:root {
  --blue: #1756a9;
  --blue-dark: #0e3a78;
  --blue-pale: #eaf2fc;
  --ink: #1c2733;
  --muted: #5f6f82;
  --line: #d9e2ee;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  color: var(--ink);
  background: #f5f8fc;
  line-height: 1.7;
}
.top {
  background: #04203d; /* バナー画像の地色に合わせる */
  color: #fff;
  padding: 0 0 14px;
}
.top .banner { display: block; width: 100%; height: auto; }
.top h1 { margin: 4px 16px 0; font-size: 1.35rem; }
.top .sub { margin: 0 16px; font-size: 0.8rem; letter-spacing: 0.12em; opacity: 0.85; }
.phase {
  display: inline-block;
  margin: 10px 16px 0;
  padding: 2px 10px;
  font-size: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 999px;
}
main { max-width: 760px; margin: 0 auto; padding: 16px; }
.note { font-size: 0.85rem; color: var(--muted); }
.error {
  padding: 12px 14px;
  background: #fdecec;
  border: 1px solid #f1b5b5;
  border-radius: 10px;
  color: #a02626;
}
section {
  margin: 16px 0;
  padding: 14px 16px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}
h2 { margin: 0 0 10px; font-size: 1.05rem; color: var(--blue-dark); }
h2 small { font-weight: normal; font-size: 0.8rem; color: var(--muted); margin-left: 6px; }
.ticker { margin: 0; white-space: pre-wrap; padding: 10px 12px; background: var(--blue-pale); border-radius: 10px; font-weight: 600; }
dl { margin: 0; display: grid; grid-template-columns: 9em 1fr; gap: 4px 10px; font-size: 0.9rem; }
dt { color: var(--muted); }
dd { margin: 0; word-break: break-all; }
.empty { color: #b0523a; }
.month { margin: 14px 0 4px; font-size: 0.85rem; color: var(--muted); border-bottom: 1px solid var(--line); }
.item { padding: 8px 0; border-bottom: 1px dashed var(--line); }
.item:last-child { border-bottom: 0; }
.item .head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 10px; }
.item .date { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 0.85rem; min-width: 5.5em; }
.item .title { font-weight: 600; }
.item .meta { font-size: 0.82rem; color: var(--muted); }
.item .body { margin: 4px 0 0; font-size: 0.9rem; white-space: pre-wrap; }
.tag {
  display: inline-block;
  padding: 0 8px;
  font-size: 0.72rem;
  line-height: 1.6;
  border-radius: 999px;
  background: var(--blue-pale);
  color: var(--blue-dark);
}
.tag.on { background: var(--blue); color: #fff; }
.tag.school { background: #e7f5ec; color: #1f6b3d; }
.tag.warn { background: #fde9e4; color: #a43d22; }
a { color: var(--blue); }