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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f7fa;
}

/* Header */
.header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 2rem 1rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
  max-width: 900px;
  margin: 0 auto;
}

.back-link {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-block;
  margin-bottom: 1rem;
  transition: color 0.3s;
}

.back-link:hover {
  color: white;
}

.header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.header-meta {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* Container */
.container {
  max-width: 900px;
  margin: 2rem auto;
  background: white;
  padding: 3rem;
  border-radius: 8px;
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

/* Notice box */
.notice {
  background: #fff3cd;
  border-left: 4px solid #ffc107;
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  border-radius: 4px;
}

.notice p {
  margin: 0;
  color: #856404;
}

/* Typography */
h2 {
  color: #667eea;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-size: 1.8rem;
  font-weight: 600;
}

h3 {
  color: #764ba2;
  margin-top: 2rem;
  margin-bottom: 0.8rem;
  font-size: 1.4rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
  text-align: justify;
}

ul, ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
}

strong {
  color: #2c3e50;
  font-weight: 600;
}

/* Contact box */
.contact-box {
  background: #f8f9fa;
  border: 2px solid #667eea;
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 2rem;
}

.contact-box h3 {
  margin-top: 0;
  color: #667eea;
}

/* Footer */
.footer {
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem 1rem;
  text-align: center;
  color: #6c757d;
  font-size: 0.9rem;
}

.footer a {
  color: #667eea;
  text-decoration: none;
  margin: 0 0.5rem;
  transition: color 0.3s;
}

.footer a:hover {
  color: #764ba2;
}

/* Responsive */
@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .container {
    padding: 1.5rem;
    margin: 1rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.2rem;
  }
}