/* 아인 가이드 페이지 공통 스타일 — 메인(index.html)과 같은 색·글꼴을 쓰고, 본문은 글 읽기용으로 좁게 잡는다 */
:root {
  --green: #00FFA3;
  --green-deep: #04302A;
  --bg: #0B1220;
  --card: #131C2C;
  --card-line: #223049;
  --text: #E7ECF3;
  --muted: #8B94A5;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: "Pretendard", "Malgun Gothic", "맑은 고딕", system-ui, sans-serif;
  line-height: 1.75; font-size: 16px;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }

/* 헤더 (메인과 동일) */
header { padding: 22px 0; }
header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 19px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand small { color: var(--muted); font-weight: 400; font-size: 13px; margin-left: 2px; }
nav a { color: var(--muted); font-size: 14px; margin-left: 22px; }
nav a:hover { color: var(--green); text-decoration: none; }
nav a[aria-current] { color: var(--green); }

/* 본문 */
main { padding: 24px 0 72px; }
article { max-width: 760px; }
.crumbs { color: var(--muted); font-size: 13px; margin: 0 0 18px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--green); }
.eyebrow { color: var(--green); font-size: 13px; font-weight: 800; letter-spacing: .12em; margin: 0 0 10px; }
h1 { font-size: 36px; line-height: 1.25; margin: 0 0 14px; letter-spacing: -0.5px; text-wrap: balance; }
.lead { color: var(--muted); font-size: 17px; margin: 0 0 26px; }
.meta { color: var(--muted); font-size: 13px; margin: 0 0 34px; }
h2 { font-size: 24px; margin: 48px 0 12px; letter-spacing: -0.3px; text-wrap: balance; scroll-margin-top: 24px; }
h3 { font-size: 18px; margin: 28px 0 8px; }
p, li { word-break: keep-all; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
code {
  font-family: Consolas, "D2Coding", monospace; font-size: 14px;
  background: var(--card); border: 1px solid var(--card-line); border-radius: 6px; padding: 1px 7px;
  user-select: all;
}
kbd {
  display: inline-block; font-family: inherit; font-size: 14px; font-weight: 700;
  background: var(--card); border: 1px solid var(--card-line); border-radius: 6px; padding: 0 8px; color: var(--text);
}
img { max-width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--card-line); display: block; margin: 14px 0; }

/* 목차 */
.toc { background: var(--card); border: 1px solid var(--card-line); border-radius: 14px; padding: 16px 20px; margin: 0 0 8px; }
.toc b { display: block; margin-bottom: 6px; font-size: 14px; color: var(--muted); letter-spacing: .06em; }
.toc ol { margin: 0; padding-left: 20px; }
.toc a { color: var(--text); }

/* 단계 카드 */
.step { background: var(--card); border: 1px solid var(--card-line); border-radius: 16px; padding: 22px 24px; margin: 18px 0; }
.step h2 { margin-top: 0; }
.step .n { display: inline-block; color: var(--green-deep); background: var(--green); font-weight: 800; border-radius: 8px; padding: 0 9px; margin-right: 8px; font-size: 15px; vertical-align: 3px; }

/* 안내 상자 */
.note { border-left: 3px solid var(--green); background: rgba(0,255,163,.06); border-radius: 0 12px 12px 0; padding: 12px 16px; margin: 16px 0; }
.warn { border-left: 3px solid #F5C243; background: rgba(245,194,67,.07); border-radius: 0 12px 12px 0; padding: 12px 16px; margin: 16px 0; }
.note p, .warn p { margin: 0; }
.note p + p, .warn p + p { margin-top: 8px; }

/* 버튼 */
.btn {
  display: inline-block; border-radius: 12px; padding: 14px 26px; font-size: 16px;
  font-weight: 800; cursor: pointer; border: 0; font-family: inherit;
}
.btn.primary { background: var(--green); color: var(--green-deep); }
.btn.primary:hover { filter: brightness(1.08); text-decoration: none; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin: 22px 0 6px; }
.cta small { flex-basis: 100%; color: var(--muted); font-size: 13px; }

/* 관련 글 */
.related { margin-top: 56px; padding-top: 24px; border-top: 1px solid #16202F; }
.related ul { list-style: none; padding: 0; display: grid; gap: 10px; }
.related li { background: var(--card); border: 1px solid var(--card-line); border-radius: 12px; padding: 12px 16px; margin: 0; }
.related li span { color: var(--muted); font-size: 13px; display: block; }

/* 푸터 (메인과 동일) */
footer { border-top: 1px solid #16202F; padding: 32px 0 44px; color: var(--muted); font-size: 13px; }
footer p { margin: 6px 0; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; border-radius: 4px; }
@media (max-width: 800px) {
  h1 { font-size: 28px; }
  nav a { margin-left: 14px; }
}