/* Phase 1 (HTML+CSS only)
   Goals: semantic layout, tableless product grid, hover/click cart overlay */

:root {
  --bg: #0b1220;
  --surface: #111b30;
  --surface-2: #162445;
  --text: #e8eefc;
  --muted: rgba(232, 238, 252, 0.72);
  --border: rgba(232, 238, 252, 0.14);
  --brand: #7c5cff;
  --brand-2: #21d4fd;
  --danger: #ff4d6d;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  --radius: 14px;
  --radius-sm: 10px;
  --max: 1120px;
  --anchor-offset: 10.5rem;
}

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

[hidden] {
  display: none !important;
}

html {
  color-scheme: dark;
  scroll-padding-top: var(--anchor-offset);
}

@media (min-width: 860px) {
  :root {
    --anchor-offset: 6rem;
  }
}

@media (min-width: 1100px) {  
  :root {
    --anchor-offset: 3.5rem;
  }
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
  background: radial-gradient(900px 500px at 20% 0%, rgba(124, 92, 255, 0.22), transparent 55%),
    radial-gradient(850px 550px at 90% 15%, rgba(33, 212, 253, 0.18), transparent 55%),
    var(--bg);
  color: var(--text);
}

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

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

a:hover {
  text-decoration: underline;
  text-decoration-color: rgba(124, 92, 255, 0.75);
}

.container {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
  z-index: 999;
}

.skip-link:focus {
  transform: translateY(0);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(11, 18, 32, 0.65);
  border-bottom: 1px solid var(--border);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.brand-badge {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 10px 22px rgba(124, 92, 255, 0.25);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  background: rgba(17, 27, 48, 0.75);
  border-radius: 999px;
}

.search input {
  width: 320px;
  max-width: 36vw;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--text);
}

@media (min-width: 860px) {
  .search {
    display: inline-flex;
  }
}

/* Primary nav */
.primary-nav {
  padding-bottom: 0.9rem;
}

.primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(17, 27, 48, 0.55);
}

.pill-link:hover {
  background: rgba(22, 36, 69, 0.65);
  text-decoration: none;
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: var(--brand-2);
}

/* Breadcrumbs */
.breadcrumbs {
  padding: 1rem 0 0.25rem;
  color: var(--muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumbs li + li::before {
  content: ">";
  color: rgba(232, 238, 252, 0.35);
  margin-right: 0.45rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(17, 27, 48, 0.75);
  color: var(--text);
  cursor: pointer;
}

.btn:hover {
  background: rgba(22, 36, 69, 0.85);
}

.btn-primary {
  border: 0;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #061023;
  font-weight: 700;
}

.btn-primary:hover {
  filter: brightness(1.05);
}

.btn-danger {
  border-color: rgba(255, 77, 109, 0.35);
  background: rgba(255, 77, 109, 0.12);
}

/* Cart (hover + click) */
.cart {
  position: relative;
}

.cart-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.cart-button {
  user-select: none;
}

.cart-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.75rem;
  height: 1.6rem;
  padding-inline: 0.5rem;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.25);
  border: 1px solid rgba(124, 92, 255, 0.4);
  color: var(--text);
  font-size: 0.85rem;
}

.cart-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
  z-index: 70;
}

.cart-panel {
  position: fixed;
  right: 1rem;
  top: 4.25rem;
  width: min(420px, calc(100% - 2rem));
  max-height: calc(100vh - 6rem);
  overflow: auto;
  background: rgba(17, 27, 48, 0.96);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 80;
}

.cart-panel header {
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.cart-panel h2 {
  font-size: 1rem;
  margin: 0;
}

.cart-panel .cart-body {
  padding: 0.9rem 1rem;
}

.cart-items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.cart-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(22, 36, 69, 0.55);
  padding: 0.75rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
}

.cart-item small {
  color: var(--muted);
}

.qty {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.qty input {
  width: 4.2rem;
  padding: 0.45rem 0.55rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.75);
  color: var(--text);
}

.cart-footer {
  padding: 0.95rem 1rem 1.05rem;
  border-top: 1px solid var(--border);
  display: grid;
  gap: 0.65rem;
}

.cart-footer p {
  margin: 0;
}

.cart-total {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--muted);
}

.cart-total strong {
  color: var(--text);
}

/* Hover behavior (desktop) */
.cart:hover .cart-panel,
.cart:hover .cart-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.cart:hover .cart-panel {
  transform: translateY(0);
}

/* Click-to-toggle behavior (mobile & optional desktop) */
.cart-toggle:checked ~ .cart-backdrop,
.cart-toggle:checked ~ .cart-panel {
  opacity: 1;
  pointer-events: auto;
}

.cart-toggle:checked ~ .cart-panel {
  transform: translateY(0);
}

@media (hover: none) {
  .cart:hover .cart-panel,
  .cart:hover .cart-backdrop {
    opacity: 0;
    pointer-events: none;
  }
}

/* Main content */
.hero {
  padding: 1.2rem 0 0.25rem;
}

.hero h1 {
  margin: 0.2rem 0 0.35rem;
  font-size: clamp(1.55rem, 2.8vw, 2.25rem);
  letter-spacing: -0.02em;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
}

.section {
  padding: 1rem 0 2rem;
  scroll-margin-top: var(--anchor-offset);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 1.2rem 0 0.75rem;
}

.section-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.section-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Tableless product list (flex/grid) */
.product-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}

.product-card {
  grid-column: span 12;
  border: 1px solid var(--border);
  background: rgba(17, 27, 48, 0.62);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
}

.product-card .media {
  background: rgba(22, 36, 69, 0.8);
}

.product-card .media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.product-card .content {
  padding: 0.9rem 1rem 1rem;
  display: grid;
  gap: 0.6rem;
}

.product-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.price {
  font-weight: 800;
}

.price-actions {
  display: inline-flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.muted {
  color: var(--muted);
}

.tight {
  margin: 0;
}

@media (min-width: 680px) {
  .product-card {
    grid-column: span 6;
  }
}

@media (min-width: 980px) {
  .product-card {
    grid-column: span 4;
  }
}

/* Product page */
.product-layout {
  display: grid;
  gap: 1rem;
  padding: 0.75rem 0 2.5rem;
}

.product-gallery {
  border: 1px solid var(--border);
  background: rgba(17, 27, 48, 0.62);
  border-radius: var(--radius);
  overflow: hidden;
}

/* Part 7 extension: Swiper slider */
.swiper {
  width: 100%;
}

.swiper .swiper-slide img {
  width: 100%;
  height: auto;
}

.swiper .swiper-button-prev,
.swiper .swiper-button-next {
  color: var(--text);
}

.swiper .swiper-pagination-bullet {
  background: rgba(232, 238, 252, 0.55);
}

.swiper .swiper-pagination-bullet-active {
  background: var(--brand-2);
}

.product-details {
  border: 1px solid var(--border);
  background: rgba(17, 27, 48, 0.62);
  border-radius: var(--radius);
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
}

.product-details h1 {
  margin: 0;
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  color: var(--muted);
}

.chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.6rem;
  background: rgba(22, 36, 69, 0.55);
}

@media (min-width: 920px) {
  .product-layout {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: start;
  }
}

/* Forms */
.field {
  display: grid;
  gap: 0.35rem;
}

.field label {
  color: var(--muted);
  font-size: 0.95rem;
}

.field input,
.field select,
.field textarea {
  padding: 0.65rem 0.7rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.75);
  color: var(--text);
  outline: none;
}

.field textarea {
  min-height: 110px;
  resize: vertical;
}

.section-filter {
  margin-bottom: 1rem;
  max-width: 360px;
}

.category-group + .category-group {
  margin-top: 1.5rem;
}

.admin-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(12, 1fr);
}

.admin-grid > .product-details {
  grid-column: span 12;
}

@media (min-width: 980px) {
  .admin-grid > .product-details {
    grid-column: span 4;
  }
}

.status-error {
  color: var(--danger);
}

.upload-file-list {
  margin: 0.35rem 0 0;
  padding-left: 1rem;
  color: var(--muted);
}

.upload-file-list li {
  margin: 0.1rem 0;
}

.admin-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.5rem;
}

.admin-image-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.75);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.65);
}

.footer-inner {
  padding: 1.25rem 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--muted);
}

.footer-inner a {
  color: var(--text);
}