body {
  font-family: "Hiragino Sans", sans-serif;
  background: #f5f5f5;
  margin: 30px;
}
form {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 40px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
input, textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 6px;
  margin: 5px 0;
}
button {
  background: #0078d4;
  color: #fff;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
button:hover { background: #005fa3; }
.error { color: red; font-weight: bold; }

.link {
  background: #0078d4;
  color: #fff;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
}
.link:hover { background: #005fa3; }

h1,h2{
 text-align:center;
}
.main_comment{
 text-align:center;
 margin-bottom: 5%;
}
/* グリッド */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 20px;
}
.item {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  overflow: hidden;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.item-title {
  padding: 10px;
  font-weight: bold;
  text-align: center;
  flex-grow: 1;
}
.pagination {
  margin-top: 30px;
  margin-bottom: 5%;
  text-align: center;
}
.pagination a {
  display: inline-block;
  padding: 6px 12px;
  margin: 2px;
  background: #eee;
  color: #333;
  border-radius: 6px;
  text-decoration: none;
}
.pagination a.active {
  background: #0078d4;
  color: #fff;
}
@media (max-width: 800px) {
  .grid { grid-template-columns: 1fr 1fr; }
}

.detail {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  max-width: 700px;
  margin: 0 auto;
}
img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  margin-top: 10px;
}
.back, .delete {
  display: inline-block;
  margin-top: 20px;
  background: #0078d4;
  color: #fff;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
}
.delete { background: #e74c3c; }
.back:hover { background: #005fa3; }
.delete:hover { background: #c0392b; }

/* 余白を縮小（スマホ対応） */
@media (max-width: 600px) {
  body {
    margin: 10px;
  }
}

form {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 40px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

input, textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 6px;
  margin: 5px 0;
}

button {
  background: #0078d4;
  color: #fff;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
button:hover { background: #005fa3; }

.error { color: red; font-weight: bold; }

h1,h2 {
 text-align:center;
}
.main_comment {
 text-align:center;
 margin-bottom: 5%;
}

/* ===== グリッドレイアウト ===== */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 20px;
}

/* タブレット対応 */
@media (max-width: 1024px) {
  .grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* スマホ対応 */
@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* 極小デバイス対応 */
@media (max-width: 480px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.item {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  overflow: hidden;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.item-title {
  padding: 10px;
  font-weight: bold;
  text-align: center;
  flex-grow: 1;
}

.pagination {
  margin-top: 30px;
  margin-bottom: 5%;
  text-align: center;
}
.pagination a {
  display: inline-block;
  padding: 6px 12px;
  margin: 2px;
  background: #eee;
  color: #333;
  border-radius: 6px;
  text-decoration: none;
}
.pagination a.active {
  background: #0078d4;
  color: #fff;
}

/* 詳細ページ */
.detail {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  max-width: 700px;
  margin: 0 auto;
}

/* スマホのときは内側余白を減らす */
@media (max-width: 600px) {
  .detail {
    padding: 15px;
  }
}

img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  margin-top: 10px;
}

.back, .delete {
  display: inline-block;
  margin-top: 20px;
  background: #0078d4;
  color: #fff;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
}
.delete { background: #e74c3c; }
.back:hover { background: #005fa3; }
.delete:hover { background: #c0392b; }