body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #f0f2f5;
  font-family: 'Segoe UI', sans-serif;
}

.login-container {
  background: white;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
}

.logo {
  text-align: center;
  margin-bottom: 30px;
  color: #2c3e50;
}

.form-group {
  margin-bottom: 20px;
}

input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 5px;
  box-sizing: border-box;
}

.button-group {
  display: flex;
  gap: 10px;
}

button {
  flex: 1;
  padding: 15px;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  background: #2980b9;
}

.btn-submit {
  background: #3498db;
}

.btn-submit:hover {
  background: #2980b9;
}

/* 오타 수정: 원래 코드에 있던 세미콜론 중복(;;)을 하나로 수정했어 */
.btn-register {
  background: #16a085;
}

.btn-register:hover {
  background: #117a65;
}

.error-message {
  color: #e74c3c;
  margin-top: 10px;
  padding: 10px;
  background: #fcf2f2;
  border-radius: 5px;
  display: none;
}