:root {
  --bg: #f6f6f4;
  --card: #ffffff;
  --text: #1c1c1a;
  --muted: #5f5f5a;
  --line: #deded8;
  --accent: #1f5f8b;
  --accent-text: #ffffff;
  --ok: #1e6b3a;
  --warn-bg: #fff1c2;
  --warn-text: #5a4300;
  --error: #a3261b;
  --selected-bg: #e8f1f8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --card: #20201e;
    --text: #ececea;
    --muted: #a5a59f;
    --line: #3a3a37;
    --accent: #6fb0dd;
    --accent-text: #0d1a24;
    --ok: #7fd49a;
    --warn-bg: #4a3b00;
    --warn-text: #ffe9a3;
    --error: #ff8a7f;
    --selected-bg: #1b2d3a;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.banner {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 10px 16px;
  background: var(--warn-bg);
  color: var(--warn-text);
  font-weight: 700;
  text-align: center;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px 16px 48px;
}

h1 { font-size: 1.5rem; margin: 8px 0 16px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }

section, details.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  margin: 0 0 16px;
}

details.card > summary { cursor: pointer; font-weight: 700; }
details.card[open] > summary { margin-bottom: 12px; }

label { display: block; font-weight: 600; margin: 12px 0 4px; }

input {
  width: 100%;
  padding: 10px;
  font: inherit;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}

button, .button {
  display: inline-block;
  padding: 10px 16px;
  margin: 12px 8px 0 0;
  font: inherit;
  font-weight: 600;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
}

.button.primary, button.primary {
  color: var(--accent-text);
  background: var(--accent);
}

.button.big, button.big { display: block; width: 100%; margin: 12px 0 0; padding: 14px 16px; text-align: center; font-size: 1.05rem; }

.button[aria-disabled="true"], button:disabled { opacity: 0.45; cursor: not-allowed; }

button:focus-visible, .button:focus-visible, summary:focus-visible, a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.notice {
  margin: 0 0 16px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
}

.nowrap { white-space: nowrap; }

.id-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 12px; }
.id-row .id-short { font-size: 1rem; }
.id-row button { margin-top: 8px; }

fieldset.plans { border: 0; margin: 0; padding: 0; min-width: 0; }
fieldset.plans legend { font-size: 1.1rem; font-weight: 700; padding: 0; margin: 0 0 12px; }
.plan-list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.plan { position: relative; display: block; cursor: pointer; }
.plan input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; }
.plan-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 88px;
  justify-content: center;
  padding: 14px 16px;
  border: 2px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
}
.plan-label { font-size: 1.15rem; font-weight: 700; }
.plan-price { color: var(--muted); }
.plan input:checked + .plan-body { border-color: var(--accent); background: var(--selected-bg); }
.plan input:checked + .plan-body .plan-label::after { content: "  \2713"; color: var(--accent); }
.plan input:focus-visible + .plan-body { outline: 3px solid var(--accent); outline-offset: 2px; }
fieldset.plans:disabled .plan { cursor: not-allowed; opacity: 0.6; }

ol.steps { margin: 0; padding-left: 1.25rem; }

#store-more { margin-top: 12px; }
#store-more > summary { cursor: pointer; color: var(--muted); }
ol.steps li { margin: 0 0 6px; }

.mono, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  overflow-wrap: anywhere;
}

.hint { color: var(--muted); font-size: 0.9rem; margin: 4px 0; }
.status { margin: 12px 0 0; min-height: 1.5em; }
.status:empty { margin: 0; min-height: 0; }
.status.ok { color: var(--ok); }
.status.warn { color: var(--warn-text); background: var(--warn-bg); padding: 8px 10px; border-radius: 8px; }
.status.error { color: var(--error); font-weight: 600; }
.status.waiting::before { content: "\25CF  "; animation: pulse 1.2s ease-in-out infinite; }

@keyframes pulse { 50% { opacity: 0.2; } }

.qr { width: 220px; max-width: 100%; margin: 12px 0 4px; }
.qr svg { display: block; width: 100%; height: auto; border-radius: 6px; }

figure { margin: 16px 0 0; }
figcaption { color: var(--muted); font-size: 0.9rem; }

dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 12px 0 0; }
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; }

ol.history { list-style: none; padding: 0; margin: 0; }
ol.history li { padding: 10px 0; border-top: 1px solid var(--line); }
ol.history li:first-child { border-top: 0; }
ol.history .meta { color: var(--muted); font-size: 0.85rem; }