:root {
  --night: #0e0b20;
  --violet-900: #1d1545;
  --violet-700: #3a2a86;
  --violet-500: #6b4dff;
  --gold: #ffd166;
  --paper: #f6f5fb;
  --card: #ffffff;
  --line: #e2ddf2;
  --ink: #1b1730;
  --muted: #5b5672;
  --link: #4b32c7;
  --radius: 14px;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color-scheme: light;
}
:lang(ko) { --body: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html:lang(ko) { word-break: keep-all; }
body { margin: 0; font: 400 1.0625rem/1.7 var(--body); color: var(--ink); background: var(--paper); min-height: 100vh; display: flex; flex-direction: column; overflow-x: hidden; }
main { flex: 1; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 0.18em; overflow-wrap: anywhere; }
a:hover { color: var(--violet-500); }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.3; letter-spacing: -0.01em; text-wrap: balance; }
p { margin: 0 0 1em; }
.wrap { width: 100%; max-width: 860px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }
.skip { position: absolute; left: 12px; top: -60px; z-index: 10; padding: 10px 16px; background: var(--gold); color: var(--ink); border-radius: 10px; font-weight: 700; }
.skip:focus { top: 12px; }

/* Header */
.site-header { background: var(--night); color: #fff; border-bottom: 2px solid var(--violet-500); }
.bar { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 12px; min-height: 60px; padding-top: 8px; padding-bottom: 8px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 800; font-size: 1.1rem; margin-right: auto; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.brand:hover { color: var(--gold); }
.site-nav ul, .footer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; }
.site-nav ul { gap: 2px; }
.site-nav a { display: inline-block; color: #fff; text-decoration: none; padding: 6px 10px; border-radius: 8px; font-weight: 600; font-size: 0.92rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { background: rgba(255, 255, 255, 0.12); color: var(--gold); }
.site-nav a.lang { border: 1px solid rgba(255, 255, 255, 0.35); }

/* Page heading */
.hero { background: linear-gradient(160deg, var(--violet-700), var(--violet-900) 55%, var(--night)); color: #fff; padding: 40px 0 44px; }
.hero h1 { font-size: clamp(1.9rem, 1.4rem + 2.4vw, 2.7rem); margin: 0 0 8px; }
.hero p { margin: 0; max-width: 38em; color: #e4def9; font-size: 1.08rem; }
.hero .app-icon { width: 96px; height: 96px; border-radius: 22px; margin-bottom: 16px; box-shadow: 0 0 0 3px var(--gold), 0 10px 24px rgba(0, 0, 0, 0.4); }

/* Documents */
.doc { padding-top: 36px; padding-bottom: 64px; }
.doc > :first-child { margin-top: 0; }
.doc h2 { font-size: 1.35rem; margin: 1.8em 0 0.5em; color: var(--violet-900); }
.doc h3 { font-size: 1.1rem; margin: 1.4em 0 0.4em; color: var(--violet-900); }
.doc ul, .doc ol { padding-left: 1.3em; margin: 0 0 1em; }
.doc li { margin-bottom: 0.35em; }
.doc table { width: 100%; border-collapse: collapse; margin: 0 0 1.2em; font-size: 0.95rem; display: block; overflow-x: auto; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); min-width: 10em; }
.doc th:first-child, .doc td:first-child { min-width: 7em; }
.doc th { background: #ece8f8; }
.updated { color: var(--muted); font-size: 0.95rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; margin: 0 0 20px; }
.card > :last-child { margin-bottom: 0; }
.card h2 { margin-top: 0; }
.email { font-size: 1.2rem; font-weight: 700; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 18px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; color: var(--violet-900); }
.faq details[open] summary { margin-bottom: 8px; }
.faq details > :last-child { margin-bottom: 0; }

/* Footer */
.site-footer { background: var(--night); color: #cfc9e6; padding: 28px 0 36px; font-size: 0.92rem; }
.footer-links { gap: 6px 18px; margin-bottom: 12px; }
.footer-links a { color: #fff; font-weight: 600; }
.footer-links a:hover { color: var(--gold); }
.site-footer p { margin: 0 0 4px; }