/* Style dùng chung cho toàn bộ website Turn 2 */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f8fafc;
  color: #1e293b;
  margin: 0;
  line-height: 1.6;
}
header {
  background-color: #4338ca;
  color: #ffffff;
  padding: 20px 28px;
}
header h1 { margin: 0 0 6px; }
header p { margin: 0; opacity: 0.9; font-size: 14px; }

nav {
  background-color: #312e81;
  padding: 10px 20px;
}
nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
nav ul li {
  display: inline-block;
  margin-right: 10px;
  vertical-align: top;
}
nav a {
  display: block;
  color: #e0e7ff;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 4px;
}
nav a:hover {
  background-color: #ffffff;
  color: #4338ca;
}
nav a.active {
  background-color: rgba(255, 255, 255, 0.2);
  font-weight: bold;
}

main {
  max-width: 900px;
  margin: 24px auto;
  padding: 0 18px;
}

section, article {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

h2 {
  color: #4338ca;
  margin-top: 0;
  border-bottom: 2px solid #e0e7ff;
  padding-bottom: 8px;
}

h3, h4 {
  color: #312e81;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
}
th, td {
  padding: 10px 14px;
  border: 1px solid #cbd5e1;
  text-align: left;
}
thead th {
  background-color: #4338ca;
  color: #ffffff;
}
tbody tr:nth-child(even) {
  background-color: #f1f5f9;
}

pre.cay-thu-muc {
  background-color: #0f172a;
  color: #38bdf8;
  padding: 14px 18px;
  border-radius: 6px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 13px;
  overflow-x: auto;
}

a {
  color: #4338ca;
}
a:hover {
  text-decoration: underline;
}

footer {
  background-color: #0f172a;
  color: #94a3b8;
  text-align: center;
  padding: 18px;
  font-size: 13px;
  margin-top: 40px;
}
footer a {
  color: #38bdf8;
}