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

:root {
  --primary: #0066cc;
  --primary-dark: #004d99;
  --secondary: #28a745;
  --secondary-dark: #1e7e34;
  --text-dark: #333333;
  --text-light: #666666;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --border: #dee2e6;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-white);
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
}

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

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

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  color: var(--text-dark);
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
}

.section-title p {
  margin-top: 20px;
  font-size: 1.1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

header {
  background-color: var(--bg-white);
  box-shadow: var(--shadow);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}

.logo span {
  color: var(--secondary);
}

.nav-menu {
  display: flex;
  gap: 30px;
}

.nav-menu a {
  font-weight: 500;
  color: var(--text-dark);
  position: relative;
}

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

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition);
}

.nav-menu a:hover::after {
  width: 100%;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-content {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 200px;
  box-shadow: var(--shadow-lg);
  border-radius: 6px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  padding: 10px 0;
}

.nav-dropdown:hover .nav-dropdown-content {
  opacity: 1;
  visibility: visible;
}

.nav-dropdown-content a {
  display: block;
  padding: 10px 20px;
}

.nav-dropdown-content a:hover {
  background-color: var(--bg-light);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background-color: var(--text-dark);
  transition: var(--transition);
}

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 160px 0 100px;
  margin-top: 70px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/pexels-kampus-7492993.jpg') center/cover no-repeat;
  opacity: 0.2;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  margin-bottom: 20px;
}

.hero-text p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 30px;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.hero-image img {
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

.stats {
  background-color: var(--bg-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.stat-item {
  text-align: center;
  padding: 30px;
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}

.stat-label {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-top: 10px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.service-card {
  background: white;
  border-radius: 12px;
  padding: 40px 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

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

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.service-icon svg {
  width: 40px;
  height: 40px;
  fill: white;
}

.service-card h3 {
  margin-bottom: 15px;
}

.service-card p {
  margin-bottom: 20px;
}

.about-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image img {
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

.about-content h2 {
  color: var(--text-dark);
}

.about-list {
  margin: 20px 0;
}

.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 15px;
}

.about-list li::before {
  content: '✓';
  color: var(--secondary);
  font-weight: bold;
  font-size: 1.2rem;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.course-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.course-image {
  height: 200px;
  overflow: hidden;
}

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

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

.course-content {
  padding: 25px;
}

.course-content h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.course-content p {
  font-size: 0.95rem;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--border);
}

.course-price {
  font-weight: 700;
  color: var(--primary);
  font-size: 1.1rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.team-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  text-align: center;
}

.team-image {
  height: 280px;
  overflow: hidden;
}

.team-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-info {
  padding: 25px;
}

.team-info h3 {
  margin-bottom: 5px;
}

.team-info .position {
  color: var(--primary);
  font-weight: 500;
}

.testimonials {
  background-color: var(--bg-light);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.testimonial-card {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: var(--shadow);
}

.testimonial-text {
  font-style: italic;
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 15px;
}

.testimonial-author img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial-author-info h4 {
  font-size: 1rem;
  margin-bottom: 0;
}

.testimonial-author-info span {
  font-size: 0.9rem;
  color: var(--text-light);
}

.cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  text-align: center;
  padding: 80px 0;
}

.cta h2 {
  margin-bottom: 20px;
}

.cta p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

footer {
  background-color: #1a1a2e;
  color: white;
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  margin-top: 15px;
}

.footer-links h4 {
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 10px;
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary);
}

.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 140px 0 80px;
  margin-top: 70px;
  text-align: center;
}

.page-header h1 {
  font-size: 3rem;
}

.page-header p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 15px;
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 25px;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--primary);
}

.contact-form {
  background: var(--bg-light);
  padding: 40px;
  border-radius: 12px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.pricing-card {
  background: white;
  border-radius: 12px;
  padding: 40px 30px;
  box-shadow: var(--shadow);
  text-align: center;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  transform: scale(1.05);
}

.pricing-card.featured::before {
  content: 'Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 5px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
}

.pricing-header {
  margin-bottom: 30px;
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-light);
}

.pricing-features {
  margin-bottom: 30px;
}

.pricing-features li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.value-card {
  text-align: center;
  padding: 30px;
}

.value-icon {
  width: 80px;
  height: 80px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

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

.timeline-item {
  display: flex;
  justify-content: flex-end;
  padding-right: 50%;
  position: relative;
  margin-bottom: 50px;
}

.timeline-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 50%;
}

.timeline-content {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-width: 350px;
  margin-right: 30px;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-right: 0;
  margin-left: 30px;
}

.timeline-year {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 5px 15px;
  border-radius: 20px;
  font-weight: 600;
}

.donation-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.donation-option {
  background: white;
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 25px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.donation-option:hover,
.donation-option.active {
  border-color: var(--primary);
  background: rgba(0, 102, 204, 0.05);
}

.donation-option h3 {
  color: var(--primary);
  margin-bottom: 10px;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border-radius: 12px;
  margin-bottom: 15px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  padding: 20px 25px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary);
}

.faq-item.active .faq-question::after {
  content: '−';
}

.faq-answer {
  padding: 0 25px;
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active .faq-answer {
  padding: 0 25px 20px;
  max-height: 500px;
}

@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-image {
    display: none;
  }

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

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

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

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

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

  .pricing-card.featured {
    transform: none;
  }

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

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }

  .hero {
    padding: 120px 0 80px;
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

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

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

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

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

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

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

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

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

@media (max-width: 480px) {
  section {
    padding: 60px 0;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .donation-options {
    grid-template-columns: 1fr;
  }
}