:root {
  --bg: #070b18;
  --bg-elev: rgba(12, 22, 48, 0.72);
  --line: rgba(140, 190, 255, 0.16);
  --text: #eef4ff;
  --muted: #9eb0d8;
  --cyan: #00e5ff;
  --blue: #3d7cff;
  --ok: #3ee0a2;
  --danger: #ff7b8a;
  --radius: 22px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(0, 229, 255, 0.16), transparent 60%),
    radial-gradient(700px 380px at 100% 8%, rgba(61, 124, 255, 0.18), transparent 55%),
    var(--bg);
  min-height: 100vh;
}

a { color: var(--cyan); }

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(7, 11, 24, 0.78);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #041018;
  font-size: 18px;
}

nav {
  display: flex;
  gap: 18px;
  align-items: center;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

nav a:hover { color: var(--text); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  border-radius: 999px;
  padding: 14px 22px;
  font: inherit;
  font-weight: 700;
  color: #041018;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.2), 0 10px 30px rgba(0, 140, 255, 0.25);
}

.btn:hover { filter: brightness(1.06); }

.btn-ghost {
  color: var(--text);
  background: transparent;
  box-shadow: inset 0 0 0 1px var(--line);
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
  padding: 56px 0 28px;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

h1 span { color: var(--cyan); }

.lead {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.6;
  max-width: 620px;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.pill {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  color: var(--muted);
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.card h2 { margin: 0 0 8px; font-size: 22px; }
.card p { margin: 0 0 16px; color: var(--muted); }

label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

input[type="email"] {
  width: 100%;
  border: 1px solid var(--line);
  background: #0b1328;
  color: var(--text);
  border-radius: 14px;
  padding: 14px 16px;
  font: inherit;
  margin-bottom: 12px;
}

.hp { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }

.form-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.error {
  display: none;
  margin-top: 10px;
  color: var(--danger);
  font-size: 14px;
}

.result { display: none; }
.result img {
  width: 180px;
  height: 180px;
  background: #e8fbff;
  border-radius: 16px;
  padding: 8px;
}
.sub-url {
  word-break: break-all;
  background: #0b1328;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  font-size: 13px;
  margin: 12px 0;
}
.ok { color: var(--ok); font-weight: 700; }

.grid-3, .grid-2, .features {
  display: grid;
  gap: 16px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: 1fr 1fr; }
.features { grid-template-columns: repeat(3, 1fr); margin: 18px 0 40px; }

.section { padding: 28px 0 10px; }
.section h2 { margin: 0 0 8px; font-size: 30px; }
.section .intro { color: var(--muted); max-width: 640px; margin: 0 0 20px; }

.mini h3 { margin: 0 0 8px; font-size: 18px; }
.mini p { margin: 0; color: var(--muted); line-height: 1.55; }

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(0, 229, 255, 0.12);
  color: var(--cyan);
  font-weight: 800;
  margin-bottom: 10px;
}

.prose {
  color: var(--muted);
  line-height: 1.7;
  max-width: 760px;
}
.prose h1, .prose h2, .prose h3 { color: var(--text); }
.prose a { color: var(--cyan); }

.cta-band {
  margin: 28px 0 10px;
  padding: 28px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(0,229,255,0.08), rgba(61,124,255,0.12));
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

footer {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }

@media (max-width: 860px) {
  .hero, .grid-3, .grid-2, .features, .cta-band, .footer-grid {
    grid-template-columns: 1fr;
    display: grid;
  }
  nav .hide-sm { display: none; }
  .site-header .btn { padding: 10px 14px; font-size: 14px; }
}