/* Subtle background with soft gradient */
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
  min-height: 100vh;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 40px 20px;
}

header {
  text-align: center;
  padding: 30px 0;
}

header h1 {
  font-size: 2.5rem;
  color: #333;
  margin: 0;
  font-weight: 300;
  letter-spacing: 2px;
}

.button-column {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 20px 0;
}

.btn-large {
  display: block;
  width: calc(100% + 48px);
  margin: 0 -24px;
  padding: 32px 24px;
  font-size: 1.5rem;
  font-weight: 500;
  text-decoration: none;
  color: #ffffff;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-large:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
  color: #ffffff;
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.btn-large:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

footer {
  text-align: center;
  padding: 40px 0;
  color: #666;
  font-size: 0.9rem;
}