body {
    background-color: #fff7e6; /* やさしいクリーム色 */
    font-family: "Yu Gothic", sans-serif;
    line-height: 1.8;
    margin: 0;
    padding: 10px;
}
h1 {
    font-size: 1.8em;
    color: #333;
    margin: 0 0 0.2em 0;
}
h2 {
    font-size: 1.3em;
    color: #555;
    margin: 0.2em 0 0.2em 0;
    border-left: 6px solid #ffb74d;
    padding-left: 10px;
}
.nav-link {
    font-size: 1em;
    font-weight: bold;
    color: #007acc;
    text-decoration: none;
    margin-left: 10px;
}
.nav-link:hover {
    text-decoration: underline;
}
.content {
    font-size: 1.1em;
    margin-top: 20px;
    color: #444;
}
img {
    margin-top: 20px;
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.back-link:hover {
    text-decoration: underline;
}

.back-link {
    position: fixed;
    top: 10px;
    right: 10px;
    background: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    color: #af7217;
    box-shadow: 0 0 5px rgba(0,0,0,0.15);
    text-decoration: none;
    z-index: 1000;
}

.photo-gallery {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 15px;
    /* margin-top: 30px; */
    margin: 0;
}
.photo-gallery img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    margin: 0;
}

@media screen and (min-width:600px) {
  body {
    padding: 20px;
  }
  .photo-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media screen and (min-width:1024px) {
  body {
    padding: 40px;
  }
   .photo-gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}
/* フッター */
footer {
    text-align: center;
    color: #777;
    font-size: 0.9rem;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #ccc;
}