/* ============================================================
   GCUF Library Portal – global UI enhancements
   ============================================================ */

:root {
    --gcuf-primary: #1e4d8c;
    --gcuf-primary-dark: #163a6b;
    --gcuf-primary-light: #2f6cb5;
    --gcuf-accent: #27ae60;
    --gcuf-bg: #eef2f7;
    --gcuf-surface: #ffffff;
    --gcuf-border: #dde4ee;
    --gcuf-text: #2c3e50;
    --gcuf-muted: #7f8c9b;
    --gcuf-shadow: 0 2px 12px rgba(30, 77, 140, 0.08);
    --gcuf-radius: 6px;
}

/* Base */
body {
    background-color: var(--gcuf-bg);
    color: var(--gcuf-text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

#page-wrapper {
    background-color: var(--gcuf-bg);
    padding-bottom: 20px;
}

.container-fluid {
    max-width: 100%;
}

/* Page headers */
.page-header {
    margin: 20px 0 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gcuf-border);
    color: var(--gcuf-primary-dark);
    font-weight: 600;
    font-size: 26px;
}

.page-header small {
    color: var(--gcuf-muted);
    font-size: 14px;
    font-weight: 400;
}

.page-subtitle {
    margin: -8px 0 20px;
    color: var(--gcuf-muted);
    font-size: 14px;
}

/* Navbar */
.navbar-default.navbar-static-top {
    background: linear-gradient(135deg, var(--gcuf-primary-dark) 0%, var(--gcuf-primary) 100%);
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.navbar-default .navbar-brand {
    color: #fff !important;
    font-weight: 600;
    letter-spacing: 0.3px;
    padding-top: 12px;
    padding-bottom: 12px;
}

.navbar-default .navbar-brand img {
    margin-right: 6px;
    border-radius: 3px;
}

.navbar-default .navbar-toggle {
    border-color: rgba(255, 255, 255, 0.4);
}

.navbar-default .navbar-toggle .icon-bar {
    background-color: #fff;
}

.navbar-default .navbar-top-links > li > a {
    color: rgba(255, 255, 255, 0.9);
}

.navbar-default .navbar-top-links > li > a:hover,
.navbar-default .navbar-top-links > li > a:focus {
    background-color: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.navbar-user-name {
    font-weight: 500;
    margin-right: 4px;
}

/* Sidebar */
.sidebar {
    background: var(--gcuf-surface);
    border-right: 1px solid var(--gcuf-border);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.04);
}

.sidebar .nav > li > a {
    color: var(--gcuf-text);
    font-weight: 500;
    padding: 12px 18px;
    transition: background 0.2s, color 0.2s;
}

.sidebar .nav > li > a:hover,
.sidebar .nav > li > a:focus {
    background-color: #f0f5fb;
    color: var(--gcuf-primary);
}

.sidebar .nav > li.active > a,
.sidebar .nav > li > a.active {
    background-color: #e8f0fa;
    color: var(--gcuf-primary);
    border-left: 3px solid var(--gcuf-primary);
    padding-left: 15px;
}

.sidebar .nav-second-level > li > a {
    padding-left: 42px;
    font-size: 13px;
}

.sidebar .nav-second-level > li > a.active {
    color: var(--gcuf-primary);
    font-weight: 600;
}

.sidebar-search .custom-search-form .form-control {
    border-radius: var(--gcuf-radius) 0 0 var(--gcuf-radius);
    border-color: var(--gcuf-border);
}

.sidebar-search .custom-search-form .btn {
    border-radius: 0 var(--gcuf-radius) var(--gcuf-radius) 0;
    border-color: var(--gcuf-border);
}

/* Panels */
.portal-panel,
.add-book-panel {
    border-color: var(--gcuf-border);
    border-radius: var(--gcuf-radius);
    box-shadow: var(--gcuf-shadow);
    margin-bottom: 20px;
    overflow: hidden;
}

.portal-panel > .panel-heading,
.add-book-panel > .panel-heading {
    background: linear-gradient(135deg, var(--gcuf-primary-dark) 0%, var(--gcuf-primary) 100%);
    border-color: var(--gcuf-primary);
    color: #fff;
    padding: 12px 18px;
}

.portal-panel > .panel-heading .panel-title,
.add-book-panel > .panel-heading .panel-title {
    font-size: 16px;
    font-weight: 600;
}

.portal-panel > .panel-body {
    background: var(--gcuf-surface);
    padding: 20px;
}

/* Search filter panel */
.search-panel .panel-body {
    padding: 18px 20px 14px;
}

.search-panel .form-inline .form-group {
    margin-right: 12px;
    margin-bottom: 10px;
    vertical-align: top;
}

.search-panel label.filter-col {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
    color: var(--gcuf-text);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.search-panel .form-control {
    min-width: 180px;
}

.search-panel .purchase-date-filter .form-control {
    min-width: 130px;
}

.search-panel .btn-info {
    background-color: var(--gcuf-primary);
    border-color: var(--gcuf-primary-dark);
    font-weight: 600;
    padding: 7px 22px;
    margin-top: 22px;
}

.search-panel .btn-info:hover,
.search-panel .btn-info:focus {
    background-color: var(--gcuf-primary-dark);
    border-color: var(--gcuf-primary-dark);
}

/* Results toolbar */
.results-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: var(--gcuf-surface);
    border: 1px solid var(--gcuf-border);
    border-radius: var(--gcuf-radius);
    box-shadow: var(--gcuf-shadow);
}

.results-toolbar .results-count {
    font-size: 14px;
    color: var(--gcuf-text);
    margin: 0;
}

.results-toolbar .results-count strong {
    color: var(--gcuf-primary);
}

.results-toolbar .results-actions .btn {
    margin-left: 6px;
}

.results-toolbar .results-actions .btn-primary {
    background-color: var(--gcuf-primary);
    border-color: var(--gcuf-primary-dark);
}

.results-toolbar .results-actions .btn-primary:hover {
    background-color: var(--gcuf-primary-dark);
}

/* Tables */
.table-responsive {
    border: 1px solid var(--gcuf-border);
    border-radius: var(--gcuf-radius);
    background: var(--gcuf-surface);
    box-shadow: var(--gcuf-shadow);
}

.portal-table,
.table.table-striped,
.table.table-bordered {
    margin-bottom: 0;
}

.portal-table > thead > tr > th,
.table.table-striped > thead > tr > th,
.table.table-bordered > thead > tr > th {
    background: linear-gradient(180deg, #f4f7fb 0%, #e9eef5 100%);
    color: var(--gcuf-primary-dark);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-bottom: 2px solid var(--gcuf-border) !important;
    white-space: nowrap;
    vertical-align: middle;
}

.portal-table > tbody > tr > td,
.table.table-striped > tbody > tr > td {
    vertical-align: middle;
    font-size: 13px;
}

.portal-table > tbody > tr:hover,
.table.table-striped > tbody > tr:hover {
    background-color: #f7fafd;
}

.portal-table a {
    color: var(--gcuf-primary);
    font-weight: 500;
}

.portal-table a:hover {
    color: var(--gcuf-primary-dark);
    text-decoration: underline;
}

/* Forms */
form .error {
    color: #e74c3c;
    font-size: 12px;
    margin-top: 5px;
    display: block;
}

.form-control {
    border-color: var(--gcuf-border);
    border-radius: var(--gcuf-radius);
    box-shadow: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    border-color: var(--gcuf-primary-light);
    box-shadow: 0 0 0 3px rgba(47, 108, 181, 0.15);
}

.form-group label {
    font-weight: 600;
    color: #555;
}

.btn-success {
    background-color: var(--gcuf-accent);
    border-color: #219653;
}

.btn-success:hover,
.btn-success:focus {
    background-color: #219653;
    border-color: #1e8449;
}

/* Add Book form (extends portal panel) */
.add-book-panel {
    border-color: var(--gcuf-primary-light);
}

.add-book-panel .form-section-title {
    margin: 0 0 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--gcuf-border);
    color: var(--gcuf-primary);
    font-size: 15px;
    font-weight: 600;
}

.add-book-panel .form-group {
    margin-bottom: 12px;
}

.add-book-panel .help-block {
    margin-bottom: 0;
    font-size: 11px;
    color: var(--gcuf-muted);
}

.add-book-panel .form-divider {
    margin: 20px 0;
    border-color: var(--gcuf-border);
}

.add-book-panel input[readonly] {
    background-color: #f9f9f9;
    cursor: not-allowed;
}

.add-book-panel .btn-success.btn-lg {
    min-width: 140px;
}

.text-danger {
    color: #e74c3c;
}

/* Dashboard stat cards */
.dashboard-stats a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.dashboard-stats .panel {
    border-radius: var(--gcuf-radius);
    box-shadow: var(--gcuf-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
}

.dashboard-stats .panel:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(30, 77, 140, 0.15);
}

.dashboard-stats .panel-heading {
    padding: 18px 15px;
}

.dashboard-stats .huge {
    font-size: 32px;
    font-weight: 700;
}

/* Pagination */
.pagination > li > a,
.pagination > li > span {
    color: var(--gcuf-primary);
    border-color: var(--gcuf-border);
}

.pagination > .active > a,
.pagination > .active > span,
.pagination > .active > a:hover,
.pagination > .active > span:hover {
    background-color: var(--gcuf-primary);
    border-color: var(--gcuf-primary);
}

.pagination-wrap {
    margin-top: 16px;
    padding: 10px 0;
    color: var(--gcuf-muted);
    font-size: 13px;
}

/* Alerts / notifications */
#alert-dismiss {
    margin-top: 10px;
}

#alert-dismiss .alert {
    border-radius: var(--gcuf-radius);
    border: none;
    box-shadow: var(--gcuf-shadow);
}

/* Login page */
body.login-page {
    background: linear-gradient(135deg, var(--gcuf-primary-dark) 0%, var(--gcuf-primary) 50%, #3a7bc8 100%);
    min-height: 100vh;
}

.login-page .login-wrapper {
    padding-top: 8vh;
    padding-bottom: 40px;
}

.login-page .login-panel {
    border: none;
    border-radius: var(--gcuf-radius);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.login-page .login-panel .panel-heading {
    background: var(--gcuf-surface);
    border-bottom: 1px solid var(--gcuf-border);
    text-align: center;
    padding: 24px 20px 16px;
}

.login-page .login-logo {
    width: 64px;
    margin-bottom: 10px;
}

.login-page .login-panel .panel-title {
    color: var(--gcuf-primary-dark);
    font-size: 20px;
    font-weight: 600;
}

.login-page .login-panel .panel-subtitle {
    color: var(--gcuf-muted);
    font-size: 13px;
    margin-top: 4px;
}

.login-page .login-panel .panel-body {
    padding: 24px 28px 28px;
}

.login-page .form-control {
    height: 42px;
}

.login-page .btn-success {
    height: 42px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

/* Footer */
.portal-footer {
    margin-top: 10px;
    padding-top: 12px;
    border-top: 1px solid var(--gcuf-border);
}

.portal-footer p {
    margin: 0;
    font-size: 12px;
    color: var(--gcuf-muted);
}

/* Circulation pages (Issue / Return) */
.circulation-panel .panel-body {
    padding: 22px;
}

.circulation-panel .form-section-title {
    margin: 0 0 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--gcuf-border);
    color: var(--gcuf-primary);
    font-size: 14px;
    font-weight: 600;
}

.circulation-panel .info-card {
    background: #f8fafc;
    border: 1px solid var(--gcuf-border);
    border-radius: var(--gcuf-radius);
    padding: 14px 16px;
    min-height: 180px;
    margin-bottom: 10px;
}

.circulation-panel .info-card-empty {
    color: var(--gcuf-muted);
    font-size: 13px;
    padding: 30px 10px;
    text-align: center;
}

.circulation-panel .table-book-information,
.circulation-panel .table-user-information {
    margin-bottom: 0;
    background: transparent;
}

.circulation-panel .table-book-information td,
.circulation-panel .table-user-information td,
.circulation-panel .table-user-information th {
    border-top: 1px solid #e8edf3 !important;
    font-size: 13px;
    vertical-align: middle;
}

.circulation-panel .table-book-information td:first-child,
.circulation-panel .table-user-information td:first-child {
    width: 38%;
    color: var(--gcuf-muted);
    font-weight: 600;
}

.circulation-panel .action-bar {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--gcuf-border);
}

.circulation-panel .member-photo {
    border-radius: var(--gcuf-radius);
    border: 1px solid var(--gcuf-border);
    box-shadow: var(--gcuf-shadow);
}

.circulation-panel #issueBook,
.circulation-panel input[name="returnBook"] {
    min-width: 140px;
    font-weight: 600;
}

.circulation-panel #bookAjax h3,
.circulation-panel #memberAjax h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--gcuf-primary);
    margin: 0 0 10px;
}

.circulation-panel #bookAjax .col-md-6 {
    padding: 0 12px;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--gcuf-muted);
    background: var(--gcuf-surface);
    border: 1px dashed var(--gcuf-border);
    border-radius: var(--gcuf-radius);
}

.empty-state i {
    font-size: 36px;
    margin-bottom: 12px;
    color: #bdc3c7;
}

/* Responsive tweaks */
@media (max-width: 767px) {
    .page-header {
        font-size: 22px;
    }

    .results-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .search-panel .form-control {
        min-width: 100%;
        width: 100%;
    }

    .search-panel .btn-info {
        margin-top: 0;
        width: 100%;
    }
}

.table td:nth-child(n) {
    /*border-top: none !important;*/
}