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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  background: white;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  padding: 40px;
  max-width: 600px;
  width: 100%;
}

h1 {
  color: #333;
  margin-bottom: 30px;
  text-align: center;
  font-size: 28px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: #555;
  font-weight: 500;
}

select, input[type="text"], input[type="password"], textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.3s;
}

select:focus, input:focus, textarea:focus {
  outline: none;
  border-color: #667eea;
}

textarea {
  resize: vertical;
  min-height: 100px;
  font-family: inherit;
}

.wifi-fields, .url-fields, .raw-fields {
  display: none;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.checkbox-group input[type="checkbox"] {
  width: auto;
}

.advanced-section {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 2px solid #f0f0f0;
}

.advanced-toggle {
  background: #f5f5f5;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  width: 100%;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s;
  color: #000;
}

.advanced-toggle:hover {
  background: #e8e8e8;
}

.advanced-content {
  display: none;
  margin-top: 20px;
}

.advanced-content.open {
  display: block;
}

.color-input-group {
  display: flex;
  gap: 10px;
  align-items: center;
}

input[type="color"] {
  width: 60px;
  height: 40px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  cursor: pointer;
}

.preview-section {
  margin-top: 30px;
  text-align: center;
}

#qrcode {
  display: inline-block;
  padding: 20px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.button-group {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  justify-content: center;
}

button {
  background: #667eea;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #5568d3;
}

button:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.arrow {
  transition: transform 0.3s;
}

.arrow.open {
  transform: rotate(180deg);
}