body {
    background: linear-gradient(to bottom, #e8efef, #f7f9fa);
    background-attachment: fixed;
}

@font-face {
    font-family: 'Roboto-Regular';
    src: url('../Roboto/Roboto-Regular.ttf') format('truetype');
    font-style: normal;
    font-weight: normal;
}

.visibil {
    display: block;
}
.invisibil {
    display: none;
}

.big-text {
    font-size: 3vh;
}

/* М’який фон навігації */
.bg-nav {
    background-color: #4a6fa5;
}

.visibil input {
    margin-right: 0.3em;
}

.sticky {
    position: fixed;
    top: 0;
    width: 100%;
}

.textLecture p {
    text-align: justify;
    text-indent: 1.5em;
    margin: 0;
}

.textLecture p a {
    text-align: left;
    text-indent: 1.5em;
    margin: 0;
}

.textLecture ol {
    margin: 0;
    padding: 0 0 0 1.5em;
}

.textLecture ol li,
.textLecture ul li {
    text-align: justify !important;
}

.textLecture p.rozdil {
    text-align: center;
    margin: 1em 0 1em 0;
}

/* Кнопка скролу */
div.scrollup {
    position: fixed;
    color: #f1f1e8;
    background-color: #6b8eae;
    right: 10px;
    bottom: 10px;
    padding: 4px 10px;
    font-size: 20px;
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
    cursor: pointer;
    display: none;
    text-align: center;
}

div.scrollup:hover {
    background-color: #4a6fa5;
}

/* Навбар — м’які кольори */
.navbar {
    background-color: #4a6fa5;
}

.navbar .navbar-brand {
    color: #f1f1e8;
}

.navbar .navbar-brand:hover,
.navbar .navbar-brand:focus {
    color: #79c99e;
}

.navbar .navbar-text {
    color: #f1f1e8;
}

.navbar .navbar-text a {
    color: #79c99e;
}

.navbar .navbar-text a:hover,
.navbar .navbar-text a:focus {
    color: #79c99e;
}

.navbar .navbar-nav .nav-link {
    color: #f1f1e8;
    border-radius: .25rem;
    margin: 0 0.25em;
}

.navbar .navbar-nav .nav-link:not(.disabled):hover,
.navbar .navbar-nav .nav-link:not(.disabled):focus {
    color: #79c99e;
}

.navbar .navbar-nav .nav-item.active .nav-link,
.navbar .navbar-nav .nav-item.show .nav-link {
    color: #79c99e;
    background-color: #4a6fa5;
}

.navbar .navbar-toggler {
    border-color: #4a6fa5;
}

.navbar .navbar-toggler:hover,
.navbar .navbar-toggler:focus {
    background-color: #4a6fa5;
}

.navbar .navbar-toggler .navbar-toggler-icon {
    color: #f1f1e8;
}

.navbar .navbar-collapse,
.navbar .navbar-form {
    border-color: #f1f1e8;
}

.navbar .navbar-link {
    color: #f1f1e8;
}

.navbar .navbar-link:hover {
    color: #79c99e;
}

/* Dropdown елементи */
@media (max-width: 575px),
(max-width: 767px),
(max-width: 991px),
(max-width: 1199px) {
    .navbar-nav .show .dropdown-menu .dropdown-item {
        color: #f1f1e8;
    }
    .navbar-nav .show .dropdown-menu .dropdown-item:hover,
    .navbar-nav .show .dropdown-menu .dropdown-item:focus {
        color: #79c99e;
    }
    .navbar-nav .show .dropdown-menu .dropdown-item.active {
        color: #79c99e;
        background-color: #4a6fa5;
    }
}

.navbar-expand .navbar-nav .show .dropdown-menu .dropdown-item {
    color: #f1f1e8;
}
.navbar-expand .navbar-nav .show .dropdown-menu .dropdown-item:hover,
.navbar-expand .navbar-nav .show .dropdown-menu .dropdown-item:focus {
    color: #79c99e;
}
.navbar-expand .navbar-nav .show .dropdown-menu .dropdown-item.active {
    color: #79c99e;
    background-color: #4a6fa5;
}