:root {
  --bg: #0b1020;
  --panel: #12182b;
  --panel-2: #161d33;
  --text: #e8ecf3;
  --muted: #a9b2c7;
  --primary: #5b8cff;
  --primary-600: #3f6ef0;
  --ring: rgba(91, 140, 255, 0.4);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(91,140,255,.25), transparent 60%),
              radial-gradient(900px 500px at -10% 10%, rgba(108, 225, 255, .18), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { width: min(1100px, 92%); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(1.2) blur(8px);
  background: linear-gradient(to bottom, rgba(11,16,32,.8), rgba(11,16,32,.2));
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: flex; align-items: baseline; gap: 8px; font-weight: 700; letter-spacing: 0.5px; }
.logo { color: var(--text); font-size: 22px; }
.logo-alt { color: var(--primary); font-size: 22px; }

.btn { 
  appearance: none; border: none; cursor: pointer; border-radius: 10px;
  padding: 10px 14px; font-weight: 600; color: var(--text);
  transition: transform .08s ease, background .2s ease, box-shadow .2s ease;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-600)); box-shadow: 0 6px 18px var(--ring); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; border: 1px solid rgba(255,255,255,.1); }
.btn-ghost:hover { background: rgba(255,255,255,.04); }
.btn-block { width: 100%; padding: 12px 16px; }

.hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items: center; padding: 72px 0; }
.hero-title { font-size: clamp(36px, 5vw, 56px); line-height: 1.1; margin: 0 0 12px; }
.hero-subtitle { color: var(--muted); margin: 0 0 22px; font-size: 18px; }
.hero-actions { display: flex; gap: 12px; align-items: center; }

.hero-card .card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; }
.benefits { margin: 10px 0 0; padding-left: 18px; color: var(--muted); }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding: 12px 0 80px; }
.feature { background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.06); border-radius: 14px; padding: 18px; }
.feature .icon { font-size: 22px; margin-bottom: 4px; }

.site-footer { border-top: 1px solid rgba(255,255,255,.06); background: rgba(0,0,0,.2); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; padding: 18px 0; color: var(--muted); }
.footer-link { color: var(--muted); text-decoration: none; }
.footer-link:hover { color: var(--text); }

.modal::backdrop { background: rgba(0,0,0,.55); }
.modal { border: none; padding: 0; border-radius: 16px; width: min(440px, 92%); }
.modal-card { background: linear-gradient(180deg, var(--panel), var(--panel-2)); color: var(--text); border: 1px solid rgba(255,255,255,.08); border-radius: 16px; padding: 20px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.icon-button { background: transparent; border: 1px solid rgba(255,255,255,.08); color: var(--muted); border-radius: 10px; padding: 6px 10px; cursor: pointer; }
.icon-button:hover { background: rgba(255,255,255,.06); color: var(--text); }

.field { display: grid; gap: 8px; margin: 12px 0 6px; }
.field label { font-size: 14px; color: var(--muted); }
.field input { background: #0f1527; border: 1px solid rgba(255,255,255,.08); color: var(--text); border-radius: 10px; padding: 12px 12px; outline: none; }
.field input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--ring); }
.error { color: #ff7b7b; min-height: 16px; }
.helper { color: var(--muted); text-align: center; margin-top: 8px; font-size: 12px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 52px 0; }
  .hero-card { order: -1; }
  .features { grid-template-columns: 1fr; }
}