/* Scoped to the course detail page; shared purchase and CMS styles remain intact. */
.course-detail {
    --course-ink: #1b2733;
    --course-muted: #616a73;
    --course-rule: #e7e3df;
    /* 頁面容器已是 catalog rail（front.css 已扣過 gutter 與 1520 上限），
       這裡填滿即可與 header 同寬；不可再加左右 padding（會比 header 窄一圈）。 */
    width: 100%;
    max-width: none;
    margin: 0 auto;
    padding: 24px 0 100px;
    color: var(--course-ink);
}

.course-hero {
    display: grid;
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
    padding-block: 12px 44px;
}

.course-eyebrow { display: flex; align-items: center; min-block-size: 38px; margin-bottom: 18px; }
.course-eyebrow::before { flex: 0 0 4px; align-self: stretch; min-block-size: 36px; margin-inline-end: 12px; border-radius: 999px; background: #ff762e; content: ""; }
.course-detail .course-categories { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.course-detail .course-categories a {
    margin: 0;
    padding: 7px 12px;
    border-radius: 6px;
    color: #b74310;
    background: #fff1e7;
    font-size: .875rem;
}

.course-hero h1 {
    margin: 0;
    max-inline-size: 100%;
    font-size: clamp(2.15rem, 3.7vw, 3.55rem);
    line-height: 1.16;
    font-weight: 780;
    letter-spacing: -.03em;
    overflow-wrap: break-word;
    word-break: normal;
    hyphens: none;
    text-wrap: balance;
}

.course-facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
    max-inline-size: 540px;
    margin: 28px 0 0;
    padding-top: 24px;
    border-top: 1px solid var(--course-rule);
}

.course-facts dt { color: var(--course-muted); font-size: .8125rem; font-weight: 400; }
.course-facts dt i { margin-right: 4px; color: #007aff; }
.course-facts dd { margin: 6px 0 0; font-size: 1.25rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.course-facts dd span { font-size: .875rem; font-weight: 400; }
.course-hero-media { position: relative; isolation: isolate; margin-block-start: 54px; padding: 8px; background: #fff; border: 1px solid var(--course-rule); border-radius: 20px; box-shadow: 0 16px 40px #1b27330a; }
.course-hero-media::before,
.course-hero-media::after { position: absolute; z-index: -1; block-size: 6px; border-radius: 999px; content: ""; }
.course-hero-media::before { inset: -8px auto auto 36px; inline-size: 36%; background: #ff762e; }
.course-hero-media::after { inset: auto 24px -8px auto; inline-size: 24%; background: #349dff; }
.course-hero-media img { display: block; width: 100%; height: auto; aspect-ratio: 2 / 1; object-fit: contain; border-radius: 10px; }

.course-section-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    padding-block: 16px;
    border-block: 1px solid var(--course-rule);
    margin-bottom: 36px;
}
.course-section-nav a { display: inline-flex; align-items: center; justify-content: flex-start; gap: 8px; min-height: 32px; padding: 8px 12px; border-bottom: 3px solid transparent; color: var(--course-ink); font-size: .9375rem; font-weight: 600; text-decoration: none; transition: border-color .18s ease, color .18s ease; }
.course-section-nav i { color: #007aff; }
.course-section-nav a:hover { border-bottom-color: #ff762e; color: #c1440e; }
.course-detail :is(a, button):focus-visible { outline: 3px solid #007aff; outline-offset: 4px; }
.course-detail :is(#topics, #course-description, #course-student-message) { scroll-margin-top: 120px; }

.course-detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; align-items: start; gap: 48px; }
.course-detail-content { min-width: 0; }
.course-purchase { align-self: stretch; min-width: 0; }
.course-detail #topics { margin-top: 0 !important; }
.course-detail #topics > .description > .d-flex { gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.course-detail #topics h2 { margin-bottom: 0; color: var(--course-ink); font-size: 1.5rem; }
.course-detail .topic-block { background: #fff; border: 1px solid var(--course-rule); border-radius: 12px; margin-bottom: 14px !important; }
/* 分段外框為 1px 框線＋12px 圓角，內層標題用 11px（12 − 1）才會剛好貼齊框線內緣。 */
.course-detail .topic-btn-accordion { height: auto; min-height: 72px; padding: 18px 36px 18px 12px; text-align: left; line-height: 1.65; border-radius: 11px; background: #fff5ef; font-size: .9375rem; }
/* 展開且下方有影片清單時，標題下緣改直角與清單相接，避免圓弧和清單上框線交錯出缺角；
   收合（Bootstrap 加上 .collapsed）或沒有子影片時維持四角圓角。has-accordion 由 CoursePage 腳本加上。 */
.course-detail .topic-btn-accordion.has-accordion:not(.collapsed) { border-end-start-radius: 0; border-end-end-radius: 0; }
.course-detail .topic-btn-accordion > div { gap: 12px; }
.course-detail .topic-btn-accordion::before { padding-inline: 4px 12px; font-size: .5rem; }
.course-detail .topic-btn-accordion:hover { background: #ffeddf; }
.course-detail .topic-video-duration { flex-shrink: 0; color: var(--course-muted); font-size: .8125rem; font-variant-numeric: tabular-nums; }
.course-detail .accordion-body.purchase { padding: 17px 20px; border-top: 1px solid #f0ece8; }
.course-detail .learn { gap: 16px; font-size: .9375rem; line-height: 1.65; }
.course-detail .learn > :first-child { min-width: 0; overflow-wrap: anywhere; }
.course-detail .learn > :last-child { flex-shrink: 0; }
.course-detail .learn .duration { color: var(--course-muted); font-size: .8125rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.course-detail .learn a:hover { color: #0066d6; }
.course-detail .course-description { margin-top: 48px; padding-top: 12px; border-top: 1px solid var(--course-rule); }
.course-detail .to-student-message { margin-top: 36px; }
.course-detail .checkout-sticky { top: 108px; max-height: calc(100dvh - 128px); padding: 0 4px 12px; }
.course-purchase .card-body { padding: 24px; }
.course-purchase .card-text { font-size: .875rem; }
.course-purchase .card-body > .h4 { font-size: 1rem; line-height: 1.8; }
.course-purchase .btn { min-height: 44px; padding-block: 10px; }
.course-purchase .buy { width: 100%; margin-top: 10px; }
.course-detail .course-purchase-banner { width: auto; left: 0; right: 0; margin: 0; gap: 12px; border-top: 1px solid #d9e8f5; box-shadow: 0 -4px 20px #1b273308; padding-bottom: max(1rem, env(safe-area-inset-bottom)) !important; }
.course-detail .course-purchase-banner > .w-100 > :is(h5, hr) { display: none; }
.course-detail .course-purchase-banner { max-height: 45dvh; overflow-y: auto; }

/* Course purchase: editorial offer block followed by a grouped learning-tools rail. */
.course-purchase .course-plan-card {
    position: relative;
    overflow: visible;
    border: 1px solid #e3e7ec;
    border-radius: 22px;
    background: #fffdfa;
    box-shadow: 0 22px 54px #25364b12, 0 2px 8px #25364b08;
}

.course-purchase .course-plan-card::before {
    position: absolute;
    inset: 0 0 auto;
    block-size: 5px;
    border-radius: 22px 22px 0 0;
    background: linear-gradient(90deg, #ff7b31 0 32%, #ffd6bd 32% 64%, #349dff 100%);
    content: "";
}

.course-purchase .course-plan-card .card-body { padding: 27px 22px 22px; }
.course-plan-header { display: grid; gap: 13px; }
.course-plan-kicker-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.course-plan-kicker { display: inline-flex; align-items: center; gap: 7px; color: #b84d1b; font-size: .7rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.course-plan-kicker i { display: grid; place-items: center; inline-size: 25px; block-size: 25px; border: 1px solid #ffe0cf; border-radius: 8px; background: #fff5ef; font-size: .8rem; }
.course-plan-title { position: relative; margin: 0; padding-inline-end: 18px; color: var(--course-ink); font-size: clamp(1.28rem, 2vw, 1.55rem); line-height: 1.3; font-weight: 780; letter-spacing: -.035em; text-wrap: balance; }
.course-plan-title::after { position: absolute; inset: auto 0 .2em auto; inline-size: 8px; block-size: 8px; border-radius: 50%; background: #349dff; content: ""; }
.course-plan-video-count { display: inline-flex; align-items: baseline; gap: 4px; color: var(--course-muted); font-size: .7rem; white-space: nowrap; }
.course-plan-video-count strong { color: #147bd4; font-size: 1rem; font-variant-numeric: tabular-nums; }
.course-plan-divider { block-size: 1px; margin-block: 18px; background: linear-gradient(90deg, #e8edf3, #e8edf300); }
.course-plan-pricing { display: grid; gap: 9px; margin: 0; padding: 16px; border: 1px solid #f0e9e3; border-radius: 14px; background: #fff7f1; color: var(--course-ink); font-size: .875rem !important; line-height: 1.55 !important; }
.course-plan-pricing > .card-text { margin: 0; }
.course-plan-pricing > div.d-flex { display: grid !important; grid-template-columns: minmax(0, 1fr) auto; align-items: baseline; gap: 12px; font-size: .8125rem; }
.course-plan-pricing > div.d-flex > :last-child { text-align: end; font-variant-numeric: tabular-nums; }
.course-plan-pricing .course-price-label { display: inline-flex; align-items: center; min-inline-size: 0; gap: 0; color: #6a7078 !important; white-space: nowrap; }
.course-plan-pricing .course-price-label > :last-child { margin-inline-start: 2px; }
.course-plan-pricing .info-container { display: inline-flex; align-items: center; justify-content: center; inline-size: 1.2rem; block-size: 1.2rem; margin-inline: 3px 1px; }
.course-plan-pricing .info-icon { display: grid; place-items: center; inline-size: 1.05rem; block-size: 1.05rem; margin: 0; color: #187bd7; font-size: .72rem; line-height: 1; vertical-align: middle; }
.course-plan-pricing .info-icon:focus { box-shadow: 0 0 0 3px #187bd733; border-radius: 50%; }
.course-plan-pricing .info-tooltip { width: min(210px, calc(100vw - 48px)); font-size: .75rem; line-height: 1.55; }
.course-plan-pricing .text-primary { color: #0878e8 !important; font-weight: 750 !important; }
.course-plan-pricing .text-decoration-line-through { color: #929ba6 !important; font-weight: 500 !important; }
.course-plan-pricing .countdown-banner { flex-wrap: wrap; margin-top: 8px !important; padding: 8px 10px; border-radius: 8px; background: #fff1e8; color: #a84612; font-size: .75rem; }
.course-plan-pricing > .card-text .text-dark { color: var(--course-muted) !important; font-size: .8rem; font-weight: 500 !important; }
.course-plan-pricing > .card-text > .text-primary { display: block; margin-top: 3px; font-size: 1.65rem; line-height: 1.3; letter-spacing: -.035em; }
.course-plan-pricing .alert { grid-column: 1 / -1; border: 1px solid #dcecff; border-radius: 10px; background: #eff6ff; color: #29496c; }
.course-plan-pricing > .d-flex.justify-content-end { display: block !important; margin-top: 8px !important; }
.course-plan-pricing .buy,
.course-plan-pricing > .d-flex > .btn { display: flex; align-items: center; justify-content: center; width: 100%; min-height: 48px; margin: 0; border: 0; border-radius: 10px; background: #ff762e; color: #fff; font-size: .9375rem; font-weight: 700; box-shadow: 0 5px 12px #ff762e2e; transition: background-color .18s ease, box-shadow .18s ease, transform .18s ease; }
.course-plan-pricing .buy:hover,
.course-plan-pricing > .d-flex > .btn:not(:disabled):hover { transform: translateY(-1px); background: #e9611b; box-shadow: 0 8px 16px #ff762e38; color: #fff; }
.course-plan-pricing .buy:active,
.course-plan-pricing > .d-flex > .btn:not(:disabled):active { transform: translateY(1px) scale(.99); }
.course-plan-pricing > .d-flex > .btn:disabled { width: 100%; }

.course-purchase .checkout-sticky { display: grid; gap: 16px; }
.course-rail-resources { padding: 17px 16px 12px; border: 1px solid #dfe9f4; border-radius: 18px; background: #f7fbff; }
.course-rail-resources__heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; padding: 0 2px 12px; border-bottom: 1px solid #dbe8f4; }
.course-rail-resources__heading h2 { margin: 0; color: var(--course-ink); font-size: .95rem; line-height: 1.2; font-weight: 780; letter-spacing: -.01em; }
.course-rail-resources__heading span { color: #7c9bb8; font-size: .58rem; font-weight: 800; letter-spacing: .13em; }
.course-purchase .course-rail-action { margin: 0 !important; }
.course-purchase .course-rail-action > :is(a, button) {
    position: relative;
    display: flex !important;
    align-items: center;
    justify-content: flex-start !important;
    gap: 12px;
    inline-size: 100%;
    min-block-size: 57px;
    padding: 10px 2px !important;
    border: 0 !important;
    border-bottom: 1px solid #e1ebf4 !important;
    border-radius: 0 !important;
    background: transparent !important;
    color: var(--course-ink) !important;
    box-shadow: none;
    font-size: .875rem;
    font-weight: 650;
    text-align: start;
    text-decoration: none;
    transition: border-color .18s ease, background-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.course-purchase .course-rail-action > :is(a, button)::after { margin-inline-start: auto; color: #8492a2; font-family: bootstrap-icons; font-size: .9rem; content: "\F135"; }
.course-purchase .course-rail-action > :is(a, button):hover { transform: translateX(3px); border-color: #e1ebf4 !important; background: #edf6ff !important; box-shadow: none; }
.course-purchase .course-rail-action > :is(a, button):active { transform: translateY(1px) scale(.99); }
.course-purchase .course-rail-action .download-btn { display: flex; align-items: center; gap: 12px; inline-size: 100%; padding: 0; border-radius: 0; background: transparent; color: inherit; }
.course-purchase .course-rail-action .download-btn-text { display: flex; align-items: center; gap: 12px; margin: 0; padding: 0; color: inherit; font-size: inherit; font-weight: inherit; }
.course-purchase .course-rail-action .download-btn-text img { display: grid; place-items: center; inline-size: 31px; block-size: 31px; padding: 7px; border: 1px solid #ffe1d0; border-radius: 9px; background: #fff5ef; object-fit: contain; }
.course-purchase .course-rail-action--materials .download-btn-text img { border-color: #e96928; background: #ff762e; }
.course-purchase .course-rail-action--discord > a { border-color: #d9e8fb !important; background: #f4f8ff !important; cursor: pointer; }
.course-purchase .course-rail-action--discord .download-btn-text img { border-color: #2586e0; background: #349dff; }
.course-purchase .course-rail-action--custom-fields > button { border-color: #dcecff !important; }
.course-purchase .course-rail-action--custom-fields > button > i { display: grid; place-items: center; inline-size: 31px; block-size: 31px; margin: 0 !important; border: 1px solid #dbeaff; border-radius: 9px; background: #eef6ff; color: #0878e8; }
.course-purchase .course-rail-action--calendar > a > i,
.course-purchase .course-rail-action--extend > button > i { display: grid; place-items: center; inline-size: 31px; block-size: 31px; margin: 0 !important; border-radius: 9px; background: #eef6ff; color: #0878e8; }
.course-purchase .course-rail-action--extend > button > i { background: #fff4e4; color: #bc7010; }

.course-purchase .course-app-card {
    position: relative;
    overflow: visible;
    margin-top: 0;
    border: 1px solid #e7ebf0;
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 12px 30px #25364b0b;
}
.course-purchase .course-app-card::before { inset: 0 18px auto; block-size: 1px; background: #e8edf3; content: ""; }
.course-purchase .course-app-card .card-body { padding: 18px; }
.course-purchase .course-app-card .webapp-card-head { align-items: flex-start; padding: 2px 0 14px; margin: 0 0 8px; border: 0; border-bottom: 1px solid #edf0f3; border-radius: 0; background: none; box-shadow: none; }
.course-purchase .course-app-card .webapp-card-head__title { align-items: flex-start; gap: 11px; }
.course-purchase .course-app-card .webapp-card-head__icon { inline-size: 38px; block-size: 38px; border-radius: 11px; }
.course-purchase .course-app-card .webapp-card-head__text { margin: 0; padding-top: 2px; color: var(--course-ink); font-size: .95rem; font-weight: 700; }
.course-purchase .course-app-card .webapp-card-head__badge { display: grid; place-items: center; min-inline-size: 29px; min-block-size: 29px; padding: 3px 7px; border: 1px solid #dcecff; border-radius: 9px; background: #f1f7ff; color: #0878e8; box-shadow: none; }
.course-purchase .course-app-card .webapp-list { gap: 0; }
.course-purchase .course-app-card .webapp-list li + li { border-top: 1px solid #f0f2f5; }
.course-purchase .course-app-card .webapp-link { gap: 11px; min-block-size: 58px; padding: 10px 2px; border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.course-purchase .course-app-card .webapp-link::before { inline-size: 7px; block-size: 27px; border-radius: 5px; background: #ffd8c3; content: ""; }
.course-purchase .course-app-card .webapp-list li:nth-child(2n) .webapp-link::before { background: #cfe5ff; }
.course-purchase .course-app-card .webapp-item__name { color: #303b48; font-size: .8125rem; font-weight: 600; }
.course-purchase .course-app-card .webapp-item__btn { gap: 4px; padding: 5px 7px; border-radius: 7px; background: transparent; color: #1875d1; font-size: .75rem; font-weight: 700; transition: background-color .18s ease; }
.course-purchase .course-app-card .webapp-link:hover { transform: none; border: 0; background: #f8fafc; box-shadow: none; }
.course-purchase .course-app-card .webapp-link:hover .webapp-item__btn { background: #eaf3ff; }
.course-purchase :is(.course-plan-card, .course-rail-action, .course-app-card) :is(a, button):focus-visible { outline: 3px solid #0878e8; outline-offset: 3px; }
.course-purchase .course-rail-action:last-child > :is(a, button) { border-bottom: 0 !important; }

@media (max-width: 1199.98px) and (min-width: 992px) {
    .course-purchase .course-plan-card .card-body { padding: 22px 18px 18px; }
    .course-plan-pricing { padding: 13px; }
    .course-purchase .course-app-card .card-body { padding: 15px; }
}

@media (prefers-reduced-motion: reduce) {
    .course-purchase :is(.course-plan-pricing, .course-rail-action, .course-app-card) *,
    .course-purchase :is(.course-plan-pricing, .course-rail-action, .course-app-card) *::before,
    .course-purchase :is(.course-plan-pricing, .course-rail-action, .course-app-card) *::after { transition-duration: .01ms !important; }
}

@media (max-width: 1199.98px) {
    .course-detail-grid { grid-template-columns: minmax(0, 1fr) 310px; gap: 28px; }
    .course-purchase .card-body { padding: 20px; }
}

@media (max-width: 991.98px) {
    .course-detail-grid { grid-template-columns: minmax(0, 1fr); }
    .course-hero { gap: 24px; }
    .course-hero h1 { font-size: clamp(1.875rem, 5vw, 2.6rem); }
    .course-hero-media { margin-block-start: 8px; }
    .course-facts { gap: 16px; }
}

@media (max-width: 767.98px) {
    .course-detail { padding: 16px 0 80px; }
    .course-hero { grid-template-columns: minmax(0, 1fr); padding-block: 0 28px; }
    .course-hero h1 { max-inline-size: 100%; font-size: clamp(1.875rem, 9vw, 2.35rem); letter-spacing: -.025em; }
    .course-eyebrow { margin-bottom: 14px; }
    .course-eyebrow::before { min-block-size: 32px; margin-inline-end: 10px; }
    .course-detail .course-categories { margin-bottom: 0; }
    .course-facts { margin-top: 20px; padding-top: 18px; gap: 32px; }
    .course-hero-media { padding: 6px; border-radius: 12px; }
    .course-hero-media img { border-radius: 7px; }
    .course-section-nav { display: flex; flex-wrap: nowrap; gap: 8px; margin-bottom: 28px; overflow-x: auto; overscroll-behavior-inline: contain; }
    .course-section-nav a { flex: 0 0 auto; padding-inline: 8px; white-space: nowrap; font-size: .875rem; }
    .course-detail .topic-btn-accordion > div { flex-wrap: wrap; gap: 4px 12px; }
    .course-detail .topic-btn-accordion { padding-block: 14px; }
    .course-detail .accordion-body.purchase { padding: 14px; }
    .course-detail .learn { flex-wrap: wrap; gap: 8px; }
    .course-detail .learn > .w-25 { width: 100% !important; max-width: 220px; }
    .course-detail .course-description { margin-top: 32px; }
}