/* Custom CSS for Usability Test Platform */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --border-radius: 0.5rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

/* Global Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
}

/* Navigation */
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: var(--box-shadow-lg);
}

.card-header {
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    border-bottom: none;
    font-weight: 600;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.1rem;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.15);
}

/* Question Blocks */
.question-block {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.question-block:hover {
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.question-title {
    color: var(--dark-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Form Controls */
.form-control {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-check-input {
    border-radius: 50%;
    border: 2px solid #dee2e6;
    transition: all 0.3s ease;
}

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

.form-check-input:focus {
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Scale Options */
.scale-container {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.scale-container:hover {
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.scale-options .form-check {
    margin: 0 0.5rem;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.scale-options .form-check:hover {
    background-color: var(--light-color);
}

.scale-options .form-check-label {
    font-weight: 600;
    min-width: 2.5rem;
    text-align: center;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.scale-options .form-check-input:checked + .form-check-label {
    background-color: var(--primary-color);
    color: white;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    color: #0c5460;
}

.alert-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    color: #856404;
}

/* Badges */
.badge {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
}

/* Footer */
footer {
    margin-top: auto;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .card-body {
        padding: 1rem;
    }
    
    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
    
    .scale-options .form-check {
        margin: 0 0.25rem;
    }
    
    .scale-options .form-check-label {
        min-width: 2rem;
        padding: 0.25rem;
    }
}

/* Print Styles */
@media print {
    .btn, .navbar, footer, .card-header {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
    
    .display-6 {
        font-size: 2rem !important;
        color: #000 !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
}

/* Custom Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
}

.bg-gradient-success {
    background: linear-gradient(135deg, var(--success-color), #146c43);
}

.bg-gradient-info {
    background: linear-gradient(135deg, var(--info-color), #0aa2c0);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Focus States */
.btn:focus,
.form-control:focus,
.form-check-input:focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Hover Effects */
.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg);
}

.btn-hover:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}