* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.navigation {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e0e0e0;
}

.nav-link {
    text-decoration: none;
    color: #4CAF50;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: #f0f0f0;
}

.nav-link.active {
    background-color: #4CAF50;
    color: white;
}

body {
    background-color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 500px;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 2rem;
}

.input-section {
    margin-bottom: 2rem;
}

.text-option {
    margin: 1rem 0;
}

.toggle-container {
    display: flex;
    align-items: center;
    margin-top: 0.5rem;
}

.toggle {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    margin-right: 10px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #4CAF50;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.toggle-label {
    color: #666;
    font-size: 0.9rem;
}

input {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus {
    outline: none;
    border-color: #4CAF50;
}

button {
    width: 100%;
    padding: 0.8rem;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #45a049;
}

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

.qr-section {
    text-align: center;
}

#qr-result {
    margin: 1.5rem 0;
    padding: 1rem;
    border-radius: 5px;
}

#qr-code {
    max-width: 100%;
    height: auto;
}

#download-btn {
    background-color: #2196F3;
}

#download-btn:hover {
    background-color: #1976D2;
}