* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #f5f6fa;
  color: #333;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background: #111;
  color: #fff;
}

.navbar .logo {
  font-size: 24px;
  font-weight: bold;
}

.navbar nav a {
  color: #fff;
  text-decoration: none;
  margin: 0 15px;
}

.navbar nav a:hover {
  color: #00bcd4;
}

.sell-container {
  max-width: 600px;
  margin: 50px auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.1);
}

.sell-container h1 {
  text-align: center;
  margin-bottom: 20px;
}

form label {
  display: block;
  margin-top: 15px;
  font-weight: bold;
}

form input,
form textarea {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 16px;
}

form button {
  display: block;
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  font-size: 16px;
  cursor: pointer;
}

form button:hover {
  background-color: #0056b3;
}

.preview {
  margin-top: 30px;
  padding: 15px;
  background: #f1f1f1;
  border-radius: 8px;
}

.preview img {
  max-width: 100%;
  height: auto;
  border-radius: 5px;
}

.hidden {
  display: none;
}

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

footer a {
  color: #fff;
  margin: 0 10px;
  text-decoration: none;
}

footer a:hover {
  color: #00bcd4;
}