/* Custom styles for Bayesian Network Tutoring System */

:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #0dcaf0;
}

/* General */
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Navbar */
.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
}

/* Cards */
.card {
    border: none;
    border-radius: 0.5rem;
}

.card-header {
    background-color: white;
    border-bottom: 2px solid #f0f0f0;
    font-weight: 600;
}

/* Buttons */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Loading spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Form elements */
textarea.form-control {
    border-radius: 0.375rem;
}

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

/* Knowledge state indicators */
.knowledge-has {
    color: var(--success-color);
}

.knowledge-missing {
    color: var(--danger-color);
}

.knowledge-misconception {
    color: var(--warning-color);
}

.knowledge-unknown {
    color: var(--info-color);
}

/* Network visualization (placeholder for later) */
#network-canvas {
    border: 1px solid #dee2e6;
    border-radius: 0.5rem;
    background-color: #f8f9fa;
}

/* Chat interface (placeholder for later) */
.chat-container {
    height: 500px;
    overflow-y: auto;
    border: 1px solid #dee2e6;
    border-radius: 0.5rem;
    padding: 1rem;
    background-color: #f8f9fa;
}

.chat-message {
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.chat-message.tutor {
    background-color: #e7f3ff;
    margin-right: 3rem;
}

.chat-message.student {
    background-color: #fff3cd;
    margin-left: 3rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .display-4 {
        font-size: 2rem;
    }

    .lead {
        font-size: 1rem;
    }

    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
}