/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    /* Colors - Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent-primary: #0066ff;
    --accent-secondary: #00d4ff;
    --accent-gradient: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
}

/* Dark Theme */
body.dark-theme {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --shadow: rgba(255, 255, 255, 0.1);
    --shadow-lg: rgba(255, 255, 255, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

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-base), color var(--transition-base);
}

/* ============================================
   Skip to Content Link (Accessibility)
   ============================================ */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--accent-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    font-weight: 600;
    z-index: 10001;
    border-radius: 0 0 var(--radius-sm) 0;
    transition: top 0.3s ease;
}

.skip-to-content:focus {
    top: 0;
    outline: 3px solid var(--accent-secondary);
    outline-offset: 2px;
}

/* ============================================
   Loading Screen
   ============================================ */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

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

.loader {
    text-align: center;
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 4px solid var(--bg-tertiary);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.loader-text {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   Scroll to Top Button
   ============================================ */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-image {
    height: 40px;
    width: auto;
    transition: transform var(--transition-fast), filter var(--transition-fast);
}

/* Light theme - dark logo */
body:not(.dark-theme) .logo-image {
    filter: brightness(0.2);
}

/* Dark theme - white logo */
body.dark-theme .logo-image {
    filter: brightness(0) invert(1);
}

.logo-image:hover {
    transform: scale(1.05);
}

body:not(.dark-theme) .logo-image:hover {
    filter: brightness(0.2) drop-shadow(0 0 8px rgba(0, 102, 255, 0.4));
}

body.dark-theme .logo-image:hover {
    filter: brightness(0) invert(1) drop-shadow(0 0 8px rgba(255, 255, 255, 0.4));
}

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

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

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

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

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

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

.language-toggle {
    background: var(--bg-tertiary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.language-toggle:hover {
    transform: scale(1.05);
    background: var(--accent-primary);
    color: white;
}

.lang-text {
    font-size: 0.9rem;
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 6rem 2rem 4rem;
    background: var(--bg-primary);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    min-height: 2.5rem;
}

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

.cursor {
    display: inline-block;
    width: 3px;
    background: var(--accent-primary);
    animation: blink 1s infinite;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 102, 255, 0.4);
}

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

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

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

.social-link {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1.2rem;
    text-decoration: none;
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-3px);
}

.hero-image {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-card {
    position: absolute;
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.floating-card:nth-child(1) {
    top: 10%;
    left: 10%;
}

.floating-card:nth-child(2) {
    top: 50%;
    right: 10%;
}

.floating-card:nth-child(3) {
    bottom: 10%;
    left: 20%;
}

.delay-1 {
    animation-delay: 1s;
}

.delay-2 {
    animation-delay: 2s;
}

.card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.card-content i {
    font-size: 2rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-content h3 {
    font-size: 0.9rem;
    text-align: center;
    white-space: nowrap;
}

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

.scroll-indicator a {
    color: var(--text-secondary);
    font-size: 2rem;
    text-decoration: none;
}

/* ============================================
   Sections
   ============================================ */
section {
    padding: var(--spacing-xl) 2rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

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

.section-title::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

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

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

.about-image {
    display: flex;
    justify-content: center;
}

.profile-image {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.3);
    border: 5px solid transparent;
    background: var(--accent-gradient);
    padding: 5px;
}

.image-placeholder {
    width: 300px;
    height: 300px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: white;
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.3);
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: 0 5px 15px var(--shadow);
}

.stat-item h3 {
    font-size: 2rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

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

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

.timeline-dot {
    position: absolute;
    left: -3.5rem;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--bg-primary), 0 0 0 8px var(--accent-secondary);
}

.timeline-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 20px var(--shadow);
    transition: transform var(--transition-base);
}

.timeline-content:hover {
    transform: translateY(-5px);
}

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

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

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

.tag {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.3rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ============================================
   Skills Section
   ============================================ */
.skills {
    background: var(--bg-secondary);
}

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

.skill-category {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 20px var(--shadow);
    transition: transform var(--transition-base);
}

.skill-category:hover {
    transform: translateY(-5px);
}

.category-icon {
    font-size: 3rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skill-item span {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.skill-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width 1s ease;
}

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

.education-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 20px var(--shadow);
    transition: all var(--transition-base);
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-lg);
}

.education-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin-bottom: 1.5rem;
}

.education-content h3 {
    font-size: 1.4rem;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.education-content h4 {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
}

.education-institution {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.education-date {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.education-grade {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    display: inline-block;
}

.education-content p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   Research Projects Section
   ============================================ */
.research {
    background: var(--bg-primary);
    padding: 6rem 0;
    overflow: hidden;
}

.research-carousel {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 3rem;
    padding: 0 80px;
}

.research-cards-wrapper {
    width: 100%;
    max-width: 1400px;
    overflow: hidden;
    position: relative;
}

.research-cards-container {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 2rem;
    padding: 2rem 0;
}

.research-card {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 350px;
    opacity: 0.4;
    transform: scale(0.85);
    pointer-events: none;
    filter: blur(2px);
}

.research-card.active {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.3);
    filter: blur(0);
}

.research-card.side {
    opacity: 0.6;
    transform: scale(0.9);
    pointer-events: auto;
    filter: blur(1px);
}

.research-card:hover.active {
    transform: scale(1.02);
    box-shadow: 0 25px 70px rgba(0, 102, 255, 0.4);
}

.research-logo {
    width: 100%;
    height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    border-radius: 15px;
    padding: 1.5rem;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.research-logo::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
}

.research-logo i {
    font-size: 2.5rem;
    color: white;
    z-index: 1;
}

.research-logo .logo-text {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    letter-spacing: 1px;
    z-index: 1;
}

/* Individual Project Colors */
.research-logo-biflex {
    background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
}

.research-logo-anomob {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
}

.research-logo-fleet {
    background: linear-gradient(135deg, #0984e3 0%, #74b9ff 100%);
}

.research-card h3 {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin: 0;
}

.research-subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0;
}

.research-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    flex-grow: 1;
    margin: 0;
}

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

.research-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
    transition: gap 0.3s ease;
}

.research-link:hover {
    gap: 0.75rem;
}

.research-link i {
    font-size: 0.9rem;
}

/* Carousel Navigation Buttons */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

.carousel-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.5);
}

.carousel-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.carousel-prev {
    left: 10px;
}

.carousel-next {
    right: 10px;
}

/* Carousel Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-secondary);
    opacity: 0.3;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot:hover {
    opacity: 0.6;
    transform: scale(1.2);
}

.dot.active {
    background: var(--accent-color);
    opacity: 1;
    transform: scale(1.3);
}

/* Responsive */
@media (max-width: 1024px) {
    .research-carousel {
        padding: 0 60px;
    }
    
    .research-card {
        min-width: 300px;
    }
}

@media (max-width: 768px) {
    .research-carousel {
        padding: 0 50px;
    }
    
    .research-card {
        min-width: 280px;
        padding: 1.5rem;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .research-carousel {
        padding: 0 40px;
    }
    
    .research-card {
        min-width: 260px;
    }
    
    .carousel-btn {
        width: 35px;
        height: 35px;
    }
    
    .carousel-prev {
        left: 5px;
    }
    
    .carousel-next {
        right: 5px;
    }
}

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

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

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

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

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

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

.contact-item i {
    width: 45px;
    height: 45px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

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

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

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

.contact-form {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 20px var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

.form-group textarea {
    resize: vertical;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-primary);
    padding: 2rem;
    border-top: 1px solid var(--bg-tertiary);
}

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

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

.footer-links {
    display: flex;
    gap: 2rem;
}

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

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

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

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

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

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: left var(--transition-base);
        box-shadow: 0 10px 27px var(--shadow);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-actions {
        display: flex;
        gap: 0.5rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        height: 300px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .scroll-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .image-placeholder {
        width: 200px;
        height: 200px;
        font-size: 5rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .education-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Legal Pages (Impressum & Datenschutz)
   ============================================ */
.legal-page {
    min-height: 80vh;
    padding: 8rem 2rem 4rem;
    background: var(--bg-primary);
}

.legal-page h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    text-align: center;
}

.legal-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 20px var(--shadow);
}

.legal-content h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-primary);
}

.legal-content h2:first-child {
    margin-top: 0;
}

.legal-content h3 {
    font-size: 1.3rem;
    color: var(--accent-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
}

.legal-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

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

.legal-content a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

.legal-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.back-link {
    text-align: center;
    margin-top: 3rem;
}

.back-link .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
    max-width: 500px;
    transform: translateX(calc(100% + 2rem));
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 10000;
    border-left: 4px solid var(--accent-primary);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast.toast-success {
    border-left-color: #28a745;
}

.toast.toast-success::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #28a745;
    color: white;
    font-weight: bold;
    flex-shrink: 0;
}

.toast.toast-error {
    border-left-color: #dc3545;
}

.toast.toast-error::before {
    content: '✕';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #dc3545;
    color: white;
    font-weight: bold;
    flex-shrink: 0;
}

.toast.toast-info {
    border-left-color: #007bff;
}

.toast.toast-info::before {
    content: 'ℹ';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #007bff;
    color: white;
    font-weight: bold;
    flex-shrink: 0;
}

/* ============================================
   Enhanced Social Links Hover Effects
   ============================================ */
.social-link {
    transition: all var(--transition-base);
}

.social-link:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 123, 255, 0.3);
}

.social-link:active {
    transform: translateY(-2px) scale(1.05);
}

@media (max-width: 768px) {
    .legal-content {
        padding: 2rem 1.5rem;
    }
    
    .legal-page h1 {
        font-size: 2rem;
    }
    
    .legal-content h2 {
        font-size: 1.5rem;
    }
    
    .legal-content h3 {
        font-size: 1.2rem;
    }
    
    .toast {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        min-width: auto;
    }
}