:root {
  --bg: #000000;
  --panel: #080808;
  --panel-2: #0d0d0d;
  --line: #1e1e1e;
  --ink: #ededed;
  --ink-2: #9a9a9a;
  --ink-3: #666666;
  --green: #43cb7a;
  --amber: #e9c93a;
  --red: #f43e64;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: #fff; }

header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 24px;
  height: 60px; padding: 0 32px;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
}
.brand { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600; letter-spacing: -0.02em; }
.mark { width: 14px; height: 14px; border-radius: 3px; background: #fff; }
.dim { color: var(--ink-3); font-weight: 400; }
header nav { display: flex; gap: 18px; margin-left: auto; font-size: 13px; color: var(--ink-2); }
.cta {
  font-size: 13px; font-weight: 600; padding: 6px 14px;
  background: #fff; color: #000; border-radius: 6px;
}
.cta:hover { background: #d8d8d8; color: #000; }

main { max-width: 1080px; margin: 0 auto; padding: 0 32px 80px; }

.hero { padding: 88px 0 64px; }
.pill {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 11.5px; color: var(--ink-2);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 4px 12px; margin-bottom: 22px;
  font-family: var(--mono);
}
.dot { width: 5px; height: 5px; border-radius: 50%; background: var(--ink-3); }
.dot.on { background: var(--green); box-shadow: 0 0 8px -2px var(--green); }

h1 {
  font-size: 44px; line-height: 1.12; letter-spacing: -0.035em;
  font-weight: 600; margin-bottom: 20px;
}
.lede { font-size: 16px; color: var(--ink-2); max-width: 680px; line-height: 1.65; }

.actions { display: flex; gap: 10px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 18px; border-radius: 7px; font-size: 13.5px;
  border: 1px solid var(--line); color: var(--ink);
  background: transparent; cursor: pointer; font-family: inherit;
  transition: background 0.12s, border-color 0.12s;
}
.btn:hover { background: var(--panel-2); border-color: #2e2e2e; }
.btn.solid { background: #fff; color: #000; border-color: #fff; font-weight: 600; }
.btn.solid:hover { background: #d8d8d8; }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  margin-top: 56px; border: 1px solid var(--line);
  border-radius: 10px; overflow: hidden; background: var(--line);
}
.stats > div { background: var(--panel); padding: 18px 20px; display: flex; flex-direction: column; gap: 2px; }
.stats b { font-family: var(--mono); font-size: 26px; font-weight: 600; letter-spacing: -0.02em; }
.stats span { font-size: 11.5px; color: var(--ink-3); }
@media (max-width: 720px) { .stats { grid-template-columns: repeat(2, 1fr); } }

section { padding: 56px 0; border-top: 1px solid var(--line); }
h2 { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 8px; }
.sub { color: var(--ink-2); font-size: 14px; max-width: 660px; margin-bottom: 28px; }

.steps { display: flex; flex-direction: column; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 16px; background: var(--panel); padding: 22px 24px; }
.step .n {
  width: 26px; height: 26px; display: grid; place-items: center;
  border-radius: 50%; border: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
}
.step h3 { font-size: 14.5px; font-weight: 600; margin-bottom: 5px; }
.step p { font-size: 13px; color: var(--ink-2); max-width: 620px; }
pre {
  margin-top: 12px; padding: 11px 14px;
  background: #030303; border: 1px solid var(--line); border-radius: 7px;
  overflow-x: auto;
}
code { font-family: var(--mono); font-size: 12px; color: var(--ink-2); }

.link { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
input {
  flex: 1; min-width: 200px;
  background: var(--panel-2); color: var(--ink);
  border: 1px solid var(--line); border-radius: 7px;
  padding: 9px 12px; font-family: var(--mono); font-size: 13px;
}
input:focus { outline: none; border-color: #3a3a3a; }
.result { margin-top: 9px; font-size: 12.5px; color: var(--ink-3); }
.result.ok { color: var(--green); }
.result.bad { color: var(--red); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 820px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 22px; }
.card h3 { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 13px; color: var(--ink-2); line-height: 1.65; }

.table-wrap { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
th {
  text-align: left; padding: 11px 16px; font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--ink-3); background: var(--panel-2);
  border-bottom: 1px solid var(--line); font-weight: 600;
}
td { padding: 11px 16px; border-bottom: 1px solid var(--line); color: var(--ink-2); }
tr:last-child td { border-bottom: none; }
td.mono, .mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.empty { text-align: center; color: var(--ink-3); padding: 32px; }
.chip {
  display: inline-block; padding: 1px 8px; border-radius: 999px;
  border: 1px solid var(--line); font-size: 10.5px; font-family: var(--mono);
}
.chip.on { color: var(--green); border-color: #1e3a2b; }
.chip.off { color: var(--ink-3); }

.faq { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
details { background: var(--panel); }
details + details { border-top: 1px solid var(--line); }
summary {
  padding: 14px 18px; cursor: pointer; font-size: 13.5px; color: var(--ink-2);
  list-style: none; display: flex; justify-content: space-between;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--ink-3); font-family: var(--mono); font-size: 11px; }
details[open] summary::after { content: "−"; }
details[open] summary { color: var(--ink); }
details p { padding: 0 18px 16px; font-size: 13px; color: var(--ink-3); line-height: 1.7; max-width: 760px; }

footer {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  max-width: 1080px; margin: 0 auto; padding: 28px 32px 48px;
  border-top: 1px solid var(--line);
  font-size: 12px; color: var(--ink-3);
}
footer a { color: var(--ink-2); }

::selection { background: #3a3a3a; color: #fff; }

.note-small {
  margin-top: 10px;
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.65;
  max-width: 620px;
}
.note-small code {
  font-family: var(--mono);
  font-size: 11.5px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 5px;
}