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

:root {
    /* Color Variables - Vue.js Green Theme */
    --primary-color: #42b883;
    --primary-dark: #369870;
    --primary-light: #4fc08d;
    --primary-gradient: linear-gradient(135deg, #42b883 0%, #4fc08d 100%);
    --secondary-color: #35495e;
    --accent-color: #ff6b35;
    --text-primary: #ffffff;
    --text-secondary: #b0bec5;
    --text-light: #78909c;
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f29;
    --bg-card: #1e2328;
    --bg-dark: #0d1117;
    --bg-gradient: linear-gradient(135deg, #0f1419 0%, #1a1f29 100%);
    --bg-hero: radial-gradient(ellipse at center, rgba(66, 184, 131, 0.1) 0%, rgba(15, 20, 25, 0.9) 70%);
    --border-color: #30363d;
    --border-glow: rgba(66, 184, 131, 0.4);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.2);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.4);
    --shadow-glow: 0 0 20px rgba(66, 184, 131, 0.3);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Breakpoints */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}

/* Animated Background Canvas */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: 
        radial-gradient(circle at 20% 80%, rgba(66, 184, 131, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(79, 192, 141, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(53, 73, 94, 0.05) 0%, transparent 50%);
}

/* Floating Particles */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(66, 184, 131, 0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(79, 192, 141, 0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(66, 184, 131, 0.4), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(79, 192, 141, 0.2), transparent),
        radial-gradient(2px 2px at 160px 30px, rgba(66, 184, 131, 0.3), transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: float-particles 20s linear infinite;
}

@keyframes float-particles {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-200px, -100px); }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

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

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

/* Layout Components */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.section {
    padding: var(--space-20) 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    text-decoration: none;
    font-size: var(--font-size-base);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary:hover::before {
    left: 100%;
}

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

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

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    position: relative;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), 0 0 20px var(--border-glow);
    border-color: var(--border-glow);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 1rem;
    padding: 1px;
    background: linear-gradient(135deg, var(--border-glow), transparent);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: xor;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover::before {
    opacity: 1;
}

.card-compact {
    padding: var(--space-4);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-fast);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-4);
}

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-6);
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--space-2) var(--space-3);
    border-radius: 0.5rem;
    transition: all var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

/* Hero Section */
.hero {
    padding: var(--space-24) 0 var(--space-20);
    background: var(--bg-hero);
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(66, 184, 131, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(79, 192, 141, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(53, 73, 94, 0.08) 0%, transparent 60%);
    z-index: -1;
    animation: float 12s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { 
        transform: translate(0, 0) scale(1);
        opacity: 0.8;
    }
    33% { 
        transform: translate(30px, -30px) scale(1.1);
        opacity: 1;
    }
    66% { 
        transform: translate(-20px, 20px) scale(0.9);
        opacity: 0.6;
    }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 30px rgba(66, 184, 131, 0.3));
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { filter: drop-shadow(0 0 10px rgba(66, 184, 131, 0.3)); }
    to { filter: drop-shadow(0 0 20px rgba(66, 184, 131, 0.6)); }
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    font-weight: 400;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-image {
    margin-top: var(--space-12);
    text-align: center;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-glow), var(--shadow-xl);
    object-fit: cover;
    transition: all var(--transition-normal);
    animation: pulse 3s ease-in-out infinite;
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 0 40px rgba(66, 184, 131, 0.5), var(--shadow-xl);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(66, 184, 131, 0.3), var(--shadow-xl); }
    50% { box-shadow: 0 0 30px rgba(66, 184, 131, 0.5), var(--shadow-xl); }
}

/* GitHub Profile Section */
.github-profile {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
    position: relative;
}

.github-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.stat-card {
    text-align: center;
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-xl), 0 0 15px var(--border-glow);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.achievements {
    margin-top: var(--space-8);
    text-align: center;
}

.achievement-list {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-top: var(--space-4);
}

.achievement-badge {
    background: var(--bg-secondary);
    padding: var(--space-3) var(--space-4);
    border-radius: 2rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

/* Tool Showcase */
.tool-showcase {
    background: var(--bg-secondary);
    padding: var(--space-20) 0;
    position: relative;
    overflow: hidden;
}

.tool-showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 40%, rgba(66, 184, 131, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(79, 192, 141, 0.06) 0%, transparent 50%);
    z-index: 0;
    animation: background-shift 15s ease-in-out infinite;
}

@keyframes background-shift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(20px, -20px) scale(1.1); }
}

/* Language Toggle */
.language-toggle {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.lang-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 0.8rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-glow);
}

.lang-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.showcase-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.showcase-description {
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto;
}

.tool-preview {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    margin-top: var(--space-8);
    position: relative;
    z-index: 1;
    transition: all var(--transition-normal);
}

.tool-preview:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), 0 0 30px var(--border-glow);
    border-color: var(--border-glow);
}

.tool-header {
    background: var(--primary-gradient);
    color: white;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    position: relative;
    overflow: hidden;
}

.tool-header::after {
    content: '';
    position: absolute;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { right: -100%; }
    100% { right: 100%; }
}

.tool-content {
    padding: var(--space-8);
    text-align: center;
}

/* Features Grid */
.features {
    padding: var(--space-20) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.feature-card {
    text-align: center;
    padding: var(--space-8);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl), 0 0 25px var(--border-glow);
    border-color: var(--border-glow);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    color: white;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    transition: all var(--transition-normal);
    position: relative;
    z-index: 1;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

.feature-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-3);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Contact Section */
.contact {
    background: var(--bg-dark);
    color: white;
    padding: var(--space-20) 0;
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact h2 {
    color: white;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-8);
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: white;
    padding: var(--space-3) var(--space-6);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 2rem;
    transition: all var(--transition-fast);
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: var(--space-8) 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
        --space-20: 3rem;
        --space-24: 4rem;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--space-4);
        box-shadow: var(--shadow-lg);
        gap: var(--space-2);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .profile-image {
        width: 150px;
        height: 150px;
    }
    
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
    
    .github-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .github-stats {
        grid-template-columns: 1fr;
    }
    
    .achievement-list {
        flex-direction: column;
        align-items: center;
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

.scroll-animate.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}