body {
  font-family: 'Roboto', sans-serif;
  color: #e0e0e0;
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  background: linear-gradient(90deg, #0f3460, #1a1a2e);
  padding: 50px 20px;
  text-align: center;
  border-bottom: 2px solid #00d4ff;
}

.header-content h1 {
  margin: 0;
  font-size: 2.8em;
  color: #00d4ff;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.tagline {
  font-size: 1.2em;
  color: #b0c4de;
  margin: 10px 0 0;
}

nav {
  background: #0f3460;
  padding: 15px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
}

nav ul li {
  margin: 0 20px;
}

nav ul li a {
  color: #00d4ff;
  text-decoration: none;
  font-weight: 500;
  font-size: 1.1em;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: #00ffcc;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #00d4ff;
  font-size: 1.5em;
  cursor: pointer;
}

main {
  max-width: 1200px;
  margin: 30px auto;
  padding: 20px;
}

.card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: 10px;
  padding: 25px;
  margin-bottom: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

h2, h3 {
  color: #00d4ff;
}

h2 {
  font-size: 2em;
  margin-bottom: 15px;
}

h3 {
  font-size: 1.5em;
  margin-top: 20px;
}

p, ul {
  font-size: 1.1em;
  color: #b0c4de;
}

ul {
  list-style: disc;
  margin-left: 30px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: rgba(255, 255, 255, 0.05);
}

table th, table td {
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px;
  text-align: left;
  color: #b0c4de;
}

table th {
  background: #0f3460;
  color: #00d4ff;
  font-weight: 600;
}

a {
  color: #00ffcc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  background: #0f3460;
  color: #b0c4de;
  text-align: center;
  padding: 15px;
  position: sticky;
  bottom: 0;
  width: 100%;
  border-top: 1px solid #00d4ff;
}

footer a {
  color: #00ffcc;
}

/* Responsive Design */
@media (max-width: 768px) {
  nav ul {
    display: none;
    flex-direction: column;
    text-align: center;
  }

  nav ul.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
    position: absolute;
    top: 20px;
    right: 20px;
  }

  nav ul li {
    margin: 10px 0;
  }

  .header-content h1 {
    font-size: 2em;
  }

  .tagline {
    font-size: 1em;
  }
}