:root {
    --dl-navy: #071631;
    --dl-blue: #1c00ff;
    --dl-red: #ff1900;
    --dl-cyan: #1538c2;
    --dl-sky: #dfe8ff;
    --dl-surface: rgba(255, 255, 255, 0.72);
    --dl-surface-strong: rgba(255, 255, 255, 0.84);
    --dl-border: rgba(143, 188, 255, 0.34);
    --dl-shadow: 0 20px 45px rgba(9, 23, 58, 0.18);
    --dl-radius: 22px;
}

body,
html {
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

body.nav-md,
body.nav-sm,
body.login {
    background:
        radial-gradient(circle at top left, rgba(255, 25, 0, 0.08), transparent 34%),
        radial-gradient(circle at top right, rgba(28, 0, 255, 0.2), transparent 36%),
        linear-gradient(160deg, #eff4ff 0%, #f7faff 45%, #eef3ff 100%);
    min-height: 100vh;
}

body .container.body .right_col,
.fn_header_global,
.nav_menu {
    background: transparent;
}

.left_col,
.nav_title {
    background:
        linear-gradient(180deg, rgba(28, 0, 255, 0.96) 0%, rgba(21, 56, 194, 0.92) 42%, rgba(7, 22, 49, 0.9) 100%);
}

.left_col {
    box-shadow: 20px 0 40px rgba(7, 22, 49, 0.12);
}

.navbar.nav_title {
    min-height: 96px;
    padding: 16px 18px;
}

.navbar.nav_title > a {
    align-items: center;
    display: flex;
    gap: 14px;
    min-height: 64px;
}

.navbar.nav_title > a span {
    color: #f8fbff;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.01em;
    line-height: 1.2;
    margin-top: 0 !important;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.navbar.nav_title > a .logo {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 18px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
    max-height: 62px;
    max-width: 62px !important;
    padding: 6px;
}

.nav_menu,
.fn_header_global .x_panel,
.x_panel,
.x_content.quick-link {
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.nav_menu {
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 22px;
    box-shadow: var(--dl-shadow);
    float: none;
    margin: 14px 14px 18px;
    overflow: visible;
    position: relative;
    width: calc(100% - 28px);
    z-index: 1200;
}

.main_container .top_nav {
    position: relative;
    z-index: 1200;
}

.nav_menu nav,
.top_nav .nav.navbar-nav,
.top_nav .nav.navbar-nav > li {
    position: relative;
    z-index: 1210;
}

.top_nav .dropdown-menu,
.navbar-nav .open .dropdown-menu {
    z-index: 1250;
}

.fn_header_global {
    position: relative;
    z-index: 20;
}

.fn_header_global .x_panel {
    overflow: visible;
}

.nav.toggle a,
.school-name,
.top_nav .navbar-right li > a,
.top_nav .navbar-left li > a {
    color: var(--dl-navy) !important;
}

.nav_menu .school-name,
.top_nav .nav.navbar-nav > li > a,
.top_nav .nav.navbar-nav > li > a .fa,
.top_nav .nav.navbar-nav > li > a span {
    color: #102546 !important;
}

.school-name {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.01em;
    padding-top: 18px;
}

.x_panel {
    background: var(--dl-surface);
    border: 1px solid var(--dl-border);
    border-radius: var(--dl-radius);
    box-shadow: var(--dl-shadow);
    overflow: hidden;
}

.x_title {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.12));
    border-bottom: 1px solid rgba(149, 188, 255, 0.22);
    padding: 18px 22px 12px;
}

.x_title h3,
.x_title .head-title,
.head-title {
    color: var(--dl-navy);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.x_title h3 small,
.head-title small {
    color: #4d678f;
    font-size: 15px;
    font-weight: 600;
}

.x_content {
    padding: 22px;
}

.quick-link,
.quick-link a {
    color: #35517e;
    font-weight: 600;
}

.nav.side-menu > li > a,
.nav.child_menu li a,
.top_nav .navbar-right li > a,
.top_nav .navbar-left li > a,
.btn,
.form-control,
.pagination > li > a,
.pagination > li > span,
table .btn-xs {
    transition: all 0.22s ease;
}

.nav.side-menu > li > a {
    border-radius: 16px;
    color: rgba(247, 251, 255, 0.9);
    font-size: 14px;
    font-weight: 600;
    margin: 4px 12px;
    padding: 13px 16px;
}

.nav.side-menu > li.current-page,
.nav.side-menu > li.active {
    border-right: 0;
}

.nav.side-menu > li.current-page > a,
.nav.side-menu > li.active > a,
.nav.side-menu > li > a:hover,
.nav.child_menu li.current-page a,
.nav.child_menu li a:hover {
    background: rgba(255, 255, 255, 0.12);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
    color: #fff !important;
}

.nav.child_menu {
    background: transparent;
}

.nav.child_menu li a {
    border-radius: 14px;
    color: rgba(228, 241, 255, 0.88);
    font-size: 13px;
    margin: 2px 18px 2px 22px;
    padding: 10px 14px;
}

.form-control,
select.form-control,
textarea.form-control {
    background: var(--dl-surface-strong);
    border: 1px solid rgba(143, 188, 255, 0.42);
    border-radius: 16px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
    color: #102546;
    font-size: 14px;
    min-height: 46px;
    padding: 10px 16px;
}

textarea.form-control {
    min-height: 110px;
}

.form-control:focus,
select.form-control:focus,
textarea.form-control:focus {
    border-color: rgba(30, 120, 255, 0.55);
    box-shadow: 0 0 0 4px rgba(30, 120, 255, 0.12);
}

.item.form-group label,
.control-label,
.form-group > div:first-child {
    color: #28446f;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.btn {
    border: 0;
    border-radius: 14px;
    box-shadow: 0 12px 24px rgba(30, 120, 255, 0.16);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.01em;
    padding: 10px 18px;
}

.btn-success,
.btn-primary,
.btn-info {
    background: linear-gradient(135deg, var(--dl-blue), var(--dl-cyan)) !important;
    color: #fff !important;
}

.btn-danger {
    background: linear-gradient(135deg, #f0556d, #ff8b76) !important;
    color: #fff !important;
}

.btn-default {
    background: rgba(255, 255, 255, 0.78);
    color: var(--dl-navy);
}

.btn:hover,
.btn:focus {
    transform: translateY(-1px);
}

.nav-tabs.bordered {
    border-bottom: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.nav-tabs.bordered > li {
    margin-bottom: 0;
}

.nav-tabs.bordered > li > a {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(143, 188, 255, 0.28);
    border-radius: 999px;
    color: #35517e;
    font-weight: 700;
    margin-right: 0;
    padding: 10px 18px;
}

.nav-tabs.bordered > li.active > a,
.nav-tabs.bordered > li > a:hover {
    background: linear-gradient(135deg, rgba(30, 120, 255, 0.15), rgba(27, 211, 198, 0.18));
    border-color: rgba(30, 120, 255, 0.22);
    color: var(--dl-navy);
}

table.table {
    border-collapse: separate;
    border-spacing: 0;
}

table.table thead th {
    background: rgba(233, 244, 255, 0.86);
    border-bottom: 1px solid rgba(143, 188, 255, 0.32) !important;
    color: #28446f;
    font-size: 13px;
    font-weight: 700;
}

table.table-striped > tbody > tr:nth-of-type(odd) {
    background: rgba(255, 255, 255, 0.42);
}

table.table-bordered > thead > tr > th,
table.table-bordered > tbody > tr > td {
    border-color: rgba(143, 188, 255, 0.22);
}

.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
    margin-left: 8px;
}

.dropdown-menu {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(143, 188, 255, 0.26);
    border-radius: 18px;
    box-shadow: var(--dl-shadow);
}

footer {
    background: transparent;
}

footer .pull-right,
footer .pull-left,
footer {
    color: #5a7196;
}

@media (max-width: 991px) {
    .nav_menu {
        margin: 10px;
    }

    .school-name {
        font-size: 18px;
        padding-top: 16px;
    }

    .x_title h3,
    .head-title {
        font-size: 20px;
    }
}