.course-profile {
    --course-navy: #00046a;
    --course-ink: #071133;
    --course-blue: #2358ff;
    --course-cyan: #08d7cf;
    --course-muted: #5f6f87;
    --course-border: #dfe7f2;
    --course-soft: #f6f9fd;
    --course-panel: #ffffff;
    --course-shadow: 0 18px 46px rgba(15, 23, 42, .08);
    background: linear-gradient(180deg, #f7fbff 0%, #eef5f8 100%);
    color: var(--course-ink);
    min-height: 100vh;
    padding-bottom: 72px;
}

.course-profile-shell {
    width: min(100% - 36px, 1280px);
    margin: 0 auto;
}

.course-hero {
    position: relative;
    overflow: hidden;
    min-height: 450px;
    background:
        linear-gradient(90deg, rgba(0, 4, 106, .94) 0%, rgba(0, 4, 106, .76) 46%, rgba(0, 4, 106, .2) 100%),
        var(--course-hero-image) center center / cover no-repeat,
        var(--course-navy);
    color: #fff;
    isolation: isolate;
}

.course-hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 92px;
    background: linear-gradient(180deg, rgba(247, 251, 255, 0), #f7fbff 92%);
    pointer-events: none;
    z-index: 0;
}

.course-hero__inner {
    position: relative;
    z-index: 1;
    width: min(100% - 36px, 1280px);
    min-height: 450px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 18px;
    padding: 68px 0 104px;
}

.course-hero h1 {
    max-width: 820px;
    margin: 0;
    color: #fff;
    font-size: clamp(2.45rem, 5vw, 5.4rem);
    font-weight: 900;
    line-height: .98;
    letter-spacing: 0;
}

.course-hero__summary {
    max-width: 760px;
    margin: 0;
    color: rgba(255, 255, 255, .86);
    font-size: clamp(1rem, 1.35vw, 1.22rem);
    line-height: 1.75;
    font-weight: 600;
}

.course-hero__instructor {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    width: fit-content;
    max-width: 100%;
    padding: 9px 14px 9px 9px;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 999px;
    background: rgba(255, 255, 255, .1);
    backdrop-filter: blur(12px);
}

.course-hero__avatar,
.course-cv-avatar {
    display: grid;
    place-items: center;
    overflow: hidden;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--course-navy), var(--course-cyan));
    color: #fff;
    flex: 0 0 auto;
}

.course-hero__avatar {
    width: 46px;
    height: 46px;
}

.course-hero__avatar img,
.course-cv-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-hero__instructor strong,
.course-hero__instructor span {
    display: block;
}

.course-hero__instructor strong {
    color: #fff;
    font-size: 15px;
    font-weight: 900;
}

.course-hero__instructor span {
    color: rgba(255, 255, 255, .72);
    font-size: 12px;
    font-weight: 700;
}

.course-details-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(310px, 360px);
    gap: 28px;
    align-items: start;
    margin-top: -92px;
    position: relative;
    z-index: 2;
}

.course-tabs-shell,
.course-access-panel {
    border: 1px solid var(--course-border);
    border-radius: 10px;
    background: var(--course-panel);
    box-shadow: var(--course-shadow);
}

.course-tabs-shell {
    display: flex;
    flex-direction: column;
    align-self: start;
    overflow: hidden;
}

.course-tabs-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 58px;
    padding: 8px 16px;
    margin: 0;
    border-bottom: 1px solid var(--course-border);
    background: #fff;
}

.course-tabs {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
}

.course-tabs button,
.course-content-tools button,
.course-language-toggle button {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--course-muted);
    font: inherit;
    cursor: pointer;
}

.course-tabs button {
    min-height: 40px;
    padding: 0 15px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 900;
    white-space: nowrap;
}

.course-tabs button.active {
    background: rgba(8, 215, 207, .1);
    color: var(--course-navy);
    box-shadow: inset 0 -3px 0 var(--course-cyan);
}

.course-language-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    border: 1px solid var(--course-border);
    border-radius: 999px;
    background: #fff;
    box-shadow: 0 8px 20px rgba(15, 23, 42, .05);
}

.course-language-toggle button {
    min-width: 40px;
    min-height: 32px;
    border-radius: 999px;
    color: var(--course-muted);
    font-size: 12px;
    font-weight: 900;
}

.course-language-toggle button.active {
    background: var(--course-navy);
    color: #fff;
    box-shadow: 0 7px 16px rgba(0, 4, 106, .22);
}

.course-language-toggle button:disabled {
    cursor: not-allowed;
    opacity: .42;
}

.course-tab-content {
    padding: 20px 24px 28px;
}

.course-tab-panel[hidden],
.course-language-panel[hidden],
.course-empty-copy[hidden] {
    display: none !important;
}

.course-section-heading {
    margin-bottom: 18px;
}

.course-section-heading span,
.course-access-panel-heading span,
.course-language-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--course-blue);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .05em;
    text-transform: uppercase;
}

.course-section-heading h2,
.course-access-panel-heading h2 {
    margin: 5px 0 0;
    color: var(--course-navy);
    font-size: clamp(1.55rem, 2vw, 2.15rem);
    font-weight: 900;
    letter-spacing: 0;
    line-height: 1.12;
}

.course-section-heading p,
.course-access-panel-heading p {
    margin: 8px 0 0;
    color: var(--course-muted);
    font-size: 14px;
    line-height: 1.6;
}

.tass-rich-content {
    color: var(--course-ink);
    font-size: 16px;
    line-height: 1.78;
}

.tass-rich-content p {
    max-width: 86ch;
    margin: 0 0 16px;
}

.tass-rich-content ul,
.tass-rich-content ol {
    display: grid;
    gap: 12px;
    margin: 18px 0 0;
    padding-inline-start: 22px;
}

.tass-rich-content li {
    padding-inline-start: 4px;
}

.course-language-panel.tass-rich-content {
    padding: 24px;
    border: 1px solid var(--course-border);
    border-radius: 12px;
    background:
        linear-gradient(180deg, rgba(248, 251, 255, .75), #fff 42%),
        #fff;
}

.course-readable-subhead {
    margin: 20px 0 12px;
    color: var(--course-navy);
    font-size: 16px;
    font-weight: 950;
    line-height: 1.45;
}

.course-readable-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px !important;
    margin: 18px 0 0 !important;
    padding: 0 !important;
    list-style: none;
}

.course-readable-list li {
    position: relative;
    min-height: 54px;
    padding: 14px 16px 14px 44px;
    border: 1px solid #e5edf7;
    border-radius: 10px;
    background: #f8fbff;
    color: var(--course-ink);
    line-height: 1.62;
    box-shadow: 0 8px 18px rgba(15, 23, 42, .035);
}

.course-readable-list li::before {
    content: "";
    position: absolute;
    left: 18px;
    top: 22px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--course-cyan);
    box-shadow: 0 0 0 6px rgba(8, 215, 207, .12);
}

[dir="rtl"] .course-readable-list li {
    padding: 14px 44px 14px 16px;
    text-align: right;
}

[dir="rtl"] .course-readable-list li::before {
    right: 18px;
    left: auto;
}

.course-access-facts dt {
    color: var(--course-muted);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.course-access-facts dd {
    margin: 6px 0 0;
    color: var(--course-navy);
    font-size: 22px;
    font-weight: 950;
}

.course-content-tools {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin: -6px 0 16px;
}

.course-content-tools button {
    min-height: 34px;
    padding: 0 12px;
    border: 1px solid var(--course-border);
    border-radius: 8px;
    color: var(--course-navy);
    font-size: 12px;
    font-weight: 900;
}

.course-accordion {
    display: grid;
    gap: 12px;
}

.course-accordion-item {
    overflow: hidden;
    border: 1px solid var(--course-border);
    border-radius: 10px;
    background: #fff;
}

.course-accordion-item.is-preview {
    border-color: rgba(8, 215, 207, .45);
}

.course-accordion-toggle {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto auto;
    align-items: center;
    gap: 12px;
    width: 100%;
    min-height: 62px;
    padding: 14px 18px;
    border: 0;
    background: #fff;
    color: var(--course-ink);
    text-align: start;
    cursor: pointer;
}

.course-accordion-number {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--course-soft);
    color: var(--course-navy);
    font-size: 13px;
    font-weight: 950;
}

.course-accordion-title {
    min-width: 0;
    color: var(--course-navy);
    font-weight: 950;
}

.course-accordion-meta,
.course-accordion-toggle em {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    background: var(--course-soft);
    color: var(--course-muted);
    font-size: 12px;
    font-style: normal;
    font-weight: 900;
    white-space: nowrap;
}

.course-accordion-toggle em {
    background: rgba(8, 215, 207, .13);
    color: var(--course-navy);
}

.course-accordion-toggle[aria-expanded="true"] > .bi-chevron-down {
    transform: rotate(180deg);
}

.course-accordion-panel {
    padding: 0 18px 18px;
}

.course-video-list {
    display: grid;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.course-video-list li {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    border-top: 1px solid #edf2f8;
    color: var(--course-ink);
    font-size: 14px;
    font-weight: 750;
}

.course-video-list li > .bi {
    color: #99a7bc;
}

.course-video-list li.is-preview-video > .bi {
    color: var(--course-cyan);
}

.course-video-list span {
    min-width: 0;
}

.course-video-state {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-width: 28px;
    min-height: 28px;
    padding: 0 8px;
    border-radius: 999px;
    background: var(--course-soft);
    color: var(--course-muted);
    font-size: 12px;
    font-weight: 900;
    white-space: nowrap;
}

.course-video-state.is-preview {
    background: rgba(8, 215, 207, .13);
    color: var(--course-navy);
}

.course-empty-copy,
.course-empty-state {
    color: var(--course-muted);
    font-size: 14px;
    line-height: 1.7;
}

.course-empty-state {
    display: grid;
    place-items: center;
    gap: 12px;
    min-height: 170px;
    border: 1px dashed #cbd7e8;
    border-radius: 10px;
    background: var(--course-soft);
    text-align: center;
}

.course-empty-state i {
    color: var(--course-blue);
    font-size: 28px;
}

.course-instructor-profiles {
    display: grid;
    gap: 18px;
}

.course-instructor-profile {
    display: grid;
    grid-template-columns: minmax(210px, 260px) minmax(0, 1fr);
    gap: 24px;
    padding: 22px;
    border: 1px solid var(--course-border);
    border-radius: 10px;
    background: var(--course-soft);
}

.course-cv-summary {
    display: grid;
    align-content: start;
    gap: 14px;
}

.course-cv-avatar {
    width: 76px;
    height: 76px;
    font-size: 28px;
}

.course-cv-summary h3 {
    margin: 0;
    color: var(--course-navy);
    font-size: 20px;
    font-weight: 950;
    line-height: 1.25;
}

.course-cv-name-secondary,
.course-cv-role {
    margin: 5px 0 0;
    color: var(--course-muted);
    font-size: 13px;
    line-height: 1.45;
}

.course-cv-role {
    font-weight: 900;
}

.course-cv-article {
    min-width: 0;
}

.course-cv-language-panel {
    padding: 20px;
    border: 1px solid var(--course-border);
    border-radius: 10px;
    background: #fff;
}

.course-language-label {
    width: fit-content;
    margin-bottom: 14px;
    padding: 7px 11px;
    border: 1px solid var(--course-border);
    border-radius: 999px;
    background: var(--course-soft);
}

.course-cv-copy {
    font-size: 16px;
    line-height: 1.85;
}

.course-cv-copy .course-readable-list {
    grid-template-columns: 1fr;
}

.course-access-panel {
    position: sticky;
    top: 92px;
    padding: 18px;
}

.course-sidebar-preview {
    margin-bottom: 18px;
}

.course-preview-media {
    position: relative;
    display: grid;
    place-items: center;
    overflow: hidden;
    min-height: 206px;
    border-radius: 10px;
    background: #0f172a;
    color: #fff;
}

.course-preview-media.has-cover {
    background: #edf4f8;
}

.course-preview-media img,
.course-preview-media iframe {
    width: 100%;
    height: 100%;
    display: block;
}

.course-preview-media img {
    position: absolute;
    inset: 0;
    object-fit: cover;
}

.course-preview-media iframe {
    min-height: 206px;
    border: 0;
}

.course-preview-media.has-cover::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(7, 17, 51, .08), rgba(7, 17, 51, .58));
}

.course-preview-state {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    gap: 10px;
    padding: 18px;
    color: #fff;
    text-align: center;
}

.course-preview-state i {
    color: var(--course-cyan);
    font-size: 28px;
}

.course-preview-state strong {
    font-size: 14px;
    font-weight: 900;
}

.course-preview-caption {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 10px 0 0;
    color: var(--course-muted);
    font-size: 13px;
    font-weight: 800;
}

.course-preview-caption i {
    color: var(--course-blue);
}

.course-access-panel-heading {
    padding-bottom: 16px;
    border-bottom: 1px solid var(--course-border);
}

.course-access-facts {
    display: grid;
    gap: 10px;
    margin: 16px 0;
}

.course-access-facts div {
    padding: 16px;
    border: 1px solid var(--course-border);
    border-radius: 10px;
    background: var(--course-soft);
}

.course-access-facts dt {
    display: flex;
    align-items: center;
    gap: 8px;
}

.course-access-facts dt i,
.course-includes i {
    color: var(--course-blue);
}

.course-includes {
    padding: 16px;
    border: 1px solid var(--course-border);
    border-radius: 10px;
    background: #fff;
}

.course-includes h3 {
    margin: 0 0 12px;
    color: var(--course-navy);
    font-size: 15px;
    font-weight: 950;
}

.course-includes ul {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.course-includes li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--course-ink);
    font-size: 14px;
    font-weight: 800;
}

.course-access-actions {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.course-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 16px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 950;
    text-decoration: none;
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}

.course-btn:hover {
    transform: translateY(-1px);
    text-decoration: none;
}

.course-btn-primary {
    border: 1px solid var(--course-cyan);
    background: var(--course-cyan);
    color: var(--course-navy);
    box-shadow: 0 10px 22px rgba(8, 215, 207, .24);
}

.course-btn-outline {
    border: 1px solid var(--course-navy);
    background: #fff;
    color: var(--course-navy);
}

.course-access-note {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-top: 14px;
    padding: 12px;
    border-radius: 8px;
    background: rgba(8, 215, 207, .08);
    color: var(--course-muted);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.55;
}

.course-access-note i {
    color: var(--course-cyan);
    margin-top: 2px;
}

.course-profile button:focus-visible,
.course-profile a:focus-visible {
    outline: 3px solid rgba(8, 215, 207, .55);
    outline-offset: 3px;
}

.course-instructor-link {
    color: inherit;
    font-weight: 900;
    text-decoration: none;
}

.course-instructor-link:hover {
    color: var(--course-cyan);
    text-decoration: underline;
}

.course-related {
    margin-top: 34px;
}

.course-related-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.course-related-card {
    overflow: hidden;
    border: 1px solid var(--course-border);
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 12px 28px rgba(15, 23, 42, .07);
}

.course-related-media {
    min-height: 150px;
    display: grid;
    place-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--course-navy), var(--course-cyan));
    color: #fff;
    font-size: 34px;
}

.course-related-media img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.course-related-card > div {
    padding: 15px;
}

.course-related-card span {
    color: var(--course-blue);
    font-size: 11px;
    font-weight: 850;
    text-transform: uppercase;
}

.course-related-card h3 {
    margin: 7px 0;
    font-size: 18px;
    line-height: 1.3;
}

.course-related-card h3 a {
    color: var(--course-navy);
    text-decoration: none;
}

.course-related-card p {
    margin: 0;
    color: var(--course-muted);
    font-size: 13px;
}

@media (max-width: 1100px) {
    .course-related-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .course-details-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
        gap: 20px;
    }

    .course-tab-content {
        padding: 18px 20px 24px;
    }
}

@media (max-width: 940px) {
    .course-hero,
    .course-hero__inner {
        min-height: 390px;
    }

    .course-details-layout {
        display: flex;
        flex-direction: column;
        margin-top: -38px;
    }

    .course-access-panel {
        position: static;
        order: -1;
        width: 100%;
    }

    .course-preview-media,
    .course-preview-media iframe {
        min-height: 260px;
    }

    .course-instructor-profile {
        grid-template-columns: 1fr;
    }

    .course-readable-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .course-related-grid {
        grid-template-columns: 1fr;
    }
    .course-profile-shell,
    .course-hero__inner {
        width: min(100% - 24px, 1280px);
    }

    .course-hero,
    .course-hero__inner {
        min-height: 360px;
    }

    .course-hero__inner {
        padding: 46px 0 70px;
    }

    .course-hero h1 {
        font-size: clamp(2rem, 11vw, 3.2rem);
    }

    .course-hero__summary {
        font-size: 15px;
        line-height: 1.65;
    }

    .course-tabs-bar {
        align-items: stretch;
        flex-direction: column;
        min-height: 0;
        padding: 12px;
    }

    .course-tabs {
        width: 100%;
    }

    .course-language-toggle {
        align-self: flex-end;
    }

    .course-tab-content {
        padding: 16px;
    }

    .course-accordion-toggle {
        grid-template-columns: auto minmax(0, 1fr) auto;
    }

    .course-accordion-meta,
    .course-accordion-toggle em {
        display: none;
    }

    .course-video-list li {
        grid-template-columns: auto minmax(0, 1fr) auto;
    }
}

@media (max-width: 480px) {
    .course-profile {
        padding-bottom: 44px;
    }

    .course-hero__instructor {
        border-radius: 12px;
        align-items: flex-start;
    }

    .course-preview-media,
    .course-preview-media iframe {
        min-height: 210px;
    }

    .course-tabs button {
        padding: 0 12px;
        font-size: 13px;
    }
}