:root {
    --ainpa-player-bg: #f8fafc;
    --ainpa-player-surface: #ffffff;
    --ainpa-player-soft: #f3f6fb;
    --ainpa-player-line: #e3e8f0;
    --ainpa-player-line-strong: #d3dbe8;
    --ainpa-player-text: #171b26;
    --ainpa-player-muted: #5f6b80;
    --ainpa-player-muted-2: #8c96a8;
    --ainpa-player-red: #e51f27;
    --ainpa-player-red-dark: #c9141b;
    --ainpa-player-green: #18a65f;
    --ainpa-player-shadow: 0 18px 44px rgba(15, 23, 42, .08);
    --ainpa-player-radius: 8px;
    --ainpa-player-sidebar: 340px;
    --ainpa-player-font: Inter, Figtree, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.ainpa-player-lesson.is-locked{cursor:not-allowed;opacity:.55;background:#f4f1ef;pointer-events:none}.ainpa-player-lesson.is-locked em{color:#9a0000;font-size:10px;font-style:normal}.ainpa-player-content-shell{min-height:520px;background:#fff;border:1px solid #e7ded9;border-radius:16px;margin-bottom:24px;overflow:hidden;box-shadow:0 10px 28px rgba(55,24,16,.055)}.ainpa-player-text-content{padding:38px}.ainpa-player-text-content>div{max-width:900px;margin:0 auto;color:#263246;font-size:16px;line-height:1.8}.ainpa-player-text-content h1,.ainpa-player-text-content h2,.ainpa-player-text-content h3{color:#172033;line-height:1.3}.ainpa-player-text-content img{max-width:100%;height:auto}.ainpa-player-content-empty{min-height:420px;width:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;color:#687386;text-align:center}.ainpa-player-content-empty strong{color:#172033;font-size:20px}.ainpa-player-lesson-layout:has(.ainpa-player-lesson-copy:only-child){grid-template-columns:1fr}.ainpa-player-lesson-copy p{white-space:normal}
@media(max-width:760px){.ainpa-player-content-shell{min-height:340px;border-radius:12px}.ainpa-player-text-content{padding:24px 18px}.ainpa-player-pdf-content iframe{min-height:520px}}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    background: var(--ainpa-player-bg);
    color: var(--ainpa-player-text);
    font-family: var(--ainpa-player-font);
}

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

.ainpa-player {
    background: var(--ainpa-player-bg);
    display: grid;
    grid-template-columns: var(--ainpa-player-sidebar) minmax(0, 1fr);
    min-height: 100vh;
}

.ainpa-player.is-sidebar-collapsed {
    grid-template-columns: minmax(0, 1fr);
}

.ainpa-player.is-sidebar-collapsed .ainpa-player-sidebar {
    display: none;
}

.ainpa-player-sidebar {
    background: var(--ainpa-player-surface);
    border-right: 1px solid var(--ainpa-player-line);
    display: grid;
    grid-template-rows: auto auto auto 1fr;
    min-height: 100vh;
    position: sticky;
    top: 0;
    z-index: 10;
}

.ainpa-player-brand {
    align-items: center;
    border-bottom: 1px solid var(--ainpa-player-line);
    display: flex;
    height: 82px;
    justify-content: center;
    padding: 10px 26px;
}

.ainpa-player-brand img {
    display: block;
    max-height: 68px;
    max-width: 210px;
    object-fit: contain;
}

.ainpa-player button {
    font: inherit;
}

.ainpa-player-top-left button {
    align-items: center;
    background: transparent;
    border: 0;
    cursor: pointer;
    display: inline-flex;
    height: 40px;
    justify-content: center;
    padding: 0;
    width: 40px;
}

.ainpa-player-top-left button svg,
.ainpa-player-icon-btn svg,
.ainpa-player-play svg,
.ainpa-player-controls button svg {
    display: block;
    height: 21px;
    pointer-events: none;
    width: 21px;
}

.ainpa-player-top-left button svg path,
.ainpa-player-icon-btn svg path,
.ainpa-player-play svg path,
.ainpa-player-controls button svg path {
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 2;
}

.ainpa-player-play svg path,
.ainpa-player-controls [data-video-play-small] svg path {
    fill: currentColor;
    stroke: none;
}

.ainpa-player-course-summary {
    border-bottom: 1px solid var(--ainpa-player-line);
    padding: 22px;
}

.ainpa-player-back {
    color: var(--ainpa-player-muted);
    display: inline-flex;
    font-size: 14px;
    font-weight: 650;
    margin-bottom: 18px;
    text-decoration: none;
}

.ainpa-player-course-card {
    display: grid;
    gap: 14px;
    grid-template-columns: 96px minmax(0, 1fr);
}

.ainpa-player-course-card img,
.ainpa-player-course-card > span {
    border-radius: var(--ainpa-player-radius);
    display: block;
    height: 86px;
    object-fit: cover;
    width: 96px;
}

.ainpa-player-course-card > span {
    align-items: center;
    background: #111827;
    color: #fff;
    display: flex;
    font-size: 24px;
    font-weight: 900;
    justify-content: center;
}

.ainpa-player-course-card h1 {
    font-size: 16px;
    font-weight: 850;
    letter-spacing: 0;
    line-height: 1.3;
    margin: 5px 0 4px;
}

.ainpa-player-course-card p {
    color: var(--ainpa-player-muted);
    font-size: 13px;
    line-height: 1.35;
    margin: 0 0 9px;
}

.ainpa-player-course-card strong {
    color: var(--ainpa-player-red);
    display: block;
    font-size: 13px;
    margin-bottom: 8px;
}

.ainpa-player-progress-mini,
.ainpa-player-progress-top div {
    background: #e5e7eb;
    border-radius: 999px;
    height: 5px;
    overflow: hidden;
}

.ainpa-player-progress-mini span,
.ainpa-player-progress-top i {
    background: var(--ainpa-player-red);
    border-radius: inherit;
    display: block;
    height: 100%;
    transition: width .2s ease;
}

.ainpa-player-side-tabs {
    border-bottom: 1px solid var(--ainpa-player-line);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding: 0 22px;
}

.ainpa-player-side-tabs button {
    background: transparent;
    border: 0;
    color: var(--ainpa-player-muted);
    cursor: pointer;
    font-size: 13px;
    font-weight: 780;
    min-height: 60px;
    position: relative;
}

.ainpa-player-side-tabs button::after {
    background: var(--ainpa-player-red);
    bottom: 0;
    content: "";
    height: 3px;
    left: 0;
    opacity: 0;
    position: absolute;
    right: 0;
}

.ainpa-player-side-tabs button.is-active {
    color: var(--ainpa-player-red);
}

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

.ainpa-player-side-panel {
    display: none;
    overflow-y: auto;
    padding: 18px 20px 22px;
}

.ainpa-player-side-panel.is-active {
    display: block;
}

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

.ainpa-player-section.is-untitled {
    margin-top: 8px;
    padding-top: 8px;
}

.ainpa-player-section-head {
    align-items: center;
    background: transparent;
    border: 0;
    color: var(--ainpa-player-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    min-height: 52px;
    padding: 0 2px;
    text-align: left;
    width: 100%;
}

.ainpa-player-section-head span {
    font-size: 14px;
    font-weight: 830;
}

.ainpa-player-section-head small {
    color: var(--ainpa-player-muted);
    font-size: 12px;
}

.ainpa-player-section-head::after {
    border-bottom: 2px solid currentColor;
    border-right: 2px solid currentColor;
    content: "";
    flex: 0 0 auto;
    height: 7px;
    margin-left: 8px;
    transform: rotate(45deg);
    transition: transform .18s ease;
    width: 7px;
}

.ainpa-player-section.is-open .ainpa-player-section-head::after {
    transform: rotate(225deg);
}

.ainpa-player-lesson-list {
    display: none;
    padding-bottom: 10px;
}

.ainpa-player-section.is-open .ainpa-player-lesson-list {
    display: grid;
    gap: 3px;
}

.ainpa-player-lesson {
    align-items: center;
    border-left: 3px solid transparent;
    border-radius: 7px;
    color: var(--ainpa-player-text);
    display: grid;
    gap: 8px;
    grid-template-columns: 24px 28px minmax(0, 1fr) auto 16px;
    min-height: 45px;
    padding: 7px 8px;
    text-decoration: none;
}

.ainpa-player-lesson:hover {
    background: var(--ainpa-player-soft);
}

.ainpa-player-lesson.is-active {
    background: #fff1f2;
    border-left-color: var(--ainpa-player-red);
}

.ainpa-player-lesson-icon {
    border: 1px solid #a3adbd;
    border-radius: 999px;
    height: 16px;
    position: relative;
    width: 16px;
}

.ainpa-player-lesson-icon::after {
    border-bottom: 4px solid transparent;
    border-left: 6px solid #667085;
    border-top: 4px solid transparent;
    content: "";
    left: 6px;
    position: absolute;
    top: 3px;
}

.ainpa-player-lesson.is-active .ainpa-player-lesson-icon {
    background: var(--ainpa-player-red);
    border-color: var(--ainpa-player-red);
}

.ainpa-player-lesson.is-active .ainpa-player-lesson-icon::after {
    border-left-color: #fff;
}

.ainpa-player-lesson strong,
.ainpa-player-lesson small {
    color: var(--ainpa-player-muted);
    font-size: 12px;
    font-weight: 700;
}

.ainpa-player-lesson b {
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ainpa-player-lesson em {
    border: 1px solid #c5cfdd;
    border-radius: 999px;
    display: block;
    height: 14px;
    width: 14px;
}

.ainpa-player-lesson.is-complete em {
    background: var(--ainpa-player-green);
    border-color: var(--ainpa-player-green);
}

/* Keep lesson metadata legible when titles are long. */
.ainpa-player-lesson {
    align-items: start;
    grid-template-columns: 20px 30px minmax(0, 1fr) auto;
    min-height: 54px;
}

.ainpa-player-lesson-icon {
    margin-top: 4px;
}

.ainpa-player-lesson b {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: clip;
    white-space: normal;
}

.ainpa-player-lesson-meta {
    align-items: center;
    align-self: center;
    display: inline-flex;
    gap: 6px;
    justify-content: flex-end;
    min-width: 34px;
    white-space: nowrap;
}

.ainpa-player-lesson-meta em {
    flex: 0 0 auto;
}

.ainpa-player-lesson-meta em.is-locked {
    background: #f1f3f5;
    border: 0;
    color: #667085;
    font-size: 10px;
    font-style: normal;
    font-weight: 750;
    height: auto;
    padding: 3px 5px;
    width: auto;
}

.ainpa-player-lesson.is-locked {
    background: #f8f9fa;
    opacity: 1;
}

.ainpa-player-lesson.is-locked em.is-locked {
    color: #667085;
}

.ainpa-player-lesson.is-complete .ainpa-player-lesson-meta em:not(.is-locked)::after {
    color: #fff;
    content: "\2713";
    display: block;
    font-size: 10px;
    line-height: 12px;
    text-align: center;
}

.ainpa-player-help {
    border: 1px solid var(--ainpa-player-line);
    border-radius: var(--ainpa-player-radius);
    margin-top: 20px;
    padding: 18px;
}

.ainpa-player-help strong {
    display: block;
    margin-bottom: 8px;
}

.ainpa-player-help p,
.ainpa-player-help a {
    color: var(--ainpa-player-muted);
    font-size: 13px;
    line-height: 1.6;
}

.ainpa-player-help a {
    color: var(--ainpa-player-red);
    font-weight: 800;
    text-decoration: none;
}

.ainpa-player-notes {
    display: grid;
    gap: 10px;
}

.ainpa-player-notes span {
    font-size: 14px;
    font-weight: 850;
}

.ainpa-player-notes textarea {
    border: 1px solid var(--ainpa-player-line);
    border-radius: var(--ainpa-player-radius);
    color: var(--ainpa-player-text);
    font: inherit;
    line-height: 1.6;
    outline: 0;
    padding: 13px;
    resize: vertical;
}

.ainpa-player-notes textarea:focus {
    border-color: var(--ainpa-player-red);
    box-shadow: 0 0 0 3px rgba(229, 31, 39, .12);
}

.ainpa-player-note-status {
    color: var(--ainpa-player-muted);
    font-size: 12px;
}

.ainpa-player-main {
    min-width: 0;
}

.ainpa-player-topbar {
    align-items: center;
    background: var(--ainpa-player-surface);
    border-bottom: 1px solid var(--ainpa-player-line);
    display: grid;
    gap: 24px;
    grid-template-columns: 220px minmax(280px, 1fr) auto;
    height: 82px;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 12;
}

.ainpa-player-top-left {
    align-items: center;
    display: flex;
    gap: 20px;
}

.ainpa-player-top-left a {
    color: var(--ainpa-player-text);
    font-weight: 820;
    text-decoration: none;
}

.ainpa-player-progress-top {
    align-items: center;
    display: grid;
    gap: 14px;
    grid-template-columns: auto minmax(140px, 250px) auto;
    justify-content: center;
}

.ainpa-player-progress-top span,
.ainpa-player-progress-top strong {
    font-size: 13px;
    font-weight: 800;
}

.ainpa-player-user {
    align-items: center;
    display: flex;
    gap: 14px;
}

.ainpa-player-user button {
    background: #fff;
    border: 0;
    cursor: pointer;
    height: 38px;
    position: relative;
    width: 38px;
}

.ainpa-player-user [data-theme-toggle]::before {
    border: 2px solid var(--ainpa-player-text);
    border-radius: 999px;
    content: "";
    height: 17px;
    left: 9px;
    position: absolute;
    top: 9px;
    width: 17px;
}

.ainpa-player-user [data-notification-button]::before {
    border: 2px solid var(--ainpa-player-text);
    border-radius: 8px 8px 4px 4px;
    content: "";
    height: 18px;
    left: 10px;
    position: absolute;
    top: 9px;
    width: 15px;
}

.ainpa-player-user button b {
    align-items: center;
    background: var(--ainpa-player-red);
    border-radius: 999px;
    color: #fff;
    display: flex;
    font-size: 10px;
    height: 17px;
    justify-content: center;
    position: absolute;
    right: 2px;
    top: 3px;
    width: 17px;
}

.ainpa-player-user > span {
    align-items: center;
    background: #172033;
    border-radius: 999px;
    color: #fff;
    display: flex;
    font-size: 13px;
    font-weight: 900;
    height: 42px;
    justify-content: center;
    width: 42px;
}

.ainpa-player-user strong {
    font-size: 14px;
    white-space: nowrap;
}

.ainpa-player-content {
    padding: 26px 36px 28px;
}

.ainpa-player-content-head {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 22px;
}

.ainpa-player-breadcrumb {
    align-items: center;
    display: flex;
    flex-wrap: nowrap;
    gap: 12px;
    margin: 0;
    min-width: 0;
    overflow: hidden;
    width: 100%;
}

.ainpa-player-breadcrumb a,
.ainpa-player-breadcrumb strong {
    color: var(--ainpa-player-muted);
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
}

.ainpa-player-breadcrumb strong {
    color: var(--ainpa-player-text);
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ainpa-player-breadcrumb a {
    flex: 0 1 auto;
    max-width: 28%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ainpa-player-breadcrumb span {
    border-right: 1px solid var(--ainpa-player-muted-2);
    border-top: 1px solid var(--ainpa-player-muted-2);
    height: 7px;
    transform: rotate(45deg);
    width: 7px;
    flex: 0 0 auto;
}

.ainpa-player-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin: 0;
}

.ainpa-player-btn.is-complete {
    font-size: 0;
}

.ainpa-player-btn.is-complete::after {
    content: "Completed \002713";
    font-size: 14px;
}

.ainpa-player-btn,
.ainpa-player-icon-btn {
    background: var(--ainpa-player-surface);
    border: 1px solid var(--ainpa-player-line);
    border-radius: var(--ainpa-player-radius);
    color: var(--ainpa-player-text);
    cursor: pointer;
    font-size: 14px;
    font-weight: 780;
    min-height: 42px;
}

.ainpa-player-btn {
    padding: 0 18px;
}

.ainpa-player-btn.is-complete {
    background: var(--ainpa-player-green);
    border-color: var(--ainpa-player-green);
    color: #fff;
}

.ainpa-player-btn:disabled {
    cursor: default;
    opacity: 1;
}


.ainpa-player-icon-btn {
    align-items: center;
    display: inline-flex;
    justify-content: center;
    position: relative;
    width: 44px;
}

.ainpa-player-icon-btn[data-bookmark]::before,
.ainpa-player-icon-btn[data-fullscreen]::before,
.ainpa-player-icon-btn[data-fullscreen]::after,
.ainpa-player-controls [data-volume-toggle]::before,
.ainpa-player-controls [data-settings-toggle]::before,
.ainpa-player-controls [data-fullscreen]::before {
    display: none;
}

.ainpa-player-icon-btn[data-bookmark]::before {
    border: 2px solid var(--ainpa-player-text);
    border-bottom: 0;
    border-radius: 3px 3px 0 0;
    content: "";
    height: 22px;
    left: 15px;
    position: absolute;
    top: 9px;
    width: 14px;
}

.ainpa-player-icon-btn[data-bookmark].is-active::before {
    background: var(--ainpa-player-red);
    border-color: var(--ainpa-player-red);
}

.ainpa-player-icon-btn[data-bookmark].is-active svg {
    color: var(--ainpa-player-red);
    fill: rgba(229, 31, 39, .12);
}

.ainpa-player-icon-btn[data-fullscreen]::before {
    border-left: 2px solid var(--ainpa-player-text);
    border-top: 2px solid var(--ainpa-player-text);
    content: "";
    height: 13px;
    left: 11px;
    position: absolute;
    top: 11px;
    width: 13px;
}

.ainpa-player-icon-btn[data-fullscreen]::after {
    border-bottom: 2px solid var(--ainpa-player-text);
    border-right: 2px solid var(--ainpa-player-text);
    bottom: 11px;
    content: "";
    height: 13px;
    position: absolute;
    right: 11px;
    width: 13px;
}

.ainpa-player-video {
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: var(--ainpa-player-radius);
    box-shadow: var(--ainpa-player-shadow);
    isolation: isolate;
    min-height: 430px;
    overflow: hidden;
    position: relative;
}

.ainpa-player-video img,
.ainpa-player-video-fallback,
.ainpa-player-video-mount iframe,
.ainpa-player-video-mount video,
.ainpa-player-youtube-target {
    display: block;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    width: 100%;
}

.ainpa-player-video-fallback {
    align-items: center;
    color: #fff;
    display: flex;
    font-size: 54px;
    font-weight: 900;
    justify-content: center;
}

.ainpa-player-video-mount {
    background: #000;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    position: absolute;
    z-index: 1;
}

.ainpa-player-video.is-playing .ainpa-player-video-mount {
    opacity: 1;
    pointer-events: none;
}

.ainpa-player-video-mount iframe,
.ainpa-player-video-mount video,
.ainpa-player-youtube-target,
.ainpa-player-youtube-target iframe {
    border: 0;
    height: 100%;
    width: 100%;
}

.ainpa-player-video-mount video {
    object-fit: contain;
}

.ainpa-player-video-mount.is-provider-a .ainpa-player-youtube-target {
    overflow: hidden;
}

.ainpa-player-video-mount.is-provider-a .ainpa-player-youtube-target iframe {
    height: 108% !important;
    left: -4%;
    max-width: none;
    position: relative;
    top: -4%;
    width: 108% !important;
}

.ainpa-player-video.is-playing [data-video-poster],
.ainpa-player-video.is-playing .ainpa-player-play {
    opacity: 0;
    pointer-events: none;
}

.ainpa-player-play {
    align-items: center;
    background: rgba(17, 24, 39, .78);
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    display: flex;
    height: 76px;
    justify-content: center;
    left: 50%;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 76px;
    z-index: 3;
}

.ainpa-player-play span,
.ainpa-player-controls [data-video-play-small] span {
    border-bottom: 13px solid transparent;
    border-left: 18px solid #fff;
    border-top: 13px solid transparent;
    display: block;
    height: 0;
    margin-left: 5px;
    width: 0;
}

.ainpa-player-play {
    color: #fff;
}

.ainpa-player-play svg {
    height: 34px;
    margin-left: 4px;
    width: 34px;
}

.ainpa-player-controls {
    align-items: center;
    background: linear-gradient(180deg, rgba(12, 18, 32, .28), rgba(12, 18, 32, .92));
    bottom: 0;
    color: #fff;
    display: grid;
    gap: 16px;
    grid-template-columns: 34px 34px auto minmax(160px, 1fr) auto auto 34px 34px;
    left: 0;
    min-height: 54px;
    padding: 0 18px;
    position: absolute;
    right: 0;
    z-index: 5;
}

.ainpa-player-controls button {
    align-items: center;
    background: transparent;
    border: 0;
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    font-weight: 800;
    justify-content: center;
    min-height: 32px;
    padding: 0;
}

.ainpa-player-controls [data-video-play-small] .ainpa-player-control-pause-icon {
    display: none;
}

.ainpa-player-video.is-video-running .ainpa-player-controls [data-video-play-small] .ainpa-player-control-play-icon {
    display: none;
}

.ainpa-player-video.is-video-running .ainpa-player-controls [data-video-play-small] .ainpa-player-control-pause-icon {
    display: block;
}

.ainpa-player-video.is-video-running .ainpa-player-controls [data-video-play-small] span {
    background: linear-gradient(90deg, #fff 0 35%, transparent 35% 65%, #fff 65% 100%);
    border: 0;
    height: 18px;
    margin-left: 0;
    width: 16px;
}

.ainpa-player-controls [data-volume-toggle]::before,
.ainpa-player-controls [data-settings-toggle]::before,
.ainpa-player-controls [data-fullscreen]::before {
    border: 2px solid #fff;
    content: "";
    display: block;
    height: 16px;
    margin: auto;
    width: 16px;
}

.ainpa-player-controls [data-volume-toggle]::before,
.ainpa-player-controls [data-settings-toggle]::before,
.ainpa-player-controls [data-fullscreen]::before {
    display: none;
}

.ainpa-player-controls [data-volume-toggle].is-muted svg {
    opacity: .45;
}

.ainpa-player-controls time {
    font-size: 14px;
    font-weight: 720;
    white-space: nowrap;
}

.ainpa-player-timeline {
    background: rgba(255, 255, 255, .4);
    border-radius: 999px;
    cursor: pointer;
    height: 5px;
    position: relative;
}

.ainpa-player-timeline span {
    background: var(--ainpa-player-red);
    border-radius: inherit;
    display: block;
    height: 100%;
}

.ainpa-player-timeline button {
    background: #fff;
    border: 4px solid var(--ainpa-player-red);
    border-radius: 999px;
    height: 17px;
    left: 28%;
    min-height: 0;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 17px;
}

.ainpa-player-lesson-layout {
    align-items: start;
    display: grid;
    gap: 28px;
    grid-template-columns: minmax(0, 1fr) 350px;
    margin-top: 24px;
}

.ainpa-player-lesson-copy h2 {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 0;
    margin: 0 0 12px;
}

.ainpa-player-lesson-copy p,
.ainpa-player-lesson-copy li {
    color: var(--ainpa-player-muted);
    font-size: 15px;
    line-height: 1.75;
}

.ainpa-player-lesson-copy hr {
    border: 0;
    border-top: 1px solid var(--ainpa-player-line);
    margin: 20px 0;
}

.ainpa-player-lesson-copy h3 {
    font-size: 15px;
    margin: 0 0 16px;
}

.ainpa-player-lesson-copy ul {
    display: grid;
    gap: 16px 70px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    list-style: none;
    margin: 0;
    padding: 0;
}

.ainpa-player-lesson-copy li {
    padding-left: 28px;
    position: relative;
}

.ainpa-player-lesson-copy li::before {
    color: var(--ainpa-player-red);
    content: "✓";
    font-weight: 900;
    left: 0;
    position: absolute;
}

.ainpa-player-lesson-copy li::before {
    content: "\2713";
}

.ainpa-player-resources-card {
    background: var(--ainpa-player-surface);
    border: 1px solid var(--ainpa-player-line);
    border-radius: var(--ainpa-player-radius);
    box-shadow: 0 12px 34px rgba(15, 23, 42, .05);
    padding: 18px;
}

.ainpa-player-resources-card h2 {
    font-size: 18px;
    font-weight: 860;
    margin: 0 0 14px;
}

.ainpa-player-resource-list {
    display: grid;
    gap: 10px;
}

.ainpa-player-resource {
    align-items: center;
    border: 1px solid var(--ainpa-player-line);
    border-radius: var(--ainpa-player-radius);
    color: var(--ainpa-player-text);
    display: grid;
    gap: 4px 12px;
    grid-template-columns: 38px minmax(0, 1fr) auto;
    min-height: 58px;
    padding: 10px 12px;
    text-decoration: none;
}

.ainpa-player-resource span {
    align-items: center;
    border: 1px solid #fecaca;
    border-radius: 6px;
    color: var(--ainpa-player-red);
    display: flex;
    font-size: 10px;
    font-weight: 900;
    height: 34px;
    justify-content: center;
    grid-row: span 2;
    width: 30px;
}

.ainpa-player-resource strong {
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ainpa-player-resource small {
    color: var(--ainpa-player-muted);
    font-size: 12px;
}

.ainpa-player-resource-info {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.ainpa-player-resource-action {
    align-items: center;
    border: 1px solid var(--ainpa-player-red);
    border-radius: 7px;
    color: var(--ainpa-player-red);
    display: inline-flex;
    font-size: 11px;
    font-weight: 800;
    justify-content: center;
    min-height: 32px;
    padding: 0 10px;
    text-decoration: none;
    white-space: nowrap;
}

.ainpa-player-resource-action:hover {
    background: var(--ainpa-player-red);
    color: #fff;
}

.ainpa-player-resource-action.is-disabled {
    border-color: #d0d5dd;
    color: #667085;
}

.ainpa-player-bottom-nav {
    align-items: center;
    background: rgba(255, 255, 255, .86);
    border: 1px solid var(--ainpa-player-line);
    border-radius: 12px 12px 0 0;
    display: grid;
    gap: 20px;
    grid-template-columns: 220px minmax(0, 1fr) 260px;
    margin-top: 18px;
    padding: 16px 22px;
}

.ainpa-player-bottom-nav a,
.ainpa-player-bottom-nav button,
.ainpa-player-bottom-nav > span {
    border: 1px solid var(--ainpa-player-line);
    border-radius: var(--ainpa-player-radius);
    color: var(--ainpa-player-text);
    display: grid;
    min-height: 58px;
    padding: 10px 16px;
    text-decoration: none;
}

.ainpa-player-bottom-nav button {
    cursor: pointer;
    text-align: left;
    width: 100%;
}

.ainpa-player-bottom-nav button:disabled {
    cursor: wait;
}

.ainpa-player-bottom-nav span span,
.ainpa-player-bottom-nav a span,
.ainpa-player-bottom-nav button span {
    color: var(--ainpa-player-muted);
    font-size: 12px;
    font-weight: 720;
}

.ainpa-player-bottom-nav strong {
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ainpa-player-bottom-nav > div {
    color: var(--ainpa-player-muted);
    font-size: 14px;
    font-weight: 760;
    text-align: center;
}

.ainpa-player-next {
    background: var(--ainpa-player-red);
    border-color: var(--ainpa-player-red) !important;
    color: #fff !important;
}

.ainpa-player-next span,
.ainpa-player-next strong {
    color: #fff !important;
}

.ainpa-player-complete-next:not(:disabled):hover {
    background: var(--ainpa-player-red-dark);
}

.ainpa-player-complete-next.is-loading {
    opacity: .82;
}

.ainpa-player-prev.is-disabled,
.ainpa-player-next.is-disabled {
    background: #f3f4f6;
    border-color: #d8dee7 !important;
    color: #667085 !important;
    opacity: 1;
}

.ainpa-player-next.is-disabled span,
.ainpa-player-next.is-disabled strong {
    color: #667085 !important;
}

.ainpa-player-next.is-disabled > span:first-child {
    font-size: 0;
}

.ainpa-player-next.is-disabled > span:first-child::before {
    content: "\1F512  Next Lesson Locked";
    font-size: 12px;
}

.ainpa-player.is-dark {
    --ainpa-player-bg: #0f172a;
    --ainpa-player-surface: #111827;
    --ainpa-player-soft: #182235;
    --ainpa-player-line: #273449;
    --ainpa-player-line-strong: #334155;
    --ainpa-player-text: #f8fafc;
    --ainpa-player-muted: #b6c1d2;
    --ainpa-player-muted-2: #8ea0b8;
}

@media (max-width: 1180px) {
    .ainpa-player {
        grid-template-columns: 1fr;
    }

    .ainpa-player-sidebar {
        bottom: 0;
        left: 0;
        max-width: 360px;
        position: fixed;
        top: 0;
        transform: translateX(-105%);
        transition: transform .2s ease;
        width: min(90vw, 360px);
    }

    .ainpa-player.is-sidebar-open .ainpa-player-sidebar {
        transform: translateX(0);
    }

    .ainpa-player-topbar {
        grid-template-columns: auto minmax(220px, 1fr) auto;
    }

}

@media (max-width: 860px) {
    .ainpa-player-topbar {
        gap: 14px;
        grid-template-columns: 1fr auto;
        height: auto;
        padding: 14px 18px;
    }

    .ainpa-player-progress-top {
        grid-column: 1 / -1;
        grid-row: 2;
        justify-content: stretch;
    }

    .ainpa-player-user strong {
        display: none;
    }

    .ainpa-player-content {
        padding: 20px 14px 28px;
    }

    .ainpa-player-content-head {
        align-items: start;
        margin-bottom: 16px;
    }

    .ainpa-player-actions {
        justify-content: flex-start;
    }

    .ainpa-player-video {
        aspect-ratio: 16 / 9;
    }

    .ainpa-player-video img,
    .ainpa-player-video-fallback,
    .ainpa-player-video-mount iframe,
    .ainpa-player-video-mount video,
    .ainpa-player-youtube-target {
        height: 100%;
        min-height: 0;
    }

    .ainpa-player-controls {
        gap: 8px;
        grid-template-columns: 30px 30px auto 1fr;
        overflow-x: auto;
    }

    .ainpa-player-controls [data-speed-toggle],
    .ainpa-player-controls [data-caption-toggle],
    .ainpa-player-controls [data-settings-toggle],
    .ainpa-player-controls [data-fullscreen] {
        display: none;
    }

    .ainpa-player-lesson-layout,
    .ainpa-player-bottom-nav {
        grid-template-columns: 1fr;
    }

    .ainpa-player-lesson-copy ul {
        grid-template-columns: 1fr;
    }
}

/* Course player mobile layout v2. */
@media (max-width: 600px) {
    .ainpa-player {
        overflow-x: clip;
    }

    .ainpa-player-topbar {
        gap: 12px;
        grid-template-columns: minmax(0, 1fr) auto;
        padding: 12px 18px 14px;
    }

    .ainpa-player-top-left {
        gap: 12px;
        min-width: 0;
    }

    .ainpa-player-top-left button {
        height: 36px;
        width: 36px;
    }

    .ainpa-player-top-left a {
        font-size: 19px;
        line-height: 1.15;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .ainpa-player-user {
        gap: 4px;
    }

    .ainpa-player-user button {
        height: 36px;
        width: 36px;
    }

    .ainpa-player-progress-top {
        gap: 10px;
        grid-template-columns: 84px minmax(0, 1fr) 82px;
        width: 100%;
    }

    .ainpa-player-progress-top span,
    .ainpa-player-progress-top strong {
        font-size: 13px;
        line-height: 1.25;
    }

    .ainpa-player-content {
        padding: 18px 18px 34px;
    }

    .ainpa-player-content-head {
        gap: 14px;
        margin-bottom: 18px;
    }

    .ainpa-player-breadcrumb {
        gap: 9px;
    }

    .ainpa-player-breadcrumb a,
    .ainpa-player-breadcrumb strong {
        font-size: 13px;
    }

    .ainpa-player-actions {
        gap: 12px;
    }

    .ainpa-player-icon-btn {
        min-height: 58px;
        width: 60px;
    }

    .ainpa-player-video {
        border-radius: 8px;
        min-height: 0;
    }

    .ainpa-player-controls {
        gap: 8px;
        grid-template-columns: 30px 30px auto minmax(0, 1fr);
        padding: 0 14px;
    }

    .ainpa-player-controls time {
        font-size: 13px;
    }

    .ainpa-player-lesson-layout {
        gap: 20px;
        margin-top: 28px;
    }

    .ainpa-player-lesson-copy h2 {
        font-size: clamp(27px, 8vw, 32px);
        line-height: 1.27;
        margin-bottom: 18px;
        overflow-wrap: anywhere;
    }

    .ainpa-player-lesson-copy p,
    .ainpa-player-lesson-copy li {
        font-size: 15px;
        line-height: 1.75;
    }

    .ainpa-player-resources-card {
        border-radius: 12px;
        padding: 16px;
    }

    .ainpa-player-bottom-nav {
        gap: 12px;
        margin-top: 26px;
        padding: 14px 16px;
    }

    .ainpa-player-bottom-nav a,
    .ainpa-player-bottom-nav button,
    .ainpa-player-bottom-nav > span {
        min-height: 70px;
        padding: 12px 16px;
    }
}

/* Course player breadcrumb mobile v3. */
@media (max-width: 600px) {
    .ainpa-player-breadcrumb {
        gap: 8px;
        width: 100%;
        min-height: 44px;
        padding: 8px 11px;
        background: var(--ainpa-player-surface);
        border: 1px solid var(--ainpa-player-line);
        border-radius: 10px;
        box-shadow: 0 5px 16px rgba(15, 23, 42, .04);
        overflow-x: auto;
        overflow-y: hidden;
        overscroll-behavior-x: contain;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }

    .ainpa-player-breadcrumb::-webkit-scrollbar {
        display: none;
    }

    .ainpa-player-breadcrumb a,
    .ainpa-player-breadcrumb strong {
        flex: 0 0 auto;
        max-width: 150px;
        font-size: 12px;
        line-height: 1.35;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .ainpa-player-breadcrumb a {
        color: var(--ainpa-player-muted);
        font-weight: 720;
    }

    .ainpa-player-breadcrumb strong {
        max-width: min(62vw, 230px);
        color: var(--ainpa-player-text);
        font-weight: 850;
    }

    .ainpa-player-breadcrumb span {
        width: 6px;
        height: 6px;
        color: var(--ainpa-player-muted-2);
        opacity: .85;
    }
}

/* Course player account menu v4. */
.ainpa-player-account {
    position: relative;
}

.ainpa-player-account summary {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 50px;
    padding: 4px 10px 4px 4px;
    border-radius: 12px;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.ainpa-player-account summary::-webkit-details-marker {
    display: none;
}

.ainpa-player-account summary::after {
    width: 7px;
    height: 7px;
    margin-left: 2px;
    border-right: 2px solid var(--ainpa-player-muted);
    border-bottom: 2px solid var(--ainpa-player-muted);
    content: "";
    transform: rotate(45deg) translateY(-2px);
    transition: transform .18s ease;
}

.ainpa-player-account[open] summary {
    background: var(--ainpa-player-soft);
}

.ainpa-player-account[open] summary::after {
    transform: rotate(225deg) translate(-1px, -1px);
}

.ainpa-player-account-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    border-radius: 999px;
    background: #172033;
    color: #fff;
    font-size: 13px;
    font-weight: 900;
}

.ainpa-player-account-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 40;
    width: 210px;
    padding: 7px;
    background: var(--ainpa-player-surface);
    border: 1px solid var(--ainpa-player-line);
    border-radius: 12px;
    box-shadow: 0 18px 44px rgba(15, 23, 42, .16);
}

.ainpa-player-account-menu a,
.ainpa-player-account-menu button {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 42px;
    height: auto;
    padding: 9px 11px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--ainpa-player-text);
    font: inherit;
    font-size: 13px;
    font-weight: 760;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
}

.ainpa-player-account-menu a:hover,
.ainpa-player-account-menu a:focus-visible,
.ainpa-player-account-menu button:hover,
.ainpa-player-account-menu button:focus-visible {
    background: var(--ainpa-player-soft);
    outline: none;
}

.ainpa-player-account-menu form {
    margin: 3px 0 0;
    padding-top: 3px;
    border-top: 1px solid var(--ainpa-player-line);
}

.ainpa-player-account-menu form button {
    color: var(--ainpa-player-red);
}

@media (max-width: 860px) {
    .ainpa-player-account summary {
        min-height: 42px;
        padding: 0;
    }

    .ainpa-player-account summary::after {
        display: none;
    }

    .ainpa-player-account-menu {
        width: min(210px, calc(100vw - 28px));
    }
}