/*
 * ThaiNguyenPC Component Styles
 * Reusable UI components
 */

/* ========================================
   RESET & BASE
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
}

/* Focus visible (a11y) - do not remove outline for keyboard users */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Product card: outline only on inner link, not the whole card */
.product-card a:focus-visible {
  outline-offset: 4px;
  border-radius: var(--radius-md);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ========================================
   CONTAINER
   ======================================== */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1280px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
  text-decoration: none;
  border: var(--border-width-2) solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary);
  background-image: linear-gradient(180deg, rgba(255,255,255, 0.1) 0%, rgba(255,255,255, 0) 100%);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-primary);
  transform: translateY(-2px);
  background-image: linear-gradient(180deg, rgba(255,255,255, 0.2) 0%, rgba(255,255,255, 0) 100%);
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

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

/* Outline Button */
.btn-outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border-dark);
}

.btn-outline:hover {
  background-color: var(--color-bg-alt);
  border-color: var(--color-text);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-bg-alt);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ========================================
   BADGES
   ======================================== */

.badge,
.product-card__badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
}

.badge-sale {
  background-color: var(--color-sale);
  color: var(--color-white);
}

.badge-new {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.badge-hot {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.badge-stock {
  background-color: var(--color-success);
  color: var(--color-white);
}

/* ========================================
   CARDS
   ======================================== */

.card {
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.card-body {
  padding: var(--space-4);
}

.card-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background-color: var(--color-bg-alt);
}

/* ========================================
   PRODUCT CARD
   ======================================== */

.product-card {
  position: relative;
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.product-card__badges {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  z-index: 10;
}

.product-card__image {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.product-card__image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform var(--transition-slow);
}

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

.product-card__content {
  padding: var(--space-4);
}

.product-card__category {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.product-card__title {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: var(--leading-snug);
}

.product-card__title a {
  color: inherit;
}

.product-card__title a:hover {
  color: var(--color-primary);
}

.product-card__price {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.product-card__price-current {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-sale);
}

.product-card__price-original {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-decoration: line-through;
}

.product-card__actions {
  display: flex;
  gap: var(--space-2);
}

.product-card__btn-cart {
  flex: 1;
}

.product-card__btn-wishlist {
  width: 40px;
  height: 40px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-alt);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.product-card__btn-wishlist:hover {
  background-color: var(--color-accent-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ========================================
   SECTION HEADERS
   ======================================== */

.section {
  padding: var(--space-12) 0;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: 0;
}

.section-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.section-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.section-link:hover {
  text-decoration: underline;
}

/* View-all links (used in section headers) */
.view-all-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.view-all-link:hover {
  color: var(--color-primary-hover);
}

.view-all-link--ghost {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}

.view-all-link--ghost:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg-alt);
}

/* ========================================
   FORM ELEMENTS
   ======================================== */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-light);
}

/* ========================================
   COUNTDOWN TIMER
   ======================================== */

.countdown {
  display: flex;
  gap: var(--space-2);
}

.countdown__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 48px;
}

.countdown__value {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  min-width: 48px;
  text-align: center;
}

.countdown__label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
  text-transform: uppercase;
}

/* ========================================
   CATEGORY TABS
   ======================================== */

.category-tabs {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.category-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  min-width: 80px;
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  color: var(--color-text);
}

.category-tab:hover,
.category-tab.active {
  border-color: var(--color-primary);
  background-color: var(--color-accent-soft);
}

.category-tab__icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
}

.category-tab__label {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-align: center;
  white-space: nowrap;
}

/* ========================================
   GRID LAYOUTS
   ======================================== */

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }
}

/* ========================================
   UTILITIES
   ======================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: var(--font-bold); }
.font-semibold { font-weight: var(--font-semibold); }
.font-medium { font-weight: var(--font-medium); }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-sale { color: var(--color-sale); }

.bg-dark { background-color: var(--color-bg-dark); color: var(--color-text-inverse); }
.bg-alt { background-color: var(--color-bg-alt); }

.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Spacing utilities */
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }
.p-4 { padding: var(--space-4); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }