* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f4f9;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 600px;
  margin: 40px auto;
  background: #ffffff;
  padding: 20px 30px 30px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: 6px;
  font-weight: 600;
  color: #333;
}

input[type="text"],
input[type="email"],
select,
textarea {
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 14px;
}

input[type="text"]:focus,
input[type="email"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: #4a90e2;
  box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

fieldset.form-group {
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 10px 12px 12px;
  margin-bottom: 16px;
}

fieldset.form-group legend {
  font-weight: 600;
  padding: 0 6px;
}

fieldset.form-group label {
  margin-right: 12px;
  font-weight: 400;
}

button {
  padding: 10px 16px;
  border-radius: 6px;
  border: none;
  font-size: 14px;
  cursor: pointer;
  margin-right: 8px;
}

button[type="submit"] {
  background-color: #4a90e2;
  color: #ffffff;
}

button.secondary {
  background-color: #e0e0e0;
  color: #333333;
}

button:hover {
  opacity: 0.95;
}

.error-message {
  color: #c0392b;
  font-size: 12px;
  margin-top: 4px;
  min-height: 14px;
}

input.error,
select.error,
textarea.error,
fieldset.error {
  border-color: #c0392b;
  box-shadow: 0 0 0 1px rgba(192, 57, 43, 0.35);
}

.result {
  margin-top: 24px;
  padding: 16px 18px;
  border-radius: 8px;
  background: #f0f8ff;
  border: 1px solid #4a90e2;
}

.result h2 {
  margin-top: 0;
  margin-bottom: 10px;
  color: #2c3e50;
}

.result p {
  margin: 0;
  line-height: 1.5;
  color: #333333;
}

.hidden {
  display: none;
}