:root {
  --bg: #0d1117;
  --bg2: #131a23;
  --card: #161f2a;
  --line: #243040;
  --text: #e6edf3;
  --dim: #8b98a9;
  --acc: #3ddc84;
  --warn: #f5a623;
  --bad: #f0655a;
  --ok: #3ddc84;
  --caution: #f5a623;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
/* author display rules would otherwise beat the UA [hidden] rule */
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: rgba(13,17,23,.92); backdrop-filter: blur(6px); z-index: 5;
}
.brand { font-size: 15px; color: var(--dim); }
.brand strong { color: var(--text); }
.sep { color: var(--line); margin: 0 6px; }
nav a { margin-left: 18px; color: var(--dim); font-size: 14px; }
nav a:hover { color: var(--text); text-decoration: none; }
main { max-width: 880px; margin: 0 auto; padding: 34px 20px 10px; }
h1 { font-size: clamp(28px, 5vw, 42px); margin: 6px 0 10px; letter-spacing: -.5px; }
h1 em { color: var(--acc); font-style: normal; }
h2 { font-size: 24px; margin: 34px 0 14px; }
.sub { color: var(--dim); max-width: 640px; margin: 0 0 22px; font-size: 17px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 20px; margin-bottom: 18px;
}
.check-card label, .grow label { display: block; font-size: 13px; color: var(--dim); margin: 0 0 6px; }
#addr {
  width: 100%; font: 15px var(--mono); color: var(--text);
  background: var(--bg2); border: 1px solid var(--line); border-radius: 8px;
  padding: 13px 14px; margin-bottom: 14px; outline: none;
}
#addr:focus { border-color: var(--acc); }
.row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.grow { flex: 1; min-width: 160px; }
select {
  width: 100%; font: 15px system-ui; color: var(--text);
  background: var(--bg2); border: 1px solid var(--line); border-radius: 8px; padding: 12px;
}
button {
  font: 600 15px system-ui; color: #08130c; background: var(--acc);
  border: none; border-radius: 8px; padding: 13px 22px; cursor: pointer;
}
button:hover { filter: brightness(1.08); }
button:disabled { opacity: .55; cursor: wait; }
button.ghost { background: transparent; color: var(--acc); border: 1px solid var(--line); padding: 10px 16px; font-weight: 500; }
button.ghost:hover { border-color: var(--acc); filter: none; }
.status { margin-top: 12px; font-size: 14px; color: var(--dim); }
.status.bad { color: var(--bad); }
.tiny { font-size: 12.5px; color: var(--dim); }
/* verdict */
.verdict { border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; border: 1px solid var(--line); background: var(--card); }
.verdict .v-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.verdict ul { margin: 0; padding-left: 20px; color: var(--dim); }
.verdict ul li { margin: 6px 0; }
/* v1.6: the "next" line — what to DO once you know what's wrong */
.verdict .v-next {
  margin: 0 0 12px; padding: 9px 12px;
  border: 1px solid var(--line); border-left: 3px solid var(--text);
  border-radius: 8px; background: var(--bg2);
  color: var(--text); font-size: 14.5px;
}
/* v1.7: the gas-sanity line — what a transfer normally costs on THIS chain,
   so a wildly wrong wallet quote stands out instead of looking normal */
.verdict .v-gas {
  margin: 0 0 12px; padding: 9px 12px;
  border: 1px solid var(--line); border-left: 3px solid var(--dim);
  border-radius: 8px; background: var(--bg);
  color: var(--dim); font-size: 13.5px; line-height: 1.45;
}
.level-ok { border-left: 5px solid var(--ok); }
.level-caution { border-left: 5px solid var(--caution); }
.level-warn { border-left: 5px solid var(--warn); }
.level-danger { border-left: 5px solid var(--bad); }
table.details { width: 100%; border-collapse: collapse; margin-bottom: 6px; }
table.details td { padding: 9px 4px; border-bottom: 1px solid var(--line); font-size: 14.5px; }
table.details td:first-child { color: var(--dim); width: 160px; }
table.details td:last-child { font-family: var(--mono); font-size: 13.5px; word-break: break-all; }
.actions { margin: 14px 0 4px; }
/* v1.5: tip nudge at the catch moment (warn/danger verdicts) */
.nudge {
  margin: -4px 0 14px; padding: 10px 14px;
  border: 1px dashed var(--line); border-left: 4px solid var(--warn);
  border-radius: 10px; background: var(--bg2);
  color: var(--text); font-size: 14.5px;
}
.nudge a { color: var(--warn); font-weight: 600; }
.nudge[hidden] { display: none; }
/* v1.6: one-click tip amounts (catch-moment nudge + tip section) */
.tipamounts { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 2px; }
.tipbtn {
  background: transparent; color: var(--acc); border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 14px; font: 600 13.5px system-ui; cursor: pointer;
}
.tipbtn:hover { border-color: var(--acc); background: rgba(61, 220, 132, .08); filter: none; }
.tipbtn.bad { color: var(--bad); border-color: var(--bad); }
.tipbtn:disabled { opacity: .55; cursor: wait; }
#sharenote { margin-top: 8px; }
#deepgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-top: 14px; }
.cell { border: 1px solid var(--line); border-radius: 10px; padding: 12px; background: var(--bg2); }
.cell .c-name { font-size: 13px; color: var(--dim); margin-bottom: 4px; }
.cell .c-val { font-family: var(--mono); font-size: 13px; }
.cell.live { border-color: rgba(61,220,132,.5); }
.cell.dead { opacity: .8; }
.cell.err { border-color: rgba(240,101,90,.4); }
/* features */
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.feat h3 { margin: 0 0 8px; font-size: 16px; }
.feat p { margin: 0; color: var(--dim); font-size: 14px; }
/* faq */
.faq h3 { font-size: 15.5px; margin: 16px 0 4px; }
.faq p { margin: 0 0 4px; color: var(--dim); font-size: 14.5px; }
/* pro (v1.2) */
#pro h2 .price { color: var(--acc); }
#pro > p { color: var(--dim); font-size: 14.5px; max-width: 660px; }
#pro .prolist { margin: 12px 0 14px; padding-left: 20px; color: var(--dim); font-size: 14.5px; }
#pro .prolist li { margin: 4px 0; }
.probtn { font-size: 16px; padding: 13px 26px; }
/* pro modal */
.modal { position: fixed; inset: 0; background: rgba(5, 8, 12, .74); z-index: 20; display: flex; align-items: center; justify-content: center; padding: 18px; }
.modal[hidden] { display: none; }
.modal-card { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; max-width: 560px; width: 100%; }
.modal-card h3 { margin: 0 0 12px; font-size: 19px; }
.modal-card p { color: var(--dim); font-size: 14.5px; }
.modal-card strong { color: var(--text); }
.modal-x { position: absolute; top: 6px; right: 10px; background: none; border: none; color: var(--dim); font-size: 24px; line-height: 1; padding: 6px 10px; cursor: pointer; }
.modal-x:hover { color: var(--text); filter: none; }
#prohash, #buyhash {
  width: 100%; font: 13.5px var(--mono); color: var(--text);
  background: var(--bg2); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px; margin: 8px 0 12px; outline: none; word-break: break-all;
}
#prohash:focus, #buyhash:focus { border-color: var(--acc); }
/* pro buy page (pro.html) */
.dim { opacity: .72; }
/* base network setup (v1.3) */
details.base-setup {
  margin: 12px 0 2px; padding: 12px 16px;
  border: 1px dashed var(--line); border-radius: 10px; background: var(--bg2);
}
details.base-setup summary { cursor: pointer; font-weight: 600; font-size: 14px; color: var(--acc); }
details.base-setup p { color: var(--dim); font-size: 13.5px; margin: 8px 0; }
details.base-setup pre {
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px; overflow: auto; margin: 10px 0; font: 12.5px var(--mono); color: var(--text);
}
/* tip */
#tip { max-width: 840px; margin: 30px auto; }
#tip h2 { margin-top: 0; font-size: 20px; }
#tip p { color: var(--dim); font-size: 14.5px; }
.addr-line { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 10px; }
.addr-line code {
  font: 13px var(--mono); background: var(--bg2); border: 1px dashed var(--line);
  border-radius: 8px; padding: 10px 12px; word-break: break-all; flex: 1;
}
.tag { font-size: 12px; color: var(--dim); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }
footer { border-top: 1px solid var(--line); margin-top: 26px; padding: 20px; text-align: center; color: var(--dim); font-size: 13.5px; }
footer p { margin: 4px 0; }