:root {
  --sn-bg: #f7f7f4;
  --sn-surface: #fff;
  --sn-border: #e3e3dc;
  --sn-text: #1f2421;
  --sn-muted: #626a65;
  --sn-brand: #0f766e;
  --sn-brand-dark: #115e59;
  --sn-danger: #b42318;
  --sn-ok: #157f3b;
  --sn-radius: 10px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif; background: var(--sn-bg); color: var(--sn-text); font-size: 15px; line-height: 1.5; }
a { color: var(--sn-brand); }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid #f59e0b; outline-offset: 2px; }
h1 { font-size: 24px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 0 0 12px; }

.sn-header { background: var(--sn-surface); border-bottom: 1px solid var(--sn-border); position: sticky; top: 0; z-index: 10; }
.sn-header-inner { max-width: 1100px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; gap: 20px; }
.sn-logo { font-weight: 800; font-size: 20px; color: var(--sn-brand); text-decoration: none; }
.sn-nav { display: flex; gap: 18px; flex: 1; }
.sn-nav a { color: var(--sn-text); text-decoration: none; font-weight: 500; }
.sn-nav a:hover, .sn-nav a.active { color: var(--sn-brand); }
.sn-badge { display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 999px; background: var(--sn-brand); color: #fff; font-size: 12px; text-align: center; font-weight: 700; }
.sn-account { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.sn-burger { display: none; font-size: 22px; background: none; border: 1px solid var(--sn-border); border-radius: 8px; padding: 4px 10px; cursor: pointer; }
.sn-mobile-menu { display: none; }
.sn-promo { background: #e6f4f1; color: #134e48; text-align: center; font-size: 13px; padding: 8px 16px; }
.sn-main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 48px; outline: none; min-height: 60vh; }
.sn-footer { text-align: center; color: var(--sn-muted); font-size: 12px; padding: 24px 16px; border-top: 1px solid var(--sn-border); }

@media (max-width: 640px) {
  .sn-nav, .sn-account { display: none; }
  .sn-burger { display: block; margin-left: auto; }
  .sn-mobile-menu:not([hidden]) { display: flex; flex-direction: column; border-top: 1px solid var(--sn-border); padding: 8px 16px 12px; background: var(--sn-surface); }
  .sn-mobile-menu a, .sn-mobile-menu button { padding: 10px 0; color: var(--sn-text); text-decoration: none; font-weight: 500; border-bottom: 1px solid #f0f0ea; text-align: left; background: none; border-left: 0; border-right: 0; border-top: 0; font: inherit; cursor: pointer; }
}

.sn-btn { font: inherit; font-weight: 600; font-size: 14px; border-radius: 8px; padding: 9px 16px; border: 1px solid transparent; cursor: pointer; background: var(--sn-brand); color: #fff; min-height: 40px; }
.sn-btn:hover { background: var(--sn-brand-dark); }
.sn-btn[disabled] { background: #c9cdca; color: #5d625f; cursor: not-allowed; }
.sn-btn-outline { background: #fff; color: var(--sn-text); border-color: var(--sn-border); }
.sn-btn-outline:hover { background: #f2f2ee; }
.sn-btn-link { background: none; border: none; color: var(--sn-brand); cursor: pointer; font: inherit; padding: 4px; text-decoration: underline; }
.sn-btn-block { width: 100%; }

.sn-toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.sn-toolbar input[type='search'] { flex: 1 1 220px; }
.sn-count { color: var(--sn-muted); font-size: 14px; margin-bottom: 12px; }
input, select, textarea { font: inherit; padding: 9px 12px; border: 1px solid var(--sn-border); border-radius: 8px; background: #fff; min-height: 40px; color: inherit; }
textarea { width: 100%; resize: vertical; }
.sn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.sn-card { background: var(--sn-surface); border: 1px solid var(--sn-border); border-radius: var(--sn-radius); overflow: hidden; display: flex; flex-direction: column; }
.sn-thumb { height: 130px; display: grid; place-items: center; font-size: 48px; background: linear-gradient(135deg, #e9f5f2, #f4f1e8); }
.sn-card-body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.sn-card h3 { font-size: 15px; margin: 0; }
.sn-card h3 a { color: var(--sn-text); text-decoration: none; }
.sn-card h3 a:hover { color: var(--sn-brand); text-decoration: underline; }
.sn-cat { font-size: 12px; color: var(--sn-muted); }
.sn-price { font-weight: 700; font-size: 17px; }
.sn-stock { font-size: 12px; font-weight: 600; }
.sn-stock.out { color: var(--sn-danger); }
.sn-stock.low { color: #b45309; }
.sn-stock.ok { color: var(--sn-ok); }
.sn-card .sn-btn { margin-top: auto; }

.sn-panel { background: var(--sn-surface); border: 1px solid var(--sn-border); border-radius: var(--sn-radius); padding: 24px; }
.sn-narrow { max-width: 460px; margin: 0 auto; }
.sn-field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
.sn-field label { font-weight: 600; font-size: 14px; }
.sn-field .sn-help { font-size: 12px; color: var(--sn-muted); }
.sn-field .sn-err { font-size: 13px; color: var(--sn-danger); }
.sn-field input[aria-invalid='true'] { border-color: var(--sn-danger); }
.sn-alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.sn-alert.err { background: #fdecea; color: #7a1a12; }
.sn-alert.ok { background: #e7f6ec; color: #145c30; }
.sn-row { display: flex; gap: 12px; }
.sn-row > * { flex: 1; }

.sn-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.sn-detail .sn-thumb { height: 280px; border-radius: var(--sn-radius); font-size: 96px; }
@media (max-width: 700px) { .sn-detail { grid-template-columns: 1fr; } .sn-detail .sn-thumb { height: 180px; } }

.sn-cart-table { width: 100%; border-collapse: collapse; background: var(--sn-surface); border-radius: var(--sn-radius); overflow: hidden; border: 1px solid var(--sn-border); }
.sn-cart-table th, .sn-cart-table td { padding: 12px; border-bottom: 1px solid var(--sn-border); text-align: left; vertical-align: middle; }
.sn-cart-table th { font-size: 12px; text-transform: uppercase; color: var(--sn-muted); background: #fafaf7; }
.sn-qty { display: inline-flex; align-items: center; gap: 4px; }
.sn-qty input { width: 64px; text-align: center; }
.sn-qty button { width: 34px; height: 34px; border: 1px solid var(--sn-border); background: #fff; border-radius: 6px; cursor: pointer; font-size: 16px; }
.sn-cart-layout { display: grid; grid-template-columns: 1fr 320px; gap: 20px; align-items: start; }
@media (max-width: 820px) {
  .sn-cart-layout { grid-template-columns: 1fr; }
  .sn-cart-table thead { display: none; }
  .sn-cart-table tr { display: grid; grid-template-columns: 1fr auto; gap: 6px; padding: 10px 0; border-bottom: 1px solid var(--sn-border); }
  .sn-cart-table td { border: none; padding: 4px 12px; }
}
.sn-summary dl { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin: 0 0 16px; }
.sn-summary dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.sn-summary .total { font-weight: 800; font-size: 18px; border-top: 1px solid var(--sn-border); padding-top: 8px; }
.sn-coupon { display: flex; gap: 8px; margin-bottom: 8px; }
.sn-coupon input { flex: 1; min-width: 0; }

.sn-checkout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px; min-width: 620px; }
.sn-test-note { background: #fff7e6; color: #7a4b00; padding: 8px 12px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; }

.sn-orders .sn-order { background: var(--sn-surface); border: 1px solid var(--sn-border); border-radius: var(--sn-radius); padding: 14px 16px; margin-bottom: 12px; }
.sn-order-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-weight: 600; }
.sn-order ul { margin: 8px 0 0; padding-left: 18px; color: var(--sn-muted); font-size: 14px; }
.sn-empty { text-align: center; padding: 40px 16px; color: var(--sn-muted); background: var(--sn-surface); border: 1px dashed var(--sn-border); border-radius: var(--sn-radius); }
.sn-loading { color: var(--sn-muted); padding: 32px 0; text-align: center; }

.sn-toast { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); background: #1f2421; color: #fff; padding: 10px 16px; border-radius: 8px; font-size: 14px; opacity: 0; pointer-events: none; transition: opacity 0.2s; max-width: calc(100% - 32px); }
.sn-toast.show { opacity: 1; }
.sn-toast.err { background: var(--sn-danger); }