/* ==================== CSS Variables / Design System ==================== */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #010103;
    --bg-secondary: #0a0a0f;
    --bg-card: rgba(10, 10, 15, 0.8);
    --bg-card-hover: rgba(20, 20, 30, 0.9);
    
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-primary: #3b82f6;
    --accent-secondary: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.5);
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --gradient-accent: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    --gradient-card: linear-gradient(135deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.3) 100%);
    --gradient-name: linear-gradient(135deg, #60a5fa 0%, #3b82f6 50%, #2563eb 100%);
    
    /* Electric Effect */
    --electric-color: #3b82f6;
    --electric-glow: 0 0 10px rgba(59, 130, 246, 0.5), 0 0 20px rgba(59, 130, 246, 0.3), 0 0 30px rgba(59, 130, 246, 0.2);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.2);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
body.light {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: rgba(255, 255, 255, 1);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: rgba(0, 0, 0, 0.1);
    --border-hover: rgba(0, 0, 0, 0.2);
    
    --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.9) 100%);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* ==================== Base Styles ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ==================== 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;
}

.loading-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.loading-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse-glow 2s ease-in-out infinite;
}

.loading-icon .code-icon {
    width: 60px;
    height: 60px;
    color: var(--accent-primary);
}

.falling-text {
    display: flex;
    gap: 2px;
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.falling-text span {
    opacity: 0;
    transform: translateY(-50px);
    animation: fall-in 0.5s ease forwards;
    animation-delay: calc(var(--delay) * 0.1s);
    color: var(--text-primary);
}

.loading-icons {
    display: flex;
    gap: var(--spacing-md);
    font-size: 1.5rem;
}

.falling-icon {
    opacity: 0;
    transform: translateY(-30px) rotate(-15deg);
    animation: fall-rotate 0.6s ease forwards;
    animation-delay: calc(1s + var(--delay) * 0.15s);
}

.loading-bottom {
    margin-top: var(--spacing-xl);
}

.loading-icons-row {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.loading-icons-row svg {
    width: 24px;
    height: 24px;
    color: var(--accent-primary);
    opacity: 0;
    animation: fade-in 0.5s ease forwards 1.5s;
}

.designed-by {
    font-size: 0.875rem;
    color: var(--text-muted);
    opacity: 0;
    animation: fade-in 0.5s ease forwards 1.8s;
}

.designed-by span {
    background: var(--gradient-name);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

/* ==================== Particles Container ==================== */
.particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.particles-container.active {
    opacity: 1;
}

.particle {
    position: absolute;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    pointer-events: none;
}

.particle-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    transform-origin: left center;
    animation: particle-move 3s linear infinite;
}

/* ==================== App Container ==================== */
.app-container {
    max-width: 800px;
    margin: 0 auto;
    min-height: 100vh;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 2;
}

/* ==================== Header ==================== */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: var(--spacing-md);
}

.logo-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.logo-btn:hover {
    transform: scale(1.1);
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-glow);
}

.logo-icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.logo-btn:hover .logo-icon {
    transform: scale(1.1);
}

/* ==================== Navigation ==================== */
.nav-menu {
    position: relative;
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-xs);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}

.nav-menu li button {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.nav-menu li button:hover {
    color: var(--text-primary);
}

.nav-menu li.active button {
    color: var(--text-primary);
}

.active-element {
    position: absolute;
    height: calc(100% - 8px);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    top: 4px;
    transition: all var(--transition-smooth);
    opacity: 0;
    box-shadow: var(--electric-glow);
}

/* ==================== Header Actions ==================== */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Language Selector */
.language-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.lang-btn:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.1);
}

.chevron-icon {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
}

.lang-btn.active .chevron-icon {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xs);
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    backdrop-filter: blur(20px);
    z-index: 100;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown button {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.lang-dropdown button:hover,
.lang-dropdown button.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Toggle Buttons */
.toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.toggle-btn:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.toggle-btn.active {
    border-color: var(--accent-primary);
    background: rgba(59, 130, 246, 0.2);
    box-shadow: var(--electric-glow);
}

.toggle-btn svg {
    width: 20px;
    height: 20px;
    color: var(--text-primary);
}

/* Theme Toggle */
.theme-toggle .toggle-slider {
    position: relative;
    width: 20px;
    height: 20px;
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    transition: all var(--transition-smooth);
}

body.dark .theme-toggle .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

body.dark .theme-toggle .moon-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

body.light .theme-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

body.light .theme-toggle .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}

/* Social Icons */
.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.social-btn:hover {
    transform: scale(1.1);
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-glow);
}

.social-btn svg {
    width: 20px;
    height: 20px;
}

.donate-btn:hover {
    border-color: #ec4899;
    background: rgba(236, 72, 153, 0.2);
    color: #ec4899;
    box-shadow: 0 0 20px rgba(236, 72, 153, 0.3);
}

/* ==================== Terminal ==================== */
.terminal-container {
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(-20px);
    transition: all var(--transition-smooth);
    max-height: 0;
}

.terminal-container.active {
    opacity: 1;
    transform: translateY(0);
    max-height: 200px;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

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

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

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.terminal-body {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.terminal-line {
    color: #22c55e;
}

.terminal-line::before {
    content: '$ ';
    color: var(--accent-primary);
}

/* ==================== Main Content ==================== */
.main-content {
    position: relative;
}

.section {
    display: none;
    animation: fade-slide-in 0.4s ease;
}

.section.active {
    display: block;
}

/* ==================== Hero Section ==================== */
.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 640px) {
    .hero-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-card {
        grid-column: span 2;
    }
}

/* Hero Card */
.hero-card {
    display: flex;
    flex-direction: column;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(10px);
    overflow: hidden;
    transition: all var(--transition-base);
}

@media (min-width: 640px) {
    .hero-card {
        flex-direction: row;
    }
}

.hero-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

/* Lottie Animation Container */
.lottie-container {
    position: relative;
    width: 150px;
    height: 150px;
    flex-shrink: 0;
    margin: var(--spacing-md);
}

@media (min-width: 640px) {
    .lottie-container {
        margin: 0;
    }
}

.lottie-anim {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: scale(0.7);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.lottie-anim.active {
    opacity: 1;
    transform: scale(1);
}

.hero-info {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }
}

.name-highlight {
    background: var(--gradient-name);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-left: var(--spacing-sm);
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.flag-icon {
    display: inline-block;
    vertical-align: middle;
    border-radius: 2px;
    margin-left: 4px;
}

/* ==================== Cards ==================== */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    position: relative;
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.card-title {
    position: absolute;
    top: -12px;
    left: var(--spacing-md);
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Technologies Card */
.technologies-card {
    padding-top: var(--spacing-xl);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

.tech-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.tech-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

.tech-icon {
    width: 32px;
    height: 32px;
}

/* Status Card */
.status-card {
    padding: var(--spacing-md);
}

.status-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.status-username {
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition-base);
}

.status-username:hover {
    color: var(--accent-primary);
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
}

.status-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    animation: pulse 2s infinite;
}

.status-content {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.status-project {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    transition: color var(--transition-base);
}

.status-project:hover {
    color: var(--text-primary);
}

.project-name {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ==================== About Section ==================== */
.about-container {
    padding: var(--spacing-lg) 0;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    background: var(--gradient-name);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.about-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-weight: 500;
    color: var(--text-primary);
}

.about-bio {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

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

/* ==================== Projects Section ==================== */
.projects-container {
    padding: var(--spacing-lg) 0;
}

.section-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.link-highlight {
    color: var(--accent-primary);
    font-weight: 500;
    transition: color var(--transition-base);
}

.link-highlight:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

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

.project-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.project-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

.project-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.project-desc {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    flex: 1;
}

.project-desc p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

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

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.project-link:hover {
    background: rgba(255, 255, 255, 0.2);
}

.link-icon {
    width: 16px;
    height: 16px;
}

.project-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Electric Border Effect */
.electric-border {
    position: relative;
    overflow: hidden;
}

.electric-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.4), transparent);
    transition: left 0.5s ease;
}

.electric-border:hover::before {
    left: 100%;
}

.electric-border:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--electric-glow);
}

/* ==================== Contact Section ==================== */
.contact-container {
    padding: var(--spacing-lg) 0;
}

.contact-content {
    display: flex;
    justify-content: center;
}

.contact-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    backdrop-filter: blur(10px);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

.contact-avatar {
    margin-bottom: var(--spacing-lg);
}

.avatar-gradient {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-gradient svg {
    width: 40px;
    height: 40px;
    color: white;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.contact-info p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: var(--spacing-lg) 0;
}

.contact-cta {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.contact-cta h4 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.contact-cta > p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-xl);
    font-weight: 500;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--electric-glow);
}

.cta-btn svg {
    width: 18px;
    height: 18px;
}

/* ==================== Footer ==================== */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ==================== Chatbot Widget ==================== */
.chatbot-widget {
    position: fixed;
    bottom: 100px;
    right: 20px;
    width: 320px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transition: all var(--transition-smooth);
    box-shadow: var(--shadow-lg);
}

.chatbot-widget.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

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

.chatbot-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chatbot-avatar svg {
    width: 20px;
    height: 20px;
    color: white;
}

.chatbot-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.chatbot-name {
    font-weight: 600;
    font-size: 0.9375rem;
}

.chatbot-status {
    font-size: 0.75rem;
    color: #22c55e;
}

.chatbot-close {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    color: var(--text-muted);
    transition: all var(--transition-base);
}

.chatbot-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.chatbot-body {
    padding: var(--spacing-md);
}

.chat-messages {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: var(--spacing-md);
}

.chat-message {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
}

.chat-message p {
    font-size: 0.9375rem;
    line-height: 1.5;
}

.chat-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.chat-action-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-lg);
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.chat-action-btn:hover {
    background: var(--accent-primary);
    color: white;
}

/* Chatbot Toggle Button */
.chatbot-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.chatbot-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--electric-glow);
}

.chatbot-toggle .chat-icon {
    width: 28px;
    height: 28px;
    color: white;
}

/* ==================== Scroll to Top ==================== */
.scroll-top {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 50px;
    height: 50px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

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

.scroll-top:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--electric-glow);
    transform: translateY(-4px);
}

.scroll-top svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
}

/* ==================== Animations ==================== */
@keyframes fall-in {
    0% {
        opacity: 0;
        transform: translateY(-50px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fall-rotate {
    0% {
        opacity: 0;
        transform: translateY(-30px) rotate(-15deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) rotate(0);
    }
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fade-slide-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes pulse-glow {
    0%, 100% {
        filter: drop-shadow(0 0 5px var(--accent-glow));
    }
    50% {
        filter: drop-shadow(0 0 20px var(--accent-glow));
    }
}

@keyframes particle-move {
    0% {
        transform: translateX(-100%) scaleX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
        transform: translateX(0) scaleX(1);
    }
    90% {
        opacity: 1;
        transform: translateX(calc(100vw - 100%)) scaleX(1);
    }
    100% {
        opacity: 0;
        transform: translateX(100vw) scaleX(0);
    }
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-md);
    }
    
    .header-content {
        flex-wrap: wrap;
    }
    
    .nav-menu {
        order: 3;
        width: 100%;
        margin-top: var(--spacing-md);
    }
    
    .nav-menu ul {
        width: 100%;
        justify-content: center;
    }
    
    .nav-menu li button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }
    
    .header-actions {
        gap: var(--spacing-xs);
    }
    
    .social-icons {
        display: none;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .tech-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: var(--spacing-md);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .chatbot-widget {
        width: calc(100% - 40px);
        right: 20px;
        left: 20px;
    }
}

@media (max-width: 480px) {
    .language-selector {
        display: none;
    }
    
    .animation-toggle {
        display: none;
    }
    
    .lottie-container {
        width: 100px;
        height: 100px;
    }
}