/* CSS Custom Properties */
:root {
  /* Colors */
  --primary-color: #00ffff;
  --secondary-color: #00bfff;
  --accent-color: #93ff9e;
  --text-primary: #ffffff;
  --text-secondary: #d9d3d3;
  --text-muted: #dadada;
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --border-color: #333333;
  --shadow-light: rgba(0, 255, 255, 0.1);
  --shadow-dark: rgba(0, 0, 0, 0.3);

  /* Light Mode Colors */
  --light-primary-color: #0b8db9;
  --light-secondary-color: #518dac;
  --light-accent-color: #18a200;
  --light-text-primary: #2c3e50;
  --light-text-secondary: #555555;
  --light-text-muted: #afafaf;
  --light-bg-primary: #ffffff;
  --light-bg-secondary: #f8f9fa;
  --light-bg-tertiary: #e9ecef;
  --light-border-color: #dee2e6;
  --light-shadow-light: rgba(0, 153, 204, 0.1);
  --light-shadow-dark: rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* 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: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: rgba(0, 0, 0, 0.3);
  --glass-backdrop-blur: 20px;
}

/* Light Mode */
[data-theme="light"] {
  --primary-color: var(--light-primary-color);
  --secondary-color: var(--light-secondary-color);
  --accent-color: var(--light-accent-color);
  --text-primary: var(--light-text-primary);
  --text-secondary: var(--light-text-secondary);
  --text-muted: var(--light-text-muted);
  --bg-primary: var(--light-bg-primary);
  --bg-secondary: var(--light-bg-secondary);
  --bg-tertiary: var(--light-bg-tertiary);
  --border-color: var(--light-border-color);
  --shadow-light: var(--light-shadow-light);
  --shadow-dark: var(--light-shadow-dark);
  
  /* Light mode glassmorphism */
  --glass-bg: rgba(0, 0, 0, 0.1);
  --glass-border: rgba(0, 0, 0, 0.2);
  --glass-shadow: rgba(255, 255, 255, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  margin: 0;
  padding: 0;
}

/* Full-Screen Logo Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: black;
  background-image: url('/static/images/logo-background.png');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  background-attachment: fixed;
  opacity: 1;
  z-index: -2;
  pointer-events: none;
  filter: blur(10px)
}

/* Inverted colors for light mode background */
[data-theme="light"] body::before {
  background-color: white;
  filter: blur(10px) invert(1);
  opacity: 1;
  
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Glassmorphism Base Class */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px var(--glass-shadow);
}

/* Loading Screen */
.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

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

.loader-logo {
  width: 80px;
  height: 80px;
  margin-bottom: var(--spacing-md);
  filter: none;
}

[data-theme="light"] .loader-logo {
  filter: brightness(0) invert(1);
}

.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px var(--glass-shadow);
  z-index: 1000;
  transition: all var(--transition-base);
}

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

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

.nav-logo {
  width: 32px;
  height: 32px;
  filter: none;
}

[data-theme="light"] .nav-logo {
  filter: none;
}

.nav-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-base);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-base);
}

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

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

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: var(--transition-base);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  
}

.particles-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  z-index: 2;
  position: relative;
  max-width: 800px;
  padding: 0 var(--spacing-md);
}

.hero-name {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-3xl);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  min-height: 2em;
  font-weight: 700;
}

.cursor {
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-tagline {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-size: var(--font-size-base);
}

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

.btn-primary:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-light);
}

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

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 50%;
  transition: all var(--transition-base);
  font-size: var(--font-size-xl);
}

.social-link:hover {
  background: var(--primary-color);
  color: var(--bg-primary);
  transform: translateY(-3px);
}

/* Sections */
.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
  z-index: 1;
}


.section-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-2xl);
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--primary-color);
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.about-text h3,
.education h3 {
  color: var(--primary-color);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.about-text p {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.timeline {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  margin-top: var(--spacing-xl);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: var(--primary-color);
}

.timeline-item {
  position: relative;
  width: 100%;
  margin-bottom: var(--spacing-xl);
}

.timeline-item.left {
  text-align: right;
  padding-right: calc(50% + 20px);
}

.timeline-item.right {
  text-align: left;
  padding-left: calc(50% + 20px);
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  background: var(--primary-color);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.timeline-date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-xs);
}

.timeline-content h4 {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

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

.grade {
  color: var(--accent-color);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-xl);
}

.project-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow-dark);
  border-color: var(--primary-color);
}

.project-header {
  margin-bottom: var(--spacing-md);
}

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

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

.tag {
  background: var(--primary-color);
  color: var(--bg-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

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

.project-footer {
  margin-top: auto;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
}

.skills-grid-custom {
  grid-template-columns: 1fr 1fr;
}

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

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

.skill-category {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
}

.skill-category h3 {
  color: var(--primary-color);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 5fr));
  text-align: center;
  gap: var(--spacing-md);
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.skill-item:hover {
  background: var(--primary-color);
  color: var(--bg-primary);
}

.skill-item i {
  font-size: var(--font-size-lg);
}

.tech-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.tech-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px var(--glass-shadow);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.tech-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-color);
}

.tech-card h4 {
  color: var(--primary-color);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.sub-tech-list {
  list-style: none;
  padding-left: 0;
  color: var(--text-secondary);
}

.sub-tech-list > li {
  margin-bottom: var(--spacing-sm);
}

.sub-tech-list > li strong {
  color: var(--text-primary);
}

.sub-tech-list ul {
  list-style: disc;
  padding-left: var(--spacing-lg);
  margin-top: var(--spacing-xs);
}

.sub-tech-list ul li {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.programming-profiles {
  text-align: center;
}

.programming-profiles h3 {
  color: var(--primary-color);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
}

.profiles-grid {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.profile-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px var(--glass-shadow);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  min-width: 120px;
}

.profile-card:hover {
  background: var(--primary-color);
  color: var(--bg-primary);
  transform: translateY(-3px);
}

.profile-card i {
  font-size: var(--font-size-xl);
}

/* Internships Section */
.internships-grid {
  display: grid;
  gap: var(--spacing-xl);
}

.internship-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.internship-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-color);
}

.internship-header {
  margin-bottom: var(--spacing-md);
}

.internship-header h3 {
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.internship-company {
  color: var(--primary-color);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.internship-duration {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.internship-content ul {
  list-style: none;
  padding-left: 0;
}

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

.internship-content li::before {
  content: '▸';
  color: var(--primary-color);
  position: absolute;
  left: 0;
}

/* Achievements Section */
.achievements-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
}

.achievement-category {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
}

.achievement-category h3 {
  color: var(--primary-color);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.achievement-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.achievement-item {
  padding: var(--spacing-md);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.achievement-item h4 {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.achievement-item p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  max-width: 800px;
  margin: 0 auto;
}

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

.contact-item i {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-color);
  color: var(--bg-primary);
  border-radius: 50%;
  font-size: var(--font-size-lg);
}

.contact-item h4 {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

.contact-item a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-base);
}

.contact-item a:hover {
  color: var(--secondary-color);
}

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

.contact-social h4 {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

.social-links-large {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.social-links-large .social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--glass-backdrop-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  width: auto;
  height: auto;
  box-shadow: 0 4px 16px var(--glass-shadow);
}

.social-links-large .social-link:hover {
  background: var(--primary-color);
  color: var(--bg-primary);
  transform: translateX(5px);
}

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

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: 600;
}

.footer-logo {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1);
}

[data-theme="light"] .footer-logo {
  filter: none;
}

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

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

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: var(--bg-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: var(--font-size-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--secondary-color);
  transform: translateY(-3px);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 2000;
}

.modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

.close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: var(--font-size-2xl);
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-base);
}

.close: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: var(--bg-primary);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-2xl);
    transition: left var(--transition-base);
  }

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

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
  }

  .hero-name {
    font-size: var(--font-size-4xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

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

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

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .achievements-grid {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .profiles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .section {
    padding: var(--spacing-2xl) 0;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: var(--font-size-3xl);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .timeline-item {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
  }

  .timeline-item.left,
  .timeline-item.right {
    padding-left: 0;
    padding-right: 0;
  }

  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
    height: 100%;
  }

  .timeline-item::before {
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .profiles-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    padding: var(--spacing-lg);
    width: 95%;
  }
}

/* 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(-30px);
  transition: all 0.6s ease-out;
}

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

.slide-in-right {
  opacity: 0;
  transform: translateX(30px);
  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; }

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

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }