:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #52606d;
  --accent: #1d4ed8;
  --accent-dark: #1e40af;
  --border: #d9e2ec;
  --success: #047857;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav .logo {
  font-weight: 700;
  font-size: 1.1rem;
}

nav a {
  text-decoration: none;
  color: var(--text);
  margin-right: 16px;
}

nav a:last-child {
  margin-right: 0;
}

nav .cart-pill {
  background: var(--accent);
  color: white;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
}

main {
  padding: 0;
}

.product-page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: grid;
  grid-template-columns: 1fr 1.5fr 280px;
  gap: 32px;
  align-items: start;
}

.product-image {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 20px;
  text-align: center;
}

.product-image img {
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.product-image-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.product-description {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 20px;
  font-style: italic;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}

.product-details {
  grid-column: 2;
}

.color-selector {
  display: flex;
  gap: 12px;
  margin: 12px 0;
}

.color-option {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.color-option:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.color-option.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px white, 0 0 0 4px var(--accent);
}

.selected-color {
  margin: 12px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.category-page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: grid;
  grid-template-columns: 1fr 1.5fr 280px;
  gap: 32px;
  align-items: start;
}

.category-content {
  grid-column: 2;
}

.category-content h1 {
  margin-top: 0;
  font-size: 2rem;
}

.category-content .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.banner-image {
  width: 100%;
  aspect-ratio: 16 / 4;
  overflow: hidden;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner-image img {
  width: 60%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero-wrapper {
  width: 60%;
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: grid;
  grid-template-columns: 4fr 1fr;
  gap: 32px;
  align-items: start;
}

.hero-content {
  grid-column: 1;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero-card {
  background: var(--card);
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.hero-card h1 {
  margin-top: 0;
  font-size: 2rem;
}

.hero-card p {
  color: var(--muted);
}

.categories-sidebar {
  background: var(--card);
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  position: sticky;
  top: 80px;
}

.categories-sidebar h2 {
  margin-top: 0;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.categories-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.category-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.category-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.section-title {
  margin: 0 0 20px 0;
  font-size: 1.4rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card h3,
.card h2 {
  margin: 0;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.tag {
  background: #e0f2fe;
  color: #0369a1;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  width: fit-content;
}

.price {
  font-size: 1.2rem;
  font-weight: 700;
}

.button {
  border: none;
  background: var(--accent);
  color: white;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.button:hover {
  background: var(--accent-dark);
}

.button.secondary:hover {
  background: #e0e7ff;
}

.button.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.list-item {
  background: var(--card);
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.table th,
.table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.table th {
  background: #f1f5f9;
}

.table tfoot td {
  font-weight: 700;
}

.form {
  background: var(--card);
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  display: grid;
  gap: 16px;
}

.form label {
  font-weight: 600;
}

.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-family: inherit;
}

.selector-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

.selector-group label {
  font-weight: 600;
  color: var(--text);
}

.product-selector-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 1rem;
}

.product-selector-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.1);
}

.price-container {
  margin: 16px 0;
  padding: 12px;
  background: #f9fafb;
  border-radius: 10px;
}

.price-container div {
  margin: 4px 0;
}

.notice {
  background: #ecfdf3;
  border: 1px solid #a7f3d0;
  color: var(--success);
  padding: 12px 16px;
  border-radius: 12px;
}

footer {
  text-align: center;
  color: var(--muted);
  padding: 32px 16px 48px;
}

.small {
  font-size: 0.9rem;
  color: var(--muted);
}

.hidden {
  display: none;
}