:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #16191f;
  --ink-2: #4a5160;
  --line: #dde1e8;
  --accent: #2f6fdf;
  --accent-ink: #ffffff;
  --accent-soft: #e6eefc;
  --mark: #f5b400;
  --mark-soft: #fff5d6;
  --mock-bg: #eef1f5;
  --mock-side: #ffffff;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111318;
    --card: #1a1d24;
    --ink: #eceef2;
    --ink-2: #a9b0bd;
    --line: #2c313b;
    --accent: #6c9cff;
    --accent-ink: #0b1220;
    --accent-soft: #1d2a45;
    --mark: #f5c542;
    --mark-soft: #3a3220;
    --mock-bg: #232733;
    --mock-side: #1b1e26;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
code { font-family: ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace; font-size: .92em; }

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 3.5rem) 1rem 3rem;
}

.masthead { margin-bottom: 2rem; }
.eyebrow {
  margin: 0;
  font-size: .8rem;
  font-weight: 650;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}
h1 { margin: .2rem 0 .6rem; font-size: clamp(1.9rem, 6vw, 2.6rem); line-height: 1.15; letter-spacing: -.01em; }
.lede { margin: 0; font-size: 1.12rem; color: var(--ink-2); max-width: 38rem; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.step-num {
  width: 2.2rem; height: 2.2rem;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 700;
}
.step-body { min-width: 0; }
h2 { margin: .15rem 0 .75rem; font-size: 1.3rem; line-height: 1.25; }
h3 { margin: 1.1rem 0 .5rem; font-size: 1.05rem; }
.os-panel h3 { margin-top: 0; }
.os-panel:not([hidden]) ~ .os-panel:not([hidden]) { margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.js .os-panel[hidden] { display: none; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 2.75rem;
  padding: .6rem 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  font: inherit; font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-size: 1.08rem; padding: .75rem 1.4rem; }
.btn-primary:hover { filter: brightness(1.07); }
.btn-small { min-height: 2.25rem; padding: .35rem .85rem; font-size: .95rem; }
.btn-tiny { min-height: 1.9rem; padding: .15rem .6rem; font-size: .85rem; margin-left: .35rem; }
.btn.copied { background: var(--accent-soft); border-color: var(--accent); }
.btn-row { display: flex; flex-wrap: wrap; gap: .6rem; }

.mini { margin: 1rem 0 0; padding-left: 1.3rem; }
.mini > li { margin: .45rem 0; }
.sub { margin: .5rem 0 0; padding-left: 1.2rem; list-style: lower-alpha; }
.sub > li { margin: .45rem 0; }
.hint { color: var(--ink-2); font-size: .95rem; margin: .75rem 0 0; }

.other { margin-top: 1.5rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.other summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.other-body { padding-top: .5rem; }
.os-switch { display: flex; gap: 1rem; flex-wrap: wrap; margin: .5rem 0 0; font-size: .95rem; }
.server { margin: .5rem 0 0; display: grid; gap: .5rem; }
.server div { display: grid; grid-template-columns: 8rem 1fr; gap: .5rem; align-items: baseline; }
.server dt { color: var(--ink-2); }
.server dd { margin: 0; overflow-wrap: anywhere; }
@media (max-width: 30rem) { .server div { grid-template-columns: 1fr; gap: 0; } }

.mock { margin: .5rem 0 0; }
.mock-window {
  max-width: 22rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--mock-bg);
  box-shadow: 0 6px 24px rgba(0,0,0,.08);
}
.mock-bar { display: flex; gap: 6px; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.mock-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.mock-side { background: var(--mock-side); padding: 1rem 1.1rem 1.2rem; }
.mock-title { margin: 0; font-weight: 700; font-size: 1.05rem; }
.mock-tip { margin: .2rem 0 .9rem; font-size: .82rem; color: var(--ink-2); }
.mock-field { position: relative; margin-top: .6rem; padding: .45rem .6rem; border-radius: 8px; }
.mock-field.mark { background: var(--mark-soft); outline: 2px solid var(--mark); }
.mock-label { display: block; font-size: .8rem; color: var(--ink-2); }
.mock-value { display: block; font-size: 1.35rem; font-weight: 600; letter-spacing: .04em; font-variant-numeric: tabular-nums; }
.badge {
  position: absolute; right: .5rem; top: 50%; transform: translateY(-50%);
  background: var(--mark); color: #1b1600;
  font-size: .75rem; font-weight: 700;
  padding: .15rem .5rem; border-radius: 999px;
}
figcaption { margin-top: .5rem; font-size: .88rem; color: var(--ink-2); }

.trust {
  margin-top: 1.5rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem .5rem;
}
.trust h2 { margin-top: 0; }
.trust ul { margin: 0; padding-left: 1.2rem; }
.trust li { margin: 0 0 .75rem; }

.foot { margin-top: 2rem; color: var(--ink-2); font-size: .88rem; text-align: center; }