/* Reset & global */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', Arial, sans-serif;
  line-height: 1.6;
  background-color: #f0f4f8;
  color: #222;
}

/* Header */
header {
  background-color: #ffffff;
  padding: 25px 20px;
  text-align: center;
  border-bottom: 3px solid #0d6efd;
  box-shadow: 0 3px 10px rgba(0,0,0,0.05);
}

header h1 {
  font-size: 2.2rem;
  color: #0d6efd;
  margin-bottom: 5px;
  font-weight: 700;
}

header p {
  color: #555;
  font-size: 1rem;
  font-weight: 400;
}

/* Navigation */
nav {
  display: flex;
  justify-content: center;
  margin-top: 15px;
  flex-wrap: wrap;
}

nav a {
  color: #0d6efd;
  margin: 0 15px;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s, scale 0.3s;
}

nav a:hover {
  color: #0a58ca;
  transform: scale(1.05);
}

/* Main sections */
main {
  max-width: 850px;
  margin: 30px auto;
  padding: 10px;
}

.card {
  background: #ffffff;
  border-left: 5px solid #0d6efd;
  border-radius: 8px;
  padding: 25px;
  margin-bottom: 25px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.05);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

h2 {
  font-size: 1.7rem;
  color: #0d6efd;
  margin-bottom: 15px;
  position: relative;
}

p, ul {
  font-size: 1rem;
  margin-bottom: 12px;
}

ul li {
  margin-bottom: 8px;
  padding-left: 18px;
  position: relative;
}

ul li::before {
  content: "➤";
  color: #0d6efd;
  position: absolute;
  left: 0;
}

/* Footer */
footer {
  background-color: #0d6efd;
  color: white;
  text-align: center;
  padding: 18px;
  font-size: 0.9rem;
  margin-top: 40px;
}

/* Buttons (optional) */
button {
  padding: 10px 20px;
  background-color: #0d6efd;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s, transform 0.3s;
}

button:hover {
  background-color: #0a58ca;
  transform: scale(1.05);
}

/* Responsive */
@media (max-width: 768px) {
  nav a {
    margin: 10px;
  }

  header h1 {
    font-size: 1.8rem;
  }

  .card {
    padding: 20px;
    margin: 15px;
  }
}