body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #0f172a;
  color: #ffffff;
}
.container {
  max-width: 960px;
  margin: auto;
  padding: 20px;
}
.header {
  background: #1e293b;
  padding: 20px 0;
}
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav a {
  color: #93c5fd;
  margin: 0 10px;
  text-decoration: none;
}
.hero {
  text-align: center;
  background: #334155;
  padding: 60px 20px;
}
.btn-primary {
  background: #10b981;
  color: white;
  padding: 10px 25px;
  border-radius: 5px;
  display: inline-block;
  text-decoration: none;
  font-weight: bold;
}
.section {
  padding: 40px 20px;
}
.section.dark {
  background: #1e293b;
}
input, textarea {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  border: none;
  border-radius: 5px;
}
button {
  background: #10b981;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
.footer {
  background: #0f172a;
  padding: 20px 0;
  text-align: center;
  font-size: 14px;
}
.footer-nav a {
  color: #60a5fa;
  margin: 0 10px;
  text-decoration: none;
}
details {
  margin-bottom: 15px;
}