/* 둘이모아(Coupledger) 웹 — 글꼴은 폰·컴퓨터에 깔린 것만(바깥 요청 0) · 폭 360 에서 가로 스크롤 0 */
:root {
  --ink: #1f2430;
  --sub: #5b6475;
  --line: #e3e6ec;
  --soft: #f5f7fa;
  --brand: #e2557a;
  --warn: #b3261e;
  --ok: #1b7f4b;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font: 16px/1.7 system-ui, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", "Segoe UI", Roboto, sans-serif;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
header, main, footer { max-width: 44rem; margin: 0 auto; padding: 0 1rem; }
header { padding-top: 1rem; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.brand small { color: var(--sub); font-weight: 400; margin-left: .35rem; }
nav ul { list-style: none; margin: .5rem 0 .75rem; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem .9rem; }
nav a { color: var(--sub); text-decoration: none; font-size: .95rem; }
nav a[aria-current="page"] { color: var(--brand); font-weight: 600; }
main { padding-top: .5rem; padding-bottom: 2rem; }
h1 { font-size: 1.5rem; line-height: 1.35; margin: 1.2rem 0 .6rem; }
h2 { font-size: 1.15rem; line-height: 1.4; margin: 1.8rem 0 .5rem; }
h3 { font-size: 1rem; margin: 1.2rem 0 .4rem; }
p, li { margin: .4rem 0; }
ul, ol { padding-left: 1.3rem; }
a { color: #2f5bd3; }
.lead { color: var(--sub); }
.note { background: var(--soft); border-radius: .6rem; padding: .7rem .9rem; margin: .8rem 0; }
.table { overflow-x: auto; margin: .6rem 0; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { border: 1px solid var(--line); padding: .45rem .55rem; text-align: left; vertical-align: top; }
th { background: var(--soft); font-weight: 600; }
footer { border-top: 1px solid var(--line); padding-top: 1rem; padding-bottom: 2rem; color: var(--sub); font-size: .9rem; }
/* 지우기 폼 */
form { margin: 1rem 0; }
fieldset { border: 1px solid var(--line); border-radius: .6rem; padding: .6rem .9rem; margin: .8rem 0; }
legend { font-weight: 600; padding: 0 .3rem; }
label { display: block; margin: .45rem 0; }
.choice { display: flex; gap: .5rem; align-items: flex-start; }
.choice input { margin-top: .4rem; flex: none; }
input[type="text"] {
  width: 100%; max-width: 20rem; font: inherit; padding: .55rem .65rem;
  border: 1px solid #b9c0cc; border-radius: .5rem; letter-spacing: .04em;
}
button {
  font: inherit; font-weight: 600; color: #fff; background: var(--warn); border: 0;
  border-radius: .6rem; padding: .7rem 1.2rem; min-height: 44px; cursor: pointer;
}
button[disabled] { opacity: .55; cursor: default; }
.result { margin: 1rem 0; padding: .8rem .9rem; border-radius: .6rem; border: 1px solid var(--line); }
.result[hidden] { display: none; }
.result.ok { border-color: var(--ok); }
.result.bad { border-color: var(--warn); }
[hidden] { display: none !important; }