:root {
  --bg: #f6f7f9; --card: #ffffff; --ink: #16202e; --muted: #5b6676; --line: #dfe3ea;
  --brand: #0b6e4f; --brand-ink: #ffffff; --bad: #b3261e; --bad-bg: #fdecea; --ok: #0b6e4f; --ok-bg: #e7f5ef;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #10151c; --card: #18202b; --ink: #e8edf4; --muted: #9aa6b6; --line: #2a3442;
          --brand: #3fbf93; --brand-ink: #06231a; --bad: #ff8a80; --bad-bg: #3a1a18; --ok: #3fbf93; --ok-bg: #12332a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, "Segoe UI", Roboto, Arial, sans-serif; }
a { color: var(--brand); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--card); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 20px; text-decoration: none; color: var(--ink); }
nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
nav a { text-decoration: none; }
main { padding-top: 24px; padding-bottom: 32px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 0 0 8px; }
h3 { font-size: 17px; margin: 0 0 6px; }
.lead { font-size: 18px; color: var(--muted); max-width: 70ch; }
.muted { color: var(--muted); }
.hero { padding: 24px 0 8px; }
.hero h1 { font-size: 36px; max-width: 22ch; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin: 0 0 16px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin: 16px 0; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.grid3 .card, .grid2 .card { margin: 0; }
.grid2 { margin-bottom: 16px; }
.btn { display: inline-block; background: var(--brand); color: var(--brand-ink); border: 1px solid var(--brand); border-radius: 8px;
       padding: 10px 16px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn.small { padding: 6px 12px; }
.btn.ghost { background: transparent; color: var(--brand); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
button.link { background: none; border: 0; padding: 0; color: var(--brand); font: inherit; cursor: pointer; }
form.inline { display: inline; }
.narrow { max-width: 440px; margin: 0 auto; }
.stack { display: grid; gap: 14px; }
label { font-weight: 600; }
.stack label { display: grid; gap: 6px; }
input[type=text], input[type=email], input[type=password], select {
  width: 100%; padding: 9px 10px; font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
input:focus, select:focus, button:focus, a:focus, summary:focus { outline: 2px solid var(--brand); outline-offset: 2px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.check input { margin-top: 5px; }
.error { color: var(--bad); background: var(--bad-bg); padding: 8px 12px; border-radius: 8px; }
small.error { display: block; margin-top: 4px; }
.ok { color: var(--ok); background: var(--ok-bg); padding: 8px 12px; border-radius: 8px; }
.note { color: var(--muted); }
.price { font-size: 30px; font-weight: 700; margin: 4px 0; }
.price span { font-size: 15px; font-weight: 400; color: var(--muted); }
.feat { padding-left: 18px; margin: 8px 0 0; color: var(--muted); font-size: 14px; }
.steps li { margin-bottom: 6px; }
.code { display: inline-block; padding: 8px 12px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
        font-size: 15px; overflow-wrap: anywhere; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
section.card { overflow-x: auto; }
.presets .preset { display: flex; gap: 12px; align-items: center; margin: 8px 0; }
details.group > summary { cursor: pointer; display: flex; align-items: baseline; justify-content: space-between; gap: 12px; list-style: none; }
details.group > summary::-webkit-details-marker { display: none; }
details.group > summary h2 { margin: 0; }
details.group > summary h2::before { content: "▸ "; color: var(--muted); }
details.group[open] > summary h2::before { content: "▾ "; }
details.group form { margin-top: 12px; }
.row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.row label { font-weight: 500; }
.row .field small { display: block; margin-top: 4px; font-size: 13px; overflow-wrap: anywhere; }
.row.bad { background: var(--bad-bg); margin: 0 -8px; padding-left: 8px; padding-right: 8px; border-radius: 8px; }
.row.locked label, .row.locked .field { opacity: .6; }
.row input[type=checkbox] { width: 20px; height: 20px; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px; border: 1px solid var(--line); border-radius: 999px; margin-left: 6px; }
.foot { color: var(--muted); font-size: 13px; padding-top: 8px; padding-bottom: 32px; }
@media (max-width: 640px) {
  .row { grid-template-columns: 1fr; gap: 4px; }
  .hero h1 { font-size: 28px; }
}

.qr { background: #ffffff; padding: 8px; border-radius: 8px; max-width: 100%; height: auto; }
.buy { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

.search, .rowform { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 6px 0; }
.search input, .rowform input[type=text] { width: auto; flex: 1 1 160px; }
.filters { margin: 8px 0; }
.spaced { margin-top: 12px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.prose h2 { margin-top: 1.4em; font-size: 1.05rem; }
.prose p { max-width: 70ch; }
strong.bad { color: var(--bad); }