/* ==========================================================================
   TAXTAMI — lessons.css
   Unified green theme for all lesson page types:

     Type A · lesson-details accordion   (ITC pages like itcfarming.html)
              <details class="lesson-details">
                <summary class="lesson-summary"><h2>…</h2></summary>
                <div class="section-content">…</div>
              </details>

     Type B · lesson-section plain h2    (VAT / Debt / newer ITC pages)
              <section class="lesson-section">
                <h2>…</h2>
                <p>…</p>
              </section>

     Type C · lesson-section badge h3    (itcfoundations / CGT pages)
              <section class="lesson-section">
                <h3><span class="section-letter">A</span> …</h3>
                <p>…</p>
              </section>

   Colour palette
   ─────────────────────────────────────────────────────────────────────────
   --primary-color   #2c724f   dark green   (borders, badges, headings)
   --primary-mid     #3d8f65   mid green    (hover states)
   --primary-light   #e9f1ed   pale green   (header bands, tinted rows)
   --secondary-color #f7b731   amber/gold   (case-law accents, ✓ ticks)
   ========================================================================== */

/* ── CSS custom properties ─────────────────────────────────────────────── */
:root {
    --primary-color:    #2c724f;
    --primary-mid:      #3d8f65;
    --primary-light:    #e9f1ed;
    --secondary-color:  #f7b731;
    --text-dark:        #2d3436;
    --text-muted:       #636e72;
    --bg-light:         #f9f9f9;
    --white:            #ffffff;
    --shadow:           0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius:    12px;
    --header-band-pad:  30px;     /* must match .lesson-section padding    */
}

html { scroll-behavior: smooth; }

/* ==========================================================================
   1 · LESSON CONTAINER
   ========================================================================== */

/* Debt / newer lesson pages wrap content in div.section (no built-in padding).
   Match the 90px top / 70px bottom spacing of .sidebar-page-container used
   by ITC lessons so all lesson page types have identical vertical breathing room. */
.section > .container {
    padding-top: 90px;
    padding-bottom: 70px;
}

.lesson-container {
    font-family: 'Work Sans', sans-serif;
    line-height: 1.8;
    color: var(--text-dark);
}

/* ==========================================================================
   2 · LESSON NAVIGATION BAR (top pill links)
   ========================================================================== */
.lesson-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    padding: 15px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    position: relative;
    z-index: 10;
    box-shadow: var(--shadow);
}

.lesson-nav a {
    background: var(--white);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    transition: all 0.25s ease;
    border: 1px solid #dde8e3;
    text-decoration: none;
}

.lesson-nav a:hover,
.lesson-nav a.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* ==========================================================================
   3 · TYPE A — ACCORDION SECTIONS  (lesson-details / lesson-summary)
   ========================================================================== */

/* The card wrapper --------------------------------------------------------- */
.lesson-details {
    margin-bottom: 22px;
    background: var(--white);
    border-radius: var(--border-radius);
    border-left: 5px solid var(--primary-color);
    box-shadow: var(--shadow);
    overflow: hidden;              /* clips the header band to rounded corners */
    transition: box-shadow 0.3s ease;
}

.lesson-details:hover {
    box-shadow: 0 8px 20px rgba(44, 114, 79, 0.15);
}

/* The clickable summary / header band ------------------------------------- */
.lesson-summary {
    padding: 18px 30px;
    cursor: pointer;
    list-style: none;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* GREEN HEADER BAND — the defining visual of the itcfarming.html theme  */
    background: var(--primary-light);
    border-bottom: 2px solid var(--primary-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    transition: background 0.25s ease;
}

/* Remove browser default markers */
.lesson-summary::-webkit-details-marker { display: none; }

/* Custom chevron arrow */
.lesson-summary::after {
    content: '\25BC';
    font-size: 11px;
    color: var(--primary-color);
    flex-shrink: 0;
    transition: transform 0.3s ease;
    margin-left: 10px;
}

.lesson-details[open] .lesson-summary::after {
    transform: rotate(180deg);
}

/* When closed — no bottom border, fully rounded card */
.lesson-details:not([open]) .lesson-summary {
    border-bottom-color: transparent;
    border-radius: var(--border-radius);
}

.lesson-summary:hover {
    background: #d4e5db;
}

/* Heading text inside the summary bar */
.lesson-summary h2 {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
    margin: 0;
    padding: 0;
    border: none;
    display: inline;
}

/* Content area below the summary bar */
.section-content {
    padding: 20px 30px 24px 30px;
}

/* Small extra space when accordion is open */
.lesson-details[open] {
    padding-bottom: 0;             /* section-content already has its own   */
}

/* ==========================================================================
   4 · TYPE B & C — STATIC SECTION CARDS  (lesson-section)
   Each card gets a green header band identical to the accordion summary bar,
   created by expanding the first heading element to break out of the card's
   padding using negative margins.
   ========================================================================== */

.lesson-section {
    margin-bottom: 28px;
    padding: var(--header-band-pad);
    background: var(--white);
    border-radius: var(--border-radius);
    border-left: 5px solid var(--primary-color);
    box-shadow: var(--shadow);
    overflow: hidden;              /* required: clips breakout header band   */
    transition: box-shadow 0.3s ease;
}

.lesson-section:hover {
    box-shadow: 0 8px 20px rgba(44, 114, 79, 0.15);
}

/* ── Section header band mixin (applied to both h2 and h3) ─────────────── */
/* The negative margins exactly cancel the parent's 30px padding so the
   heading stretches edge-to-edge and sits flush with the card top.        */
.lesson-section > h2,
.lesson-section > h3 {
    /* positioning — break out of card padding */
    margin: calc(-1 * var(--header-band-pad))
            calc(-1 * var(--header-band-pad))
            24px
            calc(-1 * var(--header-band-pad));
    padding: 18px var(--header-band-pad);
    /* appearance — matches lesson-summary */
    background: var(--primary-light);
    border-bottom: 2px solid var(--primary-color);
    border-radius: 0;              /* parent overflow:hidden handles corners */
    /* typography */
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
    /* layout — flex allows section-letter badge to sit inline */
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Section-letter circle badge (A, B, C …) — used in Type C pages */
.lesson-section > h3 .section-letter,
.lesson-section > h2 .section-letter {
    background: var(--primary-color);
    color: var(--white);
    width: 34px;
    height: 34px;
    min-width: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 17px;
    font-weight: 700;
}

/* ==========================================================================
   5 · HEADINGS INSIDE CONTENT AREAS
   Sub-headings that appear within section content (below the header band).
   ========================================================================== */

/* h2 / h3 used as content sub-headings (inside section-content or after
   the main heading in lesson-section)                                      */
.section-content h2,
.section-content h3,
.lesson-section > .section-content h2,
.lesson-section > .section-content h3 {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.15rem;
    margin-top: 2em;
    margin-bottom: 0.6em;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--primary-light);
    /* NOT full-width — these are inline content headings */
    display: block;
}

/* h4, h5 — tertiary headings */
.section-content h4,
.section-content h5,
.lesson-section h4,
.lesson-section h5 {
    color: var(--primary-color);
    font-weight: 600;
    margin-top: 1.8em;
    margin-bottom: 0.5em;
}

/* h6 — minor labels */
.section-content h6,
.lesson-section h6 {
    color: var(--primary-mid);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.9rem;
    margin-top: 1.4em;
    margin-bottom: 0.4em;
}

/* First heading inside any content area — reduced top gap */
.section-content h2:first-child,
.section-content h3:first-child,
.section-content h4:first-child,
.section-content h5:first-child,
.section-content h6:first-child,
.lesson-section p:first-of-type + h4,
.lesson-section p:first-of-type + h5 {
    margin-top: 0.5em;
}

/* ==========================================================================
   6 · COMPONENT BOXES
   Themed containers used inside section content to highlight different
   content types (legislation, case law, pitfalls, etc.).
   ========================================================================== */

/* ── A. Legislative / framework box ──────────────────────────────────────*/
.framework-box {
    background: var(--primary-light);
    border: 1px dashed var(--primary-color);
    border-left: 4px solid var(--primary-color);
    padding: 20px 22px;
    border-radius: 8px;
    margin: 16px 0;
}

/* ── B. Legal update / Finance Act amendment notice ─────────────────────*/
.legal-update {
    background: #fffbee;
    border: 1px solid var(--secondary-color);
    border-left: 4px solid var(--secondary-color);
    padding: 15px 20px;
    border-radius: 8px;
    margin: 14px 0;
    font-style: italic;
}

/* ── C. Case law box ─────────────────────────────────────────────────────*/
.case-box {
    border-left: 4px solid var(--secondary-color);
    background: #fffdf5;
    padding: 20px 22px;
    margin: 16px 0;
    border-radius: 0 8px 8px 0;
}

.case-citation {
    font-weight: 700;
    color: #8a6200;
    margin-bottom: 6px;
}

/* ── D. Applicability grid (D-section individual / SME / corporate) ──────*/
.applicability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-top: 18px;
}

.applicability-card {
    background: var(--white);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #d4e8db;
    border-top: 4px solid var(--primary-color);
    text-align: left;
}

.applicability-card h4 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1rem;
    margin-top: 0;
}

/* ── E. Inner service box (alternative applicability card) ───────────────*/
.inner-service-box {
    background: var(--white);
    border: 1px solid #d4e8db;
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    padding: 20px 24px;
    margin-bottom: 18px;
    transition: box-shadow 0.2s ease;
}

.inner-service-box:hover {
    box-shadow: 0 4px 14px rgba(44, 114, 79, 0.15);
}

.inner-service-box h5 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 10px;
    margin-top: 0;
}

/* ── F. Pitfall / warning box ────────────────────────────────────────────*/
.pitfall-box {
    background: #fff4f4;
    border-left: 4px solid #c0392b;
    padding: 20px 22px;
    margin: 16px 0;
    border-radius: 0 8px 8px 0;
}

.pitfall-title {
    color: #c0392b;
    font-weight: 700;
    margin-bottom: 6px;
}

/* ── G. Quiz questions ───────────────────────────────────────────────────*/
.quiz-question {
    background: #f5f6fa;
    padding: 18px 22px;
    border-radius: 8px;
    margin: 14px 0;
    border: 1px solid #dde3ea;
    border-left: 4px solid var(--primary-mid);
}

/* ── H. Quiz answer / explanation ────────────────────────────────────────*/
.quiz-explanation {
    background: #edfaf4;
    padding: 18px 22px;
    border-radius: 8px;
    margin: 12px 0;
    border-left: 4px solid var(--primary-color);
}

/* ── I. Key takeaway sections (dark green panel, white text) ─────────────*/
.takeaway-list,
.takeaway-box {
    background: var(--primary-color);
    color: var(--white);
    padding: 30px 36px;
    border-radius: var(--border-radius);
    margin-top: 10px;
}

.takeaway-list p,   .takeaway-box p,
.takeaway-list li,  .takeaway-box li,
.takeaway-list strong, .takeaway-box strong,
.takeaway-list div, .takeaway-box div,
.takeaway-list table, .takeaway-box table,
.takeaway-list th,  .takeaway-box th,
.takeaway-list td,  .takeaway-box td {
    color: var(--white) !important;
}

.takeaway-list h3,
.takeaway-box h3 {
    color: var(--white);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    padding-bottom: 10px;
    margin-top: 0;
}

.takeaway-list ul li,
.takeaway-box ul li {
    margin-bottom: 14px;
    position: relative;
    padding-left: 28px;
    color: var(--white);
}

.takeaway-list ul li::before,
.takeaway-box ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

/* ==========================================================================
   7 · CONTENT ELEMENTS (tables, definition lists, blockquotes)
   Consistent green-palette styling across all section types.
   ========================================================================== */

/* ── Tables ──────────────────────────────────────────────────────────────*/
.lesson-section table,
.section-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 18px 0;
    font-size: 0.95rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(44, 114, 79, 0.10);
}

.lesson-section table thead tr,
.section-content table thead tr {
    background: var(--primary-color);
}

.lesson-section table thead th,
.section-content table thead th {
    padding: 12px 16px;
    font-weight: 600;
    text-align: left;
    color: var(--white);
    border: none;
}

.lesson-section table tbody tr:nth-child(even),
.section-content table tbody tr:nth-child(even) {
    background: var(--primary-light);
}

.lesson-section table tbody tr:nth-child(odd),
.section-content table tbody tr:nth-child(odd) {
    background: var(--white);
}

.lesson-section table tbody td,
.section-content table tbody td {
    padding: 10px 16px;
    border-bottom: 1px solid #d8eae2;
    vertical-align: top;
}

/* ── Definition lists ────────────────────────────────────────────────────*/
.lesson-section dl,
.section-content dl {
    margin: 16px 0;
}

.lesson-section dt,
.section-content dt {
    color: var(--primary-color);
    font-weight: 700;
    margin-top: 14px;
    padding-left: 12px;
    border-left: 3px solid var(--primary-color);
}

.lesson-section dd,
.section-content dd {
    margin-left: 18px;
    margin-top: 4px;
    padding: 6px 12px 6px 14px;
    background: var(--primary-light);
    border-radius: 0 6px 6px 0;
    font-size: 0.97rem;
}

/* ── Blockquotes ─────────────────────────────────────────────────────────*/
.lesson-section blockquote,
.section-content blockquote {
    border-left: 4px solid var(--primary-color);
    background: var(--primary-light);
    margin: 18px 0;
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: var(--text-dark);
}

/* ── Paragraph spacing ───────────────────────────────────────────────────*/
.section-content p,
.lesson-section > p {
    margin-bottom: 1em;
    line-height: 1.85;
}

/* ── Unordered/ordered list styling inside content ───────────────────────*/
.section-content ul,
.section-content ol,
.lesson-section > ul,
.lesson-section > ol {
    padding-left: 1.6em;
    margin-bottom: 1em;
}

.section-content ul li,
.section-content ol li,
.lesson-section > ul li,
.lesson-section > ol li {
    margin-bottom: 0.4em;
}

/* ==========================================================================
   8 · SIDEBAR ELEMENTS
   ========================================================================== */

/* Lesson sections list widget */
.lesson-list li a {
    color: var(--text-dark);
    display: block;
    padding: 5px 0;
    transition: color 0.2s ease;
    text-decoration: none;
}

.lesson-list li a:hover {
    color: var(--primary-color);
}

/* Category boxed sidebar links */
.category-boxed.current,
.category-boxed.current a {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

/* ==========================================================================
   9 · LESSON PAGE HEADER
   Replaces the old .service-title-box (pink) and plain feature-steps-title h2.
   Displayed above the feature-steps grid, showing:
   lesson number tag · lesson title · short excerpt.
   ========================================================================== */

.lesson-page-header {
    display: block;
    background: none;
    padding: 0 0 28px;
    margin-bottom: 8px;
    max-width: 80%;
}

.lesson-page-header .lesson-number {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 6px;
}

.lesson-page-header .lesson-name {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: #1a1a1a;
    line-height: 1.15;
    margin: 0 0 10px;
}

.lesson-page-header .lesson-excerpt {
    display: block;
    font-size: 0.92rem;
    color: #555;
    line-height: 1.6;
    margin: 0;
    font-weight: 400;
    font-style: italic;
}

/* Responsive: full-width on smaller screens */
@media (max-width: 768px) {
    .lesson-page-header {
        max-width: 100%;
    }
    .lesson-page-header .lesson-name {
        font-size: 1.5rem;
    }
}

/* ==========================================================================
   10 · READABILITY HIGHLIGHTS  (applied by readability_enhancer.py)
   Two inline highlight types to improve scan-ability of lesson content.

   .leg-ref  — legislative references (section numbers, act names, schedules,
               statutory instruments).  Green tint matches site primary colour.

   .key-term — core Zimbabwean tax concepts / defined terms.  Amber/gold tint
               matches the site's secondary colour (case-law accents).
   ========================================================================== */

/* ── Legislative reference (Section 8(1)(a), Finance Act 2025, etc.) ──────── */
.leg-ref {
    background: rgba(44, 114, 79, 0.10);
    color: #1a5c35;
    border-bottom: 2px solid var(--primary-color);
    padding: 1px 5px;
    border-radius: 3px;
    font-weight: 700;
    font-size: 0.94em;
    display: inline;
    cursor: pointer;
    transition: background 0.2s ease;
}

.leg-ref:hover {
    background: rgba(44, 114, 79, 0.20);
}

/* Invert colours inside dark takeaway panels */
.takeaway-list .leg-ref,
.takeaway-box .leg-ref {
    background: rgba(255, 255, 255, 0.18);
    color: #b8ffda;
    border-bottom-color: var(--secondary-color);
}

/* ── Key defined tax term / concept ───────────────────────────────────────── */
.key-term {
    background: none;
    color: inherit;
    border-bottom: 2px dotted var(--secondary-color);
    padding: 0 2px;
    border-radius: 0;
    font-weight: 700;
    font-style: italic;
    display: inline;
    cursor: default;
}

.key-term:hover {
    background: none;
}

/* Invert colours inside dark takeaway panels */
.takeaway-list .key-term,
.takeaway-box .key-term {
    color: inherit;
    border-bottom-color: var(--secondary-color);
}

/* ── Leg-ref inside a key-term (or vice-versa) — avoid double border ──────── */
.key-term .leg-ref,
.leg-ref .key-term {
    border-bottom: none;
    padding: 0;
    background: transparent;
}

/* ── Quoted text ("direct quotes / scare-quoted terms") ──────────────────── */
.quoted-text {
    font-weight: 700;
    font-style: italic;
    color: #1a3a4f;
    border-left: 3px solid var(--primary-color);
    padding: 0 5px 0 6px;
    background: rgba(44, 114, 79, 0.06);
    border-radius: 0 3px 3px 0;
    display: inline;
}

/* Inside dark takeaway panels */
.takeaway-list .quoted-text,
.takeaway-box .quoted-text {
    color: #cbe8d8;
    background: rgba(255, 255, 255, 0.10);
    border-left-color: var(--secondary-color);
}

/* ==========================================================================
   11 · RESPONSIVE ADJUSTMENTS
   ========================================================================== */
@media (max-width: 992px) {
    .lesson-section > h2,
    .lesson-section > h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 768px) {
    :root {
        --header-band-pad: 20px;
    }

    .lesson-section {
        padding: var(--header-band-pad);
    }

    .lesson-summary {
        padding: 15px 20px;
    }

    .section-content {
        padding: 16px 20px 20px 20px;
    }

    .lesson-summary h2 {
        font-size: 1rem;
    }

    .lesson-section > h2,
    .lesson-section > h3 {
        font-size: 1rem;
        padding: 14px var(--header-band-pad);
    }

    .takeaway-list,
    .takeaway-box {
        padding: 20px;
    }

    .lesson-section table,
    .section-content table {
        font-size: 0.88rem;
    }

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