{% set pagetitle = "Select your identity provider"|trans %}
{% extends "base.twig" %}

{% block content %}
    <h2>{{ pagetitle }}</h2>

    <p>{{ "Please select the identity provider where you want to authenticate:" | trans }}</p>
    <form method="get" action="{{ urlpattern }}">
        <input type="hidden" name="entityID" value="{{ entityID }}">
        <input type="hidden" name="return" value="{{ return }}">
        <input type="hidden" name="returnIDParam" value="{{ returnIDParam }}">
        <select id="dropdownlist" name="idpentityid" autofocus>
        {% for idpentry in idplist %}
            <option value="{{ idpentry.entityid }}"
            {% if idpentry.entityid == preferredidp %}
                 selected
            {% endif %}
            >{{ idpentry.name }}</option>
        {% endfor %}
        </select>
        <button class="btn" type="submit">{{ 'Select' | trans }}</button>
	{% if rememberenabled %}
            <br/><input type="checkbox" name="remember" id="remember" value="1">
            <label for="remember">{{ 'Remember my choice' | trans }}</label>
        {% endif %}
    </form>
{% endblock %}

{% set pagetitle = "Select your identity provider"|trans %}
{% extends "base.twig" %}

{% block content %}
    <h2>{{ pagetitle }}</h2>

    <p>{{ "Please select the identity provider where you want to authenticate:" | trans }}</p>
    <form method="get" action="{{ urlpattern }}" class="pure-form">
        <input type="hidden" name="entityID" value="{{ entityID }}">
        <input type="hidden" name="return" value="{{ return }}">
        <input type="hidden" name="returnIDParam" value="{{ returnIDParam }}">
        <div class="pure-control-group">
        <select id="dropdownlist" name="idpentityid" autofocus>
        {% for idpentry in idplist %}
            <option value="{{ idpentry.entityid }}"
            {% if idpentry.entityid == preferredidp %}
                 selected
            {% endif %}
            >{{ idpentry.name }}</option>
        {% endfor %}
        </select>
        <button class="btn pure-button" type="submit">{{ 'Select' | trans }}</button>
        </div>
        {% if rememberenabled %}
        <div class="pure-control-group">
            <input type="checkbox" name="remember" id="remember" value="1">
            <label for="remember">{{ 'Remember my choice' | trans }}</label>
        </div>
        {% endif %}
    </form>
{% endblock %}

Make styling more like rest of new UI
Make styling more like rest of new UI
