:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #13202e;
  --muted: #5b6b7c;
  --accent: #0f2740;
  --accent-text: #ffffff;
  --border: #dde3ea;
  --error: #b42318;
  --hint: #fff7e6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1622;
    --card: #13212f;
    --text: #e8eef4;
    --muted: #9aabbd;
    --accent: #4f9dde;
    --accent-text: #06121d;
    --border: #233445;
    --error: #ff8a80;
    --hint: #2b2410;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
main { max-width: 560px; margin: 0 auto; padding: 16px; }
main.narrow { max-width: 360px; padding-top: 12vh; text-align: center; }
.logo { border-radius: 16px; }
h1 { font-size: 1.4rem; margin: 0.4em 0; }
h2 { font-size: 1.05rem; margin: 0 0 0.8em; }
.top {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 560px; margin: 0 auto; padding: 12px 16px 0;
}
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px; margin-bottom: 16px; text-align: left;
}
.hint { background: var(--hint); }
label { display: block; font-weight: 600; margin-bottom: 6px; }
input, select {
  width: 100%; font: inherit; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
.row { display: flex; gap: 12px; }
.row label { flex: 1; }
.row input, .row select { margin-top: 4px; }
button {
  display: block; width: 100%; margin-top: 12px; padding: 12px; font: inherit; font-weight: 600;
  border: 0; border-radius: 10px; background: var(--accent); color: var(--accent-text); cursor: pointer;
}
button.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
button.link {
  width: auto; margin: 0; padding: 6px 0; background: none; color: var(--muted); font-weight: 400;
}
.status { display: grid; grid-template-columns: 1fr auto; gap: 6px 12px; margin: 0; }
.status dt { color: var(--muted); }
.status dd { margin: 0; font-weight: 600; text-align: right; }
.small { font-size: 0.875rem; color: var(--muted); }
.error { color: var(--error); margin: 8px 0 0; }