:root {
  --black: #111111;
  --gray: #777777;
  --line: #eaeaea;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: #ffffff;
  color: var(--black);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  animation: fadeIn 0.5s ease;
}

img {
  -webkit-user-drag: none;
  user-drag: none;
  pointer-events: none;
}

a, button {
  pointer-events: auto;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== Hero marquee strip ===== */
.hero {
  width: 100%;
  height: 40px;
  background: var(--black);
  color: #fff;
  overflow: hidden;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.marquee {
  display: flex;
  width: max-content;
  animation: scroll 22s linear infinite;
}

.marquee span {
  padding: 0 2rem;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 500;
}

@keyframes scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== Header ===== */
header {
  position: relative;
  text-align: center;
  padding: 3rem 1rem 2rem;
}

.logo-link {
  text-decoration: none;
  color: var(--black);
}

header h1 {
  font-size: 1.8rem;
  letter-spacing: 0.3em;
  font-weight: 600;
  margin: 0;
}

header p {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--gray);
  letter-spacing: 0.05em;
}

nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
  position: relative;
}

nav a, .nav-filter {
  color: var(--black);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
  transition: color 0.2s ease;
}

nav a:hover, .nav-filter:hover, .nav-filter.active {
  color: var(--gray);
}

.cart-toggle {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  color: var(--black);
}

.cart-toggle svg {
  width: 20px;
  height: 20px;
  transition: transform 0.2s ease;
}

.cart-toggle:hover svg {
  transform: scale(1.1);
}

.cart-badge {
  position: absolute;
  top: -6px;
  right: -8px;
  background: var(--black);
  color: #fff;
  font-size: 0.62rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  display: none;
}

/* ===== Product grid ===== */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.4rem 1.6rem;
}

.item {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  opacity: 0;
  animation: cardIn 0.6s ease forwards;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.photo {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  background: #f7f7f7;
  overflow: hidden;
  margin-bottom: 0.9rem;
}

.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
}

.item:hover .photo img {
  transform: scale(1.045);
}

.add-btn {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--black);
  border: 1px solid var(--black);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.65rem 0;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease, background 0.2s ease, color 0.2s ease;
  pointer-events: auto;
}

.item:hover .add-btn {
  opacity: 1;
  transform: translateY(0);
}

.add-btn:hover {
  background: var(--black);
  color: #fff;
}

.tag {
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: #fff;
  padding: 0.25rem 0.5rem;
  color: var(--gray);
}

.category {
  font-size: 0.68rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.2rem;
}

.name {
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.price {
  font-size: 0.85rem;
  color: var(--gray);
}

footer {
  text-align: center;
  padding: 2.5rem 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  color: var(--gray);
  letter-spacing: 0.05em;
}

/* ===== Cart drawer ===== */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 40;
}

.cart-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.cart-drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: 380px;
  max-width: 90vw;
  background: #fff;
  z-index: 50;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.06);
}

.cart-drawer.open {
  transform: translateX(0);
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.cart-header h2 {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: 0;
}

.cart-close {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  line-height: 1;
  color: var(--black);
}

#cart-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.5rem;
}

.cart-empty {
  color: var(--gray);
  font-size: 0.85rem;
  text-align: center;
  margin-top: 2rem;
}

.cart-item {
  display: flex;
  gap: 0.9rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.cart-item img {
  width: 64px;
  height: 80px;
  object-fit: cover;
  background: #f7f7f7;
  flex-shrink: 0;
}

.cart-item-info {
  flex: 1;
}

.cart-item-name {
  font-size: 0.82rem;
  font-weight: 500;
}

.cart-item-meta {
  font-size: 0.72rem;
  color: var(--gray);
  margin: 0.2rem 0 0.5rem;
}

.cart-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.qty-control {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
}

.qty-control button {
  width: 22px;
  height: 22px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.9rem;
}

.qty-control span {
  min-width: 20px;
  text-align: center;
  font-size: 0.78rem;
}

.cart-item-price {
  font-size: 0.78rem;
}

.cart-item-remove {
  position: absolute;
  top: 1rem;
  right: 0;
  background: none;
  border: none;
  color: var(--gray);
  font-size: 1rem;
  cursor: pointer;
  line-height: 1;
}

.cart-item-remove:hover {
  color: var(--black);
}

#cart-footer {
  padding: 1.2rem 1.5rem 1.6rem;
  border-top: 1px solid var(--line);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.checkout-btn {
  width: 100%;
  background: var(--black);
  color: #fff;
  border: none;
  padding: 0.9rem 0;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.checkout-btn:hover {
  opacity: 0.85;
}

/* ===== Product detail page ===== */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.6rem 1.5rem 0;
  font-size: 0.75rem;
  color: var(--gray);
}

.breadcrumb a {
  color: var(--gray);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--black);
}

.product-layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
}

.gallery-main {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: #f7f7f7;
  overflow: hidden;
  margin-bottom: 0.8rem;
}

.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: crossfade 0.4s ease;
}

@keyframes crossfade {
  from { opacity: 0.3; }
  to { opacity: 1; }
}

.gallery-thumbs {
  display: flex;
  gap: 0.7rem;
}

.gallery-thumbs button {
  width: 64px;
  aspect-ratio: 3 / 4;
  padding: 0;
  border: 1px solid transparent;
  background: #f7f7f7;
  cursor: pointer;
  overflow: hidden;
}

.gallery-thumbs button.active {
  border-color: var(--black);
}

.gallery-thumbs img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-info {
  padding-top: 0.5rem;
}

.product-category {
  font-size: 0.72rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.6rem;
}

.product-info h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  letter-spacing: 0.01em;
}

.product-price {
  font-size: 1.05rem;
  color: var(--black);
  margin-bottom: 1.6rem;
}

.product-desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: #444;
  margin-bottom: 2rem;
}

.section-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray);
  margin-bottom: 0.7rem;
}

.color-swatches {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.color-swatch {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  cursor: pointer;
  position: relative;
  transition: transform 0.15s ease;
}

.color-swatch:hover {
  transform: scale(1.08);
}

.color-swatch.active::after {
  content: "";
  position: absolute;
  inset: -4px;
  border: 1px solid var(--black);
  border-radius: 50%;
}

.size-options {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.size-option {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.size-option:hover {
  border-color: var(--black);
}

.size-option.selected {
  background: var(--black);
  border-color: var(--black);
  color: #fff;
}

.add-to-cart-btn {
  width: 100%;
  background: var(--black);
  color: #fff;
  border: none;
  padding: 1rem 0;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.15s ease;
  margin-bottom: 0.9rem;
}

.add-to-cart-btn:hover {
  opacity: 0.88;
}

.add-to-cart-btn:active {
  transform: scale(0.98);
}

.add-to-cart-btn.added {
  background: #2f8f4e;
}

.size-warning {
  font-size: 0.72rem;
  color: #c0392b;
  height: 1rem;
  margin-bottom: 0.5rem;
}

.related-title {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray);
  margin-bottom: 1.5rem;
}

.related-grid {
  max-width: 1100px;
  margin: 0 auto 5rem;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.6rem;
}

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
  .product-layout { grid-template-columns: 1fr; gap: 2rem; }
  .related-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .grid { grid-template-columns: repeat(2, 1fr); gap: 1.6rem 1rem; }
  header h1 { font-size: 1.4rem; letter-spacing: 0.2em; }
  nav { gap: 1.2rem; flex-wrap: wrap; }
  .cart-toggle { position: static; margin-top: 0.8rem; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}