* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background-color: #f6f8fa;
  color: #24292f;
  line-height: 1.6;
  font-size: 16px;
}

header {
  background-color: #24292f;
  color: #fff;
  padding: 0.5rem 0.5rem;
  text-align: center;
  position: relative;
}

header h1 {
  font-size: 3.5rem;
  margin: 0;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

header p {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
  color: #d0d7de;
}

.content {
  background-color: #ffffff;
  max-width: 600px;
  margin: -5rem auto 3rem auto;
  padding: 1.5rem 2rem;
  border-radius: 10px;
  border: 1px solid #d0d7de;
  box-shadow: 0 4px 12px rgba(27, 31, 35, 0.05);
}

.content h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #24292f;
}

form {
  display: flex;
  flex-direction: column;
}

label {
  margin-top: 1.25rem;
  font-weight: 600;
}

input,
textarea {
  margin-top: 0.3rem;
  padding: 0.9rem;
  font-size: 1rem;
  width: 100%;
  border: 1px solid #d0d7de;
  border-radius: 6px;
  background-color: #ffffff;
  transition: border-color 0.2s ease;
}

input:focus,
textarea:focus {
  border-color: #0969da;
  outline: none;
}

/* Shared Button Style */
.btn-primary {
  margin-top: 1.5rem;
  padding: 0.9rem 1.2rem;
  font-size: 1rem;
  font-weight: 600;
  background-color: #0969da;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn-primary:hover {
  background-color: #054da2;
}

.btn-primary:disabled {
  background-color: #a0a0a0;
  cursor: not-allowed;
}

.g-recaptcha {
  margin-top: 1.5rem;
}

footer {
  text-align: center;
  font-size: 0.9rem;
  color: #57606a;
  padding: 2rem 1rem;
}

/* Mobile Adjustments */
@media screen and (max-width: 600px) {
  header h1 {
    font-size: 2rem;
  }
  header p {
    font-size: 1rem;
  }
  .content {
    margin: 1rem;
    padding: 2rem 1.5rem;
  }
}