.learning-shell {
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px 20px 48px;
}

.learning-hero,
.learning-card,
.learning-item-card,
.learning-resource-card,
.learning-question-card,
.learning-sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    box-shadow: var(--shadow-sm);
}

.learning-hero {
    padding: 28px;
    display: grid;
    gap: 16px;
    margin-bottom: 24px;
}

.learning-back-button {
    width: max-content;
}

.learning-hero-topline {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.learning-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    background: rgba(34, 94, 168, 0.1);
    color: var(--secondary-color);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.learning-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) 320px;
    gap: 24px;
    align-items: start;
}

.learning-hero-grid.has-no-sidebar {
    grid-template-columns: minmax(0, 1fr);
}

.learning-title {
    margin: 0;
    color: var(--text-main);
    font-size: clamp(30px, 5vw, 44px);
    line-height: 1.08;
}

.learning-title-row {
    display: flex;
    align-items: center;
    gap: 14px;
}

.learning-title-icon,
.learning-node-icon,
.learning-resource-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    color: var(--secondary-color);
}

.learning-title-icon {
    width: 50px;
    height: 50px;
    border-radius: 16px;
    background: rgba(34, 94, 168, 0.1);
}

.learning-title-icon svg,
.learning-node-icon svg,
.learning-resource-icon svg,
.learning-disclosure-icon svg {
    width: 100%;
    height: 100%;
}

.learning-title-icon svg {
    width: 32px;
    height: 32px;
}

.learning-copy {
    color: var(--text-sub);
    line-height: 1.72;
}

.learning-pills,
.learning-actions,
.learning-inline-meta,
.learning-item-actions,
.learning-resource-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.learning-item-actions {
    justify-content: flex-end;
    align-items: center;
}

.learning-item-actions > .secure-btn,
.learning-item-actions > a.secure-btn {
    margin-right: auto;
}

.learning-continue-actions {
    align-items: center;
}

.learning-course-navigation {
    width: min(1180px, calc(100% - 32px));
    margin: 20px auto 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.learning-course-nav-link {
    display: grid;
    gap: 4px;
    min-width: 0;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-main);
    text-decoration: none;
}

.learning-course-nav-link.is-next {
    grid-column: 2;
    text-align: right;
}

.learning-course-nav-link span {
    color: var(--text-sub);
    font-size: 13px;
    font-weight: 700;
}

.learning-course-nav-link strong {
    overflow-wrap: anywhere;
}

.learning-course-nav-link:hover {
    border-color: var(--secondary-color);
}

.learning-pill {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.14);
    color: var(--text-main);
    font-size: 13px;
    font-weight: 700;
}

.learning-pill.is-accent {
    background: rgba(198, 58, 50, 0.1);
    color: var(--primary-color);
}

.learning-cart-page .learning-hero-grid {
    align-items: start;
}

.learning-cart-form {
    display: grid;
    gap: 16px;
}

.learning-cart-list {
    display: grid;
    gap: 12px;
}

.learning-checkout-actions {
    display: grid;
    gap: 10px;
}

.learning-pay-now-btn {
    width: 100%;
}

.learning-cart-action-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.learning-cart-action-btn {
    justify-content: center;
    gap: 7px;
    min-width: 0;
    min-height: 48px;
    padding: 10px 12px;
    border-radius: 14px;
    font-size: 14px;
    line-height: 1.15;
    white-space: nowrap;
}

.learning-cart-action-row .learning-inline-form,
.learning-cart-action-row .secure-btn {
    width: 100%;
}

.learning-btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
}

.learning-btn-icon svg {
    width: 100%;
    height: 100%;
}

.learning-cart-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    margin-left: 2px;
    padding: 0 7px;
    border-radius: 999px;
    background: rgba(34, 94, 168, 0.12);
    color: var(--secondary-color);
    font-size: 12px;
    font-weight: 900;
}

.learning-alert-link {
    display: inline-flex;
    margin-left: 10px;
    color: inherit;
    font-weight: 900;
}

.learning-purchase-benefits {
    display: grid;
    gap: 10px;
    margin-top: 2px;
}

.learning-purchase-benefit {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 10px;
    align-items: start;
    padding: 12px;
    border: 1px solid rgba(15, 48, 71, 0.12);
    border-radius: 16px;
    background: rgba(15, 48, 71, 0.035);
    color: var(--text-main);
    text-decoration: none;
}

.learning-purchase-benefit.is-cart {
    border-color: rgba(34, 94, 168, 0.16);
    background: rgba(34, 94, 168, 0.07);
}

.learning-purchase-benefit.is-group {
    border-color: rgba(16, 185, 129, 0.2);
    background: rgba(16, 185, 129, 0.08);
}

.learning-purchase-benefit:hover {
    border-color: rgba(198, 58, 50, 0.24);
    transform: translateY(-1px);
}

.learning-purchase-benefit-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: #fff;
    color: var(--secondary-color);
    box-shadow: 0 10px 22px rgba(15, 48, 71, 0.08);
}

.learning-purchase-benefit-icon svg {
    width: 23px;
    height: 23px;
}

.learning-purchase-benefit strong {
    display: block;
    font-size: 14px;
    line-height: 1.35;
}

.learning-purchase-benefit p {
    margin: 4px 0 0;
    color: var(--text-sub);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.55;
}

.learning-benefit-panel,
.learning-group-benefit {
    display: grid;
    gap: 10px;
    margin-top: 14px;
    padding: 14px;
    border: 1px solid rgba(34, 94, 168, 0.14);
    border-radius: 18px;
    background: rgba(34, 94, 168, 0.06);
}

.learning-benefit-panel {
    border-color: rgba(198, 58, 50, 0.2);
    background: linear-gradient(135deg, rgba(198, 58, 50, 0.1), rgba(255, 247, 237, 0.94));
    box-shadow: 0 18px 34px rgba(198, 58, 50, 0.1);
}

.learning-group-benefit {
    border-color: rgba(16, 185, 129, 0.2);
    background: rgba(16, 185, 129, 0.08);
}

.learning-benefit-head {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-main);
}

.learning-benefit-head strong {
    font-size: 15px;
}

.learning-benefit-panel p,
.learning-group-benefit p {
    margin: 0;
    color: var(--text-sub);
    font-size: 13px;
    line-height: 1.6;
}

.learning-benefit-icon {
    flex: 0 0 auto;
    width: 34px;
    height: 34px;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 10px 22px rgba(15, 48, 71, 0.08);
}

.learning-benefit-icon svg {
    width: 22px;
    height: 22px;
}

.learning-benefit-list {
    display: grid;
    gap: 9px;
    margin-top: 12px;
}

.learning-benefit-item {
    display: grid;
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 8px;
    align-items: start;
    color: var(--text-main);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.45;
}

.learning-benefit-mark {
    width: 22px;
    height: 22px;
    border-radius: 999px;
    background: rgba(16, 185, 129, 0.12);
    color: #047857;
}

.learning-benefit-mark svg {
    width: 15px;
    height: 15px;
}

.learning-cart-item {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr) minmax(320px, 420px);
    gap: 16px;
    align-items: start;
    padding: 16px;
    border: 1px solid rgba(15, 48, 71, 0.12);
    border-radius: 8px;
    background: #fff;
}

.learning-cart-item-icon,
.learning-benefit-icon,
.learning-benefit-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
}

.learning-cart-item-icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: rgba(34, 94, 168, 0.1);
}

.learning-cart-item-icon svg {
    width: 28px;
    height: 28px;
}

.learning-cart-item h2,
.learning-cart-empty h2 {
    margin: 0;
    color: var(--text-main);
    font-size: 18px;
    line-height: 1.35;
}

.learning-cart-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 8px;
    color: var(--text-sub);
    font-size: 13px;
    font-weight: 700;
}

.learning-cart-meta a {
    color: var(--primary-color);
    text-decoration: none;
}

.learning-cart-controls {
    display: grid;
    gap: 10px;
}

.learning-icon-text-btn {
    gap: 8px;
}

.learning-cart-select-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 38px;
    gap: 10px;
    align-items: end;
}

.learning-cart-controls label {
    display: grid;
    gap: 8px;
    color: var(--text-main);
    font-size: 15px;
    font-weight: 800;
}

.learning-cart-controls select {
    width: 100%;
    min-height: 58px;
    border: 1px solid rgba(34, 94, 168, 0.22);
    border-radius: 14px;
    padding: 0 16px;
    background: #fff;
    color: var(--text-main);
    font-size: 16px;
    box-shadow: 0 12px 26px rgba(34, 94, 168, 0.07);
}

.learning-cart-selected-code {
    min-height: 58px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    border: 1px solid rgba(34, 94, 168, 0.14);
    border-radius: 14px;
    background: rgba(34, 94, 168, 0.06);
    color: var(--text-main);
    font-size: 15px;
    font-weight: 800;
}

.learning-cart-remove-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    margin-bottom: 4px;
    border: 1px solid rgba(180, 35, 24, 0.18);
    border-radius: 12px;
    background: rgba(180, 35, 24, 0.04);
    color: #b42318;
    cursor: pointer;
}

.learning-cart-remove-icon:hover {
    border-color: rgba(180, 35, 24, 0.3);
    background: rgba(180, 35, 24, 0.08);
}

.learning-cart-remove-icon svg {
    width: 19px;
    height: 19px;
}

.learning-stat-row-total {
    align-items: center;
    border-color: rgba(198, 58, 50, 0.14);
    background: rgba(198, 58, 50, 0.055);
}

.learning-stat-row-total .learning-price-current {
    font-size: 22px;
}

.learning-stat-row-total .learning-price-original {
    font-size: 14px;
}

.secure-btn.danger-soft {
    color: #b42318;
    border-color: rgba(180, 35, 24, 0.28);
    background: rgba(180, 35, 24, 0.06);
}

.secure-btn.danger-soft:hover {
    border-color: rgba(180, 35, 24, 0.46);
    background: rgba(180, 35, 24, 0.1);
}

.learning-cart-empty {
    padding: 18px;
}

.learning-cart-confirm-dialog {
    position: fixed;
    inset: 0;
    z-index: 7000;
    display: grid;
    place-items: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.learning-cart-confirm-dialog.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.learning-cart-confirm-dialog__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.42);
    backdrop-filter: blur(10px);
}

.learning-cart-confirm-dialog__card {
    position: relative;
    z-index: 1;
    width: min(440px, calc(100vw - 40px));
    max-height: calc(100vh - 40px);
    overflow: auto;
    padding: 22px;
    border-radius: 18px;
    border: 1px solid rgba(229, 231, 235, 0.92);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 26px 70px rgba(15, 23, 42, 0.24);
}

.learning-cart-confirm-dialog__card h2 {
    margin: 0 0 10px;
    font-size: 20px;
}

.learning-cart-confirm-dialog__card p {
    margin: 0 0 20px;
    color: var(--muted);
    font-weight: 700;
    line-height: 1.6;
}

@media (max-width: 760px) {
    .learning-cart-item {
        grid-template-columns: 44px minmax(0, 1fr);
    }

    .learning-cart-controls {
        grid-column: 1 / -1;
    }

    .learning-cart-item-icon {
        width: 44px;
        height: 44px;
    }

    .learning-cart-action-row {
        grid-template-columns: 1fr;
    }
}

.learning-core-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.learning-core-tag {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 10px;
    border-radius: 999px;
    background: rgba(34, 94, 168, 0.1);
    color: var(--secondary-color);
    font-size: 12px;
    font-weight: 800;
}

.learning-cover-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: linear-gradient(135deg, rgba(34, 94, 168, 0.08), rgba(198, 58, 50, 0.08));
}

.learning-cover-frame img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    background: var(--bg-card);
}

.learning-cover-frame > img {
    transition: transform 0.28s ease, filter 0.28s ease;
}

.learning-cover-frame img[src$="logoAHUST.svg"] {
    object-fit: contain;
    padding: 20px;
    background: var(--bg-card);
}

.learning-cover-frame-large {
    min-height: 160px;
}

.learning-course-hero-intro {
    display: grid;
    grid-template-columns: minmax(190px, 280px) minmax(0, 1fr);
    gap: 18px;
    align-items: center;
}

.learning-progress-ring {
    display: grid;
    gap: 12px;
}

.learning-progress-bar {
    height: 10px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.18);
    overflow: hidden;
}

.learning-progress-bar > span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
}

.learning-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) 320px;
    gap: 24px;
    align-items: start;
}

.learning-layout.has-no-sidebar {
    grid-template-columns: 1fr;
}

.learning-mask-showcase {
    display: grid;
    gap: 18px;
    padding: 24px;
    border: 1px solid color-mix(in srgb, #0ea5e9 24%, var(--border-color));
    border-radius: 28px;
    background: color-mix(in srgb, #e0f2fe 42%, var(--bg-card));
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
}

.learning-mask-showcase-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.learning-mask-showcase-head h2 {
    margin: 6px 0 0;
    color: var(--text-main);
    font-size: 24px;
    line-height: 1.18;
}

.learning-mask-eyebrow,
.learning-mask-state {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
}

.learning-mask-eyebrow {
    background: #fee2e2;
    color: #b91c1c;
    text-transform: uppercase;
}

.learning-mask-state {
    background: #dcfce7;
    color: #166534;
}

.learning-mask-description {
    max-width: 820px;
    color: var(--text-sub);
    line-height: 1.75;
}

.learning-mask-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.learning-mask-feature-card {
    --mask-feature-accent: #0ea5e9;
    --mask-feature-bg: #e0f2fe;
    --mask-feature-text: #075985;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 14px;
    align-items: flex-start;
    min-height: 132px;
    padding: 18px;
    border: 1px solid color-mix(in srgb, var(--mask-feature-accent) 26%, transparent);
    border-radius: 22px;
    background: color-mix(in srgb, var(--mask-feature-bg) 72%, var(--bg-card));
    box-shadow: none;
}

.learning-mask-feature-card:nth-child(6n + 2) {
    --mask-feature-accent: #f97316;
    --mask-feature-bg: #ffedd5;
    --mask-feature-text: #9a3412;
}

.learning-mask-feature-card:nth-child(6n + 3) {
    --mask-feature-accent: #22c55e;
    --mask-feature-bg: #dcfce7;
    --mask-feature-text: #166534;
}

.learning-mask-feature-card:nth-child(6n + 4) {
    --mask-feature-accent: #8b5cf6;
    --mask-feature-bg: #ede9fe;
    --mask-feature-text: #5b21b6;
}

.learning-mask-feature-card:nth-child(6n + 5) {
    --mask-feature-accent: #e11d48;
    --mask-feature-bg: #ffe4e6;
    --mask-feature-text: #9f1239;
}

.learning-mask-feature-card:nth-child(6n) {
    --mask-feature-accent: #14b8a6;
    --mask-feature-bg: #ccfbf1;
    --mask-feature-text: #0f766e;
}

.learning-mask-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 16px;
    color: var(--mask-feature-text);
    background: color-mix(in srgb, var(--mask-feature-accent) 18%, #ffffff);
    border: 1px solid color-mix(in srgb, var(--mask-feature-accent) 24%, transparent);
}

.learning-mask-feature-icon svg {
    width: 28px;
    height: 28px;
}

.learning-mask-feature-card h3 {
    margin: 0;
    color: var(--mask-feature-text);
    font-size: 16px;
    line-height: 1.25;
}

.learning-mask-feature-card p {
    margin: 8px 0 0;
    color: var(--text-sub);
    line-height: 1.58;
    font-size: 14px;
}

body.dark-mode .learning-mask-showcase {
    background: color-mix(in srgb, #082f49 56%, var(--bg-card));
    border-color: color-mix(in srgb, #38bdf8 22%, var(--border-color));
}

body.dark-mode .learning-mask-eyebrow {
    background: rgba(248, 113, 113, 0.18);
    color: #fca5a5;
}

body.dark-mode .learning-mask-state {
    background: rgba(74, 222, 128, 0.16);
    color: #86efac;
}

body.dark-mode .learning-mask-feature-card {
    background: color-mix(in srgb, var(--mask-feature-accent) 18%, var(--bg-card));
    border-color: color-mix(in srgb, var(--mask-feature-accent) 34%, var(--border-color));
}

body.dark-mode .learning-mask-feature-icon {
    background: color-mix(in srgb, var(--mask-feature-accent) 24%, var(--bg-card));
}

.learning-main,
.learning-sidebar,
.learning-section-stack,
.learning-resource-stack,
.learning-directory-grid {
    display: grid;
    gap: 20px;
}

.learning-section-stack {
    gap: 10px;
    align-content: start;
}

.learning-tree-section,
.learning-topic-node,
.learning-item-disclosure {
    min-width: 0;
}

.learning-item-card.learning-item-disclosure {
    position: relative;
    overflow: visible;
}

.learning-section-summary,
.learning-topic-summary,
.learning-tree-summary {
    list-style: none;
}

.learning-section-summary::-webkit-details-marker,
.learning-topic-summary::-webkit-details-marker,
.learning-tree-summary::-webkit-details-marker {
    display: none;
}

.learning-section-summary,
.learning-topic-summary,
.learning-item-summary {
    cursor: pointer;
}

.learning-public-page.is-guest-learning-preview .learning-item-summary {
    cursor: default;
    pointer-events: none;
}

.learning-public-page.is-guest-learning-preview .learning-item-disclosure > .learning-item-summary .learning-disclosure-icon {
    display: none;
}

.learning-public-page.is-guest-learning-preview .learning-item-disclosure > .learning-item-body {
    display: none !important;
}

.learning-section-summary {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}

.learning-topic-node {
    display: grid;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 16px;
    border: 1px solid rgba(34, 94, 168, 0.12);
    background: rgba(34, 94, 168, 0.035);
}

.learning-topic-summary {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: flex-start;
}

.learning-node-main {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    flex: 1 1 auto;
    min-width: 0;
}

.learning-node-copy {
    display: grid;
    gap: 4px;
    flex: 1 1 auto;
    min-width: 0;
    max-width: 100%;
}

.learning-node-copy h2,
.learning-node-copy h3 {
    margin: 0;
    color: var(--text-main);
}

.learning-node-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 28px;
    padding: 0 9px;
    border-radius: 999px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 12px;
    font-weight: 900;
    white-space: nowrap;
}

.learning-node-icon {
    width: 34px;
    height: 34px;
    border-radius: 12px;
    background: rgba(34, 94, 168, 0.1);
}

.learning-node-icon svg {
    width: 22px;
    height: 22px;
}

.learning-node-icon.is-document,
.learning-resource-icon.is-document {
    color: #0f766e;
    background: rgba(15, 118, 110, 0.1);
}

.learning-node-icon.is-topic {
    color: var(--primary-color);
    background: rgba(198, 58, 50, 0.1);
}

.learning-tree-item > .learning-item-summary .learning-node-icon {
    color: #1d4ed8;
    background: rgba(29, 78, 216, 0.1);
}

.learning-node-icon.is-exam,
.learning-resource-icon.is-exam {
    color: #b45309;
    background: rgba(245, 158, 11, 0.16);
}

.learning-node-icon.is-question_set {
    color: var(--primary-color);
    background: rgba(198, 58, 50, 0.1);
}

.learning-node-icon.is-lock {
    color: var(--text-sub);
    background: rgba(148, 163, 184, 0.14);
}

.learning-resource-icon.is-practice {
    color: #7c3aed;
    background: rgba(124, 58, 237, 0.1);
}

.learning-resource-icon.is-video {
    color: var(--primary-color);
    background: rgba(198, 58, 50, 0.1);
}

.learning-node-icon.is-facebook {
    color: #1877f2;
    background: rgba(24, 119, 242, 0.1);
}

.learning-disclosure-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    color: var(--text-sub);
    transition: transform 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.learning-item-disclosure.has-progress-state.is-in-progress > .learning-item-summary .learning-disclosure-icon {
    color: #b45309;
    background: rgba(245, 158, 11, 0.16);
}

.learning-item-disclosure.has-progress-state.is-completed > .learning-item-summary .learning-disclosure-icon {
    color: #15803d;
    background: rgba(34, 197, 94, 0.16);
}

.learning-tree-section[open] > .learning-section-summary .learning-disclosure-icon,
.learning-topic-node[open] > .learning-topic-summary .learning-disclosure-icon,
.learning-item-disclosure[open] > .learning-item-summary .learning-disclosure-icon {
    transform: rotate(180deg);
}

.learning-node-tail {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}

.learning-locked-section {
    opacity: 0.58;
    filter: grayscale(0.4);
}

.learning-locked-shell {
    display: flex;
    align-items: center;
    gap: 14px;
}

.learning-child-item-stack {
    display: grid;
    gap: 10px;
    padding-left: 18px;
    border-left: 2px solid rgba(34, 94, 168, 0.12);
}

.learning-tree-depth-1,
.learning-tree-depth-2,
.learning-tree-depth-3,
.learning-tree-depth-4 {
    background: rgba(248, 250, 252, 0.58);
}

.learning-card,
.learning-sidebar-card {
    padding: 24px;
}

.learning-directory-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.learning-directory-pagination {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
}

.learning-directory-pagination-summary {
    display: flex;
    align-items: baseline;
    gap: 6px;
    color: var(--text-sub);
    font-size: 14px;
}

.learning-directory-pagination-summary strong {
    color: var(--text-main);
}

.learning-directory-page-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.learning-directory-page-links > a,
.learning-directory-page-links > span {
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-main);
    font-weight: 800;
    line-height: 1;
    text-decoration: none;
}

.learning-directory-page-links > a:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.learning-directory-page-links > .is-current {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: #fff;
}

.learning-directory-page-size {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    color: var(--text-sub);
    font-size: 14px;
}

.learning-directory-page-size input {
    width: 68px;
    min-height: 38px;
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-main);
    font: inherit;
}

.learning-directory-page-size button {
    min-height: 38px;
    padding: 0 12px;
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    background: transparent;
    color: var(--primary-color);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

@media (max-width: 1180px) {
    .learning-directory-page .learning-directory-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.learning-directory-card {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    gap: 0;
    align-items: stretch;
    overflow: hidden;
    padding: 0;
    text-decoration: none;
    color: inherit;
    align-content: start;
    min-width: 0;
}

.learning-directory-card:hover {
    transform: translateY(-2px);
}

.learning-directory-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    height: auto;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-bottom: 1px solid var(--border-color);
    border-radius: 0;
    background: linear-gradient(135deg, color-mix(in srgb, var(--secondary-color) 10%, var(--bg-card)), color-mix(in srgb, var(--primary-color) 8%, var(--bg-card)));
}

.learning-directory-cover > img {
    position: absolute;
    inset: 0;
    z-index: 1;
    object-fit: cover;
    object-position: center;
    padding: 0;
}

.learning-directory-cover.has-svg-image > img {
    object-fit: contain;
    padding: 18px;
    background: color-mix(in srgb, var(--bg-card) 94%, var(--secondary-color));
}

.learning-directory-cover.has-svg-cover,
.learning-directory-cover.has-cover-error {
    background:
        radial-gradient(circle at 78% 22%, color-mix(in srgb, var(--primary-color) 12%, transparent), transparent 30%),
        linear-gradient(135deg, color-mix(in srgb, var(--secondary-color) 9%, var(--bg-card)), color-mix(in srgb, var(--primary-color) 6%, var(--bg-card)));
}

.learning-directory-svg-cover {
    position: relative;
    z-index: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: min(34%, 138px);
    min-width: 92px;
    aspect-ratio: 1;
    border: 1px solid color-mix(in srgb, var(--secondary-color) 14%, var(--border-color));
    border-radius: 24px;
    background: color-mix(in srgb, var(--bg-card) 92%, var(--secondary-color));
    color: var(--secondary-color);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.08);
}

.learning-directory-svg-cover svg {
    width: 54%;
    height: 54%;
}

.learning-directory-svg-badge {
    position: absolute;
    right: 14px;
    bottom: 14px;
    z-index: 2;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid color-mix(in srgb, var(--secondary-color) 14%, var(--border-color));
    border-radius: 14px;
    background: color-mix(in srgb, var(--bg-card) 94%, transparent);
    color: var(--secondary-color);
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.1);
    transition: transform 0.28s ease, color 0.28s ease;
}

.learning-directory-svg-badge svg {
    width: 26px;
    height: 26px;
}

.learning-directory-cover.has-svg-cover .learning-directory-svg-badge,
.learning-directory-cover.has-cover-error .learning-directory-svg-badge {
    display: none;
}

.learning-school-logo-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 59px;
    aspect-ratio: 1;
    padding: 0;
    box-sizing: border-box;
    flex: 0 0 auto;
    border-radius: 14px;
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.12);
    opacity: 0.96;
    overflow: hidden;
    -webkit-transform: translateZ(0);
    transform-origin: center;
    transition: transform 0.28s ease, opacity 0.28s ease, box-shadow 0.28s ease;
}

.learning-school-logo-badge img {
    position: static;
    inset: auto;
    z-index: auto;
    flex: 0 0 auto;
    width: calc(100% - 14px);
    height: calc(100% - 14px);
    max-width: none;
    max-height: none;
    display: block;
    object-fit: contain;
    object-position: center center;
    padding: 0;
    background: transparent;
}

.learning-sale-badge {
    position: absolute;
    left: 12px;
    top: 12px;
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    background: var(--primary-color);
    color: #fff;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    box-shadow: 0 10px 20px rgba(198, 58, 50, 0.24);
    z-index: 2;
}

.learning-cover-frame:hover > img,
.learning-directory-card:hover .learning-directory-cover > img {
    transform: translateY(-2px) scale(1.04);
    filter: saturate(1.08);
}

.learning-directory-card:hover .learning-directory-svg-badge {
    transform: translateY(-2px);
    color: var(--primary-color);
}

.learning-cover-frame:hover .learning-school-logo-badge,
.learning-directory-card:hover .learning-school-logo-badge {
    transform: translateY(-2px);
    opacity: 1;
    box-shadow: 0 14px 28px rgba(15, 23, 42, 0.14);
}

.learning-directory-content {
    display: grid;
    gap: 12px;
    align-content: start;
    min-width: 0;
    padding: 18px;
}

.learning-directory-price {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 2px;
}

.learning-price-current {
    color: var(--primary-color);
    font-size: 18px;
    font-weight: 900;
    white-space: nowrap;
}

.learning-price-original {
    color: var(--text-sub);
    font-size: 13px;
    font-weight: 700;
    text-decoration: line-through;
    white-space: nowrap;
}

.learning-price-sale {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 0 9px;
    border-radius: 999px;
    background: rgba(198, 58, 50, 0.1);
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 800;
}

.learning-directory-promos {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    min-width: 0;
}

.learning-directory-promos span {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 0 9px;
    border-radius: 999px;
    background: rgba(16, 185, 129, 0.1);
    color: #047857;
    font-size: 12px;
    font-weight: 850;
}

.learning-price-pair {
    display: inline-flex;
    align-items: baseline;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px;
    min-width: 0;
}

.learning-pill-price {
    gap: 8px;
}

.learning-pill-price span:first-child {
    color: var(--primary-color);
    font-weight: 900;
}

.learning-pill-price span:last-child {
    color: var(--text-sub);
    text-decoration: line-through;
}

.learning-section-head {
    display: grid;
    gap: 6px;
}

.learning-topic-stack,
.learning-item-stack {
    display: grid;
}

.learning-topic-stack {
    gap: 8px;
}

.learning-item-stack {
    gap: 10px;
}

.learning-topic-head {
    padding-top: 2px;
}

.learning-item-card,
.learning-resource-card,
.learning-question-card {
    padding: 16px;
    display: grid;
    gap: 10px;
}

.learning-item-disclosure {
    display: block;
    gap: 0;
    padding: 0;
    overflow: visible;
    box-shadow: none;
}

.learning-item-summary {
    list-style: none;
    cursor: pointer;
    padding: 12px 14px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
}

.learning-item-summary::-webkit-details-marker {
    display: none;
}

.learning-item-disclosure[open] > .learning-item-summary {
    border-bottom: 1px solid var(--border-color);
}

.learning-item-body {
    display: grid;
    gap: 0;
    padding: 0;
}

/* Cây khoá học dùng chung ngôn ngữ hiển thị với ứng dụng mobile. */
.learning-course-tree {
    display: grid;
    gap: 16px;
    min-width: 0;
}

.learning-tree-section {
    --learning-tree-accent: #0ea5e9;
    position: relative;
    min-width: 0;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--learning-tree-accent) 20%, var(--border-color));
    border-radius: 18px;
    background: var(--bg-card);
    box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
    isolation: isolate;
}

.learning-tree-accent-1 { --learning-tree-accent: #0ea5e9; }
.learning-tree-accent-2 { --learning-tree-accent: #f97316; }
.learning-tree-accent-3 { --learning-tree-accent: #22c55e; }
.learning-tree-accent-4 { --learning-tree-accent: #8b5cf6; }
.learning-tree-accent-5 { --learning-tree-accent: #e11d48; }
.learning-tree-accent-6 { --learning-tree-accent: #14b8a6; }

.learning-course-tree .learning-tree-lines {
    position: absolute;
    inset: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.learning-course-tree .learning-tree-line {
    fill: none;
    stroke: #64748b;
    stroke: color-mix(in srgb, var(--learning-tree-accent, #0ea5e9) 52%, var(--bg-card, #fff));
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    vector-effect: non-scaling-stroke;
}

.learning-course-tree .learning-tree-line.is-active {
    stroke: var(--learning-tree-accent);
}

.learning-course-tree .learning-tree-line.is-animated {
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    animation: learning-tree-line-draw var(--tree-line-duration, 240ms) ease-out var(--tree-line-delay, 0ms) both;
}

.learning-course-tree .learning-tree-line.is-active.has-glow {
    filter: drop-shadow(0 0 5px color-mix(in srgb, var(--learning-tree-accent) 38%, transparent));
}

.learning-course-tree .learning-tree-summary {
    position: relative;
    z-index: 2;
    box-sizing: border-box;
    width: 100%;
    margin: 0;
    color: var(--text-main);
    list-style: none;
}

.learning-course-tree .learning-chapter-node,
.learning-course-tree .learning-node-icon,
.learning-course-tree .learning-node-copy,
.learning-course-tree .learning-node-tail,
.learning-course-tree .learning-disclosure-icon {
    position: relative;
    z-index: 3;
}

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

.learning-course-tree .learning-section-summary {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr) 28px;
    align-items: center;
    gap: 12px;
    min-height: 56px;
    padding: 8px 12px;
    cursor: pointer;
    background: var(--bg-card);
}

.learning-course-tree .learning-section-summary:hover,
.learning-course-tree .learning-topic-summary:hover {
    background: color-mix(in srgb, var(--learning-tree-accent) 10%, var(--bg-card));
}

.learning-course-tree .learning-section-summary:focus-visible,
.learning-course-tree .learning-topic-summary:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--learning-tree-accent) 44%, transparent);
    outline-offset: -3px;
}

.learning-course-tree .learning-chapter-node {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--learning-tree-accent);
    color: var(--learning-tree-accent);
    background: var(--bg-card);
    font-size: 14px;
    font-weight: 900;
}

.learning-course-tree .learning-node-copy {
    display: block;
    min-width: 0;
}

.learning-course-tree .learning-node-copy h2,
.learning-course-tree .learning-node-copy h3,
.learning-course-tree .learning-item-title {
    margin: 0;
    color: var(--text-main);
    overflow-wrap: anywhere;
}

.learning-course-tree .learning-node-copy h2 {
    font-size: clamp(16px, 2vw, 18px);
    line-height: 1.35;
    font-weight: 850;
}

.learning-course-tree .learning-node-copy h3,
.learning-course-tree .learning-item-title {
    font-size: 15px;
    line-height: 1.42;
    font-weight: 750;
}

.learning-course-tree .learning-disclosure-icon {
    position: relative;
    display: inline-flex;
    width: 28px;
    height: 28px;
    flex: 0 0 28px;
    border-radius: 50%;
    color: var(--learning-tree-accent);
    background: color-mix(in srgb, var(--learning-tree-accent) 11%, var(--bg-card));
    transition: transform 180ms ease, background-color 180ms ease;
}

.learning-course-tree .learning-disclosure-icon::before,
.learning-course-tree .learning-disclosure-icon::after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 11px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    content: "";
    transform: translate(-50%, -50%);
}

.learning-course-tree .learning-disclosure-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.learning-course-tree .learning-tree-section[open] > .learning-section-summary .learning-disclosure-icon,
.learning-course-tree .learning-topic-node[open] > .learning-topic-summary .learning-disclosure-icon {
    transform: rotate(45deg);
}

.learning-course-tree .learning-tree-section-body {
    position: relative;
    z-index: 2;
    padding: 4px 0 10px;
}

.learning-course-tree .learning-topic-node {
    display: block;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
}

.learning-course-tree .learning-topic-summary {
    display: grid;
    grid-template-columns: 32px minmax(0, 1fr) 28px;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 7px 12px 7px 56px;
    cursor: pointer;
    background: transparent;
}

.learning-course-tree .learning-node-icon.is-topic,
.learning-course-tree .learning-lesson-node {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    color: var(--learning-tree-accent);
    background: var(--bg-card);
}

.learning-course-tree .learning-node-icon.is-topic {
    justify-self: center;
}

.learning-course-tree .learning-node-icon.is-topic svg,
.learning-course-tree .learning-lesson-node svg {
    width: 22px;
    height: 22px;
}

.learning-course-tree .learning-item-stack {
    display: block;
}

.learning-course-tree .learning-item-card {
    display: block;
    position: relative;
    min-width: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.learning-course-tree .learning-tree-depth-1,
.learning-course-tree .learning-tree-depth-2,
.learning-course-tree .learning-tree-depth-3,
.learning-course-tree .learning-tree-depth-4 {
    background: transparent;
}

.learning-course-tree .learning-item-summary {
    position: relative;
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr);
    align-items: center;
    gap: 12px;
    min-height: 46px;
    padding: 6px 12px 6px 82px;
    border: 0;
    border-top: 1px solid transparent;
    background: transparent;
    cursor: default;
}

.learning-course-tree .learning-tree-item + .learning-tree-item > .learning-item-summary {
    border-top-color: color-mix(in srgb, var(--border-color) 70%, transparent);
}

.learning-course-tree .learning-tree-item.has-short-description > .learning-item-summary {
    min-height: 58px;
}

.learning-course-tree .learning-tree-depth-1 > .learning-item-summary { padding-left: 96px; }
.learning-course-tree .learning-tree-depth-2 > .learning-item-summary { padding-left: 110px; }
.learning-course-tree .learning-tree-depth-3 > .learning-item-summary { padding-left: 124px; }

.learning-course-tree .learning-tree-depth-1.is-navigable > .learning-item-summary::before { left: 86px; }
.learning-course-tree .learning-tree-depth-2.is-navigable > .learning-item-summary::before { left: 100px; }
.learning-course-tree .learning-tree-depth-3.is-navigable > .learning-item-summary::before { left: 114px; }

.learning-course-tree .learning-item-link {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    min-width: 0;
    color: inherit;
    text-decoration: none;
}

.learning-course-tree .learning-tree-item.is-navigable > .learning-item-summary {
    cursor: pointer;
}

.learning-course-tree .learning-tree-item.is-navigable > .learning-item-summary::before {
    position: absolute;
    inset: 3px 8px 3px 72px;
    z-index: -1;
    border-radius: 10px;
    background: transparent;
    content: "";
    transition: background-color 160ms ease;
}

.learning-course-tree .learning-tree-item.is-navigable > .learning-item-summary:hover::before {
    background: color-mix(in srgb, var(--learning-tree-accent) 8%, transparent);
}

.learning-course-tree a.learning-item-link::after {
    position: absolute;
    inset: -6px 0 -6px -40px;
    z-index: 2;
    content: "";
}

.learning-course-tree a.learning-item-link:focus-visible {
    outline: none;
}

.learning-course-tree a.learning-item-link:focus-visible::after {
    border-radius: 10px;
    outline: 3px solid color-mix(in srgb, var(--learning-tree-accent) 44%, transparent);
    outline-offset: -3px;
}

.learning-course-tree .learning-lesson-main {
    display: grid;
    gap: 1px;
    min-width: 0;
}

.learning-course-tree .learning-item-short-description {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-sub);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.35;
}

.learning-course-tree .learning-item-summary-meta {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    min-width: 0;
    flex-wrap: wrap;
}

.learning-course-tree .learning-summary-token {
    display: inline-flex;
    align-items: center;
    min-height: 22px;
    padding: 2px 7px;
    border-radius: 999px;
    color: color-mix(in srgb, var(--learning-tree-accent) 72%, var(--text-main));
    background: color-mix(in srgb, var(--learning-tree-accent) 9%, var(--bg-card));
    font-size: 11px;
    font-weight: 750;
    line-height: 1;
    white-space: nowrap;
}

.learning-course-tree .learning-lesson-node {
    z-index: 4;
    pointer-events: none;
}

.learning-course-tree .learning-lesson-node.has-manual-control,
.learning-course-tree .learning-lesson-node.has-manual-control .learning-read-state-form,
.learning-course-tree .learning-lesson-node.has-manual-control .learning-read-state-btn {
    pointer-events: auto;
}

.learning-course-tree .learning-lesson-node .learning-read-state-form {
    margin: 0;
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn {
    z-index: 4;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: color-mix(in srgb, var(--learning-tree-accent) 10%, var(--bg-card));
    color: var(--learning-tree-accent);
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn:hover {
    background: color-mix(in srgb, var(--learning-tree-accent) 18%, var(--bg-card));
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn.is-unread {
    background: color-mix(in srgb, var(--border-color) 42%, var(--bg-card));
    color: var(--text-sub);
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn.is-unread:hover {
    background: color-mix(in srgb, var(--border-color) 66%, var(--bg-card));
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn.is-read {
    background: rgba(16, 185, 129, 0.14);
    color: #059669;
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn.is-read:hover {
    background: rgba(16, 185, 129, 0.22);
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--learning-tree-accent) 44%, transparent);
    outline-offset: 2px;
}

.learning-course-tree .learning-lesson-node .learning-read-state-btn svg {
    width: 19px;
    height: 19px;
}

.learning-course-tree .learning-lesson-check-icon,
.learning-course-tree .learning-lesson-lock-icon {
    display: none;
}

.learning-course-tree .learning-tree-item.has-progress-state.is-in-progress .learning-lesson-node {
    color: #b45309;
    background: rgba(245, 158, 11, 0.15);
}

.learning-course-tree .learning-tree-item.has-progress-state.is-in-progress .learning-read-state-btn.is-unread {
    color: #b45309;
    background: rgba(245, 158, 11, 0.15);
}

.learning-course-tree .learning-tree-item.has-progress-state.is-completed .learning-lesson-kind-icon {
    display: none;
}

.learning-course-tree .learning-tree-item.has-progress-state.is-completed .learning-lesson-check-icon {
    display: inline-flex;
    color: #059669;
}

.learning-course-tree .learning-tree-item.is-sample-locked .learning-lesson-kind-icon,
.learning-course-tree .learning-tree-item.is-sample-locked .learning-lesson-check-icon {
    display: none;
}

.learning-course-tree .learning-tree-item.is-sample-locked .learning-lesson-lock-icon {
    display: inline-flex;
}

.learning-course-tree .learning-tree-item.is-sample-locked .learning-lesson-node {
    color: #64748b;
    background: rgba(148, 163, 184, 0.15);
}

.learning-course-tree .learning-tree-item.is-sample-locked .learning-item-title,
.learning-course-tree .learning-tree-item.is-sample-locked .learning-item-short-description {
    color: var(--text-sub);
}

.learning-course-tree .learning-sample-boundary {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 5px 12px 5px 82px;
    color: #b45309;
    font-size: 12px;
    font-weight: 800;
}

.learning-course-tree .learning-sample-boundary::before,
.learning-course-tree .learning-sample-boundary::after {
    height: 1px;
    flex: 1 1 auto;
    background: rgba(245, 158, 11, 0.4);
    content: "";
}

.learning-course-tree .learning-sample-boundary span {
    white-space: nowrap;
}

.learning-course-tree .learning-legacy-anchor {
    position: absolute;
    inset: 0 auto auto 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.learning-course-tree .learning-tree-item.is-focus-highlight > .learning-item-summary {
    animation: learning-tree-focus 1.8s ease both;
}

@keyframes learning-tree-focus {
    0%, 100% { box-shadow: inset 0 0 0 0 transparent; }
    18%, 72% { box-shadow: inset 0 0 0 3px color-mix(in srgb, var(--learning-tree-accent) 42%, transparent); }
}

@keyframes learning-tree-line-draw {
    from { stroke-dashoffset: 1; }
    to { stroke-dashoffset: 0; }
}

body.dark-mode .learning-tree-section {
    box-shadow: 0 14px 38px rgba(0, 0, 0, 0.2);
}

body.dark-mode .learning-course-tree .learning-tree-item.has-progress-state.is-in-progress .learning-lesson-node,
body.dark-mode .learning-course-tree .learning-tree-item.has-progress-state.is-in-progress .learning-read-state-btn.is-unread,
body.dark-mode .learning-course-tree .learning-sample-boundary {
    color: #fcd34d;
}

body.dark-mode .learning-course-tree .learning-tree-item.has-progress-state.is-completed .learning-lesson-check-icon {
    color: #10b981;
}

body.dark-mode .learning-course-tree .learning-lesson-node .learning-read-state-btn.is-read {
    color: #10b981;
}

.learning-preview-page .learning-course-tree .learning-item-summary {
    padding: 11px 12px 11px 82px !important;
}

.learning-preview-page .learning-course-tree .learning-tree-depth-1 > .learning-item-summary { padding-left: 96px !important; }
.learning-preview-page .learning-course-tree .learning-tree-depth-2 > .learning-item-summary { padding-left: 110px !important; }
.learning-preview-page .learning-course-tree .learning-tree-depth-3 > .learning-item-summary { padding-left: 124px !important; }

@media (max-width: 640px) {
    .learning-course-tree {
        gap: 12px;
    }

    .learning-tree-section {
        border-radius: 15px;
    }

    .learning-course-tree .learning-section-summary {
        grid-template-columns: 36px minmax(0, 1fr) 28px;
        gap: 12px;
        padding-inline: 12px;
    }

    .learning-course-tree .learning-chapter-node {
        width: 36px;
        height: 36px;
    }

    .learning-course-tree .learning-topic-summary {
        padding-left: 56px;
        padding-right: 12px;
    }

    .learning-course-tree .learning-item-summary,
    .learning-preview-page .learning-course-tree .learning-item-summary {
        padding: 6px 10px 6px 70px !important;
    }

    .learning-course-tree .learning-tree-depth-1 > .learning-item-summary,
    .learning-preview-page .learning-course-tree .learning-tree-depth-1 > .learning-item-summary { padding-left: 80px !important; }
    .learning-course-tree .learning-tree-depth-2 > .learning-item-summary,
    .learning-preview-page .learning-course-tree .learning-tree-depth-2 > .learning-item-summary { padding-left: 90px !important; }
    .learning-course-tree .learning-tree-depth-3 > .learning-item-summary,
    .learning-preview-page .learning-course-tree .learning-tree-depth-3 > .learning-item-summary { padding-left: 100px !important; }

    .learning-course-tree .learning-item-link {
        grid-template-columns: minmax(0, 1fr);
        gap: 3px;
    }

    .learning-course-tree .learning-item-summary-meta {
        justify-content: flex-start;
    }

    .learning-course-tree .learning-tree-item.is-navigable > .learning-item-summary::before {
        left: 62px;
    }

    .learning-course-tree .learning-tree-depth-1.is-navigable > .learning-item-summary::before { left: 72px; }
    .learning-course-tree .learning-tree-depth-2.is-navigable > .learning-item-summary::before { left: 82px; }
    .learning-course-tree .learning-tree-depth-3.is-navigable > .learning-item-summary::before { left: 92px; }

    .learning-course-tree .learning-sample-boundary {
        margin-left: 70px;
        margin-right: 10px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .learning-course-tree .learning-disclosure-icon,
    .learning-course-tree .learning-tree-line,
    .learning-course-tree .learning-tree-item.is-focus-highlight > .learning-item-summary {
        animation: none;
        transition: none;
    }
}

.learning-item-section {
    padding: 14px;
}

.learning-item-section + .learning-item-section {
    border-top: 1px solid var(--border-color);
}

.learning-resource-stack.learning-item-section {
    display: grid;
    gap: 0;
    padding: 0;
}

.learning-resource-stack .learning-resource-row + .learning-resource-row {
    border-top: 1px solid var(--border-color);
}

.learning-item-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
}

.learning-resource-row {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: start;
    padding: 14px;
    box-shadow: none;
}

.learning-resource-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(34, 94, 168, 0.1);
}

.learning-resource-icon svg {
    width: 28px;
    height: 28px;
}

.learning-resource-thumb {
    display: block;
    width: 104px;
    aspect-ratio: 4 / 3;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: rgba(148, 163, 184, 0.12);
}

.learning-resource-thumb img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    background: var(--bg-card);
}

.learning-resource-thumb.is-fallback {
    background: rgba(34, 94, 168, 0.08);
}

.learning-resource-thumb-video {
    aspect-ratio: 16 / 9;
    display: grid;
    place-items: center;
    color: #1d4ed8;
    background: rgba(29, 78, 216, 0.1);
}

.learning-resource-thumb-video svg {
    width: 36px;
    height: 36px;
}

.learning-resource-content {
    display: grid;
    gap: 8px;
    min-width: 0;
}

.learning-resource-title-link {
    color: var(--secondary-color);
    text-decoration: none;
}

.learning-resource-title-link:hover {
    text-decoration: underline;
}

.learning-item-title,
.learning-card h2,
.learning-sidebar-card h2,
.learning-question-card h3,
.learning-resource-content h3 {
    margin: 0;
    color: var(--text-main);
}

.learning-item-copy,
.learning-resource-copy,
.learning-help-text,
.learning-empty {
    color: var(--text-sub);
    line-height: 1.7;
    margin: 0;
}

.learning-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--text-sub);
    font-size: 14px;
}

.learning-badge {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
}

.learning-badge.muted {
    background: rgba(148, 163, 184, 0.16);
    color: var(--text-sub);
}

.learning-badge.success {
    background: rgba(16, 185, 129, 0.14);
    color: #0f766e;
}

.learning-badge.warn {
    background: rgba(245, 158, 11, 0.16);
    color: #b45309;
}

.learning-node-tail .learning-badge {
    display: none;
}

.learning-grid-two {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.learning-form,
.learning-inline-form {
    display: grid;
    gap: 14px;
}

.learning-form input[type="text"],
.learning-form input[type="url"],
.learning-form input[type="email"],
.learning-form input[type="tel"],
.learning-form input[type="datetime-local"],
.learning-form textarea,
.learning-form select,
.learning-inline-form input[type="text"],
.learning-inline-form select,
.learning-inline-form textarea {
    width: 100%;
    min-height: 46px;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    background: var(--bg-main);
    color: var(--text-main);
    font: inherit;
}

.learning-payment-phone-form {
    max-width: 760px;
}

.learning-activation-form {
    gap: 16px;
}

.learning-activation-card {
    display: grid;
    gap: 10px;
    padding: 18px;
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 20px;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 34%),
        linear-gradient(135deg, rgba(239, 246, 255, 0.95), rgba(255, 255, 255, 0.98));
    box-shadow: 0 18px 45px rgba(37, 99, 235, 0.08);
}

.learning-activation-card strong {
    color: #0f172a;
    font-size: 20px;
    line-height: 1.25;
}

.learning-activation-card p {
    margin: 0;
    color: var(--text-sub);
    line-height: 1.65;
}

.learning-pill-amount,
.learning-stat-row-amount span,
.learning-stat-row-amount strong {
    color: #b91c1c;
    font-weight: 800;
}

.learning-stat-row-amount .learning-price-original {
    color: var(--text-sub);
    font-weight: 700;
}

.learning-pill-amount {
    min-height: 44px;
    padding: 0 18px;
    font-size: 22px;
}

.learning-stat-row-amount {
    align-items: center;
    padding: 14px 16px;
    border: 1px solid rgba(185, 28, 28, 0.18);
    border-radius: 16px;
    background: rgba(185, 28, 28, 0.06);
}

.learning-stat-row-amount strong {
    font-size: clamp(28px, 5vw, 42px);
    line-height: 1.05;
    letter-spacing: 0;
}

.learning-stat-row-amount span {
    font-size: 14px;
}

.learning-payment-phone-form .learning-phone-input {
    max-width: 260px;
    font-size: 16px;
}

.learning-cart-payment-card {
    gap: 18px;
}

.learning-cart-phone-field {
    display: grid;
    gap: 8px;
    max-width: 420px;
    color: var(--text-main);
    font-size: 16px;
    font-weight: 850;
}

.learning-cart-phone-field .learning-phone-input {
    max-width: none;
    min-height: 60px;
    padding: 0 18px;
    border: 1px solid rgba(34, 94, 168, 0.22);
    border-radius: 16px;
    background: #fff;
    color: var(--text-main);
    font-size: 22px;
    font-weight: 850;
    letter-spacing: 0.02em;
    box-shadow: 0 12px 26px rgba(34, 94, 168, 0.07);
}

.learning-cart-checkout-error {
    font-weight: 850;
}

.learning-payment-terms-card {
    display: grid;
    gap: 16px;
    padding: 18px;
    border: 1px solid rgba(34, 94, 168, 0.16);
    border-radius: 20px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(239, 246, 255, 0.98));
    box-shadow: 0 16px 34px rgba(34, 94, 168, 0.1);
    scroll-margin-top: 92px;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.learning-payment-terms-card.is-guiding {
    border-color: rgba(198, 58, 50, 0.42);
    box-shadow: 0 0 0 4px rgba(198, 58, 50, 0.1), 0 18px 38px rgba(34, 94, 168, 0.14);
    transform: translateY(-2px);
}

.learning-payment-terms-head {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
}

.learning-payment-terms-head h2,
.learning-payment-modal-card h2 {
    margin: 0;
    color: var(--text-main);
    font-size: 22px;
}

.learning-payment-terms-head p,
.learning-payment-modal-card p {
    margin: 6px 0 0;
    color: var(--text-sub);
    line-height: 1.65;
}

.learning-payment-terms-icon,
.learning-payment-terms-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    color: #fff;
    font-weight: 800;
    background: linear-gradient(135deg, var(--secondary-color), #1d7fd1);
    box-shadow: 0 16px 24px rgba(34, 94, 168, 0.2);
}

.learning-payment-terms-icon {
    width: 52px;
    height: 52px;
}

.learning-payment-terms-icon svg {
    width: 30px;
    height: 30px;
}

.learning-payment-terms-list {
    display: grid;
    gap: 12px;
}

.learning-payment-terms-item {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
    padding: 14px;
    border: 1px solid rgba(34, 94, 168, 0.1);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.9);
}

.learning-payment-terms-badge {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    font-size: 16px;
}

.learning-payment-terms-item strong {
    display: block;
    color: var(--text-main);
    margin-bottom: 4px;
}

.learning-payment-terms-item p {
    margin: 0;
    color: var(--text-sub);
    line-height: 1.6;
}

.learning-payment-terms-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(34, 94, 168, 0.07);
    color: var(--text-main);
    font-weight: 700;
}

.learning-payment-terms-check input[type="checkbox"] {
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--secondary-color);
}

.learning-payment-terms-check a {
    color: var(--secondary-color);
    font-weight: 800;
    text-decoration: none;
}

.learning-payment-terms-check a:hover {
    text-decoration: underline;
}

.learning-payment-phone-form .secure-btn[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
    pointer-events: none;
}

.learning-floating-qr-btn {
    position: fixed;
    right: max(20px, calc((100vw - 1180px) / 2 + 20px));
    bottom: 28px;
    z-index: 90;
    min-width: 280px;
    min-height: 76px;
    display: grid;
    gap: 2px;
    align-content: center;
    padding: 12px 28px;
    border-radius: 24px;
    overflow: hidden;
    font-size: 19px;
    box-shadow: 0 18px 38px rgba(198, 58, 50, 0.28);
    transform: translateZ(0);
    animation: learning-floating-qr-pulse 2.8s ease-in-out infinite;
}

.learning-floating-qr-btn::after {
    content: "";
    position: absolute;
    inset: -60% auto -60% -38%;
    width: 34%;
    transform: rotate(18deg);
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.34), transparent);
    animation: learning-floating-qr-sweep 3.6s ease-in-out infinite;
}

.learning-floating-qr-main,
.learning-floating-qr-sub {
    position: relative;
    z-index: 1;
    display: block;
    line-height: 1.2;
    white-space: nowrap;
}

.learning-floating-qr-main {
    font-size: 19px;
    font-weight: 950;
}

.learning-floating-qr-sub {
    opacity: 0.92;
    font-size: 14px;
    font-weight: 850;
}

@keyframes learning-floating-qr-pulse {
    0%, 100% {
        box-shadow: 0 18px 38px rgba(198, 58, 50, 0.26), 0 0 0 0 rgba(198, 58, 50, 0.18);
        transform: translateY(0);
    }
    50% {
        box-shadow: 0 22px 46px rgba(198, 58, 50, 0.34), 0 0 0 8px rgba(198, 58, 50, 0.08);
        transform: translateY(-2px);
    }
}

@keyframes learning-floating-qr-sweep {
    0%, 45% {
        left: -42%;
    }
    72%, 100% {
        left: 128%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .learning-floating-qr-btn,
    .learning-floating-qr-btn::after {
        animation: none;
    }
}

.learning-payment-help {
    display: grid;
    gap: 10px;
    margin-top: 20px;
    padding: 16px;
    border-radius: 16px;
    background: var(--bg-control);
    color: var(--text-main);
}

.learning-payment-help[hidden],
.learning-payment-help-manual[hidden] {
    display: none;
}

.learning-payment-help-heading {
    display: flex;
    align-items: center;
    gap: 10px;
}

.learning-payment-help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--bg-card);
}

.learning-payment-help-icon svg {
    width: 23px;
    height: 23px;
}

.learning-payment-help-heading h3 {
    margin: 0;
    color: var(--text-main);
    font-size: 17px;
    line-height: 1.45;
}

.learning-payment-help p {
    margin: 0;
    font-size: 14px;
    line-height: 1.65;
}

.learning-payment-help-actions {
    gap: 8px;
    margin-top: 4px;
}

.learning-payment-help-actions .secure-btn {
    min-height: 44px;
    max-width: 100%;
    padding: 10px 14px;
    gap: 8px;
    text-align: center;
    white-space: normal;
}

.learning-payment-help-actions svg {
    width: 18px;
    height: 18px;
    flex: 0 0 18px;
}

.learning-payment-help .learning-payment-help-hint {
    color: var(--text-main);
    font-size: 13px;
}

.learning-payment-help-feedback {
    font-weight: 600;
}

.learning-payment-help-feedback:empty {
    display: none;
}

.learning-payment-help-manual {
    display: grid;
    gap: 8px;
    min-width: 0;
    font-size: 14px;
}

.learning-payment-help-manual textarea {
    width: 100%;
    min-height: 116px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-control);
    color: var(--text-main);
    font: inherit;
    line-height: 1.65;
    resize: vertical;
}

.learning-payment-help :is(a, button, textarea):focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 3px;
}

@media (max-width: 640px) {
    .learning-payment-help-actions .secure-btn {
        width: 100%;
        justify-content: center;
    }
}

.learning-payment-modal-open {
    overflow: hidden;
}

.learning-payment-modal {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    place-items: center;
    padding: 24px;
}

.learning-payment-modal[hidden] {
    display: none;
}

.learning-payment-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.56);
    backdrop-filter: blur(4px);
}

.learning-payment-modal-card {
    position: relative;
    z-index: 1;
    width: min(720px, calc(100vw - 32px));
    display: grid;
    gap: 16px;
    padding: 26px;
    border-radius: 24px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    background: #fff;
    box-shadow: 0 28px 64px rgba(15, 23, 42, 0.26);
}

.learning-payment-modal-kicker {
    display: inline-flex;
    width: max-content;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    background: rgba(22, 163, 74, 0.12);
    color: #166534;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.learning-payment-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.06);
    color: var(--text-main);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

.learning-payment-modal-field {
    display: grid;
    gap: 8px;
    color: var(--text-main);
    font-weight: 700;
}

.learning-payment-modal-field textarea {
    width: 100%;
    min-height: 116px;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background: var(--bg-main);
    color: var(--text-main);
    font: inherit;
    line-height: 1.7;
    resize: vertical;
}

@media (max-width: 640px) {
    .learning-payment-phone-form {
        max-width: 100%;
    }

    .learning-payment-terms-head,
    .learning-payment-terms-item {
        grid-template-columns: 1fr;
    }

    .learning-payment-terms-icon,
    .learning-payment-terms-badge {
        width: 44px;
        height: 44px;
    }

    .learning-payment-modal {
        padding: 16px;
    }

    .learning-payment-modal-card {
        padding: 20px;
    }

    .learning-floating-qr-btn {
        left: 16px;
        right: 16px;
        bottom: 14px;
        width: auto;
        min-width: 0;
        min-height: 56px;
        padding: 8px 18px;
        border-radius: 16px;
        gap: 0;
        animation: none;
    }

    .learning-floating-qr-btn::after {
        display: none;
    }

    .learning-floating-qr-main {
        font-size: 16px;
    }

    .learning-floating-qr-sub {
        font-size: 12px;
    }
}

.learning-form-hint,
.learning-form-error {
    font-size: 13px;
    line-height: 1.5;
    font-weight: 600;
}

.learning-form-hint {
    color: var(--text-sub);
}

.learning-payment-course-help {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.learning-payment-course-help > span {
    display: inline-grid;
    place-items: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 800;
}

.learning-payment-course-help a {
    color: var(--primary-color);
    text-decoration: none;
}

.learning-payment-course-help a:hover {
    text-decoration: underline;
}

.learning-form-error {
    color: var(--primary-color);
}

.learning-form textarea,
.learning-inline-form textarea {
    min-height: 120px;
    resize: vertical;
}

.learning-form label,
.learning-inline-form label {
    display: grid;
    gap: 8px;
    color: var(--text-main);
    font-weight: 700;
}

.learning-school-filter-wrap {
    position: relative;
}

.learning-school-select {
    position: relative;
    width: 100%;
    min-height: 58px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 42px 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    background: var(--bg-main);
    color: var(--text-main);
    font: inherit;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
}

.learning-school-select::after {
    content: "";
    position: absolute;
    right: 15px;
    top: 50%;
    width: 9px;
    height: 9px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    opacity: 0.62;
    transform: translateY(-70%) rotate(45deg);
    transition: transform 0.16s ease;
}

.learning-school-select[aria-expanded="true"]::after {
    transform: translateY(-28%) rotate(225deg);
}

.learning-school-options {
    position: absolute;
    z-index: 30;
    left: 0;
    right: 0;
    top: calc(100% + 8px);
    display: grid;
    gap: 6px;
    max-height: min(360px, 62vh);
    overflow: auto;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: var(--bg-card);
    box-shadow: 0 22px 48px rgba(15, 48, 71, 0.14);
}

.learning-school-options[hidden] {
    display: none;
}

.learning-school-option {
    width: 100%;
    min-height: 58px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border: 1px solid transparent;
    border-radius: 14px;
    background: transparent;
    color: var(--text-main);
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
}

.learning-school-option:hover,
.learning-school-option.is-active {
    background: rgba(34, 94, 168, 0.08);
    border-color: rgba(34, 94, 168, 0.16);
}

.learning-school-option:hover {
    transform: translateY(-1px);
}

.learning-school-option-logo {
    flex: 0 0 auto;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.74);
    border: 1px solid rgba(15, 23, 42, 0.08);
    overflow: hidden;
}

.learning-school-option-logo img {
    max-width: 90%;
    max-height: 90%;
    display: block;
    object-fit: contain;
    object-position: center;
}

.learning-school-option-text {
    min-width: 0;
    min-height: 42px;
    display: grid;
    align-content: center;
    gap: 3px;
}

.learning-school-option-text strong,
.learning-school-option-text small {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.learning-school-option-text strong {
    color: var(--text-main);
    font-size: 14px;
    line-height: 1.15;
}

.learning-school-option-text small {
    color: var(--text-sub);
    font-size: 12px;
    line-height: 1.25;
    font-weight: 600;
}

.learning-alert {
    border-radius: 18px;
    padding: 14px 18px;
    font-weight: 600;
}

.learning-alert.success {
    background: rgba(16, 185, 129, 0.14);
    color: #166534;
}

.learning-alert.error {
    background: rgba(198, 58, 50, 0.12);
    color: var(--primary-color);
}

.learning-doc-preview {
    display: grid;
    gap: 16px;
}

.learning-doc-preview iframe {
    width: 100%;
    min-height: 520px;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: #fff;
}

.learning-doc-preview img {
    width: 100%;
    border-radius: 18px;
}

.learning-media-preview-frame {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 18px;
    background: #000;
    overflow: hidden;
    display: grid;
    place-items: center;
}

.learning-media-preview-frame img,
.learning-media-preview-frame iframe,
.learning-media-video-frame {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
    object-fit: contain;
}

.ahust-video-player {
    display: grid;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: color-mix(in srgb, var(--bg-card) 92%, #101827 8%);
}

.ahust-video-frame {
    position: relative;
    display: grid;
    place-items: center;
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: 220px;
    overflow: hidden;
    border-radius: 8px;
    background: #08090b;
}

.ahust-video-center-state {
    position: absolute;
    inset: auto 16px 16px 16px;
    padding: 10px 12px;
    border-radius: 8px;
    background: rgba(0, 0, 0, .64);
    color: #fff;
    text-align: center;
    font-weight: 700;
}

.ahust-video-frame video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
}

.ahust-video-load-btn {
    min-height: 46px;
    padding: 0 18px;
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 8px;
    background: #ffffff;
    color: #111827;
    font-weight: 700;
    cursor: pointer;
}

.ahust-video-load-btn:disabled {
    cursor: wait;
    opacity: .72;
}

.ahust-video-status {
    min-height: 20px;
    color: var(--text-sub);
    font-size: .95rem;
}

.ahust-video-status[data-variant="error"] {
    color: #b42318;
}

.ahust-video-timeline {
    position: relative;
    height: 18px;
    cursor: pointer;
    border-radius: 999px;
    background: color-mix(in srgb, var(--border-color) 78%, #111827 22%);
    outline: none;
}

.ahust-video-timeline:focus-visible {
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 28%, transparent);
}

.ahust-video-buffered,
.ahust-video-played,
.ahust-video-segments {
    position: absolute;
    top: 6px;
    left: 0;
    height: 6px;
    border-radius: 999px;
}

.ahust-video-buffered {
    width: 0;
    background: rgba(148, 163, 184, .58);
}

.ahust-video-played {
    width: 0;
    background: var(--primary-color);
}

.ahust-video-segments {
    right: 0;
    pointer-events: none;
}

.ahust-video-segment {
    position: absolute;
    top: -5px;
    height: 16px;
    border: 0;
    border-left: 2px solid rgba(255, 255, 255, .85);
    background: transparent;
    pointer-events: auto;
    cursor: pointer;
}

.ahust-video-thumb {
    position: absolute;
    top: 50%;
    left: 0;
    width: 16px;
    height: 16px;
    border: 3px solid #fff;
    border-radius: 50%;
    background: var(--primary-color);
    transform: translate(-50%, -50%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .24);
}

.ahust-video-chapters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 8px;
}

.ahust-video-chapter {
    display: grid;
    gap: 3px;
    min-height: 54px;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-main);
    text-align: left;
    cursor: pointer;
}

.ahust-video-chapter span {
    color: var(--text-sub);
    font-size: .82rem;
}

.ahust-video-chapter strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: .94rem;
}

.ahust-video-chapter.is-active {
    border-color: var(--primary-color);
    background: color-mix(in srgb, var(--primary-color) 10%, var(--bg-card));
}

.ahust-video-controls {
    display: grid;
    grid-template-columns: auto auto auto minmax(120px, 1fr) auto auto auto auto;
    gap: 8px;
    align-items: center;
}

.ahust-video-icon-btn,
.ahust-video-select {
    min-height: 38px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-main);
    font-weight: 700;
}

.ahust-video-icon-btn {
    min-width: 42px;
    padding: 0 10px;
    cursor: pointer;
}

.ahust-video-select {
    padding: 0 8px;
}

.ahust-video-time {
    color: var(--text-sub);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

@media (max-width: 720px) {
    .ahust-video-controls {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .ahust-video-time {
        grid-column: 1 / -1;
        order: -1;
    }

    .ahust-video-select {
        width: 100%;
    }
}

.learning-question-list {
    display: grid;
    gap: 18px;
}

.learning-question-set-form {
    display: grid;
    gap: 20px;
}

.learning-question-set-alert {
    max-width: 1340px;
    margin: 18px auto 0;
}

.learning-question-choice {
    position: relative;
}

.learning-question-choice-input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    opacity: 0;
    pointer-events: none;
    white-space: nowrap;
}

.learning-question-choice-input:focus-visible + .exam-marker-radio,
.learning-question-choice-input:focus-visible + .exam-marker-check,
.learning-question-choice-input:focus-visible + .exam-binary-marker {
    box-shadow: 0 0 0 4px rgba(15, 48, 71, 0.14);
}

.learning-question-binary-list {
    gap: 12px;
}

.learning-question-result-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 0 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 850;
    white-space: nowrap;
}

.learning-question-result-pill.is-correct {
    background: rgba(16, 185, 129, 0.12);
    color: #047857;
}

.learning-question-result-pill.is-wrong {
    background: rgba(198, 58, 50, 0.12);
    color: #9f1239;
}

.learning-question-source-note {
    margin-top: 5px;
    color: var(--text-sub);
    font-size: 12px;
    font-weight: 750;
    line-height: 1.45;
}

.learning-question-source-note a {
    color: inherit;
    text-decoration: none;
}

.learning-question-source-note a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.learning-question-login-btn {
    margin-top: 14px;
}

.learning-question-options,
.learning-true-false-grid {
    display: grid;
    gap: 12px;
}

.learning-option-row,
.learning-true-false-row {
    display: grid;
    gap: 10px;
    padding: 14px;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    background: rgba(248, 250, 252, 0.9);
}

.learning-radio-line,
.learning-checkbox-line {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    color: var(--text-main);
}

.learning-back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-color);
    font-weight: 700;
}

.secure-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-main);
    font-weight: 700;
    cursor: pointer;
}

.secure-btn.primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.learning-read-state-form {
    display: inline-flex;
    align-items: center;
    margin-left: auto;
}

.learning-read-state-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    background: var(--bg-card);
    color: var(--text-sub);
    cursor: pointer;
}

.learning-read-state-btn svg {
    width: 22px;
    height: 22px;
}

.learning-read-state-icon[hidden] {
    display: none !important;
}

.learning-context-toast {
    position: fixed;
    z-index: 80;
    max-width: min(320px, calc(100vw - 24px));
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid transparent;
    background: var(--bg-card);
    color: var(--text-main);
    font-size: 13px;
    font-weight: 800;
    line-height: 1.45;
    box-shadow: 0 14px 34px rgba(15, 23, 42, 0.18);
    opacity: 0;
    pointer-events: auto;
    cursor: copy;
    transform: translateY(6px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.learning-context-toast.is-copied {
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.18), 0 14px 34px rgba(15, 23, 42, 0.18);
}

.learning-context-toast.success {
    border-color: rgba(34, 197, 94, 0.22);
    background: #f0fdf4;
    color: #15803d;
}

.learning-context-toast.error {
    border-color: rgba(220, 38, 38, 0.22);
    background: #fef2f2;
    color: #b91c1c;
}

.learning-context-toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.learning-context-toast.is-leaving {
    opacity: 0;
    transform: translateY(-4px);
}

.learning-stat-list {
    display: grid;
    gap: 12px;
}

.learning-stat-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--text-main);
}

.learning-facebook-group-card,
.learning-facebook-media-notice {
    display: grid;
    gap: 14px;
}

.learning-facebook-group-list {
    display: grid;
    gap: 10px;
}

.learning-facebook-group-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px;
    border-radius: 16px;
    border: 1px solid rgba(24, 119, 242, 0.16);
    background: rgba(24, 119, 242, 0.055);
    color: var(--text-main);
}

.learning-facebook-group-link span:first-child {
    display: grid;
    gap: 4px;
    min-width: 0;
}

.learning-facebook-group-link small {
    color: var(--text-sub);
    line-height: 1.5;
}

.learning-facebook-group-link span:last-child {
    flex: 0 0 auto;
    color: #1877f2;
    font-weight: 800;
}

.learning-sidebar .learning-progress-ring > .learning-copy {
    color: var(--text-sub);
}

@media (max-width: 980px) {
    .learning-hero-grid,
    .learning-layout {
        grid-template-columns: 1fr;
    }

    .learning-directory-page .learning-directory-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .learning-directory-pagination {
        grid-template-columns: 1fr auto;
    }

    .learning-directory-pagination-summary {
        grid-column: 1 / -1;
    }

    .learning-mask-feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .learning-course-navigation {
        grid-template-columns: 1fr;
    }

    .learning-course-nav-link.is-next {
        grid-column: 1;
        text-align: left;
    }
}

.learning-preview-page .learning-layout {
    gap: 18px;
    align-items: start;
}

.learning-preview-page .learning-main,
.learning-preview-page .learning-sidebar,
.learning-preview-page .learning-section-stack,
.learning-preview-page .learning-resource-stack,
.learning-preview-page .learning-directory-grid {
    gap: 12px;
    align-content: start;
}

.learning-preview-page .learning-card,
.learning-preview-page .learning-sidebar-card {
    padding: 18px;
}

.learning-preview-page .learning-section-head {
    gap: 4px;
}

.learning-preview-page .learning-topic-stack {
    gap: 6px;
}

.learning-preview-page .learning-item-stack {
    gap: 8px;
}

.learning-preview-page .learning-topic-head {
    padding-top: 0;
}

.learning-preview-page .learning-item-summary {
    padding: 14px 16px;
}

.learning-preview-page .learning-item-body {
    gap: 8px;
    padding: 12px 16px 14px;
}

.learning-preview-page .learning-item-meta,
.learning-preview-page .learning-actions,
.learning-preview-page .learning-item-actions,
.learning-preview-page .learning-resource-actions {
    gap: 8px;
}

.learning-preview-page .learning-copy,
.learning-preview-page .learning-item-copy,
.learning-preview-page .learning-resource-copy,
.learning-preview-page .learning-help-text,
.learning-preview-page .learning-empty {
    line-height: 1.55;
}

@media (max-width: 720px) {
    .learning-shell {
        padding: 20px 14px 40px;
    }

    .learning-grid-two {
        grid-template-columns: 1fr;
    }

    .learning-title-row,
    .learning-course-hero-intro {
        align-items: flex-start;
    }

    .learning-course-hero-intro,
    .learning-resource-row,
    .learning-directory-card,
    .learning-mask-feature-grid,
    .learning-mask-feature-card {
        grid-template-columns: 1fr;
    }

    .learning-mask-showcase {
        padding: 18px;
        border-radius: 22px;
    }

    .learning-cover-frame-large {
        min-height: 0;
    }

    .learning-directory-cover {
        height: auto;
        min-height: 0;
    }

    .learning-section-summary,
    .learning-topic-summary,
    .learning-item-summary {
        gap: 8px;
    }

    .learning-node-main {
        gap: 8px;
        flex-wrap: nowrap;
        width: 100%;
    }

    .learning-node-icon {
        width: 32px;
        height: 32px;
        border-radius: 10px;
    }

    .learning-node-icon svg {
        width: 20px;
        height: 20px;
    }

    .learning-node-number {
        min-width: 34px;
        height: 26px;
        padding: 0 8px;
    }

    .learning-node-copy h2 {
        font-size: 22px;
        line-height: 1.35;
    }

    .learning-node-copy h3,
    .learning-item-title,
    .learning-resource-content h3 {
        font-size: 18px;
        line-height: 1.35;
        overflow-wrap: break-word;
    }

    .learning-node-tail {
        flex: 0 0 auto;
        justify-content: flex-end;
    }

    .learning-topic-node {
        padding: 8px;
    }

    .learning-child-item-stack {
        padding-left: 8px;
    }

    .learning-item-body {
        padding: 0;
    }

    .learning-facebook-group-link {
        align-items: flex-start;
        flex-direction: column;
    }

    .learning-resource-thumb {
        width: 100%;
    }

    .learning-hero,
    .learning-card,
    .learning-sidebar-card,
    .learning-resource-card,
    .learning-question-card {
        padding: 18px;
        border-radius: 20px;
    }

    .learning-directory-page .learning-filter-grid {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 10px;
    }

    .learning-directory-page .learning-filter-form {
        gap: 10px;
    }

    .learning-directory-page .learning-filter-form label {
        gap: 6px;
        font-size: 13px;
    }

    .learning-directory-page .learning-filter-form input[type="text"],
    .learning-directory-page .learning-filter-form select,
    .learning-directory-page .learning-school-select {
        min-height: 42px;
        padding: 10px 11px;
        border-radius: 12px;
        font-size: 13px;
    }

    .learning-directory-page .learning-school-select {
        padding-right: 32px;
    }

    .learning-directory-page .learning-school-select::after {
        right: 12px;
        width: 8px;
        height: 8px;
    }

    .learning-directory-page .learning-school-option-logo {
        width: 36px;
        height: 36px;
        border-radius: 10px;
    }

    .learning-directory-page .learning-school-option-text {
        min-height: 36px;
    }

    .learning-directory-page .learning-school-option-text strong {
        font-size: 12px;
    }

    .learning-directory-page .learning-school-option-text small {
        font-size: 11px;
    }

    .learning-directory-page .learning-directory-status {
        display: none;
    }

    .learning-directory-page .learning-directory-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .learning-directory-pagination {
        grid-template-columns: 1fr;
        justify-items: center;
        gap: 12px;
    }

    .learning-directory-pagination-summary,
    .learning-directory-page-size {
        justify-content: center;
    }

    .learning-directory-pagination-summary {
        grid-column: auto;
    }

    .learning-directory-page .learning-directory-grid > .learning-card:not(.learning-directory-card) {
        grid-column: 1 / -1;
    }

    .learning-directory-page .learning-directory-card {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 12px;
        border-radius: 16px;
        overflow: hidden;
        min-width: 0;
    }

    .learning-directory-page .learning-directory-content > .learning-pills,
    .learning-directory-page .learning-directory-content > .learning-copy {
        display: none;
    }

    .learning-directory-page .learning-directory-promos,
    .learning-directory-page .learning-price-sale {
        display: none;
    }

    .learning-directory-page .learning-directory-cover {
        display: flex;
        aspect-ratio: 16 / 9;
        height: auto;
        min-height: 0;
        border-radius: 12px;
        border: 1px solid var(--border-color);
    }

    .learning-directory-page .learning-directory-cover > img {
        padding: 0;
    }

    .learning-directory-page .learning-directory-cover.has-svg-image > img {
        padding: 10px;
    }

    .learning-directory-page .learning-directory-svg-cover {
        width: 58px;
        min-width: 58px;
        border-radius: 18px;
    }

    .learning-directory-page .learning-directory-svg-cover svg {
        width: 34px;
        height: 34px;
    }

    .learning-directory-page .learning-directory-svg-badge {
        right: 8px;
        bottom: 8px;
        width: 44px;
        height: 38px;
        border-radius: 12px;
    }

    .learning-directory-page .learning-directory-svg-badge svg {
        width: 23px;
        height: 23px;
    }

    .learning-directory-page .learning-school-logo-badge {
        top: 8px;
        right: 8px;
        width: 30px;
        min-width: 0;
        max-width: none;
        min-height: 0;
        padding: 0;
        border-radius: 9px;
    }

    .learning-directory-page .learning-school-logo-badge img {
        width: calc(100% - 8px);
        height: calc(100% - 8px);
        padding: 0;
    }

    .learning-directory-page .learning-directory-content {
        gap: 9px;
        padding: 0;
    }

    .learning-directory-page .learning-directory-content h2 {
        font-size: 15px;
        line-height: 1.28;
        overflow-wrap: anywhere;
    }

    .learning-directory-page .learning-core-tags {
        gap: 5px;
    }

    .learning-directory-page .learning-core-tag {
        min-height: 24px;
        padding: 0 7px;
        font-size: 10px;
        border-radius: 999px;
    }
}

@media (max-width: 420px) {
    .learning-directory-page .learning-directory-grid {
        grid-template-columns: 1fr;
    }
}