html,
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Arial, sans-serif;
    background-color: #f8f9fa;
    color: #212529;
}

:root {
    --primary-color: #0D6EFD;
    --primary-hover: #0b5ed7;
    --light-bg: #f8f9fa;
}

.latex-bold {
    font-weight: bold;
}

.latex-italic {
    font-style: italic;
}


.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.navbar-brand {
    font-weight: 600;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85);
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 1);
}

.dropdown-menu {
    border-color: var(--primary-color);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.05);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--primary-color);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

hr {
    height: 2px;
    opacity: 1;
}

.card {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

footer {
    margin-top: auto;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.05);
}