body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #1c1c1c;
  color: #e0e0e0;
  display: flex;
  justify-content: center;
  padding: 40px 20px;
  min-height: 100vh;
}

.container {
  background-color: #2a2a2a;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 25px rgba(255, 59, 63, 0.15);
  text-align: center;
  max-width: 650px;
  width: 100%;
}

h1 {
  color: #ff3b3f;
  margin-bottom: 10px;
}

input[type="text"] {
  padding: 10px;
  width: 90%;
  border-radius: 6px;
  border: 1px solid #444;
  background: #333;
  color: #fff;
  margin-bottom: 15px;
}

input[type="color"] {
  border: none;
  width: 40px;
  height: 40px;
  padding: 0;
  margin-right: 10px;
  border-radius: 6px;
  cursor: pointer;
  background: none;
}

input[type="text"]:focus,
select:focus {
  outline: 2px solid #ff3b3f;
}

select {
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #444;
  background-color: #333;
  color: #fff;
  width: 100%;
}

.button-row {
  margin: 15px 0;
}

button {
  padding: 10px 20px;
  background-color: #ff3b3f;
  color: #fff;
  border: none;
  border-radius: 6px;
  margin: 5px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background-color: #ff1f25;
}

.options-toggle {
  background: transparent;
  border: 1px solid #ff3b3f;
}

.options-toggle:hover {
  background-color: #ff3b3f;
  color: #fff;
}

.options {
  display: none;
  text-align: left;
  margin-top: 20px;
  background-color: #1a1a1a;
  padding: 20px;
  border-radius: 10px;
  border: 1px solid #333;
}

.options h2 {
  color: #ffaaaa;
  margin-bottom: 10px;
}

.option-group {
  margin-bottom: 15px;
}

.option-group label {
  display: block;
  font-weight: bold;
  margin-bottom: 5px;
}

.option-group input[type="text"] {
  width: calc(100% - 10px);
  margin-top: 5px;
}

#qrcode {
  margin-top: 30px;
  background-color: #fff;
  padding: 12px;
  border-radius: 10px;
  display: inline-block;
}

#qrcode:empty {
  display: none;
}

#download {
  display: none;
  margin-top: 20px;
  padding: 10px 20px;
  border: 1px solid #ff3b3f;
  color: #ff3b3f;
  border-radius: 6px;
  text-decoration: none;
  transition: 0.3s;
}

#download:hover {
  background-color: #ff3b3f;
  color: #fff;
}