/* ========================================
   Design Tokens
   ======================================== */

:root {
  --color-primary: #2D5016;
  --color-primary-light: #3A6B1E;
  --color-secondary: #8B6914;
  --color-bg: #FAF7F2;
  --color-card: #FFFFFF;
  --color-text: #3B3128;
  --color-text-light: #6B5E52;
  --color-border: #E8E2D9;
  --color-tag-bg: #EDE8DF;
  --color-tag-text: #5A4E42;

  --shadow-card: 0 2px 8px rgba(59, 49, 40, 0.08);
  --shadow-card-hover: 0 4px 16px rgba(59, 49, 40, 0.14);

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-pill: 100vw;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --max-width: 1200px;
  --transition: 0.2s ease;
}

/* ========================================
   Reset & Base
   ======================================== */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ========================================
   Hero
   ======================================== */

.hero {
  background-color: var(--color-primary);
  color: #FFFFFF;
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
}

.hero__content {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero__title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.hero__tagline {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 36rem;
  margin: 0 auto;
}

/* ========================================
   Filter Bar
   ======================================== */

.filter-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.filter-bar__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.filter-bar__buttons {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: nowrap;
}

.filter-btn {
  flex-shrink: 0;
  padding: var(--space-sm) var(--space-lg);
  min-height: 2.75rem;
  border-radius: var(--radius-pill);
  background-color: var(--color-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  font-size: 0.9375rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

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

.filter-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.filter-btn[aria-pressed="true"] {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

/* ========================================
   Products Grid
   ======================================== */

.products {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md) var(--space-3xl);
}

.products__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

/* ========================================
   Product Card
   ======================================== */

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.card__image-wrapper {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-border);
}

.card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-lg);
}

.card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.card__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

.card__description {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.5;
  margin-bottom: var(--space-lg);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-top: auto;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
  font-weight: 500;
  background-color: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.card__buy-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition);
}

.card__buy-btn:hover {
  background-color: var(--color-primary-light);
}

.card__buy-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ========================================
   Loading & Error States
   ======================================== */

.loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
}

.loading__text {
  font-size: 1.125rem;
  color: var(--color-text-light);
}

.error {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
}

.error__text {
  font-size: 1.125rem;
  color: #9B2C2C;
}

/* ========================================
   Footer
   ======================================== */

.footer {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  color: var(--color-text-light);
  font-size: 0.875rem;
  border-top: 1px solid var(--color-border);
}

/* ========================================
   Responsive: Tablet (768px+)
   ======================================== */

@media (min-width: 768px) {
  .hero {
    padding: var(--space-3xl) var(--space-xl);
  }

  .hero__title {
    font-size: 3rem;
  }

  .hero__tagline {
    font-size: 1.25rem;
  }

  .products__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================
   Responsive: Desktop (1024px+)
   ======================================== */

@media (min-width: 1024px) {
  .hero {
    padding: var(--space-3xl) var(--space-xl);
  }

  .hero__title {
    font-size: 3.5rem;
  }

  .products__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}