@charset "utf-8";

/* =========================================
   全体の共通設定
========================================= */
body {
  width: 90%;
  margin: 0 auto;
  text-align: center;
  background-color: #fff;
  background-image: url("img/background.png");
  background-size: 90%;
  font-family: "Kosugi Maru", "Yu Gothic", "Hiragino Maru Gothic Pro", sans-serif !important;
  letter-spacing: 1.5px;
}

/* =========================================
   上部固定メニューバー
========================================= */
.fixed-buttons {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 20px 0;
  background: radial-gradient(at top, #fff, #ffefff);
  display: flex;
  justify-content: center;
  gap: 40px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  z-index: 1000;
}

.fixed-buttons button {
  width: 120px;
  padding: 15px 0;
  color: #fff;
  font-size: 25px;
  border: none;
  border-radius: 40px;
  cursor: pointer;
  font-weight: bold;
  background: radial-gradient(at bottom, #fff, #6134f6);
}

.fixed-buttons button:hover {
  background: radial-gradient(at top, #fff, #0056b3);
}

/* =========================================
   ヒーロー画像（ページ上部の大画像）
========================================= */
.hero {
  width: 100%;
  height: 640px;
  margin-top: 18px;  /*固定メニュー分だけ下げる */
  background-image: url("img/topbanner.png");
  background-size: cover;
  background-position: center;
}

/* =========================================
   タイトル・テキスト
========================================= */
h2 {
  font-size: 6rem;
  font-weight: bold;
  color: #000;
  display: inline-block;
  border-bottom: 2px solid #7c3bf6;
  padding-bottom: 4px;
}

h3 {
  font-size: 2.5rem;
  font-weight: bold;
  color: #6134f6;
  padding-bottom: 40px;
  letter-spacing: 7px;
  line-height: 1.8;
}

h4 {
  font-size: 1.4rem;
  font-weight: bold;
  padding-bottom: 40px;
  line-height: 1.8;
}

h5 {
  font-size: 1.2rem;
  font-weight: bold;
  padding-bottom: 40px;
  color: #afc3e0;
}

p {
  line-height: 1.6;
}

section {
  padding-top: 80px;
}

/* =========================================
   画像
========================================= */

/* アスタロゴ a */
.img0a {
  height: 40px;
  width: auto;
  cursor: pointer;
}

/* アスタロゴ b */
.img0b {
  width: 200px;
  height: auto;
  display: block;
  margin-left: 5%;
  padding-top: 5%;
  padding-bottom: 60px;
}

/* ライブ配信画像 */
.img2 {
  width: 80%;
  height: auto;
  padding-bottom: 60px;
}

/* =========================================
   ボタン
========================================= */
.btn1 {
  display: inline-block;
  padding: 20px 30px;
  color: #fff;
  font-size: 2.0rem;
  font-weight: bold;
  text-decoration: none;
  border-radius: 50px;
  background: radial-gradient(at bottom, #fff, #6134f6);
  transition: 0.3s;
  box-shadow: 0 10px 10px rgba(0,0,0,0.5);
}

.btn1:hover {
  background: radial-gradient(at top, #fff, #f8c8dc);
  color: #6134f6;
}

.btn2 {
  display: inline-block;
  padding: 10px 20px;
  color: #fff;
  font-weight: bold;
  border-radius: 20px;
  margin: 10px;
  text-decoration: none;
  background: radial-gradient(at bottom, #fff, #6134f6);
  transition: 0.3s;
  box-shadow: 0 10px 10px rgba(0,0,0,0.5);
}

.btn2:hover {
  background: radial-gradient(at top, #fff, #f8c8dc);
  color: #6134f6;
}

/* =========================================
   ギャラリー（LIVER 一覧）
========================================= */
.grid-container {
  width: 90%;
  margin: 40px auto;
  display: grid;
  gap: 30px;
  grid-template-columns: repeat(4, 1fr);
}

.item {
  width: 100%;
  height: 380px;
  background: #fafafa;
  border-radius: 20px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.item img {
  width: 100%;
  height: 300px;
  border-radius: 20px 20px 0 0;
  object-fit: cover;
}

.item p {
  font-size: 20px;
  margin-top: 6px;
  line-height: 1.0;
}

a {
  text-decoration: none;
}

/* =========================================
   フッター
========================================= */
footer {
  width: 100%;
  margin-top: 60px;
  padding: 40px 0;
  background-color: #eaffff;
  background-image: url("img/background.png");
  background-size: cover;
  border-radius: 20px 20px 0 0;
  text-align: center;
}

.footer2 {
  display: flex;
  justify-content: center;
  gap: 100px;
margin-top: 100px;
}

img.hover-move {
display: inline-block;
transition: 0.3s ease;
}
img.hover-move:hover {
transform: translateY(-20px);
}

.btn3 img {
  width: 80px;
  height: auto;
}

/* =========================================
   ───   990px 以下（タブレット）   ───
========================================= */
@media screen and (max-width: 1024px) {

  h2 { font-size: 4rem; }
  h3 { font-size: 2rem; }

  .grid-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .img2 { width: 95%; }

  .fixed-buttons {
    gap: 20px;
    padding: 12px 0;
  }

  .fixed-buttons button {
    width: 80px;
    font-size: 18px;
  }

  .hero {
    height: 250px;
  }
}

/* =========================================
   ───   430px 以下（スマホ）   ───
========================================= */
@media screen and (max-width: 599px) {

  body {
    width: 100%;
    background-size: 150%;
  }

  h2 { font-size: 4.0rem; }
  h3 { font-size: 1.8rem; letter-spacing: 2px; }
  h4 { font-size: 0.6rem; }
  h5 { font-size: 0.5rem; }

  .hero {
    height: 280px;
    margin-top: 10px;
  }

  .grid-container {
    grid-template-columns: 1fr;
  }

  /*.item { height: auto; }
  .item img { height: 220px; }*/
  .item { height: auto;
          margin: 0 auto;
          width: 80%}
  .item img { height: 400px; }

  .btn1 {
    font-size: 1.4rem;
    padding: 14px 20px;
  }

  .fixed-buttons {
    gap: 12px;
    padding: 10px 0;
  }

  .fixed-buttons button {
    width: 70px;
    font-size: 14px;
    padding: 10px 0;
  }

  .footer2 {
    gap: 50px;
  }

  .btn3 img {
    width: 60px;
  }
}