/* 코어 캠퍼스 — 강의 플랫폼 디자인 시스템 (fastcampus 영감) */
:root {
  --bg: #FAF7F2;
  --fg: #1A1A1A;
  --muted: #6B5C4A;
  --line: #E8DDC9;
  --brand: #1A3558;
  --brand-2: #2C5282;
  --accent: #C99756;
  --soft: #F5EFE0;
  --surface: #FFFDFA;
  --primary: #1A3558;
  --success: #10B981;
  --danger: #EF4444;
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
    "Pretendard", "Malgun Gothic", system-ui, sans-serif;
  --radius-card: 12px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(26, 53, 88, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 53, 88, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 53, 88, 0.12);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-family-sans);
  color: var(--fg); background: var(--bg);
  line-height: 1.6; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); font-size: 14px; }
.muted-count { color: var(--muted); font-size: 14px; font-weight: 500; }

/* === 프로모션 배너 === */
.promo-bar {
  background: linear-gradient(90deg, #1A3558 0%, #2C5282 100%);
  padding: 8px 0;
  font-size: 12.5px;
  color: rgba(255,255,255,0.95);
}
.promo-bar .wrap { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.promo-chip {
  color: white; padding: 4px 12px; border-radius: 999px;
  font-weight: 500; transition: opacity .15s;
}
.promo-chip:hover { text-decoration: none; opacity: 0.85; }
.promo-primary { background: rgba(255,255,255,0.18); }
.promo-secondary { background: var(--accent); color: #fff; }

/* === Sticky Top Nav === */
.site-nav {
  background: rgba(255, 253, 250, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 14px 24px;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 17px; color: var(--brand); }
.brand:hover { text-decoration: none; }
.brand-logo { font-size: 22px; }
.brand-name { letter-spacing: -0.01em; }

/* 카테고리 드롭다운 */
.nav-cat-wrap { position: relative; }
.nav-cat-toggle {
  background: var(--soft); border: 1px solid var(--line);
  padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: 13.5px; font-weight: 600; color: var(--brand);
  cursor: pointer; display: flex; align-items: center; gap: 6px;
  font-family: inherit;
}
.nav-cat-toggle:hover { background: var(--accent); color: white; border-color: var(--accent); }
.cat-icon { font-size: 14px; }
.nav-cat-menu {
  position: absolute; top: calc(100% + 8px); left: 0;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; box-shadow: var(--shadow-lg);
  padding: 8px; min-width: 280px; z-index: 60;
  display: none;
}
.nav-cat-menu.open { display: block; }
.cat-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 6px;
  color: var(--fg); font-size: 14px; font-weight: 500;
}
.cat-item:hover { background: var(--soft); text-decoration: none; }
.cat-emoji { font-size: 18px; }
.cat-name { flex: 1; }
.cat-count { font-size: 11px; color: var(--muted); background: var(--soft); padding: 2px 8px; border-radius: 999px; }

.nav-search { display: flex; }
.nav-search input {
  width: 100%; padding: 9px 14px; font-size: 13.5px;
  background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-family: inherit; color: var(--fg);
}
.nav-search input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.nav-actions { display: flex; gap: 6px; align-items: center; }
.nav-actions a {
  padding: 8px 14px; border-radius: var(--radius-sm);
  color: var(--muted); font-size: 13.5px; font-weight: 600;
}
.nav-actions a:hover { background: var(--soft); color: var(--brand); text-decoration: none; }
.nav-me { display: flex; align-items: center; gap: 6px; background: var(--brand); color: white !important; }
.nav-me:hover { background: var(--brand-2) !important; color: white !important; }
.me-icon { font-size: 13px; }

/* === Hero === */
.hero {
  padding: 72px 0 56px;
  text-align: center;
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}
.hero h1 {
  font-size: 38px; line-height: 1.25; margin: 0 0 14px;
  color: var(--brand); letter-spacing: -0.02em; font-weight: 800;
}
.hero p.lead { color: var(--muted); font-size: 17px; max-width: 640px; margin: 0 auto 24px; }
.badge {
  display: inline-block; padding: 5px 12px; border-radius: 999px;
  background: var(--soft); color: var(--brand-2); font-size: 12px;
  font-weight: 700; margin-bottom: 16px; letter-spacing: 0.02em;
}
.hero-actions { display: flex; gap: 10px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }

/* === CTA Buttons === */
.cta {
  display: inline-block; padding: 11px 22px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 700; cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  text-decoration: none; border: none; font-family: inherit;
}
.cta:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.cta-primary { background: var(--brand); color: white; }
.cta-primary:hover { background: var(--brand-2); color: white; }
.cta-secondary { background: var(--surface); color: var(--brand); border: 1px solid var(--line); }
.cta-secondary:hover { border-color: var(--brand); color: var(--brand); }
.cta-full { display: block; text-align: center; }

/* === 카테고리 섹션 (메인) === */
.section-courses { padding: 56px 0; }
.section-title { font-size: 26px; margin: 0 0 28px; color: var(--brand); font-weight: 800; letter-spacing: -0.01em; }

.cat-block { margin-bottom: 44px; }
.cat-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 2px solid var(--soft); }
.cat-title { font-size: 20px; color: var(--brand); margin: 0; font-weight: 700; }
.cat-emoji-large { font-size: 24px; }
.cat-badge { background: var(--soft); color: var(--brand); font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 999px; }

/* === 코스 카드 그리드 (강의 플랫폼) === */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}
.course-card {
  display: block; color: inherit;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; overflow: hidden;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.course-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent); text-decoration: none; }
.course-card-inner { display: flex; flex-direction: column; }
.course-thumb { aspect-ratio: 16/9; background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%); display: flex; align-items: center; justify-content: center; }
.course-thumb-bg { font-size: 56px; opacity: 0.3; filter: grayscale(0.3); }
.course-body { padding: 18px 20px 22px; }
.course-body h4 { font-size: 16px; color: var(--brand); margin: 0 0 8px; font-weight: 700; line-height: 1.4; }
.course-tag { font-size: 13.5px; color: var(--muted); margin: 0 0 12px; line-height: 1.55; }
.course-meta { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.meta-chip { font-size: 11px; padding: 3px 10px; border-radius: 999px; background: var(--soft); color: var(--brand-2); font-weight: 600; }
.course-cta { font-size: 13px; color: var(--accent); font-weight: 700; }

/* === Course Detail Page === */
.course-hero {
  background: var(--surface); border-bottom: 1px solid var(--line);
  padding: 32px 0 40px;
}
.course-hero-inner {
  display: grid; grid-template-columns: 1fr 320px; gap: 40px;
  align-items: start;
}
.course-breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.course-breadcrumb a { color: var(--muted); }
.course-hero-main h1 { font-size: 32px; line-height: 1.3; color: var(--brand); margin: 8px 0 12px; font-weight: 800; }
.course-hero-main p.lead { font-size: 17px; color: var(--muted); margin-bottom: 18px; }
.course-meta-row { display: flex; gap: 8px; flex-wrap: wrap; }

.course-sidebar { position: sticky; top: 90px; }
.sidebar-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 22px; box-shadow: var(--shadow-md); }
.price-block { padding-bottom: 18px; border-bottom: 1px solid var(--line); margin-bottom: 18px; }
.price-label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.price-value { font-size: 24px; font-weight: 800; color: var(--brand); }
.price-note { font-size: 12px; color: var(--accent); margin-top: 4px; font-weight: 600; }
.sidebar-card .cta { margin-bottom: 8px; }
.sidebar-divider { height: 1px; background: var(--line); margin: 18px 0; }
.sidebar-includes .includes-title { font-size: 13px; font-weight: 700; color: var(--brand); margin-bottom: 10px; }
.sidebar-includes ul { list-style: none; padding: 0; margin: 0; }
.sidebar-includes li { font-size: 13px; padding: 4px 0; color: var(--muted); }

.course-section { padding: 48px 0; }
.course-section-soft { background: var(--surface); }
.course-content { max-width: 800px; }
.course-content h2 { font-size: 24px; color: var(--brand); margin-bottom: 18px; font-weight: 800; }
.course-text h3 { font-size: 18px; color: var(--brand); margin: 24px 0 10px; }
.course-text p { margin: 12px 0; }
.course-text ul, .course-text ol { padding-left: 24px; margin: 12px 0; }
.course-text li { margin: 6px 0; }

/* 차시별 리스트 */
.lesson-list { display: flex; flex-direction: column; gap: 10px; }
.lesson-row {
  display: grid; grid-template-columns: 56px 1fr auto;
  gap: 18px; align-items: center;
  padding: 18px 22px; background: var(--surface);
  border: 1px solid var(--line); border-radius: 12px;
  color: inherit; transition: transform .15s, border-color .15s;
}
.lesson-row:hover { transform: translateX(4px); border-color: var(--accent); text-decoration: none; }
.lesson-no { font-size: 22px; font-weight: 800; color: var(--accent); text-align: center; }
.lesson-body h4 { font-size: 15px; color: var(--brand); margin: 0 0 4px; font-weight: 700; }
.lesson-body p { font-size: 13px; color: var(--muted); margin: 0; }
.lesson-meta { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 12px; }
.lesson-meta .arrow { color: var(--accent); font-size: 18px; font-weight: 700; }

.faq-block { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px 22px; margin-bottom: 12px; }
.faq-block h2, .faq-block h3 { font-size: 16px; color: var(--brand); margin: 8px 0; }
.faq-block p { font-size: 14px; }

.course-cta-bottom {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  color: white; text-align: center; padding: 56px 0;
}
.course-cta-bottom h3 { font-size: 26px; color: white; margin: 0 0 10px; font-weight: 800; }
.course-cta-bottom p { color: rgba(255,255,255,0.9); margin-bottom: 24px; font-size: 15px; }
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.course-cta-bottom .cta-primary { background: white; color: var(--brand); }
.course-cta-bottom .cta-secondary { background: rgba(255,255,255,0.15); color: white; border-color: rgba(255,255,255,0.3); }

/* === Recent Posts === */
.section-recent { padding: 56px 0; background: var(--surface); }
.recent-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.recent-item { display: block; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 18px; color: inherit; transition: border-color .15s; }
.recent-item:hover { border-color: var(--accent); text-decoration: none; }
.recent-kind { font-size: 11px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; }
.recent-item h5 { font-size: 14px; color: var(--brand); margin: 6px 0; line-height: 1.4; font-weight: 700; }

/* === Stats Bar === */
.stats-bar { padding: 32px 0; background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stats-bar .wrap { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; align-items: center; }
.stat-item { font-size: 14px; color: var(--muted); }
.stat-item b { font-size: 22px; color: var(--brand); font-weight: 800; margin-right: 4px; }

/* === Footer === */
.site-footer { background: var(--brand); color: rgba(255,255,255,0.85); padding: 48px 0 28px; margin-top: 56px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand { font-size: 18px; font-weight: 800; color: white; margin-bottom: 6px; }
.footer-tag { font-size: 13px; color: rgba(255,255,255,0.7); }
.footer-col h4 { font-size: 13px; color: white; font-weight: 700; margin-bottom: 12px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { font-size: 13px; padding: 4px 0; color: rgba(255,255,255,0.75); }
.footer-col li a { color: rgba(255,255,255,0.75); }
.footer-col li a:hover { color: white; }
.footer-bottom { padding-top: 18px; font-size: 12px; color: rgba(255,255,255,0.55); text-align: center; }

/* === Responsive === */
@media (max-width: 880px) {
  .nav-inner { grid-template-columns: auto auto 1fr; }
  .nav-search { grid-column: 1 / -1; margin-top: 8px; }
  .course-hero-inner { grid-template-columns: 1fr; }
  .course-sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  .nav-cat-toggle { padding: 7px 10px; font-size: 12px; }
  .nav-actions a { padding: 7px 10px; font-size: 12px; }
  .promo-bar { font-size: 11.5px; }
}

/* === Empty State === */
.empty {
  border: 1px dashed var(--line); padding: 40px;
  text-align: center; color: var(--muted); border-radius: 12px;
  background: var(--surface);
}


/* design_tokens — site_developer Tier 2 (overrides above) */
:root {
  --bg: #FBF8F3;
  --fg: #1C1814;
  --brand: #3D2F1E;
  --accent: #A07840;
  --soft: #EDE5D8;
  --font-family-sans: 'Pretendard', 'Apple SD Gothic Neo', system-ui, sans-serif;
  --radius-card: 4px;
}