*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #7c3aed;
  --primary-dark: #6d28d9;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-900: #111827;
  --green-500: #22c55e;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--gray-900);
  line-height: 1.6;
  background: #fff;
}
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ─── Header ─── */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}
header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo { font-weight: 700; font-size: 1.25rem; display: flex; align-items: center; gap: 8px; }
.logo svg { width: 28px; height: 28px; }
nav a {
  text-decoration: none; color: var(--gray-600); font-size: .9rem;
  margin-left: 24px; font-weight: 500;
}
nav a:hover { color: var(--gray-900); }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 8px; font-weight: 600;
  font-size: .95rem; text-decoration: none; cursor: pointer;
  border: none; transition: all .15s;
}
.btn-primary {
  background: var(--primary); color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-outline {
  border: 2px solid var(--gray-200); color: var(--gray-700); background: transparent;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: 10px; }

/* ─── Hero ─── */
.hero {
  padding: 100px 0 80px; text-align: center;
  background: linear-gradient(to bottom, var(--gray-50), #fff);
}
.hero h1 {
  font-size: 3rem; font-weight: 800; letter-spacing: -.02em;
  max-width: 720px; margin: 0 auto 16px; line-height: 1.2;
}
.hero h1 span { color: var(--primary); }
.hero p {
  font-size: 1.2rem; color: var(--gray-600);
  max-width: 560px; margin: 0 auto 32px;
}
.hero .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--gray-100); padding: 6px 16px; border-radius: 100px;
  font-size: .85rem; color: var(--gray-600); margin-bottom: 24px;
}
.hero .badge svg { width: 16px; height: 16px; }

/* ─── Demo / Screenshot ─── */
.demo {
  padding: 0 0 80px; text-align: center;
}
.demo img {
  max-width: 100%; border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,.12);
  border: 1px solid var(--gray-200);
}

/* ─── Features ─── */
.features {
  padding: 80px 0; background: var(--gray-50);
}
.features h2 {
  text-align: center; font-size: 2rem; font-weight: 700; margin-bottom: 48px;
}
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}
.feature-card {
  background: #fff; padding: 32px; border-radius: 12px;
  border: 1px solid var(--gray-200); text-align: center;
}
.feature-card .icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; font-size: 1.5rem;
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { font-size: .9rem; color: var(--gray-600); }

/* ─── Security ─── */
.security {
  padding: 64px 0; text-align: center;
}
.security .badge-group {
  display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; margin-top: 24px;
}
.security .badge-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--gray-50); padding: 12px 24px; border-radius: 8px;
  font-weight: 500; font-size: .95rem;
}

/* ─── CTA ─── */
.cta {
  padding: 80px 0; text-align: center;
  background: var(--gray-900); color: #fff;
}
.cta h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta p { color: #9ca3af; margin-bottom: 32px; max-width: 480px; margin-inline: auto; }
.cta .btn-primary { background: #fff; color: var(--gray-900); }
.cta .btn-primary:hover { background: var(--gray-100); }

/* ─── Footer ─── */
footer {
  padding: 32px 0; text-align: center; color: var(--gray-600);
  font-size: .85rem; border-top: 1px solid var(--gray-200);
}
footer a { color: var(--primary); text-decoration: none; }

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  nav a { margin-left: 16px; font-size: .85rem; }
  .btn-lg { padding: 14px 28px; font-size: 1rem; }
}