:root {
  --bg: #f6f5f2; --fg: #1c1c1e; --muted: #6d6d72; --card: #ffffff; --line: #e3e1dc;
  --accent: #2f5d50; --accent-fg: #ffffff; --danger: #b3261e; --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313; --fg: #ececec; --muted: #9b9ba0; --card: #1e1e1e; --line: #333333;
    --accent: #7cc4ab; --accent-fg: #0c1d17; --danger: #f2857c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg); line-height: 1.6;
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); font-size: .9em; }
.empty { color: var(--muted); padding: 48px 0; text-align: center; grid-column: 1 / -1; }
[hidden] { display: none !important; }

header.site { border-bottom: 1px solid var(--line); background: var(--card); }
header.site .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; }
header.site .logo { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; margin-right: auto; }
main { padding: 24px 0 64px; }

input, textarea, button { font: inherit; color: inherit; }
input[type=text], input[type=number], input[type=email], input[type=password], input[type=file], textarea {
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%;
}
textarea { min-height: 80px; resize: vertical; }
label { display: grid; gap: 4px; font-size: .9rem; color: var(--muted); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-fg);
  border-radius: 8px; padding: 8px 14px; cursor: pointer; text-decoration: none; font-weight: 600; white-space: nowrap;
}
.btn.ghost { background: transparent; color: var(--accent); }
.btn.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn:disabled { opacity: .5; cursor: wait; }

.jump { display: flex; gap: 8px; }
.jump input { width: 120px; }

/* 一覧 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 16px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; text-decoration: none; color: inherit; display: flex; flex-direction: column;
  transition: transform .12s ease, box-shadow .12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgb(0 0 0 / .08); }
.thumb { aspect-ratio: 4 / 3; background: var(--line); display: grid; place-items: center; overflow: hidden; }
.thumb img, .thumb video { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-body { padding: 10px 12px 12px; display: grid; gap: 2px; }
.num { font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: .02em; }
.card .title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 詳細 */
.item-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.item-head h1 { margin: 0; font-size: 1.6rem; }
.desc { white-space: pre-wrap; margin: 0 0 24px; }
.media-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.media {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
}
.media .view { background: #000; display: grid; place-items: center; min-height: 160px; }
.media .view img, .media .view video { width: 100%; max-height: 420px; object-fit: contain; display: block; }
.media .meta { padding: 10px 12px; display: flex; align-items: center; gap: 10px; }
.media .meta .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pager { display: flex; justify-content: space-between; margin-top: 32px; }

/* 管理 */
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 20px; }
.panel h2 { margin: 0 0 12px; font-size: 1.1rem; }
.form-row { display: grid; grid-template-columns: 120px 1fr; gap: 12px; margin-bottom: 12px; }
.login { max-width: 380px; margin: 48px auto; display: grid; gap: 12px; }
details.admin-item { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; }
details.admin-item > summary { padding: 12px 16px; cursor: pointer; display: flex; gap: 10px; align-items: baseline; }
details.admin-item > .body { padding: 0 16px 16px; display: grid; gap: 16px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.admin-media { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.admin-media .media .view { min-height: 120px; }
.admin-media .media .view img, .admin-media .media .view video { max-height: 180px; }
.admin-media .meta { flex-wrap: wrap; }
.admin-media .meta .name { flex-basis: 100%; }

.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  background: var(--fg); color: var(--bg); padding: 10px 16px; border-radius: 8px;
  max-width: calc(100% - 32px); box-shadow: 0 6px 20px rgb(0 0 0 / .2); z-index: 10;
}
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 560px) {
  .form-row { grid-template-columns: 1fr; }
  .jump input { width: 90px; }
}