:root {
    --portal-bg: #f3f6fb;
    --portal-surface: #ffffff;
    --portal-surface-soft: #f8fafc;
    --portal-border: #e2e8f0;
    --portal-text: #172033;
    --portal-muted: #64748b;
    --portal-primary: #0f766e;
    --portal-primary-strong: #115e59;
    --portal-accent: #2563eb;
    --portal-warning: #f59e0b;
    --portal-danger: #dc2626;
    --portal-success: #16a34a;
    --portal-sidebar: #101827;
    --portal-sidebar-2: #142235;
    --portal-shadow: 0 18px 45px rgba(15, 23, 42, .08);
}

* {
    letter-spacing: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--portal-bg) !important;
    color: var(--portal-text);
    font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif !important;
}

.wrapper,
.content-wrapper {
    background:
        radial-gradient(circle at top left, rgba(20, 184, 166, .08), transparent 30rem),
        linear-gradient(180deg, #f8fbff 0%, var(--portal-bg) 38%) !important;
}

.main-header.navbar {
    min-height: 70px;
    border: 0;
    border-bottom: 1px solid rgba(226, 232, 240, .9);
    background: rgba(255, 255, 255, .88) !important;
    backdrop-filter: blur(18px);
    box-shadow: 0 12px 28px rgba(15, 23, 42, .05);
}

.portal-topbar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.portal-kicker {
    margin: 0;
    color: var(--portal-muted);
    font-size: .78rem;
    font-weight: 700;
    text-transform: uppercase;
}

.portal-title {
    margin: 0;
    color: var(--portal-text);
    font-size: clamp(1.05rem, 1vw + .85rem, 1.45rem);
    font-weight: 800;
}

.portal-action {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    border: 1px solid var(--portal-border);
    border-radius: 999px;
    padding: .55rem .9rem;
    background: #fff;
    color: var(--portal-text);
    font-weight: 700;
}

.main-sidebar {
    border-right: 0;
    background:
        linear-gradient(180deg, rgba(20, 184, 166, .14), transparent 16rem),
        linear-gradient(180deg, var(--portal-sidebar), var(--portal-sidebar-2)) !important;
    box-shadow: 18px 0 45px rgba(15, 23, 42, .18);
}

.brand-link {
    min-height: 82px;
    border-bottom: 1px solid rgba(255, 255, 255, .08) !important;
}

.brand-link .brand-image,
.portal-brand-mark {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #14b8a6, #2563eb);
    color: #fff;
    box-shadow: 0 16px 32px rgba(37, 99, 235, .28);
}

.portal-brand-copy strong {
    display: block;
    color: #fff;
    font-size: .98rem;
    line-height: 1.1;
}

.portal-brand-copy span {
    display: block;
    color: #b6c3d1;
    font-size: .76rem;
    margin-top: .2rem;
}

.nav-sidebar {
    padding: .75rem .55rem 1.5rem;
}

.nav-sidebar .nav-item {
    line-height: 1.25 !important;
}

.nav-sidebar .nav-link {
    min-height: 42px;
    border-radius: 12px;
    margin: .12rem 0;
    color: #cbd5e1 !important;
    display: flex;
    align-items: center;
}

.nav-sidebar .nav-link p {
    white-space: normal;
    line-height: 1.2;
}

.nav-sidebar .nav-link:hover {
    background: rgba(255, 255, 255, .08) !important;
    color: #fff !important;
}

.nav-sidebar .nav-link.active {
    background: linear-gradient(135deg, rgba(20, 184, 166, .95), rgba(37, 99, 235, .95)) !important;
    color: #fff !important;
    box-shadow: 0 12px 26px rgba(20, 184, 166, .18);
}

.nav-treeview {
    margin-left: .25rem;
    padding-left: .65rem;
    border-left: 1px solid rgba(203, 213, 225, .16);
}

.content-wrapper {
    min-height: 100vh;
    padding-bottom: 2rem;
}

.container-fluid,
.portal-page {
    max-width: 1500px;
}

.card,
.section-card,
.stat-card,
.portal-card,
.table-responsive,
.dataTables_wrapper {
    border: 1px solid rgba(226, 232, 240, .86) !important;
    border-radius: 8px !important;
    background: var(--portal-surface) !important;
    box-shadow: var(--portal-shadow) !important;
}

.card-header {
    border-bottom: 1px solid var(--portal-border) !important;
    background: var(--portal-surface) !important;
    color: var(--portal-text) !important;
    font-weight: 800;
}

.card-title,
.box-title,
h1, h2, h3, h4, h5 {
    color: var(--portal-text);
}

.stat-card,
.portal-metric {
    position: relative;
    overflow: hidden;
}

.stat-card:after,
.portal-metric:after {
    content: "";
    position: absolute;
    inset: auto -2rem -3rem auto;
    width: 8rem;
    height: 8rem;
    border-radius: 999px;
    background: rgba(20, 184, 166, .08);
}

.icon-box,
.dash-icon,
.icon-circle {
    border-radius: 14px !important;
    box-shadow: 0 12px 24px rgba(15, 23, 42, .12);
}

.btn {
    border-radius: 8px !important;
    font-weight: 700;
}

.btn-primary,
.bg-primary {
    background: var(--portal-primary) !important;
    border-color: var(--portal-primary) !important;
}

.btn-success,
.bg-success {
    background: var(--portal-success) !important;
    border-color: var(--portal-success) !important;
}

.btn-warning,
.bg-warning {
    background: var(--portal-warning) !important;
    border-color: var(--portal-warning) !important;
}

.btn-danger,
.bg-danger {
    background: var(--portal-danger) !important;
    border-color: var(--portal-danger) !important;
}

.form-control,
.form-select,
select,
textarea,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="number"] {
    min-height: 42px;
    border: 1px solid var(--portal-border) !important;
    border-radius: 8px !important;
    background-color: #fff !important;
    color: var(--portal-text) !important;
    box-shadow: none !important;
}

.form-control:focus,
.form-select:focus,
select:focus,
textarea:focus,
input:focus {
    border-color: rgba(20, 184, 166, .75) !important;
    box-shadow: 0 0 0 .2rem rgba(20, 184, 166, .13) !important;
}

label {
    color: #334155;
    font-weight: 700;
}

.table {
    color: var(--portal-text);
    margin-bottom: 0;
}

.table thead th {
    border: 0 !important;
    background: #eef6f6;
    color: #334155;
    font-size: .78rem;
    text-transform: uppercase;
    white-space: nowrap;
}

.table td,
.table th {
    vertical-align: middle !important;
}

.badge {
    border-radius: 999px;
    padding: .45rem .7rem;
}

.main-footer {
    border: 0;
    background: transparent;
    color: var(--portal-muted);
}

.portal-shell {
    min-height: 100vh;
    padding: 1.25rem;
}

.portal-grid {
    display: grid;
    grid-template-columns: minmax(240px, 280px) 1fr;
    gap: 1.25rem;
    align-items: start;
}

.portal-sidebar {
    position: sticky;
    top: 1rem;
    height: calc(100vh - 2rem);
    overflow-y: auto;
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(20, 184, 166, .14), transparent 18rem),
        linear-gradient(180deg, var(--portal-sidebar), var(--portal-sidebar-2));
    color: #fff;
    box-shadow: var(--portal-shadow);
}

.portal-profile {
    padding: 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.portal-profile img {
    width: 76px;
    height: 76px;
    object-fit: cover;
    border: 3px solid rgba(255, 255, 255, .84);
}

.portal-nav {
    padding: .75rem;
}

.portal-nav a,
.student-sidebar .nav-link,
.staff-sidebar a {
    display: flex;
    align-items: center;
    gap: .75rem;
    width: 100%;
    min-height: 42px;
    margin: .18rem 0;
    padding: .7rem .85rem;
    border-radius: 8px !important;
    color: #dbe7f3 !important;
    text-decoration: none;
    font-weight: 700;
}

.portal-nav a:hover,
.student-sidebar .nav-link:hover,
.staff-sidebar a:hover {
    background: rgba(255, 255, 255, .08) !important;
    color: #fff !important;
}

.portal-nav a.active,
.student-sidebar .nav-link.active,
.staff-sidebar a.active {
    background: linear-gradient(135deg, #14b8a6, #2563eb) !important;
    color: #fff !important;
    box-shadow: 0 12px 26px rgba(20, 184, 166, .18);
}

.portal-main {
    min-width: 0;
}

.portal-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem 1.15rem;
    border: 1px solid var(--portal-border);
    border-radius: 8px;
    background: rgba(255, 255, 255, .9);
    box-shadow: var(--portal-shadow);
}

.portal-panel-header h4,
.portal-panel-header h5 {
    margin: 0;
    font-weight: 850;
}

.calendar-grid,
.attendance-grid {
    gap: .5rem !important;
}

.day-box {
    min-height: 58px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-radius: 8px !important;
}

@media (max-width: 991px) {
    .portal-shell {
        padding: .75rem;
    }

    .portal-grid {
        grid-template-columns: 1fr;
    }

    .portal-sidebar,
    .staff-sidebar,
    .student-sidebar {
        position: relative !important;
        top: auto !important;
        height: auto !important;
        max-height: none;
    }

    .portal-panel-header,
    .portal-topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .content-wrapper {
        margin-left: 0 !important;
    }
}

@media (max-width: 575px) {
    .portal-shell {
        padding: .5rem;
    }

    .card-body,
    .section-card,
    .stat-card {
        padding: 1rem !important;
    }

    .table-responsive {
        border-radius: 8px !important;
    }

    .portal-action {
        width: 100%;
        justify-content: center;
    }
}