/* Merzo practice wallet check. System fonts only (no external fonts under the CSP).
   Tone follows lobby-app/operators.html: deep teal-black, the company teal accent.
   No text under 16px anywhere. */
:root {
  --bg: #03151b;
  --bg-2: #07222a;
  --card: rgb(7 34 42 / 0.9);
  --card-brd: rgb(37 220 227 / 0.28);
  --ink: #f1f8f9;
  --ink-muted: #b4c8cc;
  --accent: #25dce3;
  --pass: #3ee08f;
  --warn: #ffbf47;
  --fail: #ff6b6b;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --r: 16px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(900px 600px at 50% 0%, var(--bg-2) 0%, var(--bg) 100%) no-repeat, var(--bg);
  color: var(--ink);
  font: 400 18px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
.wrap { width: min(760px, 100%); margin: 0 auto; padding: 24px 16px 40px; }

.top { padding: 8px 4px 20px; }
.brand { margin: 0 0 10px; font: 700 16px/1 var(--mono); letter-spacing: 0.3em; color: var(--accent); }
h1 { margin: 0; font-size: clamp(30px, 6vw, 44px); line-height: 1.1; font-weight: 800; letter-spacing: -0.02em; }
.lead { margin: 12px 0 0; font-size: 20px; color: var(--ink); }
.note { margin: 6px 0 0; color: var(--ink-muted); }

.card {
  background: var(--card);
  border: 1px solid var(--card-brd);
  border-radius: var(--r);
  padding: 20px 18px;
  margin: 0 0 16px;
}
.card h2 { margin: 0 0 8px; font-size: 22px; line-height: 1.25; font-weight: 750; display: flex; align-items: center; gap: 10px; }
.card p { margin: 0 0 12px; }
.card p:last-child { margin-bottom: 0; }
.step {
  flex: none;
  display: inline-grid; place-items: center;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent); color: var(--bg);
  font-size: 18px; font-weight: 800;
}
.muted, .hint { color: var(--ink-muted); }
.hint { margin: -4px 0 14px; font-size: 16px; }

/* Copy rows */
.copy-row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "label btn" "value btn";
  column-gap: 12px;
  align-items: center;
  padding: 12px 0;
  border-top: 1px solid rgb(180 200 204 / 0.18);
}
.copy-row:first-of-type { border-top: 0; }
.copy-label { grid-area: label; font-size: 16px; color: var(--ink-muted); }
.copy-value { grid-area: value; font: 500 18px/1.4 var(--mono); color: var(--ink); overflow-wrap: anywhere; word-break: break-all; }
.btn-copy { grid-area: btn; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 10px 18px;
  border-radius: 12px; border: 2px solid var(--accent);
  background: transparent; color: var(--ink);
  font: 700 18px/1.1 var(--font); text-decoration: none; cursor: pointer;
}
.btn:hover { background: rgb(37 220 227 / 0.12); }
.btn:focus-visible, input:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-copy { min-width: 84px; font-size: 16px; padding: 8px 14px; }
.btn-wide { width: 100%; }
.btn-go {
  width: 100%; min-height: 64px; margin-top: 4px;
  background: var(--accent); color: var(--bg); border-color: var(--accent);
  font-size: 22px; font-weight: 800;
}
.btn-go:hover { background: #5ce8ed; }
.langs { display: grid; grid-template-columns: repeat(auto-fit, minmax(88px, 1fr)); gap: 10px; margin: 4px 0 16px; }
.langs .btn { min-width: 0; padding-inline: 10px; }

/* Form */
.field { display: block; margin: 0 0 12px; font-weight: 700; }
input {
  display: block; width: 100%; margin-top: 6px;
  min-height: 52px; padding: 12px 14px;
  border-radius: 12px; border: 2px solid rgb(180 200 204 / 0.35);
  background: #021015; color: var(--ink);
  font: 400 18px/1.3 var(--mono);
}
input::placeholder { color: rgb(180 200 204 / 0.6); }
.runs { margin: 12px 0 0; text-align: center; color: var(--ink-muted); }

/* Messages */
.msg { border-width: 2px; }
.msg h2 { font-size: 22px; }
.msg-info { border-color: var(--pass); }
.msg-info h2 { color: var(--pass); }
.msg-warn { border-color: var(--warn); }
.msg-warn h2 { color: var(--warn); }
.msg-fail { border-color: var(--fail); }
.msg-fail h2 { color: var(--fail); }
.ended h2 { font-size: 26px; }

/* Results */
.checks { list-style: none; margin: 8px 0 0; padding: 0; }
.check { display: grid; grid-template-columns: 40px 1fr; gap: 12px; padding: 14px 0; border-top: 1px solid rgb(180 200 204 / 0.18); }
.check:first-child { border-top: 0; }
.mark {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 50%;
  font-size: 20px; font-weight: 900; color: var(--bg);
}
.check-pass .mark { background: var(--pass); }
.check-warn .mark { background: var(--warn); }
.check-fail .mark { background: var(--fail); }
.check-not-run .mark { background: #5d7479; }
.check-not-run .check-title { color: var(--ink-muted); }
.check-not-run .fix { color: var(--ink-muted); }
.check-title { margin: 4px 0 0; font-weight: 600; }
.check-pass .check-title { color: var(--ink-muted); font-weight: 400; }
.fix { margin: 8px 0 0; overflow-wrap: anywhere; }
.fix b { color: var(--warn); }
.check-fail .fix b { color: var(--fail); }
details { margin-top: 8px; }
summary { cursor: pointer; color: var(--accent); font-size: 16px; font-weight: 700; min-height: 32px; }
pre {
  margin: 8px 0 0; padding: 12px; border-radius: 10px;
  background: #021015; color: var(--ink-muted);
  font: 400 16px/1.45 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere;
}

/* Key */
.key { border: 2px solid var(--pass); }
.shout { font-size: 20px; font-weight: 800; color: var(--warn); }
.howto { margin: 14px 0 0; padding-left: 22px; }
.howto li { margin: 0 0 6px; }
code { font-family: var(--mono); }
.howto code { color: var(--accent); }
a { color: var(--accent); }

.offscreen { position: fixed; left: -9999px; top: 0; }
.foot { margin-top: 24px; text-align: center; color: var(--ink-muted); font-size: 16px; }

@media (min-width: 900px) {
  .wrap { padding-top: 48px; }
  .card { padding: 24px 28px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Guide */
[data-page="guide"] .card h3 { margin: 24px 0 8px; font-size: 21px; line-height: 1.3; }
[data-page="guide"] .card h4 { margin: 18px 0 6px; font-size: 19px; line-height: 1.3; }
[data-page="guide"] .card ol, [data-page="guide"] .card ul { margin: 0 0 12px; padding-left: 22px; }
[data-page="guide"] .card li { margin: 0 0 6px; }
[data-page="guide"] .card li > ul { margin: 6px 0 0; }
[data-page="guide"] code { overflow-wrap: anywhere; }
[data-page="guide"] pre { margin: 0 0 12px; }
[data-page="guide"] [id] { scroll-margin-top: 12px; }
.table-wrap { overflow-x: auto; margin: 0 0 12px; }
.table-wrap table { border-collapse: collapse; width: 100%; font-size: 16px; }
.table-wrap th, .table-wrap td { padding: 8px 10px; text-align: left; vertical-align: top; border-top: 1px solid rgb(180 200 204 / 0.18); }
.table-wrap th { color: var(--ink-muted); border-top: 0; }
/* A phone has no room for columns: each row becomes a block, each cell under its column's name (data-label). */
@media (max-width: 699px) {
  .table-wrap table, .table-wrap tbody, .table-wrap tr, .table-wrap td, .table-wrap tbody th { display: block; width: auto; }
  .table-wrap thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .table-wrap tr { padding: 10px 0; border-top: 1px solid rgb(180 200 204 / 0.18); }
  .table-wrap tbody tr:first-child { border-top: 0; }
  .table-wrap td, .table-wrap tbody th { padding: 2px 0; border-top: 0; }
  .table-wrap td::before, .table-wrap tbody th::before { content: attr(data-label); display: block; color: var(--ink-muted); font-weight: 700; }
}