.course-page {
    max-width: 1120px;
    padding: 0;
    overflow: hidden;
}

.course-heading {
    padding: 48px 48px 28px;
}

.course-tabs {
    display: flex;
    width: fit-content;
    gap: 4px;
    margin-bottom: 28px;
    padding: 4px;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background-color: var(--color-surface-secondary);
}

.course-tabs a {
    padding: 8px 13px;
    border-radius: 7px;
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}

.course-tabs a:hover {
    color: var(--color-text);
}

.course-tabs .course-tabs__active {
    background-color: var(--color-surface);
    color: var(--color-accent-active);
    box-shadow: 0 1px 3px var(--color-shadow);
}

.course-heading h1,
.course-hero h1 {
    margin: 8px 0 12px;
}

.course-heading p,
.course-hero__description {
    max-width: 720px;
    margin: 0;
    color: var(--color-muted);
    font-size: 18px;
}

.course-eyebrow {
    color: var(--color-accent-active);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    padding: 0 48px 48px;
}

.course-card {
    display: flex;
    flex-direction: column;
    min-height: 300px;
    margin: 0;
    padding: 24px;
    border-radius: 16px;
    box-shadow: none;
    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        transform 0.2s ease;
}

.course-card:hover {
    border-color: var(--color-accent-border);
    box-shadow: 0 4px 12px var(--color-shadow);
    transform: translateY(-1px);
}

.course-card__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.course-badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border: 1px solid var(--color-accent-border);
    border-radius: 999px;
    background-color: var(--color-accent-light);
    color: var(--color-accent-active);
    font-size: 13px;
    font-weight: 700;
}

.course-badge--muted {
    border-color: var(--color-border);
    background-color: var(--color-background-alt);
    color: var(--color-muted);
}

.course-badge--warning {
    border-color: var(--color-warning-border);
    background-color: var(--color-warning-background);
    color: var(--color-warning);
}

.course-badge--neutral {
    border-color: var(--color-border);
    background-color: var(--color-surface-secondary);
    color: var(--color-text-secondary);
}

.course-card__body {
    flex: 1;
}

.course-card h2 {
    margin: 20px 0 10px;
    font-size: 23px;
}

.course-card h2 a {
    color: var(--color-text);
    text-decoration: none;
}

.course-card h2 a:hover {
    color: var(--color-accent-active);
}

.course-card__description,
.course-card__owner {
    color: var(--color-muted);
}

.course-card__owner {
    margin: 18px 0;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    font-size: 14px;
}

.course-card__owner strong {
    color: var(--color-text);
}

.course-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.course-stats {
    display: flex;
    flex-direction: column;
    color: var(--color-muted);
    font-size: 13px;
}

.course-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    min-height: 42px;
    padding: 10px 16px;
    border: 1px solid transparent;
    border-radius: 8px;
    background-color: var(--color-accent);
    color: var(--color-on-primary);
    font-weight: 700;
    text-decoration: none;
    transition:
        background-color 0.2s ease,
        color 0.2s ease,
        transform 0.2s ease;
}

.course-button:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-on-primary);
}

.course-button:active {
    background-color: var(--color-accent-active);
    color: var(--color-on-primary-active);
    transform: translateY(1px);
}

.course-button--secondary {
    border-color: var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-text);
}

.course-button--secondary:hover {
    border-color: var(--color-accent-border);
    background-color: var(--color-accent-light);
    color: var(--color-accent-active);
}

.course-empty {
    margin: 0 48px 48px;
    padding: 48px 24px;
    border: 1px dashed var(--color-border);
    border-radius: 16px;
    background-color: var(--color-background-alt);
    text-align: center;
}

.course-empty__icon {
    margin-bottom: 12px;
    font-size: 36px;
}

.course-empty h2,
.course-empty h3 {
    margin: 0 0 8px;
}

.course-empty p {
    max-width: 520px;
    margin: 0 auto 20px;
    color: var(--color-muted);
}

.course-empty--compact {
    margin: 0;
    padding: 32px 20px;
}

.course-back {
    display: inline-block;
    margin: 28px 48px 0;
    color: var(--color-muted);
    font-weight: 600;
    text-decoration: none;
}

.course-back:hover {
    color: var(--color-accent-active);
}

.course-hero {
    margin: 20px 48px 32px;
    padding: 36px;
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
    border-radius: 18px;
    background-color: var(--color-surface);
}

.course-hero__owner {
    margin: 24px 0 0;
    color: var(--color-muted);
}

.course-hero__owner strong {
    color: var(--color-text);
}

.course-content,
.course-join {
    margin: 0 48px 48px;
}

.course-section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}

.course-section-heading h2,
.course-join h2 {
    margin: 6px 0 0;
}

.course-access-label {
    padding: 7px 11px;
    border: 1px solid var(--color-accent-border);
    border-radius: 999px;
    background-color: var(--color-accent-light);
    color: var(--color-accent-active);
    font-size: 13px;
    font-weight: 700;
}

.course-section-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    border-radius: 9px;
    background-color: var(--color-surface-secondary);
    color: var(--color-text-secondary);
    font-family: "JetBrains Mono", monospace;
    font-size: 13px;
    font-weight: 700;
}

.course-program-summary {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
    margin-bottom: 18px;
    padding: 18px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background-color: var(--color-surface);
}

.course-program-summary .course-progress {
    margin: 0;
}

.course-program-summary__actions {
    display: flex;
    align-items: center;
}

.course-program-summary--complete {
    border-color: var(--color-success-border);
    background-color: var(--color-success-background);
}

.course-program-summary--complete progress::-webkit-progress-value {
    background-color: var(--color-success);
}

.course-program-summary--complete progress::-moz-progress-bar {
    background-color: var(--color-success);
}

.course-student-overview {
    display: grid;
    gap: 16px;
    margin-bottom: 24px;
    padding: 22px;
    border: 1px solid var(--color-accent-border);
    border-radius: 16px;
    background: var(--color-accent-light);
}

.course-student-overview__heading,
.course-student-progress,
.course-student-progress__bar > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.course-student-overview__heading h3 {
    margin: 4px 0 0;
}

.course-student-overview__heading > span {
    display: inline-grid;
    min-width: 36px;
    height: 36px;
    place-items: center;
    border-radius: 999px;
    background: var(--color-accent);
    color: var(--color-on-accent);
    font-family: "JetBrains Mono", monospace;
    font-weight: 800;
}

.course-student-overview__list {
    display: grid;
    gap: 10px;
}

.course-student-progress {
    padding: 15px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-surface);
}

.course-student-progress__identity {
    display: grid;
    min-width: 180px;
    gap: 3px;
}

.course-student-progress__identity span,
.course-student-progress__bar span,
.course-student-progress__no-link,
.course-student-overview__empty span {
    color: var(--color-muted);
    font-size: 12px;
}

.course-student-progress__bar {
    display: grid;
    min-width: 280px;
    flex: 1 1 420px;
    gap: 8px;
}

.course-student-progress__bar progress {
    width: 100%;
    accent-color: var(--color-accent);
}

.course-student-progress > a {
    flex: 0 0 auto;
    font-size: 13px;
    font-weight: 800;
    text-decoration: none;
}

.course-student-overview__empty {
    display: grid;
    gap: 4px;
    padding: 18px;
    border-radius: 12px;
    background: var(--color-surface);
    text-align: center;
}

.course-complete {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 9px 14px;
    border: 1px solid var(--color-success-border);
    border-radius: 8px;
    background-color: var(--color-success-background);
    color: var(--color-success);
    font-weight: 700;
    text-decoration: none;
}

.course-complete:hover {
    border-color: var(--color-success);
    background-color: var(--color-success-background);
    color: var(--color-success);
}

.course-dashboard-card__action {
    justify-content: center;
    width: 100%;
    box-sizing: border-box;
}

.course-module-list {
    display: grid;
    gap: 20px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.course-module {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background-color: var(--color-surface);
}

.course-module__heading {
    display: grid;
    gap: 5px;
    padding: 20px 22px;
    border-bottom: 1px solid var(--color-accent-border);
    background-color: var(--color-accent-light);
}

.course-module__position {
    color: var(--color-accent-active);
    font-family: "JetBrains Mono", monospace;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.course-module__heading h3 {
    margin: 0;
    font-size: 20px;
    line-height: 1.35;
}

.course-module > .course-task-list {
    padding: 16px;
}

.course-module__empty {
    padding: 22px;
    background-color: var(--color-surface-secondary);
}

.course-module__empty strong {
    color: var(--color-text-secondary);
}

.course-module__empty p {
    margin: 6px 0 0;
    color: var(--color-muted);
    font-size: 14px;
}

.course-module--locked {
    border-style: dashed;
}

.course-module--locked .course-module__heading {
    border-bottom-color: var(--color-border);
    background: var(--color-surface-secondary);
}

.course-module--locked .course-module__position,
.course-module--locked .course-module__heading h3 {
    color: var(--color-muted);
}

.course-module__locked {
    padding: 22px;
    background: var(--color-surface-secondary);
}

.course-module__locked p {
    margin: 6px 0 0;
    color: var(--color-muted);
}

.course-module__theory {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 22px;
    border-bottom: 1px solid var(--color-border);
}

.course-module__theory p {
    max-width: 720px;
    margin: 8px 0 0;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.course-module__theory form,
.course-module__theory form button {
    flex: 0 0 auto;
}

.course-theory-complete {
    flex: 0 0 auto;
    padding: 8px 11px;
    border: 1px solid var(--color-success-border);
    border-radius: 8px;
    background: var(--color-success-background);
    color: var(--color-success);
    font-size: 13px;
    font-weight: 800;
}

.course-module__practice-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px 0;
}

.course-module__practice-heading strong {
    color: var(--color-muted);
    font-size: 13px;
}

.course-subtype-list {
    display: grid;
    gap: 12px;
    padding: 16px;
}

.course-subtype {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-surface-secondary);
}

.course-subtype summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px 18px;
    cursor: pointer;
    list-style: none;
}

.course-subtype summary::-webkit-details-marker {
    display: none;
}

.course-subtype summary > span:first-child {
    display: grid;
    gap: 4px;
}

.course-subtype summary small {
    color: var(--color-accent-active);
    font-family: "JetBrains Mono", monospace;
    font-weight: 700;
}

.course-subtype__progress {
    flex: 0 0 auto;
    color: var(--color-muted);
    font-size: 13px;
    font-weight: 800;
}

.course-subtype__actions {
    display: flex;
    justify-content: flex-end;
    padding: 0 16px 12px;
}

.course-subtype .course-task-list {
    padding: 0 12px 12px;
}

.course-module__final {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 22px;
    border-top: 1px solid var(--color-accent-border);
    background: var(--color-accent-light);
}

.course-module__final h4 {
    margin: 7px 0 4px;
    font-size: 18px;
}

.course-module__final p {
    margin: 0;
    color: var(--color-text-secondary);
}

.course-module__final small,
.course-final-result {
    display: block;
    margin-top: 8px;
}

.course-final-result--passed {
    color: var(--color-success);
}

.course-module__final form,
.course-module__final form button,
.course-module__final > .course-button {
    flex: 0 0 auto;
}

.course-module--completed {
    border-color: var(--color-success-border);
}

.course-module__complete-label {
    display: inline-flex;
    width: fit-content;
    margin-top: 8px;
    padding: 5px 9px;
    border-radius: 999px;
    background: var(--color-success-background);
    color: var(--color-success);
    font-size: 12px;
    font-weight: 800;
}

.course-task-list {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.course-task {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
    padding: 18px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background-color: var(--color-surface);
    transition:
        border-color 0.2s ease,
        background-color 0.2s ease;
}

.course-task:hover {
    border-color: var(--color-accent-border);
    background-color: var(--color-accent-light);
}

.course-task--solved {
    border-color: var(--color-success-border);
    background-color: var(--color-success-background);
}

.course-task--solved:hover {
    border-color: var(--color-success);
    background-color: var(--color-success-background);
}

.course-task__position {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background-color: var(--color-accent-light);
    color: var(--color-accent-active);
    font-family: "JetBrains Mono", monospace;
    font-weight: 700;
}

.course-task--solved .course-task__position {
    background-color: var(--color-success);
    color: var(--color-on-status);
}

.course-task__meta {
    color: var(--color-muted);
    font-size: 13px;
}

.course-task h3 {
    margin: 3px 0 0;
    font-size: 17px;
}

.course-task__status {
    display: inline-flex;
    margin-top: 6px;
    color: var(--color-success);
    font-size: 12px;
    font-weight: 700;
}

.course-task__link {
    font-weight: 700;
    text-decoration: none;
}

.course-join {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
    gap: 36px;
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    background-color: var(--color-background-alt);
}

.course-join__content p {
    margin-bottom: 0;
    color: var(--color-muted);
}

.course-join__form {
    padding: 22px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background-color: var(--color-surface);
}

.course-join__form input {
    max-width: none;
}

.course-join__form .errorlist {
    margin: 0 0 8px;
    padding: 0;
    color: var(--color-error);
    font-size: 14px;
    list-style: none;
}

.course-join__form button {
    width: 100%;
}

.course-join__actions {
    display: flex;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 14px;
}

.course-text-link {
    font-weight: 600;
}

.course-dashboard-section {
    margin: 0 48px 40px;
}

.course-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.course-dashboard-card {
    min-height: 0;
}

.course-role {
    display: inline-flex;
    padding: 5px 9px;
    border: 1px solid var(--color-accent-border);
    border-radius: 999px;
    background-color: var(--color-accent-light);
    color: var(--color-accent-active);
    font-size: 12px;
    font-weight: 700;
}

.course-card__badges .course-role {
    margin-left: auto;
}

.course-progress {
    margin: 20px 0;
    padding: 16px;
    border-radius: 10px;
    background-color: var(--color-surface-secondary);
}

.course-progress__heading {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 10px;
    font-size: 14px;
}

.course-progress progress {
    display: block;
    width: 100%;
    height: 8px;
    overflow: hidden;
    border: 0;
    border-radius: 999px;
    background-color: var(--color-accent-light-secondary);
    appearance: none;
}

.course-progress progress::-webkit-progress-bar {
    border-radius: 999px;
    background-color: var(--color-accent-light-secondary);
}

.course-progress progress::-webkit-progress-value {
    border-radius: 999px;
    background-color: var(--color-accent);
}

.course-progress progress::-moz-progress-bar {
    border-radius: 999px;
    background-color: var(--color-accent);
}

.course-progress--complete progress::-webkit-progress-value {
    background-color: var(--color-success);
}

.course-progress--complete progress::-moz-progress-bar {
    background-color: var(--color-success);
}

.course-progress__caption {
    display: block;
    margin-top: 9px;
    color: var(--color-text-secondary);
    font-size: 12px;
}

.course-management-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 20px 0;
}

.course-management-stats span {
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 9px;
    background-color: var(--color-surface-secondary);
    color: var(--color-text-secondary);
    font-size: 13px;
}

.course-management-stats strong {
    display: block;
    margin-top: 3px;
    color: var(--color-text);
    font-family: "JetBrains Mono", monospace;
    font-size: 18px;
}

@media (max-width: 800px) {
    .course-student-progress {
        align-items: stretch;
        flex-direction: column;
    }

    .course-student-progress__bar {
        min-width: 0;
        flex-basis: auto;
    }

    .course-heading {
        padding: 36px 28px 24px;
    }

    .course-grid {
        grid-template-columns: 1fr;
        padding: 0 28px 36px;
    }

    .course-empty {
        margin: 0 28px 36px;
    }

    .course-back {
        margin-right: 28px;
        margin-left: 28px;
    }

    .course-hero,
    .course-content,
    .course-join {
        margin-right: 28px;
        margin-left: 28px;
    }

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

    .course-dashboard-section {
        margin-right: 28px;
        margin-left: 28px;
    }

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

@media (max-width: 600px) {
    .course-page {
        padding: 0;
    }

    .course-heading {
        padding: 28px 18px 20px;
    }

    .course-tabs {
        width: 100%;
        box-sizing: border-box;
    }

    .course-tabs a {
        flex: 1;
        text-align: center;
    }

    .course-grid {
        padding: 0 18px 28px;
    }

    .course-card {
        min-height: 0;
        padding: 20px;
    }

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

    .course-program-summary {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .course-program-summary__actions,
    .course-program-summary__actions .course-button,
    .course-complete {
        width: 100%;
    }

    .course-complete {
        box-sizing: border-box;
        justify-content: center;
    }

    .course-empty {
        margin: 0 18px 28px;
    }

    .course-back {
        margin: 20px 18px 0;
    }

    .course-hero,
    .course-content,
    .course-join,
    .course-dashboard-section {
        margin-right: 18px;
        margin-left: 18px;
    }

    .course-hero {
        padding: 24px 20px;
    }

    .course-module__heading {
        padding: 18px;
    }

    .course-module__heading h3 {
        font-size: 18px;
    }

    .course-module > .course-task-list {
        padding: 12px;
    }

    .course-module__theory {
        align-items: stretch;
        flex-direction: column;
    }

    .course-module__theory form button,
    .course-theory-complete {
        width: 100%;
        box-sizing: border-box;
        justify-content: center;
        text-align: center;
    }

    .course-module__empty {
        padding: 18px;
    }

    .course-subtype summary {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .course-subtype__actions .course-task__link {
        width: 100%;
        box-sizing: border-box;
        text-align: center;
    }

    .course-module__final {
        align-items: stretch;
        flex-direction: column;
    }

    .course-module__final form button,
    .course-module__final > .course-button {
        width: 100%;
        box-sizing: border-box;
        justify-content: center;
        text-align: center;
    }

    .course-join {
        gap: 24px;
        padding: 24px 20px;
    }

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

    .course-task__link {
        grid-column: 2;
    }

    .course-card__badges .course-role {
        margin-left: 0;
    }
}