/*
 * Premium editorial layer
 * 기존 테마를 보존하면서 BEYOND FLAT 보고서의 핵심 원칙을 적용한다.
 */
:root {
  --bg-primary: #f3f0e7;
  --bg-secondary: #e9e5da;
  --text-primary: #11110f;
  --text-muted: #64625b;
  --accent: #1746d1;
  --accent-hover: #0d37b3;
  --signal: #d9ff4f;
  --warm: #ff6846;
  --border: rgba(17,17,15,.2);
  --radius-lg: 2px;
  --radius-md: 2px;
  --shadow-soft: 0 10px 32px rgba(17,17,15,.06);
  --shadow-hover: 0 20px 52px rgba(17,17,15,.13);
  --ease-enter: cubic-bezier(.16,1,.3,1);
  --ease-hover: cubic-bezier(.2,.8,.2,1);
  --display: "Arial Black", "Pretendard", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --body: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}

html {
  max-width: 100%;
  overflow-x: clip;
  background: var(--bg-primary);
}
body {
  font-family: var(--body);
  background:
    linear-gradient(rgba(17,17,15,.028) 1px, transparent 1px) 0 0/100% 40px,
    var(--bg-primary);
  max-width: 100%;
  overflow-x: clip;
}

.skip-link {
  position: fixed;
  z-index: 999;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--text-primary);
  color: var(--signal);
  transform: translateY(-150%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: none; }

.site-header {
  z-index: 100;
  background: color-mix(in srgb, var(--bg-primary) 91%, transparent);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  border-color: var(--border);
}
.site-header .nav-wrap {
  max-width: 1440px;
  min-height: 72px;
  padding: 10px clamp(18px, 3vw, 48px);
  flex-wrap: nowrap;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
  color: var(--text-primary);
  font-family: var(--display);
  font-size: .97rem;
  letter-spacing: -.035em;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: var(--text-primary);
  background: var(--signal);
  border: 1px solid var(--text-primary);
  border-radius: 50%;
  font: 900 13px/1 var(--display);
  transition: transform .45s var(--ease-enter), border-radius .25s ease;
}
.brand:hover .brand-mark { transform: rotate(12deg); border-radius: 4px; }
.site-nav { min-width: 0; overflow-x: auto; scrollbar-width: none; }
.site-nav::-webkit-scrollbar { display: none; }
.site-nav-list { flex-wrap: nowrap; gap: 2px; white-space: nowrap; }
.site-nav-list a {
  min-height: 38px;
  padding: 0 13px;
  border-radius: 0;
  color: #4d4b45;
  font-size: .82rem;
  font-weight: 700;
  transition: color .2s ease, background .2s ease;
}
.site-nav-list a:hover { background: var(--signal); color: var(--text-primary); }
.site-nav-list .current-menu-item a,
.site-nav-list .current_page_item a {
  color: var(--bg-primary);
  background: var(--text-primary);
  box-shadow: none;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 54px;
  padding: 14px 20px;
  border: 1px solid var(--text-primary);
  border-radius: 0;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: .9rem;
  font-weight: 800;
  transition: transform .25s var(--ease-hover), background .2s ease, color .2s ease;
}
.btn-cta:hover {
  background: var(--signal);
  color: var(--text-primary);
  text-decoration: none;
  transform: translateY(-3px);
}

.container { max-width: 900px; }
article.post {
  max-width: 780px;
  padding-top: 70px;
}
article.post h1,
.section h2,
.he-section__title { font-family: var(--display); letter-spacing: -.045em; }
article.post h1 { font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.08; text-wrap: balance; }
article.post h2 { font-size: clamp(1.45rem, 3vw, 2rem); line-height: 1.2; border-color: var(--text-primary); }
article.post p { word-break: keep-all; }
article.post .byline a {
  color: inherit;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 3px;
  text-underline-offset: 3px;
}
article.post nav.toc,
article.post .callout,
article.post .sources-box,
article.post .disclaimer-box,
article.post .faq-item,
article.post .glossary-item { border-radius: 0; }

.grid .card,
.related-posts-grid li {
  border-radius: 0;
  box-shadow: none;
  transition: transform .3s var(--ease-hover), box-shadow .3s ease;
}
.grid .card:hover,
.related-posts-grid li:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }

.topic-continuation {
  margin-top: clamp(48px, 7vw, 76px);
  padding-top: 22px;
  border-top: 1px solid var(--text-primary);
}
.topic-continuation__label {
  margin: 0 0 14px;
  color: var(--text-primary);
  font-family: var(--display);
  font-size: .82rem;
  font-weight: 900;
  letter-spacing: .04em;
}
.topic-continuation__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.topic-continuation__item {
  display: flex;
  min-width: 0;
  min-height: 142px;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  padding: 22px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
}
.topic-continuation__item:only-child {
  grid-column: 1 / -1;
}
.topic-continuation__item span {
  color: var(--text-muted);
  font-size: .76rem;
  font-weight: 800;
}
.topic-continuation__item strong {
  font-family: var(--display);
  font-size: 1.05rem;
  line-height: 1.35;
}
.topic-continuation__item:hover {
  background: var(--signal);
  color: var(--text-primary);
}

@media (max-width: 620px) {
  .topic-continuation__grid { grid-template-columns: 1fr; }
  .topic-continuation__item { min-height: 118px; }
}

.site-footer {
  margin-top: 0;
  background:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,.06) 1px, transparent 0) 0 0/20px 20px,
    #11110f;
}
.site-footer::before { height: 7px; background: var(--signal); opacity: 1; }
.footer-inner { max-width: 1320px; padding-top: 86px; }
.footer-grid { grid-template-columns: 1.6fr .8fr .8fr; }
.footer-logo-mark { color: #11110f; background: var(--signal); border-radius: 50%; }
.footer-col h4::before { background: var(--signal); }
.footer-top-link:hover { border-color: var(--signal); color: var(--signal); background: transparent; }

@media (max-width: 840px) {
  .site-header .nav-wrap { align-items: flex-start; flex-direction: column; gap: 4px; padding-block: 9px 7px; }
  .site-nav {
    width: calc(100vw - 36px);
    overscroll-behavior-inline: contain;
    -webkit-mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 28px), transparent 100%);
    mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 28px), transparent 100%);
  }
  .site-nav-list { padding-right: 34px; scroll-snap-type: inline proximity; }
  .site-nav-list > li { scroll-snap-align: start; }
  .site-nav-list a { min-height: 34px; padding-inline: 11px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 520px) {
  .site-header .nav-wrap { min-height: auto; }
  .brand-mark { width: 30px; height: 30px; }
  .brand { font-size: .9rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}