.auth-container {
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #ffd89b;
        /* fallback for old browsers */
        background: -webkit-linear-gradient(to right, #19547b, #ffd89b);
        /* Chrome 10-25, Safari 5.1-6 */
        background: linear-gradient(to right, #19547b, #ffd89b);
        /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

        padding: 20px;
    }

    .auth-card {
        background: white;
        border-radius: 10px;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        width: 100%;
        max-width: 650px;
        padding: 40px;
    }

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

    .auth-header h1 {
        font-size: 28px;
        margin: 0 0 10px 0;
        color: #333;
    }

    .auth-header p {
        color: #666;
        margin: 0;
    }

    .form-icon {
        vertical-align: middle;
        margin-right: 8px;
        color: #667eea;
    }

    .auth-footer {
        text-align: center;
        margin-top: 20px;
        padding-top: 20px;
        border-top: 1px solid #e9ecef;
    }

    .form-icon {
    vertical-align: middle;
    margin-right: 8px;
    color: #667eea;
}



.info-box {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

.info-box p {
    margin: 0;
    color: #1976d2;
    font-size: 14px;
}

/* 分隔線 */
.auth-divider {
    text-align: center;
    margin: 30px 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e9ecef;
}

.auth-divider span {
    position: relative;
    background: white;
    padding: 0 15px;
    color: #999;
    font-size: 14px;
}

/* 第三方登入按鈕 */
.social-login {
    margin-top: 20px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background: white;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    color: #333;
    font-size: 15px;
}

.social-btn:hover {
    background: #f8f9fa;
    border-color: #999;
    text-decoration: none;
    color: #333;
}

.social-btn img {
    width: 20px;
    height: 20px;
    margin-right: 10px;
}

/* 密碼顯示切換按鈕 */
.password-toggle-btn {
    position: absolute;
    top: 0;
    right: 10px;
    height: 40px;
    display: flex;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    color: #666;
    transition: color 0.2s;
    z-index: 10;
}

.password-toggle-btn:hover {
    color: #667eea;
}

.password-toggle-btn .material-icons {
    font-size: 20px;
}

.password-toggle {
    position: relative;
}