/* 基本レイアウト */
:root {
  /* ライトを基準に */
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0ea5e9;
  --accent-2: #0369a1;
  --border: #e2e8f0;
  --ok: #16a34a;
  --warn: #d97706;
  --field-bg: #ffffff;
}

[data-theme="dark"] {
  --bg: #0b1020;
  --panel: #0f172a;
  --text: #e5e7eb;
  --muted: #a5b4fc;
  --accent: #0ea5e9;
  --accent-2: #22d3ee;
  --border: #1f2937;
  --ok: #22c55e;
  --warn: #f59e0b;
  --field-bg: #0a1226;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans JP, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: linear-gradient(180deg, color-mix(in oklab, var(--bg) 96%, #000 4%), color-mix(in oklab, var(--bg) 100%, #000 0%));
  color: var(--text);
}
.container { max-width: 1100px; margin: 0 auto; padding: 1rem; }
.small { font-size: 0.9rem; }

/* ヘッダー */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in oklab, var(--bg) 90%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: .75rem; }
.site-title { margin: 0.5rem 0 0; font-size: 1.6rem; letter-spacing: .02em; }
.site-subtitle { margin: .25rem 0 1rem; color: var(--muted); font-size: .95rem; }
.theme-toggle { white-space: nowrap; }

/* コントロール */
.controls { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: .75rem; box-shadow: 0 10px 40px rgba(0,0,0,.08); }
.control-row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin-bottom: .5rem; }
.input, .select { background: var(--field-bg); border: 1px solid var(--border); color: var(--text); caret-color: var(--text); padding: .6rem .75rem; border-radius: 10px; outline: none; }
.input::placeholder { color: var(--muted); }
.input:focus, .select:focus { box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 25%, transparent); border-color: var(--accent); }
.input { flex: 1 1 400px; }
.label { color: var(--muted); font-size: .9rem; }
.btn { background: var(--accent); color: #041018; border: none; padding: .55rem .8rem; border-radius: 10px; cursor: pointer; transition: transform .05s ease, filter .2s ease; font-weight: 600; }
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.muted { color: var(--muted); }
.sr-only { position: absolute; clip: rect(0, 0, 0, 0); width: 1px; height: 1px; overflow: hidden; }

/* リスト */
.list-view { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: .8rem; margin: 1rem 0 2rem; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: .9rem; display: grid; gap: .5rem; box-shadow: 0 6px 28px rgba(0,0,0,.08); }
.card h3 { margin: 0; font-size: 1.1rem; letter-spacing: .02em; }
.card .category { color: var(--accent-2); font-size: .85rem; }
.card .desc { color: var(--muted); font-size: .95rem; }
.card .tags { display: flex; gap: .4rem; flex-wrap: wrap; }
.tag { font-size: .8rem; color: var(--muted); border: 1px solid var(--border); padding: .15rem .4rem; border-radius: 999px; }
.card .actions { display: flex; gap: .5rem; }

/* 詳細 */
.detail-view { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1rem; box-shadow: 0 6px 28px rgba(0,0,0,.08); }
.detail-head { display: flex; justify-content: space-between; align-items: start; gap: .6rem; }
.detail-head h2 { margin: 0; }
.kbd { background: color-mix(in oklab, var(--bg) 85%, #000); border: 1px solid var(--border); border-bottom-width: 2px; padding: .15rem .35rem; border-radius: 6px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .85rem; color: var(--text); }
.code { background: color-mix(in oklab, var(--bg) 85%, #000); border: 1px dashed var(--border); padding: .7rem .8rem; border-radius: 10px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; overflow-x: auto; }
.example { display: grid; gap: .35rem; margin: .35rem 0 .8rem; }
.related { display: flex; gap: .4rem; flex-wrap: wrap; }

/* フッター */
.site-footer { border-top: 1px solid var(--border); margin-top: 2rem; }
.site-footer .container { display: flex; gap: .6rem; justify-content: center; color: var(--muted); }
.site-footer .copyline { padding: .75rem 0 1.25rem; opacity: .9; }

/* レスポンシブ微調整 */
@media (max-width: 640px) {
  .control-row { gap: .4rem; }
  .input { flex-basis: 220px; }
}