/*
 * Reading Material: a deliberately distinct "study/book" visual language
 * layered on top of the site's navy/lime brand, same relationship a
 * printed book's body typography has to its publisher's marketing
 * materials. Site chrome (header, footer, breadcrumbs, page-hero) stays on
 * the shared brand system untouched; only the Reading Material content
 * itself (archive cards, the track syllabus, a chapter's body) uses the
 * tokens/fonts below. Ported from the standalone "সংখ্যা নোটস" study-guide
 * prototype, adapted to locally-vendored fonts (no remote requests) and a
 * light-only palette (the site has no dark-mode support elsewhere, so
 * chrome and content must agree).
 *
 * Loaded only on Reading Material pages, see inc/assets.php.
 */

/* ---------- Fonts (self-hosted; see assets/vendor/fonts/README.md) ---------- */

@font-face {
    font-family: "Tiro Bangla";
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url("../vendor/fonts/tiro-bangla-400-bengali.woff2") format("woff2");
    unicode-range: U+0951-0952, U+0964-0965, U+0980-09FE, U+1CD0, U+1CD2, U+1CD5-1CD6, U+1CD8, U+1CE1, U+1CEA, U+1CED, U+1CF2, U+1CF5-1CF7, U+200C-200D, U+20B9, U+25CC, U+A8F1;
}

@font-face {
    font-family: "Tiro Bangla";
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url("../vendor/fonts/tiro-bangla-400-latin.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-400-bengali.woff2") format("woff2");
    unicode-range: U+0951-0952, U+0964-0965, U+0980-09FE, U+1CD0, U+1CD2, U+1CD5-1CD6, U+1CD8, U+1CE1, U+1CEA, U+1CED, U+1CF2, U+1CF5-1CF7, U+200C-200D, U+20B9, U+25CC, U+A8F1;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-400-latin.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-500-bengali.woff2") format("woff2");
    unicode-range: U+0951-0952, U+0964-0965, U+0980-09FE, U+1CD0, U+1CD2, U+1CD5-1CD6, U+1CD8, U+1CE1, U+1CEA, U+1CED, U+1CF2, U+1CF5-1CF7, U+200C-200D, U+20B9, U+25CC, U+A8F1;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-500-latin.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-600-bengali.woff2") format("woff2");
    unicode-range: U+0951-0952, U+0964-0965, U+0980-09FE, U+1CD0, U+1CD2, U+1CD5-1CD6, U+1CD8, U+1CE1, U+1CEA, U+1CED, U+1CF2, U+1CF5-1CF7, U+200C-200D, U+20B9, U+25CC, U+A8F1;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-600-latin.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-700-bengali.woff2") format("woff2");
    unicode-range: U+0951-0952, U+0964-0965, U+0980-09FE, U+1CD0, U+1CD2, U+1CD5-1CD6, U+1CD8, U+1CE1, U+1CEA, U+1CED, U+1CF2, U+1CF5-1CF7, U+200C-200D, U+20B9, U+25CC, U+A8F1;
}

@font-face {
    font-family: "Hind Siliguri";
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url("../vendor/fonts/hind-siliguri-700-latin.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215;
}

/* ---------- Tokens ---------- */

:root {
    --reading-font-body: "Hind Siliguri", "Noto Sans Bengali", var(--wp--preset--font-family--system, sans-serif);
    --reading-font-display: "Tiro Bangla", "Noto Serif Bengali", georgia, serif;
    --reading-paper: #f1f3f6;
    --reading-panel: #fff;
    --reading-panel-2: #f7f8fa;
    --reading-ink: #16233a;
    --reading-ink-soft: #4b5670;
    --reading-ink-faint: #7c879c;
    --reading-rule: #dce1e8;
    --reading-accent: #b8842b;
    --reading-accent-deep: #8c5f14;
    --reading-accent-soft: #fbf1dc;
    --reading-formula-bg: #eef2f8;
    --reading-banner-bg: #16233a;
    --reading-banner-ink: #f4e8cc;
    --reading-shadow: 0 1px 2px rgba(22, 35, 58, .06), 0 8px 24px -12px rgba(22, 35, 58, .18);
}

/* Page-level background: only the three Reading Material page templates. */
body.post-type-archive-learnera_reading .section,
body.tax-learnera_prep_track .section,
body.single-learnera_reading .section {
    background: var(--reading-paper);
}

/* ---------- Archive: chapter grid ---------- */

.reading-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    font-family: var(--reading-font-body);
}

@media (min-width: 640px) {
    .reading-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 900px) {
    .reading-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.reading-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 25px;
    border: 1px solid var(--reading-rule);
    border-radius: 14px;
    background: var(--reading-panel);
    box-shadow: var(--reading-shadow);
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.reading-card:hover {
    transform: translateY(-4px);
    border-color: var(--reading-accent);
}

.reading-card-badge {
    align-self: flex-start;
    padding: 5px 13px;
    border-radius: 999px;
    background: var(--reading-accent-soft);
    color: var(--reading-accent-deep);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.reading-card-title {
    margin: 0;
    font-family: var(--reading-font-display);
    font-size: 19px;
    font-weight: 400;
    color: var(--reading-ink);
}

.reading-card-meta {
    margin: 0;
    color: var(--reading-ink-faint);
    font-size: 13px;
}

/* ---------- Track hub: chapters grouped by subject ---------- */

.reading-subject-group {
    margin-bottom: 40px;
    font-family: var(--reading-font-body);
}

.reading-subject-group:last-child {
    margin-bottom: 0;
}

.reading-subject-title {
    margin: 0 0 16px;
    font-family: var(--reading-font-display);
    font-weight: 400;
    font-size: 22px;
    color: var(--reading-ink);
}

.reading-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.reading-toc-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border: 1px solid var(--reading-rule);
    border-radius: 12px;
    background: var(--reading-panel);
    color: var(--reading-ink);
    text-decoration: none;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.reading-toc-item:hover,
.reading-toc-item:focus-visible {
    border-color: var(--reading-accent);
    background: var(--reading-accent-soft);
}

.reading-toc-num {
    flex: none;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--reading-banner-bg);
    color: var(--reading-banner-ink);
    font-size: 13px;
    font-weight: 700;
}

.reading-toc-item-title {
    flex: 1;
    font-weight: 600;
}

.reading-toc-item-meta {
    flex: none;
    color: var(--reading-ink-faint);
    font-size: 13px;
}

/* ---------- Single chapter: layout, sidebar TOC, content ---------- */

.reading-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    align-items: start;
    font-family: var(--reading-font-body);
    color: var(--reading-ink-soft);
}

@media (min-width: 960px) {
    .reading-layout {
        grid-template-columns: 240px minmax(0, 1fr);
    }
}

.reading-sidebar-mobile {
    border: 1px solid var(--reading-rule);
    border-radius: 12px;
    background: var(--reading-panel);
    margin-bottom: 8px;
}

.reading-sidebar-mobile summary {
    cursor: pointer;
    padding: 14px 18px;
    font-weight: 700;
    color: var(--reading-ink);
    list-style: none;
}

.reading-sidebar-mobile summary::-webkit-details-marker {
    display: none;
}

.reading-sidebar-mobile nav {
    padding: 0 18px 16px;
}

@media (min-width: 960px) {
    .reading-sidebar-mobile {
        display: none;
    }
}

.reading-sidebar {
    display: none;
}

@media (min-width: 960px) {
    .reading-sidebar {
        display: block;
        position: sticky;
        top: 24px;
    }
}

.reading-sidebar-title {
    margin: 0 0 12px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--reading-ink-faint);
}

.reading-sidebar nav ul,
.reading-sidebar-mobile nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    border-inline-start: 2px solid var(--reading-rule);
}

.reading-sidebar-link {
    display: block;
    padding: 6px 0 6px 16px;
    color: var(--reading-ink-soft);
    text-decoration: none;
    font-size: 14px;
    border-inline-start: 2px solid transparent;
    margin-inline-start: -2px;
}

.reading-sidebar-link:hover,
.reading-sidebar-link:focus-visible {
    color: var(--reading-accent-deep);
    border-inline-start-color: var(--reading-accent);
}

.reading-sidebar-link.is-level-4 {
    padding-inline-start: 32px;
    font-size: 13px;
    color: var(--reading-ink-faint);
}

.reading-meta-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0 0;
}

.reading-badge {
    padding: 5px 13px;
    border-radius: 999px;
    background: var(--reading-accent-soft);
    color: var(--reading-accent-deep);
    font-size: 12px;
    font-weight: 700;
}

.reading-content {
    max-width: 72ch;
}

.reading-content > * {
    margin-block: 1.2em;
}

.reading-content h2,
.reading-content h3,
.reading-content h4 {
    font-family: var(--reading-font-display);
    font-weight: 400;
    color: var(--reading-ink);
    text-wrap: balance;
    scroll-margin-top: 24px;
}

.reading-content h2 {
    font-size: 1.6rem;
    padding-bottom: 0.5em;
    border-bottom: 1px solid var(--reading-rule);
    margin-top: 2em;
}

.reading-content h3 {
    font-size: 1.25rem;
    margin-top: 1.7em;
}

.reading-content p,
.reading-content li {
    line-height: 1.75;
}

.reading-content strong {
    color: var(--reading-ink);
}

.reading-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.reading-content table th,
.reading-content table td {
    text-align: left;
    padding: 0.5em 0.7em;
    border-bottom: 1px solid var(--reading-rule);
}

.reading-content table th {
    color: var(--reading-ink-faint);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.reading-content ul,
.reading-content ol {
    padding-inline-start: 1.3em;
}

.reading-content ul li,
.reading-content ol li {
    margin-block: 0.5em;
}

.reading-section-banner {
    display: inline-block;
    margin-top: 2.2em;
    margin-bottom: 0.6em;
    padding: 8px 20px;
    border-radius: 999px;
    background: var(--reading-banner-bg);
    color: var(--reading-banner-ink);
    font-size: 0.95rem;
    font-weight: 700;
}

.reading-definition {
    padding: 18px 22px;
    border-radius: 14px;
    background: var(--reading-panel-2);
    border: 1px solid var(--reading-rule);
}

.reading-definition > *:first-child {
    margin-top: 0;
}

.reading-definition > *:last-child {
    margin-bottom: 0;
}

.reading-example {
    padding: 16px 20px;
    border-radius: 10px;
    background: var(--reading-formula-bg);
    border-inline-start: 4px solid var(--reading-accent);
}

.reading-example > *:first-child {
    margin-top: 0;
}

.reading-example > *:last-child {
    margin-bottom: 0;
}

.reading-example > p:first-child strong {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--reading-accent-deep);
}

/* ---------- Practice set (the [learnera_practice_set] shortcode output) ----------
   Re-skins the shared .exam-question-* markup (see
   template-parts/question-bank/question-list.php) to match this section's
   palette, scoped so real Exam Pages (which never wrap in
   .reading-practice-set) are completely unaffected. */

.reading-practice-set {
    margin-block-start: 8px;
    font-family: var(--reading-font-body);
}

.reading-practice-set-empty {
    color: var(--reading-ink-faint);
    font-style: italic;
}

.reading-practice-set .exam-question-card {
    border-color: var(--reading-rule);
    background: var(--reading-panel);
}

.reading-practice-set .exam-question-num {
    background: var(--reading-banner-bg);
    color: var(--reading-banner-ink);
}

.reading-practice-set .exam-question-option--correct {
    background: var(--reading-accent-soft);
    border-color: var(--reading-accent);
}

.reading-practice-set .exam-question-text {
    color: var(--reading-ink);
}

/* ---------- Prev/next chapter nav ---------- */

.reading-chapter-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-block-start: 48px;
    padding-block-start: 24px;
    border-top: 1px solid var(--reading-rule);
    font-family: var(--reading-font-body);
}

.reading-chapter-nav-link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 20px;
    border: 1px solid var(--reading-rule);
    border-radius: 14px;
    text-decoration: none;
    color: var(--reading-ink);
    background: var(--reading-panel);
    transition: border-color 0.2s ease;
}

.reading-chapter-nav-link:hover,
.reading-chapter-nav-link:focus-visible {
    border-color: var(--reading-accent);
}

.reading-chapter-nav-link--next {
    text-align: end;
    grid-column: 2;
}

.reading-chapter-nav-label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--reading-ink-faint);
}

.reading-chapter-nav-title {
    font-weight: 600;
}

@media (max-width: 560px) {
    .reading-chapter-nav {
        grid-template-columns: 1fr;
    }

    .reading-chapter-nav-link--next {
        grid-column: 1;
        text-align: start;
    }
}