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


body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background-color: #f5f5f5;
  color: #333;
  scroll-behavior: smooth;
}

header {
  position: fixed;
  width: 100%;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(0,0,0,0.6);
  padding: 1rem 2rem;
  z-index: 1000;
  transition: background-color 0.3s ease;
}

header.scrolled {
  background-color: rgba(0, 0, 0, 0.9);
}

.logo {
  font-family: 'Orbitron', sans-serif;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

nav ul {
  display: flex;
  list-style: none;
}

nav li {
  margin-left: 2rem;
}

nav a {
  text-decoration: none;
  color: white;
  font-weight: bold;
  transition: color 0.3s ease;
}

nav a:hover {
  color: #ffcc00;
}


.hero {
  background-image: url('IMG/background/drone_1.jpg');
  background-size: cover;
  background-position: center;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.4);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3em;
  animation: fadeInDown 1s ease forwards;
}

@keyframes fadeInDown {
  0% { opacity: 0; transform: translateY(-20px); }
  100% { opacity: 1; transform: translateY(0); }
}

.intro {
  padding: 100px 10% 60px;
  background: white;
}

h2 {
  margin-top: 60px;
  color: #222;
  font-size: 2em;
}

p {
  font-size: 1.1em;
  line-height: 1.6;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  background-color: #fff;
  box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

th, td {
  border: 1px solid #ddd;
  padding: 12px;
  text-align: left;
}

th {
  background-color: #222;
  color: white;
}

tr:nth-child(even) {
  background-color: #f9f9f9;
}

.footer {
  text-align: center;
  padding: 3rem 0;
  background-color: #222;
}

.sources-btn {
  background-color: #ffcc00;
  border: none;
  padding: 1rem 2rem;
  font-size: 1rem;
  border-radius: 30px;
  cursor: pointer;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.sources-btn:hover {
  background-color: #e6b800;
}