:root {
    --primary: #01c3cd;
    --primary-dark: #0796a0;
    --secondary: #0b1f33;
    --ink: #122033;
    --muted: #667085;
    --bg: #f5f8fb;
    --card: #ffffff;
    --border: #e6edf3;
    --success: #0f9f6e;
    --error: #c0392b;
    --shadow: 0 24px 60px rgba(11, 31, 51, .12);
    --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.88); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -.03em; }
.brand small { background: rgba(1,195,205,.12); color: var(--primary-dark); border-radius: 999px; padding: 2px 8px; font-size: 12px; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 12px; color: #fff; background: linear-gradient(135deg, var(--primary), #33e0e7); box-shadow: 0 12px 24px rgba(1,195,205,.28); }
.nav-links { display: flex; align-items: center; gap: 18px; font-weight: 650; }
.nav-links a { color: #23364d; }
.nav-links a:hover { color: var(--primary-dark); }
.cart-link span { display: inline-grid; place-items: center; min-width: 22px; height: 22px; background: var(--secondary); color: #fff; border-radius: 999px; font-size: 12px; margin-left: 4px; }
.nav-toggle { display: none; background: transparent; border: 0; font-size: 28px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; cursor: pointer; color: #04141f; background: var(--primary); border-radius: 999px; padding: 12px 20px; font-weight: 800; box-shadow: 0 14px 28px rgba(1,195,205,.25); transition: transform .2s, box-shadow .2s, background .2s; }
.btn:hover { transform: translateY(-2px); background: #22d8df; box-shadow: 0 20px 40px rgba(1,195,205,.32); }
.btn-outline { background: #fff; color: var(--ink); border: 1px solid var(--border); box-shadow: none; }
.btn-small { padding: 8px 13px; font-size: 14px; }
.btn-block { width: 100%; }
.danger { background: #fee4e2; color: #b42318; box-shadow: none; }
.text-link { color: var(--primary-dark); font-weight: 800; }
.hero { background: radial-gradient(circle at 80% 20%, rgba(1,195,205,.22), transparent 30%), linear-gradient(135deg, #071a2d 0%, #0b1f33 58%, #0d3144 100%); color: #fff; padding: 90px 0; overflow: hidden; }
.hero-grid, .detail-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; color: var(--primary); background: rgba(1,195,205,.12); padding: 6px 12px; border-radius: 999px; font-weight: 800; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }
h1, h2, h3 { line-height: 1.1; letter-spacing: -.04em; margin: 0 0 14px; }
h1 { font-size: clamp(42px, 7vw, 76px); }
h2 { font-size: clamp(30px, 4vw, 46px); }
h3 { font-size: 24px; }
p { color: var(--muted); }
.hero p { color: rgba(255,255,255,.78); font-size: 20px; max-width: 620px; }
.hero-actions { display: flex; gap: 14px; margin: 28px 0; flex-wrap: wrap; }
.trust-row { display: flex; gap: 14px; flex-wrap: wrap; color: rgba(255,255,255,.82); font-weight: 700; }
.trust-row span { border: 1px solid rgba(255,255,255,.18); padding: 8px 12px; border-radius: 999px; }
.cloud-card, .form-card, .table-card, .summary-card, .product-card, .feature-card, .stat-card, .success-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-card { color: var(--ink); padding: 32px; transform: rotate(2deg); }
.server-stack { display: grid; gap: 12px; margin-bottom: 24px; }
.server-stack span { height: 52px; background: linear-gradient(90deg, #0b1f33, #183752); border-radius: 16px; position: relative; }
.server-stack span::after { content: ''; position: absolute; right: 18px; top: 18px; width: 14px; height: 14px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 24px var(--primary); }
.section { padding: 72px 0; }
.muted { background: #fff; }
.section-heading { text-align: center; max-width: 780px; margin: 0 auto 36px; }
.section-heading.split { max-width: none; display: flex; justify-content: space-between; align-items: end; text-align: left; gap: 24px; }
.feature-grid, .product-grid, .stats-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.product-card, .feature-card, .stat-card, .form-card, .table-card, .summary-card, .cloud-card, .success-card { padding: 26px; }
.product-card { display: flex; flex-direction: column; gap: 16px; }
.badge { align-self: start; background: #ecfeff; color: var(--primary-dark); border: 1px solid #a5f3fc; border-radius: 999px; padding: 5px 10px; font-size: 12px; font-weight: 800; text-transform: uppercase; }
.price { font-size: 30px; font-weight: 900; letter-spacing: -.04em; color: var(--secondary); }
.price.small { font-size: 22px; }
.price.large { font-size: 44px; margin: 20px 0; color: inherit; }
.price small { color: var(--muted); font-size: 14px; font-weight: 700; margin-left: 4px; }
.spec-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.spec-list li { padding-left: 24px; position: relative; }
.spec-list li::before { content: '✓'; color: var(--primary-dark); position: absolute; left: 0; font-weight: 900; }
.card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: auto; }
.page-hero { background: linear-gradient(135deg, #ffffff, #eefcff); padding: 58px 0; border-bottom: 1px solid var(--border); }
.detail-hero { padding: 72px 0; }
.spec-dl { display: grid; gap: 12px; }
.spec-dl div, .summary-line, .summary-product { display: flex; justify-content: space-between; gap: 18px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.spec-dl dt { color: var(--muted); }
.spec-dl dd { margin: 0; font-weight: 900; }
.alert { margin-top: 16px; padding: 14px 18px; border-radius: 16px; font-weight: 700; }
.alert-success { background: #ecfdf3; color: #027a48; border: 1px solid #abefc6; }
.alert-error { background: #fef3f2; color: #b42318; border: 1px solid #fecdca; }
.alert-info { background: #ecfeff; color: #155e75; border: 1px solid #a5f3fc; }
.cart-layout, .checkout-grid, .account-grid, .contact-grid { display: grid; grid-template-columns: 1fr 360px; gap: 24px; align-items: start; }
.checkout-grid { grid-template-columns: 1fr 390px; }
.account-grid { grid-template-columns: 350px 1fr; }
.contact-grid { grid-template-columns: 1fr 380px; }
.responsive-table { width: 100%; border-collapse: collapse; }
th, td { padding: 16px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }
.qty-input { width: 82px; }
.summary-card { position: relative; }
.sticky { position: sticky; top: 96px; }
.summary-line.total { font-size: 20px; border-bottom: 0; }
.empty-state, .success-card { text-align: center; max-width: 820px; margin: 0 auto; }
.success-icon { display: grid; place-items: center; width: 70px; height: 70px; border-radius: 50%; background: #dcfae6; color: var(--success); font-size: 34px; margin: 0 auto 20px; font-weight: 900; }
.order-number { display: inline-flex; background: var(--secondary); color: #fff; padding: 12px 20px; border-radius: 999px; font-weight: 900; letter-spacing: .08em; margin-bottom: 18px; }
.customer-box { text-align: left; background: #f8fafc; border-radius: 18px; padding: 18px; margin: 18px 0; }
form { display: grid; gap: 18px; }
label { display: grid; gap: 8px; color: #344054; font-weight: 750; }
input, textarea, select { width: 100%; border: 1px solid #d0d5dd; border-radius: 14px; padding: 12px 14px; font: inherit; background: #fff; color: var(--ink); }
input:focus, textarea:focus, select:focus { outline: 3px solid rgba(1,195,205,.18); border-color: var(--primary); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.narrow { max-width: 860px; }
.auth-section { min-height: 70vh; display: grid; place-items: center; }
.auth-card { max-width: 480px; }
.field-error { color: var(--error); }
.hint { font-size: 14px; color: var(--muted); }
.demo-payment { border: 1px dashed var(--primary); background: #ecfeff; border-radius: 18px; padding: 18px; display: grid; gap: 8px; }
.inline-form, .inline-admin-form { display: flex; align-items: center; gap: 8px; }
.inline-admin-form select { min-width: 150px; }
.actions { display: flex; align-items: center; gap: 8px; }
.icon-btn { border: 0; background: #fee4e2; color: #b42318; border-radius: 12px; width: 36px; height: 36px; font-size: 24px; cursor: pointer; }
.hidden { display: none; }
.checkbox { display: flex; align-items: center; gap: 10px; }
.checkbox input { width: auto; }
.stat-card span { color: var(--muted); font-weight: 750; }
.stat-card strong { display: block; font-size: 36px; letter-spacing: -.04em; }
.site-footer { background: #071a2d; color: #fff; padding: 54px 0; }
.site-footer p, .site-footer a { color: rgba(255,255,255,.72); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 30px; }
.footer-grid div { display: grid; gap: 8px; align-content: start; }
.footer-brand { color: #fff; }
.admin-main { min-height: 78vh; }
code { background: #f2f4f7; padding: 2px 6px; border-radius: 8px; }
@media (max-width: 1000px) {
    .hero-grid, .detail-grid, .cart-layout, .checkout-grid, .account-grid, .contact-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .feature-grid, .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sticky { position: static; }
}
@media (max-width: 760px) {
    .nav-toggle { display: block; }
    .nav-links { display: none; position: absolute; inset: 76px 16px auto; background: #fff; border: 1px solid var(--border); border-radius: 18px; padding: 18px; box-shadow: var(--shadow); flex-direction: column; align-items: stretch; }
    .nav-links.open { display: flex; }
    .hero { padding: 64px 0; }
    .section { padding: 52px 0; }
    .product-grid, .feature-grid, .stats-grid, .form-grid, .footer-grid { grid-template-columns: 1fr; }
    .section-heading.split { align-items: start; flex-direction: column; }
    .card-actions { grid-template-columns: 1fr; }
    table, thead, tbody, th, td, tr { display: block; }
    thead { display: none; }
    tr { border-bottom: 1px solid var(--border); padding: 12px 0; }
    td { border: 0; padding: 8px 0; }
    td[data-label]::before { content: attr(data-label) ': '; font-weight: 800; color: var(--muted); }
    h1 { font-size: 42px; }
}
.password-card { margin-top: 24px; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }
.customer-id-pill { display: inline-flex; align-items: center; gap: 6px; background: #ecfeff; color: var(--primary-dark); border: 1px solid #a5f3fc; border-radius: 999px; padding: 6px 12px; font-weight: 900; }