/* ============================================
   구멍이 클래스 - 공용 스타일시트
   네비게이션/로그인/카드 등 모든 페이지가 공유하는 스타일
   페이지 고유 스타일은 각 파일의 <style> 태그 안에 둡니다.
   ============================================ */

:root {
  --bg: #f7f8fa; --card: #ffffff; --border: #e5e7eb;
  --ink: #111827; --ink-soft: #6b7280; --ink-faint: #9ca3af;
  --primary: #2563eb; --primary-hover: #1d4ed8; --stat-bg: #f3f4f6;
  --success-bg: #dbeafe; --success-text: #1d4ed8;
  --danger: #dc2626; --danger-bg: #fee2e2;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Pretendard', -apple-system, sans-serif; background: var(--bg); color: var(--ink); }
a { color: inherit; text-decoration: none; }

/* ===== 헤더 / 네비게이션 ===== */
header.site-header {
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 0 24px; display: flex; align-items: center; gap: 24px;
  height: 72px; position: sticky; top: 0; z-index: 50;
}
#auth-area { flex-shrink: 0; margin-left: auto; }
.logo { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.logo-icon { height: 36px; width: auto; display: block; }
.logo-wordmark { height: 29px; width: auto; display: block; }
.main-nav {
  display: flex; align-items: center; gap: 4px; height: 100%; min-width: 0;
  overflow-x: auto; -ms-overflow-style: none; scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }
.nav-item { position: relative; height: 100%; display: flex; align-items: center; flex: 0 0 auto; }
.nav-link {
  display: flex; align-items: center; gap: 4px; height: 100%;
  padding: 0 12px; font-size: 17px; font-weight: 600; color: var(--ink-soft);
  border-bottom: 2px solid transparent; white-space: nowrap;
}
.nav-item.current .nav-link, .nav-link:hover { color: var(--ink); }
.nav-item.current .nav-link { border-bottom-color: var(--primary); }

/* ===== 로그인 상태 (우측 상단) ===== */
.user-menu { position: relative; }
.user-chip {
  display: flex; align-items: center; gap: 8px;
  background: var(--stat-bg); border: none; border-radius: 20px;
  padding: 6px 14px 6px 6px; font-size: 13px; font-weight: 500;
  font-family: inherit; color: var(--ink); cursor: pointer;
}
.user-avatar {
  width: 22px; height: 22px; border-radius: 50%; background: var(--primary);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
}
.login-btn {
  background: var(--primary); color: #fff; border: none; border-radius: 8px;
  padding: 8px 16px; font-size: 13px; font-weight: 600; font-family: inherit; cursor: pointer;
}
.login-btn:hover { background: var(--primary-hover); }
.dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08); min-width: 160px; overflow: hidden;
  display: none; z-index: 30;
}
.dropdown.open { display: block; }
.dropdown-email {
  padding: 12px 14px; font-size: 12px; color: var(--ink-faint);
  border-bottom: 1px solid var(--border); word-break: break-all;
}
.dropdown button, .dropdown a {
  display: block; width: 100%; text-align: left; padding: 11px 14px; background: none; border: none;
  font-size: 14px; font-family: inherit; color: var(--ink); cursor: pointer;
}
.dropdown button:hover, .dropdown a:hover { background: var(--bg); }

/* ===== 로그인 모달 ===== */
.login-panel {
  position: fixed; inset: 0; background: rgba(17,24,39,0.45);
  display: none; align-items: center; justify-content: center; padding: 20px; z-index: 40;
}
.login-panel.open { display: flex; }
.login-card { background: var(--card); border-radius: 14px; padding: 28px; max-width: 360px; width: 100%; }
.login-card h2 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.login-card p { font-size: 13px; color: var(--ink-soft); margin-bottom: 20px; }
.social-btn {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 16px; border-radius: 8px; border: none;
  font-size: 15px; font-weight: 600; font-family: inherit; cursor: pointer; margin-bottom: 10px;
}
.social-btn.kakao { background: #FEE500; color: #111827; }
.social-btn.kakao:hover { background: #f5dc00; }
.social-btn.naver { background: #03C75A; color: #fff; }
.social-btn.naver:hover { background: #02b350; }
.social-btn.google { background: #fff; color: #111827; border: 1px solid var(--border); }
.social-btn.google:hover { background: #f7f8fa; }
.login-card .cancel {
  display: block; width: 100%; text-align: center; margin-top: 12px;
  font-size: 13px; color: var(--ink-soft); background: none; border: none; cursor: pointer; font-family: inherit;
}
.login-msg { font-size: 13px; color: var(--primary); margin-top: 10px; }

/* ===== 공용 레이아웃 ===== */
main { max-width: 960px; margin: 0 auto; padding: 14px 20px 32px; }
.section-title { font-size: 21px; font-weight: 700; margin-bottom: 16px; }

/* ===== 서브탭 (강의/밀착과외/운영대행, 셀러센터 4탭 등) — 알약형, 메인 네비와 구분되는 스타일 ===== */
.subtab-row {
  display: inline-flex; gap: 2px; background: var(--stat-bg); border-radius: 12px;
  padding: 4px; margin-bottom: 28px; overflow-x: auto; max-width: 100%;
}
.subtab {
  padding: 10px 18px; font-size: 15px; font-weight: 600; color: var(--ink-soft);
  border-radius: 9px; white-space: nowrap;
}
.subtab.active { color: var(--ink); background: var(--card); box-shadow: 0 1px 3px rgba(17,24,39,0.08); }
.subtab:hover { color: var(--ink); }

/* ===== 카드 목록 (강의/전자책/마이클래스 공용) ===== */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.course-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; cursor: pointer; transition: box-shadow 0.15s ease;
}
.course-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.course-thumb {
  width: 100%; aspect-ratio: 4/3; background: var(--stat-bg);
  display: flex; align-items: center; justify-content: center; color: var(--ink-faint); font-size: 13px;
}
.course-thumb img { width: 100%; height: 100%; object-fit: contain; }
.course-body { padding: 16px; }
.course-title { font-size: 17px; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.course-desc { font-size: 15px; color: var(--ink-soft); margin-bottom: 10px; line-height: 1.4; }
.course-price { font-size: 18px; font-weight: 700; color: var(--primary); }
.badge {
  display: inline-flex; font-size: 11px; font-weight: 700; color: var(--primary);
  background: var(--stat-bg); padding: 3px 8px; border-radius: 10px;
}

.empty-state, .loading, .empty, .gate { text-align: center; padding: 40px 20px; color: var(--ink-faint); font-size: 14px; }

/* ===== 공용 버튼 ===== */
.btn { border: none; border-radius: 8px; padding: 11px 20px; font-size: 14px; font-weight: 600; font-family: inherit; cursor: pointer; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { background: var(--ink-faint); cursor: not-allowed; }

.page-desc { font-size: 16px; color: var(--ink-soft); margin-bottom: 20px; line-height: 1.6; }

/* ===== 모바일 반응형 ===== */
@media (max-width: 480px) {
  header.site-header {
    display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto;
    height: auto; padding: 10px 14px 8px; row-gap: 6px; gap-column: 0;
  }
  .logo {
    grid-column: 1 / -1; grid-row: 1; justify-content: center;
  }
  .logo-icon { height: 30px; }
  .logo-wordmark { height: 24px; }
  .main-nav { grid-column: 1; grid-row: 2; }
  #auth-area { grid-column: 2; grid-row: 2; margin-left: 0; align-self: center; }
  .nav-link { padding: 0 8px; font-size: 15px; }
  .user-email { display: none; }
  .user-chip { padding: 6px; }
}

/* ===== 사업자 정보 푸터 ===== */
.site-footer {
  border-top: 1px solid var(--border); background: var(--card);
  padding: 28px 20px; margin-top: 40px; text-align: center;
}
.site-footer .footer-inner { max-width: 720px; margin: 0 auto; }
.site-footer p {
  font-size: 12px; color: var(--ink-faint); line-height: 1.9;
}
.site-footer strong { color: var(--ink-faint); font-weight: 600; }
.site-footer .footer-copyright {
  margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border);
  font-size: 11px; color: var(--ink-faint); letter-spacing: 0.02em;
}