:root {
  --bg: #0c1017;
  --panel: #141b29;
  --panel2: #1c2436;
  --border: #263149;
  --text: #eef1f8;
  --muted: #97a3bb;
  --accent: #4f8cff;
  --accent2: #7c5cff;
  --ok: #34d17b;
  --err: #ff5c7a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(12, 16, 23, .85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; }
.brand-icon {
  display: inline-block;
  width: 36px; height: 36px; border-radius: 10px;
  background: url('logo.svg') center/cover no-repeat;
}
.nav nav { display: flex; align-items: center; gap: 18px; }
.nav nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav nav a:hover { color: var(--text); }
.btn-ghost {
  padding: 7px 14px; border: 1px solid var(--border); border-radius: 8px;
  color: var(--text) !important;
}
.btn-ghost:hover { border-color: var(--accent); }

/* Hero */
.hero {
  padding: 90px 0 70px;
  text-align: center;
  background:
    radial-gradient(800px 400px at 70% -10%, rgba(124, 92, 255, .18), transparent 60%),
    radial-gradient(700px 380px at 20% 0%, rgba(79, 140, 255, .16), transparent 60%);
}
.hero h1 {
  margin: 0 0 12px;
  font-size: 56px; line-height: 1.1;
  background: linear-gradient(135deg, #fff, #b9c8f5);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tagline { max-width: 640px; margin: 0 auto 28px; color: var(--muted); font-size: 19px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; font-weight: 600; font-size: 16px;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(79, 140, 255, .35);
  transition: transform .12s ease, filter .12s ease;
  border: 0; cursor: pointer;
}
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn-primary.big { font-size: 17px; padding: 15px 32px; }
.btn-outline {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text); font-weight: 600; font-size: 16px;
  text-decoration: none;
}
.btn-outline:hover { border-color: var(--accent); }
.hero-note { margin-top: 22px; color: var(--muted); font-size: 13px; }

/* Sections */
section { padding: 64px 0; }
section h2 { font-size: 32px; margin: 0 0 8px; text-align: center; }
section > .container > p:first-of-type:not(.muted) { text-align: center; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.features { border-top: 1px solid var(--border); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-top: 28px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 22px; }
.card:hover { border-color: var(--accent2); }
.card-icon { font-size: 28px; }
.card h3 { margin: 12px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.download { text-align: center; border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(79,140,255,.06), transparent); }
.download p { color: var(--muted); }
.download .btn-primary { margin-top: 8px; }

.feedback { border-top: 1px solid var(--border); }
.feedback .container { max-width: 760px; }
.feedback form { margin-top: 22px; }
.row { display: flex; gap: 16px; }
.field { margin-bottom: 16px; flex: 1; }
.field label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 14px; }
input, select, textarea {
  width: 100%; padding: 12px;
  background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px; font-size: 15px;
  font-family: inherit;
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
#fbResult { margin: 4px 0 12px; font-size: 14px; min-height: 20px; }
#fbResult.ok { color: var(--ok); }
#fbResult.err { color: var(--err); }

.site-footer { border-top: 1px solid var(--border); padding: 24px 0 36px; color: var(--muted); font-size: 14px; }
.footer-top { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-top nav { display: flex; gap: 18px; }
.footer-top a { color: var(--muted); text-decoration: none; }
.footer-top a:hover { color: var(--text); }

/* Legal pages */
.legal { max-width: 780px; margin: 0 auto; padding: 40px 20px 80px; }
.legal h1 { font-size: 30px; }
.legal h2 { font-size: 20px; margin-top: 28px; color: var(--text); }
.legal p, .legal li { color: var(--muted); }
.legal a.back { color: var(--accent); text-decoration: none; }

@media (max-width: 640px) {
  .hero { padding: 60px 0 48px; }
  .hero h1 { font-size: 40px; }
  .row { flex-direction: column; gap: 0; }
  .nav nav a:not(.btn-ghost) { display: none; }
}