* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 使用特定的容器類別而非直接設定 body */
.signin-page-wrapper {
    font-family: 'Microsoft JhengHei', Arial, sans-serif;
    /*background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);*/
    /*min-height: 100vh;*/
    display: flex;
    justify-content: center;
    align-items: center;
}

input {
    max-width: 100%;
}

.login-container {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 10px;
}

.login-header p {
    color: #666;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    color: #555;
    font-weight: bold;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
    box-sizing: border-box;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus {
    outline: none;
    border-color: #667eea;
}

.form-group input[type="submit"],
.form-group button,
.form-group .btn {
    width: 100%;
    box-sizing: border-box;
}

.captcha-group {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.captcha-group .captcha-input {
    flex: 1;
}

.captcha-group .captcha-input input {
    width: 100%;
    box-sizing: border-box;
}

.captcha-display {
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 5px;
    /*padding: 12px 20px;*/
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 5px;
    color: #667eea;
    text-align: center;
    user-select: none;
    min-width: 100px;
}

.btn-login {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-login:active {
    transform: translateY(0);
}

.error-message {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 15px;
    text-align: center;
    display: none;
}

.error-message.show {
    display: block;
}

.required {
    color: #e74c3c;
}