.page-lesson-topics,
.page-lesson-topic-detail {
    --lesson-ink: var(--color-text, #172033);
    --lesson-muted: var(--color-text-muted, #667085);
    --lesson-panel: rgba(var(--surface-rgb, 255, 255, 255), 0.82);
    --lesson-line: rgba(var(--border-rgb, 30, 41, 59), 0.12);
}

.lesson-topic-hero,
.lesson-topic-detail,
.lesson-topic-quizzes {
    position: relative;
}

.lesson-topic-hero h1,
.lesson-topic-detail__header h1 {
    max-width: 860px;
    margin-bottom: 1rem;
    letter-spacing: -0.04em;
}

.lesson-topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.lesson-topic-card,
.lesson-objective-card,
.lesson-content-block,
.lesson-topic-quiz-card {
    border: 1px solid var(--lesson-line);
    border-radius: 18px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.68)),
        var(--lesson-panel);
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.10);
}

html.dark-mode .lesson-topic-card,
html.dark-mode .lesson-objective-card,
html.dark-mode .lesson-content-block,
html.dark-mode .lesson-topic-quiz-card {
    background:
        linear-gradient(145deg, rgba(40, 52, 76, 0.92), rgba(31, 41, 62, 0.78)),
        rgba(33, 44, 66, 0.86);
}

.lesson-topic-card {
    min-height: 270px;
    padding: 1.3rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.lesson-topic-card h2 {
    margin: 0;
    font-size: clamp(1.35rem, 2vw, 1.8rem);
}

.lesson-topic-card__meta,
.lesson-topic-facts,
.lesson-topic-quiz-card__footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.lesson-topic-card__meta span,
.lesson-topic-facts span,
.lesson-topic-quiz-card__chip {
    border: 1px solid var(--lesson-line);
    border-radius: 999px;
    padding: 0.35rem 0.7rem;
    color: var(--lesson-muted);
    background: rgba(255, 255, 255, 0.48);
    font-size: 0.82rem;
    font-weight: 700;
}

.lesson-topic-card__sub,
.lesson-topic-detail__sub {
    color: var(--lesson-muted);
    font-size: 1.05rem;
}

.lesson-topic-card__objective {
    color: var(--lesson-muted);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.lesson-topic-card__action {
    margin-top: auto;
    width: auto;
    min-width: 9rem;
    align-self: flex-start;
}

@media (max-width: 480px) {
    .lesson-topic-card__action {
        width: 100%;
    }
}

.lesson-topic-breadcrumb {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    color: var(--lesson-muted);
}

.lesson-topic-breadcrumb a {
    color: inherit;
    text-decoration: none;
}

.lesson-topic-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0 1.35rem;
}

.lesson-topic-nav--bottom {
    margin-top: 1.5rem;
    margin-bottom: 0;
}

.lesson-topic-nav .btn {
    max-width: min(100%, 360px);
    white-space: normal;
    text-align: left;
}

.lesson-topic-nav .btn-primary {
    text-align: right;
    margin-left: auto;
}

.lesson-topic-nav__placeholder {
    color: var(--lesson-muted);
    border: 1px dashed var(--lesson-line);
    border-radius: 999px;
    padding: 0.55rem 0.9rem;
    font-size: 0.9rem;
}

.lesson-topic-detail__header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 340px);
    gap: 1.5rem;
    align-items: start;
    margin-bottom: 1.5rem;
}

.lesson-topic-facts {
    justify-content: flex-end;
}

.lesson-objective-card,
.lesson-content-block {
    padding: clamp(1.35rem, 2.2vw, 2rem);
}

.lesson-objective-card {
    margin-bottom: 1.25rem;
    border-color: rgba(var(--primary-rgb, 37, 99, 235), 0.28);
}

.lesson-content-stack {
    display: grid;
    gap: 1rem;
}

.lesson-content-block__label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    color: var(--lesson-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.72rem;
    font-weight: 800;
}

/* ── Blok tipine göre renk kodlaması ─────────────────────────────
   Her ders bloğu sol bir aksan rayı + renkli etiket taşır; uyarı ve
   ipucu blokları tam callout temasıyla taranabilir hale gelir. */
.lesson-content-block {
    --block-accent: var(--app-primary, #5f6fff);
    --block-accent-rgb: var(--app-primary-rgb, 95, 111, 255);
    position: relative;
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.lesson-content-block::before {
    content: "";
    position: absolute;
    left: 0;
    top: 1.4rem;
    bottom: 1.4rem;
    width: 5px;
    border-radius: 0 6px 6px 0;
    background: var(--block-accent);
    opacity: 0.85;
}

.lesson-content-block__label::before {
    content: "";
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--block-accent);
    box-shadow: 0 0 0 3px rgba(var(--block-accent-rgb), 0.16);
}

.lesson-content-block .lesson-content-block__label {
    color: var(--block-accent);
}

.lesson-content-block--intro {
    --block-accent: var(--app-secondary, #5ca7e8);
    --block-accent-rgb: var(--app-secondary-rgb, 92, 167, 232);
}
.lesson-content-block--rule {
    --block-accent: var(--app-primary, #5f6fff);
    --block-accent-rgb: var(--app-primary-rgb, 95, 111, 255);
}
.lesson-content-block--example {
    --block-accent: var(--app-accent, #3bbf98);
    --block-accent-rgb: var(--app-accent-rgb, 59, 191, 152);
}
.lesson-content-block--common_mistake {
    --block-accent: var(--app-danger, #ef5070);
    --block-accent-rgb: var(--app-danger-rgb, 239, 80, 112);
}
.lesson-content-block--practice_hint {
    --block-accent: var(--app-warning, #f0a030);
    --block-accent-rgb: var(--app-warning-rgb, 240, 160, 48);
}
.lesson-content-block--summary {
    --block-accent: #8b7cf6;
    --block-accent-rgb: 139, 124, 246;
}

/* Uyarı ve ipucu bloklarını hafif renk yıkamasıyla callout yap */
.lesson-content-block--common_mistake,
.lesson-content-block--practice_hint {
    background:
        linear-gradient(145deg, rgba(var(--block-accent-rgb), 0.07), rgba(var(--block-accent-rgb), 0.02)),
        var(--lesson-panel);
    border-color: rgba(var(--block-accent-rgb), 0.22);
}
html.dark-mode .lesson-content-block--common_mistake,
html.dark-mode .lesson-content-block--practice_hint {
    background:
        linear-gradient(145deg, rgba(var(--block-accent-rgb), 0.16), rgba(var(--block-accent-rgb), 0.05)),
        rgba(33, 44, 66, 0.86);
    border-color: rgba(var(--block-accent-rgb), 0.32);
}

.lesson-content-block h2,
.lesson-objective-card h2,
.lesson-topic-section-head h2 {
    margin-bottom: 0.75rem;
}

.lesson-objective-card p,
.lesson-content-block p {
    max-width: 82ch;
    margin-bottom: 0;
    font-size: clamp(1rem, 0.45vw + 0.92rem, 1.12rem);
    line-height: 1.78;
}

.lesson-example-list {
    display: grid;
    gap: 0.65rem;
    margin-top: 1.15rem;
}

.lesson-example {
    display: grid;
    gap: 0.2rem;
    padding: 0.85rem 1.05rem;
    border-radius: 14px;
    border-left: 3px solid rgba(var(--block-accent-rgb, var(--app-primary-rgb, 95, 111, 255)), 0.55);
    background: rgba(var(--block-accent-rgb, var(--app-primary-rgb, 95, 111, 255)), 0.07);
    transition: background 0.2s ease, transform 0.2s ease;
}

.lesson-example:hover {
    background: rgba(var(--block-accent-rgb, var(--app-primary-rgb, 95, 111, 255)), 0.12);
    transform: translateX(2px);
}

.lesson-example strong {
    font-size: 1.08rem;
}

.lesson-example span,
.lesson-example em,
.lesson-topic-quiz-card p {
    color: var(--lesson-muted);
}

.lesson-topic-section-head {
    margin-top: 2.75rem;
    margin-bottom: 1rem;
}

.lesson-topic-quiz-group {
    margin-bottom: 1.5rem;
}

.lesson-topic-quiz-group h3 {
    margin-bottom: 0.9rem;
}

.lesson-topic-quiz-card {
    height: 100%;
    padding: 1.15rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1rem;
}

.lesson-topic-quiz-card h4 {
    margin: 0.8rem 0 0.5rem;
}

.lesson-topic-quiz-card__footer {
    justify-content: space-between;
}

@media (max-width: 768px) {
    .lesson-topic-detail__header {
        grid-template-columns: 1fr;
    }

    .lesson-topic-facts {
        justify-content: flex-start;
    }

    .lesson-topic-nav {
        align-items: stretch;
        flex-direction: column;
    }

    .lesson-topic-nav .btn,
    .lesson-topic-nav .btn-primary {
        max-width: none;
        width: 100%;
        text-align: center;
        margin-left: 0;
    }

    .lesson-topic-nav__placeholder {
        text-align: center;
    }
}

/* Konunun quizleri — kalabalık görünümü akordeona aldık (varsayılan kapalı). */
.lesson-topic-quiz-hint {
    color: var(--lesson-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.lesson-topic-quiz-accordion {
    --bs-accordion-bg: transparent;
    --bs-accordion-border-color: var(--lesson-line);
    --bs-accordion-border-radius: 1rem;
    --bs-accordion-inner-border-radius: 1rem;
    --bs-accordion-btn-color: var(--lesson-ink);
    --bs-accordion-active-color: var(--lesson-ink);
    --bs-accordion-active-bg: rgba(var(--app-primary-rgb), 0.08);
    --bs-accordion-btn-focus-box-shadow: 0 0 0 0.2rem rgba(var(--app-primary-rgb), 0.18);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.lesson-topic-quiz-accordion .accordion-item {
    background: var(--lesson-panel);
    border: 1px solid var(--lesson-line);
    border-radius: 1rem;
    overflow: hidden;
}

.lesson-topic-quiz-accordion .accordion-button {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    border-radius: 1rem;
}

.lesson-topic-quiz-accordion .accordion-button:not(.collapsed) {
    box-shadow: none;
}

.lesson-topic-quiz-accordion .lesson-topic-skill-name {
    flex: 1 1 auto;
}

.lesson-topic-quiz-count {
    flex: 0 0 auto;
    font-size: 0.78rem;
    font-weight: 600;
    color: rgb(var(--app-primary-rgb));
    background: rgba(var(--app-primary-rgb), 0.12);
    border-radius: 999px;
    padding: 0.18rem 0.7rem;
}