/* Modern Portfolio CSS with Dark Mode Support */

/* CSS Custom Properties for Theme Management */
:root {
  /* Light Theme Colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #06b6d4;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --background-primary: #ffffff;
  --background-secondary: #f8fafc;
  --background-tertiary: #f1f5f9;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Typography */
  --font-primary: 'Source Sans Pro', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Baskervville', 'Times New Roman', 'Times', serif;
  --font-serif: 'Baskervville', 'Playfair Display', 'Crimson Text', 'Times New Roman', 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: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --secondary-color: #94a3b8;
  --accent-color: #06b6d4;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --background-primary: #0f172a;
  --background-secondary: #1e293b;
  --background-tertiary: #334155;
  --border-color: #475569;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
}

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

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

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

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

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

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.95);
}

.nav-container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: 70px;
}

.nav-logo {
  flex: 0 0 auto;
  margin-right: auto;
}

.nav-logo a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-xl);
  margin-left: auto;
}

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

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

.nav-link.active {
  color: var(--primary-color);
  background-color: var(--background-secondary);
}

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

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--background-secondary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.hamburger {
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  display: block;
  position: relative;
  transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  position: absolute;
  transition: all var(--transition-fast);
}

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

.hamburger::after {
  top: 8px;
}

/* Hero Section */
.masthead {
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, var(--background-primary) 0%, var(--background-secondary) 100%);
  overflow: hidden;
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: var(--background-primary);
  z-index: 1;
}

.masthead .row {
  position: relative;
  z-index: 2;
}

.masthead .col-lg-12 {
  position: relative;
  z-index: 3;
}

.name {
  font-size: 4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.hero-subtitle {
  font-size: 1.75rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  text-align: center;
  background: rgba(255, 255, 255, 0.95);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  display: inline-block;
  position: relative;
  z-index: 10;
}

[data-theme="dark"] .hero-subtitle {
  background: rgba(15, 23, 42, 0.95);
}

.hero-name {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 700;
  color: #d97706;
  margin-bottom: var(--spacing-xl);
  text-align: left;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 10;
  background: linear-gradient(135deg, #d97706, #f59e0b, #eab308);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: nameGlow 3s ease-in-out infinite alternate;
}

@keyframes nameGlow {
  0% {
    filter: drop-shadow(0 0 5px rgba(217, 119, 6, 0.3));
  }
  100% {
    filter: drop-shadow(0 0 15px rgba(217, 119, 6, 0.6));
  }
}

[data-theme="dark"] .hero-name {
  background: linear-gradient(135deg, #f59e0b, #fbbf24, #fde047);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .hero-name {
  animation: nameGlowDark 3s ease-in-out infinite alternate;
}

@keyframes nameGlowDark {
  0% {
    filter: drop-shadow(0 0 5px rgba(245, 158, 11, 0.4));
  }
  100% {
    filter: drop-shadow(0 0 20px rgba(245, 158, 11, 0.8));
  }
}

/* About Me Content Styling */
.about-me-content {
  max-width: 100%;
  margin: 0 auto;
  text-align: left;
  padding: 0 var(--spacing-lg);
  position: relative;
}

.profile-image-container {
  float: right;
  margin: 0 0 var(--spacing-lg) var(--spacing-xl);
  shape-outside: circle(50%);
}

.profile-image-circle {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--primary-color);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.profile-image-circle:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

[data-theme="dark"] .profile-image-circle {
  border-color: var(--primary-color-dark);
}

.hero-content {
  max-width: 100%;
  margin: 0 auto var(--spacing-xl);
  text-align: left;
  padding: 0 var(--spacing-xl);
}

.about-intro {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
  text-align: left;
  font-style: italic;
  position: relative;
  z-index: 10;
}

.about-paragraph {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
  text-align: left;
  position: relative;
  z-index: 10;
}

.about-conclusion {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
  text-align: left;
  font-weight: 500;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(59, 130, 246, 0.05));
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  position: relative;
  z-index: 10;
}

.highlight-text {
  background: linear-gradient(120deg, var(--primary-color), var(--accent-color));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
  position: relative;
}

.highlight-text::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  opacity: 0.3;
  border-radius: 1px;
}

[data-theme="dark"] .about-intro {
  color: var(--primary-color-dark);
}

[data-theme="dark"] .about-conclusion {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(37, 99, 235, 0.1));
}

[data-theme="dark"] .highlight-text {
  background: linear-gradient(120deg, var(--primary-color-dark), var(--accent-color-dark));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .highlight-text::after {
  background: linear-gradient(90deg, var(--primary-color-dark), var(--accent-color-dark));
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
  font-weight: 500;
  background: transparent;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
  backdrop-filter: none;
  position: relative;
  z-index: 10;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 10;
}

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

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

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

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

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-arrow {
  width: 30px;
  height: 30px;
  border: 2px solid var(--text-muted);
  border-top: none;
  border-right: none;
  transform: rotate(-45deg);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0) rotate(-45deg);
  }
  40% {
    transform: translateY(-10px) rotate(-45deg);
  }
  60% {
    transform: translateY(-5px) rotate(-45deg);
  }
}

/* Typewriter Animation */
  .text_1 {
    overflow: hidden;
    white-space: nowrap;
  animation: typewriter 3s steps(20, end) infinite;
    display: inline-block;
    position: relative;
  }
  
  .text_1::after {
    content: "|";
    position: absolute;
    right: 0;
  animation: caret 1s infinite;
}

@keyframes typewriter {
  0%, 100% { width: 0; }
  20%, 80% { width: 20ch; }
}

@keyframes caret {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

/* Section Styles */
section {
  padding: var(--spacing-3xl) 0;
}

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

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

.section-title::after {
  content: '';
    position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: var(--radius-sm);
}

/* About Section */
.about-section {
  background-color: var(--background-secondary);
}

.about-intro {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.about-details,
.about-passion {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--background-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-5px);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Experience Section */
.experience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.experience-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.experience-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.experience-header {
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.company-logo {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: var(--spacing-xs);
}

.logo-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.experience-title-section {
  flex: 1;
}

.experience-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.experience-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}

.experience-company {
  font-weight: 500;
  color: var(--primary-color);
  font-size: 1.375rem;
}

.experience-date {
  color: var(--text-secondary);
  font-size: 1.125rem;
  background: var(--bg-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.experience-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  font-size: 1.25rem;
}

.experience-achievements {
  list-style: none;
  padding: 0;
  font-family: var(--font-primary);
}

.experience-achievements li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  line-height: 1.5;
  font-family: var(--font-primary);
  font-size: 1.125rem;
}

.experience-achievements li::before {
  content: "✓";
    position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

[data-theme="dark"] .experience-card {
  background: var(--bg-card-dark);
  border-color: var(--border-color-dark);
}

[data-theme="dark"] .experience-date {
  background: var(--bg-primary-dark);
}

/* Skills Section */
.skills-section {
  background-color: var(--background-secondary);
}

.skill-category {
  margin-bottom: var(--spacing-2xl);
}

.skill-category-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.skill-item {
  margin-bottom: var(--spacing-lg);
}

.skill-name {
  display: block;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

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

.skill-progress {
    height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: var(--radius-sm);
  transition: width 1s ease-in-out;
  width: 0;
}

/* Projects Section */
.projects-section {
  padding: var(--spacing-3xl) 0;
  background: var(--background-secondary);
}

.projects-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.project-card {
  background: var(--background-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  border: 2px solid var(--border-color);
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  opacity: 0.8;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
  border-color: var(--primary-color);
}

.project-card:hover::before {
  opacity: 1;
  height: 6px;
}

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

.project-category {
    display: inline-block;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-md);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.project-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-family: 'Baskervville', serif;
  line-height: 1.3;
}

.project-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  font-size: 1rem;
}

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

.tech-tag {
  background: linear-gradient(135deg, var(--background-tertiary), rgba(37, 99, 235, 0.1));
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  border: 2px solid var(--primary-color);
  transition: all 0.2s ease;
}

.tech-tag:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

.project-actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

.project-actions .btn-outline {
  background: linear-gradient(135deg, transparent, rgba(37, 99, 235, 0.05));
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
    text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

.project-actions .btn-outline:hover {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

[data-theme="dark"] .project-card {
  background: var(--background-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .tech-tag {
  background: var(--background-tertiary);
  border-color: var(--border-color);
}

/* Publications Section */
.publications-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-primary);
}

.publications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.publication-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.publication-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.publication-image {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.publication-image img {
    width: 100%;
    height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.publication-card:hover .publication-image img {
  transform: scale(1.05);
}

.publication-content {
  padding: var(--spacing-xl);
}
    
.publication-category {
    display: inline-block;
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
    font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.publication-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.publication-authors {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
    font-style: italic;
}

.publication-year {
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  background: var(--bg-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
    display: inline-block;
}

/* Year-specific color coding */
.publication-year[data-year="2025"] {
  background: linear-gradient(135deg, #1e40af, #3b82f6);
  color: white;
}

.publication-year[data-year="2024"] {
  background: linear-gradient(135deg, #2563eb, #60a5fa);
  color: white;
}

.publication-year[data-year="2023"] {
  background: linear-gradient(135deg, #3b82f6, #93c5fd);
  color: white;
}

.publication-year[data-year="2022"] {
  background: linear-gradient(135deg, #60a5fa, #bfdbfe);
  color: #1e40af;
}

.publication-year[data-year="2019"] {
  background: linear-gradient(135deg, #93c5fd, #dbeafe);
  color: #1e40af;
}

.publication-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.publication-actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.btn-icon {
  margin-right: var(--spacing-xs);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
    text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  font-size: 0.875rem;
}

.btn-outline:hover {
  background: var(--primary-color);
    color: white;
  transform: translateY(-1px);
}

[data-theme="dark"] .publication-card {
  background: var(--bg-card-dark);
  border-color: var(--border-color-dark);
}

[data-theme="dark"] .publication-category {
  background: var(--primary-color-dark);
}

[data-theme="dark"] .publication-year {
  background: var(--bg-primary-dark);
}

/* Contact Section */
.contact-section {
  background-color: var(--background-secondary);
}

.contact-info {
  margin-bottom: var(--spacing-2xl);
}

.contact-subtitle {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.contact-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.contact-details {
  margin-bottom: var(--spacing-xl);
}

.contact-item {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.contact-icon {
  font-size: 1.25rem;
  margin-right: var(--spacing-md);
}

.contact-link {
  color: var(--primary-color);
    font-weight: 500;
}

.contact-text {
  color: var(--text-secondary);
}

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

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background-color: var(--background-primary);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

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

.social-link svg {
  width: 24px;
  height: 24px;
}

/* Form Styles */
.contact-form {
  background-color: var(--background-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

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

.form-label {
  display: block;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.form-control {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--background-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-error {
  display: block;
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

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

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-text {
  color: var(--text-muted);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-link {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--background-primary);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-2xl);
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: block;
  }

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

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

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

  .name {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.5rem;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .hero-name {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
  }

  .hero-content {
    text-align: left;
    padding: 0 var(--spacing-md);
  }

  .hero-description {
    font-size: 1rem;
    padding: 0;
  }

  .about-intro {
    font-size: 1.6rem;
    padding: 0 var(--spacing-md);
  }

  .about-intro::before,
  .about-intro::after {
    display: none;
  }

  .about-paragraph {
    font-size: 1rem;
    text-align: left;
  }

  .about-conclusion {
    font-size: 1rem;
    padding: var(--spacing-md);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .publications-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .publication-card {
    margin-bottom: var(--spacing-lg);
  }

  .publication-actions {
    flex-direction: column;
  }

  .btn-outline,
  .btn-primary {
    width: 100%;
    justify-content: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 50px;
  }

  .timeline-item:nth-child(odd) {
    flex-direction: column;
  }

  .timeline-marker {
    left: 20px;
  }

  .timeline-content {
    width: 100%;
    margin: 0;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }

  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .nav-container {
    padding: 0 var(--spacing-md);
  }

  .hero-content {
    padding: 0 var(--spacing-md);
  }

  .about-me-content {
    padding: 0 var(--spacing-md);
  }

  .experience-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-sm);
  }

  .company-logo {
    width: 40px;
    height: 40px;
  }

  .experience-title-section {
    width: 100%;
  }

  .profile-image-circle {
    width: 150px;
    height: 150px;
  }

  .name {
    font-size: 2rem;
  }

  .contact-form {
    padding: var(--spacing-lg);
  }

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

/* Animation Classes */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.6s ease-out;
}

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

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.6s ease-out;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* Print Styles */
@media print {
  .navbar,
  .scroll-indicator,
  .hero-buttons,
  .contact-form,
  .social-links {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .masthead {
    height: auto;
    padding: 2rem 0;
  }
}