/* -----------------------
   Base & Global Styles
------------------------ */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: #fff;
  position: relative;
  min-height: 100vh;
  background: #000;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background: url("assets/bg.jpg") no-repeat center center fixed;
  background-size: cover;
  background-color: rgba(0, 0, 0, 0.4);
  background-blend-mode: darken;
}

/* -----------------------
   Header & Navigation
------------------------ */
header {
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2em;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 10px 0 0 0;
  display: flex;
  justify-content: center;
  gap: 20px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  padding: 8px 15px;
  border-radius: 4px;
  transition: background 0.3s, transform 0.3s;
}

nav ul li a:hover,
nav ul li a.active {
  background: #0073e6;
  transform: scale(1.05);
}

/* -----------------------
   Main Content Container
------------------------ */
main {
  background: rgba(0, 0, 0, 0.5);
  margin: 20px auto;
  padding: 40px;
  width: 80%;
  max-width: 1200px;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

main h2,
main h3 {
  font-size: 2em;
  margin-top: 0;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
}

main p {
  font-size: 1.2em;
  line-height: 1.6;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
  margin-bottom: 1em;
}

/* -----------------------
   Button Styling
------------------------ */
.btn {
  display: inline-block;
  padding: 12px 25px;
  background: linear-gradient(45deg, #28a745, #218838);
  color: #fff;
  font-weight: bold;
  text-decoration: none;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.btn:hover {
  transform: translateY(-3px);
  background: linear-gradient(45deg, #218838, #1e7e34);
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.3);
}

/* -----------------------
   Footer Styling
------------------------ */
footer {
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  text-align: center;
  padding: 15px;
}

/* -----------------------
   Responsive Design
------------------------ */
@media (max-width: 768px) {
  main {
    width: 90%;
    padding: 20px;
  }
  
  nav ul {
    flex-direction: column;
  }
}

/* -----------------------
   Tableau Section Styling
------------------------ */
.tableau-section {
  margin-top: 40px;
}

.tableau-container iframe {
  border: 2px solid #0073e6;
  border-radius: 8px;
}