/* ==========================================================================
   NIPAL AI — Blog site chrome (header · footer · 공통 레이아웃)
   홈(index.html) 디자인 문법: 순백 배경 + #f7f6f3 타일 + #e4e4e5 라인 + 점선 구분 + 알약 버튼
   ========================================================================== */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }
:focus-visible { outline: 3px solid rgba(77, 87, 245, 0.32); outline-offset: 2px; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

/* channel.io식 점선 구분 */
.sep-dots {
  position: relative;
}
.sep-dots::before {
  content: "";
  display: block;
  height: 3px;
  background-image: radial-gradient(circle, #e4e4e5 1.5px, transparent 1.6px);
  background-size: 13.1px 3px;
  background-repeat: repeat-x;
  background-position: left center;
}

/* ==========================================================================
   Header — 슬림 톱바 (app.nipal-ai.com 도구 페이지와 동일 문법)
   ========================================================================== */

.site-top {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid #ececed;
}
.st-inner {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
  padding: 14px 0;
  display: flex;
  align-items: center;
  gap: 30px;
}
.brand-logo { height: 24px; width: auto; display: block; }
.st-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-500);
}
.st-nav a { padding: 6px 2px; transition: color 0.15s ease; }
.st-nav a:hover { color: var(--ink-900); }
.st-nav a.is-active { color: var(--ink-900); }
.st-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.st-ghost {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink-700);
  border: 1px solid var(--ink-100);
  border-radius: 999px;
  padding: 9px 17px;
  transition: border-color 0.18s ease, color 0.18s ease;
}
.st-ghost:hover { border-color: #c9c9cc; color: var(--ink-900); }
.st-cta {
  font-size: 13.5px;
  font-weight: 700;
  color: #fff;
  background: var(--ink-900);
  border-radius: 999px;
  padding: 10px 18px;
  transition: background 0.18s ease;
}
.st-cta:hover { background: #2b2d34; }

@media (max-width: 640px) {
  .st-nav { display: none; }
  .st-ghost { display: none; }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  margin-top: 96px;
  padding: 56px 0 44px;
}
.site-footer .footer-grid {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  padding-top: 42px;
}
.footer-brand-blurb {
  max-width: 460px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-500);
  margin: 18px 0 22px;
}
.biz-info { margin: 0; font-size: 12.5px; color: var(--ink-400); line-height: 1.8; }
.biz-info div { display: flex; gap: 8px; }
.biz-info dt { font-weight: 600; color: var(--ink-500); flex: 0 0 auto; }
.biz-info dt::after { content: ":"; }
.biz-info dd { margin: 0; }
.biz-info a { color: inherit; }
.biz-info a:hover { color: var(--ink-700); }
.footer-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-600);
  justify-content: flex-end;
}
.footer-links a:hover { color: var(--ink-900); }
.copyright { font-size: 12.5px; color: var(--ink-400); margin: 20px 0 0; text-align: right; }

@media (max-width: 760px) {
  .site-footer .footer-grid { display: block; }
  .footer-links { justify-content: flex-start; margin-top: 28px; }
  .copyright { text-align: left; }
}