.course-overview {
    --course-bg: #ffffff;
    --course-surface: #ffffff;
    --course-surface-soft: #f7f9fc;
    --course-chip: #f1f3f5;
    --course-text: #161a22;
    --course-muted: #667085;
    --course-border: #dfe3e8;
    --course-border-strong: #cdd4dc;
    --course-accent: var(--course-brand);
    --course-accent-hover: #004b98;
    --course-accent-soft: #eef6ff;
    min-height: 100vh;
    background: var(--course-bg);
    color: var(--course-text);
}

html[data-theme="dark"] .course-overview {
    --course-bg: #0b1020;
    --course-surface: #11182a;
    --course-surface-soft: #171f33;
    --course-chip: #202a40;
    --course-text: #f4f7fb;
    --course-muted: #a9b4c7;
    --course-border: #303a51;
    --course-border-strong: #44516c;
    --course-accent: #62b5ff;
    --course-accent-hover: #8ac8ff;
    --course-accent-soft: #142c46;
}

.course-overview__crumbbar {
    display: none;
}

.course-overview__crumbs {
    display: flex;
    min-height: 3.15rem;
    max-width: 70.5rem;
    align-items: center;
    gap: .42rem;
    margin: 0 auto;
    padding: .7rem 1.35rem;
    color: var(--course-muted);
    font-size: .875rem;
    line-height: 1.35;
}

.course-overview__crumbs a {
    border-radius: .2rem;
    color: var(--course-muted);
}

.course-overview__crumbs a:hover { color: var(--course-accent); }
.course-overview__crumbs strong { color: var(--course-text); font-weight: 700; }
.course-overview__crumb-separator { color: var(--course-border-strong); }

.course-overview__status {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    margin-left: .2rem;
    background: #dff5e6;
    padding: .2rem .48rem;
    color: #167342;
    font-size: .7rem;
    font-weight: 700;
    line-height: 1;
}

html[data-theme="dark"] .course-overview__status { background: #183d2b; color: #8ce3b1; }

.course-overview__layout {
    display: grid;
    grid-template-columns: minmax(0, 49rem) minmax(18rem, 20rem);
    grid-template-areas:
        "intro aside"
        "curriculum aside"
        "about aside"
        "reviews aside";
    column-gap: 2.5rem;
    row-gap: 2.25rem;
    width: min(100%, 76rem);
    margin: 0 auto;
    padding: 1.15rem 1.35rem 3.5rem;
}

.course-overview__intro { grid-area: intro; min-width: 0; }
.course-overview__aside { grid-area: aside; align-self: start; }
.course-overview__curriculum { grid-area: curriculum; min-width: 0; }
.course-overview__about { grid-area: about; min-width: 0; }
.course-overview__reviews { grid-area: reviews; min-width: 0; }

.course-overview__title {
    max-width: 48rem;
    margin: 0;
    color: var(--course-text);
    font-size: clamp(1.55rem, 2.2vw, 1.82rem);
    font-weight: 760;
    letter-spacing: -.025em;
    line-height: 1.2;
    text-wrap: balance;
}

.course-overview__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .7rem 1.15rem;
    margin-top: 1rem;
    color: var(--course-text);
    font-size: .875rem;
}

.course-overview__meta-item { display: inline-flex; align-items: center; gap: .45rem; }
.course-overview__meta-divider { color: var(--course-muted); }
.course-overview__icon { width: 1rem; height: 1rem; flex: 0 0 auto; color: var(--course-muted); }

.course-overview__avatar {
    display: inline-grid;
    width: 1.55rem;
    height: 1.55rem;
    place-items: center;
    border: 1px solid var(--course-border);
    border-radius: 999px;
    background: var(--course-chip);
    color: var(--course-muted);
    font-size: .75rem;
}

.course-overview__tags { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: 1rem; }
.course-overview__tag {
    display: inline-flex;
    border-radius: 999px;
    background: var(--course-chip);
    padding: .3rem .58rem;
    color: var(--course-muted);
    font-size: .76rem;
    line-height: 1;
}

.course-overview__lead {
    max-width: 45rem;
    margin: 1rem 0 0;
    color: var(--course-text);
    font-size: .92rem;
    line-height: 1.65;
}

.course-progress { margin-top: 1.1rem; }
.course-progress__label { display: flex; justify-content: space-between; gap: 1rem; color: var(--course-muted); font-size: .76rem; font-weight: 650; }
.course-progress__track { height: .32rem; overflow: hidden; margin-top: .42rem; border-radius: 999px; background: var(--course-chip); }
.course-progress__bar { height: 100%; border-radius: inherit; background: var(--course-accent); }

.course-overview__section-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: .85rem;
}

.course-overview__section-heading h2,
.course-overview__about h2 {
    margin: 0;
    color: var(--course-text);
    font-size: 1.28rem;
    font-weight: 760;
    letter-spacing: -.015em;
}

.course-overview__section-heading p { color: var(--course-muted); font-size: .82rem; white-space: nowrap; }

.course-curriculum {
    overflow: hidden;
    border: 1px solid var(--course-border);
    border-radius: .65rem;
    background: var(--course-surface);
}

.course-module + .course-module { border-top: 1px solid var(--course-border); }
.course-module__summary {
    display: grid;
    grid-template-columns: 1.1rem minmax(0, 1fr) auto;
    min-height: 3.15rem;
    cursor: pointer;
    align-items: center;
    gap: .65rem;
    padding: .68rem 1rem;
    color: var(--course-text);
    list-style: none;
}

.course-module__summary::-webkit-details-marker { display: none; }
.course-module__summary:hover { background: var(--course-surface-soft); }
.course-module__summary:focus-visible { outline: 3px solid rgba(8, 119, 221, .28); outline-offset: -3px; }
.course-module__chevron { width: .85rem; height: .85rem; color: var(--course-muted); transition: transform .18s ease; }
.course-module[open] .course-module__chevron { transform: rotate(90deg); }
.course-module__title { overflow-wrap: anywhere; font-size: .9rem; font-weight: 700; }
.course-module__count { color: var(--course-muted); font-size: .78rem; }
.course-module__lessons { padding: 0 .65rem .55rem 2.3rem; }

.course-lesson {
    display: grid;
    grid-template-columns: 1.1rem minmax(0, 1fr) auto;
    min-height: 2.3rem;
    align-items: center;
    gap: .55rem;
    border-radius: .35rem;
    padding: .4rem .35rem;
    color: var(--course-text);
    font-size: .8rem;
}

a.course-lesson:hover { background: var(--course-accent-soft); color: var(--course-accent); }
a.course-lesson:focus-visible { outline: 3px solid rgba(8, 119, 221, .25); outline-offset: 0; }
.course-lesson__icon { width: .9rem; height: .9rem; color: var(--course-muted); }
.course-lesson__type { color: var(--course-muted); font-size: .7rem; }
.course-lesson__complete { color: #078451; font-size: .8rem; font-weight: 800; }
.course-curriculum__empty { padding: 1.2rem; color: var(--course-muted); font-size: .85rem; }

.course-overview__about { display: grid; gap: 1.6rem; padding-top: .15rem; }
.course-overview__copy { color: var(--course-text); font-size: .88rem; line-height: 1.62; }
.course-overview__copy p + p { margin-top: .65rem; }
.course-overview__subsection h3 { margin: 0 0 .7rem; color: var(--course-text); font-size: 1rem; font-weight: 760; }
.course-overview__list { display: grid; gap: .58rem; padding-left: 1.5rem; color: var(--course-text); font-size: .85rem; line-height: 1.45; list-style: disc; }
.course-overview__list li::marker { color: var(--course-border-strong); }
.course-overview__format { color: var(--course-text); font-size: .85rem; line-height: 1.55; }
.course-overview__format strong { font-weight: 760; }

.course-sidebar-card {
    border: 2px solid var(--course-border);
    border-radius: .7rem;
    background: var(--course-surface);
    padding: 1.25rem;
    box-shadow: none;
}

.course-sidebar-card + .course-sidebar-card { margin-top: 1.45rem; }
.course-sidebar-card__price { color: var(--course-text); font-size: 1.25rem; font-weight: 780; letter-spacing: -.02em; }
.course-sidebar-card__old-price { margin-top: .2rem; color: var(--course-muted); font-size: .8rem; }
.course-sidebar-card__actions { display: grid; gap: .55rem; margin-top: .85rem; }

.course-primary-action,
.course-secondary-action {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    gap: .55rem;
    border-radius: .45rem;
    padding: .65rem .9rem;
    font-size: .82rem;
    font-weight: 720;
    line-height: 1.2;
    text-align: center;
}

.course-primary-action { border: 1px solid var(--course-accent); background: var(--course-accent); color: #fff; }
.course-primary-action:hover { border-color: var(--course-accent-hover); background: var(--course-accent-hover); }
.course-secondary-action { border: 1px solid var(--course-border-strong); background: var(--course-surface); color: var(--course-text); }
.course-secondary-action:hover { border-color: var(--course-accent); color: var(--course-accent); }
.course-primary-action svg,.course-secondary-action svg { width: 1rem; height: 1rem; }

.course-sidebar-card__notice { margin-top: .85rem; border-radius: .4rem; background: var(--course-accent-soft); padding: .65rem; color: var(--course-text); font-size: .76rem; line-height: 1.45; }
.course-sidebar-card__heading { margin: 1.8rem 0 .75rem; color: var(--course-text); font-size: .85rem; font-weight: 520; }
.course-sidebar-facts { display: grid; gap: .85rem; }
.course-sidebar-fact { display: grid; grid-template-columns: 1rem minmax(0, 1fr); align-items: center; gap: .7rem; color: var(--course-text); font-size: .82rem; }
.course-sidebar-fact svg { width: 1rem; height: 1rem; color: var(--course-muted); }
.course-sidebar-links { display: flex; flex-wrap: wrap; gap: .45rem 1rem; margin-top: 1rem; border-top: 1px solid var(--course-border); padding-top: .85rem; }
.course-sidebar-links a { color: var(--course-accent); font-size: .75rem; font-weight: 700; }
.course-sidebar-links a:hover { text-decoration: underline; text-underline-offset: 3px; }

.course-creator-card__label { color: var(--course-muted); font-size: .72rem; font-weight: 750; letter-spacing: .03em; text-transform: uppercase; }
.course-creator-card__person { display: flex; align-items: center; gap: .85rem; margin-top: .75rem; }
.course-creator-card__avatar { display: grid; width: 2.6rem; height: 2.6rem; flex: 0 0 auto; place-items: center; border: 1px solid var(--course-border); border-radius: 999px; background: var(--course-chip); color: var(--course-muted); font-size: 1rem; }
.course-creator-card__name { color: var(--course-text); font-size: .84rem; font-weight: 700; }
.course-creator-card__name:hover { color: var(--course-accent); }

.course-rating-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-top: 1px solid var(--course-border); padding-top: 1.35rem; }
.course-rating-row__score { display: flex; align-items: center; gap: .5rem; color: var(--course-text); font-size: .88rem; }
.course-rating-row__star { color: #e7b008; font-size: 1.3rem; line-height: 1; }
.course-rating-row__score strong { font-size: 1.2rem; }
.course-review-toggle summary { cursor: pointer; list-style: none; }
.course-review-toggle summary::-webkit-details-marker { display: none; }
.course-review-form { margin-top: 1rem; border: 1px solid var(--course-border); border-radius: .6rem; background: var(--course-surface-soft); padding: 1rem; }
.course-review-form fieldset { border: 0; padding: 0; }
.course-review-form__ratings { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: .5rem; }
.course-review-form label { color: var(--course-text); font-size: .8rem; font-weight: 650; }
.course-review-form textarea { min-height: 7rem; margin-top: .4rem; }
.course-review-list { display: grid; gap: 1rem; margin-top: 1.25rem; }
.course-review { border-top: 1px solid var(--course-border); padding-top: 1rem; }
.course-review__head { display: flex; justify-content: space-between; gap: 1rem; color: var(--course-text); font-size: .78rem; }
.course-review__head strong { font-weight: 750; }
.course-review__body { margin-top: .45rem; color: var(--course-muted); font-size: .82rem; line-height: 1.55; }

.course-preview-notice { border-bottom: 1px solid #f0d38a; background: #fff6d8; color: #684b00; }
.course-preview-notice__inner { display: flex; max-width: 70.5rem; align-items: center; justify-content: space-between; gap: 1rem; margin: 0 auto; padding: .7rem 1.35rem; font-size: .8rem; font-weight: 650; }
.course-preview-notice a { text-decoration: underline; text-underline-offset: 3px; }

/* The quiz uses the same learning-room shell as every other course material. */
.course-quiz {
    --quiz-line: #dce4ed;
    --quiz-muted: #637189;
    min-height: 100dvh;
    background: #fff;
    color: #14233b;
}

.course-quiz__crumb { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.course-quiz__layout { display: grid; min-height: calc(100dvh - 3rem); grid-template-columns: minmax(0, 70%) minmax(20rem, 30%); }
.course-quiz__main { min-width: 0; padding: 1.4rem clamp(1.25rem, 2.5vw, 2.75rem) 4rem; }
.course-quiz__intro { border-bottom: 1px solid var(--quiz-line); padding: .35rem 0 1.25rem; }
.course-quiz__eyebrow { color: var(--course-brand); font-size: .68rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.course-quiz__intro h1 { margin-top: .45rem; color: #101828; font-size: clamp(1.45rem, 2.2vw, 1.8rem); font-weight: 780; letter-spacing: -.025em; line-height: 1.22; }
.course-quiz__author { display: flex; align-items: center; gap: .45rem; margin-top: .75rem; color: #475467; font-size: .78rem; }
.course-quiz__author > span { display: grid; width: 1.5rem; height: 1.5rem; place-items: center; border: 1px solid var(--quiz-line); border-radius: 50%; background: #f4f7fa; font-size: .68rem; }
.course-quiz__instructions { margin-top: 1.25rem; border-radius: .55rem; background: var(--course-brand-soft); padding: 1rem 1.15rem; color: #0056a8; font-size: .84rem; line-height: 1.55; }
.course-quiz__instructions strong { display: block; font-weight: 780; }
.course-quiz__instructions p { margin-top: .35rem; }
.course-quiz__instructions ul { margin-top: .4rem; padding-left: 1.25rem; list-style: decimal; }
.course-quiz__result { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 1.25rem; border: 1px solid #f3c879; border-radius: .5rem; background: #fff8e8; padding: .8rem 1rem; color: #854d0e; font-size: .82rem; }
.course-quiz__result.is-passed { border-color: #a7dfc4; background: #effbf5; color: #067647; }
.course-quiz__paper { margin-top: 1.25rem; border: 1px solid var(--quiz-line); border-radius: .55rem; background: #fff; }
.course-quiz__form { display: grid; gap: 0; }
.course-quiz__question { border: 0; border-bottom: 1px solid var(--quiz-line); padding: 1.3rem; }
.course-quiz__question legend { display: flex; align-items: flex-start; gap: .65rem; width: 100%; color: #101828; font-size: .92rem; font-weight: 750; line-height: 1.45; }
.course-quiz__question legend > span { display: grid; width: 1.45rem; height: 1.45rem; flex: 0 0 auto; place-items: center; border-radius: .35rem; background: #edf5ff; color: var(--course-brand); font-size: .72rem; }
.course-quiz__choices { display: grid; gap: .5rem; margin-top: .85rem; padding-left: 2.1rem; }
.course-quiz__choices label { display: flex; min-height: 2.75rem; cursor: pointer; align-items: center; gap: .7rem; border: 1px solid var(--quiz-line); border-radius: .45rem; padding: .55rem .75rem; color: #344054; font-size: .82rem; transition: border-color .15s ease, background-color .15s ease; }
.course-quiz__choices label:hover { border-color: #8bbbe6; background: #f7fbff; }
.course-quiz__choices label:has(input:checked) { border-color: var(--course-brand); background: #edf6ff; color: #003f7d; }
.course-quiz__choices input { width: 1rem; height: 1rem; accent-color: var(--course-brand); }
.course-quiz__form > .course-primary-action,
.course-quiz__form > .course-sidebar-card__notice { margin: 1.25rem; justify-self: start; }
.course-quiz__empty { padding: 5rem 1.5rem; text-align: center; }
.course-quiz__empty strong { color: #101828; font-size: 1rem; }
.course-quiz__empty p { margin-top: .4rem; color: var(--quiz-muted); font-size: .82rem; }

.course-quiz__curriculum { min-width: 0; border-left: 1px solid var(--quiz-line); background: #fff; }
.course-quiz__curriculum-sticky { position: sticky; top: 3rem; max-height: calc(100dvh - 3rem); overflow-y: auto; }
.course-quiz__curriculum-head { border-bottom: 1px solid var(--quiz-line); padding: 1.15rem 1.2rem; }
.course-quiz__curriculum-head > div:first-child { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.course-quiz__curriculum-head p { color: var(--course-brand); font-size: .66rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.course-quiz__curriculum-head a { color: var(--course-brand); font-size: .72rem; font-weight: 700; }
.course-quiz__curriculum-head h2 { margin-top: .35rem; color: #101828; font-size: 1rem; font-weight: 780; }
.course-quiz__progress-label { margin-top: .85rem; color: var(--quiz-muted); font-size: .72rem; }
.course-quiz__progress-label strong { color: #101828; }
.course-quiz__progress-track { height: .3rem; overflow: hidden; margin-top: .4rem; border-radius: 99px; background: #e6ebf1; }
.course-quiz__progress-track span { display: block; height: 100%; border-radius: inherit; background: var(--course-brand); }
.course-quiz__modules > li { border-bottom: 1px solid var(--quiz-line); }
.course-quiz__modules summary { display: flex; min-height: 4rem; cursor: pointer; align-items: center; justify-content: space-between; gap: .8rem; padding: .75rem 1rem; list-style: none; background: #f9fafb; }
.course-quiz__modules summary::-webkit-details-marker { display: none; }
.course-quiz__modules summary small { display: block; color: #718096; font-size: .62rem; font-weight: 760; letter-spacing: .11em; text-transform: uppercase; }
.course-quiz__modules summary strong { display: block; margin-top: .18rem; color: #172033; font-size: .78rem; line-height: 1.35; }
.course-quiz__modules details[open] summary > span:last-child { transform: rotate(180deg); }
.course-quiz__material { display: grid; grid-template-columns: 1.55rem minmax(0, 1fr); gap: .65rem; border-left: 3px solid transparent; padding: .72rem .85rem; }
.course-quiz__material:hover { background: #f7f9fc; }
.course-quiz__material.is-current { border-left-color: var(--course-brand); background: #eaf4ff; }
.course-quiz__material-icon { display: grid; width: 1.5rem; height: 1.5rem; place-items: center; border: 1px solid #c9d8e7; border-radius: .35rem; background: #fff; color: #35617f; font-size: .72rem; font-weight: 800; }
.course-quiz__material.is-current .course-quiz__material-icon { border-color: #76b6ed; color: var(--course-brand); }
.course-quiz__material strong { display: block; color: #344054; font-size: .76rem; line-height: 1.35; }
.course-quiz__material small { display: block; margin-top: .18rem; color: #718096; font-size: .65rem; line-height: 1.35; }
.course-quiz__material.is-current small { color: var(--course-brand); font-weight: 700; }

@media (min-width: 900px) {
    .course-overview__aside { position: sticky; top: 5.8rem; }
}

@media (max-width: 899px) {
    .course-overview__layout {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas: "intro" "aside" "curriculum" "about" "reviews";
        row-gap: 1.75rem;
    }
    .course-overview__aside { width: min(100%, 32rem); }
    .course-quiz__layout { grid-template-columns: minmax(0, 1fr); }
    .course-quiz__curriculum { border-top: 1px solid var(--quiz-line); border-left: 0; }
    .course-quiz__curriculum-sticky { position: static; max-height: none; }
}

@media (max-width: 560px) {
    .course-overview__crumbs,
    .course-overview__layout,
    .course-preview-notice__inner { padding-right: 1rem; padding-left: 1rem; }
    .course-overview__crumbs { align-items: flex-start; overflow: hidden; }
    .course-overview__crumbs strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .course-overview__layout { padding-top: 1rem; padding-bottom: 2.5rem; }
    .course-overview__meta-divider { display: none; }
    .course-overview__section-heading { align-items: flex-start; }
    .course-overview__section-heading p { white-space: normal; text-align: right; }
    .course-module__summary { min-height: 3.25rem; padding-right: .8rem; padding-left: .8rem; }
    .course-module__lessons { padding-left: 1.55rem; }
    .course-lesson { grid-template-columns: 1rem minmax(0, 1fr); min-height: 2.75rem; }
    .course-lesson__type { display: none; }
    .course-rating-row { align-items: flex-start; flex-direction: column; }
    .course-preview-notice__inner { align-items: flex-start; flex-direction: column; }
    .course-quiz__main { padding: 1rem 1rem 2.5rem; }
    .course-quiz__instructions { padding: .85rem; }
    .course-quiz__result { align-items: flex-start; flex-direction: column; }
    .course-quiz__question { padding: 1rem; }
    .course-quiz__choices { padding-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .course-module__chevron { transition: none; }
}

/* Course catalogue detail: reference hero and three content tabs. */
.course-app-page .course-app-shell { background: #f3f7fc; }
.course-overview {
    --course-bg: #f3f7fc;
    --course-text: #203550;
    --course-muted: #607895;
    --course-border: #dce6f2;
    --course-accent: #0869ca;
    --course-accent-hover: #0757ad;
    min-height: 100dvh;
    padding: 0 clamp(1rem, 4vw, 3rem) 4rem;
}
.course-overview__crumbbar { display: block; max-width: 78.25rem; margin: 0 auto; }
.course-overview__crumbs { max-width: none; min-height: 4.5rem; padding: 1.2rem 0; }
.course-overview__crumbs a { color: #0869ca; }
.course-overview__crumbs strong { color: #607895; font-weight: 500; }
.course-overview__hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(11rem, 15.25rem) minmax(0, 1fr) minmax(12.5rem, 14.5rem);
    align-items: center;
    gap: clamp(1.5rem, 2vw, 2.5rem);
    max-width: 78.25rem;
    min-height: 21.75rem;
    overflow: hidden;
    margin: 0 auto 2.5rem;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: 1.15rem;
    background: linear-gradient(110deg,#103160 0%,#0b53ac 57%,#0878b4 100%);
    padding: clamp(1.5rem,2.4vw,2rem);
    color: #fff;
}
.course-overview__hero::after {
    content: "";
    position: absolute;
    top: -16rem;
    right: -8rem;
    width: 32rem;
    height: 32rem;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 50%;
    box-shadow: 0 0 0 4rem rgba(255,255,255,.025),0 0 0 8rem rgba(255,255,255,.018);
    pointer-events: none;
}
.course-overview__hero > * { position: relative; z-index: 1; min-width: 0; }
.course-overview__hero > .course-overview__cover { grid-column: 1; }
.course-overview__hero > .course-overview__intro { grid-area: auto; grid-column: 2; }
.course-overview__hero > .course-overview__aside { grid-area: auto; grid-column: 3; }
.course-overview__cover {
    display: flex;
    min-height: 12.25rem;
    aspect-ratio: 1.25;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-end;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: .7rem;
    background: linear-gradient(155deg,#16447f,#091f3b);
    padding: 1.15rem;
    box-shadow: 0 1.2rem 2rem rgba(4,25,54,.17);
}
.course-overview__cover > img:not(.course-overview__cover-logo) { width: 100%; height: 100%; object-fit: cover; }
.course-overview__cover:has(> img:not(.course-overview__cover-logo)),.course-overview__cover:has(> iframe) { padding: 0; }
.course-overview__cover iframe { width: 100%; height: 100%; min-height: 12.25rem; border: 0; }
.course-overview__cover-brand { margin-bottom: auto; color: #adcaec; font-size: .57rem; font-weight: 800; letter-spacing: .1em; }
.course-overview__cover-logo { width: 3.7rem; height: 3.7rem; margin-bottom: .55rem; object-fit: contain; }
.course-overview__cover strong { color: #fff; font-size: clamp(1rem,1.45vw,1.4rem); line-height: 1.15; overflow-wrap: anywhere; }
.course-overview__title { max-width: 19ch; color: #fff; font-size: clamp(2rem,2.8vw,2.55rem); font-weight: 800; line-height: 1.08; }
.course-overview__eyebrow { margin-bottom: .7rem; color: #b9d9fc; font-size: .75rem; font-weight: 750; }
.course-overview__lead { max-width: 56ch; margin-top: 1rem; color: #c7ddf5; font-size: .9rem; line-height: 1.6; }
.course-overview__social { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-top: 1.1rem; color: #d2e7ff; font-size: .82rem; }
.course-overview__social a { color: #d2e7ff; text-decoration: underline; text-underline-offset: .3rem; }
.course-overview__social a:hover { color: #fff; }
.course-overview__stars { color: #ffcb4b; letter-spacing: .08em; }
.course-overview__facts { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: .85rem; margin-top: 1.5rem; }
.course-overview__facts > div { min-width: 0; border-right: 1px solid rgba(255,255,255,.15); padding-right: .65rem; }
.course-overview__facts > div:last-child { border-right: 0; }
.course-overview__facts dt { color: #b9d5f1; font-size: .68rem; }
.course-overview__facts dd { margin-top: .25rem; color: #fff; font-size: .84rem; font-weight: 750; overflow-wrap: anywhere; }
.course-overview__hero .course-overview__meta,.course-overview__hero .course-overview__tags { display: none; }
.course-overview__hero .course-progress { max-width: 36rem; margin-top: 1.15rem; }
.course-overview__hero .course-progress__label { color: #d3e7ff; }
.course-overview__hero .course-progress__track { background: rgba(255,255,255,.2); }
.course-overview__hero .course-progress__bar { background: #74d7bd; }
.course-overview__aside { align-self: center; }
.course-overview__aside .course-sidebar-card { border: 0; border-radius: 0; background: none; padding: 0; box-shadow: none; }
.course-overview__aside .course-sidebar-card__caption { color: #c0d9f6; font-size: .78rem; }
.course-overview__aside .course-sidebar-card__price { margin-top: .25rem; color: #fff; font-size: 1.95rem; font-weight: 800; line-height: 1.12; }
.course-overview__aside .course-sidebar-card__payment,.course-overview__aside .course-sidebar-card__old-price { margin-top: .35rem; color: #c6dcf5; font-size: .73rem; }
.course-overview__aside .course-sidebar-card__video-notice { margin-top: .5rem; color: #c6dcf5; font-size: .73rem; }
.course-overview__aside .course-sidebar-card__actions { margin-top: 1.05rem; }
.course-overview__aside .course-primary-action,.course-overview__aside .course-secondary-action { width: 100%; min-height: 3rem; border-color: #fff; background: #fff; color: #0864bc; font-size: .86rem; }
.course-overview__aside .course-primary-action:hover,.course-overview__aside .course-secondary-action:hover { background: #e9f4ff; color: #064c92; }
.course-overview__aside .course-sidebar-card__notice { color: #173458; }
.course-overview__aside .course-sidebar-card__heading,.course-overview__aside .course-sidebar-facts,.course-overview__aside .course-sidebar-links,.course-overview__aside .course-creator-card { display: none; }
.course-overview__body { max-width: 78.25rem; overflow: hidden; margin: 0 auto; border: 1px solid var(--course-border); border-radius: 1rem; background: #fff; }
.course-overview__tabs { display: flex; min-height: 4.7rem; align-items: stretch; gap: 2rem; overflow-x: auto; border-bottom: 1px solid var(--course-border); padding: 0 2.2rem; }
.course-overview__tab { display: inline-flex; min-height: 4.7rem; flex: 0 0 auto; align-items: center; gap: .45rem; border: 0; border-bottom: 3px solid transparent; background: transparent; padding: .15rem 0 0; color: #617792; font-size: .93rem; font-weight: 650; cursor: pointer; }
.course-overview__tab:hover,.course-overview__tab[aria-selected="true"] { color: #0869ca; }
.course-overview__tab[aria-selected="true"] { border-bottom-color: #0869ca; }
.course-overview__tab:focus-visible { outline: 3px solid #77b8f6; outline-offset: -5px; }
.course-overview__tab span { border-radius: .35rem; background: #edf3fa; padding: .1rem .35rem; color: #516b89; font-size: .7rem; }
.course-overview__layout { display: block; width: 100%; margin: 0; padding: clamp(1.4rem,3vw,2.2rem); }
.course-overview__layout > [hidden] { display: none !important; }
.course-overview__about { display: grid; gap: 2rem; max-width: none; padding: 0; }
.course-overview__section-kicker { margin-bottom: .7rem; color: #0869ca; font-size: .75rem; font-weight: 800; }
.course-overview__about h2,.course-overview__section-heading h2 { color: #203550; font-size: clamp(1.35rem,2vw,1.65rem); font-weight: 800; }
.course-overview__copy { max-width: 68rem; color: #5f7792; font-size: .98rem; line-height: 1.7; }
.course-overview__subsection h3 { margin-bottom: .9rem; color: #203550; font-size: 1.35rem; font-weight: 780; }
.course-overview__list { grid-template-columns: repeat(2,minmax(0,1fr)); gap: .9rem 2rem; padding-left: 0; color: #3c5876; font-size: .92rem; list-style: none; }
.course-overview__list li { position: relative; padding-left: 1.5rem; }
.course-overview__list li::before { content: "✓"; position: absolute; left: 0; color: #108c6a; font-weight: 800; }
.course-overview__author { margin-top: .3rem; }
.course-overview__author-card { display: flex; min-height: 7rem; align-items: center; gap: 1rem; margin-top: 1.15rem; border: 1px solid var(--course-border); border-radius: .7rem; padding: 1rem 1.4rem; }
.course-overview__author-card .course-creator-card__avatar { width: 3.7rem; height: 3.7rem; border: 0; background: #e9f2ff; color: #0869ca; font-size: 1.3rem; font-weight: 800; }
.course-overview__author-card a { color: #203550; font-weight: 750; }
.course-overview__author-card a:hover { color: #0869ca; }
.course-overview__more { display: flex; flex-wrap: wrap; align-items: baseline; gap: 1rem 2rem; margin-top: .2rem; border-top: 1px solid var(--course-border); padding-top: 1.5rem; }
.course-overview__more h2 { flex: 0 0 100%; }
.course-overview__more a { color: #0869ca; font-size: .93rem; }
.course-overview__curriculum,.course-overview__reviews { min-width: 0; }
.course-overview__curriculum .course-overview__section-heading { margin-bottom: 1.25rem; }
.course-overview__curriculum .course-curriculum { border-radius: .7rem; }
.course-overview__curriculum .course-module__summary { min-height: 4rem; padding: .85rem 1.15rem; }
.course-overview__curriculum .course-lesson { min-height: 2.75rem; font-size: .88rem; }
.course-overview__reviews .course-rating-row { border-top: 0; padding-top: 0; }
.course-overview__reviews .course-review { border: 1px solid var(--course-border); border-radius: .7rem; padding: 1rem 1.2rem; }

@media (max-width: 950px) {
    .course-overview__hero { grid-template-columns: minmax(8rem,12rem) minmax(0,1fr); }
    .course-overview__hero > .course-overview__aside { grid-column: 1 / -1; }
    .course-overview__aside .course-sidebar-card { display: grid; grid-template-columns: 1fr minmax(12rem,20rem); align-items: center; gap: .1rem 1rem; }
    .course-overview__aside .course-sidebar-card__actions { grid-column: 2; grid-row: 1 / 4; margin-top: 0; }
}
@media (max-width: 640px) {
    .course-overview { padding: 0 .8rem 2rem; }
    .course-overview__crumbs { min-height: 3.5rem; padding: .8rem .15rem; font-size: .78rem; }
    .course-overview__hero { grid-template-columns: minmax(0,1fr); gap: 1.25rem; min-height: 0; margin-bottom: 1.25rem; padding: 1.25rem; }
    .course-overview__hero > .course-overview__cover,.course-overview__hero > .course-overview__intro,.course-overview__hero > .course-overview__aside { grid-column: 1; }
    .course-overview__cover { width: 100%; min-height: 9.5rem; aspect-ratio: 2; padding: 1rem; }
    .course-overview__cover-brand { font-size: .56rem; }
    .course-overview__cover-logo { width: 2.8rem; height: 2.8rem; margin-bottom: .3rem; }
    .course-overview__cover strong { font-size: 1.1rem; }
    .course-overview__title { max-width: none; font-size: clamp(1.65rem,7vw,2.15rem); }
    .course-overview__lead { font-size: .88rem; }
    .course-overview__facts { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
    .course-overview__facts > div:nth-child(2) { border-right: 0; }
    .course-overview__aside { border-top: 1px solid rgba(255,255,255,.2); padding-top: 1.2rem; }
    .course-overview__aside .course-sidebar-card { display: block; }
    .course-overview__aside .course-sidebar-card__actions { margin-top: 1rem; }
    .course-overview__aside .course-sidebar-card__price { font-size: 1.55rem; }
    .course-overview__tabs { gap: 1.3rem; min-height: 3.8rem; padding: 0 1rem; }
    .course-overview__tab { min-height: 3.8rem; font-size: .85rem; }
    .course-overview__layout { padding: 1.25rem 1rem; }
    .course-overview__list { grid-template-columns: minmax(0,1fr); }
    .course-overview__section-heading { flex-wrap: wrap; }
    .course-overview__section-heading p { text-align: left; }
}