:root {
  --bg: #ffffff; --bg2: #f2f2f2; --bg3: #e5e5e5; --fg: #0f0f0f; --fg2: #606060;
  --accent: #1a7f5a; --accent-fg: #ffffff; --chip: #f2f2f2; --chip-on: #0f0f0f; --chip-on-fg: #fff;
  --border: #e5e5e5; --badge: rgba(0,0,0,.8);
  --side-w: 220px; --top-h: 56px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0f0f; --bg2: #222; --bg3: #333; --fg: #f1f1f1; --fg2: #aaa;
    --accent: #3ccf91; --accent-fg: #0f0f0f; --chip: #272727; --chip-on: #f1f1f1; --chip-on-fg: #0f0f0f;
    --border: #303030;
  }
}
:root[data-theme="dark"] {
  --bg: #0f0f0f; --bg2: #222; --bg3: #333; --fg: #f1f1f1; --fg2: #aaa;
  --accent: #3ccf91; --accent-fg: #0f0f0f; --chip: #272727; --chip-on: #f1f1f1; --chip-on-fg: #0f0f0f;
  --border: #303030;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg);
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8;
  stroke-linecap: round; stroke-linejoin: round; flex: none; }

.top { position: fixed; inset: 0 0 auto 0; height: var(--top-h); display: flex; align-items: center;
  gap: 12px; padding: 0 16px; background: var(--bg); z-index: 20; }
.logo { font-weight: 800; font-size: 20px; letter-spacing: -.5px; white-space: nowrap; }
.logo span { color: var(--accent); }
.logo { display: inline-flex; align-items: center; }
.logo .mark { margin-right: 6px; width: 18px; height: 18px; border-radius: 50%; border: 4px solid var(--accent); box-sizing: border-box; }
.icon-btn { background: none; border: 0; color: var(--fg); padding: 8px; border-radius: 50%; cursor: pointer; }
.icon-btn:hover { background: var(--bg2); }
.search { flex: 1; max-width: 640px; margin: 0 auto; display: flex; }
.search input { flex: 1; min-width: 0; height: 40px; padding: 0 16px; font-size: 15px; color: var(--fg);
  background: var(--bg); border: 1px solid var(--bg3); border-right: 0; border-radius: 20px 0 0 20px; outline: none; }
.search input:focus { border-color: var(--accent); }
.search button { width: 60px; height: 40px; border: 1px solid var(--bg3); border-radius: 0 20px 20px 0;
  background: var(--bg2); color: var(--fg); cursor: pointer; display: grid; place-items: center; }
.search svg { width: 20px; height: 20px; }

.side { position: fixed; top: var(--top-h); bottom: 0; left: 0; width: var(--side-w); padding: 8px;
  overflow-y: auto; background: var(--bg); z-index: 15; }
.side a { display: flex; align-items: center; gap: 20px; padding: 10px 12px; border-radius: 10px; font-size: 14px; }
.side a:hover { background: var(--bg2); }
.side a.on { background: var(--bg2); font-weight: 600; }
.side hr { border: 0; border-top: 1px solid var(--border); margin: 8px 4px; }

main { margin-left: var(--side-w); padding: calc(var(--top-h) + 8px) 24px 48px; min-height: 100vh; }
.loading, .empty { color: var(--fg2); padding: 40px 0; }
h1 { font-size: 22px; margin: 8px 0 4px; }
h2 { font-size: 18px; margin: 28px 0 12px; display: flex; align-items: baseline; gap: 12px; }
h2 a.more { font-size: 13px; font-weight: 500; color: var(--accent); }
.sub { color: var(--fg2); font-size: 14px; margin: 0 0 12px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.chip { padding: 6px 12px; border-radius: 8px; background: var(--chip); font-size: 14px; border: 0;
  color: var(--fg); cursor: pointer; white-space: nowrap; }
.chip:hover { background: var(--bg3); }
.chip.on { background: var(--chip-on); color: var(--chip-on-fg); }
.chip small { color: inherit; opacity: .6; margin-left: 4px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0 16px; font-size: 14px; color: var(--fg2); }
.toolbar label { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }

.subjects { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.subject-card { border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.subject-card h3 { margin: 0 0 10px; font-size: 16px; }
.subject-card .chips { margin: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 32px 16px; }
.card { display: block; min-width: 0; }
.thumb { position: relative; aspect-ratio: 16/9; border-radius: 12px; overflow: hidden; background: var(--bg2); }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.dur { position: absolute; right: 6px; bottom: 6px; background: var(--badge); color: #fff; font-size: 12px;
  font-weight: 600; padding: 2px 5px; border-radius: 4px; }
.kind { position: absolute; left: 6px; top: 6px; background: var(--accent); color: var(--accent-fg); font-size: 11px;
  font-weight: 700; padding: 2px 6px; border-radius: 4px; }
.watched .thumb::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: #e33; }
.card h4 { margin: 10px 0 4px; font-size: 15px; line-height: 1.4; font-weight: 600;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.meta { font-size: 13px; color: var(--fg2); line-height: 1.5; }
.unit-tag { font-size: 12px; color: var(--accent); }

.watch { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 24px; }
.player { aspect-ratio: 16/9; width: 100%; border-radius: 12px; overflow: hidden; background: #000; }
.player iframe { width: 100%; height: 100%; border: 0; display: block; }
.watch h1 { font-size: 20px; margin: 12px 0 8px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.btn { display: inline-flex; gap: 6px; align-items: center; padding: 8px 14px; border-radius: 18px; border: 0;
  background: var(--chip); color: var(--fg); font-size: 14px; cursor: pointer; }
.btn:hover { background: var(--bg3); }
.btn.on { background: var(--chip-on); color: var(--chip-on-fg); }
.btn svg { width: 18px; height: 18px; }
.btn.primary { background: var(--accent); color: var(--accent-fg); }
.series-nav { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px;
  margin-top: 16px; padding: 12px 16px; border-radius: 12px; background: var(--bg2); }
.series-nav small { display: block; color: var(--fg2, inherit); opacity: .7; font-size: 12px; }
.series-nav b { font-size: 15px; }
.series-nav .actions { margin: 0; }
.series-nav .btn:not(.primary) { background: var(--bg); }
.series-h { font-size: 16px; margin: 28px 0 12px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; }
.series-h small { font-size: 13px; font-weight: 400; opacity: .65; }
.related .card { display: grid; grid-template-columns: 168px 1fr; gap: 8px; margin-bottom: 10px; }
.related .thumb { border-radius: 8px; }
.related h4 { margin: 0 0 4px; font-size: 14px; }
.related .unit-tag, .related .sep-unit { display: none; }
.about { max-width: 720px; line-height: 1.8; }
.about code { background: var(--bg2); padding: 1px 5px; border-radius: 4px; }
.chlist { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.chlist a { border: 1px solid var(--border); border-radius: 12px; padding: 14px; display: block; }
.chlist a:hover { background: var(--bg2); }
.pager { margin: 32px 0; text-align: center; }

@media (max-width: 1100px) { .watch { grid-template-columns: 1fr; } }
@media (max-width: 800px) {
  .side { transform: translateX(-100%); transition: transform .2s; box-shadow: 0 0 24px rgba(0,0,0,.2); }
  body.menu .side { transform: none; }
  main { margin-left: 0; padding: calc(var(--top-h) + 8px) 16px 48px; }
  .grid { grid-template-columns: 1fr; }
  .top { gap: 6px; padding: 0 8px; }
  .logo { font-size: 18px; }
  .search { min-width: 0; }
  .search input { padding: 0 10px; font-size: 14px; }
  .search button { width: 40px; flex: none; }
  .icon-btn { flex: none; }
  .related .card { grid-template-columns: 140px 1fr; }
}