/* ---------- Lesson layout ---------- */

.lesson-breadcrumbs {
    padding-left: 0;
    padding-right: 0;
}

.lesson-content {
    line-height: 1.6;
}

/* Plain HTML in lesson pages (p, h2, h3, lists) */
.lesson-content p {
    margin: 0 0 12px;
}

.lesson-content h2 {
    margin: 32px 0 8px;
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
}

.lesson-content h3 {
    margin: 24px 0 6px;
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.3;
}

.lesson-content ol,
.lesson-content ul {
    margin: 0 0 12px;
    padding-left: 24px;
}

.lesson-content li {
    margin: 6px 0;
}

.lesson-cta {
    margin-top: 8px;
}

.lesson-locked {
    border: 1px solid var(--lp-border-soft);
    border-radius: 8px;
}

.lesson-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.lesson-footer-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}

/* ---------- Callout ---------- */

.lesson-callout-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.lesson-callout-body > *:last-child {
    margin-bottom: 0;
}

/* ---------- Big letter ---------- */

.lesson-big-letter {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 16px 0;
}

.lesson-big-letter-text {
    font-size: clamp(4rem, 12vw, 7.5rem);
    font-weight: 700;
    line-height: 1;
    color: var(--lp-text-strong);
}

.lesson-big-letter-caption {
    margin-top: 8px;
    color: var(--lp-text-soft);
    font-size: 1.25rem;
}

/* ---------- Column formula ---------- */

.lesson-formula {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.lesson-formula-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 96px;
    padding: 8px 16px;
    border-left: 2px solid var(--lp-border-mid);
    border-right: 2px solid var(--lp-border-mid);
    border-radius: 4px;
}

.lesson-formula-column-title {
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--lp-text-main2);
}

.lesson-formula-column-value {
    line-height: 1.6;
}

.lesson-formula-column-highlight {
    border-color: var(--mud-palette-primary);
    font-weight: 600;
}

.lesson-formula-operator {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--lp-text-muted);
}

/* ---------- Coming soon ---------- */

.lesson-coming-soon {
    border: 2px dashed var(--lp-border-soft);
    border-radius: 8px;
}

/* ---------- Media ---------- */

.lesson-figure {
    margin: 16px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lesson-image,
.lesson-video {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.lesson-audio {
    width: 100%;
}

.lesson-figure figcaption {
    margin-top: 8px;
    font-size: 0.875rem;
    text-align: center;
    color: var(--lp-text-muted);
}

.lesson-media-placeholder {
    width: 100%;
    padding: 24px 16px;
    border: 2px dashed var(--lp-border-soft);
    border-radius: 8px;
}

.lesson-media-location {
    font-size: 0.75rem;
    word-break: break-all;
    color: var(--lp-text-muted);
}

/* ---------- Styles ---------- */

.lesson-figure.style-image {
    display: inline-flex;
    margin: 8px;
    vertical-align: top;
}

.lesson-real-vs-enuncy {
    margin: 16px 0;
}

.lesson-real-vs-enuncy-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
    justify-items: center;
}

.lesson-real-vs-enuncy-row .lesson-figure {
    width: 100%;
    margin: 0;
}

/* Same height for photo and model image; the width follows the aspect ratio (capped by the column). */
.lesson-real-vs-enuncy-row .lesson-image {
    width: auto;
    max-width: 100%;
    height: var(--real-vs-enuncy-height, 200px);
    object-fit: contain;
}

.lesson-real-vs-enuncy-small {
    --real-vs-enuncy-height: 140px;
}

.lesson-real-vs-enuncy-medium {
    --real-vs-enuncy-height: 200px;
}

.lesson-real-vs-enuncy-large {
    --real-vs-enuncy-height: 280px;
}

@media (max-width: 600px) {
    .lesson-real-vs-enuncy-medium,
    .lesson-real-vs-enuncy-large {
        --real-vs-enuncy-height: 140px;
    }
}

.lesson-real-vs-enuncy > figcaption {
    margin-top: 8px;
    font-size: 0.875rem;
    text-align: center;
    color: var(--lp-text-muted);
}

.style-chip {
    position: relative;
    display: inline-block;
    padding: 0 8px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
    cursor: help;
    outline: none;
}

.style-chip-mouth {
    color: var(--mud-palette-primary);
    background-color: color-mix(in srgb, var(--mud-palette-primary) 14%, transparent);
}

.style-chip-tongue {
    color: var(--mud-palette-secondary);
    background-color: color-mix(in srgb, var(--mud-palette-secondary) 14%, transparent);
}

.style-chip:focus-visible {
    box-shadow: 0 0 0 2px var(--mud-palette-primary);
}

/* Inline popups ([data-popup-host] + [data-popup], see wwwroot/js/lesson.js): StyleChip and GlossaryTerm.
   Positioned with fixed coordinates by the script, so tables cannot clip them. */
.lesson-popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1500;
    width: max-content;
    padding: 8px;
    border: 1px solid var(--lp-border-soft);
    border-radius: 8px;
    background-color: var(--mud-palette-surface);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
    color: var(--mud-palette-text-primary);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: normal;
    line-height: 1.4;
    white-space: normal;
    cursor: default;
}

.popup-open > .lesson-popup {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.style-chip-popup {
    max-width: 200px;
    align-items: center;
    text-align: center;
}

.style-chip-popup-image {
    display: block;
    width: 120px;
    height: auto;
    border-radius: 6px;
    margin-bottom: 4px;
}

.style-chip-popup-name {
    font-weight: 600;
}

.style-chip-popup-category,
.style-chip-popup-details {
    font-size: 0.8em;
    color: var(--lp-text-muted);
}

/* ---------- Style sequence ---------- */

.style-sequence-images {
    margin: 16px 0;
}

.style-sequence-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.style-sequence-steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

.style-sequence-images .style-sequence-step {
    display: flex;
    align-items: center;
}

.style-sequence-step-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.style-sequence-step-content .lesson-figure.style-image {
    margin: 4px;
}

.style-sequence-images .style-sequence-arrow {
    font-size: 1.5rem;
    margin: 0 4px;
    color: var(--lp-text-muted);
}

.style-sequence-step:first-child .style-sequence-arrow {
    display: none;
}

.style-sequence-text {
    font-weight: 600;
}

.style-sequence-ipa {
    font-size: 1.25rem;
}

.style-sequence-images > figcaption {
    margin-top: 8px;
    font-size: 0.875rem;
    text-align: center;
    color: var(--lp-text-muted);
}

.style-sequence-chips .style-sequence-step {
    white-space: nowrap;
}

.style-sequence-chips .style-sequence-arrow {
    margin: 0 4px;
    color: var(--lp-text-muted);
}

.style-sequence-chips .style-chip + .style-chip {
    margin-left: 4px;
}

/* ---------- Word table ---------- */

.lesson-word-table-figure {
    margin: 16px 0;
}

/* Auto layout: columns grow with their content (chips do not wrap inside), the table scrolls sideways
   when it is wider than the screen instead of letting chips overlap the next column. */
.lesson-word-table table {
    table-layout: auto !important;
}

.lesson-word-table th,
.lesson-word-table td {
    text-align: center;
}

@media (max-width: 600px) {
    .lesson-word-table th,
    .lesson-word-table td {
        padding-left: 6px !important;
        padding-right: 6px !important;
    }

    .lesson-word-table .style-chip {
        font-size: 0.75em;
        padding: 0 6px;
    }
}

.lesson-word-table .lesson-word-table-row-header {
    text-align: left;
    font-weight: 600;
}

.lesson-word-table-audio {
    width: 48px;
}

.lesson-word-table-figure > figcaption {
    margin-top: 8px;
    font-size: 0.875rem;
    text-align: center;
    color: var(--lp-text-muted);
}

.lesson-ipa {
    font-family: "Segoe UI", "Noto Sans", "Lucida Sans Unicode", "Arial Unicode MS", sans-serif;
}

.lesson-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* ---------- Quiz ---------- */

.lesson-quiz {
    border: 1px solid var(--lp-border-soft);
    border-radius: 8px;
}

.lesson-quiz-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.lesson-quiz-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    align-items: start;
}

.lesson-quiz-prompt {
    font-weight: 600;
    margin-bottom: 8px;
}

.lesson-quiz-prompt .lesson-big-letter {
    margin: 0;
}

.lesson-quiz-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.lesson-quiz-option {
    text-transform: none;
}

.lesson-quiz-explanation {
    margin: 8px 0;
}

.lesson-quiz-choice-groups {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 16px;
    align-items: start;
}

/* Word column only as wide as the longest word; the answer column gets the rest. */
.lesson-quiz-choice-group table {
    table-layout: auto !important;
}

.lesson-quiz-choice-group th:first-child,
.lesson-quiz-choice-word {
    width: 1%;
    white-space: nowrap;
}

.lesson-quiz-choice-word {
    font-weight: 600;
}

/* Selects and the result icon share one row, so the icon always sits right of the last select. */
.lesson-quiz-choice-selects {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 4px;
}

.lesson-quiz-choice-group th,
.lesson-quiz-choice-group td {
    padding-left: 8px !important;
    padding-right: 8px !important;
}

.lesson-quiz-choice-select {
    flex: 0 0 68px;
    width: 68px;
    height: 32px;
    padding: 0 6px;
    border: 1px solid var(--mud-palette-lines-inputs);
    border-radius: 4px;
    background-color: transparent;
    color: var(--mud-palette-text-primary);
    font: inherit;
    cursor: pointer;
}

.lesson-quiz-choice-select:hover:not(:disabled) {
    border-color: var(--mud-palette-text-primary);
}

.lesson-quiz-choice-select:focus-visible {
    outline: 2px solid var(--mud-palette-primary);
    outline-offset: 1px;
}

.lesson-quiz-choice-select:disabled {
    opacity: 1;
    cursor: default;
}

.lesson-quiz-choice-select option {
    background-color: var(--mud-palette-surface);
    color: var(--mud-palette-text-primary);
}

.lesson-quiz-choice-result {
    display: inline-flex;
    flex: 0 0 24px;
    justify-content: center;
}

/* Grid quizzes (one question per letter): center prompt, options and buttons below the letter. */
.lesson-quiz-items-grid .lesson-quiz-question {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lesson-quiz-items-grid .lesson-quiz-options {
    justify-content: center;
}

.lesson-quiz-items-grid .lesson-quiz-question > .mud-alert {
    align-self: stretch;
}

.lesson-quiz-items-grid .lesson-quiz-explanation {
    align-self: stretch;
    text-align: center;
}

/* ---------- Comic ---------- */

.lesson-comic {
    border: 1px solid var(--lp-border-soft);
    border-radius: 8px;
    overflow: hidden;
}

.lesson-comic-panel {
    padding: 8px 16px 16px;
    outline: none;
}

.lesson-comic-panel:focus-visible {
    box-shadow: inset 0 0 0 2px var(--mud-palette-primary);
}

.lesson-comic-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--lp-border-soft);
}

/* L7000's robot voice in comics */
.comic-robot-text {
    font-family: "Courier New", Courier, monospace;
    font-size: 0.9em;
}

/* ---------- Style description (Fundamentals pages) ---------- */

.lesson-style-description {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 8px 24px;
    align-items: start;
    padding: 16px 0;
    border-top: 1px solid var(--lp-border-soft);
}

.lesson-style-description-image .lesson-figure.style-image {
    margin: 0;
}

.lesson-content .lesson-style-description h3 {
    margin-top: 0;
}

.lesson-style-description-code {
    margin-left: 6px;
    font-weight: 400;
    color: var(--lp-text-muted);
}

.lesson-style-description-mantra {
    margin: 8px 0;
    padding-left: 12px;
    border-left: 3px solid var(--mud-palette-primary);
    font-style: italic;
}

.lesson-style-description-used-for {
    color: var(--lp-text-main2);
}

@media (max-width: 600px) {
    .lesson-style-description {
        grid-template-columns: 1fr;
        justify-items: center;
    }

    .lesson-style-description-text {
        justify-self: stretch;
    }
}

/* Overview row of all styles of one kind, e.g. the five Mouth Shapes. */
.lesson-style-overview {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin: 16px 0;
}

.lesson-style-overview-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lesson-style-overview-note {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--lp-text-muted);
}

/* Simple → Precise mapping table */
.lesson-style-map {
    width: 100%;
    margin: 16px 0;
    border-collapse: collapse;
}

.lesson-style-map th,
.lesson-style-map td {
    padding: 6px 8px;
    border-bottom: 1px solid var(--lp-border-soft);
    text-align: left;
    vertical-align: top;
}

.lesson-style-map td .style-chip {
    margin: 2px 4px 2px 0;
}

/* Mad Ami's rambling that trails off in comics */
.comic-fade-text {
    font-size: 0.75em;
    opacity: 0.45;
}

/* Written style name that is not a chip (e.g. a mouth shape in a tongue column of the Reference Sheet) */
.style-token-unknown {
    font-size: 0.85em;
    font-style: italic;
    color: var(--lp-text-muted);
}

/* Letter grid (How to read IPA): one cell per letter, wraps on small screens */
.lesson-letter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
    gap: 6px;
    margin: 16px 0;
}

.lesson-letter-grid-ipa {
    grid-template-columns: repeat(auto-fill, minmax(116px, 1fr));
}

.lesson-letter-grid-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 4px;
    border: 1px solid var(--lp-border-soft);
    border-radius: 8px;
}

.lesson-letter-grid-main {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--lp-text-strong);
}

.lesson-letter-grid-ipa .lesson-letter-grid-main {
    font-size: 1.05rem;
    white-space: nowrap;
}

.lesson-letter-grid-sub {
    font-size: 0.75rem;
    color: var(--lp-text-muted);
}

/* Highlighted part of a word or IPA, e.g. the "a" in c-a-t and its sound /æ/ (same color as the letter grid) */
.lesson-highlight {
    font-weight: 700;
    color: var(--lp-text-strong);
}

/* ---------- Phoneme groups (Understanding Phonemes) ---------- */

.lesson-phoneme-group-title {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 12px;
}

.lesson-phoneme-group-nickname {
    font-size: 0.8em;
    font-weight: 500;
    color: var(--lp-text-muted);
}

/* Vault Markdown in lessons: callouts (HOW TO SAY) as boxes, nested ☆ steps indented */
.lesson-markdown blockquote {
    margin: 12px 0 16px;
    padding: 10px 14px;
    border-left: 4px solid var(--mud-palette-success);
    border-radius: 4px;
    background-color: color-mix(in srgb, var(--mud-palette-success) 8%, transparent);
}

.lesson-markdown blockquote blockquote {
    margin: 4px 0 8px 12px;
    padding: 4px 10px;
    border-left: 2px solid var(--lp-border-mid);
    background-color: transparent;
}

.lesson-markdown p {
    margin: 0 0 12px;
}

.lesson-markdown blockquote p:last-child {
    margin-bottom: 0;
}

.lesson-phoneme-picker {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 8px;
    margin: 12px 0 20px;
}

.lesson-phoneme-tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 8px;
    border: 1px solid var(--lp-border-soft);
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
}

.lesson-phoneme-tile:hover,
.lesson-phoneme-tile:focus-visible {
    border-color: var(--mud-palette-primary);
}

.lesson-phoneme-tile-selected {
    border-color: var(--mud-palette-primary);
    background-color: color-mix(in srgb, var(--mud-palette-primary) 10%, transparent);
}

.lesson-phoneme-tile-ipa {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--lp-text-strong);
}

.lesson-phoneme-tile-name {
    font-size: 0.8rem;
    text-align: center;
    color: var(--lp-text-muted);
}

.lesson-phoneme-tile {
    position: relative;
}

.lesson-phoneme-tile-done {
    border-color: var(--mud-palette-success);
    background-color: color-mix(in srgb, var(--mud-palette-success) 12%, transparent);
}

.lesson-phoneme-tile-done.lesson-phoneme-tile-selected {
    box-shadow: 0 0 0 2px var(--mud-palette-primary);
}

.lesson-phoneme-tile-check {
    position: absolute;
    top: 6px;
    right: 6px;
    color: var(--mud-palette-success);
}

.lesson-phoneme-done {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin: 8px 0 20px;
}

.lesson-footer-hint {
    color: var(--lp-text-muted);
}

/* Links to other lessons (LessonLink) and to sounds: always underlined, so they read as links */
.lesson-link {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.lesson-link-arrow::after {
    content: " →";
}

/* Obedience / Rebelliousness of a consonant family (ObedienceMeter) */
.lesson-obedience {
    margin: 12px 0 20px;
    border-collapse: collapse;
}

.lesson-obedience th,
.lesson-obedience td {
    padding: 4px 16px 4px 0;
    text-align: left;
    border-bottom: 1px solid var(--lp-border-soft);
}

.lesson-obedience tbody th {
    font-weight: 500;
}

.lesson-obedience-glyphs {
    font-size: 1.15rem;
    letter-spacing: 3px;
}

.lesson-obedience-on {
    color: var(--mud-palette-primary);
}

.lesson-obedience-off {
    color: var(--lp-text-muted);
}

/* Table header rows: tinted background and a stronger bottom line, so the header stands out from the body (Mark).
   Covers WordTable (MudSimpleTable), quiz choice tables, the style map, the obedience meter and Markdown tables.
   Colors come from --lp-table-head-bg / --lp-table-head-border in general.css. */
.lesson-word-table thead th,
.lesson-quiz-choice-group thead th,
.lesson-style-map thead th,
.lesson-obedience thead th,
.lesson-markdown thead th {
    background-color: var(--lp-table-head-bg) !important;
    color: var(--mud-palette-text-primary);
    font-weight: 700;
    border-bottom: 2px solid var(--lp-table-head-border) !important;
}