/* 全域樣式設定 */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

/* 登入表單容器 */
.login-container {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    width: 320px;
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}

/* 輸入框群組 */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
}

.input-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box; /* 確保 padding 不會影響寬度 */
}

/* 登入按鈕 */
.login-button {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    border: none;
    border-radius: 4px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.login-button:hover {
    background-color: #0056b3;
}

/* 錯誤訊息樣式 */
.error-message {
    color: #d93025;
    text-align: center;
    margin-top: 15px;
    font-size: 14px;
    height: 20px; /* 預留空間，避免顯示錯誤時頁面跳動 */
}