/* ============================================
   Professional Portfolio - Main Stylesheet
   ============================================ */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@600;700;800&display=swap');

/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
  /* Colors - HSL for rich, vibrant palette */
  --color-bg-primary: hsl(230, 25%, 8%);
  --color-bg-secondary: hsl(230, 20%, 12%);
  --color-bg-card: hsla(230, 20%, 15%, 0.6);
  --color-text-primary: hsl(0, 0%, 98%);
  --color-text-secondary: hsl(0, 0%, 75%);
  --color-text-muted: hsl(0, 0%, 55%);
  --color-accent-primary: hsl(260, 85%, 65%);
  --color-accent-secondary: hsl(200, 90%, 60%);
  --color-accent-tertiary: hsl(320, 75%, 60%);
  --color-border: hsla(0, 0%, 100%, 0.1);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, hsl(260, 85%, 65%) 0%, hsl(200, 90%, 60%) 100%);
  --gradient-card: linear-gradient(135deg, hsla(260, 85%, 65%, 0.1) 0%, hsla(200, 90%, 60%, 0.05) 100%);
  --gradient-hero: radial-gradient(ellipse at top, hsla(260, 85%, 65%, 0.15) 0%, transparent 50%);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Typography */
  --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.875rem;
  --font-size-sm: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 2rem;
  --font-size-2xl: 3rem;
  --font-size-3xl: 4rem;
  
  /* Effects */
  --shadow-sm: 0 2px 8px hsla(0, 0%, 0%, 0.1);
  --shadow-md: 0 4px 16px hsla(0, 0%, 0%, 0.2);
  --shadow-lg: 0 8px 32px hsla(0, 0%, 0%, 0.3);
  --blur-glass: 12px;
  
  /* Transitions */
  --transition-fast: 200ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  background-image: var(--gradient-hero);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-text-primary);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-text-primary);
}

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

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

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

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

.section {
  padding: var(--space-3xl) 0;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2xl) 0;
  position: relative;
}

.hero-content {
  max-width: 800px;
  animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  font-weight: 500;
}

.hero-description {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: var(--space-md) var(--space-xl);
  border-radius: 12px;
  font-weight: 600;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
  display: inline-block;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px hsla(260, 85%, 65%, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px hsla(260, 85%, 65%, 0.4);
}

.btn-secondary {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(var(--blur-glass));
}

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

/* ============================================
   Projects Section
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: var(--space-xl);
  backdrop-filter: blur(var(--blur-glass));
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-lg);
}

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

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

.project-icon {
  font-size: 2rem;
}

.project-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xs);
}

.project-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.tech-badge {
  padding: 0.375rem 0.875rem;
  background: hsla(260, 85%, 65%, 0.15);
  border: 1px solid hsla(260, 85%, 65%, 0.3);
  border-radius: 6px;
  font-size: var(--font-size-xs);
  color: var(--color-accent-primary);
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.project-link:hover {
  background: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  color: white;
  transform: translateX(4px);
}

/* ============================================
   Tech Stack Section
   ============================================ */
.tech-stack {
  text-align: center;
}

.tech-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.tech-category {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-lg);
  backdrop-filter: blur(var(--blur-glass));
}

.tech-category-title {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-md);
  color: var(--color-accent-secondary);
}

.tech-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.tech-item {
  padding: 0.5rem 1rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.tech-item:hover {
  background: var(--gradient-card);
  border-color: var(--color-accent-primary);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
  text-align: center;
}

.contact-links {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-2xl);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  font-weight: 500;
  backdrop-filter: blur(var(--blur-glass));
  transition: all var(--transition-normal);
}

.contact-link:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: white;
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  font-size: 1.5rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--space-2xl) 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-3xl);
}

.footer-text {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

/* ============================================
   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(-10px);
  }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  :root {
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
  }
  
  .hero {
    min-height: auto;
    padding: var(--space-3xl) 0;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .tech-categories {
    grid-template-columns: 1fr;
  }
  
  .contact-links {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .project-card {
    padding: var(--space-lg);
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}