:root {
    --bundle-primary: #6844c6;
    --bundle-primary-dark: #4c309c;
    --bundle-primary-soft: #f1edfa;
    --bundle-accent: var(--bundle-primary);
    --bundle-accent-dark: var(--bundle-primary-dark);
    --bundle-ink: #242630;
    --bundle-muted: #616571;
    --bundle-faint: #8c92a0;
    --bundle-line: #e0e2e8;
    --bundle-line-soft: #f0f2f6;
    --bundle-paper: #ffffff;
    --bundle-soft: #f6f7f9;
    --bundle-focus: #b9a4ef;
    --bundle-radius-lg: 12px;
    --bundle-radius-md: 8px;
    --bundle-radius-sm: 6px;
    --bundle-shadow-sm: 0 1px 3px rgba(36, 38, 48, 0.04), 0 2px 6px rgba(36, 38, 48, 0.02);
    --bundle-shadow-md: 0 4px 16px rgba(36, 38, 48, 0.06);
    --bundle-shadow-hover: 0 8px 24px rgba(104, 68, 198, 0.12);
}

/* Page Container */
.lesson-bundle-page {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 16px 0 80px;
    color: var(--bundle-ink);
    font-size: 15px;
    line-height: 1.5;
}

.lesson-bundle-page *,
.lesson-bundle-page *::before,
.lesson-bundle-page *::after {
    box-sizing: border-box;
}

/* Topbar & Back Link */
.lesson-bundle-topbar {
    margin-bottom: 14px;
}

.lesson-bundle-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 38px;
    padding: 6px 12px;
    border-radius: var(--bundle-radius-md);
    color: var(--bundle-muted);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: background 140ms ease, color 140ms ease;
}

.lesson-bundle-back:hover {
    color: var(--bundle-primary-dark);
    background: var(--bundle-primary-soft);
}

/* Catalog: Intro Section */
.lesson-bundle-intro {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 32px;
    padding: 24px 28px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-lg);
    background: var(--bundle-paper);
    box-shadow: var(--bundle-shadow-sm);
}

.lesson-bundle-intro__title h1 {
    margin: 0;
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.lesson-bundle-intro__desc {
    margin: 6px 0 0;
    color: var(--bundle-muted);
    font-size: 14px;
}

.lesson-bundle-semesters {
    display: inline-flex;
    gap: 4px;
    padding: 4px;
    border: 1px solid var(--bundle-line);
    border-radius: 10px;
    background: var(--bundle-soft);
}

.lesson-bundle-semester {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 18px;
    border-radius: 7px;
    color: var(--bundle-muted);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 140ms ease;
}

.lesson-bundle-semester:hover {
    color: var(--bundle-ink);
}

.lesson-bundle-semester.is-active {
    color: var(--bundle-primary-dark);
    background: #ffffff;
    box-shadow: 0 2px 6px rgba(36, 38, 48, 0.08);
}

/* Catalog: Unit Groups */
.lesson-bundle-unit + .lesson-bundle-unit {
    margin-top: 40px;
}

.lesson-bundle-unit__head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.lesson-bundle-unit__badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    border-radius: var(--bundle-radius-sm);
    background: var(--bundle-primary-soft);
    color: var(--bundle-primary-dark);
    font-size: 12px;
    font-weight: 700;
}

.lesson-bundle-unit > h2,
.lesson-bundle-unit__head h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* Catalog: Card Grid */
.lesson-bundle-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.lesson-bundle-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-lg);
    background: var(--bundle-paper);
    box-shadow: var(--bundle-shadow-sm);
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.lesson-bundle-card:hover {
    transform: translateY(-2px);
    border-color: var(--bundle-focus);
    box-shadow: var(--bundle-shadow-hover);
}

.lesson-bundle-card__media,
.lesson-bundle-card > img {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bundle-soft);
}

.lesson-bundle-card img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lesson-bundle-card__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 16px;
    gap: 6px;
}

.lesson-bundle-eyebrow,
.lesson-bundle-step,
.lesson-bundle-card__meta,
.lesson-bundle-delivery__label {
    margin: 0;
    color: var(--bundle-primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.lesson-bundle-card h3 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.4;
    word-break: keep-all;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}

.lesson-bundle-card__summary {
    margin: 4px 0 0;
    color: var(--bundle-muted);
    font-size: 14px;
    line-height: 1.5;
    word-break: keep-all;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}

.lesson-bundle-card__bottom {
    display: flex;
    flex-direction: column;
    margin-top: auto;
    padding-top: 14px;
}

.lesson-bundle-card__alignment {
    margin: 0 0 10px;
    color: var(--bundle-muted);
    font-size: 13px;
    font-weight: 600;
}

.lesson-bundle-card__action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 42px;
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-primary-soft);
    color: var(--bundle-primary-dark);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: all 140ms ease;
}

.lesson-bundle-card__action:hover {
    background: var(--bundle-primary);
    color: #ffffff;
}

/* Detail: Hero Header */
.lesson-bundle-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 28px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-lg);
    background: var(--bundle-paper);
    box-shadow: var(--bundle-shadow-sm);
}

.lesson-bundle-hero--with-video {
    grid-template-columns: minmax(0, 1fr) 210px;
    align-items: start;
}

.lesson-bundle-hero__main h1 {
    margin: 4px 0 0;
    font-size: clamp(1.6rem, 3.2vw, 2.2rem);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
    word-break: keep-all;
}

.lesson-bundle-purpose {
    max-width: 680px;
    margin: 10px 0 0;
    color: #4b5563;
    font-size: 15px;
    line-height: 1.6;
    word-break: keep-all;
}

.lesson-bundle-hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    margin: 14px 0 0;
    color: var(--bundle-muted);
    font-size: 14px;
    font-weight: 600;
}

.lesson-bundle-hero__meta span {
    white-space: nowrap;
}

.lesson-bundle-hero__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-top: 22px;
}

.lesson-bundle-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 0 24px;
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-primary);
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(104, 68, 198, 0.25);
    transition: all 140ms ease;
}

.lesson-bundle-primary:hover {
    background: var(--bundle-primary-dark);
    box-shadow: 0 6px 18px rgba(104, 68, 198, 0.35);
    transform: translateY(-1px);
}

.lesson-bundle-primary__arrow {
    font-size: 16px;
    transition: transform 140ms ease;
}

.lesson-bundle-primary:hover .lesson-bundle-primary__arrow {
    transform: translate(2px, -2px);
}


/* Hero: Shortform Video Preview */
.lesson-bundle-hero__video {
    display: flex;
    flex-direction: column;
    padding: 12px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-soft);
}

.lesson-bundle-hero__video-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.lesson-bundle-hero__video h2,
.lesson-bundle-hero__video-header h2 {
    margin: 0;
    font-size: 13px;
    font-weight: 700;
    color: var(--bundle-ink);
}

.lesson-bundle-badge {
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--bundle-primary-soft);
    color: var(--bundle-primary-dark);
    font-size: 11px;
    font-weight: 700;
}

.lesson-bundle-hero__video-player {
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: var(--bundle-radius-sm);
    background: #000000;
    overflow: hidden;
}

.lesson-bundle-hero__video-player video,
.lesson-bundle-hero__video video {
    display: block;
    width: 100%;
    aspect-ratio: 9 / 16;
    border-radius: var(--bundle-radius-sm);
    background: #000000;
    object-fit: cover;
}

.lesson-bundle-hero__video-fullscreen {
    display: inline-flex;
    min-height: 44px;
    margin-top: 10px;
    padding: 0 14px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--bundle-primary);
    border-radius: var(--bundle-radius-sm);
    color: var(--bundle-primary-dark);
    background: #fff;
    font-size: 13px;
    font-weight: 800;
    text-decoration: none;
}

.lesson-bundle-hero__video-fullscreen:hover {
    background: var(--bundle-primary-soft);
}

.lesson-bundle-hero__video-player video:fullscreen,
.lesson-bundle-hero__video-player video:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    max-width: none;
    max-height: none;
    aspect-ratio: auto;
    border-radius: 0;
    object-fit: contain;
}

/* Detail: 2-Column Body Layout */
.lesson-bundle-body-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(320px, 1fr);
    gap: 24px;
    margin-top: 24px;
    align-items: start;
}

.lesson-bundle-body-main,
.lesson-bundle-body-side {
    display: grid;
    gap: 24px;
}

/* Sections */
.lesson-bundle-section {
    padding: 24px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-lg);
    background: var(--bundle-paper);
    box-shadow: var(--bundle-shadow-sm);
}

.lesson-bundle-section__heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.lesson-bundle-section__heading h2 {
    margin: 2px 0 0;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.lesson-bundle-section__sub,
.lesson-bundle-section__heading > p {
    margin: 0;
    color: var(--bundle-muted);
    font-size: 13px;
    text-align: right;
}

.lesson-bundle-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 6px 14px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-soft);
    color: var(--bundle-ink);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: background 140ms ease;
}

.lesson-bundle-secondary:hover {
    background: var(--bundle-line-soft);
}

.lesson-bundle-text-button {
    min-height: 36px;
    padding: 6px 12px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: #ffffff;
    color: var(--bundle-ink);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 140ms ease;
}

.lesson-bundle-text-button:hover {
    background: var(--bundle-soft);
    border-color: var(--bundle-focus);
}

/* Worksheet Preview Box */
.lesson-bundle-worksheet {
    margin-top: 12px;
}

.lesson-bundle-worksheet summary,
.lesson-bundle-optional summary {
    font-size: 14px;
    font-weight: 600;
    color: var(--bundle-primary);
    cursor: pointer;
    user-select: none;
}

.lesson-bundle-worksheet__preview-box {
    margin-top: 12px;
    max-height: 440px;
    overflow-y: auto;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-soft);
    padding: 10px;
}

.lesson-bundle-worksheet img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--bundle-radius-sm);
}

/* Guide Items */
.lesson-bundle-guide {
    display: grid;
    gap: 8px;
    margin-top: 14px;
}

.lesson-bundle-guide__item {
    overflow: hidden;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: #ffffff;
    transition: border-color 140ms ease;
}

.lesson-bundle-guide__item[open] {
    border-color: var(--bundle-focus);
}

.lesson-bundle-guide__item summary {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 52px;
    padding: 12px 16px;
    cursor: pointer;
    list-style: none;
    font-weight: 600;
    color: var(--bundle-ink);
}

.lesson-bundle-guide__item summary::-webkit-details-marker {
    display: none;
}

.lesson-bundle-guide__item summary::after {
    content: "+";
    margin-left: auto;
    color: var(--bundle-muted);
    font-size: 1.25rem;
    font-weight: 400;
}

.lesson-bundle-guide__item[open] summary::after {
    content: "−";
    color: var(--bundle-primary);
}

.lesson-bundle-guide__phase {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 26px;
    padding: 0 8px;
    border-radius: 6px;
    background: var(--bundle-primary);
    color: #ffffff;
    font-size: 12px;
    font-weight: 700;
}

.lesson-bundle-guide__title {
    font-size: 15px;
}

.lesson-bundle-guide__content p,
.lesson-bundle-guide__item p {
    margin: 0;
    padding: 0 16px 16px 72px;
    color: var(--bundle-muted);
    font-size: 14px;
    line-height: 1.65;
    word-break: keep-all;
}

/* Optional Activity */
.lesson-bundle-optional {
    margin-top: 14px;
    padding: 14px 16px;
    border: 1px dashed var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-soft);
}

.lesson-bundle-optional > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 10px;
}

.lesson-bundle-optional p {
    margin: 0;
    color: var(--bundle-muted);
    font-size: 14px;
}

.lesson-bundle-text-link {
    color: var(--bundle-primary-dark);
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
}

.lesson-bundle-text-link:hover {
    text-decoration: underline;
}

/* Student Deliveries */
.lesson-bundle-deliveries {
    display: grid;
    gap: 10px;
    margin-top: 14px;
}

.lesson-bundle-delivery {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: #ffffff;
    color: var(--bundle-ink);
    text-decoration: none;
    transition: all 140ms ease;
}

.lesson-bundle-delivery:hover {
    border-color: var(--bundle-focus);
    background: var(--bundle-primary-soft);
    transform: translateY(-1px);
}

.lesson-bundle-delivery__icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: var(--bundle-radius-sm);
    background: var(--bundle-primary-soft);
    color: var(--bundle-primary);
    font-size: 13px;
    font-weight: 800;
}

.lesson-bundle-delivery__content {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 2px;
}

.lesson-bundle-delivery strong {
    font-size: 15px;
    font-weight: 700;
}

.lesson-bundle-delivery__hint,
.lesson-bundle-delivery strong + span {
    color: var(--bundle-muted);
    font-size: 13px;
}

.lesson-bundle-delivery__arrow {
    color: var(--bundle-primary);
    font-size: 16px;
    font-weight: 700;
    transition: transform 140ms ease;
}

.lesson-bundle-delivery:hover .lesson-bundle-delivery__arrow {
    transform: translateX(3px);
}

/* Dialog: QR & Delivery */
.lesson-bundle-dialog {
    width: min(480px, calc(100% - 24px));
    max-width: none;
    max-height: calc(100dvh - 24px);
    padding: 0;
    border: 0;
    border-radius: 16px;
    color: var(--bundle-ink);
    background: transparent;
}

.lesson-bundle-dialog::backdrop {
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(4px);
}

.lesson-bundle-dialog[open] {
    animation: lesson-bundle-dialog-in 160ms ease-out;
}

.lesson-bundle-dialog__panel {
    position: relative;
    max-height: calc(100dvh - 24px);
    padding: 28px 24px;
    overflow-y: auto;
    border: 1px solid var(--bundle-line);
    border-radius: 16px;
    background: #ffffff;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
    text-align: center;
}

.lesson-bundle-dialog__close {
    position: absolute;
    top: 14px;
    right: 14px;
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 50%;
    color: var(--bundle-muted);
    background: var(--bundle-soft);
    cursor: pointer;
    font-size: 1.3rem;
    line-height: 1;
    transition: background 140ms ease;
}

.lesson-bundle-dialog__close:hover {
    background: var(--bundle-line-soft);
    color: var(--bundle-ink);
}

.lesson-bundle-dialog h2 {
    margin: 2px 0 0;
    font-size: 1.45rem;
    font-weight: 700;
}

.lesson-bundle-dialog__description {
    margin: 6px 0 16px;
    color: var(--bundle-muted);
    font-size: 14px;
}

.lesson-bundle-dialog__qr {
    display: block;
    width: min(240px, 68vw);
    height: auto;
    margin: 0 auto;
    padding: 12px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: #ffffff;
    image-rendering: pixelated;
}

.lesson-bundle-dialog.is-projector {
    width: min(680px, calc(100% - 20px));
}

.lesson-bundle-dialog.is-projector .lesson-bundle-dialog__qr {
    width: min(440px, 80vw, 60vh);
}

.lesson-bundle-dialog__hint {
    margin: 12px 0 0;
    color: var(--bundle-muted);
    font-size: 13px;
}

.lesson-bundle-dialog__status {
    min-height: 1.4em;
    margin: 6px 0 0;
    color: #15803d;
    font-size: 13px;
    font-weight: 600;
}

.lesson-bundle-dialog__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 14px;
}

.lesson-bundle-dialog__actions a,
.lesson-bundle-dialog__actions button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 8px 16px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    color: var(--bundle-ink);
    background: #ffffff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 140ms ease;
}

.lesson-bundle-dialog__actions a:hover,
.lesson-bundle-dialog__actions button:hover {
    background: var(--bundle-soft);
}

.lesson-bundle-dialog__actions .lesson-bundle-dialog__primary {
    border-color: var(--bundle-primary);
    color: #ffffff;
    background: var(--bundle-primary);
}

.lesson-bundle-dialog__actions .lesson-bundle-dialog__primary:hover {
    background: var(--bundle-primary-dark);
}

/* Noscript Fallback */
.lesson-bundle-noscript {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.lesson-bundle-noscript article {
    display: grid;
    justify-items: center;
    gap: 8px;
    padding: 16px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-soft);
}

.lesson-bundle-noscript h3 {
    margin: 0;
    font-size: 14px;
}

.lesson-bundle-noscript img {
    display: block;
    width: 200px;
    height: auto;
    padding: 6px;
    background: #ffffff;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-sm);
}

.lesson-bundle-noscript a {
    color: var(--bundle-primary);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
}

/* Empty State */
.lesson-bundle-empty {
    padding: 60px 24px;
    border: 1px dashed var(--bundle-line);
    border-radius: var(--bundle-radius-lg);
    text-align: center;
    background: var(--bundle-paper);
}

.lesson-bundle-empty h2 {
    margin: 0;
    font-size: 1.25rem;
}

.lesson-bundle-empty p {
    margin: 8px 0 0;
    color: var(--bundle-muted);
}

/* Accessibility & Animation */
.lesson-bundle-page a:focus-visible,
.lesson-bundle-page button:focus-visible,
.lesson-bundle-page summary:focus-visible,
.lesson-bundle-dialog a:focus-visible,
.lesson-bundle-dialog button:focus-visible {
    outline: 3px solid var(--bundle-focus);
    outline-offset: 2px;
}

@keyframes lesson-bundle-dialog-in {
    from { opacity: 0; transform: translateY(6px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Lesson discovery, preparation, and resource details */
.lesson-bundle-intro__scope {
    margin: 7px 0 0;
    color: var(--bundle-muted);
    line-height: 1.5;
}

.lesson-bundle-search {
    width: min(960px, 100%);
    margin: 0 auto 28px;
    padding: 20px 22px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-lg);
    background: var(--bundle-paper);
    box-shadow: var(--bundle-shadow-sm);
}

.lesson-bundle-search__main > label,
.lesson-bundle-search__filters label {
    display: block;
    color: var(--bundle-ink);
    font-size: 14px;
    font-weight: 700;
}

.lesson-bundle-search__entry {
    display: flex;
    gap: 9px;
    margin-top: 8px;
}

.lesson-bundle-search input[type="search"],
.lesson-bundle-search select {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    padding: 9px 12px;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    color: var(--bundle-ink);
    background: var(--bundle-paper);
    font: inherit;
}

.lesson-bundle-search__entry button {
    flex: 0 0 auto;
    min-width: 74px;
    border: 0;
    border-radius: var(--bundle-radius-md);
    color: #fff;
    background: var(--bundle-primary);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.lesson-bundle-semesters {
    margin-top: 14px;
}

.lesson-bundle-semester {
    cursor: pointer;
}

.lesson-bundle-semester input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
}

.lesson-bundle-semester:has(input:focus-visible) {
    outline: 3px solid var(--bundle-focus);
    outline-offset: 3px;
}

.lesson-bundle-search__more {
    margin-top: 14px;
}

.lesson-bundle-search__more summary {
    width: max-content;
    color: var(--bundle-primary-dark);
    font-weight: 700;
    cursor: pointer;
}

.lesson-bundle-search__filters {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 14px;
}

.lesson-bundle-search__filters select {
    display: block;
    margin-top: 5px;
}

.lesson-bundle-search__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 14px;
    color: var(--bundle-muted);
    font-size: 14px;
}

.lesson-bundle-search__footer p {
    margin: 0;
    font-weight: 700;
}

.lesson-bundle-search__footer a,
.lesson-bundle-card__preview summary {
    color: var(--bundle-primary-dark);
    font-weight: 700;
}

.lesson-bundle-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 8px;
}

.lesson-bundle-card__tags span {
    padding: 4px 8px;
    border-radius: 999px;
    color: var(--bundle-primary-dark);
    background: var(--bundle-primary-soft);
    font-size: 12px;
    font-weight: 700;
}

.lesson-bundle-card__preview {
    margin-top: 8px;
}

.lesson-bundle-card__preview summary {
    width: max-content;
    cursor: pointer;
}

.lesson-bundle-card__preview img {
    width: min(100%, 240px);
    height: auto;
    margin: 10px auto 0;
    border: 1px solid var(--bundle-line);
    border-radius: var(--bundle-radius-md);
    object-fit: contain;
}

.lesson-bundle-prep__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 18px 0 0;
}

.lesson-bundle-prep__grid > div {
    padding: 14px 16px;
    border-radius: var(--bundle-radius-md);
    background: var(--bundle-soft);
}

.lesson-bundle-prep__grid dt {
    color: var(--bundle-muted);
    font-size: 13px;
    font-weight: 700;
}

.lesson-bundle-prep__grid dd {
    margin: 5px 0 0;
    line-height: 1.55;
    font-weight: 600;
    word-break: keep-all;
}

.lesson-bundle-prep__wide {
    grid-column: 1 / -1;
}

.lesson-bundle-guide__minutes,
.lesson-bundle-delivery__condition {
    color: var(--bundle-muted);
    font-size: 12px;
    font-weight: 600;
}

/* Responsive Media Queries */
@media (max-width: 960px) {
    .lesson-bundle-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lesson-bundle-search__filters {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lesson-bundle-body-grid {
        grid-template-columns: 1fr;
    }

    .lesson-bundle-hero--with-video {
        grid-template-columns: 1fr;
    }

    .lesson-bundle-hero__video {
        max-width: 220px;
    }
}

@media (max-width: 640px) {
    .lesson-bundle-page {
        width: min(calc(100% - 20px), 1180px);
        padding-top: 10px;
    }

    .lesson-bundle-intro {
        padding: 16px;
        gap: 14px;
    }

    .lesson-bundle-semesters {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .lesson-bundle-semester {
        padding-inline: 6px;
    }

    .lesson-bundle-grid {
        grid-template-columns: 1fr;
    }

    .lesson-bundle-search {
        padding: 16px;
    }

    .lesson-bundle-search__filters,
    .lesson-bundle-prep__grid {
        grid-template-columns: 1fr;
    }

    .lesson-bundle-prep__wide {
        grid-column: auto;
    }

    .lesson-bundle-hero {
        padding: 20px 18px;
    }

    .lesson-bundle-hero__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .lesson-bundle-primary {
        width: 100%;
    }

    .lesson-bundle-hero__video {
        max-width: 100%;
    }

    .lesson-bundle-hero__video-player {
        width: min(100%, 180px);
        aspect-ratio: 9 / 16;
        max-height: 320px;
        margin: 0 auto;
    }

    .lesson-bundle-hero__video-player video,
    .lesson-bundle-hero__video video {
        width: 100%;
        height: 100%;
        aspect-ratio: 9 / 16;
        max-height: 320px;
        object-fit: cover;
    }

    .lesson-bundle-section {
        padding: 18px 16px;
    }

    .lesson-bundle-section__heading {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .lesson-bundle-section__sub,
    .lesson-bundle-section__heading > p {
        text-align: left;
    }

    .lesson-bundle-guide__item summary {
        padding: 12px;
        gap: 8px;
    }

    .lesson-bundle-guide__content p,
    .lesson-bundle-guide__item p {
        padding: 0 12px 14px;
    }

    .lesson-bundle-dialog__panel {
        padding: 22px 16px 16px;
    }

    .lesson-bundle-dialog__actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lesson-bundle-dialog__actions .lesson-bundle-dialog__primary {
        grid-column: 1 / -1;
    }
}

@media (prefers-reduced-motion: reduce) {
    .lesson-bundle-card,
    .lesson-bundle-dialog[open] {
        animation: none;
        transition: none;
    }
}