/* trends.ai0w.com — 軽量スタイル。システムフォント・レスポンシブ・ダーク不要。 */
:root {
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #ffffff;
  --card: #f7f7f8;
  --border: #e2e2e6;
  --accent: #2b6cb0;
  --accent-bg: #ebf4ff;
  --max: 960px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
header.site .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.8rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.2rem;
}
header.site .brand { font-weight: 700; font-size: 1.1rem; color: var(--fg); }
header.site nav a { font-size: 0.95rem; margin-right: 0.2rem; }
header.site nav a.active { font-weight: 700; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.2rem 1rem 2rem;
}

h1 { font-size: 1.5rem; margin: 0.4rem 0 0.6rem; }
h2 { font-size: 1.2rem; margin: 1.6rem 0 0.6rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }

.note {
  background: var(--accent-bg);
  border: 1px solid #c3dafe;
  border-radius: 6px;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  color: #2a4365;
  margin: 0.8rem 0 1.2rem;
}
.meta { color: var(--muted); font-size: 0.85rem; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--card); font-weight: 600; white-space: nowrap; }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr:hover td { background: #fafafb; }

.commentary { color: var(--muted); font-size: 0.88rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.8rem; }
.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem 0.9rem;
  background: var(--card);
}
.card h3 { margin: 0 0 0.3rem; font-size: 1rem; }
.card .tags { margin-top: 0.4rem; }
.tag {
  display: inline-block;
  background: #edf2f7;
  border-radius: 999px;
  padding: 0.05rem 0.55rem;
  font-size: 0.75rem;
  color: #4a5568;
  margin: 0 0.25rem 0.25rem 0;
}

.chart-box { position: relative; height: 420px; max-width: 100%; }

.controls { margin: 0.6rem 0; display: flex; flex-wrap: wrap; gap: 0.4rem 0.8rem; align-items: center; }
.controls label { font-size: 0.9rem; }
input[type="search"], select {
  padding: 0.35rem 0.5rem; border: 1px solid var(--border); border-radius: 5px; font-size: 0.9rem;
}

/* 新興トピック発見フィード（§8） */
.emerging-card { display: flex; flex-direction: column; gap: 0.4rem; }
.emerging-card .why { margin: 0; font-size: 0.9rem; }
.emerging-card .badges { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.badge {
  display: inline-block;
  border-radius: 4px;
  padding: 0.05rem 0.45rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
}
.badge-arxiv { background: #b83280; }
.badge-github { background: #2d3748; }
.badge-hn { background: #c05621; }
.badge-hf { background: #b7791f; }
.emerging-card ul.sources {
  margin: 0.2rem 0 0; padding-left: 1.1rem; font-size: 0.82rem;
}
.emerging-card ul.sources li { margin: 0.1rem 0; }

footer.site {
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  background: var(--card);
}
footer.site .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem;
  font-size: 0.82rem;
  color: var(--muted);
}
footer.site a { color: var(--muted); text-decoration: underline; }

.empty { color: var(--muted); font-style: italic; padding: 0.8rem 0; }