<div id="newMessage">
  <input type="text" id="message" size="45" autocomplete="off" autofocus>
  <div id="stamp-container-horizontal"></div>
  <input type="submit" value="send" id="send" style="display:none"> 
  {{if .env.IsMobile}}
    <div id="つらいスペース" style="height:10px"></div>
  {{else}}
  <input type="submit" value="プレイリスト再生" id="playlist-start">
  <label class="clickable"><input type="checkbox" id="enable-notification">通知</label>
  {{end}}
</div>

<div id="newMessage">
  {{if .env.IsMobile}}
    <input type="text" id="message" size="38" autocomplete="off" autofocus>
  {{else}}
    <input type="text" id="message" size="60" autocomplete="off" autofocus>
  {{end}}
  <div id="stamp-container-horizontal"></div>
  <input type="submit" value="send" id="send" style="display:none"> 
  {{if .env.IsMobile}}
    <div id="つらいスペース" style="height:10px"></div>
  {{else}}
  <input type="submit" value="プレイリスト再生" id="playlist-start">
  <label class="clickable"><input type="checkbox" id="enable-notification">通知</label>
  {{end}}
</div>

Fix input width a bit
Fix input width a bit
