:root {
  color-scheme: light dark;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI Variable", "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;

  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --faint: #86868b;
  --border: rgba(0, 0, 0, 0.08);
  --field: #ffffff;
  --field-border: rgba(0, 0, 0, 0.16);
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-soft: rgba(0, 113, 227, 0.1);
  --ok: #248a3d;
  --ok-soft: rgba(36, 138, 61, 0.12);
  --warn: #b25000;
  --warn-soft: rgba(255, 149, 0, 0.14);
  --bad: #d70015;
  --bad-soft: rgba(255, 59, 48, 0.12);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.05);
  --radius: 18px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --faint: #8e8e93;
    --border: rgba(255, 255, 255, 0.1);
    --field: #2c2c2e;
    --field-border: rgba(255, 255, 255, 0.14);
    --accent: #0a84ff;
    --accent-hover: #409cff;
    --accent-soft: rgba(10, 132, 255, 0.16);
    --ok: #30d158;
    --ok-soft: rgba(48, 209, 88, 0.16);
    --warn: #ff9f0a;
    --warn-soft: rgba(255, 159, 10, 0.16);
    --bad: #ff453a;
    --bad-soft: rgba(255, 69, 58, 0.16);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.47 var(--font);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: var(--mono); font-size: 0.92em; }

.shell { max-width: 760px; margin: 0 auto; padding: 48px 16px 80px; }
.shell.narrow { max-width: 440px; padding-top: 12vh; }

header.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  background: var(--text); color: var(--bg); font-weight: 700; font-size: 15px; letter-spacing: -0.02em;
}
h1 { font-size: 28px; line-height: 1.15; letter-spacing: -0.02em; margin: 0; font-weight: 700; }
h2 { font-size: 19px; letter-spacing: -0.01em; margin: 0; font-weight: 600; }
h3 { font-size: 15px; margin: 0 0 6px; font-weight: 600; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.tabs { display: inline-flex; background: var(--field); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.tabs button {
  appearance: none; border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 13px; font-weight: 500;
  padding: 6px 14px; border-radius: 7px; cursor: pointer;
}
.tabs button[aria-selected="true"] { background: var(--card); color: var(--text); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12); }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px; margin-bottom: 16px;
}
.card-head { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 14px; }
.card-head .grow { flex: 1; min-width: 0; }
.step {
  flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 14px;
}
.step.done { background: var(--ok-soft); color: var(--ok); }

.stack > * + * { margin-top: 14px; }
.row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.row > .field { flex: 1 1 200px; }

label.field { display: block; }
label.field > span { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }
input, select {
  width: 100%; font: inherit; color: var(--text); background: var(--field);
  border: 1px solid var(--field-border); border-radius: 10px; padding: 10px 12px; outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
input.invalid { border-color: var(--bad); }
input.code { font-family: var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }
.field-error { color: var(--bad); font-size: 13px; margin-top: 6px; }

.btn {
  appearance: none; border: 0; border-radius: 980px; font: inherit; font-weight: 500; font-size: 14px;
  padding: 9px 18px; cursor: pointer; background: var(--accent); color: #fff; display: inline-flex; align-items: center; gap: 8px;
  transition: background-color 0.15s ease, opacity 0.15s ease; text-decoration: none; white-space: nowrap;
}
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn.secondary { background: var(--accent-soft); color: var(--accent); }
.btn.secondary:hover { background: var(--accent-soft); filter: brightness(1.05); }
.btn.plain { background: transparent; color: var(--accent); padding-left: 6px; padding-right: 6px; }
.btn.danger { background: transparent; color: var(--bad); padding-left: 6px; padding-right: 6px; }
.btn[disabled] { opacity: 0.5; cursor: default; }
.btn.block { width: 100%; justify-content: center; padding: 11px 18px; }

.notice { border-radius: 12px; padding: 12px 14px; font-size: 14px; }
.notice.error { background: var(--bad-soft); color: var(--bad); }
.notice.ok { background: var(--ok-soft); color: var(--ok); }
.notice.info { background: var(--accent-soft); color: var(--text); }

.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 980px; white-space: nowrap; }
.pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.bad { background: var(--bad-soft); color: var(--bad); }
.pill.idle { background: var(--accent-soft); color: var(--muted); }

.summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; font-size: 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }

ol.howto { margin: 0 0 14px; padding-left: 20px; color: var(--muted); font-size: 14px; }
ol.howto li + li { margin-top: 4px; }

.qr { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.qr .code-box { width: 196px; height: 196px; background: #fff; border-radius: 14px; padding: 10px; flex: none; }
.qr .code-box svg { width: 100%; height: 100%; display: block; }
.qr > .stack { flex: 1 1 220px; }

.list { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.list .item { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 14px; font-size: 14px; }
.list .item + .item { border-top: 1px solid var(--border); }
.list .empty { padding: 14px; color: var(--muted); font-size: 14px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
.stat { background: var(--bg); border-radius: 12px; padding: 12px 14px; }
.stat b { display: block; font-size: 22px; letter-spacing: -0.02em; }
.stat span { color: var(--muted); font-size: 12px; }

footer.bottom { margin-top: 28px; display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.hidden { display: none !important; }
.spinner {
  width: 16px; height: 16px; border-radius: 50%; border: 2px solid currentColor; border-right-color: transparent;
  animation: spin 0.8s linear infinite; display: inline-block; vertical-align: -3px;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation-duration: 0s !important; } }
@media (max-width: 520px) {
  .shell { padding-top: 28px; }
  .card { padding: 18px; }
  h1 { font-size: 24px; }
}

button.item { width: 100%; background: none; border: 0; font: inherit; color: inherit; text-align: left; cursor: pointer; }
button.item:hover { background: var(--accent-soft); }
.rounds { display: flex; flex-wrap: wrap; gap: 4px; }
.round {
  width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center;
  font-size: 11px; font-weight: 600; background: var(--bg); color: var(--faint);
}
.round.won { background: var(--ok-soft); color: var(--ok); }
.round.lost { background: var(--bad-soft); color: var(--bad); }
.table-wrap { overflow-x: auto; margin: 0 -4px; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { color: var(--muted); font-weight: 500; font-size: 12px; text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.table td { padding: 9px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.table tr:last-child td { border-bottom: 0; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table .strong { font-weight: 600; }
.table tr.squad td:first-child { font-weight: 600; }