.complex_form {
  margin: 5vh auto;
  width: 100%;
  max-width: 480px;
  border-radius: 12px;
  border: 1px solid #ccc;
  padding: 32px 24px;
  background: #fafafa;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
}

.complex_form input {
  font-size: 16px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid #ccc;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.complex_form input:focus {
  border-color: #3c3d3f;
  box-shadow: 0 0 0 2px rgba(60, 61, 63, 0.2);
}

.form_buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.btn {
  border-radius: 8px;
  text-align: center;
  font-size: 16px;
  font-weight: 500;
  color: #3c3d3f;
  background: #fff;
  border: 2px solid #3c3d3f;
  padding: 8px 16px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover {
  background: #3c3d3f;
  color: #fff;
}

body {
  background: #f3f3f3;
  font-family: "Inter", Arial, sans-serif;
  color: #3c3d3f;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header #title {
  font-size: 42px;
  margin-bottom: 20px;
  text-align: center;
}