/* base */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
  line-height: 1.6;
  background: #fafafa;
  color: #111;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 64px;
}

/* sticky header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 250, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.header-inner {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-weight: 750;
  letter-spacing: -0.2px;
}

.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.nav-link {
  padding: 6px 10px;
  border-radius: 10px;
}
.nav-link:hover {
  background: rgba(0,0,0,0.05);
  text-decoration: none;
}
.nav-link.is-active {
  background: rgba(0,0,0,0.08);
}

/* content */
.hero { padding: 16px 0 8px; }

.card {
  background: #fff;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 16px;
  padding: 18px;
  margin-top: 16px;
}

.page-list {
  margin: 10px 0 0;
  padding-left: 18px;
}
.page-list li { margin: 6px 0; }

/* footer */
.site-footer {
  border-top: 1px solid rgba(0,0,0,0.08);
  padding: 24px 0;
}

/* optional: scroll shadow */
.site-header.is-scrolled {
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}