body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  color: #333;
  margin: 0;
  padding: 0;
}

.header {
  background-color: #4CAF50;
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
}

.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
  background-color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.intro,
.video-section {
  margin-bottom: 2rem;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 ratio */
  height: 0;
  overflow: hidden;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem;
}

.signup-form input {
  padding: 0.5rem;
  font-size: 1rem;
}

.signup-form button {
  margin-top: 1rem;
  padding: 0.75rem;
  background-color: #4CAF50;
  color: #fff;
  border: none;
  cursor: pointer;
}