/* =========================================
   main.css — AUD Academy LMS
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700;800&display=swap');

/* ── CSS Variables ── */
:root {
  /* ── Brand Blue (메인 포인트) ── */
  --blue:          #2563EB;
  --blue-light:    #3B82F6;
  --blue-dark:     #1D4ED8;
  --blue-pale:     #EFF6FF;

  /* ── Teal (TRINITY) ── */
  --teal:          #0D9488;
  --teal-light:    #14B8A6;
  --teal-pale:     #F0FDFA;

  /* ── Hero 배경 ── */
  --hero-bg:       #06101F;

  /* ── 기존 호환 유지 ── */
  --navy:          #0B1E3D;
  --navy-dark:     #06101F;
  --navy-light:    #1E40AF;
  --gold:          #F59E0B;
  --gold-hover:    #D97706;
  --gray-light:    #e9ecf0;
  --gray-dark:     #2c333d;
  --charcoal:      #1c2129;

  /* ── 배경/카드 ── */
  --bg:            #F8F8F9;
  --bg-card:       #FFFFFF;

  /* ── 텍스트 ── */
  --text-primary:  #333d4b;
  /*--text-primary:  #0F172A;*/
  --text-sub:      #54575a;
  --text-hint:     #86909e;
  --text-gray:     #4e5968;
  
  /* ── 테두리 ── */
  --border:        #E2E8F0;
  --border-gray:   #cbd0d7;
  --border-light:  #F1F5F9;

  /* ── 상태 색상 ── */
  --green:         #22C55E;
  --orange:        #F97316;
  --red:           #EF4444;

  /* ── 반경 ── */
  --radius-sm:     7px;
  --radius-md:     10px;
  --radius-lg:     16px;
  --radius-xl:     20px;

  /* ── 폰트 ── */
  --font:          'Pretendard', 'Noto Sans KR', sans-serif;

  /* ── Alias (하위 호환) ── */
  --color-primary:       #2563EB;
  --color-primary-light: #3B82F6;
  --color-accent:        #F59E0B;
  --color-bg:            #F0F4F8;
  --color-text:          #0F172A;
  --color-text-sub:      #64748B;
  --color-border:        #E2E8F0;
  --font-main:           'Pretendard', 'Noto Sans KR', sans-serif;
}

/* ── Base ── */
body {
  font-family: var(--font);
  font-size: 15px;
  color: var(--text-primary);
  background-color: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout Utilities ── */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--wide {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Section Base ── */
.section {
  padding: 64px 0;
}

.section--sm {
  padding: 48px 0;
}

.section--lg {
  padding: 80px 0;
}

.section__head {
  margin-bottom: 36px;
}

.section__title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  line-height: 1.3;
}

.section__desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ── Typography ── */
.text-primary { color: var(--text-primary); }
.text-sub     { color: var(--text-sub); }
.text-hint    { color: var(--text-hint); }
.text-navy    { color: var(--navy); }
.text-gold    { color: var(--gold); }

.fw-400 { font-weight: 400; }
.fw-500 { font-weight: 500; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }

.fs-12 { font-size: 12px; }
.fs-13 { font-size: 13px; }
.fs-14 { font-size: 14px; }
.fs-15 { font-size: 15px; }
.fs-16 { font-size: 16px; }
.fs-18 { font-size: 18px; }
.fs-20 { font-size: 20px; }
.fs-24 { font-size: 24px; }

/* ── Flex Utilities ── */
.flex        { display: flex; }
.flex-col    { display: flex; flex-direction: column; }
.items-center{ align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-8   { gap: 8px; }
.gap-12  { gap: 12px; }
.gap-16  { gap: 16px; }
.gap-24  { gap: 24px; }

/* ── Grid ── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--border);
  border: none;
}

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-hint);
  /*margin-bottom: 20px;*/
}

.breadcrumb a {
  color: var(--text-hint);
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--navy);
}

.breadcrumb__sep {
  color: var(--border);
  font-size: 11px;
}

.breadcrumb__current {
  color: var(--text-sub);
  font-weight: 500;
}

/* ── Empty State ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
}

.empty-state__icon {
  width: 56px;
  height: 56px;
  background: var(--border);
  border-radius: 50%;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-state__title {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state__desc {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ── Sticky Sidebar ── */
.sticky-card {
  position: sticky;
  top: 80px;
}

/* ── Page Layout ── */
.page-with-sidebar {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

.page-with-sidebar--right {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

/* ── Detail Page Layout ── */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

/* ── Transition Default ── */
* {
  transition-timing-function: ease;
  transition-duration: 0.2s;
}

a, button, input, select, textarea,
[class*="btn"], [class*="card"], [class*="nav"] {
  transition: all 0.2s ease;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: #e9ecef;
}

::-webkit-scrollbar-thumb {
  background: #adb5bd;
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: #868e96;
}

/* ── Responsive ── */
/* 1200px 이상: 풀 레이아웃 — 별도 처리 불필요 */

/* 768px ~ 1199px: 태블릿 */
@media (max-width: 1199px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }

  /* course-list 사이드바는 컴포넌트에서 220px 유지 */
  .page-with-sidebar {
    grid-template-columns: 220px 1fr;
  }

  .detail-layout {
    grid-template-columns: 1fr 280px;
    gap: 28px;
  }
}

/* 767px 이하: 모바일 */
@media (max-width: 767px) {
  .section {
    padding: 48px 0;
  }

  .section__title {
    font-size: 22px;
  }

  .grid-3,
  .grid-4,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 16px;
  }

  /* 모바일에서 사이드바 포함 레이아웃 단열 */
  .page-with-sidebar {
    grid-template-columns: 1fr;
  }

  .detail-layout {
    grid-template-columns: 1fr;
  }

  .section-head-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}