/* ==========================================================================
   Public site theme
   --------------------------------------------------------------------------
   A calm neutral palette with a deep green accent: the page sits on "paper",
   raised surfaces (cards, the header, panels) lift off it, and text is drawn
   from one ink ramp. Loaded after Bootstrap and custom.css, and only by
   layouts/public-app — the admin panel is untouched.

   The three display modes are the body classes custom.js already toggles
   (dark-mode / light-mode / gray-mode). Each one only redefines the tokens;
   every rule below reads the tokens, so nothing else is mode-specific.
   ========================================================================== */

body {
    --paper: #e9ebed;
    --surface: #f7f8f9;
    --ink-50: #eceef0;
    --ink-100: #dde1e4;
    --ink-200: #c4cace;
    --ink-300: #8a9197;
    --ink-400: #6b7176;
    --ink-500: #565b5f;
    --ink-600: #44484b;
    --ink-700: #36393c;
    --ink-800: #232527;
    --ink-900: #151617;

    --accent: #1a4d3e;
    --accent-hover: #163e33;
    --accent-text: #1a4d3e;
    --accent-soft: #eef6f2;
    --accent-soft-border: #aad3c2;
    --accent-ring: #d5e9e0;
    --on-accent: #ffffff;

    --mark-bg: #efdcab;
    --mark-text: #151617;

    --radius-panel: 16px;
    --shadow-panel: 0 1px 2px rgb(24 25 26 / 0.05), 0 12px 32px -12px rgb(24 25 26 / 0.14);
    --shadow-float: 0 8px 40px -8px rgb(24 25 26 / 0.22);
}

/* Soft charcoal, not pure black */
body.dark-mode {
    --paper: #191817;
    --surface: #232120;
    --ink-50: #201f1d;
    --ink-100: #2e2c2a;
    --ink-200: #3d3a37;
    --ink-300: #57534e;
    --ink-400: #8b857d;
    --ink-500: #a8a29a;
    --ink-600: #c3bdb5;
    --ink-700: #d8d3cb;
    --ink-800: #e9e5de;
    --ink-900: #f6f3ee;

    --accent: #2f8d6a;
    --accent-hover: #359973;
    --accent-text: #a7dcc2;
    --accent-soft: #16281f;
    --accent-soft-border: #264b37;
    --accent-ring: #1b3527;

    --mark-bg: #7a5c28;
    --mark-text: #f6f3ee;

    --shadow-panel: 0 1px 2px rgb(0 0 0 / 0.4), 0 12px 32px -12px rgb(0 0 0 / 0.6);
    --shadow-float: 0 8px 40px -8px rgb(0 0 0 / 0.7);
}

/* Declared after dark: custom.js leaves dark-mode on <body> when switching
   dark -> gray, so gray has to win when both classes are present. */
body.gray-mode {
    --paper: #959ca2;
    --surface: #a5acb2;
    --ink-50: #9ba2a9;
    --ink-100: #8d949b;
    --ink-200: #767d84;
    --ink-300: #545b61;
    --ink-400: #3a4147;
    --ink-500: #30363b;
    --ink-600: #272c30;
    --ink-700: #1f2327;
    --ink-800: #15181a;
    --ink-900: #0c0e0f;

    --accent: #154839;
    --accent-hover: #113a2e;
    --accent-text: #0c2a21;
    --accent-soft: #93a59f;
    --accent-soft-border: #5d7a70;
    --accent-ring: #8ea39c;

    --mark-bg: #efdcab;
    --mark-text: #0c0e0f;

    --shadow-panel: 0 1px 2px rgb(12 14 15 / 0.10), 0 12px 32px -12px rgb(12 14 15 / 0.26);
    --shadow-float: 0 8px 40px -8px rgb(12 14 15 / 0.34);
}

/* --- Page ----------------------------------------------------------------- */

body,
body.dark-mode,
body.light-mode,
body.gray-mode {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    color: var(--ink-800);
    background-color: var(--paper);
    background-image: none;
    -webkit-font-smoothing: antialiased;
}

/* A faint wash of the accent behind the top of every page */
main {
    flex: 1;
    background-image: linear-gradient(to bottom, var(--accent-soft), transparent 360px);
}

a {
    color: var(--accent-text);
}
a:hover {
    color: var(--accent-text);
    text-decoration: underline;
}

hr,
hr.border-info {
    height: 1px;
    color: var(--ink-100);
    background-color: var(--ink-100);
    border: 0 !important;
    opacity: 1;
}

/* --- Header --------------------------------------------------------------- */

.site-header {
    padding: 0;
    background-color: color-mix(in srgb, var(--paper) 85%, transparent);
    border-bottom: 1px solid var(--ink-100);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    z-index: 1030;
}
.site-header-inner {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    min-height: 64px;
}
.site-brand {
    display: flex;
    flex: none;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: bold;
    color: var(--ink-900);
    text-decoration: none;
}
.site-brand:hover {
    color: var(--ink-900);
    text-decoration: none;
}
.site-brand img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 12px;
}
.site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.site-nav .nav-link {
    padding: 6px 12px;
    font-size: 14px;
    color: var(--ink-600);
    white-space: nowrap;
    border-radius: 999px;
    transition: color 0.15s, background-color 0.15s;
}
.site-nav .nav-link:hover {
    color: var(--accent-text);
    text-decoration: none;
    background-color: var(--accent-soft);
}
.site-header-tools {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-inline-start: auto;
}

/* The two header controls share one pill shape */
#languageMenuBtn,
#display-menu-btn {
    height: 36px;
    padding: 0 12px;
    font-size: 13px;
    font-weight: normal;
    line-height: 1;
    color: var(--ink-600) !important;
    background-color: var(--surface) !important;
    border: 1px solid var(--ink-200) !important;
    border-radius: 999px;
    box-shadow: none;
    transition: border-color 0.15s, color 0.15s;
}
#languageMenuBtn:hover,
#display-menu-btn:hover,
#display-menu-btn.show {
    color: var(--accent-text) !important;
    border-color: var(--accent-soft-border) !important;
}
#languageMenuBtn:focus,
#display-menu-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--accent-ring);
}

@media (max-width: 575px) {
    .site-brand-name {
        display: none;
    }
    .site-header-inner {
        gap: 6px;
    }
    .site-nav .nav-link {
        padding: 6px 8px;
        font-size: 13px;
    }
}

/* --- Display panel: same tokens as the rest of the page -------------------- */

body .display-panel {
    --dp-bg: var(--surface);
    --dp-text: var(--ink-800);
    --dp-muted: var(--ink-400);
    --dp-border: var(--ink-200);
    --dp-accent: var(--accent-text);
    --dp-accent-bg: var(--accent-soft);
    margin-top: 8px;
    border-color: var(--ink-100);
    box-shadow: var(--shadow-float);
}
/* The swatches show the page colour each mode actually uses */
.display-swatch-dark  { background-color: #191817; }
.display-swatch-light { background-color: #e9ebed; }
.display-swatch-gray  { background-color: #959ca2; }
.display-size-steps button.filled {
    background-color: var(--accent);
}

/* --- Buttons -------------------------------------------------------------- */

main .btn {
    border-radius: 999px;
    padding-inline: 18px;
    font-size: 0.9rem;
    box-shadow: none;
}
main .btn-sm {
    padding-inline: 14px;
    font-size: 0.8rem;
}
main .btn:focus {
    box-shadow: 0 0 0 3px var(--accent-ring);
}

main .btn-success,
main .btn-primary,
main .btn-outline-success {
    color: var(--on-accent);
    background-color: var(--accent);
    border-color: var(--accent);
}
main .btn-success:hover,
main .btn-primary:hover,
main .btn-outline-success:hover,
main .btn-success:focus,
main .btn-primary:focus,
main .btn-outline-success:focus,
main .btn-success:active,
main .btn-primary:active {
    color: var(--on-accent);
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}
main .btn-success:disabled,
main .btn-success.disabled {
    color: var(--on-accent);
    background-color: var(--accent);
    border-color: var(--accent);
    opacity: 0.45;
}

main .btn-secondary,
main .btn-outline-primary,
main .btn-outline-info,
main .btn-outline-secondary {
    color: var(--ink-700);
    background-color: var(--surface);
    border-color: var(--ink-200);
}
main .btn-secondary:hover,
main .btn-outline-primary:hover,
main .btn-outline-info:hover,
main .btn-outline-secondary:hover,
main .btn-secondary:focus,
main .btn-outline-primary:focus,
main .btn-outline-info:focus {
    color: var(--accent-text);
    background-color: var(--surface);
    border-color: var(--accent-soft-border);
}

/* --- Form controls -------------------------------------------------------- */

main .form-control,
main .form-control-sm,
main .form-select,
main .dataTables_wrapper input,
main .dataTables_wrapper select {
    font-size: 1rem;
    color: var(--ink-800) !important;
    background-color: var(--surface);
    border: 1px solid var(--ink-200);
    border-radius: 12px;
}
main .form-control::placeholder,
main .dataTables_wrapper input::placeholder {
    color: var(--ink-400);
}
main .form-control:focus,
main .form-control-sm:focus,
main .dataTables_wrapper input:focus,
main .dataTables_wrapper select:focus {
    color: var(--ink-800);
    background-color: var(--surface);
    border-color: var(--accent-soft-border);
    outline: none;
    box-shadow: 0 0 0 3px var(--accent-ring);
}
main .form-check-input {
    background-color: var(--surface);
    border-color: var(--ink-300);
}
main .form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}
main .form-check-input:focus {
    border-color: var(--accent-soft-border);
    box-shadow: 0 0 0 3px var(--accent-ring);
}

/* bootstrap-select: the closed control and its menu */
main .bootstrap-select > .dropdown-toggle,
main .bootstrap-select > .dropdown-toggle.bs-placeholder {
    padding-inline: 14px;
    font-size: 0.95rem;
    color: var(--ink-700);
    background-color: var(--surface);
    border: 1px solid var(--ink-200);
    border-radius: 12px;
}
main .bootstrap-select > .dropdown-toggle.bs-placeholder,
main .bootstrap-select > .dropdown-toggle.bs-placeholder:hover {
    color: var(--ink-400);
}
main .bootstrap-select > .dropdown-toggle:hover,
main .bootstrap-select > .dropdown-toggle:focus {
    color: var(--ink-800);
    background-color: var(--surface);
    border-color: var(--accent-soft-border);
    outline: none !important;
    box-shadow: 0 0 0 3px var(--accent-ring);
}
main .dropdown-menu {
    color: var(--ink-800);
    background-color: var(--surface);
    border: 1px solid var(--ink-100);
    border-radius: 12px;
    box-shadow: var(--shadow-float);
}
main .dropdown-menu .dropdown-item {
    color: var(--ink-700);
}
main .dropdown-menu .dropdown-item:hover,
main .dropdown-menu .dropdown-item:focus,
main .dropdown-menu .dropdown-item.active,
main .dropdown-menu .dropdown-item.selected {
    color: var(--accent-text);
    background-color: var(--accent-soft);
}
main .bootstrap-select .no-results {
    color: var(--ink-500);
    background-color: transparent;
}

/* --- Home: hero image and the search card --------------------------------- */

.search-hero-image,
.download-hero-image {
    border-radius: var(--radius-panel) !important;
    box-shadow: var(--shadow-panel);
}

body #search-keywords {
    padding: 0 0 20px !important;
    overflow: visible;
    color: var(--ink-800) !important;
    background-color: var(--surface) !important;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-panel);
    box-shadow: var(--shadow-panel);
}
#search-keywords .nav-tabs {
    padding-inline: 12px !important;
    border-bottom: 1px solid var(--ink-100);
}
#search-keywords .nav-tabs .nav-link {
    margin-bottom: -1px;
    padding: 14px 16px;
    font-size: 0.95rem;
    color: var(--ink-500);
    background: none;
    border: 0;
    border-bottom: 2px solid transparent;
    border-radius: 0;
}
#search-keywords .nav-tabs .nav-link:hover {
    color: var(--accent-text);
}
#search-keywords .nav-tabs .nav-link.active {
    font-weight: bold;
    color: var(--accent-text);
    border-bottom-color: var(--accent);
}
#search-keywords .tab-pane {
    font-size: 0.95rem;
    color: var(--ink-700);
}
#search-keywords #keywords {
    height: 48px;
    padding-inline: 20px;
    font-size: 1.05rem;
    background-color: var(--paper);
    border-radius: 999px;
}
#search-keywords #search_btn {
    min-width: 120px;
    padding-block: 9px;
    font-size: 0.95rem;
    font-weight: bold;
}

/* --- Badges and notices ---------------------------------------------------- */

main .bg-info,
main .bg-success {
    padding: 3px 12px !important;
    font-size: 0.85rem;
    font-weight: bold;
    color: var(--accent-text) !important;
    background-color: var(--accent-soft) !important;
    border: 1px solid var(--accent-soft-border);
    border-radius: 999px !important;
}
main p.bg-secondary {
    padding: 16px;
    color: var(--ink-700);
    text-align: center;
    background-color: var(--surface) !important;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-panel);
}
main .alert {
    border-radius: var(--radius-panel);
}
main .alert-success {
    color: var(--ink-800) !important;
    background-color: var(--accent-soft);
    border-color: var(--accent-soft-border);
}
main .alert-success .btn-close {
    filter: none;
}
body.dark-mode:not(.gray-mode) main .btn-close {
    filter: invert(1);
}

/* --- Cards: search results, download page ---------------------------------- */

main .card,
main .card.book_details_header,
main .card.book_details_header_alt {
    margin-bottom: 16px;
    overflow: hidden;
    color: var(--ink-800) !important;
    background-color: var(--surface);
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-panel);
    box-shadow: var(--shadow-panel);
}
main .card-header {
    padding: 14px 20px;
    font-size: 0.85rem;
    line-height: 1.9;
    color: var(--ink-500);
    background-color: var(--ink-50);
    border-bottom: 1px solid var(--ink-100);
}
main .card-body {
    padding: 20px;
}
main .card-text {
    line-height: 2;
    color: var(--ink-900);
}
main .card-footer {
    padding: 12px 20px 4px;
    background-color: transparent;
    border-top: 1px solid var(--ink-100);
}

.search-highlight,
.highlight {
    padding: 1px 4px;
    font-weight: bold;
    color: var(--mark-text) !important;
    background-color: var(--mark-bg);
    border-radius: 6px;
}

main .pagination {
    gap: 4px;
}
main .page-link {
    color: var(--ink-700);
    background-color: var(--surface);
    border: 1px solid var(--ink-200);
    border-radius: 10px !important;
}
main .page-link:hover {
    color: var(--accent-text);
    background-color: var(--accent-soft);
    border-color: var(--accent-soft-border);
}
main .page-item.active .page-link {
    color: var(--on-accent);
    background-color: var(--accent);
    border-color: var(--accent);
}
main .page-item.disabled .page-link {
    color: var(--ink-300);
    background-color: var(--surface);
    border-color: var(--ink-100);
}

/* --- Book list (DataTables) ------------------------------------------------ */

main .table,
main .table-dark {
    --bs-table-bg: var(--surface);
    --bs-table-striped-bg: var(--ink-50);
    --bs-table-striped-color: var(--ink-800);
    --bs-table-hover-bg: var(--accent-soft);
    --bs-table-hover-color: var(--ink-900);
    color: var(--ink-800);
    border-color: var(--ink-100);
}
main .table > :not(caption) > * > * {
    padding: 12px 14px;
    color: var(--ink-800);
    border-bottom-color: var(--ink-100);
}
main .table thead th {
    font-size: 0.8rem;
    color: var(--ink-500);
    background-color: var(--ink-50);
    border-bottom: 1px solid var(--ink-200) !important;
}
main table.dataTable {
    overflow: hidden;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-panel);
    border-collapse: separate !important;
    border-spacing: 0;
    box-shadow: var(--shadow-panel);
}
main table.dataTable.no-footer {
    border-bottom: 1px solid var(--ink-100);
}
main .dataTables_wrapper,
main .dataTables_wrapper .dataTables_length,
main .dataTables_wrapper .dataTables_filter,
main .dataTables_wrapper .dataTables_info,
main .dataTables_wrapper .dataTables_paginate {
    color: var(--ink-600) !important;
}
main .dataTables_wrapper .dataTables_length,
main .dataTables_wrapper .dataTables_filter {
    margin-bottom: 14px;
}
main .dataTables_wrapper input,
main .dataTables_wrapper select {
    padding: 6px 14px;
    font-size: 0.9rem;
}
main .dataTables_wrapper .dataTables_paginate .paginate_button {
    color: var(--ink-700) !important;
    background: var(--surface) !important;
    border: 1px solid var(--ink-200) !important;
    border-radius: 10px;
}
main .dataTables_wrapper .dataTables_paginate .paginate_button.current,
main .dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
    color: var(--on-accent) !important;
    background: var(--accent) !important;
    border-color: var(--accent) !important;
}
main .dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    color: var(--accent-text) !important;
    background: var(--accent-soft) !important;
    border-color: var(--accent-soft-border) !important;
}
main .dataTables_wrapper .dataTables_paginate .paginate_button.disabled,
main .dataTables_wrapper .dataTables_paginate .paginate_button.disabled:hover {
    color: var(--ink-300) !important;
    background: var(--surface) !important;
    border-color: var(--ink-100) !important;
}

/* --- Reading a book and viewing a page ------------------------------------- */

body .page,
body.dark-mode .page,
body.gray-mode .page,
body.light-mode .page {
    color: var(--ink-900);
    background: var(--surface) !important;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-panel);
    box-shadow: var(--shadow-panel);
    line-height: 2;
}
body .page.highlighted,
body.dark-mode .page.highlighted,
body.gray-mode .page.highlighted,
body.light-mode .page.highlighted {
    background: var(--surface) !important;
    border-color: var(--accent-soft-border);
}
body .page-header,
body.dark-mode .page-header,
body.gray-mode .page-header,
body.light-mode .page-header {
    margin-bottom: 16px;
    color: var(--ink-500);
    background-color: var(--surface);
    border-bottom: 1px solid var(--ink-100);
}

main .accordion-item,
main .accordion-collapse.bg-dark {
    color: var(--ink-800) !important;
    background-color: var(--surface) !important;
    border: 0;
}
main .accordion-collapse.bg-dark {
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-panel);
    box-shadow: var(--shadow-panel);
}
main .accordion-body h5 {
    font-size: 0.8rem;
    color: var(--ink-500);
}

/* The bordered summary boxes above a single page */
main .row.border-info,
main .row.border-success {
    padding-block: 16px;
    background-color: var(--surface);
    border-color: var(--ink-100) !important;
    border-radius: var(--radius-panel) !important;
    box-shadow: var(--shadow-panel);
}
main .row.border-info h5,
main .row.border-success h5 {
    margin-bottom: 6px !important;
    font-size: 0.8rem;
    color: var(--ink-500);
}
main iframe {
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-panel);
}

/* --- Footer --------------------------------------------------------------- */

.site-footer {
    padding: 28px 0;
    font-size: 12px;
    color: var(--ink-500);
    background-color: color-mix(in srgb, var(--surface) 60%, transparent);
    border-top: 1px solid var(--ink-100);
}
.site-footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.site-footer strong {
    color: var(--ink-700);
}
.site-footer nav {
    display: flex;
    gap: 16px;
}
.site-footer a {
    color: var(--ink-500);
    text-decoration: none;
}
.site-footer a:hover {
    color: var(--accent-text);
    text-decoration: underline;
}