:root {
  --navy: #0b2545;
  --navy-2: #134074;
  --blue: #3a86ff;
  --ink: #1a1a1a;
  --gray: #5b6470;
  --line: #e6e9ee;
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --accent: #0a8754;
  --radius: 12px;
  --maxw: 1080px;
  --readw: 720px;
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 17px;
  word-break: keep-all;
}
img { max-width: 100%; height: auto; }
a { color: var(--navy-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 12px; top: 12px; background: var(--navy); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: saturate(180%) blur(10px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 20px; color: var(--navy); }
.brand:hover { text-decoration: none; }
.brand-mark { display: inline-grid; place-items: center; width: 30px; height: 30px; background: var(--navy); color: #fff; border-radius: 8px; font-size: 17px; }
.site-nav ul { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; }
.site-nav a { color: var(--gray); font-weight: 600; font-size: 15px; }
.site-nav a:hover, .site-nav a.active { color: var(--navy); text-decoration: none; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--navy); border-radius: 2px; }

/* Hero */
.hero { text-align: center; padding: 64px 0 40px; background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; border-radius: 0 0 24px 24px; margin-bottom: 8px; }
.hero h1 { font-size: 34px; margin: 0 0 12px; letter-spacing: -.02em; }
.hero p { max-width: 600px; margin: 0 auto 24px; color: #cdd7e6; font-size: 17px; }
.hero-cta { display: inline-block; background: #fff; color: var(--navy); font-weight: 700; padding: 12px 26px; border-radius: 999px; }
.hero-cta:hover { text-decoration: none; transform: translateY(-1px); }

/* Sections */
.home-section { margin: 44px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 18px; }
.section-head h2 { font-size: 22px; margin: 0; letter-spacing: -.01em; }
.section-head a { font-size: 14px; font-weight: 600; color: var(--gray); }

/* Card grid */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: box-shadow .15s, transform .15s; }
.card:hover { box-shadow: 0 8px 24px rgba(11,37,69,.08); transform: translateY(-2px); }
.card-link { display: block; padding: 20px; height: 100%; }
.card-link:hover { text-decoration: none; }
.card-cat { display: inline-block; font-size: 12px; font-weight: 700; color: var(--navy-2); background: var(--bg-soft); padding: 3px 10px; border-radius: 999px; margin-bottom: 10px; }
.card-title { font-size: 18px; margin: 0 0 8px; color: var(--ink); line-height: 1.4; }
.card-desc { font-size: 14px; color: var(--gray); margin: 0 0 14px; line-height: 1.6; }
.card-meta { font-size: 12.5px; color: #9aa3af; }

/* Topics */
.topic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.topic { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 22px 10px; border: 1px solid var(--line); border-radius: var(--radius); font-weight: 700; color: var(--navy); background: var(--bg-soft); }
.topic:hover { text-decoration: none; border-color: var(--blue); }
.topic span { font-size: 26px; }

/* Single page static content (about, privacy...) */
.page-body { max-width: var(--readw); margin: 0 auto; padding: 36px 0 40px; }
.page-body h1 { font-size: 28px; margin: 0 0 18px; }
.page-body h2 { font-size: 20px; margin: 30px 0 10px; }
.page-body p { margin: 0 0 16px; color: var(--ink); }
.page-body ul { padding-left: 20px; }
.page-body li { margin-bottom: 8px; }
.breadcrumb { font-size: 13px; color: var(--gray); padding: 20px 0 4px; display: flex; gap: 8px; flex-wrap: wrap; }
.breadcrumb a { color: var(--gray); }

/* Footer */
.site-footer { background: var(--navy); color: #c4cfde; margin-top: 60px; padding: 40px 0 28px; font-size: 14px; }
.footer-top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding-bottom: 24px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-brand strong { color: #fff; font-size: 18px; display: block; margin-bottom: 8px; }
.footer-brand p { margin: 0; max-width: 420px; color: #9fb0c6; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 16px; }
.footer-nav a { color: #c4cfde; font-weight: 600; }
.footer-disclaimer { margin: 20px 0 10px; color: #8a9bb3; font-size: 12.5px; line-height: 1.7; }
.copyright { margin: 0; color: #7888a0; font-size: 12.5px; }

/* Contact form */
#consultForm{background:#f7f9fc;border:1px solid #e6e9ee;border-radius:14px;padding:24px;margin:22px 0;max-width:660px}
#consultForm h3{margin:0 0 4px;color:#0b2545;font-size:19px}
#consultForm .sub{color:#5b6470;font-size:13.5px;margin:0 0 16px}
#consultForm label{display:block;font-weight:700;font-size:13.5px;color:#1a2a44;margin:14px 0 6px}
#consultForm .req{color:#c0392b}
#consultForm input,#consultForm select,#consultForm textarea{width:100%;padding:11px 13px;border:1px solid #d7dde6;border-radius:9px;font-size:15px;font-family:inherit;background:#fff;box-sizing:border-box}
#consultForm textarea{min-height:96px;resize:vertical}
#consultForm .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
#consultForm button{margin-top:20px;width:100%;background:linear-gradient(135deg,#3a86ff,#0b2545);color:#fff;font-weight:800;font-size:16px;padding:14px;border:0;border-radius:10px;cursor:pointer}
#consultForm button:hover{opacity:.93}
#formMsg{max-width:660px;margin:8px 0 10px;font-weight:700;font-size:14px}

/* Responsive */
@media (max-width: 860px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav-toggle { display: flex; }
  .site-nav { position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); max-height: 0; overflow: hidden; transition: max-height .25s ease; }
  .site-nav.open { max-height: 360px; }
  .site-nav ul { flex-direction: column; gap: 0; padding: 8px 20px; }
  .site-nav li { border-bottom: 1px solid var(--line); }
  .site-nav li:last-child { border-bottom: 0; }
  .site-nav a { display: block; padding: 12px 0; }
  .hero { padding: 44px 0 30px; }
  .hero h1 { font-size: 26px; }
  .card-grid { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  #consultForm .row{grid-template-columns:1fr}
}