:root {
  --bg: #0b0f14;
  --panel: #111823;
  --text: #e6e8ec;
  --muted: #b8bec8;
  --primary: #4f46e5;
  --primary-700: #4338ca;
  --outline: #22324a;
  --card: #0f1622;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #0b0f14 0%, #0a0f17 100%);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(1100px, 92%); margin-inline: auto; }

.site-header {
  background: rgba(17,24,35,0.9);
  border-bottom: 1px solid var(--outline);
  position: sticky;
  top: 0;
  backdrop-filter: blur(6px);
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand { font-weight: 800; letter-spacing: 0.5px; font-size: 1.1rem; }
.brand-accent { color: var(--primary); }
.nav { display: flex; gap: 14px; align-items: center; }
.nav-link {
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--muted);
}
.nav-link:hover { color: var(--text); background: #0f1622; }
.nav-link.active { color: var(--text); }

.btn-primary {
  background: var(--primary);
  color: white !important;
  padding: 8px 14px;
  border-radius: 12px;
  font-weight: 600;
}
.btn-primary:hover { background: var(--primary-700); }
.btn-outline {
  border: 1px solid var(--outline);
  padding: 8px 14px;
  border-radius: 12px;
  color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: white; }

.hero {
  border-bottom: 1px solid var(--outline);
  background: radial-gradient(1200px 400px at 70% -50%, rgba(79,70,229,0.25), transparent 60%),
              linear-gradient(180deg, #0b0f14 0%, #0a0f17 100%);
}
.hero-inner {
  padding: 72px 0 48px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2rem, 3.8vw, 3rem);
  margin: 0 0 8px 0;
}
.lead {
  color: var(--muted);
  max-width: 720px;
  margin: 0 auto 18px;
}
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.features { padding: 40px 0 56px; }
.grid-3 {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.card {
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}
.card h3 { margin-top: 6px; margin-bottom: 6px; }
.card p { color: var(--muted); margin: 0; }

.site-footer {
  border-top: 1px solid var(--outline);
  background: #0b111a;
}
.footer-inner {
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.footer-inner small { color: var(--muted); }
.footer-nav { display: flex; gap: 8px; color: var(--muted); }
.footer-nav a:hover { color: var(--text); }

@media (max-width: 820px) {
  .grid-3 { grid-template-columns: 1fr; }
  .header-inner { gap: 10px; }
}
.grid-2 { display: grid; gap: 24px; grid-template-columns: 340px 1fr; }

.about { padding: 48px 0; }
.profile-card {
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 16px;
  padding: 18px;
  text-align: center;
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}
.profile-img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 12px;
  border: 1px solid var(--outline);
}
.profile-name { margin: 6px 0 2px; }
.muted { color: var(--muted); margin: 0; }

.about-header h1 { margin: 0 0 6px; }
.about-section { margin-top: 18px; }
.about-section h3 { margin: 0 0 6px; }

@media (max-width: 900px){
  .grid-2 { grid-template-columns: 1fr; }
}
.form-page { padding: 56px 0; }
.form-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}
.form-title { margin: 0 0 6px; text-align: center; }
.form-subtitle { margin: 0 0 18px; text-align: center; color: var(--muted); }

.form-group { display: grid; gap: 8px; margin-bottom: 14px; }
label { font-weight: 600; }
.input {
  width: 100%;
  background: #0c1320;
  color: var(--text);
  border: 1px solid var(--outline);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
}
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.25); }

.form-btn { width: 100%; margin-top: 6px; }
.form-error { color: #ff6b6b; margin: 10px 0 0; text-align: center; min-height: 1.2em; }