:root {
  --bg: #0f0f0f;
  --surface: #171717;
  --surface-soft: #1f1f1f;
  --text: #f5f5f5;
  --muted: #b5b5b5;
  --accent: #7c3aed;
  --accent-strong: #6d28d9;
  --border: #2a2a2a;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, 92vw); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(15, 15, 15, 0.85); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.06em; }
.brand img { width: 36px; height: 36px; border-radius: 8px; }
.nav-links { display: flex; gap: 16px; color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.hero { padding: 88px 0 64px; text-align: center; }
.hero h1 { margin: 0; font-size: clamp(2rem, 6vw, 3.8rem); line-height: 1.12; }
.hero p { margin: 18px auto 0; max-width: 720px; color: var(--muted); font-size: clamp(1rem, 2.5vw, 1.2rem); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 12px; padding: 12px 20px; border: 1px solid transparent; font-weight: 600; transition: 160ms ease; cursor: pointer; }
.btn-primary { margin-top: 28px; background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-strong); transform: translateY(-1px); }
.btn-secondary { background: transparent; border-color: var(--border); color: var(--text); }
section { padding: 40px 0; }
.section-title { margin: 0 0 8px; font-size: clamp(1.4rem, 2.8vw, 2rem); }
.section-sub { margin: 0 0 20px; color: var(--muted); }
.grid-3, .grid-4 { display: grid; gap: 14px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { background: linear-gradient(180deg, var(--surface-soft), var(--surface)); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.card h3 { margin: 6px 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }
.icon-chip { width: 36px; height: 36px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; background: rgba(124, 58, 237, 0.2); border: 1px solid rgba(124, 58, 237, 0.35); }
.cta-block { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer { margin-top: 28px; border-top: 1px solid var(--border); padding: 22px 0 28px; color: var(--muted); font-size: 0.95rem; }
.site-footer a { color: #d8c3ff; }
.form-wrap { max-width: 760px; margin: 40px auto; }
.field { margin-bottom: 14px; }
label { display: block; margin-bottom: 6px; font-weight: 600; }
input, textarea { width: 100%; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; color: var(--text); padding: 11px 12px; font: inherit; }
textarea { min-height: 140px; resize: vertical; }
.message { margin-top: 14px; padding: 10px 12px; border-radius: 10px; display: none; }
.message.success { display: block; background: rgba(16, 185, 129, 0.15); border: 1px solid rgba(16, 185, 129, 0.4); color: #95f2c4; }
.message.error { display: block; background: rgba(239, 68, 68, 0.16); border: 1px solid rgba(239, 68, 68, 0.45); color: #fca5a5; }
.policy { max-width: 860px; margin: 40px auto; }
.policy h2 { margin-top: 24px; }
.policy p, .policy li { color: var(--muted); }
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .nav-links { gap: 10px; font-size: 0.92rem; }
  .brand span { display: none; }
  .grid-4 { grid-template-columns: 1fr; }
}