body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #000;
  color: white;
  overflow-x: hidden;
  position: relative;
}

/* Moving Bubbles Background */
.bubbles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
  z-index: 0;
  pointer-events: none;
}
.bubbles::before, .bubbles::after {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 2%, transparent 2%);
  background-size: 50px 50px;
  animation: moveBubbles 30s linear infinite;
}
.bubbles::after {
  animation-duration: 45s;
}
@keyframes moveBubbles {
  0% { transform: translate(0,0); }
  100% { transform: translate(-50%, -50%); }
}

/* Navigation */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  background: rgba(0,0,0,0.8);
  position: relative;
  z-index: 10;
}
.navbar .logo {
  font-size: 28px;
  font-weight: bold;
  display: flex;
  gap: 2px;
}
.rainbow {
  background: linear-gradient(45deg, red, orange, yellow, green, blue, indigo, violet);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.navbar .nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
}
.navbar .nav-links li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}
.hamburger {
  display: none;
  font-size: 28px;
  cursor: pointer;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 100px 20px;
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: 48px;
  margin-bottom: 20px;
}
.hero span {
  color: #ffdd00;
}
.hero p {
  font-size: 20px;
  margin-bottom: 30px;
}
.category-search {
  display: flex;
  justify-content: center;
  gap: 10px;
}
.category-search select, .category-search input {
  padding: 10px;
  border-radius: 5px;
  border: none;
}
.category-search button {
  padding: 10px 20px;
  background: #ffdd00;
  color: #000;
  border: none;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
}
.category-search button:hover { background: #e6c200; }

/* Container for Post Ad */
.container {
  max-width: 600px;
  margin: 50px auto;
  background: rgba(255,255,255,0.05);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(255,255,255,0.1);
  position: relative;
  z-index: 1;
}
.container h1 {
  text-align: center;
  margin-bottom: 20px;
}
.container label { display: block; margin-top: 15px; font-weight: bold; }
.container input, .container select, .container textarea {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border-radius: 5px;
  border: 1px solid #555;
  background: #111;
  color: white;
}
.container button {
  margin-top: 20px;
  width: 100%;
  padding: 12px;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
}
.container button:hover { background: #218838; }

/* Footer */
footer { background: #111; text-align: center; padding: 20px 0; color: #aaa; }

/* Responsive Hamburger Menu */
@media screen and (max-width:768px){
  .navbar .nav-links { 
    flex-direction: column; 
    display: none; 
    background: rgba(0,0,0,0.9);
    position: absolute;
    top: 60px;
    right: 0;
    width: 200px;
    border-radius: 0 0 0 10px;
  }
  .navbar .nav-links.show { display: flex; }
  .hamburger { display: block; }
}