:root {
  --primary: #2F6FED; --primary-strong: #1E4DB0; --primary-soft: #DCE6FF; --on-primary-soft: #0B2A6B;
  --yellow: #FFD54F;
  --bg: #F8F9FC; --surface: #FFFFFF; --text: #1A1C20; --muted: #555A66; --line: #E2E6EE;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #AFC6FF; --primary-strong: #DCE6FF; --primary-soft: #1E3366; --on-primary-soft: #DCE6FF;
    --bg: #111318; --surface: #1A1D24; --text: #E3E5EC; --muted: #A4A9B6; --line: #2C313B;
  }
}
:root[data-theme="dark"] {
  --primary: #AFC6FF; --primary-strong: #DCE6FF; --primary-soft: #1E3366; --on-primary-soft: #DCE6FF;
  --bg: #111318; --surface: #1A1D24; --text: #E3E5EC; --muted: #A4A9B6; --line: #2C313B;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.7; word-break: keep-all; overflow-wrap: anywhere;
}
a { color: var(--primary); }
img { max-width: 100%; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

header.top { border-bottom: 1px solid var(--line); background: var(--surface); }
header.top .wrap { display: flex; align-items: center; gap: 10px; height: 60px; }
header.top a.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 800; font-size: 18px; }
header.top img { width: 32px; height: 32px; border-radius: 8px; }

main.doc { padding-top: 32px; padding-bottom: 56px; }
main.doc h1 { font-size: 28px; line-height: 1.3; margin: 0 0 6px; letter-spacing: -0.5px; }
main.doc .meta { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
main.doc h2 { font-size: 19px; margin: 36px 0 10px; padding-top: 4px; letter-spacing: -0.3px; }
main.doc h3 { font-size: 16px; margin: 20px 0 6px; }
main.doc p, main.doc li { font-size: 15.5px; }
main.doc ul, main.doc ol { padding-left: 22px; }
main.doc li + li { margin-top: 4px; }

.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; }
.toc ol { margin: 0; columns: 2; column-gap: 24px; font-size: 14.5px; }
@media (max-width: 560px) { .toc ol { columns: 1; } }

.table-scroll { overflow-x: auto; margin: 10px 0; }
table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 14.5px; background: var(--surface); }
th, td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; vertical-align: top; }
th { background: var(--primary-soft); color: var(--on-primary-soft); font-weight: 700; white-space: nowrap; }

.callout { background: var(--primary-soft); color: var(--on-primary-soft); border-radius: var(--radius); padding: 14px 18px; margin: 16px 0; }
.callout p { margin: 0; }
.steps { counter-reset: step; list-style: none; padding: 0 !important; }
.steps li { counter-increment: step; position: relative; padding: 12px 14px 12px 52px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.steps li + li { margin-top: 8px; }
.steps li::before { content: counter(step); position: absolute; left: 14px; top: 12px; width: 26px; height: 26px; border-radius: 50%; background: var(--primary); color: var(--bg); font-weight: 800; font-size: 14px; display: flex; align-items: center; justify-content: center; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 999px; background: var(--primary); color: #fff; font-weight: 700; text-decoration: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn { color: #0B2A6B; } }
:root[data-theme="dark"] .btn { color: #0B2A6B; }
.btn.ghost { background: transparent; color: var(--primary); border: 1.5px solid currentColor; }

footer.bottom { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 13.5px; }
footer.bottom nav { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 8px; }
footer.bottom a { color: var(--muted); }

/* ---------- 소개 페이지 ---------- */
.hero { background: linear-gradient(150deg, #3B7BFF 0%, #2F6FED 50%, #1E4DB0 100%); color: #fff; padding: 56px 0 64px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%; right: -140px; top: -180px; background: rgba(255, 213, 79, .18); }
.hero .wrap { position: relative; z-index: 1; }
.hero .app { display: flex; align-items: center; gap: 16px; }
.hero .app img { width: 72px; height: 72px; border-radius: 18px; box-shadow: 0 8px 20px rgba(8, 24, 64, .3); }
.hero .app span { font-size: 40px; font-weight: 800; letter-spacing: -1px; }
.hero h1 { font-size: 30px; line-height: 1.35; margin: 22px 0 10px; letter-spacing: -0.6px; }
.hero h1 em { font-style: normal; color: var(--yellow); }
.hero p { margin: 0 0 26px; opacity: .9; font-size: 16.5px; }
.hero .btn { background: #fff; color: #1E4DB0; }
.hero .btn svg { width: 20px; height: 20px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; padding: 40px 0 8px; }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.feature .emoji { font-size: 28px; }
.feature h2 { font-size: 18px; margin: 8px 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

.shots { display: flex; gap: 12px; overflow-x: auto; padding: 28px 0 8px; scroll-snap-type: x mandatory; }
.shots img { width: 220px; flex: none; border-radius: 16px; scroll-snap-align: start; border: 1px solid var(--line); }

.note { color: var(--muted); font-size: 14px; padding: 24px 0 8px; }