/* ==========================================================================
   Learn overview: TrackExplorer, TrackSectionBlock, TrackLessonRow (tasks/UiRedesign.md, Phase 3).
   Layout: head with path switch, "continue" card, chapters as an accordion.
   ========================================================================== */

.lp-page {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 28px 24px;
}

.lp-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
}

.lp-head-text {
    display: grid;
    gap: 6px;
}

/* ---------- Continue card ---------- */

.lp-continue {
    display: grid;
    gap: 8px;
    padding: 28px 32px;
    border-radius: var(--en-radius-xl);
    background: var(--en-hero-bg);
    color: var(--en-hero-ink);
}

.lp-continue-kicker {
    font-size: 0.9rem;
    opacity: .85;
}

.lp-continue-title {
    margin: 0;
    color: inherit;
    font: 650 1.9rem/1.15 var(--en-font-display);
    letter-spacing: -0.02em;
}

.lp-continue-desc {
    max-width: 40em;
    margin: 0;
    line-height: 1.55;
    opacity: .92;
}

.lp-continue-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    margin-top: 14px;
}

/* White button on the coloured card, in both modes */
.lp-continue .lp-continue-button {
    background: #FFFFFF;
    color: #2A1E8C;
}

.lp-continue .lp-continue-button:hover {
    background: #F0EEFF;
    color: #2A1E8C;
}

.lp-continue-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
}

.lp-continue-progress .en-progress {
    width: 140px;
    background: rgba(255, 255, 255, .25);
}

.lp-continue-progress .en-progress > span {
    background: #FFFFFF;
}

.lp-finished {
    margin: 0;
}

/* ---------- Chapters ---------- */

.lp-chapters-title {
    margin-top: 12px;
}

.lp-chapters {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.lp-chapter {
    overflow: hidden;
    border: 1px solid var(--en-line);
    border-radius: var(--en-radius-lg);
    background: var(--en-surface);
    box-shadow: var(--en-shadow-1);
}

.lp-chapter-head {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 170px 22px;
    gap: 18px;
    align-items: center;
    width: 100%;
    padding: 16px 18px;
    border: 0;
    background: transparent;
    color: inherit;
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.lp-chapter-head:hover {
    background: color-mix(in srgb, var(--en-surface-2) 60%, transparent);
}

.lp-chapter-head:focus-visible {
    outline: 2px solid var(--en-mouth);
    outline-offset: -2px;
}

.lp-chapter-num {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--en-surface-2);
    color: var(--en-ink-soft);
    font: 650 1rem/1 var(--en-font-display);
}

.lp-chapter.is-open .lp-chapter-num {
    background: var(--en-mouth);
    color: var(--en-on-accent);
}

.lp-chapter.is-done .lp-chapter-num {
    background: var(--en-done-soft);
    color: var(--en-done);
}

.lp-chapter.is-locked .lp-chapter-num {
    color: var(--en-ink-muted);
}

.lp-chapter-text {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.lp-chapter-title {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.lp-chapter-name {
    font: 650 1.08rem/1.25 var(--en-font-display);
    letter-spacing: -0.01em;
}

.lp-chapter-summary {
    font-size: 0.92rem;
    color: var(--en-ink-soft);
}

.lp-chapter.is-locked .lp-chapter-summary {
    color: var(--en-ink-muted);
}

.lp-chapter-progress {
    display: grid;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--en-ink-muted);
}

.lp-chapter-chevron {
    color: var(--en-ink-muted);
    transition: transform .2s;
}

.lp-chapter.is-open .lp-chapter-chevron {
    transform: rotate(180deg);
}

.lp-chapter-body {
    display: grid;
    gap: 18px;
    padding: 4px 18px 20px 80px;
}

.lp-chapter-desc {
    max-width: 60em;
    margin: 0;
    color: var(--en-ink-soft);
}

.lp-locked-note {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    background: var(--en-pro-soft);
    color: var(--en-ink-soft);
    font-size: 0.92rem;
}

.lp-locked-note > .en-icon {
    color: var(--en-pro);
}

.lp-locked-note .en-btn {
    margin-left: auto;
}

/* ---------- Modules and lessons ---------- */

.lp-section {
    display: grid;
    gap: 6px;
    scroll-margin-top: 80px;
}

.lp-section-head {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.lp-section-title {
    margin: 0;
    font: 650 0.98rem/1.3 var(--en-font-display);
}

.lp-section-count {
    font-size: 0.82rem;
    color: var(--en-ink-muted);
}

.lp-section-summary {
    margin: 0;
    font-size: 0.9rem;
    color: var(--en-ink-soft);
}

.lp-lessons {
    margin: 0;
    padding: 0;
    border-left: 2px solid var(--en-line);
    list-style: none;
}

.lp-lesson {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: -2px;
    padding: 8px 12px;
    border-left: 2px solid transparent;
    color: var(--en-ink-soft);
    text-decoration: none;
}

a.lp-lesson:hover {
    background: var(--en-surface-2);
    color: var(--en-ink);
}

a.lp-lesson:focus-visible {
    outline: 2px solid var(--en-mouth);
    outline-offset: -2px;
}

.lp-lesson-state {
    display: grid;
    flex: none;
    place-items: center;
    width: 22px;
    height: 22px;
    border: 1.5px solid var(--en-line-strong);
    border-radius: 50%;
}

.lp-lesson.is-done .lp-lesson-state {
    border-color: var(--en-done);
    background: var(--en-done);
    color: var(--en-on-accent);
}

.lp-lesson.is-locked .lp-lesson-state {
    border-style: dashed;
    color: var(--en-ink-muted);
}

.lp-lesson.is-next {
    border-left-color: var(--en-mouth);
    background: var(--en-mouth-soft);
    color: var(--en-ink);
}

.lp-lesson.is-next .lp-lesson-state {
    border-color: var(--en-mouth);
}

.lp-lesson-text {
    display: grid;
    gap: 2px;
    min-width: 0;
}

.lp-lesson-title {
    font-size: 0.95rem;
    font-weight: 600;
}

.lp-lesson-summary {
    font-size: 0.86rem;
    color: var(--en-ink-muted);
}

.lp-lesson-locked {
    font-size: 0.82rem;
    color: var(--en-pro);
}

.lp-lesson-next {
    margin-left: auto;
}

/* ---------- Small screens ---------- */

@media (max-width: 960px) {
    .lp-page {
        padding: 24px 16px;
    }

    .lp-continue {
        padding: 24px;
    }

    .lp-chapter-head {
        grid-template-columns: 40px minmax(0, 1fr) 22px;
        gap: 14px;
        padding: 14px;
    }

    .lp-chapter-progress {
        grid-row: 2;
        grid-column: 2;
    }

    .lp-chapter-chevron {
        grid-row: 1;
        grid-column: 3;
    }

    .lp-chapter-body {
        padding: 0 14px 16px;
    }
}

@media (max-width: 560px) {
    .lp-continue-title {
        font-size: 1.5rem;
    }

    .lp-locked-note .en-btn {
        margin-left: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .lp-chapter-chevron {
        transition: none;
    }
}

/* /Practice (no Practice Paths yet): the button back to Learn keeps its own width */
.practice-to-learn {
    align-self: flex-start;
}