:root {
  --ink: #1f2933;
  --muted: #5d6b78;
  --line: #d9e2ea;
  --paper: #ffffff;
  --soft: #f5f7fa;
  --yellow: #ffd43b;
  --yellow-strong: #f7b801;
  --green: #1f9d55;
  --blue: #1967d2;
  --red: #c2410c;
  --shadow: 0 10px 28px rgba(31, 41, 51, 0.10);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--soft);
  line-height: 1.55;
}

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

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 190px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: #17130a;
  background: linear-gradient(135deg, var(--yellow), var(--yellow-strong));
  font-weight: 900;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.12);
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.search {
  display: flex;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--paper);
}

.search input,
.search button,
.checkout-form input,
.checkout-form textarea,
.checkout-form select,
.buy-box input,
.status-form select {
  font: inherit;
}

.search input {
  width: 100%;
  min-width: 0;
  border: 0;
  padding: 12px 14px;
}

.search button,
.status-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  padding: 0 16px;
  background: var(--yellow);
  color: #2d2100;
  font-weight: 800;
  cursor: pointer;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.top-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.icon {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cart-count {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  padding: 0 7px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
}

.category-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 10px clamp(16px, 4vw, 48px);
  background: #fff9df;
  border-bottom: 1px solid #f0da88;
}

.category-strip a {
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid #ebcf69;
  border-radius: 999px;
  background: #fff;
  font-size: 14px;
  font-weight: 700;
}

main {
  min-height: 62vh;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
  gap: clamp(20px, 4vw, 56px);
  align-items: center;
  padding: clamp(34px, 7vw, 76px) clamp(16px, 4vw, 48px);
  background:
    linear-gradient(120deg, rgba(255, 212, 59, 0.92), rgba(255, 249, 223, 0.92)),
    url("/assets/board-esp32.svg") right 6vw center / min(42vw, 520px) no-repeat;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 8px;
  color: #705300;
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0;
}

.lead,
.hero-copy p {
  color: #3f4a54;
  font-size: 18px;
  max-width: 760px;
}

.hero-actions,
.section-heading,
.price-row,
.site-footer,
.summary-box dl div,
.order-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
  cursor: pointer;
}

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

.button.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.hero-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid #f0da88;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-panel div {
  display: grid;
  grid-template-columns: 32px minmax(96px, auto) 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid var(--line);
}

.hero-panel div:last-child {
  border-bottom: 0;
}

.hero-panel strong {
  font-size: 26px;
  white-space: nowrap;
}

.hero-panel span {
  color: var(--muted);
}

.trust-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.trust-band p {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  padding: 18px clamp(16px, 4vw, 48px);
  background: #fff;
}

.trust-band .icon {
  color: #705300;
  margin-top: 2px;
}

.trust-section {
  background: #fff;
}

.trust-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 16px;
  align-items: stretch;
}

.trust-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.trust-stat,
.marketplace-proof,
.activity-panel,
.review-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(31, 41, 51, 0.06);
}

.trust-stat {
  display: grid;
  gap: 8px;
  min-height: 150px;
  padding: 18px;
  background: linear-gradient(180deg, #fffdf2, #ffffff);
}

.trust-stat-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: #fff4bf;
  color: #705300;
}

.trust-stat strong {
  color: #17130a;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1;
  white-space: nowrap;
}

.trust-stat span:last-child {
  color: var(--muted);
  font-weight: 800;
}

.marketplace-proof {
  grid-column: 1 / -1;
  display: grid;
  gap: 12px;
  padding: 18px;
}

.marketplace-proof h3,
.activity-panel h3 {
  margin: 0;
  font-size: 20px;
}

.marketplace-proof p,
.activity-panel p {
  margin: 0;
  color: var(--muted);
}

.marketplace-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.marketplace-logos img {
  width: auto;
  height: 48px;
  max-width: 190px;
  padding: 9px 12px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
  object-fit: contain;
}

.activity-panel {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 18px;
  background: #f8fbff;
}

.activity-panel h3,
.trust-photo-card figcaption,
.rating,
.shipping {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.activity-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.activity-list li {
  display: grid;
  grid-template-columns: 82px 88px 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.activity-list li:last-child {
  border-bottom: 0;
}

.activity-list li.is-new {
  animation: order-flash 1.8s ease-out;
}

.activity-list span {
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.activity-list strong {
  font-size: 14px;
}

.review-section {
  background: #f5f7fa;
}

.photo-section {
  padding-top: 0;
  background: #fff;
}

.trust-photo-card {
  display: grid;
  gap: 10px;
  margin: 0;
}

.trust-photo-card img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.trust-photo-card figcaption {
  color: var(--muted);
  font-weight: 800;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.review-card {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 18px;
}

.rating {
  width: fit-content;
  padding: 6px 10px;
  border-radius: 999px;
  background: #eaf7ef;
  color: #16663a;
  font-weight: 900;
}

.review-card blockquote {
  margin: 0;
  color: #34404b;
}

.review-card figcaption {
  color: var(--muted);
  font-weight: 900;
}

@keyframes order-flash {
  0% {
    background: #fff4bf;
    transform: translateY(-4px);
  }
  100% {
    background: transparent;
    transform: translateY(0);
  }
}

.section {
  padding: clamp(28px, 5vw, 54px) clamp(16px, 4vw, 48px);
}

.section.narrow {
  max-width: 920px;
  margin: 0 auto;
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading a {
  color: var(--blue);
  font-weight: 800;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.product-card,
.category-card,
.summary-box,
.cart-item,
.detail-media,
.admin-table-wrap {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(31, 41, 51, 0.06);
}

.product-card {
  display: grid;
  overflow: hidden;
}

.product-media {
  display: grid;
  place-items: center;
  min-height: 190px;
  background: linear-gradient(180deg, #fff9df, #edf6ff);
}

.product-media img {
  width: 82%;
  max-height: 180px;
  object-fit: contain;
}

.product-card-body {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.product-card h2 {
  font-size: 18px;
}

.product-card p,
.stock-line,
.shipping,
.warranty {
  margin: 0;
  color: var(--muted);
}

.price-row strong,
.detail-price {
  color: #17130a;
  font-size: 24px;
}

.price-row span,
.shipping {
  color: var(--green);
  font-weight: 800;
}

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

.badges span {
  padding: 5px 9px;
  border-radius: 999px;
  background: #eaf7ef;
  color: #16663a;
  font-size: 12px;
  font-weight: 800;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.category-card {
  display: grid;
  gap: 8px;
  padding: 18px;
}

.category-card strong {
  font-size: 20px;
}

.category-card span {
  color: var(--muted);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px clamp(16px, 4vw, 48px) 0;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs a {
  color: var(--blue);
  font-weight: 800;
}

.product-detail {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(22px, 4vw, 48px);
  align-items: start;
  padding: clamp(24px, 5vw, 54px) clamp(16px, 4vw, 48px);
}

.detail-media {
  display: grid;
  place-items: center;
  padding: clamp(20px, 5vw, 48px);
  background: linear-gradient(180deg, #fff9df, #eaf3ff);
}

.detail-copy {
  display: grid;
  gap: 14px;
}

.buy-box {
  display: grid;
  grid-template-columns: 110px 120px minmax(160px, 220px);
  gap: 10px;
  align-items: end;
  padding: 14px;
  background: #fff9df;
  border: 1px solid #f0da88;
  border-radius: 8px;
}

.buy-box label,
.checkout-form label {
  display: grid;
  gap: 6px;
  color: var(--ink);
  font-weight: 800;
}

.buy-box input,
.checkout-form input,
.checkout-form textarea,
.checkout-form select,
.status-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 11px 12px;
}

.spec-list {
  display: grid;
  gap: 10px;
  padding-left: 20px;
}

.cart-form,
.checkout-form {
  display: grid;
  gap: 14px;
}

.cart-item {
  display: grid;
  grid-template-columns: 96px 1fr 100px 120px;
  gap: 14px;
  align-items: center;
  padding: 14px;
}

.cart-item h2 {
  font-size: 17px;
}

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

.summary-box {
  display: grid;
  gap: 12px;
  margin-top: 16px;
  padding: 16px;
}

.summary-box dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

.summary-box dt,
.summary-box dd {
  margin: 0;
}

.summary-box dd {
  font-weight: 900;
}

.checkout-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 380px);
  gap: 24px;
  align-items: start;
}

.checkout-form textarea {
  min-height: 96px;
  resize: vertical;
}

.order-line {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.admin-table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: #fff;
}

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

.status-form {
  display: flex;
  gap: 8px;
}

.status-form button {
  min-height: 42px;
  border-radius: 8px;
}

.error {
  color: var(--red);
  font-weight: 800;
}

.empty {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.site-footer {
  align-items: start;
  padding: 28px clamp(16px, 4vw, 48px);
  background: #1f2933;
  color: #fff;
}

.site-footer p {
  max-width: 680px;
  margin: 8px 0 0;
  color: #d9e2ea;
}

.site-footer section:last-child {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-weight: 800;
}

@media (max-width: 820px) {
  .site-header {
    position: static;
    grid-template-columns: 1fr;
  }

  .top-nav {
    justify-content: space-between;
  }

  .hero,
  .product-detail,
  .checkout-layout,
  .trust-layout,
  .trust-stats,
  .review-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    background:
      linear-gradient(120deg, rgba(255, 212, 59, 0.95), rgba(255, 249, 223, 0.95)),
      url("/assets/board-esp32.svg") right -80px bottom -40px / 320px no-repeat;
  }

  .trust-band {
    grid-template-columns: 1fr;
  }

  .buy-box,
  .cart-item {
    grid-template-columns: 1fr;
  }

  .activity-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .cart-item img {
    width: 140px;
  }

  .hero-actions,
  .site-footer,
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }
}