:root {
  --brand-active: var(--brand-light, #0e94a8);
  --brand-deep: var(--brand-deep-light, #155e75);
  --on-brand-active: #ffffff;
  --paper: var(--paper-light, #f5f9fa);
  --surface: var(--surface-light, #ffffff);
  --surface-raised: var(--surface-raised-light, #ffffff);
  --chrome: var(--chrome-light, #edf5f6);
  --ink: var(--ink-light, #10252b);
  --muted: var(--muted-light, #5c7077);
  --line: var(--line-light, #d5e5e8);
  --success: #147a52;
  --warning: #9a5a00;
  --danger: #b23b3b;
  --shadow: 0 18px 50px rgba(24, 40, 51, 0.08);
  --shell: min(1180px, calc(100% - 32px));
  --font: "Segoe UI", Tahoma, Arial, sans-serif;
}

html[data-theme="dark"] {
  --brand-active: var(--brand-dark, #22b8cb);
  --brand-deep: var(--brand-deep-dark, #0e94a8);
  --paper: var(--paper-dark, #0e141b);
  --surface: var(--surface-dark, #1a222e);
  --surface-raised: var(--surface-raised-dark, #202b38);
  --chrome: var(--chrome-dark, #131a24);
  --ink: var(--ink-dark, #f7fbfc);
  --muted: var(--muted-dark, #9fb1ba);
  --line: var(--line-dark, #30404a);
  --success: #55d6a1;
  --warning: #f3b75f;
  --danger: #ff8a8a;
  --shadow: 0 18px 55px rgba(0, 0, 0, 0.28);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; background: var(--paper); }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--brand-active) 65%, white);
  outline-offset: 3px;
}

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

.skip-link {
  position: fixed;
  inset-block-start: 8px;
  inset-inline-start: 8px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--on-brand-active);
  background: var(--brand-active);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.shell { width: var(--shell); margin-inline: auto; }
.language-form { margin: 0; }
main { min-height: 65vh; }

.button, .button-secondary, .button-quiet {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 720;
  cursor: pointer;
}
.button { color: var(--on-brand-active); background: var(--brand-active); }
.button:hover { background: color-mix(in srgb, var(--brand-active) 84%, black); }
.button:disabled { opacity: 0.52; cursor: not-allowed; }
.button-secondary { color: var(--ink); border-color: var(--line); background: var(--surface); }
.button-quiet { min-height: 38px; padding: 7px 11px; color: var(--brand-active); background: transparent; }
.button-wide { width: 100%; }

.section { padding: 54px 0; }
.section.compact { padding: 36px 0; }
.section-head {
  margin-bottom: 23px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}
.section-head h1, .section-head h2 { margin: 0; font-size: clamp(1.55rem, 3vw, 2.25rem); line-height: 1.2; }
.section-head p { margin: 6px 0 0; color: var(--muted); }
.text-link { color: var(--brand-active); font-weight: 700; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }

.field { display: grid; gap: 7px; }
.field label { font-size: 0.88rem; font-weight: 700; }
.field input, .field textarea, .field select, .search-input {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: var(--surface);
}
.field textarea { min-height: 110px; resize: vertical; }
.field-validation-error, .validation-summary-errors { color: var(--danger); font-size: 0.88rem; }
.validation-summary-errors ul { margin: 0; padding-inline-start: 20px; }

.empty-state, .service-state {
  padding: 58px 24px;
  border: 1px dashed var(--line);
  border-radius: 22px;
  text-align: center;
  background: var(--surface);
}
.empty-state h2, .service-state h1 { margin: 0 0 8px; }
.empty-state p, .service-state p { max-width: 560px; margin: 0 auto 22px; color: var(--muted); }

.availability {
  padding: 5px 9px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 0.76rem;
  font-weight: 760;
}
.availability.in-stock {
  color: var(--success);
  border-color: color-mix(in srgb, var(--success) 32%, transparent);
  background: color-mix(in srgb, var(--success) 11%, var(--surface));
}
.availability.backorder {
  color: var(--warning);
  border-color: color-mix(in srgb, var(--warning) 36%, transparent);
  background: color-mix(in srgb, var(--warning) 12%, var(--surface));
}
.availability.out {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 32%, transparent);
  background: color-mix(in srgb, var(--danger) 10%, var(--surface));
}
.image-fallback {
  display: grid;
  place-items: center;
  color: color-mix(in srgb, var(--brand-active) 74%, var(--ink));
  font-size: 3.8rem;
  font-weight: 800;
  text-transform: uppercase;
}
.product-category { color: color-mix(in srgb, var(--brand-deep) 72%, var(--ink)); font-size: 0.8rem; font-weight: 650; }
.price-row { display: flex; align-items: baseline; gap: 6px; }
.price-row span { color: var(--muted); font-size: 0.82rem; }
.price { font-weight: 800; font-variant-numeric: tabular-nums; }
.description { color: var(--muted); white-space: pre-line; }

.pagination { margin-top: 30px; display: flex; align-items: center; justify-content: center; gap: 16px; }
.pagination span { color: var(--muted); }
.page-narrow { width: min(780px, calc(100% - 32px)); margin-inline: auto; }
.page-medium { width: min(960px, calc(100% - 32px)); margin-inline: auto; }

.cart-layout, .checkout-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  gap: 24px;
  align-items: start;
}
.cart-list { display: grid; gap: 12px; }
.cart-item {
  padding: 14px;
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.cart-item:first-child { border-radius: 16px 16px 0 0; }
.cart-item:last-child { border-bottom: 0; border-radius: 0 0 16px 16px; }
.cart-item:only-child { border-radius: 16px; }
.cart-item img, .cart-thumb-fallback { width: 82px; height: 82px; border-radius: 12px; object-fit: cover; background: var(--paper); }
.cart-thumb-fallback { display: grid; place-items: center; color: var(--brand-active); font-weight: 800; font-size: 1.6rem; }
.cart-item h3 { margin: 0 0 4px; font-size: 1rem; }
.cart-item p { margin: 0; color: var(--muted); font-size: 0.86rem; }
.cart-item-side { display: grid; gap: 10px; justify-items: end; }
.quantity-control { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.quantity-control button { width: 35px; height: 35px; border: 0; color: var(--ink); background: var(--surface); cursor: pointer; }
.quantity-control span { min-width: 42px; text-align: center; font-variant-numeric: tabular-nums; }
.remove-button { border: 0; color: var(--danger); background: transparent; cursor: pointer; font-size: 0.85rem; }

.summary-card {
  position: sticky;
  top: 92px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.summary-card h2 { margin: 0 0 18px; font-size: 1.2rem; }
.summary-line { padding-block: 10px; display: flex; justify-content: space-between; gap: 15px; border-bottom: 1px solid var(--line); }
.summary-line.total { border: 0; font-size: 1.1rem; font-weight: 800; }
.summary-note { margin: 8px 0 18px; color: var(--muted); font-size: 0.87rem; }

.checkout-form, .tracking-card, .success-card {
  padding: clamp(20px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
.info-band, .error-band {
  margin-bottom: 20px;
  padding: 14px 16px;
  border-inline-start: 4px solid var(--brand-active);
  border-radius: 8px;
  color: var(--ink);
  background: color-mix(in srgb, var(--brand-active) 10%, var(--surface));
}
.error-band { border-color: var(--danger); background: color-mix(in srgb, var(--danger) 9%, var(--surface)); }
.checkout-items { margin-top: 18px; display: grid; gap: 10px; }
.checkout-item { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); }

.success-card { max-width: 720px; margin-inline: auto; text-align: center; }
.success-symbol {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: white;
  background: var(--success);
  font-size: 2rem;
}
.reference-box { margin: 24px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; text-align: start; }
.reference-box > div { padding: 16px; border: 1px solid var(--line); border-radius: 12px; }
.reference-box span { display: block; color: var(--muted); font-size: 0.82rem; }
.tracking-code { margin-top: 5px; overflow-wrap: anywhere; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; direction: ltr; }

.tracking-card { max-width: 680px; margin-inline: auto; }
.tracking-card form { display: grid; gap: 14px; }
.tracking-result {
  margin-top: 24px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--brand-active) 3%, var(--surface));
}
.tracking-result-main { display: flex; align-items: center; justify-content: space-between; gap: 18px 28px; }
.tracking-reference, .tracking-state { min-width: 0; display: grid; gap: 6px; }
.tracking-state { justify-items: start; }
.tracking-result-label { color: var(--muted); font-size: .84rem; font-weight: 650; }
.tracking-reference h2 { margin: 0; font-size: clamp(1.35rem, 3vw, 1.8rem); line-height: 1.25; overflow-wrap: anywhere; }
.tracking-status {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 5px 12px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 750;
  line-height: 1.35;
  white-space: nowrap;
}
.tracking-status::before { content: ""; width: 7px; height: 7px; flex: none; border-radius: 50%; background: currentColor; }
.tracking-status--success { color: var(--success); background: color-mix(in srgb, var(--success) 9%, var(--surface)); }
.tracking-status--warning { color: var(--warning); background: color-mix(in srgb, var(--warning) 9%, var(--surface)); }
.tracking-status--danger { color: var(--danger); background: color-mix(in srgb, var(--danger) 9%, var(--surface)); }
.tracking-status--progress { color: var(--brand-deep); background: color-mix(in srgb, var(--brand-active) 11%, var(--surface)); }
.tracking-status--neutral { color: var(--muted); background: color-mix(in srgb, var(--muted) 7%, var(--surface)); }
.status-track { margin: 22px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.status-track span { height: 6px; border-radius: 99px; background: var(--line); }
.status-track span.done { background: var(--brand-active); }

.cart-count {
  min-width: 20px;
  height: 20px;
  padding-inline: 5px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  color: var(--brand-deep);
  background: white;
  font-size: 0.72rem;
  font-weight: 800;
}

.toast {
  position: fixed;
  inset-inline-end: 20px;
  inset-block-end: 24px;
  z-index: 80;
  padding: 12px 16px;
  border-radius: 10px;
  color: var(--on-brand-active);
  background: var(--brand-active);
  box-shadow: var(--shadow);
}

@media (max-width: 980px) {
  .cart-layout, .checkout-layout { grid-template-columns: 1fr; }
  .summary-card { position: static; }
}

@media (max-width: 720px) {
  :root { --shell: min(100% - 24px, 1180px); }
  .section { padding: 40px 0; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .full { grid-column: auto; }
  .reference-box { grid-template-columns: 1fr; }
  .tracking-result { padding: 18px; }
  .tracking-result-main { align-items: start; flex-direction: column; }
  .cart-item { grid-template-columns: 64px minmax(0, 1fr); }
  .cart-item img, .cart-thumb-fallback { width: 64px; height: 64px; }
  .cart-item-side { grid-column: 1 / -1; grid-template-columns: 1fr auto auto; align-items: center; justify-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}