:root {
  --bg: #0b0f1a;
  --card: #11182a;
  --muted: #94a3b8;
  --text: #e2e8f0;
  --accent: #7c3aed;
  --accent-2: #22d3ee;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1000px 600px at 20% -10%, rgba(124,58,237,.3), transparent),
              radial-gradient(800px 400px at 80% 10%, rgba(34,211,238,.25), transparent), var(--bg);
  color: var(--text);
}

.container {
  width: min(1100px, 92%);
  margin: 40px auto;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  position: sticky;
  top: 0;
  background: rgba(11,15,26,.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  z-index: 50;
}
.navbar a { padding: 8px 10px; border-radius: 8px; }
.navbar a:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }
.brand {
  font-weight: 800;
  letter-spacing: .5px;
  text-decoration: none;
  color: var(--text);
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  padding: 0;
  margin: 0;
}
.nav-links a, .cart {
  color: var(--text);
  text-decoration: none;
  opacity: .9;
}
.nav-links a:hover, .cart:hover { opacity: 1; }

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: center;
}
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.panel {
  padding: 28px;
}
.title-xl {
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.05;
  margin: 0;
}
.muted { color: var(--muted); }
.cta {
  display: inline-block;
  margin-top: 18px;
  padding: 12px 18px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: white;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
}
.cta:active { transform: translateY(1px); }
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 18px;
}
.features-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.testimonials-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.logos {
  display: grid;
  grid-template-columns: repeat(5, minmax(0,1fr));
  gap: 16px;
  align-items: center;
  opacity: .8;
}
.logos img { width: 100%; max-width: 120px; margin: 0 auto; filter: grayscale(1); opacity: .8; }
.logos img:hover { opacity: 1; }
.product-card { overflow: hidden; }
.product-card img { width: 100%; display: block; }
.footer { text-align: center; padding: 40px 0; color: var(--muted); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
  .features-grid, .testimonials-grid { grid-template-columns: 1fr; }
  .logos { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .navbar { padding: 12px 16px; }
  .nav-links { gap: 10px; }
  body { font-size: 16px; }
  .panel { padding: 22px; }
  .cta { padding: 12px 16px; }
}

/* Simple hover lift */
.product-card { transition: transform .25s ease, box-shadow .25s ease; }
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,.35);
}

/* Headings */
h1, h2, h3 { margin: 0 0 8px 0; }
h1 { font-size: clamp(28px, 4.8vw, 38px); }
h2 { font-size: clamp(22px, 4vw, 28px); }
h3 { font-size: clamp(18px, 3vw, 22px); }

/* Alerts */
.alert { padding: 12px 14px; border-radius: 8px; border: 1px solid transparent; font-size: 14px; }
.alert--error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert--warn { background: #fffbeb; border-color: #fde68a; color: #92400e; }