:root {
  --bg: #0b0e14;
  --bg-soft: #121722;
  --card: #161c29;
  --line: #232c3d;
  --text: #e6ebf4;
  --muted: #8d9ab3;
  --accent: #d92b3f;
  --accent-2: #ff5c6e;
  --green: #2ecc8f;
  --amber: #f0a92e;
  --radius: 14px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(217, 43, 63, .18), transparent 60%),
    radial-gradient(700px 400px at 0% 0%, rgba(46, 204, 143, .08), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
header {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(11, 14, 20, .82);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 18px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text); }
.logo span.bolt {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-size: 16px;
}
.nav .spacer { flex: 1; }
.nav a.navlink { color: var(--muted); font-size: 14px; }
.nav a.navlink:hover { color: var(--text); text-decoration: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px; border: 1px solid transparent;
  font: inherit; font-weight: 600; font-size: 14px; cursor: pointer;
  transition: transform .08s ease, opacity .15s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.btn-primary:hover { opacity: .92; text-decoration: none; }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--muted); text-decoration: none; }
.btn-sm { padding: 7px 13px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 48px; }
.hero h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.12; margin: 0 0 18px; letter-spacing: -.02em; }
.hero h1 em { font-style: normal; background: linear-gradient(135deg, var(--accent-2), var(--amber)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 17px; color: var(--muted); max-width: 560px; margin: 0 0 28px; }
.hero-grid { display: grid; grid-template-columns: 1fr 420px; gap: 40px; align-items: start; }

.badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.badge {
  font-size: 12.5px; color: var(--muted); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: 999px; background: var(--bg-soft);
}

/* ---------- cards ---------- */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.card h3 { margin: 0 0 14px; font-size: 16px; }
.card.calc { box-shadow: 0 24px 60px rgba(0,0,0,.45); }

label.field { display: block; margin-bottom: 14px; }
label.field span.lbl { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
input[type=text], input[type=number], input[type=email], input[type=password], select {
  width: 100%; padding: 11px 13px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--text);
  font: inherit; font-size: 14px;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
input[type=range] { width: 100%; accent-color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 16px; }
.chip {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--bg-soft); color: var(--muted); font-size: 13px; cursor: pointer;
}
.chip:hover, .chip.active { border-color: var(--accent); color: var(--text); }

.price-box {
  border: 1px solid var(--line); border-radius: 12px; padding: 16px;
  background: linear-gradient(180deg, rgba(217,43,63,.10), transparent);
  margin-bottom: 16px;
}
.price-box .amount { font-size: 30px; font-weight: 700; letter-spacing: -.02em; }
.price-box .sub { font-size: 13px; color: var(--muted); }

.rows { display: grid; gap: 9px; }
.row { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; }
.row .k { color: var(--muted); }
.row .v { font-variant-numeric: tabular-nums; }

/* ---------- sections ---------- */
section { padding: 56px 0; }
section h2 { font-size: 26px; margin: 0 0 8px; letter-spacing: -.02em; }
section p.sec-lead { color: var(--muted); margin: 0 0 28px; max-width: 620px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.step .num {
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: rgba(217,43,63,.16); color: var(--accent-2); font-weight: 700; font-size: 14px;
  margin-bottom: 12px;
}
.step p { color: var(--muted); margin: 0; font-size: 14px; }

/* ---------- table ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
td.mono, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }

.status { padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.status.SUCCESS { background: rgba(46,204,143,.14); color: var(--green); }
.status.PENDING, .status.NEW, .status.SENT { background: rgba(240,169,46,.14); color: var(--amber); }
.status.FAILED, .status.REFUNDED { background: rgba(217,43,63,.16); color: var(--accent-2); }

/* ---------- misc ---------- */
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mt { margin-top: 18px; }
.center { text-align: center; }
.hidden { display: none !important; }

.alert { padding: 11px 14px; border-radius: 10px; font-size: 13.5px; margin-bottom: 14px; }
.alert.err { background: rgba(217,43,63,.12); color: var(--accent-2); border: 1px solid rgba(217,43,63,.3); }
.alert.ok { background: rgba(46,204,143,.12); color: var(--green); border: 1px solid rgba(46,204,143,.3); }

.copy-box {
  display: flex; align-items: center; gap: 10px; padding: 12px 14px;
  border: 1px dashed var(--line); border-radius: 10px; background: var(--bg-soft);
  word-break: break-all;
}

dialog {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--card);
  color: var(--text); padding: 26px; width: min(400px, calc(100vw - 32px));
}
dialog::backdrop { background: rgba(0,0,0,.65); backdrop-filter: blur(3px); }

.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--line); margin-bottom: 20px; }
.tab {
  padding: 10px 16px; cursor: pointer; color: var(--muted); font-size: 14px;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

footer { border-top: 1px solid var(--line); padding: 30px 0; color: var(--muted); font-size: 13px; }

@media (max-width: 880px) {
  .hero-grid, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 30px; }
  .nav a.navlink.hide-sm { display: none; }
}