/* 들려유:무전기 소개 페이지. 외부 글꼴·스크립트 없음. 색은 앱 테마와 같다. */
:root {
  --navy: #101e35;
  --surface: #1b2c47;
  --line: #2b3f60;
  --mint: #4de4c4;
  --on-mint: #102033;
  --cyan: #5bcbfa;
  --amber: #f5c46b;
  --ink: #f5f8fc;
  --mute: #93a6c2;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--navy);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
a { color: var(--cyan); }
a:focus-visible, .btn:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--mint); color: var(--on-mint); padding: 8px 12px; }
.skip:focus { left: 8px; top: 8px; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
header.top { padding: 16px 0; border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 12px; }
header.top img { width: 36px; height: 36px; border-radius: 9px; }
header.top .name { font-weight: 700; color: var(--ink); text-decoration: none; margin-right: auto; }
header.top nav a { margin-left: 14px; font-size: 15px; }
.hero { padding: 40px 0 28px; text-align: center; }
.hero img { width: 112px; height: 112px; border-radius: 26px; }
.hero h1 { font-size: 30px; line-height: 1.3; margin: 18px 0 4px; }
.hero .en { color: var(--mute); margin: 0 0 14px; font-size: 15px; }
.hero .lead { font-size: 20px; margin: 0 0 24px; }
.btn {
  display: block;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  padding: 18px 20px;
  border-radius: 16px;
  background: var(--mint);
  color: var(--on-mint);
  font-size: 21px;
  font-weight: 800;
  text-decoration: none;
}
.btn:hover { background: #6cecd1; }
.meta { color: var(--mute); font-size: 14px; margin: 14px auto 0; max-width: 420px; }
.meta dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; text-align: left; }
.meta dt { color: var(--mute); }
.meta dd { margin: 0; color: var(--ink); }
.meta code { font-size: 12px; word-break: break-all; }
section { padding: 26px 0; border-top: 1px solid var(--line); }
h2 { font-size: 22px; margin: 0 0 12px; color: var(--amber); }
h3 { font-size: 18px; margin: 22px 0 6px; }
ol.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; }
ol.steps li { counter-increment: step; position: relative; background: var(--surface); border-radius: 14px; padding: 14px 16px 14px 56px; margin: 0 0 10px; }
ol.steps li::before {
  content: counter(step);
  position: absolute; left: 14px; top: 13px;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--mint); color: var(--on-mint);
  font-weight: 800; text-align: center; line-height: 30px;
}
ul.plain { margin: 0; padding-left: 20px; }
ul.plain li { margin: 0 0 6px; }
.card { background: var(--surface); border-radius: 14px; padding: 14px 16px; margin: 0 0 10px; }
.note { color: var(--mute); font-size: 15px; }
.doc { padding: 28px 0 8px; }
.doc h1 { font-size: 26px; line-height: 1.35; margin: 0 0 6px; }
.doc .sub { color: var(--mute); margin: 0 0 18px; font-size: 15px; }
.doc h2 { margin-top: 30px; font-size: 20px; }
.doc p, .doc li { font-size: 16px; }
.summary { background: var(--surface); border-left: 4px solid var(--mint); border-radius: 0 14px 14px 0; padding: 14px 16px; }
.summary ul { margin: 0; padding-left: 20px; }
.tablewrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--surface); font-weight: 700; }
footer { border-top: 1px solid var(--line); margin-top: 20px; padding: 22px 0 40px; color: var(--mute); font-size: 14px; }
footer p { margin: 0 0 6px; }
footer a { margin-right: 14px; }
@media (min-width: 600px) {
  .hero h1 { font-size: 36px; }
  .hero { padding-top: 56px; }
}