:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1a1d23;
  --muted: #5b6472;
  --line: #d8dee8;
  --accent: #1f4e79;
  --accent-2: #0f6a4b;
  --warn-bg: #fff8e8;
  --warn-ink: #6a4b00;
  --radius: 12px;
  --max: 42rem;
  --tap: 2.75rem;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  font-size: 17px;
  color: var(--ink);
  background: var(--bg);
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
}
a:focus-visible, .btn:focus-visible, summary:focus-visible {
  outline: 3px solid #7aa7d9;
  outline-offset: 2px;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 1rem; }
.wrap-narrow { max-width: 40rem; }
header.site {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  padding: calc(0.75rem + var(--safe-top)) 0 0.85rem;
}
h1 { margin: 0 0 .25rem; font-size: clamp(1.35rem, 4.5vw, 1.7rem); letter-spacing: -.02em; }
h2 { margin: 1.35rem 0 .45rem; font-size: 1.2rem; color: var(--accent); }
h3 { margin: 1rem 0 .35rem; font-size: 1.05rem; color: var(--accent-2); }
.tagline { margin: 0 0 .75rem; color: var(--muted); font-size: .95rem; }
.badge {
  display: inline-block; margin: .65rem 0 0; padding: .2rem .5rem;
  border-radius: 999px; background: #eef2f7; color: var(--muted);
  font-size: .72rem; font-weight: 600; letter-spacing: .02em; text-transform: uppercase;
}
.notice {
  margin: .75rem 0 0; padding: .7rem .85rem;
  background: var(--warn-bg); color: var(--warn-ink);
  border: 1px solid #f0d99a; border-radius: var(--radius); font-size: .95rem;
}
.meta { color: var(--muted); font-size: .92rem; margin: .35rem 0 .55rem; }
section.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1rem; margin: .85rem 0;
}
.group-label {
  margin: .85rem 0 .35rem; font-size: .78rem; font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase; color: var(--muted);
}
.actions { display: flex; flex-wrap: wrap; gap: .55rem; margin: .45rem 0 0; }
.apps { display: grid; gap: .55rem; }
@media (min-width: 520px) {
  .apps { grid-template-columns: 1fr 1fr; }
  .apps .btn { min-height: 3.1rem; font-size: 1.05rem; }
}
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: var(--tap); padding: .7rem 1.05rem; border-radius: 10px;
  border: 1px solid var(--line); text-decoration: none; font-weight: 650;
  font-size: 1rem; line-height: 1.25; color: var(--ink); background: #fff;
  -webkit-tap-highlight-color: transparent;
}
.btn-primary { background: var(--accent); color: #fff; border-color: transparent; }
.btn-primary.pom { background: var(--accent-2); }
.btn-secondary { background: #eef2f7; border-color: #d0d7e2; }
.btn-block { width: 100%; }
.guide-nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(246,247,249,.94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: calc(0.55rem + var(--safe-top)) 0 0.55rem;
}
.guide-nav .inner {
  max-width: var(--max); margin: 0 auto; padding: 0 1rem;
  display: flex; flex-wrap: wrap; gap: .45rem; align-items: center;
}
.guide-nav .btn { min-height: 2.5rem; padding: .55rem .9rem; font-size: .95rem; }
main.guide { padding-bottom: calc(2rem + var(--safe-bottom)); }
.lead { font-size: 1.05rem; }
ul, ol { padding-left: 1.25rem; margin: .4rem 0 .7rem; }
li { margin: .35rem 0; }
li > ul { margin-top: .25rem; }
table.resp {
  width: 100%; border-collapse: collapse; font-size: .95rem; margin: .6rem 0 1rem;
}
table.resp th, table.resp td {
  display: block; width: 100%; text-align: left;
  padding: .35rem .5rem; border: 1px solid var(--line);
}
table.resp thead { display: none; }
table.resp tr { display: block; margin: 0 0 .65rem; background: var(--card); border-radius: 8px; overflow: hidden; }
table.resp td::before {
  content: attr(data-label);
  display: block; font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .03em; color: var(--muted); margin-bottom: .15rem;
}
@media (min-width: 720px) {
  table.resp thead { display: table-header-group; }
  table.resp tr { display: table-row; margin: 0; border-radius: 0; }
  table.resp th, table.resp td { display: table-cell; width: auto; vertical-align: top; }
  table.resp td::before { display: none; }
}
.step {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: .85rem 1rem; margin: .65rem 0;
}
.step .n {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 1.75rem; height: 1.75rem; border-radius: 999px;
  background: var(--accent); color: #fff; font-weight: 700; font-size: .9rem; margin-right: .35rem;
}
.badge-src {
  display: inline-block; font-size: .75rem; font-weight: 700; padding: .1rem .4rem;
  border-radius: 6px; color: #fff; margin-right: .25rem;
}
.badge-src.W { background: #d9730d; }
.badge-src.D { background: #c0392b; }
.badge-src.T { background: #2e8b57; }
.badge-src.R { background: #7b3fa0; }
.badge-src.P { background: #1f5fa8; }
.badge-src.A { background: #6b6b6b; }
details.more {
  margin: .5rem 0 .85rem; border: 1px solid var(--line);
  border-radius: 10px; background: #fff; padding: .15rem .75rem .55rem;
}
details.more summary {
  cursor: pointer; font-weight: 650; min-height: var(--tap);
  display: flex; align-items: center; list-style: none;
}
details.more summary::-webkit-details-marker { display: none; }
.schematic {
  display: block; width: 100%; max-width: 28rem; height: auto;
  margin: .65rem 0; border: 1px solid var(--line); border-radius: 12px; background: #fafbfc;
}
.cap { font-size: .85rem; color: var(--warn-ink); margin: -.35rem 0 .85rem; }
footer.site {
  color: var(--muted); font-size: .88rem;
  padding: .35rem 0 calc(1.5rem + var(--safe-bottom));
}
.toc { margin: .75rem 0 1rem; padding: .75rem 1rem; background: #eef2f7; border-radius: 10px; }
.toc a { color: var(--accent); }
.stop {
  border-left: 4px solid #c0392b; background: #fdf2f0; padding: .65rem .85rem;
  border-radius: 0 10px 10px 0; margin: .75rem 0;
}