:root {
  --bg: #f4f6f9;
  --card: #fff;
  --text: #1d2330;
  --muted: #667085;
  --border: #d5dae3;
  --accent: #053d78;
  --accent-hover: #0a4f99;
  --error-bg: #fdecec;
  --error: #a32020;
  --warn-bg: #fff6e0;
  --warn: #7a5200;
  --info-bg: #e8f1fc;
  --info: #053d78;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.7;
}

header.site {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--accent);
  color: #fff;
}
header.site a { color: #fff; text-decoration: none; }
header.site .brand { font-weight: 700; }
header.site nav { display: flex; gap: 16px; align-items: center; }
header.site nav form { margin: 0; }
header.site nav .link { color: #fff; }

main { max-width: 860px; margin: 32px auto; padding: 0 16px; }

footer.site { max-width: 860px; margin: 0 auto 32px; padding: 0 16px; text-align: center; color: var(--muted); font-size: 0.85rem; }
footer.site p { margin: 2px 0; }
footer.site a { color: inherit; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  margin-bottom: 24px;
}
.card.narrow { max-width: 560px; margin-left: auto; margin-right: auto; }
h1 { font-size: 1.35rem; margin: 0 0 12px; }

label { display: block; margin: 16px 0; font-weight: 600; }
.hint { display: block; font-weight: 400; font-size: 0.85rem; color: var(--muted); }
input, select, textarea {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  font-weight: 400;
  background: #fff;
  color: inherit;
}
/* select は line-height を無視するので、input と同じ高さ（行の高さ + 上下の余白と枠）を明示する */
select { height: calc(1.7em + 20px); }
textarea { font-family: ui-monospace, Consolas, "BIZ UDGothic", monospace; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
/* 説明文の行数が左右で違っても、入力欄の高さが揃うように下端で合わせる */
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; align-items: end; }

button, .button {
  display: inline-block;
  padding: 9px 20px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
button:hover, .button:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.6; cursor: wait; }
button.secondary, .button.secondary { background: #fff; color: var(--accent); }
button.secondary:hover, .button.secondary:hover { background: var(--info-bg); }
button.small { padding: 3px 10px; font-size: 0.85rem; }
button.link {
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font-weight: 400;
  text-decoration: underline;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.copy-row { display: flex; gap: 8px; }
.copy-row button { flex-shrink: 0; white-space: nowrap; }
.copy-row input { margin: 0; font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }

.muted { color: var(--muted); font-size: 0.9rem; }
.alert { padding: 10px 14px; border-radius: 6px; }
.alert.error { background: var(--error-bg); color: var(--error); }
.alert.warn { background: var(--warn-bg); color: var(--warn); }
.alert.info { background: var(--info-bg); color: var(--info); }
[hidden] { display: none !important; }

dl.meta { display: grid; grid-template-columns: auto 1fr; gap: 2px 16px; margin: 0 0 16px; }
dl.meta dt { color: var(--muted); }
dl.meta dd { margin: 0; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { padding: 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
td form { margin: 0; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 0.8rem; white-space: nowrap; }
.badge.pending { background: var(--info-bg); color: var(--info); }
.badge.viewed { background: #e6f5ea; color: #1d6b34; }
.badge.expired, .badge.canceled { background: #eef0f3; color: var(--muted); }
.badge.locked { background: var(--error-bg); color: var(--error); }

@media (max-width: 600px) {
  header.site { padding: 12px 16px; }
  main { margin: 16px auto; }
  .card { padding: 20px 16px; }
  .row { grid-template-columns: 1fr; }
}