/* ============================================================
   Brand Tokens
   ============================================================ */
:root {
    /* LEAD brand palette — v3.0 */
    --lead-navy:      #003B73; /* LEAD Navy */
    --lead-navy-dark: #002d5a; /* LEAD Navy — hover states */
    --lead-teal:      #00A6A6; /* LEAD Teal */
    --burnt-orange:   #D55E00; /* Burnt Orange */

    /* Neutrals */
    --policy-slate:        #2F3A45; /* Policy Slate */
    --color-text-disabled: #aaaaaa;
    --line-gray:           #D9DEE5; /* Line Gray */
    --color-input-border:  #9bb4c4;

    /* Backgrounds */
    --light-gray-bg: #EEF2F6; /* Light Gray BG */

    /* Non-standard — header & footer background */
    --color-brand-dark: #092940;

    /* Focus-ring shadows */
    --shadow-focus-navy: 0 0 0 0.2rem rgba(0, 59, 115, 0.35);
    --shadow-focus-teal: 0 0 0 0.2rem rgba(0, 166, 166, 0.3);
}

/* ============================================================
   Universal
   ============================================================ */
* {
    font-family: 'Aptos', 'Century Gothic', sans-serif;
}

h1 {
    color: var(--lead-navy);
    font-weight: bold;
}

h2, h3 {
    color: var(--lead-navy);
}

p {
    margin-top: 0;
    margin-bottom: 0;
}

/* ============================================================
   Skip Link (WCAG 2.4.1)
   ============================================================ */
.skip-link {
    position: absolute;
    top: -48px;
    left: 0;
    background: var(--lead-navy);
    color: #ffffff;
    padding: 10px 18px;
    z-index: 10000;
    text-decoration: none;
    border-radius: 0 0 6px 0;
    font-size: 14px;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
    color: #ffffff;
    outline: 3px solid var(--burnt-orange);
    outline-offset: 2px;
}

/* ============================================================
   Header
   ============================================================ */
#header {
    position: sticky;
    top: 0;
    z-index: 997;
    background: var(--color-brand-dark);
    height: 70px;
    transition: box-shadow 0.3s;
}

.hover-link:hover {
    color: var(--lead-teal) !important;
    transition: color 0.3s ease;
}

#header.header-scrolled {
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
}

#header .logo img {
    max-height: 40px;
}

/* ============================================================
   Mobile Filter Button
   ============================================================ */
.btn-filter-mobile {
    background-color: var(--lead-navy);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    padding: 8px 18px;
    font-size: 14px;
    font-weight: 600;
}

.btn-filter-mobile:hover,
.btn-filter-mobile:focus {
    background-color: var(--lead-navy-dark);
    color: #ffffff;
    outline: 3px solid var(--lead-teal);
    outline-offset: 2px;
}

.btn-filter-mobile .badge {
    background-color: var(--burnt-orange);
    font-size: 11px;
}

/* ============================================================
   Offcanvas (Mobile Sidebar)
   ============================================================ */
#filterOffcanvas .offcanvas-header {
    background-color: var(--lead-navy);
}

#filterOffcanvas .offcanvas-title {
    color: #ffffff;
    font-weight: bold;
}

#filterOffcanvas .offcanvas-body .form-check {
    margin-bottom: 10px;
}

#filterOffcanvas .offcanvas-body .form-check-label {
    font-size: 14px;
    cursor: pointer;
}

#filterOffcanvas .offcanvas-body .form-check-input {
    cursor: pointer;
}

#filterOffcanvas .offcanvas-body .form-check-input:checked {
    background-color: var(--lead-navy);
    border-color: var(--lead-navy);
}

#filterOffcanvas .offcanvas-body .form-check-input:focus {
    box-shadow: var(--shadow-focus-navy);
    border-color: var(--lead-teal);
}

/* ============================================================
   Page Wrapper & Main Container
   ============================================================ */
#pageWrapper {
    min-height: calc(100vh - 70px - 140px);
}

#mainContainer {
    max-width: 1400px;
    margin: 0 auto;
    padding: 28px 20px 56px;
}

@media (min-width: 992px) {
    #mainContainer {
        padding-left: 40px;
        padding-right: 40px;
    }
}

/* ============================================================
   Page Title
   ============================================================ */
.page-title-row {
    margin-bottom: 28px;
}

.page-description {
    color: var(--policy-slate);
    font-size: 16px;
    max-width: 820px;
    margin-top: 8px;
    line-height: 1.5;
}

/* PDF download link — below page description */
.btn-pdf-download {
    display: inline-flex;
    align-items: center;
    margin-top: 16px;
    color: var(--lead-navy);
    border: 1px solid var(--lead-navy);
    border-radius: 4px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s;
}

.btn-pdf-download:hover {
    background-color: var(--lead-navy);
    color: #ffffff;
}

.btn-pdf-download:focus {
    outline: 3px solid var(--lead-teal);
    outline-offset: 2px;
    color: var(--lead-navy);
}

/* ============================================================
   Desktop Sidebar
   ============================================================ */
.sidebar-panel {
    background: var(--light-gray-bg);
    border: 1px solid var(--line-gray);
    border-left: 4px solid var(--lead-teal);
    border-radius: 8px;
    padding: 20px;
    top: 82px; /* offset below sticky header */
    z-index: 100; /* stay below sticky header (z-index: 997) */
}

.sidebar-heading {
    font-size: 15px;
    font-weight: bold;
    color: var(--lead-navy);
    margin-bottom: 16px;
}

.sidebar-panel .form-check {
    margin-bottom: 10px;
}

.sidebar-panel .form-check-label {
    font-size: 13px;
    color: var(--policy-slate);
    cursor: pointer;
    line-height: 1.4;
}

.sidebar-panel .form-check-input {
    cursor: pointer;
    margin-top: 0.15em;
}

.subject-info-icon {
    color: var(--lead-teal);
    font-size: 12px;
    opacity: 0.8;
    cursor: pointer;
    flex-shrink: 0;
}

.subject-info-icon:hover,
.subject-info-icon:focus {
    opacity: 1;
    outline: none;
}

.sidebar-panel .form-check-input:checked {
    background-color: var(--lead-navy);
    border-color: var(--lead-navy);
}

.sidebar-panel .form-check-input:focus {
    box-shadow: var(--shadow-focus-navy);
    border-color: var(--lead-teal);
}

.btn-apply-mobile {
    background-color: var(--lead-navy);
    color: #ffffff;
    border: none;
    font-size: 13px;
}

.btn-apply-mobile:hover,
.btn-apply-mobile:focus {
    background-color: var(--lead-navy-dark);
    color: #ffffff;
    outline: 3px solid var(--lead-teal);
    outline-offset: 2px;
}

.btn-clear-filters {
    color: var(--lead-navy);
    border-color: var(--lead-navy);
    font-size: 13px;
    transition: background-color 0.2s, color 0.2s;
}

.btn-clear-filters:hover,
.btn-clear-filters:focus {
    background-color: var(--lead-navy);
    color: #ffffff;
    border-color: var(--lead-navy);
}

.btn-clear-filters:focus {
    outline: 3px solid var(--lead-teal);
    outline-offset: 2px;
}

.sidebar-loading {
    color: var(--policy-slate);
}

/* ============================================================
   Search Box
   ============================================================ */
.search-container {
    background: var(--light-gray-bg);
    border: 1px solid var(--line-gray);
    border-top: 4px solid var(--lead-teal);
    border-radius: 8px;
    padding: 16px 20px;
}

.search-label {
    font-weight: bold;
    color: var(--lead-navy);
    font-size: 15px;
    margin-bottom: 8px;
    display: block;
}

.search-input-wrapper {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    border: 1px solid var(--color-input-border);
    border-radius: 4px;
    padding: 6px 10px;
    background: #ffffff;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.search-input-wrapper:focus-within {
    border-color: var(--lead-teal);
    box-shadow: var(--shadow-focus-teal);
}

.search-input {
    flex: 1;
    min-width: 120px;
    border: none;
    outline: none;
    padding: 4px 2px;
    font-size: 14px;
    background: transparent;
}

.search-input:focus {
    outline: none;
    box-shadow: none;
}

/* Clear button inside native search input */
.search-input::-webkit-search-cancel-button {
    cursor: pointer;
}

.form-text {
    color: var(--policy-slate);
    font-size: 12px;
    margin-top: 6px;
}

/* ============================================================
   Active Filter Chips
   ============================================================ */
.filter-chip {
    display: inline-flex;
    align-items: center;
    background-color: var(--light-gray-bg);
    border: 1px solid var(--lead-navy);
    color: var(--lead-navy);
    border-radius: 20px;
    padding: 3px 10px 3px 12px;
    font-size: 12px;
    font-weight: 600;
    margin-right: 5px;
    vertical-align: middle;
}

.filter-chip-remove {
    background: none;
    border: none;
    padding: 0 0 0 6px;
    color: var(--lead-navy);
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    opacity: 0.7;
    transition: opacity 0.15s, color 0.15s;
}

.filter-chip-remove:hover {
    color: var(--burnt-orange);
    opacity: 1;
}

.filter-chip-remove:focus {
    outline: 2px solid var(--lead-teal);
    outline-offset: 1px;
    border-radius: 2px;
}


/* ============================================================
   Results Info
   ============================================================ */
.results-info {
    font-size: 13px;
    color: var(--policy-slate);
    font-style: italic;
}

/* ============================================================
   Loading Overlay
   ============================================================ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    text-align: center;
}

.loading-spinner .spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3rem;
    color: var(--lead-teal);
}

.loading-spinner p {
    color: var(--lead-navy);
    font-weight: 600;
    font-size: 1.2rem;
}

/* ============================================================
   DataTable
   ============================================================ */
#table-container .table-responsive {
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--line-gray);
}

.research-manual-table {
    font-size: 14px;
    margin-bottom: 0 !important;
    width: 100% !important;
}

/* ID selector (specificity 0,1,0,0) beats DataTables' table.dataTable (0,0,1,1) !important */
#research-table {
    margin-top: 0 !important;
}

.research-manual-table thead th,
#research-table thead th {
    background-color: var(--lead-navy) !important;
    color: #ffffff !important;
    font-weight: 600;
    font-size: 13px;
    white-space: nowrap;
    border-bottom: 2px solid var(--lead-navy-dark) !important;
    padding: 12px 14px;
}


.research-manual-table tbody tr {
    border-bottom: 1px solid var(--line-gray);
}

.research-manual-table tbody tr:hover {
    background-color: var(--light-gray-bg);
}

.research-manual-table tbody td {
    vertical-align: top;
    padding: 11px 14px;
    line-height: 1.5;
}

/* Source column */
.source-link {
    color: var(--lead-navy);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: baseline;
    gap: 4px;
}

.source-link:hover {
    color: var(--lead-navy-dark);
    text-decoration: underline;
}

.source-link:focus {
    outline: 3px solid var(--lead-teal);
    outline-offset: 2px;
    border-radius: 3px;
    color: var(--lead-navy-dark);
}

.external-icon {
    font-size: 10px;
    opacity: 0.65;
    flex-shrink: 0;
}

/* Description column */
.research-manual-table td:nth-child(2) {
    color: var(--policy-slate);
    font-size: 13px;
}

/* Vendor column */
.research-manual-table td:nth-child(3) {
    color: var(--policy-slate);
    font-size: 13px;
}

/* ============================================================
   Custom Page-Length Control
   ============================================================ */
.page-length-label {
    font-size: 13px;
    color: var(--policy-slate);
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: default;
}

.page-length-select {
    border: 1px solid var(--color-input-border);
    border-radius: 4px;
    padding: 4px 28px 4px 8px;
    font-size: 13px;
    color: var(--policy-slate);
    background-color: #ffffff;
    cursor: pointer;
}

.page-length-select:focus {
    border-color: var(--lead-teal);
    box-shadow: var(--shadow-focus-teal);
    outline: none;
}

/* DataTables / Bootstrap 5 control overrides
   Scoped to #table-container so selectors work regardless of
   whether DataTables uses .dataTables_wrapper (v1) or .dt-container (v2). */
#table-container {
    font-size: 13px;
}

/* Footer row: info + pagination — visually connected to table bottom */
#table-container .row.mt-3 {
    margin-top: 0 !important;
    border-top: 1px solid var(--line-gray);
    background-color: var(--light-gray-bg);
    padding: 4px 0;
}

/* Info text ("Showing 1–25 of 217 resources") */
#table-container .dataTables_info,
#table-container .dt-info {
    color: var(--policy-slate);
    padding: 10px 14px;
}

/* Pagination wrapper */
#table-container .dataTables_paginate,
#table-container .dt-paging {
    padding: 6px 14px;
}

/* All page buttons */
#table-container .page-link {
    color: var(--lead-navy) !important;
    border-radius: 4px !important;
    padding: 7px 12px !important;
    min-width: 36px;
    text-align: center;
}

/* Hover */
#table-container .page-link:hover {
    background-color: var(--lead-teal) !important;
    border-color: var(--lead-teal) !important;
    color: #ffffff !important;
}

/* Active page */
#table-container .page-item.active .page-link {
    background-color: var(--lead-navy) !important;
    border-color: var(--lead-navy) !important;
    color: #ffffff !important;
    font-weight: bold;
}

/* Disabled buttons */
#table-container .page-item.disabled .page-link {
    color: var(--color-text-disabled) !important;
    background-color: transparent !important;
    border-color: var(--line-gray) !important;
}

/* Focus ring */
#table-container .page-link:focus {
    outline: 3px solid var(--lead-teal) !important;
    outline-offset: 2px;
    box-shadow: none !important;
}

/* Empty/no-results row */
.dataTables_empty,
.dt-empty {
    text-align: center;
    padding: 32px !important;
    color: var(--policy-slate);
    font-style: italic;
}

/* ============================================================
   Footer
   ============================================================ */
#footer {
    background: var(--color-brand-dark);
    color: #ffffff;
    font-size: 14px;
    text-align: center;
    padding: 20px 0;
}

#footer a {
    color: #ffffff;
}

#footer p {
    text-align: center;
}

.footer-link:hover {
    color: var(--lead-teal) !important;
    text-decoration: underline;
}

/* ============================================================
   Back to Top
   ============================================================ */
.back-to-top {
    position: fixed;
    visibility: hidden;
    opacity: 0;
    right: 18px;
    bottom: 18px;
    z-index: 996;
    background: var(--lead-navy);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    transition: opacity 0.3s, visibility 0.3s, background-color 0.2s;
    color: #ffffff;
    text-decoration: none;
    font-size: 26px;
}

.back-to-top.active {
    visibility: visible;
    opacity: 1;
}

.back-to-top:hover {
    background: var(--lead-teal);
    color: #ffffff;
}

.back-to-top:focus {
    outline: 3px solid var(--lead-teal);
    outline-offset: 3px;
    color: #ffffff;
}

/* ============================================================
   Responsive Adjustments
   ============================================================ */
@media (max-width: 767px) {
    #mainContainer {
        padding: 16px 14px 40px;
    }

    .research-manual-table thead th,
    .research-manual-table tbody td {
        font-size: 12px;
        padding: 9px 10px;
    }

    .page-description {
        font-size: 14px;
    }

    /* Force table to fit viewport; content wraps within fixed column widths */
    .research-manual-table {
        table-layout: fixed;
        width: 100% !important;
    }

    .research-manual-table th:nth-child(1),
    .research-manual-table td:nth-child(1) { width: 32%; }

    .research-manual-table th:nth-child(2),
    .research-manual-table td:nth-child(2) { width: 43%; }

    .research-manual-table th:nth-child(3),
    .research-manual-table td:nth-child(3) { width: 25%; }
}

@media (max-width: 575px) {
    .dataTables_wrapper .dataTables_paginate {
        text-align: center;
    }
}