:root {
  --primary-color: #ff0000;
  --secondary-color: #282828;
  --text-color: #333;
  --background-color: #f9f9f9;
  --card-background: #ffffff;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.6;
}

header {
  background: var(--secondary-color);
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

header p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
  opacity: 0.9;
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

#iframe-container {
  background: var(--card-background);
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

#iframe-container p[aria-live="polite"] {
  text-align: center;
  color: var(--primary-color);
  font-weight: 500;
}

iframe {
  border-radius: 8px;
  margin-top: 1rem;
}

section {
  background: var(--card-background);
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
  margin-top: 2rem;
}

h2 {
  color: var(--secondary-color);
  margin-bottom: 1rem;
  font-size: 1.8rem;
}

details {
  margin-top: 1rem;
}

summary {
  cursor: pointer;
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 1rem;
}

summary:hover {
  color: #cc0000;
}

code {
  background: #f4f4f4;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #cc0000;
  text-decoration: underline;
}

footer {
  background: var(--secondary-color);
  color: white;
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 3rem;
}

footer hr {
  display: none;
}

footer p {
  margin: 0.5rem 0;
}

footer a {
  color: white;
}

/* Loading animation */
@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

#iframe-container p[aria-live="polite"]:first-of-type {
  animation: pulse 1.5s infinite;
}

/* Responsive design */
@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }
  
  main {
    padding: 0 0.5rem;
  }
  
  section {
    padding: 1rem;
  }
}