:root {
    --font-sans: "Pretendard Variable", "Pretendard", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --brand: #2A62B8;
    --brand-hover: #1E4A8A;
    --text-main: #1B1D1F;
    --surface: #FAFAFA;
  }
  body { font-family: var(--font-sans); color: var(--text-main); background: var(--surface); margin: 0; padding: 0; line-height: 1.5; letter-spacing: 0; }
  input, select, textarea, button { font-family: var(--font-sans); letter-spacing: 0; }
  /* ===== 삐딱 스타일 레이아웃: 다크 사이드바 + 라이트 메인 ===== */
  .admin-shell { display: flex; min-height: 100vh; align-items: stretch; }
  .admin-side { width: 234px; flex-shrink: 0; background: #0f172a; color: #cbd5e1; display: flex; flex-direction: column; padding: 20px 14px; position: sticky; top: 0; height: 100vh; }
  .admin-side__brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 18px; font-size: 15px; font-weight: 800; color: #fff; border-bottom: 1px solid rgba(255,255,255,0.07); margin-bottom: 14px; }
  .admin-side__brand b { color: #60a5fa; }
  .admin-side__logo { font-size: 20px; }
  .admin-side__nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
  .admin-side__nav .admin-tab { display: flex; align-items: center; gap: 11px; width: 100%; text-align: left; padding: 11px 13px; border-radius: 10px; background: transparent; color: #cbd5e1; font-size: 14px; font-weight: 700; cursor: pointer; border: 0; transition: background .12s, color .12s; }
  .admin-side__nav .admin-tab:hover { background: #1e293b; color: #fff; }
  .admin-side__nav .admin-tab.active { background: var(--brand); color: #fff; box-shadow: 0 6px 16px rgba(42,98,184,0.35); }
  .admin-side__ico { font-size: 16px; width: 20px; text-align: center; flex-shrink: 0; }
  .admin-side__badge { margin-left: auto; background: #ef4444; color: #fff; border-radius: 999px; padding: 1px 7px; font-size: 10px; font-weight: 800; }
  .admin-side__foot { border-top: 1px solid rgba(255,255,255,0.07); padding-top: 12px; margin-top: 12px; display: flex; flex-direction: column; gap: 2px; }
  .admin-side__link { display: flex; align-items: center; gap: 11px; padding: 9px 13px; border-radius: 10px; color: #94a3b8; font-size: 13px; font-weight: 600; background: transparent; border: 0; cursor: pointer; text-align: left; text-decoration: none; transition: background .12s, color .12s; }
  .admin-side__link:hover { background: #1e293b; color: #fff; }
  .admin-side__email { padding: 8px 13px 0; font-size: 11px; color: #64748b; word-break: break-all; }
  .admin-main { flex: 1; min-width: 0; background: #f8fafc; padding: 26px 30px 64px; }
  .admin-main__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
  .admin-main__title { margin: 0; font-size: 24px; font-weight: 800; color: #0f172a; letter-spacing: -0.01em; }
  .admin-main__sub { margin: 5px 0 0; font-size: 13px; color: #64748b; }
  .admin-panel[hidden] { display: none !important; }
  .card { background: #fff; border: 1px solid #e8eef5; border-radius: 14px; padding: 22px 24px; margin-bottom: 18px; box-shadow: 0 1px 3px rgba(15,23,42,0.04); }
  h2 { margin: 0 0 14px; font-size: 18px; font-weight: 800; }
  h3 { margin: 22px 0 12px; font-size: 16px; font-weight: 700; color: #1e293b; }
  .stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin: 14px 0; }
  .stat { padding: 16px 18px; border-radius: 12px; border: 1px solid #e8eef5; background: linear-gradient(180deg,#ffffff,#f8fafc); }
  .stat .lab { font-size: 11px; font-weight: 800; color: #64748b; }
  .stat .val { font-size: 26px; font-weight: 900; color: #0f172a; margin: 6px 0 2px; letter-spacing: -0.02em; }
  .stat .sub { font-size: 11px; color: #94a3b8; }
  .filter { padding: 6px 14px; border-radius: 999px; border: 1px solid #d1d5db; background: #fff; cursor: pointer; font-size: 12px; color: #475569; font-weight: 600; margin-right: 4px; }
  .filter.active { background: #1B1D1F; color: #fff; border-color: #1B1D1F; }
  .iq-row { border: 1px solid #e2e8f0; border-radius: 10px; padding: 14px; margin-bottom: 10px; background: #fff; }
  .iq-row .head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; flex-wrap: wrap; gap: 6px; }
  .iq-row .body { font-size: 13px; color: #475569; margin: 6px 0; }
  .iq-row .actions { display: flex; gap: 6px; margin-top: 8px; }
  .refund-admin-card { margin: 10px 0; padding: 12px; border: 1px solid #fdba74; border-radius: 10px; background: #fff7ed; color: #9a3412; }
  .refund-admin-card > b { display: block; margin-bottom: 8px; font-size: 13px; }
  .refund-admin-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin-bottom: 10px; }
  .refund-admin-grid > div { padding: 10px; border: 1px solid #fed7aa; border-radius: 8px; background: #fff; font-size: 12px; color: #9a3412; }
  .refund-admin-grid strong { color: #7c2d12; font-size: 15px; }
  .refund-admin-card label { display: block; font-size: 12px; font-weight: 700; margin-bottom: 4px; }
  .refund-admin-card input { width: 100%; box-sizing: border-box; padding: 9px 10px; border: 1px solid #fdba74; border-radius: 8px; background: #fff; color: #1B1D1F; }
  .btn { padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 12px; font-weight: 700; border: 0; }
  .btn-pri { background: var(--brand); color: #fff; }
  .btn-pri:hover { background: var(--brand-hover); }
  .btn-sec { background: #fff; color: #64748b; border: 1px solid #d1d5db; }
  .badge-open { font-size: 10px; padding: 2px 8px; background: #dcfce7; color: #15803d; border-radius: 999px; font-weight: 700; }
  .badge-closed { font-size: 10px; padding: 2px 8px; background: #f1f5f9; color: #64748b; border-radius: 999px; font-weight: 700; }
  .admin-plan-form { display: grid; grid-template-columns: minmax(180px, 1.3fr) 130px 110px 150px auto; gap: 10px; align-items: end; }
  .admin-plan-form label { display: flex; flex-direction: column; gap: 4px; font-size: 11px; font-weight: 800; color: #64748b; }
  .admin-plan-form input, .admin-plan-form select { width: 100%; padding: 8px 10px; border: 1px solid #cbd5e1; border-radius: 8px; font-size: 13px; box-sizing: border-box; }
  .admin-plan-status { min-height: 18px; margin-top: 8px; font-size: 12px; color: #64748b; }
  .admin-user-toolbar { display: grid; grid-template-columns: minmax(260px, 1fr) 140px 140px auto; gap: 10px; align-items: end; margin-bottom: 16px; }
  .admin-user-toolbar label { display: flex; flex-direction: column; gap: 4px; font-size: 11px; font-weight: 800; color: #64748b; }
  .admin-user-toolbar input, .admin-user-toolbar select { width: 100%; padding: 9px 11px; border: 1px solid #cbd5e1; border-radius: 8px; font-size: 13px; box-sizing: border-box; background: #fff; }
  .admin-users-box { display: grid; gap: 10px; }
  .admin-users-pager { display: flex; justify-content: center; align-items: center; gap: 10px; margin-top: 14px; color: #64748b; font-size: 13px; }
  .admin-users-pager:empty { display: none; }
  .admin-users-pager .btn:disabled { opacity: 0.45; cursor: not-allowed; }
  .admin-user-row { border: 1px solid #e2e8f0; border-radius: 12px; padding: 14px; background: #fff; }
  .admin-user-row.blocked { border-color: #fecaca; background: #fffafa; }
  .admin-user-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
  .admin-user-name { font-size: 15px; font-weight: 900; color: #1B1D1F; }
  .admin-user-meta { font-size: 12px; color: #64748b; margin-top: 2px; }
  .admin-user-badges { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
  .admin-badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 8px; border-radius: 999px; font-size: 10px; font-weight: 900; background: #f1f5f9; color: #475569; }
  .admin-badge.plan { background: #E8F0FB; color: #1E4A8A; }
  .admin-badge.paid { background: #dcfce7; color: #15803d; }
  .admin-badge.blocked { background: #fee2e2; color: #b91c1c; }
  .admin-user-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin-bottom: 10px; }
  .admin-user-cell { padding: 9px 10px; border-radius: 9px; background: #FAFAFA; border: 1px solid #eef2f7; }
  .admin-user-cell span { display: block; font-size: 10px; font-weight: 800; color: #94a3b8; margin-bottom: 2px; }
  .admin-user-cell b { font-size: 13px; color: #1B1D1F; }
  .admin-user-actions { display: flex; gap: 6px; flex-wrap: wrap; }
  .refund-admin-card { margin-top: 10px; padding: 12px; border: 1px solid #fed7aa; border-radius: 10px; background: #fff7ed; color: #7c2d12; font-size: 12px; }
  .refund-admin-card b { color: #9a3412; }
  .refund-admin-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin: 8px 0; }
  .refund-admin-grid div { padding: 8px; background: #fff; border: 1px solid #ffedd5; border-radius: 8px; }
  .refund-admin-card input { width: 100%; margin-top: 6px; padding: 8px 10px; border: 1px solid #fdba74; border-radius: 8px; box-sizing: border-box; font-size: 12px; }
  @media (max-width: 900px) {
    .admin-plan-form { grid-template-columns: 1fr; }
    .admin-user-toolbar { grid-template-columns: 1fr; }
    .admin-shell { flex-direction: column; }
    .admin-side { width: 100%; height: auto; position: static; flex-direction: row; flex-wrap: wrap; align-items: center; padding: 10px 12px; gap: 6px; }
    .admin-side__brand { border: 0; margin: 0; padding: 4px 8px; font-size: 14px; }
    .admin-side__nav { flex-direction: row; flex-wrap: wrap; flex: 1 1 100%; gap: 4px; }
    .admin-side__nav .admin-tab { width: auto; padding: 8px 12px; font-size: 13px; }
    .admin-side__foot { border: 0; margin: 0; padding: 0; flex-direction: row; flex: 1 1 100%; }
    .admin-side__email { display: none; }
    .admin-main { padding: 18px 14px 50px; }
    .admin-main__title { font-size: 20px; }
  }

  /* 채팅 모달 */
  .chat-modal { position: fixed; inset: 0; background: rgba(15,23,42,0.7); z-index: 9999; display: none; align-items: center; justify-content: center; padding: 16px; }
  .chat-box { background: #fff; max-width: 720px; width: 100%; height: 84vh; border-radius: 14px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); display: flex; flex-direction: column; overflow: hidden; }
  .chat-head { padding: 16px 20px; border-bottom: 1px solid #e2e8f0; display: flex; justify-content: space-between; align-items: center; }
  .chat-msgs { flex: 1; overflow-y: auto; padding: 18px; background: #FAFAFA; display: flex; flex-direction: column; gap: 10px; }
  .chat-input { padding: 12px 18px; border-top: 1px solid #e2e8f0; background: #fff; display: flex; gap: 8px; align-items: flex-end; }
  .chat-input input, .chat-input textarea { flex: 1; padding: 10px 12px; border: 1px solid #d1d5db; border-radius: 8px; font-family: inherit; font-size: 14px; line-height: 1.6; box-sizing: border-box; }
  .chat-input textarea { resize: vertical; min-height: 110px; max-height: 280px; }
  .bubble { max-width: 80%; padding: 10px 14px; border-radius: 14px; font-size: 13px; line-height: 1.5; white-space: pre-wrap; word-break: break-word; }
  .bubble-admin { align-self: flex-start; background: var(--brand); color: #fff; }
  .bubble-user { align-self: flex-end; background: #fff; color: #1B1D1F; border: 1px solid #e2e8f0; }
  .bubble-meta { font-size: 10px; color: #94a3b8; margin-bottom: 2px; }
  .gate { padding: 40px; text-align: center; color: #94a3b8; }
  #denyBox { background: #fff; max-width: 480px; margin: 80px auto; padding: 40px; border-radius: 14px; text-align: center; box-shadow: 0 2px 12px rgba(15,23,42,0.05); }
  .admin-login-box { background: #fff; max-width: 420px; margin: 90px auto; padding: 34px; border-radius: 14px; text-align: center; box-shadow: 0 2px 12px rgba(15,23,42,0.06); }
  .admin-login-box h2 { margin-bottom: 8px; }
  .admin-login-box p { margin: 0 0 18px; color: #64748b; font-size: 13px; }
  .admin-login-box input { width: 100%; box-sizing: border-box; padding: 12px 14px; border: 1px solid #cbd5e1; border-radius: 8px; font-size: 14px; margin-bottom: 10px; }
  .admin-login-box button { width: 100%; padding: 12px 14px; border: 0; border-radius: 8px; background: #1B1D1F; color: #fff; font-weight: 800; cursor: pointer; }
  .admin-login-box button:hover { background: #1e293b; }
  .admin-login-box a { display: inline-block; margin-top: 16px; color: var(--brand); text-decoration: none; font-weight: 700; font-size: 13px; }
  #adminLoginStatus { min-height: 18px; margin-top: 10px; color: #dc2626; font-size: 12px; }