:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-inset: #0b0f14;
  --line: #262d36;
  --line-soft: #1c232c;
  --fg: #e6edf3;
  --fg-dim: #8b949e;
  --fg-faint: #6e7681;
  --accent: #4493f8;
  --ok: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 20px 80px;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.masthead {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 0 8px;
}

.masthead h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.01em;
}

.sub {
  margin: 6px 0 0;
  color: var(--fg-dim);
  font-size: 13px;
}

main {
  max-width: 880px;
  margin: 0 auto;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px 22px;
  margin: 18px 0;
}

.card[hidden] { display: none; }

.card h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 600;
}

.idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  border-radius: 6px;
  background: var(--bg-inset);
  border: 1px solid var(--line);
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
}

.hint {
  margin: 0 0 14px;
  color: var(--fg-dim);
  font-size: 13px;
  line-height: 1.7;
}

.hint.tight { margin-bottom: 4px; }

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--bg-inset);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1px 5px;
  word-break: break-all;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.row.spacer { margin-top: 16px; }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #21262d;
  color: var(--fg);
  font-family: inherit;
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 7px;
  cursor: pointer;
  transition: background .12s, border-color .12s, opacity .12s;
}

.btn:hover:not(:disabled) { background: #2a3038; border-color: #3a424c; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #06121f;
  font-weight: 600;
}

.btn.primary:hover:not(:disabled) { background: #62a8f8; border-color: #62a8f8; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--bad); }
.btn.danger:hover:not(:disabled) { background: rgba(248,81,73,.1); border-color: var(--bad); }

.inline-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--fg-dim);
  font-size: 13px;
}

select, textarea {
  background: var(--bg-inset);
  border: 1px solid var(--line);
  color: var(--fg);
  font-family: inherit;
  font-size: 13px;
  border-radius: 6px;
  padding: 6px 9px;
}

select:focus, textarea:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.field { display: block; margin: 16px 0 10px; }

.field > span {
  display: block;
  margin-bottom: 6px;
  color: var(--fg-dim);
  font-size: 13px;
}

textarea { width: 100%; resize: vertical; font-family: var(--mono); }

.env, .kv { margin: 0; }

.env > div, .kv > div {
  display: flex;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: baseline;
}

.env > div:last-child, .kv > div:last-child { border-bottom: 0; }

.env dt, .kv dt {
  flex: 0 0 128px;
  color: var(--fg-dim);
  font-size: 13px;
  margin: 0;
}

.env dd, .kv dd {
  flex: 1;
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  word-break: break-all;
}

.kv.small dt { flex-basis: 96px; }
.kv.small dd { font-size: 12px; }

.yes { color: var(--ok); }
.no { color: var(--bad); }
.part { color: var(--warn); }
.dim { color: var(--fg-faint); }

.out {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--bg-inset);
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: 7px;
  font-size: 13px;
}

.out[hidden] { display: none; }

.out h3 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
}

.out p { margin: 6px 0; color: var(--fg-dim); }

.out .big {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
  word-break: break-all;
  padding: 8px 10px;
  background: #070a0e;
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  margin: 4px 0 10px;
}

.out .note { color: var(--fg-faint); font-size: 12px; }

.verdict {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid var(--line);
  color: var(--fg-dim);
  white-space: nowrap;
}

.verdict:empty { display: none; }
.verdict.ok { color: var(--ok); border-color: rgba(63,185,80,.4); background: rgba(63,185,80,.1); }
.verdict.no { color: var(--bad); border-color: rgba(248,81,73,.4); background: rgba(248,81,73,.1); }

.cmp {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  font-family: var(--mono);
  margin: 4px 0 12px;
}

.cmp th, .cmp td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.cmp th {
  color: var(--fg-dim);
  font-weight: 500;
  font-family: var(--sans);
  font-size: 12px;
  border-bottom-color: var(--line);
}

.cmp td.name { font-family: var(--sans); color: var(--fg); white-space: nowrap; }
.cmp .fp { word-break: break-all; color: var(--fg-dim); }

.qrwrap {
  display: flex;
  gap: 22px;
  margin-top: 16px;
  padding: 18px;
  background: var(--bg-inset);
  border: 1px solid var(--line);
  border-radius: 8px;
  flex-wrap: wrap;
}

.qrwrap[hidden] { display: none; }

.qrbox {
  background: #fff;
  padding: 12px;
  border-radius: 8px;
  line-height: 0;
  flex: 0 0 auto;
}

.qrbox img, .qrbox canvas {
  display: block;
  width: 220px;
  height: 220px;
  image-rendering: pixelated;
}

.qrmeta { flex: 1 1 260px; min-width: 0; }

.url {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  word-break: break-all;
  margin-bottom: 12px;
}

.scanwrap {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.scanwrap[hidden] { display: none; }

.scanwrap video {
  width: 100%;
  max-width: 420px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #000;
}

.foot {
  max-width: 880px;
  margin: 28px auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  color: var(--fg-faint);
  font-size: 12px;
}

.foot p { margin: 0; }

body.compact { padding-bottom: 40px; }
body.compact .masthead { padding-top: 24px; }

.step {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: flex-start;
}

.step:last-child { border-bottom: 0; }

.step .n {
  flex: 0 0 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg-inset);
  border: 1px solid var(--line);
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.step .t { flex: 1; min-width: 0; }

@media (max-width: 620px) {
  body { padding: 0 14px 60px; }
  .card { padding: 16px; }
  .qrbox img, .qrbox canvas { width: 180px; height: 180px; }
  .env dt, .kv dt { flex-basis: 100px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}