:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --text: #1a1c1e;
  --muted: #5b6472;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --accent: #f59e0b;
  --border: #e5eaf3;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --surface: #1b2230;
    --text: #e6e8ee;
    --muted: #9aa4b2;
    --brand: #93b4f5;
    --brand-dark: #2563eb;
    --border: #2a3142;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.6;
}

.container { width: 100%; max-width: 920px; margin: 0 auto; padding: 0 16px; }

.site-header {
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  padding: 20px 0;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.18); font-weight: 800; font-size: 18px; letter-spacing: 0.5px;
}
.brand-title { margin: 0; font-size: 1.25rem; }
.brand-sub { margin: 2px 0 0; font-size: 0.8rem; opacity: 0.9; }
.header-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.ai-badge {
  background: rgba(255, 255, 255, 0.18); padding: 4px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 600;
}
.updated-at { font-size: 0.78rem; opacity: 0.9; }

main { padding: 24px 0 48px; }
.status { color: var(--muted); padding: 32px 4px; text-align: center; }
.status.error { color: #d14343; }
.status button {
  margin-left: 10px; padding: 6px 14px; border: 0; border-radius: 8px;
  background: var(--brand); color: #fff; cursor: pointer; font-size: 0.85rem;
}

.articles { display: grid; gap: 14px; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 18px; box-shadow: var(--shadow);
}
.card-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.source-chip {
  background: var(--brand); color: #fff; font-size: 0.72rem; font-weight: 600;
  padding: 2px 8px; border-radius: 6px;
}
.card-date { color: var(--muted); font-size: 0.76rem; }
.card-title { margin: 4px 0 8px; font-size: 1.05rem; line-height: 1.4; }
.card-title a { color: var(--text); text-decoration: none; }
.card-title a:hover { color: var(--brand); text-decoration: underline; }
.card-summary { margin: 0 0 10px; color: var(--text); font-size: 0.95rem; }
.card-summary.pending { color: var(--muted); font-style: italic; }
.card-actions { display: flex; gap: 14px; }
.card-actions a { color: var(--brand); font-size: 0.85rem; text-decoration: none; font-weight: 600; }
.card-actions a:hover { text-decoration: underline; }

.site-footer {
  border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); font-size: 0.8rem;
}
.site-footer p { margin: 4px 0; }
.muted { opacity: 0.8; }