/* Modern CSS Reset and Variables */
:root {
  /* Color Palette - Professional and Modern */
  --primary-color: #0f172a;
  --secondary-color: #1e293b;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --background-light: #ffffff;
  --background-dark: #0f172a;
  --surface-light: #f8fafc;
  --surface-dark: #1e293b;
  --border-color: #e2e8f0;
  --gradient-primary: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: 'Playfair Display', Georgia, serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Modern Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  background-color: var(--surface-light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Layout */
.container {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 100vh;
  max-width: 100vw;
  margin: 0;
  background: var(--background-light);
  box-shadow: var(--shadow-lg);
}

/* Sidebar */
.sidebar {
  background-color: var(--background-dark);
  color: var(--background-light);
  padding: var(--spacing-xl);
  position: fixed;
  width: 320px;
  height: 100vh;
  overflow-y: auto;
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border-right: 1px solid var(--border-color);
}

.profile-img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent-color);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.profile-img:hover {
  transform: scale(1.05);
  border-color: var(--accent-hover);
}

.name {
  font-family: var(--font-secondary);
  font-size: 2rem;
  font-weight: 700;
  margin: var(--spacing-md) 0 var(--spacing-xs);
  color: var(--background-light);
  letter-spacing: -0.5px;
}

.tagline {
  font-size: 1.1rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-xl);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* Navigation */
.nav-links {
  list-style: none;
  margin: var(--spacing-md) 0;
  width: 100%;
}

.nav-links li {
  margin: var(--spacing-xs) 0;
}

.nav-links a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--background-light);
  text-decoration: none;
  border-radius: 8px;
  transition: all var(--transition-fast);
  font-weight: 500;
  letter-spacing: 0.3px;
}

.nav-links a:hover {
  background-color: var(--accent-color);
  transform: translateX(5px);
  color: white;
}

.nav-links a[aria-current="page"] {
  background-color: var(--accent-color);
  color: white;
}

/* Social Icons */
.social-icons {
  display: flex;
  gap: var(--spacing-md);
  margin-top: auto;
  padding: var(--spacing-lg) 0;
}

.social-icons a {
  color: var(--background-light);
  font-size: 1.5rem;
  transition: all var(--transition-fast);
  padding: var(--spacing-xs);
  border-radius: 50%;
  background-color: var(--surface-dark);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* Main Content */
.main-content {
  padding: var(--spacing-2xl) var(--spacing-xl);
  margin-left: 320px;
  width: calc(100vw - 320px);
  max-width: 1200px;
  background: var(--background-light);
  margin-right: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  min-height: 100vh;
  box-sizing: border-box;
}

.main-content h1 {
  font-family: var(--font-secondary);
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -1px;
  position: relative;
  padding-bottom: var(--spacing-md);
}

.main-content h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--accent-color);
  border-radius: 2px;
}

.main-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 800px;
}

.topics {
  list-style: none;
  margin: var(--spacing-xl) 0;
  display: grid;
  gap: var(--spacing-md);
  max-width: 800px;
}

.topics li {
  font-size: 1.1rem;
  padding: var(--spacing-md);
  background-color: var(--surface-light);
  border-radius: 12px;
  transition: all var(--transition-fast);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.topics li:hover {
  transform: translateX(10px);
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
  box-shadow: var(--shadow-md);
}

/* Mobile Navigation Toggle */
.mobile-nav-toggle {
  display: none;
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 1001;
  background: var(--accent-color);
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  cursor: pointer;
  padding: 12px;
  color: white;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: currentColor;
  transition: all var(--transition-fast);
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

/* Responsive Design */
@media (max-width: 1200px) {
  .main-content {
    max-width: 100%;
    width: 100vw;
    margin-left: 320px;
    padding: var(--spacing-xl) var(--spacing-lg);
  }
}

@media (max-width: 1024px) {
  .container {
    grid-template-columns: 280px 1fr;
  }
  .sidebar {
    width: 280px;
  }
  .main-content {
    margin-left: 280px;
    width: calc(100vw - 280px);
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .container {
    grid-template-columns: 1fr;
  }
  .sidebar {
    transform: translateX(-100%);
    z-index: 1000;
  }
  .sidebar.active {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    width: 100vw;
    padding: var(--spacing-lg) var(--spacing-sm);
    max-width: 100%;
  }
  .main-content h1 {
    font-size: 2.5rem;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .mobile-nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
  }
  .mobile-nav-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg);
    top: 0;
  }
  .mobile-nav-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
  }
}

/* Animations */
@keyframes fadeIn {
  from { 
    opacity: 0; 
    transform: translateY(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

.main-content > * {
  animation: fadeIn 0.6s ease-out forwards;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus States */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--surface-light);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-hover);
}

/* Hero Section */
.hero-section {
  margin-bottom: var(--spacing-lg);
}

.hero-text {
  font-size: 1.3rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 800px;
}

/* Skills Section */
.skills-section {
  margin: var(--spacing-lg) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.skill-card {
  background: var(--surface-light);
  padding: var(--spacing-lg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  text-align: center;
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
}

.skill-card i {
  font-size: 2.5rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-md);
}

.skill-card h3 {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.skill-card p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Projects Section */
.projects-section {
  margin: var(--spacing-2xl) 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.project-card {
  background: var(--surface-light);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
}

.project-content {
  padding: var(--spacing-lg);
}

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

.project-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

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

.project-tags span {
  background: var(--surface-dark);
  color: var(--background-light);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* CTA Section */
.cta-section {
  margin: var(--spacing-2xl) 0;
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--surface-light);
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

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

.cta-button {
  padding: 0.8rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.cta-button.primary {
  background: var(--gradient-primary);
  color: white;
}

.cta-button.secondary {
  background: var(--surface-light);
  color: var(--accent-color);
  border: 2px solid var(--accent-color);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.cta-button.secondary:hover {
  background: var(--accent-color);
  color: white;
}

/* Section Headers */
section h2 {
  font-family: var(--font-secondary);
  font-size: 2.2rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-md);
}

section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-color);
  border-radius: 2px;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-button {
    width: 100%;
    text-align: center;
  }

  section h2 {
    font-size: 1.8rem;
  }

  .hero-text {
    font-size: 1.1rem;
  }
}