/* CERA Topics Section (V2)
   Tokens come from STFMPageV2.css (:root) -- --stfm-primary, --stfm-secondary,
   --stfm-tertiary, --stfm-heading-font, --stfm-body-font.
   Every selector is namespaced with .cera- so nothing here can reach the V1
   component or another V2 section. */

.cera-topics-section {
    background-color: #ffffff;
    padding: 3rem 0;
}

.cera-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Search panel ------------------------------------------------------- */

.cera-search-panel {
    background-color: #f8f9fa;
    border-radius: 10px;
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.cera-search-help {
    color: #444;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.25rem;
}

    .cera-search-help p:last-child {
        margin-bottom: 0;
    }

.cera-search-bar {
    display: flex;
    gap: 0.75rem;
    align-items: stretch;
}

.cera-search-input {
    flex: 1;
    min-width: 0;
    font-family: var(--stfm-body-font);
    font-size: 1rem;
    color: var(--stfm-text);
    background-color: #ffffff;
    border: 1px solid var(--stfm-border-gray);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

    .cera-search-input::placeholder {
        color: #8a949e;
    }

    .cera-search-input:focus {
        outline: none;
        border-color: var(--stfm-tertiary);
        box-shadow: 0 0 0 3px rgba(0, 150, 210, 0.15);
    }

.cera-search-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--stfm-heading-font);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #ffffff;
    background-color: var(--stfm-secondary);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.75rem;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

    .cera-search-button:hover {
        background-color: #d97b1c;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(239, 141, 43, 0.3);
    }

    .cera-search-button:focus-visible {
        outline: 3px solid rgba(239, 141, 43, 0.4);
        outline-offset: 2px;
    }

/* --- Spinner ------------------------------------------------------------ */

.cera-search-spinner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--stfm-primary);
    font-family: var(--stfm-heading-font);
    font-weight: 700;
    font-size: 1.05rem;
    padding: 1.25rem 0;
}

    .cera-search-spinner i {
        color: var(--stfm-tertiary);
        font-size: 1.35rem;
    }

    .cera-search-spinner[hidden] {
        display: none;
    }

/* --- Search results ----------------------------------------------------- */

.cera-search-results.has-results {
    margin-bottom: 2rem;
}

.cera-results-card {
    position: relative;
    background-color: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--stfm-tertiary);
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    padding: 1.75rem 2rem;
}

.cera-results-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #8a949e;
    background: none;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: color 0.2s ease, background-color 0.2s ease;
}

    .cera-results-close:hover {
        color: var(--stfm-primary);
        background-color: #f1f3f5;
    }

    .cera-results-close:focus-visible {
        outline: 3px solid rgba(0, 150, 210, 0.4);
        outline-offset: 2px;
    }

.cera-results-header {
    padding-right: 2.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(0, 150, 210, 0.1);
}

.cera-results-term,
.cera-results-count {
    margin: 0;
    font-size: 0.95rem;
}

.cera-results-term-label,
.cera-results-count-label {
    font-family: var(--stfm-heading-font);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: #6c757d;
}

.cera-results-term-value {
    font-weight: 600;
    color: var(--stfm-primary);
}

.cera-results-count-value {
    font-family: var(--stfm-heading-font);
    font-weight: 800;
    color: var(--stfm-tertiary);
}

.cera-results-empty,
.cera-results-error {
    margin: 0;
    color: #444;
    line-height: 1.6;
}

.cera-results-error {
    color: #b02a37;
}

.cera-results-page {
    display: none;
}

    .cera-results-page.active {
        display: block;
    }

/* --- Results pagination ------------------------------------------------- */

.cera-results-pagination {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.cera-results-pagination-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.cera-results-page-button {
    min-width: 38px;
    font-family: var(--stfm-heading-font);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--stfm-primary);
    background-color: #f1f3f5;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 0.45rem 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

    .cera-results-page-button:hover {
        background-color: rgba(0, 150, 210, 0.12);
    }

    .cera-results-page-button.active {
        color: #ffffff;
        background-color: var(--stfm-tertiary);
    }

    .cera-results-page-button:focus-visible {
        outline: 3px solid rgba(0, 150, 210, 0.4);
        outline-offset: 2px;
    }

.cera-results-pagination-status {
    margin: 0;
    font-size: 0.85rem;
    color: #6c757d;
}

/* --- Category layout ---------------------------------------------------- */

.cera-topics-layout {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) 2.5fr;
    gap: 1.5rem;
    align-items: start;
}

.cera-category-rail {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    background-color: #fcfdfe;
    border-radius: 10px;
    padding: 1rem;
}

.cera-category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
    text-align: left;
    background-color: #f8f9fa;
    border: none;
    border-left: 4px solid transparent;
    border-radius: 8px;
    padding: 0.85rem 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

    .cera-category-item:hover {
        background-color: rgba(0, 150, 210, 0.05);
    }

    .cera-category-item.active {
        background-color: rgba(0, 150, 210, 0.1);
        border-left-color: var(--stfm-tertiary);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    }

    .cera-category-item:focus-visible {
        outline: 3px solid rgba(0, 150, 210, 0.4);
        outline-offset: 2px;
    }

.cera-category-label {
    font-family: var(--stfm-body-font);
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.35;
    color: var(--stfm-primary);
}

.cera-category-chevron {
    flex-shrink: 0;
    font-size: 0.75rem;
    color: var(--stfm-tertiary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cera-category-item.active .cera-category-chevron {
    opacity: 1;
}

.cera-category-panels {
    background-color: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    padding: 2rem;
}

.cera-category-panel {
    display: none;
    animation: ceraFadeIn 0.4s ease forwards;
}

    .cera-category-panel.active {
        display: block;
    }

.cera-category-heading {
    font-family: var(--stfm-heading-font);
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--stfm-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(0, 150, 210, 0.1);
}

/* --- Topic (shared by the category panels and the search results) -------- */

.cera-topic {
    padding: 1.1rem 0;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.1);
}

    .cera-topic:first-of-type {
        padding-top: 0;
    }

    .cera-topic:last-of-type {
        padding-bottom: 0;
        border-bottom: none;
    }

.cera-topic-title {
    font-family: var(--stfm-heading-font);
    font-weight: 700;
    font-size: 1.05rem;
    line-height: 1.4;
    color: var(--stfm-primary);
    margin-bottom: 0.4rem;
}

.cera-topic-body {
    font-size: 0.95rem;
    line-height: 1.5;
}

.cera-topic-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    color: var(--stfm-tertiary);
    text-decoration: none;
    transition: color 0.2s ease, gap 0.2s ease;
}

    .cera-topic-link i {
        font-size: 0.8rem;
    }

    .cera-topic-link:hover {
        color: var(--stfm-primary);
        gap: 0.65rem;
        text-decoration: underline;
    }

.cera-topic-unpublished,
.cera-topic-empty {
    margin: 0;
    color: #6c757d;
    font-size: 0.9rem;
}

/* --- MeSH keywords ------------------------------------------------------ */

.cera-keyword-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    margin: 0.75rem 0 0;
    padding: 0;
}

.cera-keyword {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--stfm-heading-font);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--stfm-primary);
    background-color: #ffffff;
    border: 1px solid var(--stfm-border-gray);
    border-radius: 50px;
    padding: 0.35rem 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

    .cera-keyword i {
        font-size: 0.65rem;
        color: var(--stfm-tertiary);
        transition: color 0.2s ease;
    }

    .cera-keyword:hover {
        color: #ffffff;
        background-color: var(--stfm-tertiary);
        border-color: var(--stfm-tertiary);
    }

        .cera-keyword:hover i {
            color: #ffffff;
        }

    .cera-keyword:focus-visible {
        outline: 3px solid rgba(0, 150, 210, 0.4);
        outline-offset: 2px;
    }

/* --- Animation ---------------------------------------------------------- */

@keyframes ceraFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Responsive --------------------------------------------------------- */

@media (max-width: 991.98px) {
    .cera-topics-layout {
        grid-template-columns: 1fr;
    }

    .cera-category-rail {
        flex-direction: row;
        flex-wrap: wrap;
        background-color: transparent;
        padding: 0;
    }

    .cera-category-item {
        flex: 1 1 calc(50% - 0.3rem);
        justify-content: center;
        text-align: center;
        border-left: none;
        border-bottom: 4px solid transparent;
    }

        .cera-category-item.active {
            border-left-color: transparent;
            border-bottom-color: var(--stfm-tertiary);
        }

    .cera-category-chevron {
        display: none;
    }
}

@media (max-width: 767.98px) {
    .cera-topics-section {
        padding: 2rem 0;
    }

    .cera-search-panel {
        padding: 1.25rem;
    }

    .cera-search-bar {
        flex-direction: column;
    }

    .cera-search-button {
        justify-content: center;
    }

    .cera-results-card {
        padding: 1.5rem 1.25rem;
    }

    .cera-category-panels {
        padding: 1.25rem;
    }

    .cera-category-item {
        flex-basis: 100%;
    }

    .cera-results-pagination {
        justify-content: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .cera-category-panel {
        animation: none;
    }

    .cera-search-button:hover,
    .cera-topic-link:hover {
        transform: none;
    }
}