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

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

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

h1 {
    color: #333;
    text-align: center;
    margin-bottom: 10px;
    font-size: 2.5em;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    font-size: 1.1em;
}

.input-section {
    margin-bottom: 30px;
}

textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    resize: vertical;
    transition: border-color 0.3s;
    font-family: inherit;
}

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

.options {
    margin: 20px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.options label {
    color: #333;
    font-weight: 600;
}

select {
    padding: 10px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: border-color 0.3s;
}

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

button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
}

.qrcode-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    margin: 20px 0;
}

#qrcode {
    display: inline-block;
}

#qrcode img {
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.download-section {
    margin-top: 20px;
}

#downloadBtn {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

#downloadBtn:hover {
    box-shadow: 0 10px 20px rgba(17, 153, 142, 0.4);
}

@media (max-width: 600px) {
    .container {
        padding: 30px 20px;
    }
    
    h1 {
        font-size: 2em;
    }
}