/* ==========================================================
   SHOP CATALOG — CSS3 thuần, không framework, mobile-first.
   Dùng system font stack để giữ website thật sự nhẹ, không tải
   font ngoài, không CDN.
   ========================================================== */

:root {
  --color-primary: #1f6f5c;
  --color-secondary: #e7a94a;
  --color-ink: #16211c;
  --color-paper: #faf8f4;
  --color-surface: #ffffff;
  --color-muted: #6b7280;
  --color-border: #e6e2d8;
  --color-danger: #c14a3c;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-card: 0 1px 2px rgba(22, 33, 28, 0.06), 0 8px 24px -12px rgba(22, 33, 28, 0.18);
  --shadow-pop: 0 12px 32px -8px rgba(22, 33, 28, 0.28);

  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font-family: inherit;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: 16px; /* tránh iOS auto-zoom khi focus */
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------------- Site header ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.site-header__brand img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.site-header__brand span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 0 7px;
  background: var(--color-ink);
  border-radius: 2px;
}

.category-nav {
  display: none;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.category-nav.is-open {
  display: flex;
}

.category-nav a {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.95rem;
}

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

@media (min-width: 800px) {
  .menu-toggle {
    display: none;
  }
  .category-nav {
    display: flex !important;
    flex-direction: row;
    border-top: none;
    gap: 4px;
  }
  .category-nav a {
    border-bottom: none;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
  }
  .category-nav a:hover {
    background: var(--color-paper);
  }
}

/* ---------------- Banner ---------------- */
.banner {
  background: linear-gradient(135deg, var(--color-primary), color-mix(in srgb, var(--color-primary) 70%, black));
  color: #fff;
  padding: 40px 16px;
}

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

.banner__eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.16);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.banner__title {
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.banner__desc {
  max-width: 60ch;
  opacity: 0.92;
  margin: 0;
}

/* ---------------- Category pills (home) ---------------- */
.section {
  padding: 32px 16px;
}

.section__title {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.category-pill {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
}

.category-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------------- Product grid & cards ---------------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (min-width: 640px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
}

@media (min-width: 1000px) {
  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.product-card__image {
  position: relative;
  aspect-ratio: 1 / 1;
  background: var(--color-paper);
}

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

.product-card__badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--color-secondary);
  color: var(--color-ink);
  font-size: 0.7rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 999px;
}

.product-card__body {
  padding: 10px 12px 14px;
}

.product-card__name {
  font-size: 0.92rem;
  font-weight: 600;
  margin: 0 0 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.6em;
}

.product-card__price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}

.price-sale {
  font-weight: 800;
  color: var(--color-primary);
}

.price-sale--lg {
  font-size: 1.6rem;
}

.price-original {
  font-size: 0.8rem;
  color: var(--color-muted);
  text-decoration: line-through;
}

.price-original--lg {
  font-size: 1rem;
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--color-muted);
  padding: 40px 12px;
}

/* ---------------- Products page layout ---------------- */
.products-layout {
  display: grid;
  gap: 20px;
  padding: 20px 16px 48px;
  max-width: var(--max-width);
  margin: 0 auto;
}

@media (min-width: 900px) {
  .products-layout {
    grid-template-columns: 240px 1fr;
    align-items: start;
  }
}

.filters {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.filters h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.filter-group {
  padding: 12px 0;
  border-top: 1px solid var(--color-border);
}

.filter-group:first-of-type {
  border-top: none;
}

.filter-group h4 {
  margin: 0 0 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.filter-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
  font-size: 0.9rem;
  cursor: pointer;
}

.filter-empty {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.price-range-inputs {
  display: flex;
  gap: 8px;
  align-items: center;
}

.field {
  margin-bottom: 12px;
}

.field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-muted);
  margin-bottom: 5px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--color-primary);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}

.toolbar input[type="search"],
.toolbar select {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.toolbar input[type="search"] {
  flex: 1 1 200px;
}

.result-count {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

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

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

.btn--ghost {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-ink);
}

.btn--danger {
  background: #fff;
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.btn--sm {
  padding: 6px 12px;
  font-size: 0.82rem;
}

.btn--icon {
  padding: 6px 10px;
  background: none;
  border: 1px solid var(--color-border);
}

.btn--block {
  width: 100%;
}

.btn.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--messenger {
  background: #0084ff;
  color: #fff;
}

/* ---------------- Product detail ---------------- */
.product-detail {
  display: grid;
  gap: 24px;
  padding: 24px 16px 56px;
  max-width: var(--max-width);
  margin: 0 auto;
}

@media (min-width: 860px) {
  .product-detail {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.gallery-main {
  aspect-ratio: 1 / 1;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.gallery-thumbs {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  overflow-x: auto;
}

.gallery-thumb {
  flex: 0 0 auto;
  width: 64px;
  height: 64px;
  padding: 0;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: none;
  cursor: pointer;
}

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

.gallery-thumb.is-active {
  border-color: var(--color-primary);
}

.product-info__category {
  color: var(--color-muted);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 6px;
}

.product-info__name {
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 800;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.product-info__sku {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin: 0 0 14px;
}

.product-info__price {
  margin: 16px 0;
}

.attr-list {
  border-top: 1px solid var(--color-border);
  margin: 18px 0;
}

.attr-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
}

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

.attr-value {
  font-weight: 700;
}

.product-info__description {
  white-space: pre-wrap;
  line-height: 1.7;
  color: var(--color-ink);
}

.buy-messenger-btn {
  margin-top: 20px;
  font-size: 1.05rem;
  padding: 15px 20px;
}

/* ---------------- Footer ---------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-top: 40px;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 16px;
  display: grid;
  gap: 8px;
}

.site-footer__row {
  font-size: 0.88rem;
  color: var(--color-muted);
}

.site-footer__social a {
  font-weight: 700;
  color: var(--color-primary);
}

/* ---------------- Floating messenger button (mobile) ---------------- */
.messenger-float {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 50;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #0084ff;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-pop);
  font-size: 1.4rem;
}

/* ==========================================================
   MANAGE PAGE (/manage/TOKEN)
   ========================================================== */

.manage-gate {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  font-size: 1.1rem;
  color: var(--color-muted);
}

.manage-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 16px 80px;
}

.manage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.manage-header h1 {
  font-size: 1.3rem;
  margin: 0;
}

.manage-section-title {
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  margin: 28px 0 12px;
}

.manage-product-row {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  margin-bottom: 10px;
}

.manage-product-row__image {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-paper);
}

.manage-product-row__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.no-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  color: var(--color-muted);
  text-align: center;
}

.manage-product-row__name {
  font-weight: 700;
  font-size: 0.95rem;
}

.tag-hidden {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
  padding: 1px 6px;
  border-radius: 999px;
  margin-left: 6px;
}

.manage-product-row__price {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9rem;
}

.manage-product-row__actions {
  display: flex;
  gap: 6px;
}

.category-manage-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  margin-bottom: 8px;
}

.category-add-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.category-add-row input {
  flex: 1;
}

.form-section {
  margin-top: 24px;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.form-section h2 {
  margin: 0 0 16px;
  font-size: 1.1rem;
}

.image-picker {
  margin-bottom: 16px;
}

.image-previews {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.image-preview-thumb {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.image-preview-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-preview-thumb button {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: none;
  background: rgba(22, 33, 28, 0.75);
  color: #fff;
  font-size: 0.7rem;
  cursor: pointer;
  line-height: 1;
}

.attribute-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  align-items: end;
  margin-bottom: 10px;
}

.attribute-row__field label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.attribute-row__field input {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0;
  font-size: 0.9rem;
}

.form-error {
  color: var(--color-danger);
  font-size: 0.88rem;
  min-height: 1.2em;
  margin: 10px 0;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.is-hidden {
  display: none !important;
}

.product-not-found {
  padding: 60px 16px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}