スマホ画面でswiperを使って100％表示ができません。

PC用でカルーセル表示ありのメイン1枚と前後画面表示のスライドは実装できましたが、スマホでは画像1枚100％でスライドをさせたいのですが、どうしても崩れてしまいます。

ご教授お願いします。

HTML
<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>swiperJS</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.1/css/swiper.css">
  <link rel="stylesheet" href="　.css">
    </head>

<style type="text/css">
<!-- 
a:hover {
opacity:0.8;
filter:alpha(opacity=60);
-ms-filter: "alpha( opacity=60 )";
}
-->
</style>

<!-- スライドバナー編集はこちらのhtmlからサイズ幅750縦450で作成 -->

    <body>


<div class="mainslide container">

<div class="container">
<div class="swiper-container">
<div class="swiper-wrapper">

        <div class="swiper-slide">Slide 1</div>
        <div class="swiper-slide">Slide 2</div>
        <div class="swiper-slide">Slide 3</div>

</div>
<!-- スライドバナー編集はこちらのhtmlからサイズ幅750縦450で作成ここまで -->+


<br><br>
<div class="swiper-pagination"></div>

    			<!-- If we need navigation buttons -->
      <div class="swiper-button-prev">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 27 44">
          <path class="arrow arrow-left" d="M0,22L22,0l2.1,2.1L4.2,22l19.9,19.9L22,44L0,22L0,22L0,22z" />
        </svg>
      </div><!-- .swiper-button-prev -->

      <div class="swiper-button-next">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 27 44">
          <path class="arrow arrow-right" d="M27,22L27,22L5,44l-2.1-2.1L22.8,22L2.9,2.1L5,0L27,22L27,22z" />
        </svg>
      </div><!-- .swiper-button-next -->
</div>
</div>
</div>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.1/js/swiper.min.js"></script>
    <script>
var swiper = new Swiper('.swiper-container', {

    slidesPerView: 3,
    autoplay: 3000,
    speed: 2000,
    loop: true,
        centeredSlides: true,
        paginationClickable: true,
        pagination: '.swiper-pagination',
        autoplayDisableOnInteraction: false,
    // ナビゲーションボタン
    nextButton: '.swiper-button-next',
    prevButton: '.swiper-button-prev',

    // 1スライドごとの余白
    spaceBetween: 5

});
    </script>

    </body>
</html>

css
.container {
	overflow: hidden;
	width: 100vw;
}
.swiper-container {
	width: 250vw;
	margin: 0 -80vw;
}
.swiper-button-prev {
	left: calc(10px + 25vw);
}
.swiper-button-next {
	right: calc(10px + 25vw);
}

.swiper-slide img {
	width: 100%;
}

 .swiper-slide-next{
        opacity: 0.2;
      }
      .swiper-slide-prev{
        opacity: 0.2;
      }
      
.swiper-pagination-bullet {
      width: 13px;
      height: 13px;
      text-align: center;
      line-height: 10px;
      font-size: 8px;
      color:#000;
      opacity: 1;
      background: rgba(0,0,0,0.2);
    }
    .swiper-pagination-bullet-active {
      color:#fff;
      background: #444444;
    }