:root {
  /* 明るい配色（白ベース） */
  --bg: #f7f7f7;
  --fg: #111111;
  --muted: #666666;
  --card: #ffffff;
  --line: #d7d7d7;
  --ok: #1f8f52;
  --bad: #c7373c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--fg);
}
.wrap { max-width: 920px; margin: 0 auto; padding: 18px; }
h1 { margin: 6px 0 8px; font-size: 22px; }
.h2 { margin: 0 0 10px; font-size: 16px; }
.sub { margin: 0 0 14px; color: var(--muted); }
.controls { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0 6px; }
.input {
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
  border-radius: 10px;
  outline: none;
}
.input:focus { border-color: #888; }
.full { width: 100%; }
.list { display: grid; gap: 10px; margin-top: 10px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
}
.card a { color: var(--fg); text-decoration: none; }
.card a:hover { text-decoration: underline; }
.meta { color: var(--muted); font-size: 13px; display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; align-items: center; }
.tag { font-size: 12px; padding: 3px 8px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); }
.article { line-height: 1.9; }
.article p { margin: 0 0 12px; }
.back { color: var(--muted); text-decoration: none; display: inline-block; margin-top: 6px; }
.back:hover { text-decoration: underline; }
.foot { color: var(--muted); border-top: 1px solid var(--line); margin-top: 26px; padding-top: 14px; }
.state { color: var(--muted); padding: 12px 0; }

.label { display:block; font-size: 12px; color: var(--muted); margin: 10px 0 6px; }
.row { display:flex; gap:10px; align-items:center; margin-top: 10px; flex-wrap: wrap; }
.grid { display:grid; grid-template-columns: 1fr 220px; gap: 10px; }
@media (max-width: 640px) { .grid { grid-template-columns: 1fr; } }

.btn {
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
  border-radius: 10px;
  cursor: pointer;
}
.btn:hover { border-color: #888; }
.btn.primary { border-color: #888; }
.btn.ghost { opacity: 0.85; }

.hint { margin: 10px 0 0; color: var(--muted); font-size: 12px; }
.msg { padding: 10px 12px; border-radius: 10px; margin-bottom: 10px; }
.msg.ok { background: rgba(47,191,113,0.12); border: 1px solid rgba(47,191,113,0.35); }
.msg.bad { background: rgba(255,90,95,0.12); border: 1px solid rgba(255,90,95,0.35); }
.preview { color: var(--fg); line-height: 1.9; }
.preview p { margin: 0 0 10px; }

.head { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 13px; }
.nav a:hover { color: var(--fg); text-decoration: underline; }