/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables for Theme */
:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #f59e0b;
  --accent-color: #06b6d4;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --border-color: #e5e7eb;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.1);
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --border-color: #4b5563;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

.section-subtitle {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Loading Screen */
.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
  /* Mobile fixes */
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
}

.loader-content {
  text-align: center;
  /* Mobile centering fixes */
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: auto;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
  /* Center the spinner */
  margin-left: auto;
  margin-right: auto;
}

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

/* Navbar */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
  padding: 1rem 0;
}

[data-theme="dark"] .navbar {
  background: rgba(17, 24, 39, 0.95);
}

.navbar.scrolled {
  padding: 0.5rem 0;
  box-shadow: var(--shadow-medium);
}

.navbar-brand .brand-text {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-link {
  font-weight: 500;
  color: var(--text-primary) !important;
  position: relative;
  transition: var(--transition);
  margin: 0 0.5rem;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

/* Theme Toggle */
.theme-toggle {
  position: relative;
}

.theme-switch {
  display: none;
}

.theme-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 60px;
  height: 30px;
  background: var(--bg-tertiary);
  border-radius: 15px;
  padding: 5px;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid var(--border-color);
}

.theme-label i {
  font-size: 0.8rem;
  transition: var(--transition);
}

.theme-label .fa-sun {
  color: var(--secondary-color);
}

.theme-label .fa-moon {
  color: var(--primary-color);
}

.theme-label::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background: var(--bg-primary);
  border-radius: 50%;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
}

.theme-switch:checked + .theme-label::before {
  transform: translateX(30px);
}

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

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  z-index: -1;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%236366f1" fill-opacity="0.05"><circle cx="30" cy="30" r="4"/></g></svg>');
}

.hero-content {
  padding: 2rem 0;
}

.greeting {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-weight: 500;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 2em;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.btn-animated {
  padding: 0.75rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border: none;
}

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

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

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

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 50px;
  height: 50px;
  background: var(--bg-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.2rem;
  text-decoration: none;
  transition: var(--transition);
  border: 2px solid var(--border-color);
}

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

/* Hero Image */
.hero-image {
  position: relative;
  text-align: center;
}

.hero-img {
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.1));
}

.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.floating-element {
  position: absolute;
  width: 60px;
  height: 60px;
  background: var(--bg-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-medium);
  animation: float 3s ease-in-out infinite;
}

.floating-element.element-1 {
  top: 10%;
  left: 10%;
  color: #61dafb;
  animation-delay: 0s;
}

.floating-element.element-2 {
  top: 20%;
  right: 10%;
  color: #68d391;
  animation-delay: 1s;
}

.floating-element.element-3 {
  bottom: 30%;
  left: 5%;
  color: #f56565;
  animation-delay: 2s;
}

.floating-element.element-4 {
  bottom: 10%;
  right: 20%;
  color: #4299e1;
  animation-delay: 1.5s;
}

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

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-down {
  width: 30px;
  height: 50px;
  border: 2px solid var(--primary-color);
  border-radius: 15px;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  padding-bottom: 8px;
  animation: bounce 2s infinite;
  cursor: pointer;
}

.scroll-down i {
  color: var(--primary-color);
  font-size: 0.8rem;
  animation: bounce-arrow 2s infinite;
}

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

@keyframes bounce-arrow {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(5px);
  }
  60% {
    transform: translateY(2px);
  }
}

/* About Section */
.about-section {
  background: var(--bg-secondary);
  padding: 5rem 0;
}

.about-image {
  position: relative;
}

.about-badge {
  position: absolute;
  top: 2rem;
  right: 2rem;
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  box-shadow: var(--shadow-medium);
}

.about-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.skill-item {
  background: var(--bg-primary);
  padding: 1.5rem 1rem;
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
  border: 2px solid var(--border-color);
}

.skill-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.skill-item i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.skill-item span {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

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

/* Experience Section */
.experience-section {
  padding: 5rem 0;
}

.experience-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 2rem;
  height: 100%;
  box-shadow: var(--shadow-light);
  border: 2px solid var(--border-color);
  transition: var(--transition);
}

.experience-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
  border-color: var(--primary-color);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
}

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

.card-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

.timeline {
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 1rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-left: 3rem;
  margin-bottom: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 0.5rem;
  top: 0.5rem;
  width: 1rem;
  height: 1rem;
  background: var(--primary-color);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 3px var(--border-color);
}

.timeline-content h5 {
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9rem;
  display: block;
  margin-bottom: 0.5rem;
}

.timeline-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Projects Section */
.projects-section {
  background: var(--bg-secondary);
  padding: 5rem 0;
}

.project-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
  border: 2px solid var(--border-color);
  height: 100%;
}

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

.project-image {
  position: relative;
  overflow: hidden;
  height: 250px;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(99, 102, 241, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

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

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  width: 50px;
  height: 50px;
  background: white;
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.2rem;
  transition: var(--transition);
}

.project-link:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.1);
}

.project-content {
  padding: 2rem;
}

.project-content h4 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.project-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag {
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

.coming-soon {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
  border: 2px dashed var(--border-color);
}

.coming-soon-icon {
  width: 80px;
  height: 80px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 2rem;
  color: white;
}

/* Contact Section */
.contact-section {
  padding: 5rem 0;
}

.contact-info {
  padding: 2rem 0;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  border: 2px solid var(--border-color);
  transition: var(--transition);
}

.contact-item:hover {
  border-color: var(--primary-color);
  transform: translateX(10px);
}

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

.contact-details h5 {
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.contact-details p {
  color: var(--text-secondary);
  margin: 0;
}

.social-links-contact {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.contact-form {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 2px solid var(--border-color);
}

.form-control {
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  background: var(--bg-primary);
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
  color: var(--text-primary);
}

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

/* Footer */
.footer {
  background: var(--bg-tertiary);
  border-top: 2px solid var(--border-color);
  color: var(--text-secondary);
}

.footer .text-danger {
  color: #ef4444 !important;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-large);
}

/* Responsive Design */
@media (max-width: 992px) {
  .section-title {
    font-size: 2rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .hero-buttons {
    justify-content: center;
    text-align: center;
  }
  
  .floating-element {
    display: none;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
  }
  
  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.8rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn-animated {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .about-badge {
    position: static;
    margin-bottom: 1rem;
    display: inline-flex;
  }
  
  .timeline::before {
    left: 0.5rem;
  }
  
  .timeline-item {
    padding-left: 2rem;
  }
  
  .timeline-item::before {
    left: 0;
  }
  
  .contact-item {
    flex-direction: column;
    text-align: center;
  }
  
  .contact-item:hover {
    transform: translateY(-5px);
  }
}

@media (max-width: 576px) {
  .hero-section {
    padding: 5rem 0 2rem;
    text-align: center;
  }
  
  .hero-title {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .experience-card,
  .contact-form {
    padding: 1.5rem;
  }
  
  .project-content {
    padding: 1.5rem;
  }
  
  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 45px;
    height: 45px;
  }
  
  /* Mobile Loading Screen Fix */
  .loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: -webkit-fill-available; /* iOS Safari fix */
    min-height: 100vh;
    min-height: -webkit-fill-available; /* iOS Safari fix */
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }
  
  .loader-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: auto;
    text-align: center;
  }
  
  .spinner {
    margin: 0 auto 1rem auto;
    display: block;
  }
}

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

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

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

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

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

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

/* Selection */
::selection {
  background: var(--primary-color);
  color: white;
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
.form-control:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .navbar,
  .back-to-top,
  .scroll-indicator {
    display: none !important;
  }
}