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

/* BODY */
body {
  font-family: 'Segoe UI', sans-serif;
  background: #f4f7fb;
  color: #333;
}

/* HEADER */
header {
  background: linear-gradient(135deg, #0f2027, #2c5364);
  color: #fff;
  text-align: center;
  padding: 30px 20px;
}

header h1 {
  font-size: 32px;
}

header p {
  opacity: 0.9;
}

/* NAVBAR */
nav {
  background: #111;
  padding: 14px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

nav a:hover {
  color: #00d4ff;
}

/* CONTAINER */
.container {
  max-width: 1100px;
  margin: 40px auto;
  background: #fff;
  padding: 35px;
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.08);
}

/* ARTICLE */
article h1 {
  font-size: 28px;
  margin-bottom: 15px;
}

article h2 {
  margin-top: 25px;
  color: #222;
}

article h3 {
  margin-top: 15px;
  color: #444;
}

p {
  margin: 12px 0;
  line-height: 1.8;
  font-size: 16px;
}

/* LISTS */
ul, ol {
  margin: 10px 0 10px 20px;
}

/* TABLE */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

th, td {
  border: 1px solid #ddd;
  padding: 10px;
  text-align: center;
}

th {
  background: #2c5364;
  color: white;
}

/* CARDS (More Articles) */
.articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.card {
  background: #f9fbfd;
  padding: 18px;
  border-radius: 10px;
  transition: all 0.3s ease;
  border: 1px solid #eee;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card h3 a {
  text-decoration: none;
  color: #007bff;
}

.card p {
  font-size: 14px;
  color: #555;
}

/* LINKS */
a {
  color: #007bff;
}

/* HR */
hr {
  margin: 30px 0;
  border: none;
  height: 1px;
  background: #ddd;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 20px;
  background: #111;
  color: white;
  margin-top: 40px;
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {

  header h1 {
    font-size: 24px;
  }

  .container {
    padding: 20px;
  }

  nav a {
    display: inline-block;
    margin: 8px;
  }

}