:root {
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  
  /* Market Colors */
  --hmart-color: #e11d48;
  --hannam-color: #059669;
  --lotte-color: #d97706;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-dark);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
}

h1 {
  margin: 0 0 1rem 0;
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #1e293b 0%, #4f46e5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Navigation Bar */
.nav-menu {
  display: flex;
  justify-content: center;
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  transition: all 0.2s ease-in-out;
  color: var(--text-muted);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link:hover {
  background-color: #f1f5f9;
  color: var(--text-dark);
}

/* Active states for each market tab */
.nav-link.active-hmart {
  background-color: #ffe4e6;
  color: var(--hmart-color);
  border-color: #fecdd3;
  box-shadow: 0 4px 6px -1px rgba(225, 29, 72, 0.1);
}

.nav-link.active-hannam {
  background-color: #d1fae5;
  color: var(--hannam-color);
  border-color: #a7f3d0;
  box-shadow: 0 4px 6px -1px rgba(5, 96, 105, 0.1);
}

.nav-link.active-lotte {
  background-color: #fef3c7;
  color: var(--lotte-color);
  border-color: #fde68a;
  box-shadow: 0 4px 6px -1px rgba(217, 119, 6, 0.1);
}

.nav-link.active-home {
  background-color: #e0e7ff;
  color: var(--primary-color);
  border-color: #c7d2fe;
  box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.1);
}

/* Content Area */
main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1.5rem;
  box-sizing: border-box;
}

/* Page Intro */
.page-intro {
  text-align: center;
  margin-bottom: 3rem;
}

.page-intro h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.page-intro p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Grid Layout */
.sales-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

/* Product Card */
.product-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 20px -8px rgba(0, 0, 0, 0.08);
}

.badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  z-index: 10;
}

.badge-hmart { background-color: var(--hmart-color); }
.badge-hannam { background-color: var(--hannam-color); }
.badge-lotte { background-color: var(--lotte-color); }

.product-image-container {
  height: 200px;
  background-color: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border-bottom: 1px solid var(--border-color);
}

.product-info {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-category {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.product-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 0.75rem 0;
  line-height: 1.4;
}

.price-container {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: auto;
  margin-bottom: 1rem;
}

.sale-price {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ef4444;
}

.regular-price {
  font-size: 1rem;
  text-decoration: line-through;
  color: var(--text-muted);
}

.card-action {
  background-color: #f8fafc;
  border: 1px solid var(--border-color);
  color: var(--text-dark);
  padding: 0.75rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  font-size: 0.9rem;
}

.card-action:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Home Welcome Layout */
.welcome-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  padding: 3rem 2rem;
  text-align: center;
  max-width: 800px;
  margin: 2rem auto;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
}

.welcome-logo {
  font-size: 4rem;
  margin-bottom: 1.5rem;
}

.welcome-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.welcome-desc {
  color: var(--text-muted);
  font-size: 1.125rem;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.welcome-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.welcome-item {
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text-dark);
  transition: all 0.2s ease;
}

.welcome-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.welcome-item.hmart:hover { border-color: var(--hmart-color); }
.welcome-item.hannam:hover { border-color: var(--hannam-color); }
.welcome-item.lotte:hover { border-color: var(--lotte-color); }

.welcome-item-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.welcome-item-title {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Flyer Viewer styles */
.flyer-container {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  padding: 2rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
  margin: 1rem auto 3rem auto;
  max-width: 1000px;
}

.flyer-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.flyer-tab-btn {
  background-color: #f1f5f9;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.flyer-tab-btn:hover {
  background-color: #e2e8f0;
  color: var(--text-dark);
}

.flyer-tab-btn.active {
  background-color: var(--primary-color);
  color: white;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* H Mart specific active tab */
.hmart-theme .flyer-tab-btn.active {
  background-color: var(--hmart-color);
  box-shadow: 0 4px 6px -1px rgba(225, 29, 72, 0.2);
}

/* Hannam specific active tab */
.hannam-theme .flyer-tab-btn.active {
  background-color: var(--hannam-color);
  box-shadow: 0 4px 6px -1px rgba(5, 150, 105, 0.2);
}

/* Lotte specific active tab */
.lotte-theme .flyer-tab-btn.active {
  background-color: var(--lotte-color);
  box-shadow: 0 4px 6px -1px rgba(217, 119, 6, 0.2);
}

.flyer-image-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 1rem;
  overflow: hidden;
  background-color: #f8fafc;
  border: 1px solid var(--border-color);
  position: relative;
  box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  padding: 1rem;
  min-height: 400px;
}

.flyer-image {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
}

.flyer-image:hover {
  transform: scale(1.01);
}

.flyer-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.flyer-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-dark);
  padding: 0.6rem 1.2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.9rem;
}

.flyer-action-btn:hover {
  background-color: #f8fafc;
  border-color: #cbd5e1;
  transform: translateY(-1px);
}