/* Main CSS for LaNet-vi Web Application */

:root {
    --primary-color: #0056b3;  /* Darker blue for better contrast */
    --secondary-color: #495057; /* Darker gray for better readability */
    --success-color: #1e7e34;  /* Darker green */
    --danger-color: #bd2130;   /* Darker red */
    --warning-color: #e0a800;  /* Darker yellow */
    --info-color: #138496;     /* Darker cyan */
    --light-color: #f8f9fa;
    --dark-color: #212529;     /* Darker for better contrast */
    
    /* New accessibility colors */
    --info-bg: #cce7f0;        /* Better contrast info background */
    --info-text: #004085;      /* Dark blue text for info */
    --success-bg: #d1e7dd;     /* Better contrast success background */
    --success-text: #0a3622;   /* Dark green text */
    --warning-bg: #fff3cd;     /* Better contrast warning background */
    --warning-text: #664d03;   /* Dark brown text */
    --danger-bg: #f8d7da;      /* Better contrast danger background */
    --danger-text: #58151c;    /* Dark red text */
    
    --border-radius: 0.5rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.2);
    
    --transition: all 0.3s ease;
}

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

.btn {
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
}

.card {
    border: none;
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
}

.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 1px solid #ced4da;
    transition: var(--transition);
}

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

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

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    transform: translateY(-1px);
}

/* Upload Area Animations */
.upload-area {
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(0, 123, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: var(--transition);
    opacity: 0;
}

.upload-area.dragover::before {
    opacity: 1;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

/* Progress Bars */
.progress {
    height: 0.75rem;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.progress-bar {
    transition: width 0.3s ease;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
}

/* Custom Range Sliders */
.form-range {
    height: 0.5rem;
    background: transparent;
    border-radius: var(--border-radius);
}

.form-range::-webkit-slider-track {
    height: 0.5rem;
    background: #dee2e6;
    border-radius: var(--border-radius);
}

.form-range::-webkit-slider-thumb {
    height: 1.25rem;
    width: 1.25rem;
    border-radius: 50%;
    background: var(--primary-color);
    border: 2px solid white;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--box-shadow-lg);
}

/* Visualization Preview */
.visualization-preview {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    transition: var(--transition);
}

.visualization-preview:hover {
    transform: scale(1.02);
}

/* Loading Animations */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

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

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

/* Alert Styles */
.alert {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info-text);
    border: 1px solid #9ec5fe;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid #a3cfbb;
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid #f1aeb5;
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning-text);
    border: 1px solid #ffecb5;
}

/* Sidebar Improvements */
.card {
    transition: var(--transition);
}

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

.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-outline-info:hover {
    transform: translateY(-1px);
}

/* Network Stats */
.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

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

.stat-label {
    font-weight: 500;
    color: var(--secondary-color);
}

.stat-value {
    font-weight: bold;
    color: #495057; /* Better contrast - medium-dark gray */
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
        text-align: center;
    }
    
    .hero-section .display-4 {
        font-size: 2rem;
    }
    
    .config-panel {
        padding: 1.5rem;
    }
    
    .feature-card {
        margin-bottom: 1rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #ffffff;
        --card-bg: #2d2d2d;
    }
    
    body {
        background-color: var(--bg-color);
        color: var(--text-color);
    }
    
    .card, .config-panel, .result-panel, .feature-card {
        background-color: var(--card-bg);
        color: var(--text-color);
    }
    
    .upload-area {
        background-color: var(--card-bg);
        border-color: #555;
        color: var(--text-color);
    }
}

/* Print Styles */
@media print {
    .navbar, .btn, .feature-card {
        display: none !important;
    }
    
    .hero-section {
        background: none !important;
        color: black !important;
    }
    
    .visualization-preview {
        max-width: 100% !important;
        page-break-inside: avoid;
    }
}