/* Modern Portfolio CSS with Dark/Light Theme Support */

/* CSS Custom Properties for Theming */
:root {
  /* Dark Theme Colors (Default) */
  --primary-color: #00bcd4;
  --primary-light: #4dd0e1;
  --primary-dark: #008ba3;
  
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --bg-card: #1e1e1e;
  
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #808080;
  
  --border-color: #333333;
  --shadow-color: rgba(0, 0, 0, 0.3);
  
  /* Common Colors */
  --success-color: #28a745;
  --error-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #17a2b8;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-secondary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px var(--shadow-color);
  --shadow-md: 0 4px 6px var(--shadow-color);
  --shadow-lg: 0 10px 15px var(--shadow-color);
  --shadow-xl: 0 20px 25px var(--shadow-color);
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --bg-card: #ffffff;
  
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #6c757d;
  
  --border-color: #dee2e6;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

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

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

body.loaded {
  opacity: 1;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity var(--transition-normal);
}

.loader {
  width: 50px;
  height: 50px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-lg);
}

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

.loading-screen p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-normal);
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.95);
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.98);
  box-shadow: var(--shadow-lg);
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-logo:hover {
  transform: scale(1.05);
}

.logo-img {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-color);
  box-shadow: 0 0 15px rgba(0, 188, 212, 0.3);
  transition: all var(--transition-fast);
}

.logo-img:hover {
  border-color: var(--primary-light);
  box-shadow: 0 0 20px rgba(0, 188, 212, 0.5);
  transform: rotate(5deg);
}

.logo-text {
  font-family: var(--font-secondary);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  text-shadow: 0 0 10px rgba(0, 188, 212, 0.3);
  transition: all var(--transition-fast);
}

.logo-text:hover {
  color: var(--primary-light);
  text-shadow: 0 0 15px rgba(0, 188, 212, 0.5);
}

/* Alternative: Text-only logo with creative styling */
.nav-logo.text-only {
  gap: var(--spacing-md);
}

.nav-logo.text-only .logo-text {
  font-size: 2rem;
  background: linear-gradient(45deg, var(--primary-color), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.nav-logo.text-only .logo-text::before {
  content: '🚀';
  font-size: 1.5rem;
  margin-right: var(--spacing-sm);
  animation: bounce 2s infinite;
}

.nav-logo.text-only .logo-text::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.nav-logo.text-only:hover .logo-text::after {
  transform: scaleX(1);
}

/* Alternative: Icon-based logo */
.nav-logo.icon-only {
  gap: var(--spacing-md);
}

.nav-logo.icon-only .logo-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  box-shadow: 0 0 20px rgba(0, 188, 212, 0.4);
  transition: all var(--transition-normal);
  animation: pulse 2s infinite;
}

.nav-logo.icon-only .logo-icon:hover {
  transform: scale(1.1) rotate(10deg);
  box-shadow: 0 0 30px rgba(0, 188, 212, 0.6);
}

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

/* Alternative: Minimalist text logo */
.nav-logo.minimalist .logo-text {
  font-size: 1.6rem;
  font-weight: 300;
  letter-spacing: 2px;
  color: var(--text-primary);
  position: relative;
}

.nav-logo.minimalist .logo-text::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary-color);
  transition: width var(--transition-normal);
}

.nav-logo.minimalist:hover .logo-text::after {
  width: 100%;
}

/* Alternative: Creative geometric logo */
.nav-logo.geometric {
  gap: var(--spacing-md);
}

.nav-logo.geometric .logo-shape {
  width: 40px;
  height: 40px;
  background: var(--primary-color);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  transition: all var(--transition-normal);
  animation: rotate 10s linear infinite;
}

.nav-logo.geometric:hover .logo-shape {
  background: var(--primary-light);
  transform: scale(1.2) rotate(180deg);
}

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

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

.nav-link {
  color: var(--text-primary) !important;
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
  /* Force visibility */
  opacity: 1 !important;
  visibility: visible !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-normal);
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color) !important;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.theme-toggle,
.nav-toggle {
  background: none;
  border: none;
  color: var(--text-primary) !important;
  font-size: 1.2rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  /* Force visibility */
  opacity: 1 !important;
  visibility: visible !important;
}

.theme-toggle:hover,
.nav-toggle:hover {
  background: var(--bg-secondary);
  color: var(--primary-color) !important;
}

.nav-toggle {
  display: none;
}

.hamburger {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: all var(--transition-fast);
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  bottom: -6px;
}

.nav-toggle.active .hamburger {
  background: transparent;
}

.nav-toggle.active .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle.active .hamburger::after {
  transform: rotate(-45deg);
  bottom: 0;
}

/* Force navigation text visibility in both themes */
[data-theme="dark"] .nav-link,
[data-theme="dark"] .theme-toggle,
[data-theme="dark"] .nav-toggle {
  color: #ffffff !important;
}

[data-theme="light"] .nav-link,
[data-theme="light"] .theme-toggle,
[data-theme="light"] .nav-toggle {
  color: #1a1a1a !important;
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
  color: var(--primary-color) !important;
}

[data-theme="light"] .nav-link:hover,
[data-theme="light"] .nav-link.active {
  color: var(--primary-color) !important;
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .nav-toggle:hover {
  color: var(--primary-color) !important;
}

[data-theme="light"] .theme-toggle:hover,
[data-theme="light"] .nav-toggle:hover {
  color: var(--primary-color) !important;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('Images/background.jpg') center/cover;
  opacity: 0.1;
  z-index: 1;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  animation: fadeInLeft 1s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(0, 188, 212, 0.1);
  color: var(--primary-color);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  border: 1px solid rgba(0, 188, 212, 0.2);
}

.hero-title {
  font-family: var(--font-secondary);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  color: var(--primary-color);
  background: linear-gradient(45deg, var(--primary-color), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-md);
}

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

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

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

.hero-visual {
  position: relative;
  height: 400px;
}

.floating-card {
  position: absolute;
  background: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  animation: float 6s ease-in-out infinite;
  border: 1px solid var(--border-color);
}

.floating-card:nth-child(1) {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.floating-card:nth-child(2) {
  top: 50%;
  right: 20%;
  animation-delay: 2s;
}

.floating-card:nth-child(3) {
  bottom: 20%;
  left: 30%;
  animation-delay: 4s;
}

.floating-card i {
  font-size: 2rem;
  color: var(--primary-color);
}

.floating-card span {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 2px;
  height: 30px;
  background: var(--primary-color);
  position: relative;
}

.scroll-arrow::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: -3px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
  transform: rotate(45deg);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* Container and Section Styles */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-family: var(--font-secondary);
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.about-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
}

.image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  padding: var(--spacing-xl);
  color: white;
}

.stats {
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.about-text h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.about-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

.skills-showcase {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.skill-tag {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  font-weight: 500;
}

.tab-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.tab-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
}

.tab-btn:hover,
.tab-btn.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.tab-btn i {
  margin-right: var(--spacing-sm);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

/* Skills Tab */
.skill-item {
  margin-bottom: var(--spacing-lg);
}

.skill-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.skill-name {
  font-weight: 500;
  color: var(--text-primary);
}

.skill-level {
  color: var(--primary-color);
  font-weight: 600;
}

.skill-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-sm);
  transition: width 1s ease;
}

/* Experience Tab */
.timeline {
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-color);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-xl);
  padding-left: 60px;
}

.timeline-marker {
  position: absolute;
  left: 11px;
  top: 0;
  width: 20px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 50%;
  border: 4px solid var(--bg-card);
}

.timeline-content h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

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

.timeline-date {
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 500;
}

/* Education Tab */
.education-item {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
}

.education-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.education-content h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

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

.education-year {
  color: var(--primary-color);
  font-size: 0.9rem;
  font-weight: 500;
}

/* Services Section */
.services {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-primary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.service-card {
  background: var(--bg-card);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  color: white;
  font-size: 2rem;
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.service-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
  flex-grow: 1;
}

.service-features {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.service-features li {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-lg);
  position: relative;
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

.service-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.service-btn:hover {
  color: var(--primary-light);
  transform: translateX(5px);
}

/* Portfolio Section */
.portfolio {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-secondary);
}

.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-3xl);
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.portfolio-item {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.portfolio-item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.portfolio-image {
  position: relative;
  overflow: hidden;
}

.portfolio-image img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.portfolio-item:hover .portfolio-image img {
  transform: scale(1.1);
}

.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-links {
  display: flex;
  gap: var(--spacing-md);
}

.portfolio-link,
.portfolio-info {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.portfolio-link:hover,
.portfolio-info:hover {
  background: var(--primary-light);
  transform: scale(1.1);
}

.portfolio-content {
  padding: var(--spacing-xl);
}

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

.portfolio-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

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

.tag {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
}

/* Contact Section */
.contact {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-primary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-details h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.contact-details a,
.contact-details span {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-details a:hover {
  color: var(--primary-color);
}

.social-links h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.social-icons {
  display: flex;
  gap: var(--spacing-lg);
}

.social-icons a {
  width: 50px;
  height: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-icons a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

/* Contact Form */
.contact-form {
  background: var(--bg-card);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: var(--bg-secondary);
}

.form-group label {
  position: absolute;
  left: var(--spacing-lg);
  top: var(--spacing-lg);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  pointer-events: none;
  background: var(--bg-card);
  padding: 0 var(--spacing-xs);
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
  top: var(--spacing-sm);
  left: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--primary-color);
  background: var(--bg-card);
  padding: 0 var(--spacing-xs);
}

/* Ensure labels are visible when inputs have content */
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: var(--spacing-sm);
  left: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--primary-color);
  background: var(--bg-card);
  padding: 0 var(--spacing-xs);
}

.error-message {
  color: var(--error-color);
  font-size: 0.9rem;
  margin-top: var(--spacing-sm);
  display: block;
}

.form-group.error input,
.form-group.error textarea {
  border-color: var(--error-color);
}

/* Button Loading States */
.btn-loading {
  display: none;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.footer-brand p {
  color: var(--text-secondary);
}

.footer-links h4,
.footer-services h4,
.footer-contact h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.footer-links ul,
.footer-services ul {
  list-style: none;
}

.footer-links li,
.footer-services li {
  margin-bottom: var(--spacing-sm);
}

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

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-contact p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.footer-bottom p {
  margin-bottom: var(--spacing-sm);
}

.footer-bottom i {
  color: var(--error-color);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal.show {
  display: flex;
  opacity: 1;
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  max-width: 800px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.7);
  transition: transform var(--transition-normal);
}

.modal.show .modal-content {
  transform: scale(1);
}

.close-modal {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: 2rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
  z-index: 1;
}

.close-modal:hover {
  color: var(--error-color);
}

.project-modal-content {
  padding: var(--spacing-2xl);
}

.project-image {
  margin-bottom: var(--spacing-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: auto;
}

.project-details h2 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.project-details p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

.project-tech h4,
.project-features h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.tech-tag {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.project-features ul {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.project-features li {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-lg);
  position: relative;
}

.project-features li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-normal);
  z-index: 1000;
}

.back-to-top.show {
  display: flex;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-5px);
}

/* Notifications */
.notification {
  position: fixed;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--bg-card);
  color: var(--text-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  z-index: 3000;
  transform: translateX(400px);
  transition: transform var(--transition-normal);
  border-left: 4px solid var(--primary-color);
}

.notification.show {
  transform: translateX(0);
}

.notification-success {
  border-left-color: var(--success-color);
}

.notification-error {
  border-left-color: var(--error-color);
}

.notification-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.2rem;
  margin-left: auto;
}

.notification-close:hover {
  color: var(--text-primary);
}

/* Animations */
@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

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

/* AOS Animations */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

/* Keyboard Navigation */
.keyboard-navigation *:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 250px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 80px;
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-xl);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-2xl);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-visual {
    display: none;
  }
  
  .section-title {
    font-size: 2.5rem;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .tab-buttons {
    flex-direction: column;
  }
  
  .portfolio-filters {
    flex-direction: column;
    align-items: center;
  }
  
  .modal-content {
    width: 95%;
    margin: var(--spacing-md);
  }
  
  .notification {
    right: var(--spacing-md);
    left: var(--spacing-md);
    transform: translateY(-100px);
  }
  
  .notification.show {
    transform: translateY(0);
  }
}

/* Ensure all text elements are visible */
.nav-link,
.nav-link:hover,
.nav-link.active,
.nav-link::after,
.theme-toggle,
.nav-toggle,
.hero-title,
.hero-description,
.section-title,
.section-subtitle,
.about-text h3,
.about-text p,
.skill-name,
.skill-level,
.timeline-content h4,
.timeline-content p,
.timeline-date,
.education-content h4,
.education-content p,
.education-year,
.service-card h3,
.service-card p,
.service-features li,
.portfolio-content h3,
.portfolio-content p,
.contact-details h4,
.contact-details a,
.contact-details span,
.social-links h4,
.footer-brand h3,
.footer-brand p,
.footer-links h4,
.footer-services h4,
.footer-contact h4,
.footer-links a,
.footer-services li,
.footer-contact p,
.footer-bottom p {
  text-shadow: none;
}

/* Ensure proper contrast for all text elements */
.nav-link,
.nav-link:hover,
.nav-link.active,
.theme-toggle,
.nav-toggle,
.hero-title,
.hero-description,
.section-title,
.section-subtitle,
.about-text h3,
.about-text p,
.skill-name,
.skill-level,
.timeline-content h4,
.timeline-content p,
.timeline-date,
.education-content h4,
.education-content p,
.education-year,
.service-card h3,
.service-card p,
.service-features li,
.portfolio-content h3,
.portfolio-content p,
.contact-details h4,
.contact-details a,
.contact-details span,
.social-links h4,
.footer-brand h3,
.footer-brand p,
.footer-links h4,
.footer-services h4,
.footer-contact h4,
.footer-links a,
.footer-services li,
.footer-contact p,
.footer-bottom p {
  text-shadow: none;
}

/* Ensure proper spacing for mobile navigation */
@media (max-width: 768px) {
  .nav-menu {
    background: var(--bg-secondary);
    box-shadow: var(--shadow-xl);
  }
  
  .nav-menu .nav-link {
    color: var(--text-primary);
    padding: var(--spacing-md);
    width: 100%;
    text-align: center;
  }
  
  .nav-menu .nav-link:hover,
  .nav-menu .nav-link.active {
    color: var(--primary-color);
    background: var(--bg-tertiary);
  }
}

/* Alternative: Code-themed Logo */
.nav-logo.code-themed {
  gap: var(--spacing-md);
}

.nav-logo.code-themed .logo-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  color: white;
  box-shadow: 0 0 20px rgba(0, 188, 212, 0.4);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.nav-logo.code-themed .logo-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left var(--transition-slow);
}

.nav-logo.code-themed:hover .logo-icon::before {
  left: 100%;
}

.nav-logo.code-themed:hover .logo-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 0 30px rgba(0, 188, 212, 0.6);
}

/* Enhanced Image Logo Styles */
.nav-logo:not(.text-only):not(.icon-only):not(.minimalist):not(.geometric):not(.code-themed) .logo-img {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-color);
  box-shadow: 0 0 15px rgba(0, 188, 212, 0.3);
  transition: all var(--transition-fast);
}

.nav-logo:not(.text-only):not(.icon-only):not(.minimalist):not(.geometric):not(.code-themed) .logo-img:hover {
  border-color: var(--primary-light);
  box-shadow: 0 0 20px rgba(0, 188, 212, 0.5);
  transform: rotate(5deg);
}

/* Responsive Logo Adjustments */
@media (max-width: 768px) {
  .nav-logo {
    gap: var(--spacing-sm);
  }
  
  .logo-img {
    width: 40px;
    height: 40px;
  }
  
  .logo-text {
    font-size: 1.5rem;
  }
  
  .nav-logo.text-only .logo-text {
    font-size: 1.8rem;
  }
  
  .nav-logo.icon-only .logo-icon {
    width: 45px;
    height: 45px;
    font-size: 1.6rem;
  }
  
  .nav-logo.geometric .logo-shape {
    width: 35px;
    height: 35px;
  }
  
  .nav-logo.code-themed .logo-icon {
    width: 45px;
    height: 45px;
    font-size: 1.3rem;
  }
}

@media (max-width: 480px) {
  .nav-logo {
    gap: var(--spacing-xs);
  }
  
  .logo-img {
    width: 35px;
    height: 35px;
  }
  
  .logo-text {
    font-size: 1.3rem;
  }
  
  .nav-logo.text-only .logo-text {
    font-size: 1.5rem;
  }
  
  .nav-logo.icon-only .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }
  
  .nav-logo.geometric .logo-shape {
    width: 30px;
    height: 30px;
  }
  
  .nav-logo.code-themed .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }
}