@charset "utf-8";

header {
  display: flex;
  justify-content: space-between; 
  align-items: center;           
  padding: 2% 10% 1%;               
}
header img{
  margin-left: 0;
}
nav a {
  font-size: 14px;
  text-decoration: none;
  margin-left: 20px;
  text-decoration: none;
  color: #333;
}
img[src="mainvisual.jpg"] {
  width: 100vw;          
  height: 600px;        
  object-fit: cover;    
  object-position: center; 
  display: block;   
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);  
}
nav{
  margin-right: 0;
}
.title-wrapper {
  text-align: center; 
  margin-top: 40px;   
}

h1 {
  font-size: 32px;
  display: inline-block;
  border-bottom: 1px solid #333;
  padding-bottom: 5px;
}
section{
  display: flex;
  margin: 40px auto;
  padding: 0 4%;
}
section.about{
  max-width: 600px;
}

h2{
  font-size: 16px;
}
div{
  font-size: 14px;
}

.about img{
  border-radius: 50%;
  margin-right: 30px;
}
h3{
  font-size: 32px;
  display: inline-block;
  border-bottom: 1px solid #333;
  padding-bottom: 5px;
}
.three-bicycle{
  text-align: center; 
  margin-top: 80px 0 40px;   
}
.bicycle-list {
  display: flex;
  justify-content: center; /* これで真ん中寄せ！ */
  max-width: 960px;        /* 画面いっぱいに広がらないよう制限 */
  padding: 0 4%;
}
/* 自転車セクション全体の箱 */
section.bicycle {
  display: flex;
  justify-content: center; 
  align-items: flex-start; 
  max-width: 780px;        
  text-align: center;
 margin-top: 20px;
 padding: 0 4%;
 gap: 0;
 
}

.bicycle-list {
  display: block;         
  flex: 0 0 260px;
  width: 260px;            
}

/* 自転車の画像 */
.bicycle-list img {
  width: 100%;   
  height: auto;   
  display: block;
  margin-bottom: 10px;                       
}

/* タイトルとテキスト */
.bicycle-list h4 {
  font-size: 16px;
}

.bicycle-list p {
  font-size: 14px;
  line-height: 1.5;
}
.three-bicycle {
  text-align: center; 
  margin-top: 40px; 
}
footer{
  
  color: #555;
  padding: 12px 0;
text-align: center;
}
small{
  font-size: 12px;
}


/* 画面幅が600px以下の時（スマホ用）の設定 */
@media (max-width: 600px) {
  header img {
    margin-left: 0;   
  }
  
  nav {
    margin-right: 0; 
  }

  header {
    padding: 3% 4%;   
  }
  img[src="mainvisual.jpg"] {
    width: 100vw;
    height: 600px; 
    object-fit: cover;
    object-position: center; 
    margin-left: calc(50% - 50vw);
  }

  /* 3. セクション全体：すべて縦並びに */
  section, section.about, section.bicycle {
    flex-direction: column;
    max-width: 100%;
    margin: 40px auto;
    gap: 30px; 
  }

  /* About：画像の右余白を消して、下に余白を作る */
  .about img {
    margin: 0 auto 20px;
  }
  .about div {
    text-align: center; 
  }

  /* Bicycle：各リストを幅いっぱい（または指定幅）にして縦に積む */
  .bicycle-list {
    flex: none;
    width: 100%;
    max-width: 300px; /* 画像が大きくなりすぎないよう制限 */
    margin: 0 auto;
  }
}