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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1a202c;
  background: #f8fafc;
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  line-height: 1.3;
}

a {
  text-decoration: none;
  color: #1a365d;
  transition: color 0.3s;
}

a:hover { color: #2b6cb0; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Glassmorphism Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(26, 54, 93, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  padding: 16px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  font-family: 'Playfair Display', serif;
}

.logo span { color: #63b3ed; }

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active { color: #63b3ed; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: #fff;
  margin: 5px 0;
  border-radius: 2px;
  transition: 0.3s;
}

/* Hero */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, #0a1628 0%, #1a365d 50%, #2a4a7f 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to top, #f8fafc, transparent);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  background: linear-gradient(to right, #fff, #63b3ed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.8);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: #3182ce;
  color: #fff;
  box-shadow: 0 4px 15px rgba(49, 130, 206, 0.35);
}

.btn-primary:hover {
  background: #2b6cb0;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(49, 130, 206, 0.45);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.4);
  color: #fff;
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
  color: #fff;
}

/* Sections */
.section {
  padding: 96px 0;
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: #0a1628;
}

.section-subtitle {
  text-align: center;
  color: #4a5568;
  max-width: 640px;
  margin: 0 auto 56px;
  font-size: 1.1rem;
}

/* Features / Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.feature-card {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 16px;
  padding: 36px 28px;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(26, 54, 93, 0.12);
  border-color: rgba(49, 130, 206, 0.2);
}

.feature-card .icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #1a365d, #2b6cb0);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: #fff;
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: #0a1628;
}

.feature-card p {
  color: #4a5568;
  font-size: 0.95rem;
}

/* Stats */
.stats {
  background: linear-gradient(135deg, #0a1628, #1a365d);
  color: #fff;
  padding: 80px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}

.stat-item h3 {
  font-size: 2.8rem;
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  color: #63b3ed;
  margin-bottom: 8px;
}

.stat-item p {
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
}

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

.faq-item {
  background: #fff;
  border-radius: 12px;
  margin-bottom: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
  border: 1px solid #e2e8f0;
  overflow: hidden;
}

.faq-question {
  padding: 20px 28px;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #1a365d;
  transition: 0.3s;
  font-family: 'Inter', sans-serif;
}

.faq-question:hover { background: #f7fafc; }

.faq-question .arrow {
  font-size: 1.2rem;
  transition: transform 0.3s;
  color: #3182ce;
}

.faq-item.active .faq-question .arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 28px;
  color: #4a5568;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 28px 20px;
}

/* CTA */
.cta-section {
  background: linear-gradient(135deg, #0a1628, #1a365d);
  color: #fff;
  text-align: center;
  padding: 96px 0;
}

.cta-section h2 {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto 36px;
  font-size: 1.1rem;
}

/* Footer */
.footer {
  background: #0a1628;
  color: rgba(255,255,255,0.7);
  padding: 48px 0;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer a {
  color: #63b3ed;
}

.footer a:hover { color: #90cdf4; }

.footer p {
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.footer .domain {
  color: #fff;
  font-weight: 600;
  margin-bottom: 12px;
  font-size: 1rem;
}

/* About page */
.about-article {
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border-radius: 20px;
  padding: 56px 48px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.04);
  border: 1px solid #e2e8f0;
}

.about-article h2 {
  font-size: 1.8rem;
  color: #0a1628;
  margin: 40px 0 16px;
}

.about-article h2:first-of-type { margin-top: 0; }

.about-article h3 {
  font-size: 1.3rem;
  color: #1a365d;
  margin: 28px 0 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

.about-article p {
  margin-bottom: 16px;
  color: #2d3748;
  font-size: 1.05rem;
}

.about-article ul, .about-article ol {
  margin: 12px 0 20px 24px;
  color: #2d3748;
}

.about-article li { margin-bottom: 8px; }

.formula-box {
  background: #ebf4ff;
  border-left: 4px solid #3182ce;
  padding: 20px 24px;
  border-radius: 0 8px 8px 0;
  margin: 20px 0;
  font-family: 'Courier New', monospace;
  font-size: 1.05rem;
  color: #1a365d;
  overflow-x: auto;
}

.example-box {
  background: #f7fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 24px;
  margin: 20px 0;
}

.example-box h4 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: #1a365d;
  margin-bottom: 12px;
  font-size: 1.05rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h3 {
  font-size: 1.4rem;
  margin-bottom: 16px;
  color: #0a1628;
}

.contact-info p {
  color: #4a5568;
  margin-bottom: 24px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: #4a5568;
}

.contact-detail .icon {
  width: 40px;
  height: 40px;
  background: #ebf4ff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

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

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: #1a365d;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
  background: #fff;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #3182ce;
  box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-status {
  padding: 12px 16px;
  border-radius: 8px;
  margin-top: 16px;
  display: none;
}

.form-status.success {
  display: block;
  background: #c6f6d5;
  color: #22543d;
  border: 1px solid #9ae6b4;
}

.form-status.error {
  display: block;
  background: #fed7d7;
  color: #742a2a;
  border: 1px solid #feb2b2;
}

/* Inner page hero */
.page-hero {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, #0a1628, #1a365d);
  color: #fff;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.6rem;
  margin-bottom: 12px;
}

.page-hero p {
  color: rgba(255,255,255,0.75);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* Breadcrumb JSON-LD hidden */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .menu-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(26, 54, 93, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

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

  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }

  .section-title { font-size: 1.7rem; }

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

  .about-article {
    padding: 32px 20px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

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

@media (max-width: 480px) {
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 1.6rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .cta-section h2 { font-size: 1.6rem; }
}