:root {
  --bg: #0f1724;
  --card: #111827;
  --accent: #7c3aed;
  --muted: #9ca3af;
  --glass: rgba(255, 255, 255, 0.03);
  --radius: 12px;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  background: linear-gradient(180deg, #071024 0%, var(--bg) 100%);
  color: #e6eef8;
  -webkit-font-smoothing: antialiased;
}

header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(6px);
  background: linear-gradient(90deg, rgba(10, 12, 20, 0.6), rgba(10, 12, 20, 0.35));
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #4c1d95);
  display: inline-grid;
  place-items: center;
  font-weight: 800;
  color: white;
  box-shadow: 0 6px 18px rgba(124, 58, 237, 0.12);
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 14px;
  align-items: center;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

nav a:hover {
  color: #fff;
}

main {
  padding: 48px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 28px;
  align-items: stretch;
}

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 8px 30px rgba(2, 6, 23, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  color: #fff;
}

.lead {
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.6;
}

.cta-row {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  background: linear-gradient(90deg, var(--accent), #5b21b6);
  color: white;
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(92, 33, 182, 0.12);
}

.btn.secondary {
  background: transparent;
  color: var(--muted);
  border: 1px solid rgba(255, 255, 255, 0.04);
  box-shadow: none;
  font-weight: 600;
}

/* right column */
.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
}

/* features */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.feature {
  background: var(--glass);
  padding: 12px;
  border-radius: 10px;
  text-align: center;
}

.feature h3 {
  margin: 8px 0 0 0;
  font-size: 1rem;
}

.feature p {
  margin: 8px 0 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* responsive */
@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .features {
    grid-template-columns: 1fr;
  }

  nav ul {
    display: none;
  }

  .container {
    padding: 16px;
  }

  .logo {
    width: 40px;
    height: 40px;
  }
}

footer {
  margin-top: 40px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

@media (max-width: 800px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }
}