:root {
  --blue: #165d7d;
  --blue-dark: #0f4863;
  --page: #f6f8fa;
  --ink: #1b2330;
  --muted: #5b6573;
  --line: #d2d8e0;
  --card: #ffffff;
  --warn-bg: #fff6de;
  --warn-ink: #7a4f0a;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.wrap { width: 100%; max-width: 40rem; margin-inline: auto; padding-inline: 1rem; }

.top { background: var(--blue); color: #fff; padding-block: 1.25rem; }
.brand { margin: 0; font-size: 1.5rem; font-weight: 750; letter-spacing: -0.01em; }
.tag { margin: 0.1rem 0 0; opacity: 0.9; }

main { padding-block: 1.25rem 2rem; }

.notice {
  margin: 0 0 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: var(--warn-bg);
  color: var(--warn-ink);
  font-size: 0.9rem;
}

h2 { margin: 1.75rem 0 0.5rem; font-size: 1.15rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem;
}

.card h2 { margin-top: 0; font-size: 1.35rem; }

.meta { display: grid; grid-template-columns: max-content 1fr; gap: 0.25rem 1rem; margin: 0.75rem 0 1rem; font-size: 0.95rem; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; }

.btn {
  display: block;
  width: 100%;
  min-height: 52px;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 650;
  text-align: center;
  text-decoration: none;
}
.btn:active, .btn:hover { background: var(--blue-dark); }
.btn:focus-visible { outline: 3px solid #7cc8ea; outline-offset: 2px; }

.notes { margin: 0.75rem 0 1rem; padding-left: 1.2rem; }

.hash {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.hash code { display: block; margin-top: 0.25rem; word-break: break-all; font: 0.8rem/1.4 ui-monospace, Consolas, monospace; color: var(--ink); }

.muted { color: var(--muted); font-size: 0.9rem; }

.history { list-style: none; margin: 0; padding: 0; }
.history li { padding: 0.75rem 0; border-top: 1px solid var(--line); }
.history li:first-child { border-top: 0; }
.history a { color: var(--blue); font-weight: 600; }
.history .when { color: var(--muted); font-size: 0.85rem; }

.preparing { text-align: center; padding-block: 2rem; }
.preparing h2 { margin: 0 0 0.5rem; }

.foot { padding-block: 1rem 2rem; border-top: 1px solid var(--line); }

@media (min-width: 40rem) {
  .btn { width: auto; display: inline-block; padding-inline: 2rem; }
}

.card .btn + h2 { margin-top: 1.5rem; }