:root {
  --bi-navy: #1B2A4A;
  --bi-navy-light: #2C3E6B;
  --bi-mint: #4ECDC4;
  --bi-mint-light: #A8E6CF;
  --bi-mint-dark: #38B2AC;
  --bi-ivory: #FAFAF5;
  --bi-ivory-warm: #F5F3ED;
  --bi-white: #FFFFFF;
  --bi-gray-50: #F9FAFB;
  --bi-gray-100: #F3F4F6;
  --bi-gray-200: #E5E7EB;
  --bi-gray-300: #D1D5DB;
  --bi-gray-400: #9CA3AF;
  --bi-gray-500: #6B7280;
  --bi-gray-600: #4B5563;
  --bi-gray-700: #374151;
  --bi-gray-800: #1F2937;
  --bi-text: #2D3748;
  --bi-text-light: #5A6577;
  --bi-radius-sm: 6px;
  --bi-radius-md: 12px;
  --bi-radius-lg: 16px;
  --bi-radius-xl: 24px;
  --bi-shadow-sm: 0 1px 3px rgba(27,42,74,0.06);
  --bi-shadow-md: 0 4px 16px rgba(27,42,74,0.08);
  --bi-shadow-lg: 0 8px 32px rgba(27,42,74,0.12);
  --bi-shadow-xl: 0 16px 48px rgba(27,42,74,0.16);
  --bi-transition: 200ms cubic-bezier(0.4,0,0.2,1);
  --bi-max-width: 1200px;
  --bi-content-width: 780px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { 
  font-size: 16px; 
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { 
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--bi-text);
  background: var(--bi-ivory);
  overflow-x: hidden;
}

body.bestinfo-site .wp-site-blocks { padding: 0; max-width: none; }
body.bestinfo-site header.wp-block-template-part { display: none; }
body.bestinfo-site footer.wp-block-template-part { display: none; }
body.bestinfo-site .has-global-padding { padding: 0; }

a { color: var(--bi-navy); text-decoration: none; transition: color var(--bi-transition); }
a:hover { color: var(--bi-mint-dark); }
a:focus-visible { outline: 2px solid var(--bi-mint); outline-offset: 2px; border-radius: 2px; }

img { max-width: 100%; height: auto; display: block; }

/* === HEADER === */
.bi-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bi-gray-200);
  transition: box-shadow var(--bi-transition);
}
.bi-header.scrolled { box-shadow: var(--bi-shadow-md); }
.bi-header-inner {
  max-width: var(--bi-max-width);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 64px;
}
.bi-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; color: var(--bi-navy); }
.bi-logo img { width: 36px; height: 36px; border-radius: 8px; }
.bi-logo span { letter-spacing: -0.02em; }

.bi-nav { display: flex; gap: 4px; align-items: center; }
.bi-nav a {
  padding: 8px 14px; border-radius: var(--bi-radius-sm);
  font-size: 0.9rem; font-weight: 500; color: var(--bi-gray-600);
  transition: all var(--bi-transition);
}
.bi-nav a:hover { color: var(--bi-navy); background: var(--bi-gray-100); }
.bi-nav a.active { color: var(--bi-mint-dark); background: rgba(78,205,196,0.08); }

.bi-menu-toggle { display: none; background: none; border: none; padding: 8px; cursor: pointer; }
.bi-menu-toggle svg { width: 24px; height: 24px; stroke: var(--bi-navy); }

@media (max-width: 768px) {
  .bi-header-inner { padding: 0 16px; height: 56px; }
  .bi-nav { 
    display: none; position: fixed; top: 56px; left: 0; right: 0; bottom: 0;
    flex-direction: column; background: var(--bi-white);
    padding: 16px; gap: 4px; z-index: 999;
    border-top: 1px solid var(--bi-gray-200);
  }
  .bi-nav.open { display: flex; }
  .bi-nav a { padding: 14px 16px; font-size: 1rem; border-radius: var(--bi-radius-md); }
  .bi-menu-toggle { display: block; }
}

/* === ARTICLE STYLES === */
.bi-article-wrap {
  max-width: var(--bi-content-width);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.bi-article-hero {
  position: relative; border-radius: var(--bi-radius-lg); overflow: hidden;
  margin-bottom: 40px; aspect-ratio: 16/9;
}
.bi-article-hero img {
  width: 100%; height: 100%; object-fit: cover;
}
.bi-article-hero::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 40%;
  background: linear-gradient(transparent, rgba(27,42,74,0.3));
}

.bi-article-meta {
  display: flex; gap: 16px; align-items: center; margin-bottom: 16px;
  font-size: 0.85rem; color: var(--bi-gray-500);
}
.bi-article-cat {
  background: rgba(78,205,196,0.1); color: var(--bi-mint-dark);
  padding: 4px 12px; border-radius: 100px; font-weight: 600; font-size: 0.8rem;
}

.bi-article-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 2rem; font-weight: 700; line-height: 1.35;
  color: var(--bi-navy); margin-bottom: 24px; letter-spacing: -0.03em;
}

.bi-article-content {
  font-size: 1.05rem; line-height: 1.8; color: var(--bi-text);
}
.bi-article-content h2 {
  font-family: 'Noto Serif KR', serif;
  font-size: 1.5rem; font-weight: 700; color: var(--bi-navy);
  margin: 56px 0 20px; padding-bottom: 12px;
  border-bottom: 2px solid var(--bi-mint);
  letter-spacing: -0.02em; line-height: 1.4;
}
.bi-article-content h3 {
  font-size: 1.2rem; font-weight: 600; color: var(--bi-navy-light);
  margin: 40px 0 16px; line-height: 1.4;
}
.bi-article-content p { margin-bottom: 20px; word-break: keep-all; }

.bi-article-content ul, .bi-article-content ol {
  margin: 16px 0 24px 24px; line-height: 1.8;
}
.bi-article-content li { margin-bottom: 8px; padding-left: 4px; }
.bi-article-content li::marker { color: var(--bi-mint-dark); }

.bi-article-content blockquote {
  margin: 28px 0; padding: 20px 24px;
  background: linear-gradient(135deg, rgba(78,205,196,0.06), rgba(27,42,74,0.03));
  border-left: 4px solid var(--bi-mint);
  border-radius: 0 var(--bi-radius-md) var(--bi-radius-md) 0;
  font-size: 1rem; color: var(--bi-gray-700);
}
.bi-article-content blockquote p:last-child { margin-bottom: 0; }

.bi-article-content table {
  width: 100%; border-collapse: collapse; margin: 24px 0;
  font-size: 0.95rem; border-radius: var(--bi-radius-md); overflow: hidden;
  border: 1px solid var(--bi-gray-200);
}
.bi-article-content thead th {
  background: var(--bi-navy); color: var(--bi-white);
  padding: 14px 16px; text-align: left; font-weight: 600; font-size: 0.9rem;
}
.bi-article-content tbody td {
  padding: 12px 16px; border-bottom: 1px solid var(--bi-gray-200);
  vertical-align: top;
}
.bi-article-content tbody tr:nth-child(even) { background: var(--bi-gray-50); }
.bi-article-content tbody tr:hover { background: rgba(78,205,196,0.04); }

.bi-article-content .bi-table-wrap {
  overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 24px 0;
}

.bi-article-content img {
  border-radius: var(--bi-radius-md); margin: 32px 0;
  box-shadow: var(--bi-shadow-sm);
}
.bi-article-content figure { margin: 32px 0; }
.bi-article-content figcaption {
  text-align: center; font-size: 0.85rem; color: var(--bi-gray-500); margin-top: 8px;
}

.bi-article-content .bi-callout {
  padding: 20px 24px; margin: 28px 0;
  background: var(--bi-ivory-warm);
  border-radius: var(--bi-radius-md);
  border: 1px solid var(--bi-gray-200);
}
.bi-article-content .bi-callout-title {
  font-weight: 700; color: var(--bi-navy); margin-bottom: 8px; font-size: 0.95rem;
}

.bi-article-content .bi-warning {
  padding: 20px 24px; margin: 28px 0;
  background: #FEF3CD; border-left: 4px solid #F6C23E;
  border-radius: 0 var(--bi-radius-md) var(--bi-radius-md) 0;
}

.bi-article-content .bi-bar-chart { margin: 24px 0; }
.bi-article-content .bi-bar-item {
  display: flex; align-items: center; gap: 12px; margin-bottom: 12px;
}
.bi-article-content .bi-bar-label {
  min-width: 100px; font-size: 0.9rem; font-weight: 500; text-align: right;
}
.bi-article-content .bi-bar-track {
  flex: 1; height: 28px; background: var(--bi-gray-100); border-radius: 100px; overflow: hidden;
}
.bi-article-content .bi-bar-fill {
  height: 100%; border-radius: 100px; display: flex; align-items: center;
  padding: 0 12px; font-size: 0.8rem; font-weight: 600; color: var(--bi-white);
  background: linear-gradient(90deg, var(--bi-navy), var(--bi-mint-dark));
  transition: width 0.8s ease;
}

/* Summary box */
.bi-summary {
  background: var(--bi-white); border: 1px solid var(--bi-gray-200);
  border-radius: var(--bi-radius-lg); padding: 28px 32px; margin-bottom: 40px;
  box-shadow: var(--bi-shadow-sm);
}
.bi-summary-title {
  font-weight: 700; color: var(--bi-navy); margin-bottom: 12px;
  font-size: 1.05rem; display: flex; align-items: center; gap: 8px;
}
.bi-summary-title::before {
  content: ''; width: 4px; height: 20px; background: var(--bi-mint);
  border-radius: 2px; display: inline-block;
}
.bi-summary ul { list-style: none; margin: 0; padding: 0; }
.bi-summary li {
  padding: 6px 0 6px 20px; position: relative; font-size: 0.95rem;
  color: var(--bi-gray-700);
}
.bi-summary li::before {
  content: ''; position: absolute; left: 0; top: 14px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--bi-mint); opacity: 0.7;
}

/* Related posts */
.bi-related { margin-top: 64px; padding-top: 40px; border-top: 1px solid var(--bi-gray-200); }
.bi-related-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 1.3rem; font-weight: 700; color: var(--bi-navy);
  margin-bottom: 24px;
}
.bi-related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.bi-related-card {
  background: var(--bi-white); border-radius: var(--bi-radius-md);
  overflow: hidden; box-shadow: var(--bi-shadow-sm);
  transition: all var(--bi-transition);
  border: 1px solid var(--bi-gray-200);
}
.bi-related-card:hover { transform: translateY(-4px); box-shadow: var(--bi-shadow-md); }
.bi-related-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.bi-related-card-body { padding: 16px; }
.bi-related-card-title {
  font-weight: 600; font-size: 0.95rem; color: var(--bi-navy);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

@media (max-width: 768px) {
  .bi-article-wrap { padding: 24px 16px 60px; }
  .bi-article-title { font-size: 1.5rem; }
  .bi-article-content h2 { font-size: 1.25rem; margin: 40px 0 16px; }
  .bi-article-content h3 { font-size: 1.1rem; }
  .bi-article-content { font-size: 1rem; }
  .bi-related-grid { grid-template-columns: 1fr; }
  .bi-summary { padding: 20px; }
  .bi-article-hero { aspect-ratio: 4/3; }
}

/* === FOOTER === */
.bi-footer {
  background: var(--bi-navy);
  color: rgba(255,255,255,0.7);
  padding: 64px 24px 40px;
}
.bi-footer-inner {
  max-width: var(--bi-max-width); margin: 0 auto;
}
.bi-footer-top {
  display: flex; justify-content: space-between; gap: 48px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1);
}
.bi-footer-brand {
  font-size: 1.1rem; font-weight: 700; color: var(--bi-white);
  margin-bottom: 12px; letter-spacing: -0.02em;
}
.bi-footer-desc { font-size: 0.9rem; line-height: 1.7; max-width: 400px; }
.bi-footer-links { display: flex; gap: 32px; }
.bi-footer-links a {
  color: rgba(255,255,255,0.6); font-size: 0.9rem;
  transition: color var(--bi-transition);
}
.bi-footer-links a:hover { color: var(--bi-mint-light); }
.bi-footer-bottom {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding-top: 32px; font-size: 0.82rem; gap: 16px; flex-wrap: wrap;
}
.bi-footer-legal {
  font-size: 0.8rem; line-height: 1.7; color: rgba(255,255,255,0.45);
  max-width: 700px;
}
.bi-footer-copy { color: rgba(255,255,255,0.4); white-space: nowrap; }

@media (max-width: 768px) {
  .bi-footer { padding: 40px 16px 32px; }
  .bi-footer-top { flex-direction: column; gap: 32px; }
  .bi-footer-links { flex-direction: column; gap: 12px; }
  .bi-footer-bottom { flex-direction: column; }
}

/* === SCROLL ANIMATION === */
.bi-fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.bi-fade-in.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .bi-fade-in { opacity: 1; transform: none; }
}