:root {
  --ltc-primary: #1a5276;
  --ltc-primary-dark: #0e3a54;
  --ltc-accent: #2e86c1;
  --ltc-accent-light: #5dade2;
  --ltc-warm: #d4a373;
  --ltc-bg: #fafbfc;
  --ltc-card: #ffffff;
  --ltc-text: #1e293b;
  --ltc-text-muted: #64748b;
  --ltc-border: #e2e8f0;
  --ltc-success: #059669;
  --ltc-radius: 12px;
  --ltc-radius-sm: 8px;
  --ltc-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --ltc-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --ltc-shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
  --ltc-max-w: 800px;
  --ltc-content-max: 1200px;
  --ltc-space-xs: 4px;
  --ltc-space-sm: 8px;
  --ltc-space-md: 16px;
  --ltc-space-lg: 24px;
  --ltc-space-xl: 32px;
  --ltc-space-2xl: 48px;
  --ltc-space-3xl: 64px;
  --ltc-space-4xl: 96px;
  --ltc-transition: 200ms ease;
}

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

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ltc-text);
  background: var(--ltc-bg);
  line-height: 1.75;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ltc-accent); text-decoration: none; transition: color var(--ltc-transition); }
a:hover { color: var(--ltc-primary-dark); }

/* === Header === */
.ltc-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ltc-border);
  transition: box-shadow var(--ltc-transition);
}
.ltc-header.scrolled { box-shadow: var(--ltc-shadow-md); }
.ltc-header-inner {
  max-width: var(--ltc-content-max);
  margin: 0 auto;
  padding: 0 var(--ltc-space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.ltc-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.ltc-logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--ltc-primary), var(--ltc-accent));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.ltc-logo-icon svg { width: 24px; height: 24px; fill: #fff; }
.ltc-logo-text {
  font-size: 1.05rem; font-weight: 700; color: var(--ltc-primary-dark);
  letter-spacing: -0.02em;
}
.ltc-logo-text span { color: var(--ltc-accent); }

.ltc-nav { display: flex; align-items: center; gap: 4px; }
.ltc-nav a {
  padding: 8px 14px; font-size: 0.9rem; font-weight: 500;
  color: var(--ltc-text-muted); border-radius: var(--ltc-radius-sm);
  transition: all var(--ltc-transition);
}
.ltc-nav a:hover { color: var(--ltc-primary); background: rgba(26,82,118,0.06); }

.ltc-mobile-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; align-items: center; justify-content: center;
}
.ltc-mobile-toggle svg { width: 24px; height: 24px; stroke: var(--ltc-text); }

@media (max-width: 768px) {
  .ltc-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px; border-bottom: 1px solid var(--ltc-border); box-shadow: var(--ltc-shadow-lg); }
  .ltc-nav.open { display: flex; }
  .ltc-nav a { padding: 12px 16px; width: 100%; }
  .ltc-mobile-toggle { display: flex; }
}

/* === Typography === */
h1, h2, h3, h4 { font-family: 'Noto Sans KR', sans-serif; color: var(--ltc-primary-dark); line-height: 1.35; letter-spacing: -0.02em; }
h1 { font-size: 2.2rem; font-weight: 800; }
h2 { font-size: 1.6rem; font-weight: 700; margin-top: 2.5em; margin-bottom: 0.8em; padding-bottom: 0.5em; border-bottom: 2px solid var(--ltc-border); }
h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.8em; margin-bottom: 0.6em; }
p { margin-bottom: 1.2em; line-height: 1.8; }

/* === Article Content === */
.ltc-article {
  max-width: var(--ltc-max-w);
  margin: 0 auto;
  padding: var(--ltc-space-3xl) var(--ltc-space-lg);
}
.ltc-article-hero {
  width: 100%; aspect-ratio: 16/9; object-fit: cover;
  border-radius: var(--ltc-radius); margin-bottom: var(--ltc-space-2xl);
}
.ltc-article h1 { margin-bottom: var(--ltc-space-lg); }
.ltc-article-meta {
  display: flex; gap: 16px; color: var(--ltc-text-muted);
  font-size: 0.875rem; margin-bottom: var(--ltc-space-2xl);
  padding-bottom: var(--ltc-space-md);
  border-bottom: 1px solid var(--ltc-border);
}

.ltc-article h2::before {
  content: ''; display: inline-block; width: 4px; height: 1.1em;
  background: var(--ltc-accent); border-radius: 2px;
  margin-right: 10px; vertical-align: middle;
}

/* Content Elements */
.ltc-article table {
  width: 100%; border-collapse: collapse; margin: 1.5em 0;
  font-size: 0.92rem; border-radius: var(--ltc-radius-sm); overflow: hidden;
  box-shadow: var(--ltc-shadow);
}
.ltc-article table thead th {
  background: var(--ltc-primary); color: #fff;
  padding: 12px 16px; text-align: left; font-weight: 600;
  font-size: 0.85rem; letter-spacing: 0.02em;
}
.ltc-article table tbody td {
  padding: 11px 16px; border-bottom: 1px solid var(--ltc-border);
  vertical-align: top;
}
.ltc-article table tbody tr:nth-child(even) { background: #f8fafc; }
.ltc-article table tbody tr:hover { background: #eef6fc; }
@media (max-width: 640px) {
  .ltc-article table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

.ltc-article ul, .ltc-article ol {
  margin: 1em 0 1.5em 1.5em; line-height: 1.9;
}
.ltc-article li { margin-bottom: 0.4em; }
.ltc-article li::marker { color: var(--ltc-accent); }

.ltc-article blockquote {
  border-left: 4px solid var(--ltc-accent);
  background: linear-gradient(135deg, #f0f9ff, #f8fafc);
  padding: 20px 24px; margin: 1.5em 0;
  border-radius: 0 var(--ltc-radius-sm) var(--ltc-radius-sm) 0;
  font-size: 0.95rem; color: var(--ltc-primary-dark);
}

.ltc-article .content-img {
  width: 100%; border-radius: var(--ltc-radius);
  margin: 2em 0; box-shadow: var(--ltc-shadow-md);
}

/* Callout box */
.ltc-callout {
  background: linear-gradient(135deg, #fef9ef, #fff8f0);
  border: 1px solid #fcd9a0;
  border-left: 4px solid var(--ltc-warm);
  padding: 20px 24px;
  border-radius: 0 var(--ltc-radius-sm) var(--ltc-radius-sm) 0;
  margin: 1.5em 0;
  font-size: 0.93rem;
  line-height: 1.75;
}

/* Bar chart inline */
.ltc-bar-chart { margin: 1.5em 0; }
.ltc-bar-item { display: flex; align-items: center; margin-bottom: 8px; font-size: 0.88rem; }
.ltc-bar-label { width: 120px; flex-shrink: 0; color: var(--ltc-text-muted); font-weight: 500; }
.ltc-bar-track { flex: 1; height: 28px; background: #f1f5f9; border-radius: 6px; overflow: hidden; position: relative; }
.ltc-bar-fill { height: 100%; border-radius: 6px; background: linear-gradient(90deg, var(--ltc-accent), var(--ltc-accent-light)); display: flex; align-items: center; justify-content: flex-end; padding-right: 10px; color: #fff; font-size: 0.8rem; font-weight: 600; transition: width 0.6s ease; }

/* Step diagram */
.ltc-steps { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.5em 0; }
.ltc-step {
  flex: 1; min-width: 140px; padding: 16px;
  background: var(--ltc-card); border: 1px solid var(--ltc-border);
  border-radius: var(--ltc-radius-sm); text-align: center;
  position: relative;
}
.ltc-step-num {
  display: inline-flex; width: 28px; height: 28px;
  background: var(--ltc-accent); color: #fff;
  border-radius: 50%; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700; margin-bottom: 8px;
}
.ltc-step-title { font-size: 0.85rem; font-weight: 600; color: var(--ltc-primary-dark); }

/* Summary box */
.ltc-summary {
  background: linear-gradient(135deg, #f0f9ff, #e8f4fd);
  border: 1px solid #bde0fe;
  border-radius: var(--ltc-radius);
  padding: 24px 28px;
  margin-bottom: var(--ltc-space-2xl);
  font-size: 0.93rem;
  line-height: 1.8;
}
.ltc-summary strong { color: var(--ltc-primary-dark); }

/* Related posts */
.ltc-related {
  margin-top: var(--ltc-space-4xl);
  padding-top: var(--ltc-space-2xl);
  border-top: 2px solid var(--ltc-border);
}
.ltc-related h3 { font-size: 1.2rem; margin-bottom: var(--ltc-space-lg); }
.ltc-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.ltc-related-card {
  border-radius: var(--ltc-radius);
  overflow: hidden;
  background: var(--ltc-card);
  box-shadow: var(--ltc-shadow);
  transition: transform var(--ltc-transition), box-shadow var(--ltc-transition);
}
.ltc-related-card:hover { transform: translateY(-4px); box-shadow: var(--ltc-shadow-lg); }
.ltc-related-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.ltc-related-card .card-body { padding: 16px; }
.ltc-related-card .card-title { font-size: 0.95rem; font-weight: 600; color: var(--ltc-primary-dark); line-height: 1.4; }

/* === Cards (Home) === */
.ltc-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.ltc-card {
  background: var(--ltc-card);
  border-radius: var(--ltc-radius);
  overflow: hidden;
  box-shadow: var(--ltc-shadow);
  transition: transform var(--ltc-transition), box-shadow var(--ltc-transition);
}
.ltc-card:hover { transform: translateY(-4px); box-shadow: var(--ltc-shadow-lg); }
.ltc-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.ltc-card-body { padding: 20px 24px; }
.ltc-card-cat { font-size: 0.75rem; font-weight: 600; color: var(--ltc-accent); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 6px; }
.ltc-card-title { font-size: 1.05rem; font-weight: 700; color: var(--ltc-primary-dark); line-height: 1.4; margin-bottom: 8px; }
.ltc-card-excerpt { font-size: 0.88rem; color: var(--ltc-text-muted); line-height: 1.6; }

/* === Footer === */
.ltc-footer {
  background: var(--ltc-primary-dark);
  color: rgba(255,255,255,0.75);
  padding: var(--ltc-space-3xl) var(--ltc-space-lg) var(--ltc-space-2xl);
  margin-top: var(--ltc-space-4xl);
}
.ltc-footer-inner {
  max-width: var(--ltc-content-max);
  margin: 0 auto;
}
.ltc-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: var(--ltc-space-2xl);
}
@media (max-width: 768px) { .ltc-footer-grid { grid-template-columns: 1fr; gap: 32px; } }
.ltc-footer-brand { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.ltc-footer-desc { font-size: 0.85rem; line-height: 1.7; }
.ltc-footer-heading { font-size: 0.85rem; font-weight: 600; color: #fff; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.ltc-footer-links { list-style: none; }
.ltc-footer-links li { margin-bottom: 8px; }
.ltc-footer-links a { color: rgba(255,255,255,0.65); font-size: 0.85rem; transition: color var(--ltc-transition); }
.ltc-footer-links a:hover { color: #fff; }
.ltc-footer-legal {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: var(--ltc-space-lg);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.8;
}
.ltc-footer-legal p { margin-bottom: 6px; }

/* === Notices === */
.ai-notice { font-size: 0.85em; color: #888; margin-top: 2em; }
.legal-notice {
  font-size: 0.85em; color: #777; background: #f8f9fa;
  border-left: 3px solid #cbd5e1;
  padding: 10px 14px; margin-top: 2em;
  border-radius: 0 6px 6px 0;
}
.legal-notice p { margin: 4px 0; }

/* === WP Overrides === */
.wp-site-blocks, .wp-block-group { all: unset; }
body .is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)) { max-width: none; }
.wp-block-post-content { max-width: none; padding: 0; }

/* Single post template overrides */
body.single .wp-site-blocks > header,
body.single .wp-site-blocks > footer,
body.page .wp-site-blocks > header,
body.page .wp-site-blocks > footer { display: none; }

/* TOC */
.ltc-toc {
  background: #f8fafc;
  border: 1px solid var(--ltc-border);
  border-radius: var(--ltc-radius);
  padding: 24px 28px;
  margin-bottom: var(--ltc-space-2xl);
}
.ltc-toc-title { font-size: 0.9rem; font-weight: 700; color: var(--ltc-primary-dark); margin-bottom: 12px; }
.ltc-toc ol { list-style: decimal; padding-left: 1.2em; }
.ltc-toc li { margin-bottom: 6px; font-size: 0.9rem; }
.ltc-toc a { color: var(--ltc-text-muted); }
.ltc-toc a:hover { color: var(--ltc-accent); }

/* FAQ */
.ltc-faq { margin: 2em 0; }
.ltc-faq-item { border: 1px solid var(--ltc-border); border-radius: var(--ltc-radius-sm); margin-bottom: 10px; overflow: hidden; }
.ltc-faq-q {
  padding: 16px 20px; font-weight: 600; font-size: 0.95rem;
  background: #f8fafc; cursor: pointer; display: flex;
  justify-content: space-between; align-items: center;
}
.ltc-faq-q::after { content: '+'; font-size: 1.2rem; color: var(--ltc-accent); font-weight: 300; }
.ltc-faq-a { padding: 0 20px 16px; font-size: 0.9rem; line-height: 1.8; display: none; }
.ltc-faq-item.open .ltc-faq-a { display: block; }
.ltc-faq-item.open .ltc-faq-q::after { content: '\2212'; }

/* Gauge */
.ltc-gauge { display: inline-flex; flex-direction: column; align-items: center; margin: 0 12px; }
.ltc-gauge-circle {
  width: 80px; height: 80px; border-radius: 50%;
  background: conic-gradient(var(--ltc-accent) var(--pct, 0%), #e2e8f0 0);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.ltc-gauge-inner {
  width: 60px; height: 60px; border-radius: 50%;
  background: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 700; color: var(--ltc-primary-dark);
}
.ltc-gauge-label { font-size: 0.75rem; color: var(--ltc-text-muted); margin-top: 6px; text-align: center; }

/* Responsive refinements */
@media (max-width: 640px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
  .ltc-article { padding: var(--ltc-space-xl) var(--ltc-space-md); }
  .ltc-steps { flex-direction: column; }
  .ltc-bar-label { width: 80px; font-size: 0.8rem; }
}