body {
  margin: 0;
  padding: 0;
  background-image: url('https://c4.wallpaperflare.com/wallpaper/227/507/781/steam-software-pc-master-race-gray-background-wallpaper-preview.jpg');
  background-size: cover;
  background-position: center;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #e0e0e0;
}
.container {
  background-color: rgba(20, 20, 20, 0.85);
  padding: 40px;
  max-width: 800px;
  margin: 100px auto;
  border-radius: 20px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.6);
  box-sizing: border-box;
}
h1 {
  text-align: center;
  margin-bottom: 30px;
  color: #ffcc00;
  font-size: 28px;
}
textarea, input, button {
  display: block;
  width: 100%;
  box-sizing: border-box;
}
textarea, input {
  padding: 15px;
  margin: 12px 0;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  background-color: #2c2c2c;
  color: #ffffff;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.5);
}
textarea::placeholder, input::placeholder {
  color: #bbbbbb;
}
a {
  font-size: 13px;
  color: #00ccff;
  display: inline-block;
  margin-bottom: 20px;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
button {
  padding: 15px;
  margin-top: 10px;
  font-size: 18px;
  background-color: #00b894;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
}
button:hover:not(:disabled) {
  background-color: #019875;
}
button:disabled {
  background-color: #555;
  cursor: not-allowed;
}
.popup {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  justify-content: center;
  align-items: center;
  z-index: 9999;
}
.popup-content {
  background-color: #1c1c1c;
  padding: 30px;
  border-radius: 15px;
  width: 80%;
  max-width: 700px;
  color: #f1f1f1;
  text-align: left;
}
.popup-content h2 {
  color: #ffcc00;
  margin-bottom: 15px;
}
.popup-content p {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 15px;
}
.checkboxes {
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 15px;
}
.checkboxes label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: #ddd;
}
.checkboxes input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: #00ccff;
  cursor: pointer;
}
.popup-content button {
  background-color: #00b894;
  color: white;
  padding: 12px 20px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: block;
  margin: 0 auto;
}