:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --surface: #121820;
  --surface-2: #18212b;
  --line: #293542;
  --text: #e8edf2;
  --muted: #9aa8b5;
  --accent: #80e1b1;
  --accent-dim: #143c2e;
  --warning: #f2c879;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
}

.shell {
  width: min(100% - 40px, 980px);
  margin-inline: auto;
}

.hero {
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(145deg, #0c1218 0%, #101c1a 100%);
}

.eyebrow,
.section-label {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: .74rem;
  font-weight: 750;
  letter-spacing: .15em;
}

h1, h2, h3, p { margin-top: 0; }

h2 small,
h3 small {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: .48em;
  font-weight: 550;
  letter-spacing: .01em;
}

h1 {
  margin-bottom: 14px;
  font-size: clamp(2.8rem, 9vw, 5.4rem);
  line-height: 1;
  letter-spacing: -.055em;
}

h2 {
  margin-bottom: 24px;
  font-size: clamp(1.65rem, 4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -.025em;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.lead {
  max-width: 670px;
  color: var(--muted);
  font-size: 1.1rem;
}

.lead span {
  display: block;
  margin-top: 6px;
  font-size: .92em;
}

.en {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: .92em;
  line-height: 1.55;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.badges span {
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.025);
  color: #c8d2dc;
  font-size: .82rem;
}

main > section { padding: 64px 0; }
main > section + section { border-top: 1px solid var(--line); }

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.intro {
  display: grid;
  grid-template-columns: minmax(190px, .65fr) 1.35fr;
  gap: 36px;
  margin: 64px 0 0;
}

.intro h2,
.intro p { margin-bottom: 0; }

.policy-note {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.policy-note > strong { color: var(--accent); }

.policy-note p { margin-top: 7px; }

.join-grid,
.two-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.endpoint,
.form-link {
  display: flex;
  min-height: 112px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  flex-direction: column;
  justify-content: space-between;
}

.endpoint span,
.form-link span {
  color: var(--muted);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.endpoint code {
  overflow-wrap: anywhere;
  color: var(--accent);
  font-size: 1.08rem;
}

.form-link {
  color: var(--text);
  text-decoration: none;
}

.form-link:hover { border-color: var(--accent); }
.form-link strong { color: var(--accent); }

.text-link {
  color: var(--accent);
  text-decoration-color: rgba(128,225,177,.45);
  text-underline-offset: 3px;
}

.text-link:hover { text-decoration-color: currentColor; }

.steps {
  display: grid;
  gap: 0;
  margin: 28px 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.steps li > span,
.rules li > span {
  color: var(--accent);
  font: 700 .78rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.notice {
  padding: 18px 20px;
  border-left: 3px solid var(--warning);
  background: #201d17;
  color: #d9d0be;
}

.notice strong { color: var(--warning); }
.notice p { margin: 3px 0 0; }
.notice .en { color: #b9b1a2; }

.two-columns .card p { margin-bottom: 0; color: var(--muted); }
.two-columns .wide { grid-column: 1 / -1; }

.rules {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.rules li {
  display: grid;
  grid-template-columns: 48px 1fr;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.rules p { margin: 0; }

.rules em,
.command-list p > span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: .9em;
  font-style: normal;
}

.command-list {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.command-list > div {
  display: grid;
  grid-template-columns: minmax(275px, .9fr) 1.1fr;
  gap: 24px;
  padding: 17px 20px;
  background: var(--surface);
}

.command-list > div + div { border-top: 1px solid var(--line); }

code {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  color: var(--accent);
}

.command-list p { margin: 0; color: var(--muted); }

.section-intro {
  max-width: 760px;
  margin-bottom: 6px;
}

.addition-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.addition-grid .card p { margin-bottom: 0; }
.addition-grid .card .en { margin-top: 9px; }

.settings {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--line);
}

.settings div {
  display: flex;
  min-height: 120px;
  padding: 17px;
  background: var(--surface);
  flex-direction: column;
}

.settings span,
.settings small {
  color: var(--muted);
  font-size: .75rem;
}

.settings strong {
  margin: auto 0 2px;
  color: var(--accent);
  font-size: 1.02rem;
}

.settings .setting-featured { min-height: 148px; }

.settings em {
  margin-top: 9px;
  color: #bdc9d3;
  font-size: .72rem;
  font-style: normal;
  line-height: 1.45;
}

.settings em span { font-size: inherit; }

.settings-note {
  margin: 16px 2px 0;
  color: var(--muted);
  font-size: .82rem;
}

.settings-note span {
  display: block;
  margin-top: 2px;
}

footer {
  padding: 30px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .85rem;
}

@media (max-width: 680px) {
  .shell { width: min(100% - 28px, 980px); }
  .hero { padding: 60px 0 50px; }
  main > section { padding: 48px 0; }
  .intro {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 48px;
  }
  .join-grid,
  .two-columns,
  .addition-grid { grid-template-columns: 1fr; }
  .two-columns .wide { grid-column: auto; }
  .settings { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .command-list > div {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}