/* Vtuber配信ランキング — 画面のスタイル。
 * Web フォントは使わない（LCP 優先・CSP font-src 'self'）。インライン style も使わない。 */

:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --bg-elev: #ffffff;
  --bg-soft: #eef0f6;
  --fg: #16171d;
  --fg-muted: #5a6072;
  --fg-faint: #6b7186;
  --line: #e1e4ee;
  --accent: #c8134e;
  --accent-soft: #fde8ef;
  --brand-a: #ff5f8f;
  --brand-b: #7c4dff;
  --up: #0b7a43;
  --up-soft: #e6f5ec;
  --down: #c5221f;
  --down-soft: #fdeceb;
  --warn-bg: #fff4d6;
  --warn-fg: #6b4b00;
  --focus: #2b6fff;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 18, 28, 0.06), 0 4px 14px rgba(16, 18, 28, 0.05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1016;
    --bg-elev: #181a22;
    --bg-soft: #20232e;
    --fg: #f1f2f7;
    --fg-muted: #a7acbd;
    --fg-faint: #8f95a8;
    --line: #2a2e3b;
    --accent: #ff6b9b;
    --accent-soft: #3a1c2a;
    --up: #3ddc84;
    --up-soft: #123524;
    --down: #ff6b66;
    --down-soft: #3b1a1a;
    --warn-bg: #3a2e0e;
    --warn-fg: #ffd978;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 14px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}
a { color: inherit; }
img { display: block; }
b, strong { font-weight: 700; }
small { font-size: 0.8em; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 14px; }

.skip {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--bg-elev); color: var(--fg); padding: 8px 12px; border-radius: 8px; box-shadow: var(--shadow);
}
.skip:focus { left: 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* ---- ヘッダー */
.site-header { background: var(--bg-elev); border-bottom: 1px solid var(--line); }
.header-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 18px; padding: 14px 14px; }
.brand { text-decoration: none; font-weight: 800; font-size: 22px; letter-spacing: 0.01em; display: inline-flex; align-items: baseline; gap: 2px; }
.brand-v { color: var(--fg); }
.brand-ikioi {
  background: linear-gradient(90deg, var(--brand-a), var(--brand-b));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-size: 1.15em; padding: 0 2px;
}
.brand-rank { color: var(--fg); }
.tagline { margin: 0; color: var(--fg-muted); font-size: 13px; }

/* ---- 状態行 */
.status { padding: 12px 0 4px; }
.status-line { margin: 0; display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 13px; color: var(--fg-muted); align-items: center; }
.status-line b { color: var(--fg); }
.status-time time { color: var(--fg); font-weight: 600; font-variant-numeric: tabular-nums; }
.status-refresh { margin-left: auto; font-size: 12px; color: var(--fg-faint); }
.status-refresh.is-busy { color: var(--accent); }
.notice { margin: 8px 0 0; padding: 8px 12px; border-radius: 8px; background: var(--bg-soft); color: var(--fg-muted); font-size: 13px; }
.notice-warn { background: var(--warn-bg); color: var(--warn-fg); }

/* ---- タブ */
.tabs { display: flex; gap: 6px; padding: 10px 0 8px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto; text-decoration: none; padding: 7px 14px; border-radius: 999px; font-weight: 600; font-size: 14px;
  background: var(--bg-elev); border: 1px solid var(--line); color: var(--fg-muted);
}
.tab.is-active { background: var(--fg); color: var(--bg); border-color: var(--fg); }
@media (prefers-color-scheme: dark) { .tab.is-active { background: #f1f2f7; color: #0f1016; border-color: #f1f2f7; } }

/* ---- 絞り込み */
.filters { display: flex; flex-direction: column; gap: 8px; padding-bottom: 10px; }
.chips { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: thin; }
.chip {
  flex: 0 0 auto; text-decoration: none; font-size: 13px; padding: 4px 10px; border-radius: 999px;
  background: var(--bg-soft); color: var(--fg-muted); border: 1px solid transparent;
}
.chip small { color: var(--fg-muted); }
.chip.is-active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.chip.is-active small { color: inherit; }
.search input {
  width: 100%; max-width: 420px; font: inherit; padding: 8px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--fg);
}

/* ---- 一覧 */
.rank { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.item {
  display: grid;
  grid-template-columns: 28px 112px minmax(0, 1fr);
  grid-template-areas: "pos thumb body" "pos stats stats";
  gap: 6px 10px;
  align-items: start;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow);
}
.item[hidden] { display: none; }
.pos { grid-area: pos; font-weight: 800; font-size: 15px; color: var(--fg-muted); font-variant-numeric: tabular-nums; text-align: center; padding-top: 2px; }
.item:nth-child(1) .pos, .item:nth-child(2) .pos, .item:nth-child(3) .pos { color: var(--accent); }
.thumb { grid-area: thumb; position: relative; display: block; width: 112px; border-radius: 8px; overflow: hidden; background: var(--bg-soft); }
.thumb img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.badge-new { position: absolute; left: 4px; top: 4px; font-size: 10px; font-weight: 800; letter-spacing: 0.05em; background: var(--accent); color: #fff; padding: 1px 6px; border-radius: 4px; }
.body { grid-area: body; min-width: 0; }
.title {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  text-decoration: none; font-weight: 700; font-size: 14px; line-height: 1.4; color: var(--fg);
}
.title:hover { text-decoration: underline; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; margin-top: 4px; font-size: 12px; color: var(--fg-muted); min-width: 0; }
.channel { display: inline-flex; align-items: center; gap: 5px; text-decoration: none; min-width: 0; max-width: 100%; }
.channel:hover .cname { text-decoration: underline; }
.cname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.avatar { width: 20px; height: 20px; border-radius: 50%; background: var(--bg-soft); flex: 0 0 auto; }
.avatar-empty { display: inline-block; }
.org { padding: 1px 7px; border-radius: 999px; background: var(--bg-soft); font-size: 11px; }
.elapsed { color: var(--fg-faint); font-variant-numeric: tabular-nums; }
.stats { grid-area: stats; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.viewers { display: inline-flex; align-items: baseline; gap: 2px; font-variant-numeric: tabular-nums; color: var(--fg-muted); }
.viewers .num { font-weight: 800; font-size: 18px; color: var(--fg); }
.viewers small { font-size: 11px; }
.viewers.is-primary .num { font-size: 22px; }
.src { color: var(--fg-faint); font-size: 11px; margin-left: 2px; cursor: help; }
.viewers-unknown { cursor: help; }
.viewers-unknown .num { font-weight: 600; font-size: 13px !important; color: var(--fg-muted); }
.delta { display: inline-flex; align-items: baseline; gap: 3px; font-variant-numeric: tabular-nums; font-weight: 700; font-size: 13px; padding: 1px 8px; border-radius: 999px; }
.delta small { font-weight: 500; font-size: 10px; }
.delta-up { color: var(--up); background: var(--up-soft); }
.delta-down { color: var(--down); background: var(--down-soft); }
.delta-flat { color: var(--fg-muted); background: var(--bg-soft); }
.delta-na { color: var(--fg-faint); background: var(--bg-soft); }
.delta-wrap.is-primary .delta { font-size: 18px; padding: 2px 10px; }
.spark { color: var(--fg-faint); flex: 0 0 auto; }
.spark-up { color: var(--up); }
.spark-down { color: var(--down); }

@media (min-width: 640px) {
  body { font-size: 16px; }
  .item {
    grid-template-columns: 36px 160px minmax(0, 1fr) auto;
    grid-template-areas: "pos thumb body stats";
    gap: 12px;
    padding: 12px;
    align-items: center;
  }
  .thumb { width: 160px; }
  .title { font-size: 15px; }
  .meta { font-size: 13px; }
  .stats { flex-direction: column; align-items: flex-end; gap: 4px; min-width: 120px; }
  .viewers .num { font-size: 20px; }
  .viewers.is-primary .num { font-size: 24px; }
  .filters { flex-direction: row; align-items: center; justify-content: space-between; gap: 12px; }
  .chips { flex: 1 1 auto; min-width: 0; }
  .search { flex: 0 0 260px; }
}

/* ---- 空・もっと見る */
.empty { text-align: center; padding: 48px 12px; background: var(--bg-elev); border: 1px dashed var(--line); border-radius: var(--radius); color: var(--fg-muted); }
.empty h2 { margin: 0 0 8px; font-size: 18px; color: var(--fg); }
.empty p { margin: 0; }
.more { text-align: center; margin: 16px 0 0; }
.button {
  display: inline-block; text-decoration: none; padding: 10px 18px; border-radius: 999px; font-weight: 700;
  background: var(--bg-elev); border: 1px solid var(--line); color: var(--fg); cursor: pointer; font: inherit;
}
.button:hover { border-color: var(--fg-muted); }
.no-match { text-align: center; color: var(--fg-muted); padding: 24px 0; }

/* ---- フッター */
.site-footer { margin-top: 36px; padding: 22px 0 40px; border-top: 1px solid var(--line); color: var(--fg-muted); font-size: 12px; }
.foot-note { margin: 0 0 8px; }
.legal { display: flex; flex-wrap: wrap; gap: 4px 0; margin-top: 10px; }
.legal a { color: var(--fg-muted); }
.legal a + a::before { content: "｜"; color: var(--fg-faint); }

/* ---- about */
.prose { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 18px; margin-top: 14px; }
.prose h1 { font-size: 22px; margin: 0 0 10px; }
.prose h2 { font-size: 16px; margin: 22px 0 6px; padding-top: 14px; border-top: 1px solid var(--line); }
.prose p, .prose li { color: var(--fg); }
.prose ul { padding-left: 1.3em; }
.prose .lead { color: var(--fg-muted); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }