);
}

.education-card.future {
    border-left-color: var(--accent);
}

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

.period-badge {
    display: inline-block;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-display);
}

.education-card.current .period-badge {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.education-card.future .period-badge {
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--accent);
}

.period-badge.completed {
    background-color: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

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

.education-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.education-institution {
    color: var(--text-tertiary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.education-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   Recommendations Section
   ============================================ */
.recommendations-intro {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.recommendation-card {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.recommendation-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.demo-card {
    border: 2px dashed var(--border-color);
    opacity: 0.7;
}

.recommendation-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.recommendation-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.recommendation-icon img {
    width: 100%;
    height: 100%;
}

.recommendation-badge {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-display);
}

.recommendation-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.recommendation-category {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.recommendation-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.recommendation-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.recommendation-platform {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-family: var(--font-display);
}

.recommendation-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
}

.recommendation-link:hover {
    text-decoration: underline;
}

.recommendations-note {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
}

.recommendations-note p {
    color: var(--text-secondary);
    font-size: 1rem;
}

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

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-text {
    text-align: center;
    margin-bottom: 3rem;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.8;
}

.contact-buttons {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background-color: var(--bg-card);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.contact-btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.btn-icon {
    width: 50px;
    height: 50px;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.email-btn .btn-icon {
    background: linear-gradient(135deg, #ea4335 0%, #d33a2c 100%);
}

.linkedin-btn .btn-icon {
    background: linear-gradient(135deg, #0077b5 0%, #005885 100%);
}

.github-btn .btn-icon {
    background: linear-gradient(135deg, #333 0%, #000 100%);
}

.btn-icon img {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(1);
}

.btn-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
}

.btn-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-weight: 600;
}

.btn-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 700;
    font-family: var(--font-display);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

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

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

.footer-social a {
    width: 40px;
    height: 40px;
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

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

.footer-social img {
    width: 20px;
    height: 20px;
    filter: brightness(0) saturate(100%) invert(50%);
}

.footer-social a:hover img {
    filter: brightness(0) invert(1);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-image {
        order: -1;
        text-align: center;
    }
    
    .bio-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-controls {
        order: 3;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all 0.3s ease;
    }
    
    .nav-links.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        margin-bottom: 3rem;
    }
    
    .scroll-indicator {
        display: none;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .timeline {
        padding-left: 2rem;
    }
    
    .timeline-dot {
        left: -2rem;
    }
    
    .projects-grid,
    .skills-grid,
    .education-grid,
    .recommendations-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
}