:root {
  --primary-color: #4a90e2;
  --background-color: #f4f4f9;
  --container-color: #ffffff;
  --text-color: #333333;
  --success-color: #28a745;
  --error-color: #dc3545;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

.form-container {
  background-color: var(--container-color);
  border-radius: 12px;
  box-shadow: 0 8px 16px var(--shadow-color);
  padding: 24px;
  width: 100%;
  max-width: 480px;
  box-sizing: border-box;
}

h1 {
  text-align: center;
  color: var(--primary-color);
  margin-top: 0;
  margin-bottom: 24px;
}

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

label {
  margin-bottom: 8px;
  font-weight: 600;
}

input[type="text"],
input[type="email"],
textarea {
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 16px;
  margin-bottom: 16px;
  transition: border-color 0.3s;
  width: 100%;
  box-sizing: border-box;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

textarea {
  resize: vertical;
  min-height: 100px;
}

button[type="submit"] {
  padding: 12px 20px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
  align-self: flex-start;
}

button[type="submit"]:hover {
  background-color: #357abd;
}

.form-message {
  margin-top: 20px;
  padding: 12px;
  border-radius: 8px;
  text-align: center;
  font-weight: 600;
}

.success-message {
  background-color: #d4edda;
  color: var(--success-color);
  border: 1px solid #c3e6cb;
}

.error-message {
  background-color: #f8d7da;
  color: var(--error-color);
  border: 1px solid #f5c6cb;
}

@media (max-width: 600px) {
  body {
    padding: 10px;
  }
  .form-container {
    padding: 16px;
  }
  button[type="submit"] {
    width: 100%;
  }
}