form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 800px;
  width: 800px;
  margin: 0 auto;
  padding: 1rem;
}

input,
textarea {
  padding: 1rem;
  border: 2px solid transparent;
  border-radius: 0.5rem;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  width: 100%;
}

input.valid,
textarea.valid {
  border-color: transparent;
}

input.invalid,
textarea.invalid {
  border-color: #f44336;
}

.error-message {
  color: #f44336;
  font-size: 0.9rem;
  text-align: left;
  display: none;
}

.char-counter {
  font-size: 0.8rem;
  text-align: right;
  color: #aaa;
}

button {
  background-color: #06c;
  color: #fff;
  padding: 1rem;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-weight: bold;
  font-size: 1rem;
}

#submitBtn:disabled {
  background: #cccccc;
  color: #888888;
  cursor: not-allowed;
  opacity: 0.7;
  box-shadow: none;
}

.form-feedback {
  max-width: 800px;
  margin: 1rem;
  padding: 1rem;
  border-radius: 0.5rem;
  font-weight: bold;
  text-align: center;
  display: none;
}

.form-feedback.success {
  background-color: #d4edda;
  color: #155724;
  border: 2px solid #c3e6cb;
}

.form-feedback.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 2px solid #f5c6cb;
}

.privacy-notice {
  font-size: 0.85rem;
  color: #666;
  text-align: center;
  margin: 0.5rem 0;
  line-height: 1.4;
}

@media (max-width: 850px) {
  form {
    width: 100%;
    max-width: none;
  }
}