:root {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --primary: #f0b11d;
    --accent: #9a6a00;
    --primary-dark: #d4970a;
    --dark: #0b221d;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --radius: 14px;
    --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 6px 24px rgba(15, 23, 42, .06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; letter-spacing: -.02em; }
h1 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
h2 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
img, svg { max-width: 100%; }
code, .mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.center { text-align: center; }
.right { text-align: right; }
.muted { color: var(--muted); }
.text-danger { color: var(--danger); }
.section { padding: 56px 0; }
.section-alt { background: var(--surface); border-block: 1px solid var(--border); }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.section-head h1, .section-head h2, .section-head h3 { margin: 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; margin-bottom: 24px; }
.lead { font-size: 1.12rem; color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 10px 18px; border-radius: 10px; border: 1px solid transparent;
    font: inherit; font-weight: 600; cursor: pointer; text-decoration: none !important;
    transition: background .15s, transform .05s, border-color .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #1a1405; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-dark { background: var(--dark); color: #fff; }
.btn-dark:hover { background: #1e293b; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--muted); }
.btn-sm { padding: 6px 12px; font-size: .9rem; }
.btn-lg { padding: 14px 24px; font-size: 1.05rem; }
.btn-block { width: 100%; margin-top: 10px; }
.link-btn { background: none; border: 0; color: var(--muted); cursor: pointer; font-size: 1rem; padding: 6px; }
.link-btn:hover { color: var(--danger); }

/* ---------- Header ---------- */
.topbar { background: var(--dark); color: #cbd5e1; font-size: .85rem; text-align: center; padding: 8px 16px; }
.site-header { background: rgba(255, 255, 255, .92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
.header-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.3rem; color: var(--text); text-decoration: none !important; }
.logo-mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), #1e4a40); color: #fff; font-size: 1.1rem; }
.logo-light { color: #fff; }
.nav { display: flex; gap: 6px; margin-left: auto; }
.nav a { color: var(--text); font-weight: 500; padding: 8px 12px; border-radius: 8px; }
.nav a:hover, .nav a.active { background: var(--bg); text-decoration: none; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--border); border-radius: 8px; font-size: 1.2rem; padding: 4px 10px; cursor: pointer; }
.cart-btn { position: relative; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; color: var(--text); border: 1px solid var(--border); }
.cart-btn svg { width: 22px; height: 22px; }
.cart-count { position: absolute; top: -6px; right: -6px; background: var(--primary); color: #1a1405; font-size: .75rem; font-weight: 700; min-width: 20px; height: 20px; border-radius: 10px; display: grid; place-items: center; padding: 0 5px; }


/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 4px; background: var(--surface); border: 1px solid var(--border); padding: 4px; border-radius: 12px; }
.tabs a { padding: 6px 16px; border-radius: 8px; color: var(--muted); font-weight: 600; }
.tabs a.active { background: var(--dark); color: #fff; text-decoration: none; }

/* ---------- Product grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 24px; }
.product-cover {
    position: relative; display: flex; flex-direction: column; justify-content: flex-end;
    aspect-ratio: 16 / 10; padding: 18px; color: #fff; text-decoration: none !important; overflow: hidden;
    background: linear-gradient(140deg, var(--c) 0%, color-mix(in srgb, var(--c) 55%, #000) 100%);
}
.product-cover::after { content: ""; position: absolute; width: 70%; aspect-ratio: 1; right: -20%; top: -30%; border-radius: 50%; background: rgba(255, 255, 255, .1); }
.cover-icon { position: absolute; top: 18px; left: 18px; width: 40px; height: 40px; opacity: .9; }
.cover-cat { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; opacity: .85; }
.cover-ver { font-size: 1.6rem; font-weight: 800; line-height: 1.1; }
.badge-off { position: absolute; top: 14px; right: 14px; z-index: 1; background: #fff; color: var(--danger); font-weight: 800; font-size: .85rem; border-radius: 999px; padding: 3px 10px; }
.product-body { padding: 18px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { font-size: 1.05rem; margin-bottom: 6px; }
.product-body h3 a { color: var(--text); }
.product-body .muted { font-size: .92rem; margin: 0 0 16px; }
.product-foot { margin-top: auto; display: flex; align-items: flex-end; justify-content: space-between; gap: 8px; }
.price-box { display: flex; flex-direction: column; line-height: 1.2; }
.price-box s { color: var(--muted); font-size: .88rem; }
.price-box strong { font-size: 1.35rem; }
.stock-in { color: var(--success); font-weight: 600; }
.stock-out { color: var(--danger); font-weight: 600; }

/* ---------- Product detail ---------- */
.breadcrumb { font-size: .9rem; color: var(--muted); margin-bottom: 24px; }
.product-cover-xs { aspect-ratio: 1; width: 56px; padding: 0; border-radius: 10px; flex-shrink: 0; }
.product-cover-xs .cover-icon { width: 26px; height: 26px; top: 15px; left: 15px; }
.product-cover-xs::after { display: none; }
.price-lg { flex-direction: row; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 18px 0; }
.price-lg strong { font-size: 2.2rem; }
.price-lg s { font-size: 1.1rem; }
.save { background: #dcfce7; color: var(--success); font-weight: 700; font-size: .85rem; padding: 3px 10px; border-radius: 999px; }
.buy-form { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin: 18px 0 24px; }
.qty { display: grid; font-size: .85rem; color: var(--muted); }
.qty input { width: 80px; }
.features { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.features li { padding-left: 28px; position: relative; }
.features li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 800; }
.description p { color: #334155; }
.related-title { margin-top: 48px; }

/* ---------- Steps / FAQ ---------- */
.faq { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 0 20px; margin-bottom: 12px; }
.faq summary { cursor: pointer; font-weight: 600; padding: 16px 0; list-style: none; display: flex; justify-content: space-between; }
.faq summary::after { content: "+"; font-size: 1.3rem; color: var(--muted); }
.faq[open] summary::after { content: "−"; }
.faq p { margin: 0 0 16px; color: var(--muted); }

/* ---------- Cart / checkout ---------- */
.cart-layout { display: grid; grid-template-columns: 1fr 360px; gap: 24px; align-items: start; }
.cart-row { display: flex; align-items: center; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.cart-row:last-of-type { border-bottom: 0; }
.cart-name { flex: 1; display: grid; }
.cart-name a { color: var(--text); font-weight: 600; }
.cart-row input[type=number] { width: 72px; }
.cart-line { min-width: 90px; text-align: right; }
.summary { position: sticky; top: 90px; }
.summary-row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; color: var(--muted); }
.summary-row.total { color: var(--text); font-weight: 800; font-size: 1.15rem; border-top: 1px solid var(--border); margin-top: 8px; padding-top: 14px; }
.empty { text-align: center; padding: 48px; }

/* ---------- Forms ---------- */
.form label { display: grid; gap: 6px; font-weight: 500; margin-bottom: 16px; }
input, select, textarea {
    font: inherit; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: #fff; color: var(--text); width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--primary) 35%, transparent); border-color: var(--primary); }
input[type=checkbox] { width: 18px; height: 18px; margin-top: 3px; }
input[type=color] { padding: 4px; height: 44px; }
.form label.check { display: flex; align-items: flex-start; gap: 10px; font-weight: 400; font-size: .92rem; color: var(--muted); }
.err { color: var(--danger); font-weight: 500; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.span-2 { grid-column: span 2; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.inline { display: inline; }
.filters { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; }
.filters input { flex: 1; min-width: 200px; }
.filters select { width: auto; }
.login { max-width: 400px; margin: 40px auto; }

.alert { padding: 12px 16px; border-radius: 10px; margin: 16px 0; font-weight: 500; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-info { background: #e0f2fe; color: #075985; }

/* ---------- Order page ---------- */
.success-head { text-align: center; margin-bottom: 32px; }
.license { display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--bg); border: 1px dashed var(--border); border-radius: 10px; padding: 12px 16px; margin-bottom: 10px; }
.license code { font-size: 1.05rem; font-weight: 700; word-break: break-all; }
.howto { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--border); }
.howto ol { color: #334155; padding-left: 20px; }

/* ---------- Admin ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 8px; }
.stat { display: grid; gap: 4px; }
.stat b { font-size: 1.6rem; }
.table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.table th { text-align: left; color: var(--muted); font-weight: 600; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; }
.table th, .table td { padding: 12px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table tr:last-child td { border-bottom: 0; }
.card:has(> .table) { overflow-x: auto; }
.pill { display: inline-block; border: 0; font: inherit; font-size: .8rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; cursor: default; }
button.pill { cursor: pointer; }
.pill-paid { background: #dcfce7; color: #166534; }
.pill-pending { background: #fef3c7; color: #92400e; }
.pill-cancelled { background: #f1f5f9; color: #475569; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 8px; }
.admin-actions { display: flex; gap: 8px; }
.admin-nav { margin-left: 24px; margin-right: auto; }

/* ---------- Footer ---------- */
.site-footer { background: var(--dark); color: #94a3b8; padding: 48px 0 24px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; margin: 0 0 12px; }
.site-footer a:not(.logo) { display: block; color: #94a3b8; margin-bottom: 6px; }
.footer-bottom { border-top: 1px solid #1e293b; margin-top: 32px; padding-top: 20px; font-size: .85rem; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .hero-inner, .product-detail, .cart-layout { grid-template-columns: 1fr; }
    .steps, .stats { grid-template-columns: repeat(2, 1fr); }
    .summary { position: static; }
}
@media (max-width: 720px) {
    .nav-toggle { display: block; }
    .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 16px; border-bottom: 1px solid var(--border); }
    .nav.open { display: flex; }
    .admin .nav { display: none; }
    .header-inner { position: relative; gap: 12px; }
    .hero { padding: 56px 0; }
    .section { padding: 40px 0; }
    .steps, .footer-grid, .form-grid { grid-template-columns: 1fr; }
    .span-2 { grid-column: auto; }
    .cart-row { flex-wrap: wrap; }
    .cart-name { min-width: 60%; }
}