.course-overview-hero {
    padding: clamp(7rem, 10vw, 10rem) 0 clamp(4rem, 7vw, 6rem);
    border-bottom: 1px solid var(--color-line);
    background: radial-gradient(circle at 50% 0%, var(--color-accent-soft), transparent 30%), var(--color-bg);
    text-align: center;
}

.course-overview-hero__inner {
    display: grid;
    justify-items: center;
    gap: clamp(2rem, 5vw, 4rem);
}

.course-overview-hero__content {
    width: min(940px, 100%);
    margin-inline: auto;
}

.course-overview-hero h1 {
    max-width: 940px;
    margin-inline: auto;
    margin-bottom: 1.2rem;
}

.course-overview-hero .hero__lead {
    max-width: 760px;
    margin-inline: auto;
}

.course-overview-hero .eyebrow {
    justify-content: center;
}

.course-overview-hero__image {
    width: min(760px, 100%);
    margin: 0;
    border: 1px solid var(--color-line);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.course-overview-hero__image img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.course-detail-hero {
    padding: clamp(7rem, 10vw, 10rem) 0 clamp(3rem, 6vw, 5rem);
    border-bottom: 1px solid var(--color-line);
    background: radial-gradient(circle at 85% 10%, var(--color-accent-soft), transparent 28%), var(--color-bg);
}

.course-detail-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(300px, 0.8fr);
    gap: clamp(2rem, 6vw, 5rem);
    align-items: center;
}

.course-detail-hero h1 {
    max-width: 900px;
    margin-bottom: 1.2rem;
}

.course-detail-hero__image {
    margin: 0;
    border: 1px solid var(--color-line);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.course-detail-hero__image img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.course-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.4rem;
}

.course-meta-row span,
.course-rating-line {
    color: var(--color-accent);
    font-size: 0.78rem;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.course-hero-actions {
    margin-top: 1.6rem;
}

.course-hero-actions .button {
    min-height: 48px;
    padding-inline: 1.35rem;
}

.course-detail-section {
    padding: clamp(3.5rem, 7vw, 6rem) 0;
}

.course-detail-section + .course-detail-section {
    border-top: 1px solid var(--color-line);
}

.course-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.1rem;
}

.course-detail-grid--modules,
.course-detail-grid--reviews {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.course-detail-card {
    padding: clamp(1.3rem, 3vw, 2rem);
    border: 1px solid var(--color-line);
    background: linear-gradient(145deg, rgba(255,255,255,0.055), rgba(255,255,255,0.018));
    box-shadow: var(--shadow-soft);
}

.course-detail-card h2,
.course-detail-card h3 {
    margin-bottom: 0.8rem;
}

.course-detail-card p,
.course-detail-card li {
    color: rgba(242, 239, 233, 0.76);
}

.course-detail-card ul {
    margin: 1rem 0 0;
    padding-left: 1.1rem;
}

.course-booking-card {
    max-width: 760px;
    margin-inline: auto;
    text-align: center;
}

.course-review-card {
    display: grid;
    gap: 0.6rem;
}

.course-review-stars {
    margin: 0;
    color: var(--color-accent) !important;
    font-size: 1.1rem;
    letter-spacing: 0.08em;
}

.course-card .course-rating-line {
    display: block;
    margin: 0.2rem 0 0.35rem;
}

.customer-course-hero,
.customer-lesson-hero {
    background: radial-gradient(circle at 85% 10%, rgba(0,102,204,.16), transparent 26%), var(--color-bg);
}

.course-section-heading {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    align-items: end;
    margin-bottom: 1.5rem;
}

.course-section-heading p:not(.eyebrow) {
    max-width: 640px;
    color: var(--color-muted);
}

.customer-module-card {
    min-height: 100%;
}

.customer-lesson-list {
    display: grid;
    gap: 0.75rem;
    padding-left: 0 !important;
    list-style: none;
}

.customer-lesson-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.8rem 0;
    border-top: 1px solid var(--color-line);
}

.customer-lesson-list li:first-child {
    border-top: 0;
}

.customer-lesson-list li span {
    color: var(--color-accent);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    white-space: nowrap;
}

.customer-lesson-list li.is-completed .nd-link {
    color: rgba(242,239,233,.66);
}

.customer-review-card .admin-form {
    margin-top: 1.3rem;
    text-align: left;
}

.customer-review-card .admin-form input,
.customer-review-card .admin-form textarea,
.customer-review-card .admin-form select,
.course-inline-form input,
.course-inline-form textarea,
.course-inline-form select {
    width: 100%;
    min-height: 46px;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--color-line);
    border-radius: 14px;
    background: rgba(255,255,255,.06);
    color: var(--color-text);
    font: inherit;
}

.customer-review-card .admin-form textarea,
.course-inline-form textarea {
    resize: vertical;
}

.customer-review-card .admin-note {
    color: var(--color-muted);
}

.course-lesson-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    gap: 1.2rem;
    align-items: start;
}

.course-lesson-main {
    display: grid;
    gap: 1.2rem;
}

.course-lesson-sidebar {
    display: grid;
    gap: 1.2rem;
    position: sticky;
    top: calc(var(--site-header-height, 90px) + 1.2rem);
}

.course-lesson-content {
    line-height: 1.75;
}

.course-lesson-content img,
.course-detail-card figure img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 1px solid var(--color-line);
}

.course-lesson-content figure {
    margin: 1.5rem 0;
}

.course-lesson-content figcaption {
    margin-top: 0.55rem;
    color: var(--color-muted);
    font-size: 0.86rem;
}

.course-inline-form {
    display: grid;
    gap: 0.8rem;
    margin-top: 1rem;
}

.course-inline-form label {
    color: var(--color-text);
    font-size: 0.84rem;
    font-weight: 750;
}

.course-message-card {
    border-color: rgba(0,102,204,.35);
    background: linear-gradient(145deg, rgba(0,102,204,.16), rgba(255,255,255,.02));
}

.course-error-card {
    border-color: rgba(180,70,70,.45);
    background: linear-gradient(145deg, rgba(180,70,70,.16), rgba(255,255,255,.02));
}

@media (max-width: 980px) {
    .course-detail-hero__grid,
    .course-detail-grid,
    .course-detail-grid--modules,
    .course-detail-grid--reviews,
    .course-lesson-layout {
        grid-template-columns: 1fr;
    }

    .course-section-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .course-lesson-sidebar {
        position: static;
    }
}

@media (max-width: 760px) {
    .course-overview-hero,
    .course-detail-hero {
        padding-top: 6rem;
    }

    .course-detail-card {
        padding: 1.2rem;
    }

    .customer-lesson-list li {
        align-items: flex-start;
        flex-direction: column;
    }
}