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

:root {
    /* Dark Theme Color Palette */
    --bg-primary: #0a0a0f;
    --bg-secondary: #13131a;
    --bg-tertiary: #1a1a24;
    --bg-card: #1e1e2e;
    --bg-hover: #252535;
    
    /* Text Colors */
    --text-primary: #e8e8f0;
    --text-secondary: #a8a8b8;
    --text-tertiary: #787888;
    --text-muted: #58586a;
    
    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #ec4899;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    
    /* Border Colors */
    --border-color: #2a2a3a;
    --border-hover: #3a3a4a;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    
    /* Transitions */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

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

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

/* ===================================
   Navigation
   =================================== */
.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

.nav-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.nav-link {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-base);
    position: relative;
    padding: var(--spacing-xs);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

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

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

.nav-label {
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.nav-desc {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    transition: var(--transition-base);
}

.nav-link:hover .nav-desc {
    color: var(--text-secondary);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: translateX(-50%) scale(1); }
    50% { opacity: 0.8; transform: translateX(-50%) scale(1.1); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.03em;
    position: relative;
}

.glitch {
    position: relative;
    display: inline-block;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glitch-text 3s ease-in-out infinite;
}

@keyframes glitch-text {
    0%, 90%, 100% { transform: translate(0); }
    92% { transform: translate(-2px, 2px); }
    94% { transform: translate(2px, -2px); }
    96% { transform: translate(-2px, -2px); }
    98% { transform: translate(2px, 2px); }
}

.hero-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.tag:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-4px) rotate(5deg);
}

.expertise {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.expertise-item {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.expertise-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    transition: left 0.5s ease;
}

.expertise-item:hover::before {
    left: 100%;
}

.expertise-item:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.2);
}

/* ===================================
   Work Section
   =================================== */
.work {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: var(--spacing-md);
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--accent-gradient);
    border-radius: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

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

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
}

.project-header {
    margin-bottom: var(--spacing-md);
}

.project-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

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

.project-image {
    margin-bottom: var(--spacing-md);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(99, 102, 241, 0.1) 50%,
        transparent 70%
    );
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.placeholder-text {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-muted);
    z-index: 1;
}

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

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.project-tag {
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    transition: var(--transition-base);
}

.project-tag:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--text-secondary);
}

.project-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
    margin-top: var(--spacing-sm);
}

.project-link:hover {
    gap: calc(var(--spacing-xs) + 4px);
    color: var(--accent-secondary);
}

.arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 50%;
    transition: var(--transition-base);
    font-weight: 400;
}

.project-link:hover .arrow {
    background: var(--accent-secondary);
    transform: rotate(90deg);
}

.view-all {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.view-all-link {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 100px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.view-all-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    background: var(--accent-gradient);
    border-radius: 100px;
    transition: all 0.5s ease;
    z-index: -1;
}

.view-all-link:hover::before {
    width: 100%;
    height: 100%;
}

.view-all-link:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

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

.footer-content {
    text-align: center;
}

.footer-thanks {
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
}

.footer-link {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

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

.footer-cta {
    margin: var(--spacing-xl) 0;
}

.footer-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-email {
    display: inline-block;
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 3vw, 2rem);
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition-base);
    margin-bottom: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.footer-email::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-gradient);
    transition: left 0.5s ease;
    z-index: -1;
}

.footer-email:hover::before {
    left: 0;
}

.footer-email:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.3);
}

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

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.footer-social-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-base);
    position: relative;
    padding-bottom: 4px;
}

.footer-social-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

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

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav-container {
        gap: var(--spacing-md);
    }
    
    .nav-label {
        font-size: 0.85rem;
    }
    
    .nav-desc {
        font-size: 0.7rem;
    }
    
    .hero {
        padding: calc(80px + var(--spacing-md)) 0 var(--spacing-md);
    }
    
    .hero-content {
        flex-direction: column;
    }
    
    .expertise {
        grid-template-columns: 1fr;
    }
    
    .projects {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-social {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .nav-container {
        gap: var(--spacing-sm);
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .tag {
        font-size: 0.75rem;
        padding: 4px 10px;
    }
}

/* ===================================
   Accessibility
   =================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
}