@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

body {
    font-family: 'Poppins', sans-serif;
}

.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0; 
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar-sticky {
    position: relative;
    top: 0;
    height: calc(100vh - 48px);
    padding-top: .5rem;
    overflow-x: hidden;
    overflow-y: auto; 
}

.course-title {
    font-size: 1.5rem;
    font-weight: 600;
}

#module-navigation .nav-link {
    font-weight: 400;
    color: #c7c7c7;
}

#module-navigation .nav-link:hover {
    color: #fff;
}

#module-navigation .nav-link.active {
    color: #fff;
    background-color: #007bff;
}

#module-navigation .sub-module {
    padding-left: 1.5rem;
}

#lock-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #212529;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.lock-screen-container {
    max-width: 400px;
    padding: 2rem;
    text-align: center;
}