:root {
  --bg: #0b0f1a;
  --bg-soft: #111827;
  --card: #151c2c;
  --card-hover: #1b2438;
  --border: #243049;
  --text: #e5e9f2;
  --muted: #8b95ab;
  --primary: #7c5cff;
  --primary-hover: #6a47ff;
  --accent: #22d3ee;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 14px;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); min-height: 100vh; line-height: 1.5; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .6em; }
h1 { font-size: 1.9rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
input, textarea, select, button { font: inherit; color: inherit; }

#root { display: flex; flex-direction: column; min-height: 100vh; }
.main { flex: 1; }
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.section { padding: 36px 16px; }
.narrow { max-width: 760px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center-text { display: block; text-align: center; margin-top: 12px; }

/* Header */
.header { position: sticky; top: 0; z-index: 20; background: rgba(11, 15, 26, .85); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.2rem; color: var(--text); }
.logo:hover { text-decoration: none; }
.logo-mark { font-size: 1.4rem; }
.nav { display: flex; gap: 6px; }
.nav a { color: var(--muted); padding: 8px 14px; border-radius: 10px; font-weight: 500; }
.nav a:hover { color: var(--text); background: var(--card); text-decoration: none; }
.nav a.active { color: var(--text); background: var(--card); }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; padding: 4px 10px; cursor: pointer; font-size: 1.2rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; border-radius: 10px; border: 1px solid transparent; font-weight: 600; cursor: pointer; transition: .15s; }
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-outline { background: transparent; border-color: var(--border); }
.btn-outline:hover:not(:disabled) { border-color: var(--primary); }
.btn-lg { padding: 13px 26px; font-size: 1.05rem; }
.btn-block { width: 100%; }
.link { background: none; border: none; color: var(--accent); cursor: pointer; padding: 0 4px; }

/* Cards & forms */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field span { font-size: .9rem; color: var(--muted); }
.field input, .field textarea, .field select, .search input {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px; padding: 11px 14px; outline: none; width: 100%;
}
.field input:focus, .field textarea:focus, .search input:focus { border-color: var(--primary); }
.field-row { display: grid; gap: 0 14px; }
.field-row.cols-2 { grid-template-columns: 1fr 1fr; }
.checkbox { display: flex; gap: 10px; align-items: flex-start; font-size: .88rem; margin: 16px 0; cursor: pointer; }
.checkbox input { margin-top: 4px; accent-color: var(--primary); }

.alert { padding: 12px 16px; border-radius: 10px; margin: 12px 0; font-size: .92rem; }
.alert-error { background: rgba(239, 68, 68, .12); border: 1px solid rgba(239, 68, 68, .4); color: #fca5a5; }
.alert-success { background: rgba(34, 197, 94, .12); border: 1px solid rgba(34, 197, 94, .4); color: #86efac; }
.alert-info { background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .35); color: #a5f3fc; }
.note { background: var(--bg-soft); border-left: 3px solid var(--accent); padding: 12px 14px; border-radius: 8px; margin: 14px 0; font-size: .9rem; }
.note p { margin: 4px 0 0; color: var(--muted); }

.loading { display: flex; align-items: center; gap: 12px; color: var(--muted); padding: 40px 0; justify-content: center; }
.spinner { width: 22px; height: 22px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.empty { text-align: center; padding: 40px; }

/* Hero */
.hero { background: radial-gradient(ellipse at top, rgba(124, 92, 255, .25), transparent 60%), linear-gradient(180deg, #0f1530, var(--bg)); padding: 70px 0 50px; border-bottom: 1px solid var(--border); }
.hero-inner { max-width: 820px; text-align: center; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
.accent { background: linear-gradient(90deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.search { display: flex; gap: 8px; margin: 24px auto 0; max-width: 560px; }
.search-sm { margin: 0; max-width: 340px; }
.hero-features { display: flex; justify-content: center; gap: 22px; flex-wrap: wrap; margin-top: 22px; color: var(--muted); font-size: .92rem; }

.section-head { display: flex; justify-content: space-between; align-items: baseline; }
.toolbar { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { background: var(--card); border: 1px solid var(--border); padding: 8px 16px; border-radius: 999px; cursor: pointer; }
.chip.active, .chip:hover { border-color: var(--primary); background: rgba(124, 92, 255, .15); }

/* Product grid */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; }
.product-card { position: relative; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; color: var(--text); transition: .18s; }
.product-card:hover { transform: translateY(-3px); border-color: var(--primary); text-decoration: none; background: var(--card-hover); }
.product-card .thumb { border-radius: 0; aspect-ratio: 4 / 3; width: 100%; height: auto; font-size: 2rem; }
.product-card-body { padding: 12px 14px 14px; }
.product-card-name { font-weight: 700; }
.product-card-price { margin-top: 6px; color: var(--accent); font-weight: 600; }
.badge-popular { position: absolute; top: 10px; right: 10px; background: var(--warning); color: #111; font-size: .72rem; font-weight: 700; padding: 3px 8px; border-radius: 999px; }

.thumb { --thumb-color: #6366f1; width: 56px; height: 56px; flex-shrink: 0; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-weight: 800; color: #fff; font-size: 1.1rem; overflow: hidden;
  background: linear-gradient(135deg, var(--thumb-color), color-mix(in srgb, var(--thumb-color) 45%, #000)); }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb-lg { width: 100%; height: auto; aspect-ratio: 16 / 9; font-size: 3rem; margin-bottom: 16px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step-num { width: 34px; height: 34px; border-radius: 50%; background: var(--primary); display: grid; place-items: center; font-weight: 700; margin-bottom: 12px; }
.step p { margin: 0; font-size: .9rem; }

/* Product detail */
.breadcrumb { color: var(--muted); font-size: .88rem; margin-bottom: 18px; }
.detail-layout { display: grid; grid-template-columns: 340px 1fr; gap: 22px; align-items: start; }
.detail-info { position: sticky; top: 84px; }
.detail-info h1 { font-size: 1.5rem; margin-bottom: 4px; }
.detail-form { display: flex; flex-direction: column; gap: 16px; }
.step-badge { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--primary); font-size: .85rem; margin-right: 8px; }
.item-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
.item-option { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; padding: 14px; background: var(--bg-soft); border: 1.5px solid var(--border); border-radius: 12px; cursor: pointer; text-align: left; transition: .12s; }
.item-option:hover { border-color: var(--primary); }
.item-option.selected { border-color: var(--primary); background: rgba(124, 92, 255, .15); box-shadow: 0 0 0 3px rgba(124, 92, 255, .2); }
.item-name { font-weight: 600; font-size: .92rem; }
.item-price { color: var(--accent); font-weight: 600; font-size: .9rem; }
.qty { display: inline-flex; align-items: center; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.qty button { background: var(--bg-soft); border: none; width: 42px; height: 40px; cursor: pointer; font-size: 1.2rem; }
.qty span { min-width: 50px; text-align: center; font-weight: 600; }
.buy-bar { display: flex; justify-content: space-between; align-items: center; gap: 16px; position: sticky; bottom: 12px; box-shadow: 0 10px 30px rgba(0, 0, 0, .4); }
.total { font-size: 1.5rem; font-weight: 800; color: var(--accent); }

/* Checkout */
.checkout-layout { display: grid; grid-template-columns: 1fr 380px; gap: 22px; align-items: start; }
.checkout-main { display: flex; flex-direction: column; gap: 16px; }
.checkout-summary { position: sticky; top: 84px; }
.pay-group { margin-bottom: 16px; }
.pay-group-title { font-size: .85rem; color: var(--muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: .04em; }
.pay-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; }
.pay-option { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 12px; background: var(--bg-soft); cursor: pointer; }
.pay-option input { display: none; }
.pay-option:hover { border-color: var(--primary); }
.pay-option.selected { border-color: var(--primary); background: rgba(124, 92, 255, .15); }
.pay-name { font-weight: 600; }
.summary-product { display: flex; gap: 12px; align-items: center; margin-bottom: 14px; }
.summary-list { margin: 0; }
.summary-list > div { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: .92rem; }
.summary-list dt { color: var(--muted); }
.summary-list dd { margin: 0; text-align: right; word-break: break-word; }
.summary-total { display: flex; justify-content: space-between; align-items: center; padding: 14px 0 4px; font-size: 1.05rem; }
.summary-total strong { font-size: 1.4rem; color: var(--accent); }

/* Order page */
.order-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.order-code { font-size: 1.4rem; font-weight: 800; letter-spacing: .03em; }
.status { padding: 6px 12px; border-radius: 999px; font-size: .82rem; font-weight: 700; }
.status-pending { background: rgba(245, 158, 11, .15); color: #fcd34d; }
.status-paid, .status-processing { background: rgba(34, 211, 238, .15); color: #67e8f9; }
.status-success { background: rgba(34, 197, 94, .15); color: #86efac; }
.status-failed, .status-cancelled { background: rgba(239, 68, 68, .15); color: #fca5a5; }
.progress { display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; padding: 0; margin: 0 0 22px; font-size: .82rem; color: var(--muted); text-align: center; }
.progress li { display: flex; flex-direction: column; align-items: center; gap: 6px; position: relative; }
.progress li::before { content: ''; position: absolute; top: 15px; left: -50%; width: 100%; height: 2px; background: var(--border); z-index: 0; }
.progress li:first-child::before { display: none; }
.progress li.done { color: var(--text); }
.progress li.done::before { background: var(--primary); }
.dot { width: 30px; height: 30px; border-radius: 50%; background: var(--bg-soft); border: 2px solid var(--border); display: grid; place-items: center; z-index: 1; font-weight: 700; }
.progress li.done .dot { background: var(--primary); border-color: var(--primary); color: #fff; }
.pay-box { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; text-align: center; }
.qr-placeholder { width: 190px; height: 190px; margin: 10px auto; border-radius: 12px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; color: #111; font-weight: 800; font-size: 1.4rem;
  background: repeating-conic-gradient(#111 0 25%, #fff 0 50%) 0 0 / 22px 22px; position: relative; }
.qr-placeholder span, .qr-placeholder small { background: #fff; padding: 2px 10px; border-radius: 6px; }
.pay-ref-code { font-size: 1.5rem; font-weight: 800; letter-spacing: .05em; }
.pay-amount { margin: 12px 0 4px; }
.pay-amount strong { color: var(--accent); font-size: 1.2rem; }
.demo-box { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--border); display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--warning); }

/* Static pages */
.prose h2 { font-size: 1.1rem; margin-top: 1.6em; }
.prose p { color: #c6cde0; margin: 0 0 .8em; }

/* Contact */
.contact-layout { display: grid; grid-template-columns: 360px 1fr; gap: 22px; align-items: start; }
.contact-info ul { list-style: none; padding: 0; margin: 0; }
.contact-info li { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.contact-info li:last-child { border: none; }
.contact-info li > span { font-size: 1.3rem; }
.contact-info li div { display: flex; flex-direction: column; font-size: .92rem; }

/* Footer */
.footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding-top: 36px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 24px; }
.footer-grid > div { display: flex; flex-direction: column; gap: 6px; font-size: .9rem; }
.footer h4 { margin: 0 0 6px; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }
.footer-bottom { padding: 20px 16px; margin-top: 24px; border-top: 1px solid var(--border); font-size: .85rem; }

@media (max-width: 900px) {
  .detail-layout, .checkout-layout, .contact-layout { grid-template-columns: 1fr; }
  .detail-info, .checkout-summary { position: static; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--border); padding: 10px 16px; }
  .nav.open { display: flex; }
  .field-row.cols-2 { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .steps, .footer-grid { grid-template-columns: 1fr; }
  .buy-bar { flex-direction: column; align-items: stretch; }
  .search-sm { max-width: none; width: 100%; }
  .card { padding: 16px; }
  h1 { font-size: 1.5rem; }
}