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

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #1f2937;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Form Section */
.form-section {
    display: block;
}

.form-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    margin-bottom: 30px;
}

.form-card h1 {
    font-size: 32px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 10px;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: #6b7280;
    margin-bottom: 30px;
    font-size: 16px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #374151;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 15px;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #6b7280;
    font-size: 12px;
}

.button-group {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.btn {
    flex: 1;
    min-width: 150px;
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #e5e7eb;
    color: #374151;
}

.btn-secondary:hover {
    background: #d1d5db;
    transform: translateY(-2px);
}

.btn-success {
    background: #10b981;
    color: white;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.4);
}

/* Preview Section */
.preview-section {
    display: block;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    background: white;
    padding: 20px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.preview-header h2 {
    font-size: 24px;
    color: #1f2937;
}

.btn-back {
    background: #6b7280;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-back:hover {
    background: #4b5563;
    transform: translateX(-3px);
}

.card-container {
    background: white;
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.btn-download, .btn-share, .btn-qr {
    padding: 15px 25px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.btn-download:hover, .btn-share:hover, .btn-qr:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.share-link-section, .qr-section {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.share-link-section h3, .qr-section h3 {
    margin-bottom: 15px;
    color: #1f2937;
}

.url-display {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.url-display input {
    flex: 1;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.btn-copy {
    padding: 12px 24px;
    background: #10b981;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-copy:hover {
    background: #059669;
    transform: scale(1.05);
}

.url-note {
    color: #6b7280;
    font-size: 14px;
    font-style: italic;
}

#qrcode {
    display: flex;
    justify-content: center;
    margin: 20px 0;
    padding: 20px;
    background: #f9fafb;
    border-radius: 10px;
}

.btn-download-qr {
    width: 100%;
    padding: 12px;
    background: #10b981;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    margin-top: 15px;
    transition: all 0.3s;
}

.btn-download-qr:hover {
    background: #059669;
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 768px) {
    .form-card {
        padding: 25px;
    }

    .button-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .preview-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }
}