:root {
  --primary-color: #1a202c;
  --secondary-color: #2d3748;
  --text-color: #4a5568;
  --bg-color: #f7fafc;
  --container-bg: #fff;
  --accent-color: #3182ce;
  --border-color: #e2e8f0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.7;
  color: var(--text-color);
  background-color: var(--bg-color);
  margin: 0;
  padding: 40px 20px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--container-bg);
  padding: 50px 60px;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 10px 15px rgba(0, 0, 0, 0.03);
}

.header { text-align: center; margin-bottom: 40px; }
.logo { max-width: 180px; height: auto; margin-bottom: 20px; }

h1 {
  color: var(--primary-color);
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 15px;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--border-color);
}

h2 {
  color: var(--secondary-color);
  font-size: 16px;
  font-weight: 600;
  margin-top: 35px;
  margin-bottom: 15px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

p { margin-bottom: 16px; text-align: justify; }
ul { margin-bottom: 16px; padding-left: 20px; }
li { margin-bottom: 10px; text-align: justify; }

a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

a:hover { color: #2b6cb0; text-decoration: underline; }
strong { color: var(--primary-color); font-weight: 600; }

.footer {
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  color: #a0aec0;
  text-align: center;
}

.validation-subtitle { font-size: 18px; font-weight: 400; color: #718096; }

@media (max-width: 600px) {
  .container { padding: 30px 20px; }
  body { padding: 20px 10px; }
  h1 { font-size: 20px; }
}