:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e2e5ea;
  --border-strong: #cdd2da;
  --ink: #14181f;
  --muted: #5b6470;
  --muted-2: #828b97;
  --accent: #1f4ed8;
  --accent-hover: #1a42b8;
  --accent-soft: #eaf0fe;
  --ring: rgba(31, 78, 216, 0.28);
  --radius: 10px;
  --radius-sm: 7px;
  --maxw: 1140px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Notice bar */
.notice {
  background: var(--ink);
  color: #f3f4f6;
  font-size: 13px;
  text-align: center;
  padding: 8px 24px;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand .mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.5px;
}
.brand .name {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.3px;
}
.brand .name span {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--muted-2);
  letter-spacing: 0.2px;
}
.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  margin-right: 8px;
}
.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--ink); text-decoration: none; }

.cart-btn {
  position: relative;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: border-color .15s, background .15s;
}
.cart-btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.cart-count {
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  display: grid;
  place-items: center;
}

/* Hero */
.hero {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 72px 24px;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(30px, 4.5vw, 46px);
  line-height: 1.08;
  letter-spacing: -1px;
  margin: 0 0 18px;
}
.hero p {
  color: var(--muted);
  font-size: 17px;
  max-width: 520px;
  margin: 0 0 28px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 22px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .15s, border-color .15s, color .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); text-decoration: none; }
.btn-ghost { background: var(--surface); border-color: var(--border-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.hero-panel {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.spec-row:last-child { border-bottom: none; }
.spec-row .k { color: var(--muted); }
.spec-row .v { font-weight: 600; font-family: var(--mono); font-size: 13px; }

/* Trust strip */
.trust {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.trust-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 28px 24px;
}
.trust-item .t { font-size: 14px; font-weight: 600; }
.trust-item .d { font-size: 13px; color: var(--muted); margin-top: 2px; }

/* Catalog */
.catalog { padding: 56px 0 72px; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
  gap: 16px;
  flex-wrap: wrap;
}
.section-head h2 { font-size: 24px; letter-spacing: -0.5px; margin: 0 0 4px; }
.section-head p { color: var(--muted); font-size: 14px; margin: 0; }

.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.filter {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: all .15s;
}
.filter:hover { border-color: var(--accent); color: var(--accent); }
.filter.active { background: var(--ink); border-color: var(--ink); color: #fff; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(264px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 8px 24px rgba(20, 24, 31, 0.07);
  transform: translateY(-2px);
}
.thumb {
  aspect-ratio: 16 / 10;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 0 18px;
  position: relative;
  overflow: hidden;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.conn {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  text-align: center;
  min-width: 64px;
  line-height: 1.2;
}
.arrow {
  color: var(--accent);
  font-weight: 700;
  font-size: 18px;
  font-family: var(--mono);
}
.card .body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.card .meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted-2);
}
.sku { font-family: var(--mono); }
.stars { color: var(--accent); font-weight: 600; letter-spacing: 1px; }
.stars .reviews { color: var(--muted-2); font-weight: 400; letter-spacing: 0; margin-left: 4px; }
.card h3 { margin: 0; font-size: 16px; letter-spacing: -0.2px; }
.card .desc { color: var(--muted); font-size: 13.5px; flex: 1; }
.card .foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.price { font-weight: 700; font-size: 18px; }
.price small {
  color: var(--muted-2);
  font-weight: 500;
  font-size: 12px;
  text-decoration: line-through;
  margin-left: 6px;
}
.add-btn {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13.5px;
  transition: background .15s;
}
.add-btn:hover { background: var(--accent-hover); }
.add-btn:active { transform: scale(0.97); }

/* Cart drawer */
.overlay {
  position: fixed; inset: 0;
  background: rgba(20, 24, 31, 0.5);
  opacity: 0; pointer-events: none;
  transition: opacity .2s;
  z-index: 50;
}
.overlay.open { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: 0;
  height: 100%; width: 420px; max-width: 94vw;
  background: var(--surface);
  border-left: 1px solid var(--border);
  transform: translateX(100%);
  transition: transform .25s ease;
  z-index: 60;
  display: flex;
  flex-direction: column;
}
.drawer.open { transform: translateX(0); }
.drawer-head {
  padding: 20px 22px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.drawer-head h2 { margin: 0; font-size: 17px; }
.icon-btn {
  background: none; border: none; color: var(--muted);
  font-size: 24px; cursor: pointer; line-height: 1; padding: 0 4px;
}
.icon-btn:hover { color: var(--ink); }
.cart-items { flex: 1; overflow-y: auto; padding: 8px 22px; }
.cart-empty { color: var(--muted); text-align: center; padding: 48px 0; font-size: 14px; }
.cart-row {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.cart-row .tile {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--accent);
  flex-shrink: 0;
  overflow: hidden;
}
.cart-row .tile img { width: 100%; height: 100%; object-fit: cover; }
.cart-row .info { flex: 1; min-width: 0; }
.cart-row .info strong { font-size: 14px; display: block; }
.cart-row .info .unit { font-size: 12px; color: var(--muted); }
.qty { display: inline-flex; align-items: center; gap: 0; margin-top: 8px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); overflow: hidden; }
.qty button {
  width: 28px; height: 28px;
  border: none; background: var(--surface-2);
  color: var(--ink); cursor: pointer; font-weight: 700; font-size: 15px;
}
.qty button:hover { background: var(--border); }
.qty span { font-size: 13px; min-width: 32px; text-align: center; }
.line-total { font-weight: 700; font-size: 14px; white-space: nowrap; }
.drawer-foot {
  padding: 20px 22px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.total-row {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 14px; color: var(--muted); margin-bottom: 4px;
}
.total-row.grand { color: var(--ink); margin: 10px 0 16px; }
.total-row.grand strong { font-size: 20px; }
.checkout-btn {
  width: 100%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  cursor: pointer;
  transition: background .15s;
}
.checkout-btn:hover { background: var(--accent-hover); }
.checkout-btn:disabled { background: var(--border-strong); color: var(--muted-2); cursor: not-allowed; }

/* Modal */
.modal-wrap {
  position: fixed; inset: 0;
  display: grid; place-items: center;
  background: rgba(20, 24, 31, 0.6);
  opacity: 0; pointer-events: none;
  transition: opacity .2s;
  z-index: 70;
  padding: 20px;
}
.modal-wrap.open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: 480px; max-width: 100%;
  max-height: 92vh; overflow-y: auto;
  padding: 30px;
  box-shadow: 0 24px 60px rgba(20, 24, 31, 0.25);
}
.modal h2 { margin: 0 0 4px; font-size: 22px; letter-spacing: -0.4px; }
.modal .sub { color: var(--muted); font-size: 14px; margin: 0 0 22px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--ink); }
.field input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  color: var(--ink);
  font-size: 14px;
  font-family: var(--font);
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--ring); }
.row2 { display: flex; gap: 14px; }
.row2 .field { flex: 1; }
.pay-btn {
  width: 100%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  cursor: pointer;
  margin-top: 6px;
  transition: background .15s;
}
.pay-btn:hover { background: var(--accent-hover); }
.pay-note { font-size: 12px; color: var(--muted); text-align: center; margin-top: 14px; }

.success { text-align: center; padding: 8px 0; }
.success .check {
  width: 64px; height: 64px; margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  display: grid; place-items: center;
  color: var(--accent); font-size: 30px; font-weight: 700;
}
.success h2 { font-size: 22px; }
.success p { color: var(--muted); font-size: 14px; }
.order-id {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: var(--mono);
  margin: 18px 0;
  font-size: 14px;
}

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: var(--ink);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  opacity: 0; pointer-events: none;
  transition: opacity .2s, transform .2s;
  z-index: 80;
  box-shadow: 0 12px 32px rgba(20, 24, 31, 0.25);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 48px 0 32px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}
.foot-grid h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--muted-2); margin: 0 0 14px; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li { margin-bottom: 9px; }
.foot-grid a { color: var(--muted); font-size: 14px; }
.foot-grid a:hover { color: var(--ink); text-decoration: none; }
.foot-about p { color: var(--muted); font-size: 14px; margin: 12px 0 0; max-width: 320px; }
.foot-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted-2);
  font-size: 13px;
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; padding: 48px 24px; }
  .trust-inner { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 560px) {
  .trust-inner { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
}
