:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

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

.container-fluid {
    max-width: 1400px;
}

header h1 {
    color: white;
    font-weight: 300;
    margin-bottom: 0;
}

header p.lead {
    color: rgba(255, 255, 255, 0.8);
}

.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.card-header {
    background: linear-gradient(45deg, var(--primary-color), #0056b3);
    color: white;
    border-radius: 15px 15px 0 0;
    border: none;
}

.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.input-group-text {
    border-radius: 10px 0 0 10px;
    border: 2px solid #e9ecef;
    border-right: none;
    background-color: #f8f9fa;
}

.btn {
    border-radius: 10px;
    padding: 12px 24px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0056b3);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.4);
}

.btn-success {
    background: linear-gradient(45deg, var(--success-color), #1e7e34);
    border: none;
}

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

.progress {
    height: 8px;
    border-radius: 4px;
    background-color: #e9ecef;
}

.progress-bar {
    border-radius: 4px;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

#previewFrame {
    background: white;
    border-radius: 0 0 15px 15px;
    overflow: hidden;
}

footer {
    color: rgba(255, 255, 255, 0.7);
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.status-item {
    padding: 8px 0;
    border-bottom: 1px solid #e9ecef;
}

.status-item:last-child {
    border-bottom: none;
}

.status-item i {
    width: 20px;
    text-align: center;
    margin-right: 10px;
}

.text-success i {
    color: var(--success-color);
}

.text-warning i {
    color: var(--warning-color);
}

.text-info i {
    color: var(--info-color);
}

.text-danger i {
    color: var(--danger-color);
}