* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: radial-gradient(circle at top, #0f172a, #020617);
  color: #e5e7eb;
  line-height: 1.7;
}

header {
  padding: 70px 20px 40px;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  background: linear-gradient(90deg,#38bdf8,#a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  margin-top: 15px;
  color: #94a3b8;
}

nav {
  display: flex;
  justify-content: center;
  gap: 25px;
  padding: 15px;
  background: rgba(15,23,42,.7);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

nav a {
  text-decoration: none;
  color: #38bdf8;
  font-weight: 600;
  transition: .3s;
}

nav a:hover {
  color: #a855f7;
}

section {
  max-width: 1000px;
  margin: auto;
  padding: 60px 25px;
}

h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  border-left: 5px solid #38bdf8;
  padding-left: 15px;
}

.card {
  background: linear-gradient(135deg,#020617,#0f172a);
  border-radius: 16px;
  padding: 25px;
  margin-bottom: 20px;
  border: 1px solid rgba(56,189,248,.2);
  box-shadow: 0 0 30px rgba(56,189,248,.07);
}

.card h3 {
  color: #38bdf8;
  margin-bottom: 10px;
}

.card a {
  display: inline-block;
  margin-top: 10px;
  color: #a855f7;
  text-decoration: none;
  font-weight: 600;
}

.card a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 40px 20px;
  color: #94a3b8;
  font-size: .9rem;
}