/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */
:root {
  --color-bg: #FAF7F5;
  --color-surface: #FFFFFF;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #8B6A4E;
  --color-text-muted: #B5A192;
  --color-accent: #B08463;
  --color-accent-hover: #96704F;
  --color-accent-light: #F5EDE7;
  --color-border: #E8DDD5;
  --color-success: #10B981;
  --color-code-bg: #F3EDE8;
  --color-hero-start: #1A1A1A;
  --color-hero-end: #333333;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.12);
  --transition: 0.2s ease;
}

/* ============================================================
   2. BASE & TYPOGRAPHY
   ============================================================ */
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-size: 16px;
  font-weight: 400;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   3. HERO SECTION
   ============================================================ */
.hero {
  background: linear-gradient(135deg, var(--color-hero-start) 0%, var(--color-hero-end) 100%);
  color: #fff;
  text-align: center;
  padding: 72px 24px 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.04) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero-accent {
  color: #F5E6D3;
}

.hero-subtitle {
  font-size: 1.125rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  max-width: 500px;
  margin: 0 auto;
}

/* ============================================================
   4. STICKY FILTER BAR
   ============================================================ */
.filter-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 245, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  transition: box-shadow var(--transition);
}

.filter-bar.scrolled {
  box-shadow: var(--shadow-sm);
}

.filter-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1.5px solid var(--color-border);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  transition: all var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

.tab-btn.active {
  color: #fff;
  border-color: transparent;
}

.tab-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.search-wrapper {
  position: relative;
  min-width: 220px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 9px 14px 9px 38px;
  border: 1.5px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.875rem;
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(176, 132, 99, 0.15);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

/* ============================================================
   5. MAIN CONTENT
   ============================================================ */
.main-content {
  padding: 32px 0 64px;
}

.deals-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.deals-count {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ============================================================
   6. DEAL CARDS GRID
   ============================================================ */
.deals-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.deal-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.deal-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

/* Card image */
.card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: #F8F8F8;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
  transition: transform 0.3s ease;
}

.deal-card:hover .card-image img {
  transform: scale(1.05);
}

.card-image .discount-badge {
  position: absolute;
  top: 12px;
  right: 12px;
}

.card-image-placeholder {
  background: linear-gradient(135deg, #F3EDE8 0%, #E8DDD5 100%);
}

.placeholder-initial {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  opacity: 0.85;
  letter-spacing: -0.02em;
}

.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.card-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.price-original {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.price-sale {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
}

.card-product-title {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Card top row: category + price */
.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.card-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.card-category-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.discount-badge {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  transform: rotate(-2deg);
  flex-shrink: 0;
  letter-spacing: -0.01em;
}

/* Brand name */
.card-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

/* Promo code strip */
.code-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-code-bg);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  gap: 12px;
  margin-top: auto;
}

.code-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.code-value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.05em;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition);
  flex-shrink: 0;
}

.copy-btn:hover {
  background: var(--color-surface);
  color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.copy-btn.copied {
  color: var(--color-success);
}

.copy-btn svg {
  width: 18px;
  height: 18px;
}

/* Card footer: expiry + shop link */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
}

.card-expiry {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.card-expiry svg {
  width: 14px;
  height: 14px;
}

.card-expiry.expiring-soon {
  color: var(--color-accent);
  font-weight: 600;
}

.shop-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
  transition: all var(--transition);
  white-space: nowrap;
}

.shop-btn:hover {
  background: var(--color-accent);
  color: #fff;
}

.shop-btn svg {
  width: 14px;
  height: 14px;
}

/* ============================================================
   7. TOAST NOTIFICATION
   ============================================================ */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-success);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  transform: translateX(120%);
  transition: transform 0.3s ease;
  z-index: 1000;
}

.toast.show {
  transform: translateX(0);
}

/* ============================================================
   8. EMPTY STATE
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--color-text-secondary);
}

.empty-state h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.empty-state p {
  font-size: 0.9rem;
}

/* ============================================================
   9. FOOTER
   ============================================================ */
.footer {
  background: var(--color-hero-start);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  padding: 40px 24px;
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.footer-disclaimer {
  font-size: 0.8rem;
  margin-bottom: 4px;
}

.footer-copyright {
  font-size: 0.75rem;
}

/* ============================================================
   10. ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.deal-card {
  animation: fadeInUp 0.4s ease both;
}

.deal-card:nth-child(3n+2) { animation-delay: 0.05s; }
.deal-card:nth-child(3n+3) { animation-delay: 0.1s; }

/* ============================================================
   11. RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .deals-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .deal-card:nth-child(2n+2) { animation-delay: 0.05s; }
  .deal-card:nth-child(2n+1) { animation-delay: 0s; }
}

@media (max-width: 768px) {
  .hero {
    padding: 48px 24px 40px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .filter-bar-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .category-tabs {
    justify-content: center;
  }

  .search-wrapper {
    min-width: 100%;
  }

  .deals-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .deal-card { animation-delay: 0s !important; }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .tab-btn {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  .container {
    padding: 0 16px;
  }
}