/* AI 문서 변환기 사용 방법. 글꼴·스크립트를 밖에서 불러오지 않는다(이 폴더만으로 열린다). */
:root {
  --bg: #ffffff;
  --panel: #f1f5f9;
  --text: #0f172a;
  --muted: #56657a;
  --line: #d6dde8;
  --accent: #2545c9;
  --accent-soft: #eef2ff;
  --warn-bg: #fff7ed;
  --warn-line: #f59e0b;
  --code-bg: #eef1f6;
  --shadow: 0 1px 2px rgba(15, 23, 42, .08), 0 6px 20px rgba(15, 23, 42, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --panel: #171d2b;
    --text: #e6eaf2;
    --muted: #a3aec2;
    --line: #2b3447;
    --accent: #9db4ff;
    --accent-soft: #1b2440;
    --warn-bg: #2a2114;
    --warn-line: #d08a16;
    --code-bg: #20283a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .5);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", "Malgun Gothic", "맑은 고딕", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 30; background: var(--bg); padding: 6px 12px; }

.top { position: sticky; top: 0; z-index: 20; background: var(--bg); border-bottom: 1px solid var(--line); }
.top-inner { max-width: 1180px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.brand img { border-radius: 7px; }
.top-sub { color: var(--muted); font-size: 15px; }
.top-inner .button { margin-left: auto; }

.button {
  display: inline-block; background: var(--accent); color: #fff; text-decoration: none; font-weight: 700;
  padding: 11px 22px; border-radius: 9px; line-height: 1.3;
}
.button.small { padding: 7px 14px; font-size: 15px; }
@media (prefers-color-scheme: dark) { .button { color: #0f1420; } }
.button:hover { filter: brightness(1.08); }

.layout { max-width: 1180px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 44px; }
.side { position: sticky; top: 61px; align-self: start; max-height: calc(100vh - 61px); overflow-y: auto; padding: 22px 0 32px; font-size: 15.5px; }
.side summary { display: none; }
.side ol { list-style: none; margin: 0 0 14px; padding: 0; }
.side li a { display: block; padding: 4px 10px; border-radius: 6px; color: var(--text); text-decoration: none; }
.side li a:hover { background: var(--accent-soft); color: var(--accent); }
.nav-group { margin: 0 0 2px; padding: 0 10px; font-size: 13px; font-weight: 700; color: var(--muted); }

main { min-width: 0; padding: 30px 0 60px; }
section { padding: 6px 0 30px; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: 0; }
h1 { font-size: 34px; line-height: 1.3; margin: 8px 0 14px; letter-spacing: -.01em; }
h2 { font-size: 27px; line-height: 1.35; margin: 34px 0 10px; letter-spacing: -.01em; }
h3 { font-size: 20px; line-height: 1.4; margin: 30px 0 8px; }
p { margin: 10px 0; }
.lead { font-size: 19px; }
.muted { color: var(--muted); font-size: 15px; margin-left: 8px; }
ul, ol { padding-left: 24px; margin: 10px 0; }
li { margin: 5px 0; }
code { font-family: Consolas, "D2Coding", Menlo, monospace; font-size: .9em; background: var(--code-bg); padding: 2px 6px; border-radius: 5px; }

.facts { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 18px 0 22px; }
.facts li { margin: 0; background: var(--panel); border-radius: 10px; padding: 12px 16px; }

/* 따라 하는 순서: 번호를 크게 */
.steps { list-style: none; counter-reset: step; padding: 0; }
.steps > li { counter-increment: step; position: relative; padding: 2px 0 2px 44px; margin: 10px 0; }
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 1px; width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent); font-weight: 700; display: grid; place-items: center; font-size: 16px;
}

figure { margin: 18px 0 20px; }
figure img { display: block; max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); }
figcaption { color: var(--muted); font-size: 15px; margin-top: 8px; }

.note { background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 8px; padding: 4px 16px; margin: 16px 0; }
.note.warn { background: var(--warn-bg); border-left-color: var(--warn-line); }

.table-wrap, table { width: 100%; }
table { border-collapse: collapse; margin: 14px 0; font-size: 16px; display: block; overflow-x: auto; }
th, td { text-align: left; vertical-align: top; padding: 9px 12px; border-bottom: 1px solid var(--line); }
th { background: var(--panel); font-size: 15px; white-space: nowrap; }
td:first-child { font-weight: 600; white-space: nowrap; }

.parts, .faq { margin: 14px 0; }
.parts dt, .faq dt { font-weight: 700; margin-top: 14px; }
.parts dd, .faq dd { margin: 2px 0 0; }
.faq dt::before { content: "Q. "; color: var(--accent); }

footer { color: var(--muted); font-size: 15px; padding-top: 24px; }

@media (max-width: 860px) {
  body { font-size: 16px; }
  .layout { display: block; padding: 0 16px; }
  .side { position: static; max-height: none; padding: 14px 0 0; }
  .side details { border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
  .side summary { display: block; font-weight: 700; cursor: pointer; padding: 4px 0; }
  .side details:not([open]) { padding-bottom: 8px; }
  .facts { grid-template-columns: 1fr; }
  h1 { font-size: 27px; }
  h2 { font-size: 23px; }
  .top-sub { display: none; }
  td:first-child { white-space: normal; }
  main { padding-top: 14px; }
}