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

:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --text-color: #1f2937;
  --text-secondary: #4b5563;
  --background: #f9fafb;
  --card-background: #ffffff;
  --border-color: #e5e7eb;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--background);
  color: var(--text-color);
  line-height: 1.7;
  font-size: 16px;
}

.header {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 50px 20px;
  text-align: center;
}

.header h1 {
  font-size: 2rem;
  margin-bottom: 8px;
  font-weight: 700;
}

.header .app-name {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 15px;
}

.last-updated {
  background: rgba(255, 255, 255, 0.15);
  display: inline-block;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 30px 20px;
}

.intro {
  background: var(--card-background);
  padding: 25px;
  border-radius: 10px;
  margin-bottom: 25px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border-left: 4px solid var(--primary-color);
}

.intro p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.section {
  background: var(--card-background);
  padding: 25px;
  border-radius: 10px;
  margin-bottom: 15px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.section h2 {
  color: var(--primary-color);
  font-size: 1.15rem;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.section-content {
  color: var(--text-secondary);
}

.section-content p {
  margin-bottom: 12px;
}

.section-content strong {
  color: var(--text-color);
}

.section-content ul {
  margin: 12px 0;
  padding-left: 20px;
}

.section-content li {
  margin-bottom: 6px;
}

.subsection {
  margin: 15px 0;
  padding: 15px;
  background: var(--background);
  border-radius: 8px;
}

.subsection-title {
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.contact-box {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  padding: 25px;
  border-radius: 10px;
  margin-top: 25px;
  text-align: center;
}

.contact-box h3 {
  color: var(--primary-color);
  margin-bottom: 15px;
  font-size: 1.1rem;
}

.contact-box p {
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.contact-box a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.contact-box a:hover {
  text-decoration: underline;
}

.footer {
  background: var(--text-color);
  color: white;
  padding: 30px 20px;
  text-align: center;
  margin-top: 30px;
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer p {
  opacity: 0.8;
  font-size: 0.85rem;
}

.footer-links {
  margin-top: 15px;
}

.footer-links a {
  color: white;
  text-decoration: none;
  margin: 0 12px;
  opacity: 0.8;
  font-size: 0.9rem;
}

.footer-links a:hover {
  opacity: 1;
  text-decoration: underline;
}

@media (max-width: 600px) {
  .header {
    padding: 40px 15px;
  }

  .header h1 {
    font-size: 1.6rem;
  }

  .section {
    padding: 20px;
  }

  .container {
    padding: 20px 15px;
  }

  .section h2 {
    font-size: 1.05rem;
  }
}