:root {
  --bg: #07090f;
  --bg-elev: #0e121b;
  --bg-card: #131925;
  --line: #1e2736;
  --text: #e8eef8;
  --muted: #8b97ab;
  --accent: #3d8bff;
  --accent-2: #22d3a6;
  --warn: #f5b942;
  --danger: #ff5d6c;
  --radius: 16px;
  --shadow: 0 20px 50px rgba(0,0,0,.35);
  --font: "Segoe UI", Inter, system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

/* Header */
header {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(16px);
  background: rgba(7,9,15,.78);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .02em; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #7a5cff);
  display: grid; place-items: center; font-size: 14px;
}
.nav-links { display: flex; gap: 22px; color: var(--muted); font-size: 14px; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta { display: flex; gap: 10px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 0; cursor: pointer; font-weight: 600; font-size: 14px;
  border-radius: 10px; padding: 10px 16px; color: #fff;
  background: #1a2230;
}
.btn:hover { filter: brightness(1.08); }
.btn-primary { background: linear-gradient(135deg, var(--accent), #5b6bff); }
.btn-green { background: linear-gradient(135deg, #14b88a, var(--accent-2)); color: #062018; }
.btn-ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn-full { width: 100%; }
.hamburger { display: none; background: none; border: 0; color: #fff; font-size: 24px; }

/* Hero */
.hero {
  padding: 88px 0 64px;
  background:
    radial-gradient(800px 400px at 80% -10%, rgba(61,139,255,.22), transparent),
    radial-gradient(600px 300px at 10% 20%, rgba(34,211,166,.08), transparent);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.kicker { color: var(--accent-2); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; font-weight: 700; }
h1 { font-size: clamp(36px, 5vw, 58px); line-height: 1.08; letter-spacing: -.03em; margin: 12px 0 16px; }
.lead { color: var(--muted); font-size: 18px; max-width: 520px; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.stats { display: flex; gap: 28px; margin-top: 36px; color: var(--muted); font-size: 13px; }
.stats b { display: block; color: #fff; font-size: 20px; }

.preview-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 20px; padding: 22px; box-shadow: var(--shadow);
}
.preview-card h3 { margin-bottom: 14px; }
.spec-row { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.spec-row span { color: #fff; }
.price-lg { font-size: 32px; margin: 16px 0 12px; }
.price-lg small { font-size: 14px; color: var(--muted); font-weight: 500; }

/* Sections */
section { padding: 72px 0; }
.section-head { margin-bottom: 28px; }
h2 { font-size: 32px; letter-spacing: -.02em; margin: 6px 0 8px; }
.muted { color: var(--muted); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.card h3 { margin-bottom: 8px; }
.steps { counter-reset: step; }
.step { position: relative; padding-left: 0; }
.step::before {
  counter-increment: step; content: counter(step);
  display: inline-grid; place-items: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: #1b2740; color: var(--accent); font-weight: 700; font-size: 13px;
  margin-bottom: 10px;
}

/* Plans catalog */
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.plan {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 18px; padding: 22px;
  display: flex; flex-direction: column; gap: 10px;
}
.plan.featured { border-color: var(--accent); box-shadow: 0 0 0 1px rgba(61,139,255,.35); }
.badge { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); font-weight: 700; }
.plan .price { font-size: 28px; }
.plan ul { list-style: none; color: var(--muted); font-size: 14px; display: grid; gap: 7px; margin: 8px 0 12px; }
.plan ul li::before { content: "▸ "; color: var(--accent-2); }

/* Configurator */
.config {
  display: grid; grid-template-columns: 1.3fr .7fr; gap: 22px;
}
label.block { display: block; font-size: 13px; color: var(--muted); margin: 14px 0 6px; }
select, input, textarea {
  width: 100%; background: #0c111a; border: 1px solid var(--line);
  color: #fff; border-radius: 10px; padding: 11px 12px; font: inherit;
}
textarea { min-height: 110px; resize: vertical; }
.range-row { display: flex; justify-content: space-between; font-size: 13px; color: var(--muted); }
input[type=range] { accent-color: var(--accent); }
.summary { position: sticky; top: 90px; }
.total { font-size: 34px; margin: 8px 0 16px; }

/* Checkout */
.checkout { display: grid; grid-template-columns: 1fr .85fr; gap: 22px; }
.wallet-box {
  background: #0b1220; border: 1px dashed #2a3a55; border-radius: 12px;
  padding: 14px; word-break: break-all; font-family: ui-monospace, monospace; font-size: 13px;
}
.pay-tabs { display: flex; gap: 8px; margin: 10px 0 12px; flex-wrap: wrap; }
.pay-tabs button.active { background: var(--accent); }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.status { font-size: 12px; padding: 3px 8px; border-radius: 99px; background: #1b2433; }
.status.paid { background: #12362c; color: var(--accent-2); }
.status.pending { background: #3a2e12; color: var(--warn); }
.status.expired { background: #3a151b; color: var(--danger); }

/* Admin */
.admin-grid { display: grid; grid-template-columns: 220px 1fr; gap: 22px; }
.side { background: var(--bg-card); border: 1px solid var(--line); border-radius: 14px; padding: 12px; height: fit-content; }
.side a, .side button {
  display: block; width: 100%; text-align: left; background: none; border: 0;
  color: var(--muted); padding: 10px 12px; border-radius: 8px; cursor: pointer; font: inherit;
}
.side a.active, .side button.active, .side a:hover, .side button:hover { background: #1a2230; color: #fff; }
.panel { display: none; }
.panel.active { display: block; }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 13px; }
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.toast {
  position: fixed; bottom: 20px; right: 20px; background: #152033;
  border: 1px solid var(--line); padding: 12px 16px; border-radius: 10px;
  display: none; z-index: 80;
}
.toast.show { display: block; }

@media (max-width: 900px) {
  .hero-grid, .config, .checkout, .admin-grid, .plans, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
    background: #0c111a; padding: 16px 20px; border-bottom: 1px solid var(--line);
  }
  .hamburger { display: block; }
  .summary { position: static; }
}