@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Color Palette - Premium Modern */
  --bg-color: #0f111a;
  --bg-gradient: linear-gradient(135deg, #0f111a 0%, #1a1b2e 100%);
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  
  --accent-primary: #6366f1; /* Indigo */
  --accent-secondary: #ec4899; /* Pink */
  --accent-gradient: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-border: rgba(255, 255, 255, 0.05);
  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus: rgba(99, 102, 241, 0.5);
  
  --discount-bg: rgba(236, 72, 153, 0.1);
  --discount-text: #f472b6;
  
  --font-family: 'Inter', sans-serif;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  --border-radius-pill: 9999px;
}

/* Light Theme overrides - Unused right now but ready */
@media (prefers-color-scheme: light) {
  :root {
    --bg-color: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 1);
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: rgba(0, 0, 0, 0.05);
  }
}

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

body {
  font-family: var(--font-family);
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Base Layout */
header {
  padding: 120px 20px 40px;
  text-align: center;
  position: relative;
  z-index: 10;
}

.brand-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.brand-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  font-weight: 400;
  line-height: 1.6;
}

/* Search Bar (Glassmorphism) */
.search-container {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 20;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--input-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-pill);
  padding: 8px 16px;
  transition: var(--transition-normal);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.search-box:focus-within {
  border-color: var(--input-focus);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1), 0 12px 40px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.125rem;
  font-family: var(--font-family);
  padding: 12px;
  outline: none;
}

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

.search-icon {
  color: var(--text-secondary);
  padding: 10px;
}

.search-btn {
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: var(--border-radius-pill);
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.search-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Results Grid */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
  z-index: 10;
}

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

.results-count {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

/* Product Card - Glassmorphism */
.product-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  position: relative;
}

.product-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 15px 35px rgba(0,0,0, 0.2);
  background: rgba(255, 255, 255, 0.05);
}

.product-image-ctr {
  width: 100%;
  height: 200px;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  margin-bottom: 16px;
  background: rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: var(--transition-normal);
}

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

.product-brand {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-primary);
  font-weight: 700;
  margin-bottom: 8px;
}

.product-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-top: auto;
}

.product-prices {
  display: flex;
  flex-direction: column;
}

.price-current {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.price-old {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: line-through;
  margin-bottom: 4px;
}

.product-discount {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--discount-bg);
  color: var(--discount-text);
  padding: 6px 12px;
  border-radius: var(--border-radius-pill);
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.merchant-tag {
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
  padding: 4px 10px;
  border-radius: 6px;
}

/* Loaders / Empty States */
.loader-ctr {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s infinite linear;
  margin: 0 auto 16px;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

/* Background Decoration */
.bg-blob {
  position: absolute;
  filter: blur(100px);
  z-index: 0;
  opacity: 0.4;
  border-radius: 50%;
  animation: float 10s ease-in-out infinite;
}
.bg-blob-1 {
  top: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: var(--accent-primary);
}
.bg-blob-2 {
  top: 200px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: var(--accent-secondary);
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, 30px); }
}

/* Navegación Superior */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background: rgba(15, 17, 26, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  z-index: 100;
  transition: var(--transition-normal);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.5px;
}

.nav-brand svg {
  color: var(--accent-primary);
}

.nav-search-ctr {
  display: flex;
  align-items: center;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-pill);
  padding: 4px 12px;
  width: 250px;
  transition: var(--transition-normal);
  margin: 0 20px;
}

.nav-search-ctr:focus-within {
  border-color: var(--input-focus);
  background: rgba(255,255,255,0.08);
}

.top-search-icon {
  color: var(--text-secondary);
  margin-right: 8px;
}

.top-search-input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.9rem;
  outline: none;
  width: 100%;
}

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

.nav-filters {
  display: flex;
  align-items: center;
}

.nav-dropdown {
  position: relative;
  display: inline-block;
}

.store-dropdown-btn {
  background: var(--input-bg);
  color: var(--text-primary);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-pill);
  padding: 8px 16px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-fast);
}

.store-dropdown-btn:hover, .nav-dropdown:hover .store-dropdown-btn {
  border-color: var(--input-focus);
}

.dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  top: 110%;
  background-color: var(--bg-color);
  min-width: 200px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-sm);
  z-index: 200;
  max-height: 400px;
  overflow-y: auto;
}

.nav-dropdown:hover .dropdown-content {
  display: block;
}

.dropdown-item {
  color: var(--text-primary);
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255,255,255,0.02);
  transition: var(--transition-fast);
}

.dropdown-item:hover {
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary);
}

@media (max-width: 768px) {
  .brand-title { font-size: 2.2rem; }
  .search-btn { padding: 10px 20px; }
  .products-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}