:root {
  --bg-main: #F8FAFC;
  --bg-sub: #F1F5F9;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFC;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: #E2E8F0;
  --border-focus: #3B82F6;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-dim: #94A3B8;
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --accent: #4F46E5;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-glow: 0 4px 14px 0 rgba(37, 99, 235, 0.2);
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  --shadow-subtle: 0 1px 3px 0 rgba(0, 0, 0, 0.06), 0 1px 2px -1px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.app-layout {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px 32px 64px 32px;
  width: 100%;
}

/* Header Base Styles (PC: 1줄 가로 레이아웃) */
.app-header {
  display: flex;
  flex-direction: row;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 12px 20px;
  margin-bottom: 24px;
  gap: 16px;
}

.header-top-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
}

.logo-icon {
  font-size: 20px;
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

.brand-text h1 {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  white-space: nowrap;
}

.user-pill-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  padding: 6px 12px;
  border-radius: 9999px;
  flex-shrink: 0;
  margin-left: auto;
}

.nav-user-label {
  font-size: 12px;
  font-weight: 800;
  color: #4338CA;
  white-space: nowrap;
}

.btn-logout {
  background: transparent;
  border: none;
  font-size: 11px;
  font-weight: 700;
  color: #E11D48;
  cursor: pointer;
  padding: 0 2px;
  border-left: 1px solid #C7D2FE;
  padding-left: 8px;
}

.header-nav-scroll-wrap {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.header-nav-scroll-wrap::-webkit-scrollbar {
  display: none;
}

.nav-tab-group {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.nav-tab-btn {
  background: #F8FAFC;
  color: #334155;
  border: 1px solid #CBD5E1;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  transition: all 0.2s;
  flex-shrink: 0;
}

.nav-tab-btn[data-view="discovery"] {
  background: #EEF2FF;
  color: #4F46E5;
  border-color: #C7D2FE;
}

.header-quick-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-header-saved {
  background: #FEF3C7;
  color: #D97706;
  border: 1px solid #FDE68A;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
  white-space: nowrap;
}

.saved-count-pill {
  background: #D97706;
  color: #FFFFFF;
  padding: 1px 6px;
  border-radius: 10px;
  font-size: 11px;
}

#wing-auth-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: #F8FAFC;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid #CBD5E1;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 12px;
  font-weight: 700;
  color: #475569;
  white-space: nowrap;
}

#wing-status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #94A3B8;
  flex-shrink: 0;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-sub);
  padding: 8px 14px;
  border-radius: 30px;
  border: 1px solid var(--border-color);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
  background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
  color: #FFFFFF;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.bg-indigo { background: #EEF2FF; }
.bg-emerald { background: #ECFDF5; }
.bg-blue { background: #EFF6FF; }
.bg-amber { background: #FFFBEB; }

.stat-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}

.stat-value {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-main);
}

.text-sm {
  font-size: 14px !important;
  font-weight: 600;
  color: #334155;
}

/* Sync Notification Banner */
.sync-banner {
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  color: #166534;
  animation: fadeIn 0.3s ease;
  box-shadow: var(--shadow-subtle);
}

.banner-icon { font-size: 20px; }
.banner-content { flex: 1; font-size: 14px; font-weight: 600; }
.banner-close {
  background: transparent;
  border: none;
  color: #86EFAC;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
}
.banner-close:hover { color: #166534; }

/* Control Bar */
.control-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 300px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: var(--text-dim);
}

.search-wrapper input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px 12px 42px;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
  box-shadow: var(--shadow-subtle);
  transition: all 0.2s;
}

.search-wrapper input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.view-toggles {
  display: flex;
  background: var(--bg-sub);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.toggle-btn.active {
  background: var(--bg-card);
  color: var(--primary);
  box-shadow: var(--shadow-subtle);
}

/* Tree Grid View */
.tree-grid-view {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-subtle);
  transition: all 0.2s;
}

.category-card:hover {
  box-shadow: var(--shadow-card);
  border-color: #CBD5E1;
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid #F1F5F9;
  padding-bottom: 12px;
}

.l1-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.l1-badge {
  background: #EFF6FF;
  color: #2563EB;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid #DBEAFE;
}

.l1-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
}

.card-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s;
}

.card-link:hover {
  color: #1D4ED8;
  text-decoration: underline;
}

.subcategories-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sub-tag {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  color: #334155;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

/* Modal Open Body Scroll Lock */
body.modal-open {
  overflow: hidden !important;
  touch-action: none;
}

/* Product Modal */
.product-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
  overscroll-behavior: contain;
}

.product-modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 1100px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  animation: fadeIn 0.2s ease-out;
  overscroll-behavior: contain;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border-color);
  background: #F8FAFC;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-title {
  font-size: 19px;
  font-weight: 800;
  margin-top: 4px;
  color: var(--text-main);
}

.modal-close-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 16px;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.modal-close-btn:hover {
  background: #E2E8F0;
  color: var(--text-main);
}

.modal-body {
  padding: 24px 28px;
  overflow-y: auto;
}

.products-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.product-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: grid;
  grid-template-columns: 80px 1fr 240px;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.product-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border-color: #93C5FD;
}

.product-img-wrap {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  border: 1px solid #F1F5F9;
  background-color: #F8FAFC;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.product-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-info-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.product-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-metrics-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  border-left: 1px dashed #E2E8F0;
  padding-left: 16px;
}

.product-price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.product-price {
  font-size: 17px;
  font-weight: 800;
  color: #DC2626;
}

.product-original-price {
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: line-through;
}

.product-discount {
  font-size: 13px;
  font-weight: 700;
  color: #DC2626;
}

.product-rating-row {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.product-link-btn {
  padding: 5px 12px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  color: #1D4ED8;
  text-align: center;
  text-decoration: none;
  transition: all 0.15s;
}

.product-link-btn:hover {
  background: #2563EB;
  color: #FFFFFF;
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  overscroll-behavior: contain;
}

.loader-box {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 48px;
  text-align: center;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid #E2E8F0;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px auto;
}

.loader-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.hidden {
  display: none !important;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* ==========================================================================
   정통 계층형 브랜치 트리 (IDE Style Tree Node)
   ========================================================================== */
.tree-node-item {
  position: relative;
  margin: 3px 0;
  font-family: var(--font-family);
}

.tree-node-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.15s ease;
  user-select: none;
}

.tree-node-row:hover {
  background: #F1F5F9;
}

.tree-toggle-btn {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  color: #64748B;
  background: #E2E8F0;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}

.tree-toggle-btn:hover {
  background: #CBD5E1;
  color: #0F172A;
}

.tree-children-container {
  position: relative;
  margin-left: 20px;
  padding-left: 14px;
  border-left: 1.5px solid #CBD5E1;
}

.tree-node-actions {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-left: 8px;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.tree-node-row:hover .tree-node-actions {
  opacity: 1;
}

.tree-link-text {
  color: #1E293B;
  text-decoration: none;
  transition: color 0.15s ease;
}

.tree-link-text:hover {
  color: #2563EB;
  text-decoration: underline;
}


.sidebar-l1-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  margin-bottom: 4px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: #334155;
  transition: all 0.15s ease;
}

.sidebar-l1-item:hover {
  background: #F1F5F9;
  color: #0F172A;
}

.sidebar-l1-item.active {
  background: #EFF6FF;
  color: #2563EB;
  font-weight: 800;
  border: 1px solid #BFDBFE;
}

/* =========================================================================
   ⚡ 초고속 상품 발굴기 뷰 (views/discovery.html) 전용 스타일
   ========================================================================= */
.hero-section-fast {
  background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #0F172A 100%);
  border-radius: var(--radius-lg);
  padding: 44px 32px;
  color: #FFFFFF;
  text-align: center;
  margin-bottom: 32px;
  box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.4), 0 0 20px rgba(99, 102, 241, 0.2);
  border: 1px solid #4338CA;
  position: relative;
  overflow: hidden;
}
.hero-section-fast::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(129, 140, 248, 0.18) 0%, transparent 60%);
  pointer-events: none;
}
.hero-badge-fast {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(99, 102, 241, 0.25);
  border: 1px solid rgba(165, 180, 252, 0.4);
  padding: 6px 16px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 800;
  color: #C7D2FE;
  margin-bottom: 16px;
}
.hero-title-fast {
  font-size: 32px;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  line-height: 1.3;
}
.hero-desc-fast {
  font-size: 15px;
  color: #CBD5E1;
  max-width: 680px;
  margin: 0 auto 32px;
  line-height: 1.6;
}
.tier-selector-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 860px;
  margin: 0 auto 32px;
  text-align: left;
}
.tier-card {
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(12px);
  border: 2px solid #334155;
  border-radius: var(--radius-md);
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
.tier-card:hover {
  border-color: #818CF8;
  transform: translateY(-2px);
  background: rgba(51, 65, 85, 0.8);
}
.tier-card.active {
  border-color: #6366F1;
  background: rgba(99, 102, 241, 0.15);
  box-shadow: 0 0 0 1px #6366F1, 0 10px 15px -3px rgba(99, 102, 241, 0.2);
}
.tier-card.active::after {
  content: '✓';
  position: absolute;
  top: 12px;
  right: 14px;
  width: 22px;
  height: 22px;
  background: #6366F1;
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 900;
}
.tier-icon {
  font-size: 24px;
  margin-bottom: 8px;
}
.tier-name {
  font-size: 16px;
  font-weight: 800;
  color: #F8FAFC;
  margin-bottom: 4px;
}
.tier-scope {
  font-size: 12px;
  font-weight: 600;
  color: #94A3B8;
  margin-bottom: 6px;
}
.tier-desc {
  font-size: 12px;
  color: #64748B;
  line-height: 1.4;
}
.btn-search-hero-fast {
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  color: #FFFFFF;
  border: none;
  font-size: 18px;
  font-weight: 800;
  padding: 16px 44px;
  border-radius: 9999px;
  cursor: pointer;
  box-shadow: 0 10px 20px -5px rgba(99, 102, 241, 0.5);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.btn-search-hero-fast:hover {
  transform: scale(1.03);
  box-shadow: 0 15px 25px -5px rgba(99, 102, 241, 0.7);
}
.btn-search-hero-fast:active {
  transform: scale(0.98);
}

/* 결과 카테고리 헤더 */
.result-category-header-fast {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border: 1px solid #E2E8F0;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.res-cat-badge-fast {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 6px;
  background: #EEF2FF;
  color: #4F46E5;
  border: 1px solid #C7D2FE;
}
.res-cat-title {
  font-size: 20px;
  font-weight: 800;
  color: #0F172A;
}

/* 상품 카드 디자인 */
.product-grid-fast {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.product-card-fast {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 18px 24px;
  box-shadow: var(--shadow-subtle);
  display: grid;
  grid-template-columns: 110px 1fr 260px;
  gap: 24px;
  align-items: center;
  transition: all 0.2s ease;
}
.product-card-fast:hover {
  border-color: #818CF8;
  box-shadow: 0 10px 20px -4px rgba(99, 102, 241, 0.15);
  transform: translateY(-2px);
}
.product-img-wrap, .product-thumb-box {
  width: 90px !important;
  height: 90px !important;
  min-width: 90px !important;
  max-width: 90px !important;
  aspect-ratio: 1 / 1 !important;
  border-radius: 8px;
  overflow: hidden;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0 !important;
}
.product-img, .product-thumb-box img {
  width: 100% !important;
  height: 100% !important;
  max-width: 100% !important;
  max-height: 100% !important;
  object-fit: contain !important;
  aspect-ratio: 1 / 1 !important;
}
.product-info-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.product-name {
  font-size: 15px;
  font-weight: 700;
  color: #1E293B;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-metrics-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  text-align: right;
}
.product-price-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.product-price {
  font-size: 20px;
  font-weight: 900;
  color: #DC2626;
  font-family: 'Outfit', sans-serif;
}
.product-original-price {
  font-size: 13px;
  color: #94A3B8;
  text-decoration: line-through;
}
.product-discount {
  font-size: 14px;
  font-weight: 800;
  color: #DC2626;
}
.product-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #F1F5F9;
  color: #334155;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
  text-decoration: none;
  border: 1px solid #CBD5E1;
  transition: all 0.2s;
}
.product-link-btn:hover {
  background: #4F46E5;
  color: #FFFFFF;
  border-color: #4F46E5;
}

/* =========================================================================
   ⚙️ 시스템 환경 설정 뷰 (views/settings.html) 토글 스위치 및 카드 스타일
   ========================================================================= */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
  flex-shrink: 0;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #CBD5E1;
  transition: .25s;
  border-radius: 34px;
}
.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .25s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
input:checked + .toggle-slider {
  background-color: #2563EB;
}
input:checked + .toggle-slider:before {
  transform: translateX(24px);
}
.btn-danger-outline {
  background: #FFF1F2;
  color: #E11D48;
  border: 1px solid #FECDD3;
  padding: 8px 14px;
  font-weight: 700;
  font-size: 13px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-danger-outline:hover {
  background: #FFE4E6;
  border-color: #FDA4AF;
}

/* =========================================================================
   📱 모바일 & 태블릿 종합 반응형 디자인 시스템 (Responsive Web System)
   ========================================================================= */

/* =========================================================================
   📱 Z폴드 / 모바일 전면 초슬림 화면 대응 (Responsive Web Complete Fix)
   ========================================================================= */
html, body {
  overflow-x: hidden !important;
  max-width: 100vw !important;
  width: 100% !important;
}

/* 1. 태블릿 & 작은 화면 (Max Width: 960px) */
@media (max-width: 960px) {
  .app-layout {
    padding: 14px 16px 48px 16px !important;
    max-width: 100% !important;
    overflow-x: hidden !important;
  }
  
  .tier-selector-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px !important;
  }

  .product-card-fast {
    grid-template-columns: 100px 1fr 200px !important;
    gap: 16px !important;
    padding: 16px !important;
  }

  #tree-view {
    grid-template-columns: 240px 1fr !important;
    gap: 16px !important;
  }
}

/* 2. Z폴드7 전면(300~360px) 및 스마트폰 모바일 화면 (Max Width: 768px) */
@media (max-width: 768px) {
  .app-layout {
    padding: 10px 10px 40px 10px !important;
    max-width: 100% !important;
    overflow-x: hidden !important;
  }

  /* Header 모바일 완전 최적화 */
  .app-header {
    display: flex !important;
    flex-direction: column !important;
    padding: 12px 14px !important;
    gap: 10px !important;
    border-radius: 14px !important;
    margin-bottom: 16px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .header-top-bar {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    gap: 8px !important;
  }

  .brand {
    gap: 8px !important;
  }

  .brand-text h1 {
    font-size: 15px !important;
    white-space: nowrap !important;
  }

  .logo-icon {
    width: 32px !important;
    height: 32px !important;
    font-size: 16px !important;
  }

  .user-pill-wrap {
    padding: 4px 8px !important;
    gap: 6px !important;
    flex-shrink: 0 !important;
  }

  .nav-user-label {
    font-size: 11px !important;
    max-width: 60px !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  .btn-logout {
    font-size: 11px !important;
    padding-left: 6px !important;
  }

  /* 2단: 네비게이션 4개 메뉴를 2x2 균등 그리드로 화면 안에 100% 노출 */
  .header-nav-scroll-wrap {
    display: block !important;
    width: 100% !important;
    overflow: visible !important;
    padding: 6px 0 !important;
    border-top: 1px solid #F1F5F9 !important;
  }

  .nav-tab-group {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 6px !important;
    width: 100% !important;
  }

  .nav-tab-btn {
    padding: 8px 6px !important;
    font-size: 12px !important;
    font-weight: 800 !important;
    justify-content: center !important;
    text-align: center !important;
    width: 100% !important;
    box-sizing: border-box !important;
    border-radius: 8px !important;
  }

  /* 3단: 보관함 & 윙 상태 (2열 대칭 그리드) */
  .header-quick-actions {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 8px !important;
    width: 100% !important;
    padding-top: 8px !important;
    border-top: 1px solid #F1F5F9 !important;
    box-sizing: border-box !important;
  }

  .btn-header-saved {
    padding: 8px 10px !important;
    font-size: 11.5px !important;
    justify-content: center !important;
    width: 100% !important;
  }

  #wing-auth-box {
    padding: 8px 10px !important;
    font-size: 11.5px !important;
    justify-content: center !important;
    width: 100% !important;
  }

  /* Hero 섹션 & 등급 카드 */
  .hero-section-fast {
    padding: 22px 14px !important;
    border-radius: 12px !important;
    margin-bottom: 16px !important;
  }

  .hero-title-fast {
    font-size: 18px !important;
    line-height: 1.35 !important;
    margin-bottom: 8px !important;
  }

  .hero-desc-fast {
    font-size: 12px !important;
    margin-bottom: 16px !important;
    line-height: 1.5 !important;
  }

  .tier-selector-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
    margin-bottom: 16px !important;
  }

  .tier-card {
    padding: 12px 10px !important;
    border-radius: 10px !important;
  }

  .tier-icon {
    font-size: 18px !important;
    margin-bottom: 2px !important;
  }

  .tier-name {
    font-size: 13px !important;
  }

  .tier-scope {
    font-size: 10px !important;
    margin-bottom: 2px !important;
  }

  .tier-desc {
    font-size: 10.5px !important;
    line-height: 1.25 !important;
  }

  .btn-search-hero-fast {
    font-size: 14px !important;
    padding: 12px 16px !important;
    width: 100% !important;
  }

  /* 키워드 검색바 */
  #sticky-keyword-bar {
    width: 100% !important;
    margin-bottom: 16px !important;
  }

  /* 🛍️ 상품 카드 (모바일 앱 스타일: 상단 대형 1:1 이미지 피드) */
  .product-card-fast {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    padding: 16px !important;
    gap: 14px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* 1. 상단 대형 이미지 중앙 정렬 (1:1 정품 정사각형) */
  .product-thumb-box, .product-img-wrap {
    width: 100% !important;
    max-width: 240px !important;
    height: auto !important;
    aspect-ratio: 1 / 1 !important;
    margin: 0 auto !important;
    border-radius: 12px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    background: #FFFFFF !important;
    border: 1px solid #E2E8F0 !important;
    overflow: hidden !important;
  }

  .product-thumb-box img, .product-img {
    width: 100% !important;
    height: 100% !important;
    max-width: 100% !important;
    max-height: 100% !important;
    object-fit: contain !important;
    aspect-ratio: 1 / 1 !important;
    display: block !important;
  }

  /* 2. 중앙 컨텐츠 영역 패딩 제거 및 100% 너비 확보 */
  .product-info {
    padding: 0 !important;
    width: 100% !important;
  }

  .product-name {
    font-size: 14px !important;
    white-space: normal !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    line-height: 1.45 !important;
    margin: 8px 0 4px 0 !important;
  }

  /* 3. 4대 실측 지표 박스 2x2 모바일 최적화 */
  .product-info > div:nth-of-type(3) {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
    padding: 10px !important;
  }

  .product-metrics-wrap {
    border-left: none !important;
    border-top: 1px dashed #E2E8F0 !important;
    padding-left: 0 !important;
    padding-top: 12px !important;
    align-items: stretch !important;
    width: 100% !important;
  }

  .product-metrics-wrap > div:last-child {
    display: flex !important;
    justify-content: space-between !important;
    gap: 8px !important;
    width: 100% !important;
  }

  .product-link-btn {
    flex: 1 !important;
    text-align: center !important;
    justify-content: center !important;
    padding: 10px 14px !important;
    font-size: 13px !important;
  }

  .btn-save-toggle {
    padding: 10px 14px !important;
    font-size: 13px !important;
  }

  /* 🚀 발굴 로딩 모달 모바일 최적화 (가운데 정렬 및 패딩 조절) */
  .loading-overlay {
    padding: 14px !important;
    align-items: center !important;
    justify-content: center !important;
  }

  .loader-box {
    width: 90% !important;
    max-width: 320px !important;
    padding: 20px 16px !important;
    border-radius: 14px !important;
    margin: 0 auto !important;
  }

  #loader-title {
    font-size: 15px !important;
    line-height: 1.35 !important;
  }

  #loader-current-status {
    font-size: 11.5px !important;
    margin: 6px 0 10px !important;
  }

  .spinner {
    width: 32px !important;
    height: 32px !important;
    margin-bottom: 10px !important;
  }

  /* 모달 & 팝업 반응형 (바텀 시트 스타일) */
  .product-modal-overlay {
    padding: 0 !important;
    align-items: flex-end !important;
  }

  .product-modal-box {
    max-height: 88vh !important;
    border-radius: 18px 18px 0 0 !important;
    max-width: 100% !important;
    width: 100% !important;
  }

  .modal-header {
    padding: 14px 16px !important;
  }

  .modal-body {
    padding: 14px 16px !important;
  }

  /* 카테고리 관리자 화면 반응형 */
  #tree-view {
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
  }

  #l1-sidebar {
    width: 100% !important;
    position: static !important;
    display: flex !important;
    overflow-x: auto !important;
    white-space: nowrap !important;
    padding: 6px !important;
    gap: 6px !important;
  }

  .sidebar-l1-item {
    display: inline-flex !important;
    padding: 6px 10px !important;
    font-size: 11.5px !important;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
  }

  .control-bar {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 8px !important;
  }

  .view-toggles {
    display: flex !important;
    flex-wrap: wrap !important;
    width: 100% !important;
  }

  .toggle-btn {
    flex: 1 1 calc(50% - 4px) !important;
    text-align: center !important;
    justify-content: center !important;
    padding: 7px 8px !important;
    font-size: 11.5px !important;
  }
}

/* 3. Z폴드 커버 화면 초슬림 (Max Width: 360px) */
@media (max-width: 360px) {
  .tier-selector-grid {
    grid-template-columns: 1fr !important;
  }

  .brand-text h1 {
    font-size: 13px !important;
  }

  .logo-icon {
    width: 30px !important;
    height: 30px !important;
    font-size: 15px !important;
  }

  .btn-header-saved, #wing-auth-box, .user-box-header {
    padding: 4px 6px !important;
    font-size: 10px !important;
  }
}