/* Theme Colors */
:root {
  --primary-color: #007bff;
  --secondary-color: #6c757d;
  --background-color: #f9f9f9;
  --card-bg: #ffffff;
  --text-color: #333333;
  --border-color: #e0e0e0;
  --hover-color: #0056b3;
  --border-radius: 8px;
  --transition: all 0.3s ease;
  --box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  --header-bg: #ffffff;
  --nav-text: #333333;
  --nav-hover: #007bff;
    /* Dark Mode Colors */
  --dark-bg: #1a1a1a;
  --dark-card-bg: #242424;
  --dark-header-bg: #242424;
  --dark-text: #ffffff;
  --dark-secondary-text: #cccccc;
  --dark-border: #404040;
  --dark-hover: #404040;
}

/* Dark Mode */
[data-theme="dark"] {
  --background-color: var(--dark-bg);
  --card-bg: var(--dark-card-bg);
  --text-color: var(--dark-text);
  --border-color: var(--dark-border);
}

body {
  font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

/* Navigation */
nav {
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 1rem 2rem;
}

.logo {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.cta-button {
  background-color: var(--primary-color);
  color: white !important;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
}

.cta-button:hover {
  background-color: #0056b3;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
}

/* Nav Controls */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon-button {
  background: none;
  border: none;
  padding: 0.5rem;
  font-size: 1.2rem;
  color: var(--text-color);
  cursor: pointer;
  border-radius: var(--border-radius);
  transition: var(--transition);
  margin: 0 0.5rem;
}

.icon-button:hover {
  color: var(--primary-color);
}



/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid #ffffff;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.2rem;
  color: var(--secondary-color);
  margin-bottom: 2rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

.social-links a {
  font-size: 1.5rem;
  color: var(--secondary-color);
  transition: var(--transition);
}

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

/* Sections */
section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

section h2 {
  color: var(--primary-color);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Skills */
.skills-container {
  margin-top: 2rem;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.skill-category h4 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.skills span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #f0f4f8;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  margin: 0.25rem;
}

/* Experience */
.experience-card {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  margin-bottom: 2rem;
}

.experience-card h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.company {
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.duration {
  float: right;
  color: var(--secondary-color);
}

/* Education */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.education-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.cert-item {
  background: white;
  padding: 1.25rem;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cert-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.cert-item i {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.cert-details {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

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

.cert-date {
  font-size: 0.875rem;
  color: var(--secondary-color);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.project-tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tags span {
  background: #f0f4f8;
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: 0.875rem;
}

.project-links {
  margin-top: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: var(--transition);
}

.btn:hover {
  background: #0056b3;
}

/* Contact */
.contact-container {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 2rem;
}

.contact-form {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--secondary-color);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--border-radius);
  font-size: 1rem;
}

.submit-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  position: relative;
  min-width: 150px;
}

.submit-btn:hover {
  background: #0056b3;
}

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

.loading-spinner {
  display: none;
  width: 20px;
  height: 20px;
  margin-left: 8px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  vertical-align: middle;
}

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

.contact-info {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.contact-item {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

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

/* Thank You Page Styles */
.thank-you-section {
  min-height: calc(100vh - 140px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.thank-you-content {
  background: white;
  padding: 3rem;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  width: 90%;
}

.thank-you-content i.fa-check-circle {
  font-size: 4rem;
  color: #28a745;
  margin-bottom: 1.5rem;
}

.thank-you-content h1 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.thank-you-content p {
  color: var(--secondary-color);
  margin-bottom: 2rem;
}

.redirect-notice {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #eee;
}

.redirect-notice p {
  font-size: 0.9rem;
  color: var(--secondary-color);
}

.redirect-notice #countdown {
  font-weight: bold;
  color: var(--primary-color);
}

/* Form Error State */
.form-group.error input,
.form-group.error textarea {
  border-color: #dc3545;
}

.error-message {
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.form-error-message {
  background-color: #f8d7da;
  color: #721c24;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  text-align: center;
}

/* Search Container */
.search-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--card-bg);
  padding: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}

.search-container.active {
  transform: translateY(0);
}

.search-wrapper {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

#searchInput {
  width: 100%;
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  background-color: var(--background-color);
  color: var(--text-color);
}

.clear-search {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  padding: 0.5rem;
}

/* Splash Screen */
#splash-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--background-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.5s ease-out;
}

#splash-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}

.splash-logo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin-bottom: 20px;
  animation: pulse 2s infinite;
}

.splash-title {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 10px;
  animation: fadeIn 1s ease-out;
}

.splash-subtitle {
  color: var(--secondary-color);
  animation: fadeIn 1s ease-out 0.5s both;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 10px rgba(0, 123, 255, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(0, 123, 255, 0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Dark Mode Styles */
[data-theme="dark"] {
  --background-color: var(--dark-bg);
  --card-bg: var(--dark-card-bg);
  --text-color: var(--dark-text);
  --border-color: var(--dark-border);
  --header-bg: var(--dark-header-bg);
  --secondary-color: var(--dark-secondary-text);
  --hover-color: var(--primary-color);
}

[data-theme="dark"] nav {
  background-color: var(--dark-header-bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #242424 0%, #1a1a1a 100%);
}

[data-theme="dark"] .hero img {
  border-color: var(--dark-border);
}

[data-theme="dark"] .skills span {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--dark-text);
  border: 1px solid var(--dark-border);
}

[data-theme="dark"] .skills span i {
  color: var(--primary-color);
}

[data-theme="dark"] .project-tags span {
  background-color: var(--dark-card-bg);
  color: var(--dark-text);
}

[data-theme="dark"] .card,
[data-theme="dark"] .skill-category,
[data-theme="dark"] .experience-card,
[data-theme="dark"] .education-card,
[data-theme="dark"] .project-card,
[data-theme="dark"] .cert-item,
[data-theme="dark"] .contact-form,
[data-theme="dark"] .contact-info,
[data-theme="dark"] .thank-you-content {
  background-color: var(--dark-card-bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .certifications h3 {
  color: var(--primary-color);
}

[data-theme="dark"] .cert-item {
  background-color: var(--dark-card-bg);
  border: 1px solid var(--dark-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .cert-name {
  color: var(--dark-text);
}

[data-theme="dark"] .cert-date {
  color: var(--dark-secondary-text);
}

[data-theme="dark"] .cert-item i {
  color: var(--primary-color);
}

[data-theme="dark"] .cert-item:hover {
  transform: translateY(-2px);
  background-color: var(--dark-hover);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  border-color: var(--primary-color);
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
  background-color: var(--dark-bg);
  border-color: var(--dark-border);
  color: var(--dark-text);
}

[data-theme="dark"] .loading-spinner {
  border-color: #404040;
  border-top-color: var(--primary-color);
}

[data-theme="dark"] .btn:hover,
[data-theme="dark"] .cta-button:hover {
  background-color: #1a75ff;
}

/* Animation Classes */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    padding: 1rem;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    padding: 1rem 0;
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .contact-container {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .tagline {
    font-size: 1rem;
  }

  section {
    padding: 2rem 1rem;
  }

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