* {
    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;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
}

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

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

.form-container {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
}

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

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
    font-size: 0.95rem;
}

.input-group input[type="text"],
.input-group input[type="number"],
.input-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.input-group input[type="text"]:focus,
.input-group input[type="number"]:focus,
.input-group select:focus {
    outline: none;
    border-color: #667eea;
}

.input-group input[type="color"] {
    width: 100%;
    height: 45px;
    border: 2px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
}

button {
    padding: 14px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-right: 10px;
    margin-top: 10px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #28a745;
    color: white;
}

.btn-secondary:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.4);
}

.output-container {
    text-align: center;
}

.output-container h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.qr-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 15px;
    min-height: 400px;
}

#canvas {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

#image {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2rem;
    }

    .form-container {
        padding: 20px;
    }

    button {
        width: 100%;
        margin-right: 0;
    }
}