* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8fafc;
  overflow-x: hidden;
}

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  text-decoration: none;
  color: white;
  cursor: pointer;
  transition: transform 0.3s ease;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: white;
  text-decoration: none;
  transition: all 0.3s;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  position: relative;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.nav-links a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  background-color: white;
  transition: all 0.3s;
}

.nav-links a:hover::after {
  width: 100%;
  left: 0;
}

.mobile-menu {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.mobile-menu:hover {
  transform: scale(1.1);
}

.page-section {
  display: none;
  min-height: calc(100vh - 80px);
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.page-section.active {
  display: block;
  animation: fadeIn 0.5s ease-in;
}

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

.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 4rem 2rem;
  text-align: center;
  border-radius: 15px;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="1" fill="white" opacity="0.1"/><circle cx="10" cy="90" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  pointer-events: none;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.btn {
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: white;
  color: #667eea;
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn:active {
  transform: translateY(-1px);
}

/* Controls */
.controls {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  margin-bottom: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  border: 1px solid #e2e8f0;
}

.search-container {
  flex: 1;
  min-width: 250px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s;
}

.search-input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: #64748b;
  font-size: 1.1rem;
}

.filter-container {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1rem;
  border: 2px solid #e2e8f0;
  background: white;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.9rem;
  font-weight: 500;
}

.filter-btn:hover {
  border-color: #667eea;
  color: #667eea;
  transform: translateY(-1px);
}

.filter-btn.active {
  background: #667eea;
  color: white;
  border-color: #667eea;
  transform: translateY(-1px);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.blog-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: all 0.3s;
  cursor: pointer;
  border: 1px solid #e2e8f0;
  position: relative;
}

.blog-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(102, 126, 234, 0.05), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.blog-card:hover::before {
  opacity: 1;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  border-color: #667eea;
}

.blog-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(45deg, #f0f2f5, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.blog-image::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
  opacity: 0;
  transition: opacity 0.3s;
}

.blog-card:hover .blog-image::after {
  opacity: 1;
}

.blog-content {
  padding: 1.5rem;
  position: relative;
  z-index: 1;
}

.blog-category {
  display: inline-block;
  background: #667eea;
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.blog-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #1e293b;
  line-height: 1.4;
}

.blog-excerpt {
  color: #64748b;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.blog-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: #64748b;
}

.read-more {
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s;
}

.read-more:hover {
  color: #5a67d8;
  transform: translateX(3px);
}

.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.3s ease;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-content {
  background: white;
  padding: 2rem;
  border-radius: 15px;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: slideIn 0.3s ease;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  width: 100%;
}

@keyframes slideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.close {
  position: absolute;
  right: 1rem;
  top: 1rem;
  font-size: 2rem;
  cursor: pointer;
  color: #64748b;
  transition: all 0.3s;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.close:hover {
  color: #333;
  background: #f1f5f9;
  transform: scale(1.1);
}

/* About Page */
.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.about-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  text-align: center;
  border: 1px solid #e2e8f0;
  transition: all 0.3s;
}

.about-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  border-color: #667eea;
}

.about-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.about-card h3 {
  color: #1e293b;
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.about-card p {
  color: #64748b;
  line-height: 1.6;
}

.contact-form {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  max-width: 600px;
  margin: 2rem auto;
  border: 1px solid #e2e8f0;
}

.contact-form h2 {
  color: #1e293b;
  margin-bottom: 1.5rem;
  text-align: center;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #374151;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.subscribe-content {
  background: white;
  padding: 3rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  text-align: center;
  max-width: 600px;
  margin: 2rem auto;
  border: 1px solid #e2e8f0;
}

.subscribe-content h2 {
  color: #1e293b;
  margin-bottom: 1rem;
}

.subscribe-content p {
  color: #64748b;
  margin-bottom: 2rem;
}

.subscribe-form {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.subscribe-input {
  flex: 1;
  min-width: 250px;
  padding: 0.75rem;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s;
}

.subscribe-input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.loading {
  display: none;
  text-align: center;
  padding: 2rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #e2e8f0;
  border-top: 4px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

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

.no-results {
  text-align: center;
  padding: 3rem;
  color: #64748b;
  display: none;
}

.no-results-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.success-message {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem 0;
  display: none;
  text-align: center;
  font-weight: 500;
}

.article-content {
  line-height: 1.8;
}

.article-content h1 {
  color: #1e293b;
  margin-bottom: 1rem;
  font-size: 2rem;
}

.article-content h2 {
  color: #1e293b;
  margin: 2rem 0 1rem 0;
  font-size: 1.5rem;
}

.article-content p {
  margin-bottom: 1rem;
  color: #4a5568;
}

.article-content code {
  background: #f7fafc;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: "Courier New", monospace;
  color: #e53e3e;
}

.article-content pre {
  background: #2d3748;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1rem 0;
  border-left: 4px solid #667eea;
}

.article-content pre code {
  background: none;
  color: inherit;
  padding: 0;
}

.article-content ul {
  margin: 1rem 0;
  padding-left: 2rem;
}

.article-content li {
  margin-bottom: 0.5rem;
  color: #4a5568;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  .nav-links.active {
    display: flex;
    animation: slideDown 0.3s ease;
  }

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

  .mobile-menu {
    display: block;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

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

  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .search-container {
    min-width: auto;
  }

  .filter-container {
    justify-content: center;
  }

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

  .page-section {
    padding: 1rem;
  }

  .modal-content {
    margin: 1rem;
    padding: 1.5rem;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .subscribe-input {
    min-width: auto;
  }

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

@media (max-width: 480px) {
  .hero {
    padding: 2rem 1rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .controls {
    padding: 1rem;
  }

  .blog-grid {
    gap: 1rem;
  }

  .modal-content {
    padding: 1rem;
  }
}

html {
  scroll-behavior: smooth;
}

button:focus,
input:focus,
textarea:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

@media print {
  .modal,
  .loading,
  .controls,
  header {
    display: none !important;
  }

  .page-section {
    display: block !important;
  }
}