body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    width: 300px;
}

.login-form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-form h2 {
    color: #333;
    margin-bottom: 20px;
}

.input-group {
    width: 100%;
    margin-bottom: 15px;
}

.input-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box; /* 너비와 패딩을 포함한 총 너비를 유지 */
}

.input-group input[type="submit"] {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.input-group input[type="submit"]:hover {
    background-color: #45a049;
}

.error-message {
    color: #D8000C;
    background-color: #FFD2D2;
    border: 1px solid #D8000C;
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    font-size: 0.9em;
}

/* 기존의 .welcome-message 스타일 ... */

.welcome-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.logout-button {
    padding: 10px;
    background-color: #f44336;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1em;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    margin-left: 20px; /* 환영 메시지와의 간격 */
}

.logout-button:hover {
    background-color: #e31b0c;
}