:root {
  --navy: #0b1f3a;
  --navy-2: #13304f;
  --green: #1a8f4c;
  --green-d: #147a40;
  --ink: #1c2430;
  --muted: #5b6675;
  --line: #dde3ea;
  --bg: #f5f7fa;
  --card: #ffffff;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

.wrap { width: 100%; max-width: 1000px; margin: 0 auto; padding: 0 16px; }

a { color: #0f5ea8; }
a:hover { color: #0b4780; }

/* Header */
.site-header { background: var(--navy); color: #fff; }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #fff; }
.logo-mark svg { width: 120px; height: 40px; display: block; border-radius: 6px; background: #fff; }
.logo-text strong { display: block; font-size: 17px; letter-spacing: .2px; }
.logo-text small { display: block; font-size: 12px; color: #b9c6d6; }
.header-note { margin: 0; font-size: 13px; color: #b9c6d6; }

/* Nav */
.site-nav { background: var(--navy-2); border-top: 1px solid rgba(255,255,255,.08); }
.site-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 2px;
}
.site-nav a {
  display: block; padding: 10px 12px;
  color: #dbe5f0; text-decoration: none; font-size: 14px; font-weight: 600;
  border-radius: 6px 6px 0 0;
}
.site-nav a:hover { background: rgba(255,255,255,.10); color: #fff; }
.site-nav a.active { background: var(--bg); color: var(--navy); }

/* Layout */
main.wrap { padding-top: 18px; padding-bottom: 28px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.crumbs a { color: var(--muted); }

.page {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px;
}

h1 {
  margin: 0 0 12px;
  font-size: 27px;
  line-height: 1.35;
  color: var(--navy);
}
h2 {
  margin: 28px 0 10px;
  font-size: 20px;
  line-height: 1.4;
  color: var(--navy);
  padding-bottom: 6px;
  border-bottom: 2px solid var(--line);
}
.lead { font-size: 17px; color: #2b3644; margin: 0 0 18px; }
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 6px; }

table { width: 100%; border-collapse: collapse; margin: 0 0 18px; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; vertical-align: top; }
th { background: #eef2f7; color: var(--navy); font-weight: 700; }

/* CTA */
.cta {
  background: #f0f4f9;
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: 8px;
  padding: 18px;
  margin: 0 0 24px;
}
.btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 15px 18px;
  border-radius: 8px;
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  margin-bottom: 10px;
}
.btn-main { background: var(--green); color: #fff; }
.btn-main:hover { background: var(--green-d); color: #fff; }
.btn-apk { background: var(--navy); color: #fff; }
.btn-apk:hover { background: var(--navy-2); color: #fff; }
.cta-note { margin: 6px 0 0; font-size: 13px; color: var(--muted); }

/* Promo box */
.promo-box {
  background: #fff9e8;
  border: 1px solid #e8d9a8;
  border-radius: 8px;
  padding: 16px 18px;
  margin: 22px 0;
}
.promo-box h2 { margin-top: 0; border-bottom: none; padding-bottom: 0; font-size: 18px; }
.code {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 3px 12px;
  border-radius: 5px;
  font-family: Consolas, Menlo, monospace;
}

/* FAQ */
.faq details {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
  background: #fbfcfe;
}
.faq summary { cursor: pointer; font-weight: 700; color: var(--navy); }
.faq details p { margin: 10px 0 0; }

/* Related */
.related {
  margin-top: 22px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 24px;
}
.related h2 { margin-top: 0; font-size: 18px; }
.related ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; }
.related a {
  display: inline-block;
  padding: 7px 13px;
  background: #eef2f7;
  border: 1px solid var(--line);
  border-radius: 20px;
  font-size: 14px;
  text-decoration: none;
  color: var(--navy);
}
.related a:hover { background: #e2e9f2; }

/* Footer */
.site-footer {
  background: var(--navy);
  color: #c4d0de;
  padding: 26px 0;
  font-size: 14px;
  margin-top: 20px;
}
.site-footer p { margin: 0 0 10px; }
.site-footer strong { color: #fff; }
.foot-nav { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 14px 0; }
.foot-nav a { color: #9fd3b4; text-decoration: none; font-size: 13px; }
.foot-nav a:hover { color: #fff; }
.copy { font-size: 12px; color: #8b9bad; margin: 0; }

@media (max-width: 640px) {
  h1 { font-size: 22px; }
  h2 { font-size: 18px; }
  .page { padding: 16px; }
  .related { padding: 16px; }
  .header-note { display: none; }
  .logo-mark svg { width: 96px; height: 32px; }
  body { font-size: 15px; }
}