:root {
  --bg: #070b18;
  --bg2: #0d1326;
  --card: #111a33;
  --line: #1f2a48;
  --text: #e6e9f5;
  --muted: #9aa4c2;
  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --pink: #f472b6;
  --grad: linear-gradient(90deg, var(--cyan), var(--violet) 55%, var(--pink));
  --radius: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* Nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 24, .65);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.nav .wrap { display: flex; align-items: center; height: 68px; gap: 32px; }
.logo { font-weight: 800; font-size: 20px; letter-spacing: -.02em; display: flex; align-items: center; gap: 10px; }
.logo i {
  width: 26px; height: 26px; border-radius: 8px; background: var(--grad);
  display: inline-block; position: relative;
}
.logo i::after {
  content: ""; position: absolute; inset: 7px; border-radius: 50%; background: var(--bg);
}
.nav ul { list-style: none; display: flex; gap: 28px; margin: 0 0 0 auto; padding: 0; }
.nav ul a { color: var(--muted); font-size: 15px; font-weight: 500; }
.nav ul a:hover { color: var(--text); }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; font-family: inherit;
  transition: transform .15s, box-shadow .15s, background .15s;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 30px rgba(139, 92, 246, .35); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 40px rgba(139, 92, 246, .5); }
.btn-ghost { border-color: rgba(255, 255, 255, .18); color: var(--text); }
.btn-ghost:hover { background: rgba(255, 255, 255, .06); }

/* Hero */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: url(img/hero.jpg) center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 11, 24, .82) 0%, rgba(7, 11, 24, .45) 55%, rgba(7, 11, 24, .1) 100%),
    linear-gradient(180deg, rgba(7, 11, 24, .1) 60%, var(--bg));
}
.hero .wrap { position: relative; padding-top: 120px; padding-bottom: 80px; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--cyan);
  padding: 6px 14px; border: 1px solid rgba(34, 211, 238, .35); border-radius: 999px;
  background: rgba(34, 211, 238, .06);
}
h1 {
  font-size: clamp(40px, 6.4vw, 76px); line-height: 1.04; letter-spacing: -.035em;
  margin: 24px 0 22px; font-weight: 800; max-width: 900px;
}
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 640px; margin: 0 0 36px; }
.cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-tags { display: flex; gap: 28px; margin-top: 64px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.hero-tags span::before { content: "◆"; color: var(--violet); margin-right: 8px; font-size: 10px; }

/* Sections */
section { padding: 110px 0; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.03em; line-height: 1.1; margin: 16px 0; }
.section-head p { color: var(--muted); font-size: 18px; margin: 0; }
.kicker { font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--violet); }

/* Solutions */
.solution {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center;
  margin-bottom: 96px;
}
.solution:last-child { margin-bottom: 0; }
.solution:nth-child(even) .media { order: 2; }
.media {
  border-radius: 22px; overflow: hidden; border: 1px solid var(--line);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5), 0 0 0 1px rgba(139, 92, 246, .08);
  aspect-ratio: 16 / 10;
}
.media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.solution:hover .media img { transform: scale(1.04); }
.solution .num { font-family: ui-monospace, monospace; color: var(--cyan); font-size: 14px; }
.solution h3 { font-size: 32px; letter-spacing: -.025em; margin: 10px 0 14px; line-height: 1.15; }
.solution p { color: var(--muted); margin: 0 0 22px; font-size: 17px; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checks li { padding-left: 30px; position: relative; font-size: 15.5px; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 5px; width: 18px; height: 18px; border-radius: 6px;
  background: rgba(34, 211, 238, .12) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2322d3ee'%3E%3Cpath d='M8.2 13.6 4.6 10l1.2-1.2 2.4 2.4 6-6 1.2 1.2z'/%3E%3C/svg%3E") center / 14px no-repeat;
}

/* Process */
.alt { background: var(--bg2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: border-color .2s, transform .2s;
}
.card:hover { border-color: rgba(139, 92, 246, .5); transform: translateY(-3px); }
.steps .card::before {
  counter-increment: s; content: "0" counter(s);
  font-family: ui-monospace, monospace; font-size: 13px; color: var(--cyan);
}
.card h4 { font-size: 19px; margin: 14px 0 8px; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.principles .card { display: flex; gap: 18px; }
.icon {
  flex: none; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(34, 211, 238, .18), rgba(139, 92, 246, .18));
  border: 1px solid rgba(139, 92, 246, .3); font-size: 20px;
}
.principles h4 { margin-top: 0; }

/* About */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about blockquote {
  margin: 0; font-size: clamp(24px, 2.8vw, 34px); line-height: 1.3; letter-spacing: -.02em; font-weight: 600;
}
.about blockquote span { color: var(--muted); font-size: 15px; font-weight: 400; display: block; margin-top: 18px; letter-spacing: 0; }
.about p { color: var(--muted); font-size: 17px; }

/* Contact */
.contact {
  border-radius: 28px; padding: 72px 56px; text-align: center; position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(34, 211, 238, .12), rgba(139, 92, 246, .18) 50%, rgba(244, 114, 182, .12));
  border: 1px solid rgba(139, 92, 246, .3);
}
.contact h2 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -.03em; margin: 0 0 14px; }
.contact p { color: var(--muted); font-size: 18px; margin: 0 auto 32px; max-width: 560px; }
.contact .cta { justify-content: center; }

footer { padding: 48px 0; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }
footer .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

/* Payment page */
.page { padding: 140px 0 100px; min-height: 100vh;
  background: radial-gradient(ellipse at top, rgba(139, 92, 246, .14), transparent 60%); }
.pay-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; align-items: start; }
.options { display: grid; gap: 14px; }
.option {
  display: flex; gap: 18px; align-items: flex-start; cursor: pointer;
  background: var(--card); border: 1.5px solid var(--line); border-radius: var(--radius); padding: 22px 24px;
  transition: border-color .15s, background .15s;
}
.option:hover { border-color: rgba(139, 92, 246, .5); }
.option input[type=radio] { flex: none; margin-top: 5px; accent-color: var(--violet); width: 18px; height: 18px; }
.option.selected { border-color: var(--violet); background: #151f3d; }
.option .t { font-weight: 700; font-size: 17px; }
.option .d { color: var(--muted); font-size: 14.5px; margin-top: 4px; }
.option .p { margin-left: auto; font-weight: 700; font-size: 18px; white-space: nowrap; }
.fields { display: grid; gap: 14px; margin-top: 16px; }
.fields[hidden] { display: none; }
.f { display: grid; gap: 6px; font-size: 14px; color: var(--muted); font-weight: 500; }
.f input {
  font: inherit; font-size: 16px; color: var(--text); background: var(--bg); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 14px; outline: none;
}
.f input:focus { border-color: var(--violet); box-shadow: 0 0 0 3px rgba(139, 92, 246, .2); }
.summary { position: sticky; top: 100px; }
.summary h3 { margin: 0 0 18px; font-size: 18px; }
.row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.row.total { border: 0; font-size: 20px; font-weight: 800; padding-top: 18px; }
.summary .btn { width: 100%; justify-content: center; margin-top: 18px; padding: 15px; font-size: 16px; }
.summary .btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.secure { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 13px; margin-top: 16px; }
.cards-acc { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.cards-acc span {
  font-size: 11px; font-weight: 700; letter-spacing: .04em; padding: 5px 9px; border-radius: 6px;
  border: 1px solid var(--line); color: var(--muted);
}
.notice {
  padding: 14px 18px; border-radius: 12px; font-size: 14.5px; margin-bottom: 20px;
  background: rgba(244, 114, 182, .08); border: 1px solid rgba(244, 114, 182, .35);
}
.notice.test { background: rgba(34, 211, 238, .07); border-color: rgba(34, 211, 238, .35); }
.err { color: var(--pink); font-size: 14px; margin-top: 12px; min-height: 1em; }
.done { max-width: 560px; margin: 0 auto; text-align: center; }
.done .tick {
  width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 24px; display: grid; place-items: center;
  background: var(--grad); font-size: 34px; color: #fff; font-weight: 800;
}

@media (max-width: 900px) {
  .nav ul { display: none; }
  .nav .btn { margin-left: auto; }
  .solution, .about, .pay-grid { grid-template-columns: 1fr; gap: 32px; }
  .solution:nth-child(even) .media { order: 0; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .principles { grid-template-columns: 1fr; }
  .summary { position: static; }
  section { padding: 80px 0; }
  .contact { padding: 48px 24px; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  .steps { grid-template-columns: 1fr; }
  .nav .wrap { gap: 12px; }
  .nav .btn { padding: 9px 14px; font-size: 14px; }
}