@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.1);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  /* Enhanced responsive spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Responsive font sizes using clamp() */
  --text-xs: clamp(0.75rem, 2vw, 0.875rem);
  --text-sm: clamp(0.875rem, 2.2vw, 1rem);
  --text-base: clamp(1rem, 2.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 3vw, 1.25rem);
  --text-xl: clamp(1.25rem, 3.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 4vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 5vw, 2.25rem);
  --text-4xl: clamp(2.25rem, 6vw, 3rem);
  --text-5xl: clamp(3rem, 8vw, 4rem);
  --text-6xl: clamp(4rem, 10vw, 6rem);
  
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.12);
  
  --border-radius: 0.5rem;
  --border-radius-md: 0.75rem;
  --border-radius-lg: 1rem;
  --border-radius-xl: 1.5rem;
  --border-radius-2xl: 2rem;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --backdrop-blur: blur(20px);
  --border-color: #e5e7eb;
  --primary-color: #6366f1;
  
  /* Container widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* Mobile-first responsive spacing adjustments */
@media (max-width: 380px) {
  :root {
    --space-4: 0.75rem;
    --space-6: 1rem;
    --space-8: 1.5rem;
    --space-12: 2rem;
    --space-16: 2.5rem;
    --space-20: 3rem;
    --space-24: 4rem;
  }
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-glass: rgba(0, 0, 0, 0.2);
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4);
  --border-color: #334155;
  --gray-200: #334155;
  --gray-300: #475569;
}

/* Enhanced reset and base styles */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: clamp(70px, 10vw, 100px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
  font-size: var(--text-base);
  min-height: 100vh;
}

/* Enhanced background effects */
.vector-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -2;
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

.bg-pattern {
  width: 100%;
  height: 100%;
  opacity: 0.5;
}

.floating-shapes {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  opacity: 0.1;
  animation: float 20s infinite ease-in-out;
  will-change: transform;
}

.shape-1 {
  width: clamp(60px, 8vw, 80px);
  height: clamp(60px, 8vw, 80px);
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: clamp(45px, 6vw, 60px);
  height: clamp(45px, 6vw, 60px);
  top: 70%;
  right: 15%;
  animation-delay: -5s;
}

.shape-3 {
  width: clamp(75px, 10vw, 100px);
  height: clamp(75px, 10vw, 100px);
  bottom: 20%;
  left: 80%;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { 
    transform: translate(0, 0) rotate(0deg);
  }
  33% { 
    transform: translate(-30px, -30px) rotate(120deg);
  }
  66% { 
    transform: translate(30px, 30px) rotate(240deg);
  }
}

/* Enhanced loading screen */
#loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.3s ease;
}

.modern-loader {
  text-align: center;
}

.loader-ring {
  width: clamp(50px, 8vw, 60px);
  height: clamp(50px, 8vw, 60px);
  border: 3px solid var(--gray-200);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

.loader-text {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Enhanced header with improved mobile design */
.modern-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition);
  min-height: clamp(60px, 8vh, 80px);
}

[data-theme="dark"] .modern-header {
  background: rgba(15, 23, 42, 0.9);
  border-bottom-color: var(--gray-700);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  max-width: var(--container-2xl);
  margin: 0 auto;
  min-height: inherit;
}

@media (max-width: 768px) {
  .nav-container {
    padding: var(--space-3) var(--space-4);
  }
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* Enhanced navigation links */
.nav-links {
  display: flex;
  list-style: none;
  gap: clamp(1rem, 3vw, 2rem);
  transition: var(--transition);
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: var(--transition-fast);
  font-size: var(--text-sm);
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  background: none;
  border: none;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transform: rotate(20deg);
}

[data-theme="dark"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  z-index: 101;
  position: relative;
  min-width: 44px;
  min-height: 44px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
  border-radius: 2px;
}

/* Enhanced hero section */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(4rem, 15vh, 8rem) var(--space-4);
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: var(--container-2xl);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 4rem);
  align-items: center;
  width: 100%;
}

.hero-title {
  font-size: var(--text-6xl);
  font-weight: 900;
  line-height: 1;
  margin-bottom: var(--space-6);
}

.title-line {
  display: block;
  animation: fadeInUp 0.8s ease backwards;
}

.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }
.title-line:nth-child(3) { animation-delay: 0.3s; }

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

.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient-shift 3s ease-in-out infinite;
}

@keyframes gradient-shift {
  0%, 100% { filter: hue-rotate(0deg); }
  50% { filter: hue-rotate(45deg); }
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 500px;
  animation: fadeInUp 0.8s ease 0.4s backwards;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.5s backwards;
}

/* Enhanced buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: clamp(0.75rem, 2vw, 0.875rem) clamp(1.25rem, 3vw, 1.5rem);
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: var(--text-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  min-height: 44px;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: var(--shadow-lg);
}

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

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--gray-300);
}

.btn-outline:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary);
  color: var(--primary);
}

.visual-container {
  position: relative;
  animation: fadeInUp 0.8s ease 0.6s backwards;
}

.hero-graphic {
  width: 100%;
  height: clamp(300px, 40vh, 400px);
  filter: drop-shadow(0 10px 30px rgba(99, 102, 241, 0.2));
}

/* Enhanced animations */
.pulse {
  animation: pulse 2s ease-in-out infinite;
}

.orbit-1 {
  animation: rotate 20s linear infinite;
  transform-origin: 200px 200px;
}

.connection-line {
  animation: dash 3s ease-in-out infinite;
  stroke-dasharray: 5, 5;
}

.float-element {
  animation: float-up-down 4s ease-in-out infinite;
}

.float-element:nth-child(odd) { 
  animation-delay: -2s; 
}

@keyframes pulse {
  0%, 100% { 
    opacity: 1; 
    transform: scale(1); 
  }
  50% { 
    opacity: 0.7; 
    transform: scale(1.05); 
  }
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes dash {
  0%, 100% { stroke-dashoffset: 0; }
  50% { stroke-dashoffset: 10; }
}

@keyframes float-up-down {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: var(--text-sm);
  animation: fadeInUp 1s ease 1s backwards;
}

.scroll-mouse {
  width: clamp(20px, 4vw, 24px);
  height: clamp(35px, 6vw, 40px);
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.scroll-wheel {
  width: 2px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 1px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 2s ease-in-out infinite;
}

@keyframes scroll-wheel {
  0% { 
    opacity: 1; 
    transform: translateX(-50%) translateY(0); 
  }
  100% { 
    opacity: 0; 
    transform: translateX(-50%) translateY(16px); 
  }
}

/* Enhanced section layouts */
.section {
  padding: clamp(3rem, 8vh, 6rem) var(--space-4);
  position: relative;
}

.container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  width: 100%;
  padding: 0 var(--space-4);
}

.section-header {
  text-align: center;
  margin-bottom: clamp(3rem, 6vh, 4rem);
}

.section-title {
  font-size: var(--text-5xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Enhanced about section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 4rem);
  align-items: center;
}

.about-text p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.8;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
  background: var(--bg-glass);
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  display: block;
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
}

/* Enhanced profile card */
.profile-card {
  position: relative;
  background: var(--bg-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--shadow-glass);
  transition: var(--transition);
}

.profile-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.card-glow {
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: inherit;
  opacity: 0.5;
  filter: blur(10px);
  z-index: -1;
}

.avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  box-shadow: var(--shadow);
  overflow: hidden;            /* ensures image is clipped to circle */
  border: 3px solid color-mix(in srgb, var(--primary) 30%, transparent);
}

.avatar:hover {
  transform: scale(1.1) rotate(5deg);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;           /* cover to fill the circle */
  display: block;
}

.avatar-fallback {
  display: none;               /* hidden when image loads */
  place-items: center;
  width: 100%;
  height: 100%;
}

/* Optional: subtle hover */
.profile-card:hover .avatar {
  transform: translateY(-2px);
  transition: transform var(--transition);
}

/* Dark theme ring tweak */
[data-theme="dark"] .avatar {
  border-color: color-mix(in srgb, var(--primary) 45%, transparent);
}

.social-links {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Enhanced skills grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: var(--space-6);
}

.skill-card {
  background: var(--bg-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
  opacity: 0;
  transition: var(--transition);
}

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

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

.skill-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  color: white;
  transition: var(--transition);
}

.skill-card:hover .skill-icon {
  transform: scale(1.1) rotate(5deg);
}

.skill-card h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.skill-card p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* Enhanced project filters */
.project-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--gray-300);
  color: var(--text-secondary);
  padding: clamp(0.5rem, 2vw, 0.75rem) clamp(1rem, 3vw, 1.5rem);
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: var(--transition-fast);
  font-weight: 500;
  font-size: var(--text-sm);
  min-height: 44px;
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Enhanced projects grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
  gap: var(--space-6);
}

.project-card {
  background: var(--bg-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  transition: var(--transition-slow);
  position: relative;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--gray-200), var(--gray-300));
}

.project-preview {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.5s ease;
}

.project-card:hover .project-preview {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.85), rgba(0,0,0,0.5));
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

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

.project-actions {
  display: flex;
  gap: var(--space-4);
  z-index: 2;
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  color: white;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
}

.action-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: scale(1.15) rotate(5deg);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.action-btn:active {
  transform: scale(1.05);
}

.action-btn svg {
  pointer-events: none;
}

.expand-btn {
  background: rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.4);
}

.expand-btn:hover {
  background: var(--secondary);
  border-color: var(--secondary);
}

.project-content {
  padding: var(--space-6);
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.tag {
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 500;
  transition: var(--transition-fast);
}

.tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.project-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-description {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* Enhanced contact section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 4rem);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  transition: var(--transition);
}

.contact-item:hover {
  transform: translateX(5px);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  transition: var(--transition);
}

.contact-item:hover .contact-icon {
  transform: rotate(5deg) scale(1.05);
}

.contact-item h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.contact-item p {
  color: var(--text-secondary);
  font-size: var(--text-base);
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: var(--space-4);
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Enhanced contact form */
.contact-form {
  background: var(--bg-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  transition: var(--transition);
}

.contact-form:hover {
  box-shadow: var(--shadow-lg);
}

.form-group {
  position: relative;
  margin-bottom: var(--space-8);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-4);
  background: transparent;
  border: 2px solid var(--gray-300);
  border-radius: var(--border-radius-lg);
  font-size: var(--text-base);
  color: var(--text-primary);
  transition: var(--transition-fast);
  font-family: inherit;
  min-height: 44px;
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group label {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  color: var(--text-muted);
  font-size: var(--text-base);
  pointer-events: none;
  transition: var(--transition-fast);
  background: var(--bg-primary);
  padding: 0 0.5rem;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -0.5rem;
  left: 0.75rem;
  font-size: var(--text-sm);
  color: var(--primary);
}

.form-status {
  margin-top: var(--space-4);
  padding: 0.75rem;
  border-radius: var(--border-radius);
  font-size: var(--text-sm);
  text-align: center;
  display: none;
  animation: fadeInUp 0.3s ease;
}

.form-status.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid var(--success);
  display: block;
}

.form-status.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid var(--danger);
  display: block;
}

/* Enhanced footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--gray-200);
  padding: var(--space-12) var(--space-4) var(--space-8);
  transition: var(--transition);
}

[data-theme="dark"] .footer {
  background: var(--bg-tertiary);
  border-top-color: var(--gray-700);
}

.footer-content {
  max-width: var(--container-2xl);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.footer-brand p {
  color: var(--text-secondary);
  margin: 0;
  font-size: var(--text-base);
}

.footer-links {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
  font-size: var(--text-base);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-links a:hover {
  color: var(--primary);
  transform: translateY(-2px);
}

.footer-bottom {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-200);
  text-align: center;
}

[data-theme="dark"] .footer-bottom {
  border-top-color: var(--gray-700);
}

.footer-bottom p {
  color: var(--text-muted);
  margin: 0;
  font-size: var(--text-sm);
}

/* Enhanced modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal.active {
  display: flex;
  animation: fadeIn 0.3s ease;
}

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

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  width: 100%;
  max-width: min(1200px, 90vw);
  height: min(80vh, 600px);
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: rgba(0, 0, 0, 0.5);
  border: none;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  cursor: pointer;
  z-index: 10;
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: rotate(90deg);
}

.modal-body {
  width: 100%;
  height: 100%;
}

.modal-body iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Enhanced code explorer with better responsive design */
.code-explorer-container {
  display: grid;
  grid-template-columns: minmax(280px, 320px) 1fr;
  gap: 0;
  height: clamp(500px, 70vh, 700px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-primary);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  position: relative;
}

.file-tree-panel,
.file-viewer-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.file-tree-panel {
  border-right: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 60px;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.panel-header h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-count {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 500;
}

.file-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 4px;
  flex-wrap: wrap;
}

.file-path {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.file-size {
  font-size: var(--text-xs);
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 2px 6px;
    border-radius: 4px;
  font-weight: 500;
  white-space: nowrap;
}

/* Tree and viewer controls */
.tree-controls,
.viewer-controls {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.tree-btn,
.viewer-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 6px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  min-height: 32px;
}

.tree-btn:hover,
.viewer-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--primary-color);
  transform: translateY(-1px);
}

.tree-btn:active,
.viewer-btn:active {
  transform: translateY(0);
}

.file-tree {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.75rem;
}

.file-tree::-webkit-scrollbar {
  width: 8px;
}

.file-tree::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

.file-tree::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: 4px;
}

.file-tree::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}

.file-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5);
  background: var(--bg-primary);
}

.file-content::-webkit-scrollbar {
  width: 10px;
}

.file-content::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

.file-content::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: 5px;
}

.tree-node {
  user-select: none;
  margin-bottom: 2px;
}

.node-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  cursor: pointer;
  border-radius: 6px;
  font-size: var(--text-sm);
  transition: var(--transition-fast);
  position: relative;
}

.node-header:hover {
  background: var(--bg-tertiary);
}

.node-header.selected {
  background: var(--primary-color);
  color: white;
}

.node-header.selected .node-icon {
  color: white;
}

.node-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.node-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.node-children {
  margin-left: 16px;
  border-left: 2px solid var(--border-color);
  padding-left: 12px;
  transition: var(--transition-fast);
  max-height: 5000px;
  overflow: hidden;
}

.node-children.collapsed {
  max-height: 0;
  padding: 0;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-secondary);
  text-align: center;
  padding: var(--space-8);
}

.empty-icon {
  margin-bottom: var(--space-6);
  opacity: 0.5;
  animation: float 3s ease-in-out infinite;
}

.empty-state h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-size: var(--text-lg);
}

.empty-state p {
  margin-bottom: var(--space-6);
  max-width: 300px;
  line-height: 1.5;
  font-size: var(--text-base);
}

.empty-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-small {
  padding: 6px 12px;
  font-size: var(--text-sm);
}

.code-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  animation: slideInCode 0.4s ease;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.875rem var(--space-5);
  background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
  border-bottom: 1px solid var(--border-color);
  font-size: var(--text-sm);
  position: relative;
  min-height: 60px;
}

.code-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.3;
}

.code-header-left,
.code-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.code-filename {
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

.code-filename::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { 
    opacity: 1; 
    transform: scale(1); 
  }
  50% { 
    opacity: 0.7; 
    transform: scale(1.2); 
  }
}

.code-badge {
  padding: 3px 10px;
  border-radius: 6px;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.code-badge:hover {
  transform: scale(1.05);
}

.code-badge.javascript,
.code-badge.jsx { 
  background: linear-gradient(135deg, #f7df1e, #f0db4f); 
  color: #000; 
  box-shadow: 0 2px 8px rgba(247, 223, 30, 0.3);
}

.code-badge.typescript,
.code-badge.tsx { 
  background: linear-gradient(135deg, #3178c6, #2b6cb0); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(49, 120, 198, 0.3);
}

.code-badge.python { 
  background: linear-gradient(135deg, #3776ab, #ffd43b); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(55, 118, 171, 0.3);
}

.code-badge.markup { 
  background: linear-gradient(135deg, #e34c26, #f06529); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(227, 76, 38, 0.3);
}

.code-badge.css,
.code-badge.scss,
.code-badge.sass { 
  background: linear-gradient(135deg, #264de4, #3b82f6); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(38, 77, 228, 0.3);
}

.code-badge.json { 
  background: linear-gradient(135deg, #292929, #404040); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(41, 41, 41, 0.3);
}

.code-badge.markdown { 
  background: linear-gradient(135deg, #083fa1, #0d47a1); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(8, 63, 161, 0.3);
}

.code-badge.bash { 
  background: linear-gradient(135deg, #4eaa25, #5cb85c); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(78, 170, 37, 0.3);
}

.code-badge.text { 
  background: linear-gradient(135deg, #6b7280, #9ca3af); 
  color: #fff;
  box-shadow: 0 2px 8px rgba(107, 114, 128, 0.3);
}

.code-lines,
.code-size {
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  white-space: nowrap;
}

.code-lines::before {
  content: '📝';
  font-size: var(--text-xs);
}

.code-size::before {
  content: '💾';
  font-size: var(--text-xs);
}

.code-copy-btn {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  font-weight: 500;
  font-family: var(--font-sans);
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  white-space: nowrap;
  min-height: 32px;
}

.code-copy-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.code-copy-btn svg {
  position: relative;
  z-index: 1;
  transition: var(--transition-fast);
}

.code-copy-btn:hover {
  background: var(--bg-tertiary);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.code-copy-btn:hover svg {
  transform: scale(1.15) rotate(5deg);
}

.code-copy-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.code-copy-btn.copied {
  background: var(--success);
  border-color: var(--success);
  color: white;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.code-copy-btn.copied::before {
  opacity: 1;
  background: var(--success);
}

@keyframes checkmark {
  0% { 
    transform: scale(0) rotate(0deg); 
    opacity: 0; 
  }
  50% { 
    transform: scale(1.2) rotate(180deg); 
    opacity: 1; 
  }
  100% { 
    transform: scale(1) rotate(360deg); 
    opacity: 1; 
  }
}

.code-copy-btn.copied svg {
  animation: checkmark 0.4s ease;
}

[data-theme="dark"] .code-copy-btn {
  background: var(--bg-tertiary);
  border-color: var(--gray-600);
  color: var(--text-secondary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .code-copy-btn:hover {
  background: var(--gray-700);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.code-body {
  padding: 0;
  overflow: auto;
  background: var(--bg-primary);
  max-height: 600px;
  position: relative;
}

.code-body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  opacity: 0.5;
}

.code-body pre {
  margin: 0 !important;
  padding: var(--space-6) !important;
  border-radius: 0 !important;
  background: transparent !important;
  font-family: var(--font-mono) !important;
  font-size: clamp(0.75rem, 2vw, 0.9rem) !important;
  line-height: 1.7 !important;
}

.code-body code {
  background: none !important;
  padding: 0 !important;
  border-radius: 0 !important;
  font-family: inherit !important;
  text-shadow: none !important;
}

.line-numbers .line-numbers-rows {
  border-right: 1px solid var(--border-color) !important;
  padding-right: 0.5rem !important;
  margin-right: 0.75rem !important;
}

.line-numbers-rows > span:before {
  color: var(--text-muted) !important;
  font-size: 0.85rem !important;
}

.code-body::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

.code-body::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 6px;
}

.code-body::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 6px;
  border: 2px solid var(--bg-secondary);
}

.code-body::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--primary-dark), var(--primary));
}

@keyframes slideInCode {
  from { 
    opacity: 0; 
    transform: translateY(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

.toolbar {
  display: none;
}

.markdown-content {
  font-family: var(--font-sans);
  line-height: 1.7;
  color: var(--text-primary);
  max-width: none;
  padding: var(--space-5);
  animation: slideInCode 0.4s ease;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.3;
}

.markdown-content h1 {
  font-size: var(--text-3xl);
  border-bottom: 3px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.markdown-content h2 {
  font-size: var(--text-2xl);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.markdown-content h3 {
  font-size: var(--text-xl);
}

.markdown-content p {
  margin-bottom: var(--space-4);
  line-height: 1.8;
  font-size: var(--text-base);
}

.markdown-content pre {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--space-5);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  margin: var(--space-4) 0;
}

.markdown-content code {
  background: var(--bg-secondary);
  padding: 3px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--primary-color);
  font-weight: 500;
}

.markdown-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: var(--space-6);
  margin: var(--space-6) 0;
  color: var(--text-secondary);
  font-style: italic;
  background: var(--bg-secondary);
  padding: var(--space-4) var(--space-6);
  border-radius: 0 8px 8px 0;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.markdown-content th,
.markdown-content td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.markdown-content th {
  background: var(--bg-secondary);
  font-weight: 600;
}

.loading-tree {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--text-secondary);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-4);
}

.code-explorer-container.fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  height: 100vh !important;
  border-radius: 0;
  grid-template-columns: 350px 1fr;
  background: var(--bg-primary);
}

.fullscreen-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 9998;
  animation: fadeIn 0.3s ease;
}

.fullscreen-backdrop.active {
  display: block;
}

.node-header[data-type="markdown"] .node-icon {
  color: #06b6d4;
}

.node-header[data-type="javascript"] .node-icon {
  color: #f59e0b;
}

.node-header[data-type="python"] .node-icon {
  color: #10b981;
}

.node-header[data-type="markup"] .node-icon {
  color: #f97316;
}

.node-header[data-type="css"] .node-icon {
  color: #3b82f6;
}

.node-header[data-type="json"] .node-icon {
  color: #8b5cf6;
}

[data-theme="dark"] .code-header {
  background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--gray-800) 100%);
}

[data-theme="dark"] .code-filename::before {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

[data-theme="dark"] .code-lines,
[data-theme="dark"] .code-size {
  background: var(--gray-800);
}

[data-theme="light"] .code-body {
  background: #f5f7fa;
}

[data-theme="light"] .code-body::before {
  opacity: 0.3;
}

[data-theme="light"] .code-body::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #cbd5e1, #94a3b8);
}

/* Enhanced scroll animations */
.scroll-animate {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.scroll-fade-in {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.scroll-fade-in.animate-in {
  opacity: 1;
}

.scroll-slide-up {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.scroll-slide-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-slide-left.animate-in {
  opacity: 1;
  transform: translateX(0);
}

.scroll-slide-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-slide-right.animate-in {
  opacity: 1;
  transform: translateX(0);
}

.scroll-zoom-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-zoom-in.animate-in {
  opacity: 1;
  transform: scale(1);
}

/* Staggered animation delays */
.scroll-animate:nth-child(1) { transition-delay: 0s; }
.scroll-animate:nth-child(2) { transition-delay: 0.1s; }
.scroll-animate:nth-child(3) { transition-delay: 0.2s; }
.scroll-animate:nth-child(4) { transition-delay: 0.3s; }
.scroll-animate:nth-child(5) { transition-delay: 0.4s; }
.scroll-animate:nth-child(6) { transition-delay: 0.5s; }
.scroll-animate:nth-child(7) { transition-delay: 0.6s; }
.scroll-animate:nth-child(8) { transition-delay: 0.7s; }
.scroll-animate:nth-child(9) { transition-delay: 0.8s; }

.section-header,
.section-title,
.section-subtitle {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-header.animate-in,
.section-title.animate-in,
.section-subtitle.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.skill-card,
.project-card,
.contact-item,
.stat-item,
.profile-card {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.skill-card.animate-in,
.project-card.animate-in,
.contact-item.animate-in,
.stat-item.animate-in,
.profile-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.skills-grid .skill-card:nth-child(1) { transition-delay: 0s; }
.skills-grid .skill-card:nth-child(2) { transition-delay: 0.1s; }
.skills-grid .skill-card:nth-child(3) { transition-delay: 0.2s; }
.skills-grid .skill-card:nth-child(4) { transition-delay: 0.3s; }
.skills-grid .skill-card:nth-child(5) { transition-delay: 0.4s; }
.skills-grid .skill-card:nth-child(6) { transition-delay: 0.5s; }

.projects-grid .project-card:nth-child(1) { transition-delay: 0s; }
.projects-grid .project-card:nth-child(2) { transition-delay: 0.15s; }
.projects-grid .project-card:nth-child(3) { transition-delay: 0.3s; }
.projects-grid .project-card:nth-child(4) { transition-delay: 0.45s; }
.projects-grid .project-card:nth-child(5) { transition-delay: 0.6s; }
.projects-grid .project-card:nth-child(6) { transition-delay: 0.75s; }

.stats-grid .stat-item:nth-child(1) { transition-delay: 0s; }
.stats-grid .stat-item:nth-child(2) { transition-delay: 0.1s; }
.stats-grid .stat-item:nth-child(3) { transition-delay: 0.2s; }

/* About animations */
.about-text,
.about-image {
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.about-text {
  transform: translateX(-50px);
}

.about-image {
  transform: translateX(50px);
}

.about-text.animate-in,
.about-image.animate-in {
  opacity: 1;
  transform: translateX(0);
}

/* Contact animations */
.contact-form,
.contact-info {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.contact-form.animate-in,
.contact-info.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Utility classes */
.hidden { 
  display: none !important; 
}

.sr-only { 
  position: absolute; 
  width: 1px; 
  height: 1px; 
  padding: 0; 
  margin: -1px; 
  overflow: hidden; 
  clip: rect(0, 0, 0, 0); 
  white-space: nowrap; 
  border: 0; 
}

/* Responsive design improvements */

/* Extra small devices (phones, 375px and down) */
@media (max-width: 375px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }
  
  .btn {
    width: 100%;
    justify-content: center;
    padding: var(--space-3) var(--space-4);
  }
  
  .code-badge {
    font-size: var(--text-xs);
    padding: 2px 6px;
  }
  
  .code-lines::before,
  .code-size::before {
    display: none;
  }
  
  .project-filters {
    gap: var(--space-2);
  }
  
  .filter-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
  
  .modal-content {
    max-width: 95vw;
    height: 85vh;
    margin: var(--space-2);
  }
  
  .code-explorer-container.fullscreen {
    grid-template-columns: 1fr;
  }
  
  .panel-header {
    padding: var(--space-3) var(--space-4);
  }
  
  .file-path {
    max-width: 150px;
  }
}

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767px) {
  .nav-container {
    padding: var(--space-3) var(--space-4);
  }
  
  .hero-content {
    gap: var(--space-8);
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .code-explorer-container {
    grid-template-columns: 1fr;
    height: auto;
  }
  
  .file-tree-panel {
    height: 300px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991px) {
  .nav-links {
    gap: var(--space-4);
  }
  
  .hero-content,
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-10);
    text-align: center;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .code-explorer-container {
    grid-template-columns: 280px 1fr;
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) and (max-width: 1199px) {
  .nav-container {
    padding: var(--space-4) var(--space-6);
  }
  
  .hero-content,
  .about-content,
  .contact-content {
    gap: var(--space-12);
  }
  
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  .nav-container {
    padding: var(--space-4) var(--space-8);
  }
  
  .hero-content,
  .about-content,
  .contact-content {
    gap: var(--space-16);
  }
  
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Mobile-first navigation improvements */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 90vw);
    height: 100vh;
    background: var(--bg-primary);
    border-left: 1px solid var(--gray-200);
    flex-direction: column;
    padding: clamp(5rem, 15vh, 8rem) var(--space-6) var(--space-6);
    transform: translateX(100%);
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
    z-index: 99;
    overflow-y: auto;
    gap: var(--space-6);
  }
  
  [data-theme="dark"] .nav-links {
    border-left-color: var(--gray-700);
  }
  
  .nav-links.active {
    transform: translateX(0);
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  .hero-section {
    padding: clamp(4rem, 15vh, 8rem) var(--space-4);
    text-align: center;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .hero-subtitle {
    max-width: 100%;
  }

  .section {
    padding: clamp(3rem, 8vh, 5rem) var(--space-4);
  }
  
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-8);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .code-explorer-container {
    grid-template-columns: 1fr;
    height: auto;
    max-height: 80vh;
  }
  
  .file-tree-panel {
    height: min(300px, 40vh);
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .file-viewer-panel {
    height: min(400px, 50vh);
  }
  
  .code-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4);
  }
  
  .code-header-left,
  .code-header-right {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  
  .code-copy-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
  
  .social-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: var(--space-6);
  }
  
  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-4);
  }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .hero-graphic,
  .avatar,
  .skill-icon {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Landscape orientation optimizations */
@media (orientation: landscape) and (max-height: 500px) {
  .hero-section {
    min-height: 100vh;
    padding: var(--space-8) var(--space-4);
  }
  
  .hero-content {
    gap: var(--space-6);
  }
  
  .nav-container {
    min-height: 60px;
  }
}

/* Dark mode specific responsive adjustments */
[data-theme="dark"] {
  @media (max-width: 768px) {
    .code-header {
      background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--gray-800) 100%);
    }
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .skill-card:hover,
  .project-card:hover,
  .btn:hover,
  .action-btn:hover {
    transform: none;
  }
  
  .skill-card:active,
  .project-card:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
  }
  
  .btn:active {
    transform: scale(0.95);
  }
  
  .nav-links a,
  .theme-toggle,
  .mobile-toggle,
  .btn,
  .action-btn,
  .filter-btn {
    min-height: 44px;
    min-width: 44px;
  }
}

/* Print styles */
@media print {
  .modern-header,
  .mobile-toggle,
  .theme-toggle,
  .nav-actions,
  .floating-shapes,
  .scroll-indicator,
  .code-copy-btn,
  .action-btn {
    display: none !important;
  }
  
  .hero-section,
  .section {
    padding: var(--space-8) 0;
  }
  
  .hero-content,
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .code-body {
    max-height: none;
    overflow: visible;
  }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .scroll-animate,
  .scroll-fade-in,
  .scroll-slide-up,
  .scroll-slide-left,
  .scroll-slide-right,
  .scroll-zoom-in,
  .section-header,
  .section-title,
  .section-subtitle,
  .skill-card,
  .project-card,
  .contact-item,
  .stat-item,
  .profile-card,
  .about-text,
  .about-image,
  .contact-form,
  .contact-info {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  
  .shape,
  .floating-shapes * {
    animation: none !important;
  }
}

/* Focus styles for accessibility */
.btn:focus,
.nav-links a:focus,
.theme-toggle:focus,
.mobile-toggle:focus,
.action-btn:focus,
.filter-btn:focus,
.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 10000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 6px;
}