.ainpa-course-detail {
    --ainpa-course-bg: #fbf7f6;
    --ainpa-course-surface: #ffffff;
    --ainpa-course-surface-soft: #fff6f4;
    --ainpa-course-border: #ead9d5;
    --ainpa-course-border-soft: #f3e8e5;
    --ainpa-course-text: #10213a;
    --ainpa-course-muted: #59677c;
    --ainpa-course-muted-2: #7d8797;
    --ainpa-course-primary: #9a0000;
    --ainpa-course-primary-strong: #760000;
    --ainpa-course-purple: #7d1722;
    --ainpa-course-purple-strong: #5f0f16;
    --ainpa-course-green: #14a05d;
    --ainpa-course-green-soft: #e8f8ef;
    --ainpa-course-blue-soft: #fff0ee;
    --ainpa-course-orange: #cb6d12;
    --ainpa-course-radius: 8px;
    --ainpa-course-shadow: 0 18px 44px rgba(92, 18, 18, .09);
    --ainpa-course-font: Inter, Figtree, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.ainpa-course-detail {
    background: var(--ainpa-course-bg);
    color: var(--ainpa-course-text);
    direction: ltr;
    font-family: var(--ainpa-course-font);
    min-height: 100vh;
    padding: 24px clamp(16px, 3.4vw, 40px) 42px;
}

.ainpa-course-detail *,
.ainpa-course-detail *::before,
.ainpa-course-detail *::after {
    box-sizing: border-box;
}

.ainpa-course-shell {
    margin: 0 auto;
    max-width: 1180px;
}

.ainpa-course-breadcrumb {
    align-items: center;
    color: var(--ainpa-course-muted);
    display: flex;
    flex-wrap: wrap;
    font-size: 13px;
    gap: 10px;
    margin-bottom: 24px;
}

.ainpa-course-breadcrumb a {
    color: var(--ainpa-course-primary);
    font-weight: 700;
    text-decoration: none;
}

.ainpa-course-breadcrumb strong {
    color: var(--ainpa-course-text);
    font-weight: 700;
}

.ainpa-course-alert {
    border-radius: 8px;
    font-weight: 760;
    line-height: 1.5;
    margin-bottom: 18px;
    padding: 14px 16px;
}

.ainpa-course-alert.is-error {
    background: #fee2e2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.ainpa-course-alert.is-success {
    background: #e9f8ef;
    border: 1px solid #bde8cc;
    color: #146c45;
}

.ainpa-course-hero {
    display: grid;
    gap: 30px;
    grid-template-columns: minmax(0, 1fr) 330px;
    margin-bottom: 26px;
}

.ainpa-course-intro h1 {
    color: var(--ainpa-course-text);
    font-size: clamp(32px, 4.2vw, 46px);
    font-weight: 860;
    letter-spacing: 0;
    line-height: 1.08;
    margin: 16px 0 14px;
}

.ainpa-course-intro > p {
    color: var(--ainpa-course-muted);
    font-size: 17px;
    line-height: 1.75;
    margin: 0;
    max-width: 690px;
}

.ainpa-course-pill {
    background: linear-gradient(135deg, var(--ainpa-course-primary), var(--ainpa-course-purple));
    border-radius: 999px;
    color: #fff;
    display: inline-flex;
    font-size: 13px;
    font-weight: 800;
    min-height: 31px;
    padding: 8px 17px;
}

.ainpa-course-instructor-row {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 24px;
}

.ainpa-course-avatar {
    align-items: center;
    background: #111827;
    border-radius: 999px;
    color: #fff;
    display: inline-flex;
    flex: 0 0 44px;
    font-size: 17px;
    font-weight: 850;
    height: 44px;
    justify-content: center;
    width: 44px;
}

.ainpa-course-avatar.is-large {
    flex-basis: 70px;
    font-size: 24px;
    height: 70px;
    width: 70px;
}

.ainpa-course-instructor-row strong,
.ainpa-course-instructor-mini strong {
    display: block;
    font-size: 15px;
    font-weight: 830;
}

.ainpa-course-instructor-row small,
.ainpa-course-instructor-mini small {
    color: var(--ainpa-course-muted);
    display: block;
    font-size: 13px;
    margin-top: 3px;
}

.ainpa-course-rating {
    align-items: center;
    display: flex;
    gap: 8px;
    margin-left: 18px;
}

.ainpa-course-rating span {
    color: var(--ainpa-course-orange);
    font-size: 15px;
    letter-spacing: 1px;
}

.ainpa-course-rating small {
    margin: 0;
}

.ainpa-course-meta-strip {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: 34px;
}

.ainpa-course-meta-strip div {
    display: grid;
    gap: 7px;
}

.ainpa-course-meta-strip span {
    color: var(--ainpa-course-muted);
    font-size: 13px;
}

.ainpa-course-meta-strip strong {
    color: var(--ainpa-course-text);
    font-size: 14px;
}

.ainpa-course-preview-card {
    appearance: none;
    background: #071327;
    border: 0;
    border-radius: var(--ainpa-course-radius);
    box-shadow: var(--ainpa-course-shadow);
    color: #fff;
    cursor: pointer;
    min-height: 240px;
    overflow: hidden;
    padding: 0;
    position: relative;
    text-align: center;
    text-decoration: none;
}

.ainpa-course-preview-card::after {
    background: linear-gradient(180deg, rgba(7, 19, 39, .05), rgba(7, 19, 39, .72));
    content: "";
    inset: 0;
    position: absolute;
}

.ainpa-course-preview-card.is-static {
    cursor: default;
}

.ainpa-course-preview-card.is-static::after {
    background: transparent;
}

.ainpa-course-preview-card img,
.ainpa-course-preview-fallback {
    display: block;
    height: 100%;
    min-height: 240px;
    object-fit: cover;
    width: 100%;
}

.ainpa-course-preview-fallback {
    align-items: center;
    background: linear-gradient(135deg, #5f0f16, #9a0000);
    color: #fff1ef;
    display: flex;
    font-size: 42px;
    font-weight: 900;
    justify-content: center;
}

.ainpa-course-play {
    align-items: center;
    background: rgba(255, 255, 255, .92);
    border-radius: 999px;
    display: inline-flex;
    height: 64px;
    justify-content: center;
    left: 50%;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    z-index: 2;
}

.ainpa-course-play span {
    border-bottom: 13px solid transparent;
    border-left: 18px solid var(--ainpa-course-primary);
    border-top: 13px solid transparent;
    display: block;
    height: 0;
    margin-left: 5px;
    width: 0;
}

.ainpa-course-preview-card strong {
    bottom: 24px;
    left: 50%;
    position: absolute;
    transform: translateX(-50%);
    z-index: 2;
}

.ainpa-course-layout {
    align-items: start;
    display: grid;
    gap: 28px;
    grid-template-columns: minmax(0, 1fr) 300px;
}

.ainpa-course-main,
.ainpa-course-sidebar {
    min-width: 0;
}

.ainpa-course-tabs,
.ainpa-course-info-card,
.ainpa-course-price-card,
.ainpa-course-side-card,
.ainpa-course-sections,
.ainpa-course-curriculum-head {
    background: var(--ainpa-course-surface);
    border: 1px solid var(--ainpa-course-border);
    border-radius: var(--ainpa-course-radius);
    box-shadow: 0 10px 25px rgba(15, 35, 75, .045);
}

.ainpa-course-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    overflow-x: auto;
    padding: 0 14px;
}

.ainpa-course-tabs button {
    background: transparent;
    border: 0;
    color: var(--ainpa-course-muted);
    cursor: pointer;
    font: inherit;
    font-size: 14px;
    font-weight: 760;
    min-height: 58px;
    padding: 0 10px;
    position: relative;
    white-space: nowrap;
}

.ainpa-course-tabs button::after {
    background: var(--ainpa-course-primary);
    border-radius: 999px;
    bottom: 0;
    content: "";
    height: 3px;
    left: 10px;
    opacity: 0;
    position: absolute;
    right: 10px;
}

.ainpa-course-tabs button.is-active {
    color: var(--ainpa-course-primary);
}

.ainpa-course-tabs button.is-active::after {
    opacity: 1;
}

.ainpa-course-tab-panel {
    display: none;
}

.ainpa-course-tab-panel.is-active {
    display: block;
}

.ainpa-course-card-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ainpa-course-info-card {
    padding: 23px;
}

.ainpa-course-info-card h2,
.ainpa-course-side-card h2,
.ainpa-course-curriculum-head h2 {
    font-size: 18px;
    font-weight: 850;
    letter-spacing: 0;
    margin: 0 0 16px;
}

.ainpa-course-info-card p,
.ainpa-course-info-card li,
.ainpa-course-side-card p,
.ainpa-course-side-card li {
    color: var(--ainpa-course-muted);
    font-size: 14px;
    line-height: 1.75;
}

.ainpa-course-info-card ul,
.ainpa-course-side-card ul {
    display: grid;
    gap: 10px;
    margin: 0;
    padding-left: 18px;
}

.ainpa-course-check-list {
    list-style: none;
    padding-left: 0 !important;
}

.ainpa-course-check-list li {
    padding-left: 24px;
    position: relative;
}

.ainpa-course-check-list li::before {
    color: var(--ainpa-course-green);
    content: "✓";
    font-weight: 900;
    left: 0;
    position: absolute;
}

.ainpa-course-curriculum-head {
    align-items: center;
    display: flex;
    gap: 14px;
    justify-content: space-between;
    margin-bottom: 12px;
    padding: 18px 20px;
}

.ainpa-course-curriculum-head h2 {
    margin: 0;
}

.ainpa-course-curriculum-head span {
    color: var(--ainpa-course-muted);
    font-size: 13px;
    margin-left: auto;
}

.ainpa-course-curriculum-head button,
.ainpa-course-side-card button {
    background: #fff;
    border: 1px solid #eab6ae;
    border-radius: 6px;
    color: var(--ainpa-course-primary);
    cursor: pointer;
    font: inherit;
    font-size: 13px;
    font-weight: 800;
    min-height: 38px;
    padding: 0 16px;
}

.ainpa-course-sections {
    overflow: hidden;
}

.ainpa-course-section + .ainpa-course-section {
    border-top: 1px solid var(--ainpa-course-border-soft);
}

.ainpa-course-section-head {
    align-items: center;
    background: #fff;
    border: 0;
    color: var(--ainpa-course-text);
    cursor: pointer;
    display: flex;
    font: inherit;
    justify-content: space-between;
    min-height: 58px;
    padding: 0 20px;
    text-align: left;
    width: 100%;
}

.ainpa-course-section-head span {
    font-weight: 820;
}

.ainpa-course-section-head strong {
    color: var(--ainpa-course-muted);
    font-size: 13px;
}

.ainpa-course-lessons {
    border-top: 1px solid var(--ainpa-course-border-soft);
    display: none;
}

.ainpa-course-section.is-open .ainpa-course-lessons {
    display: block;
}

.ainpa-course-lesson-row {
    align-items: center;
    background: #fff;
    border-bottom: 1px solid var(--ainpa-course-border-soft);
    display: flex;
    min-height: 45px;
}

.ainpa-course-lesson {
    align-items: center;
    background: transparent;
    border: 0;
    color: var(--ainpa-course-text);
    cursor: pointer;
    display: grid;
    flex: 1;
    font: inherit;
    gap: 12px;
    grid-template-columns: 40px minmax(0, 1fr) auto auto auto;
    min-height: 45px;
    padding: 0 20px;
    text-align: left;
    text-decoration: none;
    width: auto;
}

.ainpa-course-lesson:hover,
.ainpa-course-lesson-row:focus-within .ainpa-course-lesson {
    background: var(--ainpa-course-surface-soft);
}

.ainpa-course-lesson.is-locked {
    color: var(--ainpa-course-muted);
    cursor: not-allowed;
    opacity: .65;
}

.ainpa-course-lesson.is-locked:hover {
    background: transparent;
}

.ainpa-course-lesson-preview {
    align-items: center;
    border-radius: 7px;
    color: var(--ainpa-course-primary);
    display: inline-flex;
    flex: 0 0 34px;
    height: 34px;
    justify-content: center;
    margin-right: 14px;
    position: relative;
    transition: background .18s ease, color .18s ease;
    width: 34px;
}

.ainpa-course-lesson-preview svg {
    fill: none;
    height: 19px;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
    width: 19px;
}

.ainpa-course-lesson-preview:not(.is-disabled):hover,
.ainpa-course-lesson-preview:not(.is-disabled):focus-visible {
    background: var(--ainpa-course-blue-soft);
    color: var(--ainpa-course-primary-strong);
    outline: 0;
}

.ainpa-course-lesson-preview.is-disabled {
    color: #c7cbd4;
    cursor: not-allowed;
}

.ainpa-course-lesson-preview.is-disabled::after {
    background: #172033;
    border-radius: 6px;
    bottom: calc(100% + 8px);
    color: #fff;
    content: attr(data-tooltip);
    font-size: 12px;
    font-weight: 700;
    left: 50%;
    opacity: 0;
    padding: 7px 9px;
    pointer-events: none;
    position: absolute;
    transform: translate(-50%, 4px);
    transition: opacity .16s ease, transform .16s ease;
    visibility: hidden;
    white-space: nowrap;
    z-index: 4;
}

.ainpa-course-lesson-preview.is-disabled:hover::after,
.ainpa-course-lesson-preview.is-disabled:focus-visible::after {
    opacity: 1;
    transform: translate(-50%, 0);
    visibility: visible;
}

.ainpa-course-lesson span,
.ainpa-course-lesson small,
.ainpa-course-lesson b {
    color: var(--ainpa-course-muted);
    font-size: 13px;
    font-weight: 650;
}

.ainpa-course-lesson strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ainpa-course-lesson em {
    background: var(--ainpa-course-blue-soft);
    border-radius: 5px;
    color: var(--ainpa-course-primary);
    font-size: 12px;
    font-style: normal;
    font-weight: 800;
    padding: 5px 9px;
}

.ainpa-course-price-card,
.ainpa-course-side-card {
    padding: 20px;
}

.ainpa-course-sidebar {
    display: grid;
    gap: 22px;
    position: sticky;
    top: 18px;
}

.ainpa-course-price-line {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 18px;
}

.ainpa-course-price-line strong {
    font-size: 34px;
    font-weight: 900;
}

.ainpa-course-price-line span {
    color: var(--ainpa-course-muted);
    font-weight: 800;
}

.ainpa-course-price-line del {
    color: var(--ainpa-course-muted-2);
    font-weight: 700;
}

.ainpa-course-price-line em {
    background: #dcfce7;
    border-radius: 999px;
    color: #12834d;
    font-size: 12px;
    font-style: normal;
    font-weight: 850;
    padding: 7px 11px;
}

.ainpa-course-status {
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 6px;
    color: #9a3412;
    font-size: 13px;
    font-weight: 780;
    margin-bottom: 14px;
    padding: 13px 14px;
}

.ainpa-course-status.is-enrolled {
    background: var(--ainpa-course-green-soft);
    border-color: #c8efd9;
    color: #146c45;
}

.ainpa-course-primary,
.ainpa-course-secondary {
    align-items: center;
    border-radius: 7px;
    cursor: pointer;
    display: inline-flex;
    font: inherit;
    font-weight: 850;
    justify-content: center;
    min-height: 48px;
    text-decoration: none;
    width: 100%;
}

.ainpa-course-primary {
    background: linear-gradient(135deg, var(--ainpa-course-primary), var(--ainpa-course-purple));
    border: 0;
    color: #fff;
    box-shadow: 0 12px 28px rgba(154, 0, 0, .22);
}

.ainpa-course-primary:disabled {
    cursor: wait;
    opacity: .68;
}

.ainpa-course-secondary {
    background: #fff;
    border: 1px solid var(--ainpa-course-border);
    color: var(--ainpa-course-text);
}

.ainpa-course-player-link {
    margin-top: 10px;
}

.ainpa-course-benefits {
    border-top: 1px solid var(--ainpa-course-border-soft);
    display: grid;
    gap: 13px;
    list-style: none;
    margin: 18px 0 0;
    padding: 18px 0 0;
}

.ainpa-course-benefits li {
    color: var(--ainpa-course-text);
    font-size: 14px;
    padding-left: 25px;
    position: relative;
}

.ainpa-course-benefits li::before {
    background: #fde8e5;
    border-radius: 999px;
    content: "";
    height: 10px;
    left: 2px;
    position: absolute;
    top: 5px;
    width: 10px;
}

.ainpa-course-instructor-mini,
.ainpa-course-instructor-block {
    align-items: center;
    display: flex;
    gap: 14px;
}

.ainpa-course-instructor-profile-link {
    align-items: center;
    border: 1px solid #e7bbb5;
    border-radius: 7px;
    color: var(--ainpa-course-primary);
    display: inline-flex;
    font-size: 13px;
    font-weight: 850;
    gap: 8px;
    margin-top: 18px;
    min-height: 40px;
    padding: 0 12px;
    text-decoration: none;
}

.ainpa-course-instructor-profile-link:hover,
.ainpa-course-instructor-profile-link:focus-visible {
    background: #fff0ee;
    border-color: var(--ainpa-course-primary);
    color: var(--ainpa-course-primary-strong);
    outline: none;
}

.ainpa-course-instructor-profile-link svg {
    fill: none;
    height: 17px;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
    width: 17px;
}

.ainpa-course-instructor-profile-link .ainpa-course-instructor-profile-link__arrow {
    height: 15px;
    margin-left: 2px;
    width: 15px;
}

.ainpa-course-side-card details,
.ainpa-course-faq {
    border-top: 1px solid var(--ainpa-course-border-soft);
    padding: 14px 0;
}

.ainpa-course-side-card summary,
.ainpa-course-faq summary {
    cursor: pointer;
    font-weight: 800;
}

.ainpa-course-faq-list {
    background: var(--ainpa-course-surface);
    border: 1px solid var(--ainpa-course-border);
    border-radius: var(--ainpa-course-radius);
    padding: 6px 20px;
}

.ainpa-course-certificate {
    background: linear-gradient(135deg, #fff7ed, #fef3c7);
    border: 1px solid #fed7aa;
    border-radius: var(--ainpa-course-radius);
    color: #9a3412;
    font-weight: 880;
    margin-top: 18px;
    max-width: 260px;
    padding: 28px;
    text-align: center;
}

.ainpa-course-empty {
    color: var(--ainpa-course-muted);
    padding: 24px;
}

.ainpa-course-modal {
    display: none;
    inset: 0;
    position: fixed;
    z-index: 10000;
}

.ainpa-course-modal.is-open {
    display: block;
}

.ainpa-course-modal-backdrop {
    background: rgba(15, 23, 42, .72);
    inset: 0;
    position: absolute;
}

.ainpa-course-enroll-dialog,
.ainpa-course-preview-dialog {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 28px 90px rgba(0, 0, 0, .35);
    left: 50%;
    max-height: calc(100vh - 44px);
    overflow: auto;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
}

.ainpa-course-enroll-dialog {
    max-width: 630px;
    padding: 28px;
    width: calc(100vw - 34px);
}

.ainpa-course-preview-dialog {
    display: grid;
    gap: 24px;
    grid-template-columns: minmax(0, 1.25fr) minmax(290px, .75fr);
    max-width: 900px;
    padding: 22px;
    width: calc(100vw - 36px);
}

.ainpa-course-modal-close {
    background: transparent;
    border: 0;
    color: #1f2a44;
    cursor: pointer;
    font-size: 32px;
    line-height: 1;
    position: absolute;
    right: 20px;
    top: 18px;
    z-index: 2;
}

.ainpa-course-enroll-grid {
    display: grid;
    gap: 30px;
    grid-template-columns: 190px minmax(0, 1fr);
}

.ainpa-course-enroll-preview img,
.ainpa-course-enroll-preview > span {
    border-radius: 8px;
    display: block;
    height: 190px;
    object-fit: cover;
    width: 100%;
}

.ainpa-course-enroll-preview > span {
    align-items: center;
    background: linear-gradient(135deg, #760000, #b9161c);
    color: #fff;
    display: flex;
    font-size: 34px;
    font-weight: 900;
    justify-content: center;
}

.ainpa-course-enroll-preview h3 {
    font-size: 15px;
    line-height: 1.3;
    margin: 14px 0 7px;
}

.ainpa-course-enroll-preview p {
    color: var(--ainpa-course-muted);
    font-size: 13px;
    margin: 0;
}

.ainpa-course-enroll-form {
    display: grid;
    gap: 14px;
    padding-top: 30px;
    text-align: center;
}

.ainpa-course-ticket {
    align-items: center;
    align-self: center;
    background: var(--ainpa-course-purple);
    border-radius: 7px;
    color: #fff;
    display: inline-flex;
    font-size: 12px;
    font-weight: 850;
    justify-self: center;
    min-height: 31px;
    padding: 0 12px;
}

.ainpa-course-enroll-form h2 {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 0;
    margin: 0;
}

.ainpa-course-enroll-form p {
    color: var(--ainpa-course-muted);
    line-height: 1.6;
    margin: 0;
}

.ainpa-course-account-option {
    align-items: center;
    border-top: 1px solid var(--ainpa-course-border);
    color: var(--ainpa-course-muted);
    display: flex;
    flex-wrap: wrap;
    font-size: 14px;
    gap: 8px;
    justify-content: center;
    margin-top: 2px;
    padding-top: 16px;
}

.ainpa-course-account-option a {
    color: var(--ainpa-course-primary);
    font-weight: 800;
    text-decoration: none;
}

.ainpa-course-account-option a:hover,
.ainpa-course-account-option a:focus {
    color: var(--ainpa-course-primary-strong);
    text-decoration: underline;
}

.ainpa-course-enroll-form label {
    display: grid;
    gap: 8px;
    text-align: left;
}

.ainpa-course-enroll-form label span {
    font-size: 13px;
    font-weight: 800;
}

.ainpa-course-enroll-form input {
    border: 1px solid var(--ainpa-course-border);
    border-radius: 7px;
    font: inherit;
    min-height: 48px;
    outline: 0;
    padding: 0 15px;
}

.ainpa-course-enroll-form input:focus {
    border-color: var(--ainpa-course-primary);
    box-shadow: 0 0 0 3px rgba(154, 0, 0, .14);
}

.ainpa-course-divider {
    align-items: center;
    color: var(--ainpa-course-muted-2);
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr auto 1fr;
}

.ainpa-course-divider::before,
.ainpa-course-divider::after {
    background: var(--ainpa-course-border);
    content: "";
    height: 1px;
}

.ainpa-course-modal-note {
    background: #fff0ee;
    border-radius: 7px;
    color: var(--ainpa-course-purple);
    font-weight: 760;
    line-height: 1.5;
    margin: 22px 0 0;
    padding: 15px 18px;
    text-align: center;
}

.ainpa-course-coupon-message {
    border-radius: 6px;
    display: none;
    font-size: 13px;
    font-weight: 750;
    line-height: 1.45;
    padding: 11px 13px;
}

.ainpa-course-coupon-message.is-success {
    background: var(--ainpa-course-green-soft);
    color: #146c45;
    display: block;
}

.ainpa-course-coupon-message.is-error {
    background: #fee2e2;
    color: #991b1b;
    display: block;
}

.ainpa-course-video-frame {
    align-items: center;
    background: #071327;
    border-radius: 8px;
    display: flex;
    min-height: 330px;
    overflow: hidden;
    position: relative;
}

.ainpa-course-video-frame img,
.ainpa-course-video-frame iframe,
.ainpa-course-video-frame video {
    border: 0;
    display: block;
    height: 100%;
    min-height: 330px;
    object-fit: cover;
    width: 100%;
}

.ainpa-course-video-frame > span {
    color: #dceaff;
    font-size: 42px;
    font-weight: 900;
    margin: auto;
}

.ainpa-course-preview-copy h2 {
    font-size: 24px;
    font-weight: 900;
    letter-spacing: 0;
    margin: 28px 0 10px;
}

.ainpa-course-preview-meta {
    color: var(--ainpa-course-muted);
    display: flex;
    gap: 16px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 16px;
}

.ainpa-course-preview-copy p {
    color: var(--ainpa-course-muted);
    line-height: 1.7;
}

.ainpa-course-preview-lock {
    background: var(--ainpa-course-surface-soft);
    border: 1px solid var(--ainpa-course-border-soft);
    border-radius: 8px;
    display: grid;
    gap: 16px;
    margin-top: 24px;
    padding: 20px;
}

.ainpa-course-preview-lock strong {
    color: var(--ainpa-course-muted);
    font-size: 14px;
    line-height: 1.6;
}

.ainpa-course-detail :is(a, button, input, select, summary, [tabindex]):focus-visible {
    outline: 3px solid rgba(154, 0, 0, .28);
    outline-offset: 3px;
}

body:has(.ainpa-course-detail) .art-theme-footer {
    margin-inline: 0;
    width: 100%;
}

@media (max-width: 900px) {
    html:has(.ainpa-course-detail),
    body:has(.ainpa-course-detail) {
        max-width: 100%;
        overflow-x: hidden;
    }

    body:has(.ainpa-course-detail) .art-header-menu-row {
        max-width: 100vw;
        min-width: 0;
    }

    body:has(.ainpa-course-detail) .art-header-latest-wrap,
    body:has(.ainpa-course-detail) .art-header-latest-menu {
        max-width: 100%;
        min-width: 0;
        position: static !important;
    }

    body:has(.ainpa-course-detail) .art-header-mega {
        inset-inline: 14px !important;
        max-width: none !important;
        top: calc(100% + 8px) !important;
        width: auto !important;
    }
}

@media (max-width: 980px) {
    .ainpa-course-hero,
    .ainpa-course-layout,
    .ainpa-course-preview-dialog {
        grid-template-columns: 1fr;
    }

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

    .ainpa-course-meta-strip {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .ainpa-course-detail {
        padding: 18px 12px 32px;
    }

    .ainpa-course-breadcrumb {
        gap: 7px;
        margin-bottom: 18px;
    }

    .ainpa-course-breadcrumb strong {
        overflow-wrap: anywhere;
    }

    .ainpa-course-intro h1 {
        font-size: clamp(28px, 9vw, 36px);
        margin: 14px 0 10px;
        overflow-wrap: anywhere;
    }

    .ainpa-course-intro > p {
        font-size: 15px;
        line-height: 1.65;
    }

    .ainpa-course-instructor-row {
        gap: 12px;
        margin-top: 20px;
    }

    .ainpa-course-rating {
        margin-left: 0;
        width: 100%;
    }

    .ainpa-course-meta-strip {
        gap: 16px 12px;
        margin-top: 24px;
    }

    .ainpa-course-hero,
    .ainpa-course-layout {
        gap: 18px;
    }

    .ainpa-course-preview-card,
    .ainpa-course-preview-card img,
    .ainpa-course-preview-fallback {
        min-height: 0;
    }

    .ainpa-course-preview-card {
        aspect-ratio: 16 / 10;
    }

    .ainpa-course-info-card {
        padding: 18px;
    }

    .ainpa-course-card-grid,
    .ainpa-course-enroll-grid {
        grid-template-columns: 1fr;
    }

    .ainpa-course-lesson {
        grid-template-columns: 34px minmax(0, 1fr);
        padding-bottom: 12px;
        padding-top: 12px;
    }

    .ainpa-course-lesson small,
    .ainpa-course-lesson b,
    .ainpa-course-lesson em {
        grid-column: 2;
        justify-self: start;
    }

    .ainpa-course-meta-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .ainpa-course-curriculum-head {
        align-items: flex-start;
        flex-direction: column;
    }

    .ainpa-course-curriculum-head span {
        margin-left: 0;
    }
}