.course-catalogue-page {
    --course-brand-navy: #00046a;
    --course-brand-blue: #1b56f5;
    --course-brand-cyan: #01e0d7;
    --course-surface: #ffffff;
    --course-surface-muted: #f4f7fb;
    --course-text: #071133;
    --course-muted: #5f6d85;
    --course-border: #dfe6f1;
    --course-shadow-sm: 0 14px 34px rgba(15, 23, 42, .07);
    --course-shadow-md: 0 22px 54px rgba(0, 4, 106, .14);
    --course-radius-sm: 10px;
    --course-radius-md: 14px;
    --course-radius-lg: 18px;
    background:
        linear-gradient(180deg, #f7faff 0%, #eef4f8 100%);
    min-height: 100vh;
    padding: 68px 0 72px;
    color: var(--course-text);
}

.course-catalogue-shell {
    width: min(100% - 36px, 1320px);
    margin: 0 auto;
}

.course-catalogue-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    align-items: end;
    margin-bottom: 28px;
}

.course-catalogue-hero-copy {
    max-width: 760px;
}

.course-catalogue-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--course-brand-blue);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: .08em;
    line-height: 1;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.course-catalogue-eyebrow::before {
    content: "";
    width: 28px;
    height: 3px;
    border-radius: 999px;
    background: var(--course-brand-cyan);
}

.course-catalogue-hero h1 {
    color: var(--course-brand-navy);
    font-size: clamp(34px, 4vw, 56px);
    line-height: 1.02;
    font-weight: 850;
    letter-spacing: 0;
    margin: 0;
}

.course-catalogue-hero p {
    color: var(--course-muted);
    font-size: 17px;
    line-height: 1.65;
    max-width: 680px;
    margin: 14px 0 0;
}

.course-catalogue-count {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    border: 1px solid rgba(1, 224, 215, .45);
    border-radius: var(--course-radius-md);
    background: rgba(255, 255, 255, .82);
    box-shadow: var(--course-shadow-sm);
    padding: 14px 18px;
    color: var(--course-brand-navy);
    white-space: nowrap;
}

.course-catalogue-count span {
    font-size: 30px;
    line-height: 1;
    font-weight: 900;
}

.course-catalogue-count small {
    color: var(--course-muted);
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
}

.course-catalogue-toolbar {
    position: relative;
    z-index: 20;
    display: grid;
    grid-template-columns: minmax(260px, 1.4fr) repeat(4, minmax(150px, 1fr)) auto;
    gap: 12px;
    align-items: center;
    border: 1px solid var(--course-border);
    border-radius: var(--course-radius-lg);
    background: rgba(255, 255, 255, .92);
    box-shadow: var(--course-shadow-sm);
    padding: 14px;
    margin-bottom: 12px;
    overflow: visible;
}

.course-filter-field {
    display: grid;
    gap: 5px;
    margin: 0;
}

.course-filter-field span {
    color: var(--course-muted);
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
}

.course-filter-field select {
    width: 100%;
    min-height: 48px;
    border: 1px solid #cfd9e8;
    border-radius: 12px;
    background: #fff;
    color: var(--course-text);
    padding: 10px 34px 10px 12px;
}

.course-filter-field select:focus-visible,
.course-filter-submit:focus-visible,
.course-page-link:focus-visible {
    border-color: var(--course-brand-cyan);
    outline: none;
    box-shadow: 0 0 0 4px rgba(1, 224, 215, .18);
}

.course-filter-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 7px;
    align-self: end;
}

.course-filter-submit {
    min-height: 48px;
    border: 1px solid var(--course-brand-navy);
    border-radius: 12px;
    background: var(--course-brand-navy);
    color: #fff;
    padding: 10px 18px;
    font-weight: 800;
}

.course-filter-clear {
    text-decoration: none;
}

.course-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-top: 26px;
    color: var(--course-muted);
    font-size: 14px;
    font-weight: 750;
}

.course-catalogue-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 310px;
    grid-template-areas: "content filters";
    gap: 26px;
    align-items: start;
}

.course-catalogue-main {
    grid-area: content;
    min-width: 0;
}

.course-filter-sidebar {
    grid-area: filters;
    min-width: 0;
}

.course-filter-disclosure {
    overflow: hidden;
    border: 1px solid var(--course-border);
    border-radius: var(--course-radius-lg);
    background: #fff;
    box-shadow: var(--course-shadow-sm);
}

.course-filter-disclosure > summary,
.course-filter-group > summary {
    list-style: none;
    cursor: pointer;
}

.course-filter-disclosure > summary::-webkit-details-marker,
.course-filter-group > summary::-webkit-details-marker {
    display: none;
}

.course-filter-disclosure > summary {
    min-height: 56px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid transparent;
    padding: 14px 16px;
    color: var(--course-brand-navy);
    font-size: 17px;
    font-weight: 850;
}

.course-filter-disclosure[open] > summary {
    border-bottom-color: var(--course-border);
}

.course-filter-disclosure > summary span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.course-filter-disclosure > summary strong {
    border-radius: 999px;
    background: #eafffe;
    color: var(--course-brand-navy);
    padding: 4px 8px;
    font-size: 10px;
    text-transform: uppercase;
}

.course-filter-disclosure > summary > .bi-chevron-down,
.course-filter-group > summary .bi-chevron-down {
    transition: transform .18s ease;
}

.course-filter-disclosure[open] > summary > .bi-chevron-down,
.course-filter-group[open] > summary .bi-chevron-down {
    transform: rotate(180deg);
}

.course-filter-form {
    display: grid;
    gap: 14px;
    padding: 16px;
}

.course-filter-form .course-search-field {
    display: grid;
    gap: 6px;
}

.course-filter-form .course-search-field > span:first-child,
.course-filter-form .course-filter-field > span {
    color: var(--course-muted);
    font-size: 11px;
    font-weight: 850;
    text-transform: uppercase;
}

.course-search-control {
    position: relative;
    display: flex;
    align-items: center;
}

.course-search-control i {
    position: absolute;
    left: 14px;
    color: var(--course-brand-blue);
    pointer-events: none;
}

.course-filter-form .course-search-control input {
    min-height: 48px;
    padding-left: 40px;
}

.course-filter-group {
    border-top: 1px solid var(--course-border);
    padding-top: 2px;
}

.course-filter-group > summary {
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    color: var(--course-text);
    font-size: 15px;
    font-weight: 850;
}

.course-filter-options {
    display: grid;
    gap: 2px;
    padding: 0 0 8px;
}

.course-filter-options label {
    min-height: 42px;
    display: grid;
    grid-template-columns: 20px minmax(0, 1fr) auto;
    gap: 9px;
    align-items: center;
    border-radius: 9px;
    margin: 0;
    padding: 7px 8px;
    color: #33415c;
    cursor: pointer;
}

.course-filter-options label:hover {
    background: #f4f8ff;
}

.course-filter-options input {
    width: 17px;
    height: 17px;
    margin: 0;
    accent-color: var(--course-brand-navy);
}

.course-filter-options span {
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: 14px;
    line-height: 1.35;
}

.course-filter-options small {
    color: #77849a;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
}

.course-filter-form .course-filter-actions {
    grid-template-columns: 1fr;
    border-top: 1px solid var(--course-border);
    padding-top: 14px;
}

.course-page-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    border: 1px solid #cfd9e8;
    border-radius: 12px;
    background: #fff;
    color: var(--course-brand-navy);
    padding: 10px 16px;
    text-decoration: none;
}

.course-page-link.is-disabled {
    opacity: .45;
    pointer-events: none;
}

.course-pagination form {
    margin: 0;
}

.course-page-link:disabled {
    opacity: .45;
    cursor: not-allowed;
}

.course-search-field,
.course-lecturer-filter {
    position: relative;
    margin: 0;
}

.course-lecturer-filter {
    z-index: 25;
}

.course-search-field {
    display: flex;
    align-items: center;
}

.course-search-field i {
    position: absolute;
    left: 15px;
    color: var(--course-brand-blue);
    font-size: 15px;
    pointer-events: none;
}

.course-search-field input,
.course-lecturer-trigger {
    width: 100%;
    min-height: 48px;
    border: 1px solid #cfd9e8;
    border-radius: 12px;
    background: #fff;
    color: var(--course-text);
    font-size: 15px;
    padding: 11px 14px 11px 42px;
    outline: none;
    transition: border-color .18s ease, box-shadow .18s ease;
}

.course-search-field input:focus,
.course-lecturer-trigger:focus-visible,
.course-filter-clear:focus-visible,
.course-card a:focus-visible {
    border-color: var(--course-brand-cyan);
    box-shadow: 0 0 0 4px rgba(1, 224, 215, .18);
}

.course-lecturer-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #fff;
    color: var(--course-text);
    text-align: left;
}

.course-lecturer-trigger > i:first-child {
    color: var(--course-brand-blue);
    font-size: 15px;
}

.course-lecturer-trigger span {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-lecturer-chevron {
    color: #7b8798;
    font-size: 13px;
}

.course-lecturer-trigger[aria-expanded="true"] .course-lecturer-chevron {
    transform: rotate(180deg);
}

.course-lecturer-trigger:disabled {
    background: #f6f8fb;
    color: #98a2b3;
    cursor: not-allowed;
}

.course-lecturer-panel {
    position: absolute;
    z-index: 1000;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    overflow: hidden;
    min-width: 100%;
    max-height: min(420px, 64vh);
    border: 1px solid #cfd9e8;
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 24px 52px rgba(15, 23, 42, .16);
}

.course-lecturer-search {
    position: relative;
    display: flex;
    align-items: center;
    padding: 10px;
    margin: 0;
    border-bottom: 1px solid #edf1f7;
}

.course-lecturer-search i {
    position: absolute;
    left: 23px;
    color: var(--course-brand-blue);
    pointer-events: none;
}

.course-lecturer-search input {
    width: 100%;
    min-height: 40px;
    border: 1px solid #d8e1ee;
    border-radius: 10px;
    padding: 9px 12px 9px 38px;
    color: var(--course-text);
    outline: none;
}

.course-lecturer-search input:focus {
    border-color: var(--course-brand-cyan);
    box-shadow: 0 0 0 3px rgba(1, 224, 215, .16);
}

.course-lecturer-options {
    display: grid;
    max-height: 320px;
    overflow-y: auto;
    padding: 6px;
}

.course-lecturer-option {
    display: grid;
    grid-template-columns: 20px minmax(0, 1fr);
    gap: 9px;
    align-items: start;
    border-radius: 10px;
    padding: 9px 10px;
    color: var(--course-text);
    cursor: pointer;
    margin: 0;
}

.course-lecturer-option:hover {
    background: #f4f8ff;
}

.course-lecturer-option input {
    width: 16px;
    height: 16px;
    margin-top: 2px;
    accent-color: var(--course-brand-navy);
}

.course-lecturer-option-name {
    min-width: 0;
    color: var(--course-text);
    font-size: 14px;
    font-weight: 750;
    line-height: 1.4;
    overflow-wrap: anywhere;
}

.course-filter-clear {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid #cfd9e8;
    border-radius: 12px;
    background: #fff;
    color: #43516a;
    padding: 10px 18px;
    font-weight: 750;
    transition: border-color .18s ease, color .18s ease, background .18s ease;
}

.course-filter-clear:hover {
    border-color: var(--course-brand-blue);
    color: var(--course-brand-navy);
    background: #f8fbff;
}

.course-catalogue-results {
    min-height: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    color: var(--course-muted);
    font-size: 13px;
    font-weight: 750;
    margin: 0 4px 12px;
}

.course-catalogue-results strong {
    color: var(--course-brand-navy);
    font-size: 16px;
    font-weight: 850;
}

.course-catalogue-results span {
    text-align: right;
}

.course-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: stretch;
}

.course-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--course-border);
    border-radius: var(--course-radius-lg);
    background: var(--course-surface);
    box-shadow: var(--course-shadow-sm);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.course-card:hover {
    transform: translateY(-4px);
    border-color: rgba(1, 224, 215, .72);
    box-shadow: var(--course-shadow-md);
}

.course-card-media {
    position: relative;
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: linear-gradient(135deg, #00046a 0%, #1235a4 46%, #01c9c2 100%);
    text-decoration: none;
}

.course-card-media img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    color: transparent;
    transition: transform .28s ease;
}

.course-card:hover .course-card-media img {
    transform: scale(1.026);
}

.course-card-media::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 44%;
    background: linear-gradient(180deg, rgba(0, 4, 106, 0) 0%, rgba(0, 4, 106, .42) 100%);
    pointer-events: none;
}

.course-image-fallback {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    color: #fff;
    text-align: center;
}

.course-image-fallback.is-backup {
    position: absolute;
    inset: 0;
    z-index: 1;
    opacity: 0;
    visibility: hidden;
    transition: opacity .18s ease, visibility .18s ease;
}

.course-card-media.has-image-error img {
    opacity: 0;
    visibility: hidden;
}

.course-card-media.has-image-error .course-image-fallback.is-backup {
    opacity: 1;
    visibility: visible;
}

.course-image-fallback span {
    position: absolute;
    right: 18px;
    top: 16px;
    font-size: 13px;
    font-weight: 900;
    letter-spacing: .12em;
}

.course-image-fallback strong {
    display: inline-grid;
    place-items: center;
    width: 92px;
    height: 92px;
    border: 1px solid rgba(255, 255, 255, .36);
    border-radius: 50%;
    background: rgba(255, 255, 255, .14);
    box-shadow: inset 0 0 0 10px rgba(255, 255, 255, .05);
    font-size: 26px;
    font-weight: 900;
}

.course-status-badge,
.course-preview-badge {
    position: absolute;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 999px;
    box-shadow: 0 10px 22px rgba(15, 23, 42, .18);
    font-size: 12px;
    font-weight: 850;
    line-height: 1;
    padding: 8px 11px;
}

.course-status-badge {
    left: 14px;
    top: 14px;
    background: rgba(255, 255, 255, .94);
    color: var(--course-brand-navy);
}

.course-preview-badge {
    right: 14px;
    bottom: 14px;
    background: rgba(0, 4, 106, .92);
    color: #fff;
}

.course-card-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 12px;
    padding: 20px 20px 16px;
}

.course-card-category {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    width: fit-content;
    color: var(--course-brand-blue);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: .04em;
    line-height: 1;
    text-transform: uppercase;
}

.course-card-title {
    color: var(--course-brand-navy);
    font-size: 22px;
    line-height: 1.22;
    font-weight: 850;
    letter-spacing: 0;
    margin: 0;
    min-height: 54px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card-title a {
    color: inherit;
    text-decoration: none;
    border-radius: 8px;
}

.course-card-title a:hover {
    color: var(--course-brand-blue);
}

.course-card-description {
    color: #41506a;
    font-size: 14px;
    line-height: 1.58;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-instructor {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    border: 1px solid #edf1f7;
    border-radius: var(--course-radius-md);
    background: #fbfdff;
    padding: 11px;
}

.course-instructor-avatar {
    width: 44px;
    height: 44px;
    display: inline-grid;
    place-items: center;
    border-radius: 50%;
    background: linear-gradient(135deg, #00046a, #01c9c2);
    color: #fff;
    font-weight: 900;
}

.course-instructor span {
    display: block;
    color: #68758b;
    font-size: 11px;
    font-weight: 850;
    text-transform: uppercase;
}

.course-instructor strong {
    display: block;
    color: var(--course-text);
    font-size: 14px;
    line-height: 1.35;
    font-weight: 850;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-metadata {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: #4d5c75;
}

.course-metadata span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 30px;
    border: 1px solid #e3eaf3;
    border-radius: 999px;
    background: var(--course-surface-muted);
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 750;
}

.course-metadata i {
    color: var(--course-brand-blue);
}

.course-card-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    border-top: 1px solid #edf1f7;
    background: #fbfcff;
    padding: 14px 20px 18px;
    margin-top: auto;
}

.course-action-primary,
.course-action-secondary {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 850;
    line-height: 1.1;
    transition: background .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}

.course-action-primary {
    background: var(--course-brand-navy);
    color: #fff;
    padding: 12px 16px;
}

.course-action-primary:hover {
    background: #0812a0;
    color: #fff;
}

.course-action-secondary {
    border: 1px solid rgba(1, 180, 173, .48);
    background: #eafffe;
    color: var(--course-brand-navy);
    padding: 12px 14px;
}

.course-action-secondary:hover {
    border-color: var(--course-brand-cyan);
    background: #d9fffd;
    color: var(--course-brand-navy);
}

.course-empty-state {
    border: 1px dashed #cbd5e1;
    border-radius: var(--course-radius-lg);
    background: rgba(255, 255, 255, .86);
    padding: 44px 24px;
    text-align: center;
    color: var(--course-muted);
}

.course-empty-state[hidden] {
    display: none;
}

.course-empty-state h2 {
    color: var(--course-brand-navy);
    font-size: 24px;
    font-weight: 850;
    margin: 12px 0 6px;
}

.course-empty-state p {
    margin: 0;
}

.course-empty-icon {
    width: 58px;
    height: 58px;
    display: inline-grid;
    place-items: center;
    border-radius: 50%;
    background: #eafffe;
    color: var(--course-brand-navy);
    font-size: 24px;
}

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

@media (max-width: 940px) {
    .course-catalogue-layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "filters"
            "content";
    }

    .course-filter-sidebar {
        position: static;
    }
}

@media (max-width: 760px) {
    .course-catalogue-page {
        padding: 64px 0 48px;
    }

    .course-catalogue-shell {
        width: min(100% - 24px, 1320px);
    }

    .course-catalogue-hero,
    .course-catalogue-toolbar {
        grid-template-columns: 1fr;
    }

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

    .course-catalogue-hero {
        gap: 16px;
        align-items: start;
    }

    .course-catalogue-hero p {
        font-size: 15px;
    }

    .course-catalogue-count {
        width: fit-content;
        padding: 11px 14px;
    }

    .course-catalogue-results {
        align-items: flex-end;
    }

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

    .course-card-body {
        padding: 18px 16px 14px;
    }

    .course-card-title {
        font-size: 20px;
        min-height: auto;
    }

    .course-card-actions {
        grid-template-columns: 1fr;
        padding: 14px 16px 16px;
    }
}

@media (min-width: 1600px) {
    .course-catalogue-shell {
        width: min(100% - 48px, 1420px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .course-card,
    .course-card-media img,
    .course-action-primary,
    .course-action-secondary,
    .course-filter-clear,
    .course-search-field input {
        transition: none;
    }

    .course-card:hover,
    .course-card:hover .course-card-media img {
        transform: none;
    }
}