:root {
  /* Font Families */
  --font-family-primary: 'Inter', sans-serif;
  
  /* Font Sizes */
  --font-size-body: 12px;
  --font-size-headline: 18px;
  
  /* Font Weights & Heights */
  --font-weight-body: 400;
  --font-weight-headline: 500;
  --font-line-height-body: 19.5px;
  --font-line-height-headline: 28px;
  --font-letter-spacing-headline: -0.025em;
  
  /* Colors */
  --color-primary: #4B4BA0;
  --color-secondary: #18181B;
  --color-tertiary: #8F47AE;
  --color-neutral: #18181B;
  
  --color-bg: #18181B;
  --color-surface: rgba(39, 39, 42, 0.7); /* Glass */
  --color-text-primary: #71717A;
  --color-text-secondary: #E4E4E7;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-solid: rgba(255, 255, 255, 0.5); /* For corner brackets */
  
  /* Spacing */
  --space-base: 8px;
  --space-2: 2px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Radius & Shadows & Motion */
  --radius-none: 0px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-pill: 9999px;
  
  --shadow-none: rgba(0, 0, 0, 0) 0px 0px 0px 0px;
  --shadow-glass: rgba(0, 0, 0, 0.05) 0px 1px 2px 0px;
  --shadow-hover: rgba(0, 0, 0, 0.06) 0px 12px 12px -6px;
  
  --motion-duration-fast: 150ms;
  --motion-duration-slow: 1000ms;
  --motion-ease: cubic-bezier(0.4, 0, 0.2, 1);
  
  --blur-amount: 20px;
}

/* Base Reset & Foundations */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-body);
  line-height: var(--font-line-height-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  
  /* Subtle diagonal background lines for light texture */
  background-image: repeating-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.02) 0,
    rgba(255, 255, 255, 0.02) 1px,
    transparent 1px,
    transparent 10px
  );
}

/* Accessibility: Focus Visible */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6, .headline {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-headline);
  font-weight: var(--font-weight-headline);
  line-height: var(--font-line-height-headline);
  letter-spacing: var(--font-letter-spacing-headline);
  color: var(--color-text-secondary);
}

/* Framed Grid Composition */
.app-container {
  display: grid;
  grid-template-columns: 1fr;
  width: 100%;
  min-height: 100vh;
}

.framed-section {
  position: relative;
  padding: var(--space-32);
  border-bottom: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.framed-section:first-child {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-32);
}

.framed-section:last-child {
  margin-bottom: var(--space-32);
}

/* L-shaped corner brackets */
.framed-section::before,
.framed-section::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
}
.framed-section::before {
  top: -1px;
  left: -1px;
  border-top: 1px solid var(--color-border-solid);
  border-left: 1px solid var(--color-border-solid);
}
.framed-section::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 1px solid var(--color-border-solid);
  border-right: 1px solid var(--color-border-solid);
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.whatsapp-btn {
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-body);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-8);
  transition: color var(--motion-duration-fast) var(--motion-ease), border-color var(--motion-duration-fast) var(--motion-ease);
  backdrop-filter: blur(var(--blur-amount));
}

.whatsapp-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Category Navigation */
.category-nav {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.category-btn {
  background-color: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-body);
  font-family: inherit;
  cursor: pointer;
  transition: color var(--motion-duration-fast) var(--motion-ease), border-color var(--motion-duration-fast) var(--motion-ease), background-color var(--motion-duration-fast) var(--motion-ease);
}

.category-btn:hover {
  color: var(--color-text-secondary);
  border-color: var(--color-text-secondary);
}

.category-btn.active {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.category-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Controls Bar */
.controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-16);
  gap: var(--space-12);
  flex-wrap: wrap;
}

.filter-controls {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.filter-select, .sort-select {
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: inherit;
  cursor: pointer;
}

.filter-select:focus, .sort-select:focus {
  border-color: var(--color-primary);
}

/* Loading & Error States */
.state-container {
  text-align: center;
  padding: var(--space-32) 0;
  color: var(--color-text-primary);
}

.error-message {
  color: var(--color-tertiary);
  border: 1px solid var(--color-border);
  padding: var(--space-16);
  border-radius: var(--radius-sm);
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-16);
  align-items: start;
}

@media (max-width: 600px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
  .framed-section {
    padding: var(--space-16);
  }
}

/* Product Card - Glassy Surface */
.product-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none); /* 0px radius as per components rule */
  overflow: hidden;
  box-shadow: var(--shadow-none); /* none shadow as per components rule */
  backdrop-filter: blur(var(--blur-amount));
  transition: border-color var(--motion-duration-fast) var(--motion-ease), box-shadow var(--motion-duration-fast) var(--motion-ease);
  display: flex;
  flex-direction: column;
  position: relative;
  padding: var(--space-10); /* 10px padding as per components rule */
}

.product-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.product-card-image-wrap {
  width: 100%;
  padding-top: 100%; /* 1:1 Aspect Ratio */
  position: relative;
  background-color: transparent;
  overflow: hidden;
  border-radius: var(--radius-none);
}

.product-card-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--motion-duration-fast) var(--motion-ease);
}

.product-card-image.placeholder {
  object-fit: contain;
  padding: var(--space-16);
  opacity: 0.2;
}

.product-card-content {
  padding-top: var(--space-12);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-title {
  font-size: var(--font-size-headline);
  font-weight: var(--font-weight-headline);
  line-height: var(--font-line-height-headline);
  letter-spacing: var(--font-letter-spacing-headline);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-desc {
  font-size: var(--font-size-body);
  color: var(--color-text-primary);
  margin-bottom: var(--space-16);
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-8);
}

.product-price {
  font-size: var(--font-size-headline);
  font-weight: var(--font-weight-headline);
  color: var(--color-text-secondary);
}

.product-stock {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-8);
  border-radius: var(--radius-pill);
}

.product-stock.out-of-stock {
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

/* Pagination Controls */
.pagination-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  margin-top: var(--space-32);
  flex-wrap: wrap;
}

.page-btn {
  background-color: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-body);
  font-family: inherit;
  cursor: pointer;
  transition: color var(--motion-duration-fast) var(--motion-ease);
}

.page-btn:hover {
  color: var(--color-text-secondary);
  border-color: var(--color-text-secondary);
}

.page-btn.active {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Modal Styles */
.product-modal {
  margin: auto;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  box-shadow: var(--shadow-none);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  backdrop-filter: blur(var(--blur-amount));
}

.product-modal::backdrop {
  background: rgba(24, 24, 27, 0.8);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.modal-close {
  position: absolute;
  top: var(--space-16);
  right: var(--space-16);
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  width: 32px;
  height: 32px;
  font-size: var(--font-size-headline);
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: color var(--motion-duration-fast) var(--motion-ease);
}

.modal-close:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.modal-body {
  overflow-y: auto;
  padding: var(--space-32);
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.modal-image {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  background-color: transparent;
  border-radius: var(--radius-none);
}

.modal-title {
  font-size: var(--font-size-headline);
  font-weight: var(--font-weight-headline);
  color: var(--color-text-secondary);
  line-height: var(--font-line-height-headline);
}

.modal-desc {
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text-primary);
}

.modal-price-stock {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-16);
  border-top: 1px solid var(--color-border);
}

.modal-price {
  font-size: var(--font-size-headline);
  font-weight: var(--font-weight-headline);
  color: var(--color-text-secondary);
}

.product-card {
  cursor: pointer;
}