/* Newsfeed polish layer: leaner social UI, cleaner mobile rhythm, lighter scroll cost. */
#newsfeed-feed-root {
    --feed-green: #00A651;
    --feed-green-dark: #008A44;
    --feed-soft-green: #edf9f2;
    --feed-ink: #122018;
    --feed-muted: #667568;
    --feed-line: #dce8df;
}

#newsfeed-feed-root .quick-links-bar {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    padding: 10px;
}

#newsfeed-feed-root .quick-link-btn {
    min-height: 48px;
    justify-content: center;
    border-radius: 12px;
    font-weight: 700;
}

#newsfeed-feed-root .create-post {
    overflow: hidden;
}

#newsfeed-feed-root .create-post-form {
    align-items: flex-start;
}

#newsfeed-feed-root #composer-focus-wrapper {
    width: 100%;
}

#newsfeed-feed-root #post-form textarea,
#newsfeed-feed-root #post-form [name="content"] {
    min-height: 48px;
    max-height: 160px;
    line-height: 1.45;
    resize: none;
}

#newsfeed-feed-root .create-post.composer-active {
    border-color: rgba(0, 166, 81, 0.24);
    box-shadow: 0 10px 28px rgba(15, 64, 35, 0.08);
}

#newsfeed-feed-root #post-actions-row {
    margin: 0 14px 14px;
}

#newsfeed-feed-root .create-post-btn {
    min-height: 44px;
    border-radius: 12px;
    background: var(--feed-green);
    border-color: var(--feed-green);
}

#newsfeed-feed-root .create-post-btn:hover {
    background: var(--feed-green-dark);
    border-color: var(--feed-green-dark);
}

#newsfeed-feed-root .post-card {
    box-shadow: 0 8px 22px rgba(25, 48, 31, 0.06);
    overflow: clip;
}

#newsfeed-feed-root .post-header {
    align-items: flex-start;
}

#newsfeed-feed-root .post-user-link {
    min-width: 0;
}

#newsfeed-feed-root .post-author {
    color: var(--feed-ink);
    line-height: 1.2;
}

#newsfeed-feed-root .post-time {
    color: var(--feed-muted);
    line-height: 1.35;
}

#newsfeed-feed-root .post-content {
    color: #1f2937;
    font-size: 1rem;
    line-height: 1.58;
    white-space: pre-line;
}

#newsfeed-feed-root .post-media,
#newsfeed-feed-root .post-video {
    background: #eef3ef;
    border: 0;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

#newsfeed-feed-root img.post-media {
    aspect-ratio: auto !important;
    min-height: 0 !important;
    height: auto !important;
    background: transparent !important;
}

#newsfeed-feed-root .post-media.loading {
    min-height: 220px;
    background:
        linear-gradient(90deg, #eef3ef 25%, #f7faf8 37%, #eef3ef 63%);
    background-size: 400% 100%;
    animation: feedSkeleton 1.15s ease-in-out infinite;
}

#newsfeed-feed-root img.post-media.loading,
#newsfeed-feed-root img.post-media:not(.loaded):not([hidden]) {
    min-height: 0 !important;
    background: transparent !important;
}

@keyframes feedSkeleton {
    0% { background-position: 100% 50%; }
    100% { background-position: 0 50%; }
}

#newsfeed-feed-root .post-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    padding: 8px 14px 12px;
    border-top: 1px solid var(--feed-line);
}

#newsfeed-feed-root .action-btn {
    min-height: 42px;
    border-radius: 12px;
    justify-content: center;
    border: 1px solid #dce8df;
    background: #fff;
    color: #5f6f63;
    font-weight: 800;
}

#newsfeed-feed-root .share-post-btn {
    color: var(--feed-muted);
}

#newsfeed-feed-root .action-btn:hover,
#newsfeed-feed-root .share-post-btn:hover {
    background: var(--feed-soft-green);
    color: var(--feed-green-dark);
    border-color: rgba(0, 166, 81, 0.28);
}

#newsfeed-feed-root .action-btn.liked,
#newsfeed-feed-root .action-btn.comments-open {
    background: var(--feed-green);
    border-color: var(--feed-green);
    color: #fff;
    box-shadow: none;
}

#newsfeed-feed-root .action-btn.liked .action-count,
#newsfeed-feed-root .action-btn.comments-open .action-count {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}

#newsfeed-feed-root .action-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 7px;
    border-radius: 999px;
    background: #eaf5ee;
    color: var(--feed-green-dark);
    font-weight: 900;
}

.newsfeed-toast {
    position: fixed;
    left: 50%;
    bottom: calc(18px + env(safe-area-inset-bottom));
    z-index: 10050;
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    max-width: min(320px, calc(100vw - 32px));
    padding: 0 16px;
    border-radius: 999px;
    background: #122018;
    color: #fff;
    font-size: 0.92rem;
    font-weight: 700;
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.2);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 12px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.newsfeed-toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

.share-modal-open {
    overflow: hidden;
}

.share-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2147483600;
    display: none;
    background: rgba(15, 23, 42, 0.42);
}

.share-modal-overlay.show {
    display: block;
    animation: shareOverlayIn 0.18s ease-out;
}

/* Desktop: conventional centered dialog. Mobile (≤768px below) restyles the
   SAME element as a bottom sheet — one component, per-device presentation. */
.share-modal {
    position: fixed;
    left: 50%;
    top: 50%;
    z-index: 2147483601;
    width: min(430px, calc(100vw - 28px));
    display: none;
    padding: 18px;
    border: 1px solid #dbe8df;
    border-radius: 24px;
    background: #fff;
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.26);
    transform: translate(-50%, -50%);
}

.share-modal.show {
    display: block !important;
    animation: shareModalIn 0.18s ease-out;
}

@keyframes shareOverlayIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes shareModalIn {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.96); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.share-modal-handle {
    display: none;
    width: 42px;
    height: 4px;
    margin: 0 auto 12px;
    border-radius: 999px;
    background: #d9e5dd;
}

.share-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 16px;
}

.share-modal-header h3 {
    margin: 0;
    color: #122018;
    font-size: 1.15rem;
    font-weight: 800;
}

.share-modal-header p {
    margin: 4px 0 0;
    color: #667568;
    font-size: 0.9rem;
    line-height: 1.4;
}

.share-modal-close {
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 50%;
    background: #f1f5f2;
    color: #475569;
    font-size: 1.4rem;
    line-height: 1;
}

.share-modal-options {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.share-option {
    min-height: 76px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 8px;
    border: 1px solid #dce8df;
    border-radius: 16px;
    background: #fbfdfb;
    color: #122018;
    font-size: 0.82rem;
    font-weight: 700;
    text-align: center;
    text-decoration: none;
}

.share-option:hover {
    border-color: rgba(0, 166, 81, 0.32);
    background: #edf9f2;
    color: #008A44;
}

.share-option i {
    color: #00A651;
    font-size: 1.25rem;
}

.share-link-preview {
    margin-top: 14px;
    padding: 10px 12px;
    border-radius: 12px;
    background: #f6faf7;
    color: #667568;
    font-size: 0.78rem;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#newsfeed-feed-root .comments {
    border-top: 1px solid var(--feed-line);
    background: #fbfdfb;
}

#newsfeed-feed-root .comment-form {
    align-items: center;
}

#newsfeed-feed-root .comment-input {
    min-height: 42px;
}

#newsfeed-feed-root .comment-submit-btn {
    width: auto;
    min-width: 72px;
    padding-inline: 14px;
}

#newsfeed-feed-root .empty-feed-card {
    padding: 34px 20px;
    text-align: center;
}

#newsfeed-feed-root .empty-feed-card h3 {
    margin: 12px 0 6px;
    color: var(--feed-ink);
    font-size: 1.2rem;
    font-weight: 800;
}

#newsfeed-feed-root .empty-feed-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 18px;
}

#newsfeed-feed-root .empty-feed-actions a {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid var(--feed-line);
    background: #fff;
    color: var(--feed-green-dark);
    font-weight: 700;
    text-decoration: none;
}

#newsfeed-feed-root .scroll-trigger .loading-indicator {
    border: 1px solid var(--feed-line);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 6px 18px rgba(25, 48, 31, 0.06);
}

@media (max-width: 768px) {
    #newsfeed-feed-root .quick-links-bar {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        padding: 10px 12px;
        scroll-snap-type: x proximity;
        scrollbar-width: none;
    }

    #newsfeed-feed-root .quick-links-bar::-webkit-scrollbar {
        display: none;
    }

    #newsfeed-feed-root .quick-link-btn {
        flex: 0 0 auto;
        min-width: 132px;
        min-height: 44px;
        scroll-snap-align: start;
    }

    #newsfeed-feed-root .create-post {
        border-radius: 0;
        box-shadow: none;
    }

    #newsfeed-feed-root .create-post-form {
        padding: 12px;
        gap: 10px;
    }

    #newsfeed-feed-root #post-form textarea,
    #newsfeed-feed-root #post-form [name="content"] {
        min-height: 44px;
        font-size: 0.98rem;
    }

    #newsfeed-feed-root .create-post .media-attachment-area {
        padding: 0 12px 12px;
    }

    #newsfeed-feed-root .create-post .social-action-btn {
        min-height: 42px;
        border-radius: 999px;
    }

    #newsfeed-feed-root .post-card {
        border-radius: 0;
        border-left: 0;
        border-right: 0;
        box-shadow: none;
    }

    #newsfeed-feed-root .post-header {
        padding: 12px;
    }

    #newsfeed-feed-root .post-content {
        padding: 0 12px 12px;
        font-size: 0.98rem;
    }

    #newsfeed-feed-root .post-media,
    #newsfeed-feed-root .post-video {
        width: 100%;
        border-radius: 0;
        max-height: 78vh;
    }

    #newsfeed-feed-root img.post-media {
        aspect-ratio: auto !important;
        min-height: 0 !important;
        height: auto !important;
        background: transparent !important;
    }

    #newsfeed-feed-root .post-media.loading {
        min-height: 0 !important;
    }

    #newsfeed-feed-root .post-actions {
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        gap: 6px !important;
        padding: 8px 10px 10px !important;
        margin-top: 0 !important;
        width: 100% !important;
    }

    #newsfeed-feed-root .action-btn {
        width: 100% !important;
        max-width: none !important;
        min-width: 0 !important;
        min-height: 42px !important;
        gap: 5px !important;
        padding: 0 6px !important;
        border-radius: 11px !important;
        font-size: 0.88rem !important;
        white-space: nowrap !important;
        border: 1px solid #dce8df !important;
    }

    #newsfeed-feed-root .action-btn i {
        font-size: 0.98rem;
        flex: 0 0 auto;
    }

    #newsfeed-feed-root .action-label {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        text-align: center;
    }

    #newsfeed-feed-root .action-count {
        min-width: 22px;
        height: 22px;
        padding: 0 6px;
        font-size: 0.78rem;
        flex: 0 0 auto;
    }

    #newsfeed-feed-root .action-btn.liked,
    #newsfeed-feed-root .action-btn.comments-open {
        background: var(--feed-green) !important;
        border-color: var(--feed-green) !important;
        color: #fff !important;
    }

    #newsfeed-feed-root .comments {
        padding: 10px 12px 12px;
    }

    #newsfeed-feed-root .comment {
        gap: 8px;
    }

    #newsfeed-feed-root .comment-form {
        gap: 8px;
    }

    #newsfeed-feed-root .comment-submit-btn {
        min-width: 64px;
    }

    /* Bottom sheet: thumb-reachable, familiar mobile pattern. Plain (non-
       !important) transform so the slide-up keyframe can drive it — CSS
       animations never beat !important declarations. */
    .share-modal {
        left: 0;
        right: 0;
        top: auto;
        bottom: 0;
        width: 100%;
        max-height: min(78vh, 640px);
        padding: 10px 16px calc(18px + env(safe-area-inset-bottom, 0px));
        border: 0;
        border-top: 1px solid #dbe8df;
        border-radius: 22px 22px 0 0;
        transform: none;
        overflow-y: auto;
        overscroll-behavior: contain;
        box-shadow: 0 -20px 56px rgba(15, 23, 42, 0.32);
    }

    .share-modal.show {
        animation: shareSheetUp 0.28s cubic-bezier(0.32, 0.72, 0.33, 1);
    }

    .share-modal-handle {
        display: block;
    }

    .share-modal-options {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .share-option {
        min-height: 74px;
    }
}

@keyframes shareSheetUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

@media (max-width: 360px) {
    #newsfeed-feed-root .post-actions {
        gap: 4px !important;
        padding-left: 8px !important;
        padding-right: 8px !important;
    }

    #newsfeed-feed-root .action-btn {
        gap: 4px !important;
        padding: 0 4px !important;
        font-size: 0.8rem !important;
    }

    #newsfeed-feed-root .action-btn i {
        font-size: 0.92rem;
    }

    #newsfeed-feed-root .action-count {
        min-width: 20px;
        height: 20px;
        padding: 0 5px;
        font-size: 0.72rem;
    }

    .share-modal-options {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (prefers-reduced-motion: reduce) {
    #newsfeed-feed-root .post-media.loading {
        animation: none;
    }

    .share-modal.show,
    .share-modal-overlay.show {
        animation: none;
    }
}

/* Guest Auth Modal */
.auth-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    z-index: 99999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-modal-content {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    max-width: 420px;
    width: 100%;
    text-align: center;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: modalPopUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.auth-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: transparent;
    border: none;
    font-size: 28px;
    color: #64748b;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.auth-modal-close:hover {
    color: #0f172a;
    background: #f1f5f9;
}

.auth-modal-icon {
    font-size: 48px;
    color: var(--hub-accent, #00A651);
    margin-bottom: 20px;
}

.auth-modal-content h2 {
    font-size: 22px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 12px;
}

.auth-modal-content p {
    font-size: 15px;
    color: #475569;
    line-height: 1.5;
    margin-bottom: 28px;
}

.auth-modal-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-modal-actions .create-post-btn {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: 16px;
}

.auth-modal-actions .create-post-secondary {
    background: #f1f5f9;
    color: #0f172a;
    border: 1px solid #e2e8f0;
}

.auth-modal-actions .create-post-secondary:hover {
    background: #e2e8f0;
}

@keyframes modalPopUp {
    from {
        transform: scale(0.95) translateY(10px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

/* 2026 mobile feed refinement: compact learner actions, filters, and reliable media fit. */
#newsfeed-feed-root .feed-filter-bar {
    display: flex;
    gap: 8px;
    padding: 8px 10px 10px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-padding-inline: 10px;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    background: #fff;
    border-bottom: 1px solid var(--feed-line);
}

#newsfeed-feed-root .feed-search-filter {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 10px;
    width: calc(100% - 20px) !important;
    max-width: calc(100% - 20px) !important;
    box-sizing: border-box;
    padding: 0 10px;
    min-height: 44px;
    border: 1px solid #dce8df;
    border-radius: 999px;
    background: #fff;
    color: #708071;
}

#newsfeed-feed-root .feed-search-filter input {
    flex: 1;
    min-width: 0;
    min-height: 40px;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--feed-ink);
    font-size: 0.92rem;
}

#newsfeed-feed-root .feed-search-filter button {
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 50%;
    background: #f1f6f3;
    color: #526558;
}

#newsfeed-feed-root .feed-filter-bar::-webkit-scrollbar {
    display: none;
}

#newsfeed-feed-root .feed-filter-chip {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    flex: 0 0 auto;
    padding: 0 14px;
    border: 1px solid #dce8df;
    border-radius: 999px;
    background: #fff;
    color: #526558;
    font-size: 0.86rem;
    font-weight: 800;
    line-height: 1;
    white-space: nowrap;
    scroll-snap-align: start;
    scroll-snap-stop: always;
}

#newsfeed-feed-root .feed-filter-chip i,
#newsfeed-feed-root .feed-filter-chip span {
    font-size: 0.86rem;
    line-height: 1;
}

#newsfeed-feed-root .feed-filter-chip.active {
    background: var(--feed-green);
    border-color: var(--feed-green);
    color: #fff;
}

#newsfeed-feed-root .feed-filter-hidden {
    display: none !important;
}

#newsfeed-feed-root .post-learning-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 0 14px 12px;
}

#newsfeed-feed-root .post-learning-tags:empty {
    display: none;
}

#newsfeed-feed-root .post-learning-tags:not(:has(.post-learning-tag)) {
    display: none;
}

#newsfeed-feed-root .post-learning-tag {
    max-width: 100%;
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 10px;
    border-radius: 999px;
    background: #f3faf5;
    color: #24533a;
    font-size: 0.76rem;
    font-weight: 800;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#newsfeed-feed-root .post-learning-tag.is-question {
    background: #fff7e7;
    color: #945f00;
}

#newsfeed-feed-root .post-learning-tag.is-video {
    background: #eef4ff;
    color: #2656b5;
}

#newsfeed-feed-root .post-learning-tag.is-poll {
    background: #f2eefe;
    color: #5b35a8;
}

#newsfeed-feed-root .post-learning-tag.is-image {
    background: #eef9fb;
    color: #176b7a;
}

#newsfeed-feed-root .ask-mode-panel {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 8px;
}

#newsfeed-feed-root .ask-mode-choice,
#newsfeed-feed-root .poll-cancel-btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid #dce8df;
    border-radius: 14px;
    background: #fbfdfb;
    color: #294636;
    font-size: 0.84rem;
    font-weight: 800;
}

#newsfeed-feed-root .poll-composer {
    display: grid;
    gap: 8px;
    margin-top: 8px;
    padding: 10px;
    border: 1px solid #dce8df;
    border-radius: 16px;
    background: #fbfdfb;
}

#newsfeed-feed-root .poll-composer[hidden],
#newsfeed-feed-root .ask-mode-panel[hidden] {
    display: none !important;
}

#newsfeed-feed-root .poll-composer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

#newsfeed-feed-root .poll-composer-head strong {
    color: var(--feed-ink);
    font-size: 0.92rem;
}

#newsfeed-feed-root .poll-composer select,
#newsfeed-feed-root .poll-composer input {
    min-height: 42px;
    width: 100%;
    border: 1px solid #dce8df;
    border-radius: 12px;
    background: #fff;
    color: var(--feed-ink);
    padding: 0 12px;
    font-size: 0.9rem;
}

#newsfeed-feed-root .poll-composer-head select {
    width: auto;
    min-width: 118px;
}

#newsfeed-feed-root .poll-correct-field,
.newsfeed-container .poll-correct-field {
    display: grid;
    gap: 8px;
    margin-top: 2px;
    padding: 10px;
    border: 1px solid #dbe8df;
    border-radius: 14px;
    background: #f6fbf8;
    color: #334155;
    font-size: 0.82rem;
    font-weight: 800;
}

#newsfeed-feed-root .poll-correct-field small,
.newsfeed-container .poll-correct-field small {
    color: #64748b;
    font-size: 0.74rem;
    font-weight: 700;
}

#newsfeed-feed-root #poll-correct-select,
#poll-correct-select {
    min-height: 48px !important;
    width: 100%;
    appearance: none !important;
    -webkit-appearance: none !important;
    border-color: #cfe0d4 !important;
    border-radius: 14px !important;
    background-color: #fff !important;
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5 7.5L10 12.5L15 7.5' stroke='%23334555' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px 18px;
    padding: 0 42px 0 12px !important;
    color: #122018 !important;
    font-size: 0.92rem !important;
    font-weight: 800 !important;
    line-height: 1.2;
}

#newsfeed-feed-root #poll-correct-select:focus,
.newsfeed-container #poll-correct-select:focus {
    border-color: #00a651;
    box-shadow: 0 0 0 3px rgba(0, 166, 81, 0.14);
    outline: none;
}

#newsfeed-feed-root .poll-options {
    display: grid;
    gap: 8px;
}

#newsfeed-feed-root .post-poll-card {
    margin: 0 14px 12px;
    padding: 14px;
    border: 1px solid #ded7fb;
    border-radius: 16px;
    background: #fbfaff;
}

#newsfeed-feed-root .post-poll-kicker {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    color: #5b35a8;
    font-size: 0.76rem;
    font-weight: 900;
    text-transform: uppercase;
}

#newsfeed-feed-root .post-poll-question {
    color: var(--feed-ink);
    font-size: 0.98rem;
    font-weight: 850;
    line-height: 1.35;
    margin-bottom: 10px;
}

#newsfeed-feed-root .post-poll-options {
    display: grid;
    gap: 8px;
}

#newsfeed-feed-root .post-poll-option {
    position: relative;
    overflow: hidden;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border: 1px solid #dcd6f9;
    border-radius: 12px;
    background: #fff;
    color: #273142;
    padding: 0 12px;
    font-weight: 750;
    text-align: left;
}

#newsfeed-feed-root .post-poll-option.selected {
    border-color: #7c3aed;
    background: #f2eefe;
    color: #4c1d95;
}

#newsfeed-feed-root .post-poll-option.is-correct {
    border-color: #16a34a;
    background: #ecfdf3;
    color: #14532d;
}

#newsfeed-feed-root .post-poll-option.is-wrong {
    border-color: #dc2626;
    background: #fef2f2;
    color: #7f1d1d;
}

#newsfeed-feed-root .post-poll-bar {
    position: absolute;
    inset: 0 auto 0 0;
    z-index: 0;
    background: rgba(124, 58, 237, 0.12);
    pointer-events: none;
}

#newsfeed-feed-root .post-poll-option.is-correct .post-poll-bar {
    background: rgba(22, 163, 74, 0.16);
}

#newsfeed-feed-root .post-poll-option.is-wrong .post-poll-bar {
    background: rgba(220, 38, 38, 0.12);
}

#newsfeed-feed-root .post-poll-option-main,
#newsfeed-feed-root .post-poll-option-meta {
    position: relative;
    z-index: 1;
}

#newsfeed-feed-root .post-poll-option-main {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

#newsfeed-feed-root .post-poll-option-main strong {
    flex: 0 0 auto;
}

#newsfeed-feed-root .post-poll-option-meta {
    display: inline-grid;
    justify-items: end;
    gap: 1px;
    color: #64748b;
    font-size: 0.74rem;
}

#newsfeed-feed-root .post-poll-percent {
    color: inherit;
    font-size: 0.88rem;
    font-weight: 900;
}

#newsfeed-feed-root .post-poll-result,
#newsfeed-feed-root .post-poll-hint,
#newsfeed-feed-root .post-poll-total {
    margin-top: 10px;
    font-size: 0.82rem;
    font-weight: 800;
}

#newsfeed-feed-root .post-poll-result {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

#newsfeed-feed-root .post-poll-result.is-correct {
    color: #15803d;
}

#newsfeed-feed-root .post-poll-result.is-wrong {
    color: #b91c1c;
}

#newsfeed-feed-root .post-poll-result.is-neutral {
    color: #5b35a8;
}

#newsfeed-feed-root .post-poll-hint,
#newsfeed-feed-root .post-poll-total {
    color: #64748b;
}

#newsfeed-feed-root .post-poll-card.is-submitting {
    opacity: 0.72;
    pointer-events: none;
}

#newsfeed-feed-root .create-post-btn:disabled,
#newsfeed-feed-root .create-post-btn[aria-disabled="true"] {
    opacity: 0.58;
    cursor: not-allowed;
    filter: grayscale(0.2);
}

#newsfeed-feed-root .social-action-btn.question {
    color: #0b6f3a;
    background: #eefaf2;
}

@media (max-width: 768px) {
    #newsfeed-feed-root .quick-links-bar {
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        gap: 6px !important;
        overflow: visible !important;
        padding: 6px 10px !important;
        margin-bottom: 0 !important;
        border-bottom: 1px solid var(--feed-line) !important;
    }

    #newsfeed-feed-root .quick-link-btn {
        min-width: 0 !important;
        min-height: 44px !important;
        gap: 5px !important;
        padding: 6px 5px !important;
        border-radius: 12px !important;
        font-size: 0.74rem !important;
        line-height: 1.15 !important;
    }

    #newsfeed-feed-root .quick-link-btn i {
        font-size: 0.9rem !important;
    }

    #newsfeed-feed-root .feed-filter-bar {
        gap: 10px !important;
        padding-inline: 10px !important;
        margin-top: 0 !important;
        scroll-padding-inline: 10px !important;
        scroll-snap-type: x mandatory !important;
    }

    #newsfeed-feed-root .feed-search-filter {
        margin-top: 2px !important;
        margin-bottom: 2px !important;
        min-height: 42px !important;
    }

    #newsfeed-feed-root .feed-filter-chip {
        flex: 0 0 calc((100% - 20px) / 3) !important;
        min-width: 0 !important;
        max-width: calc((100% - 20px) / 3) !important;
        min-height: 44px !important;
        padding: 0 8px !important;
        justify-content: center !important;
        overflow: hidden !important;
    }

    #newsfeed-feed-root .feed-filter-chip i,
    #newsfeed-feed-root .feed-filter-chip span {
        font-size: 0.8rem !important;
    }

    #newsfeed-feed-root .feed-filter-chip span {
        min-width: 0 !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }

    #newsfeed-feed-root .create-post {
        margin-bottom: 6px !important;
    }

    #newsfeed-feed-root .create-post-form {
        padding: 10px 12px 8px !important;
        gap: 8px !important;
    }

    #newsfeed-feed-root .composer-avatar-link,
    #newsfeed-feed-root .composer-avatar {
        width: 44px !important;
        height: 44px !important;
        min-width: 44px !important;
    }

    #newsfeed-feed-root #post-form textarea,
    #newsfeed-feed-root #post-form [name="content"] {
        min-height: 44px !important;
        max-height: 132px !important;
        padding: 11px 12px !important;
        border-radius: 16px !important;
        font-size: 0.95rem !important;
        line-height: 1.35 !important;
    }

    #newsfeed-feed-root .create-post .media-attachment-area {
        margin-top: 0 !important;
        padding: 0 12px 10px !important;
        border-top: 0 !important;
    }

    #newsfeed-feed-root .create-post .media-attachment-bar {
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        gap: 6px !important;
    }

    #newsfeed-feed-root .create-post .social-action-btn {
        min-height: 44px !important;
        padding: 7px 6px !important;
        border-radius: 13px !important;
        font-size: 0.78rem !important;
        line-height: 1.1 !important;
    }

    #newsfeed-feed-root #post-actions-row {
        display: flex !important;
        margin: 0 12px 12px !important;
        padding-top: 8px !important;
    }

    #newsfeed-feed-root #post-actions-row .create-post-btn {
        min-height: 44px !important;
        border-radius: 13px !important;
    }

    #newsfeed-feed-root .post-content {
        padding-bottom: 8px !important;
    }

    #newsfeed-feed-root .post-learning-tags {
        padding: 0 0 10px !important;
    }

    #newsfeed-feed-root .post-poll-card {
        margin: 0 0 10px !important;
    }

    #newsfeed-feed-root .post-media,
    #newsfeed-feed-root .post-video,
    #newsfeed-feed-root .post-gallery {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 0 10px 0 !important;
        border-radius: 12px !important;
        box-sizing: border-box !important;
    }

    #newsfeed-feed-root .post-card img.post-media,
    #newsfeed-feed-root .post-card video.post-video,
    #newsfeed-feed-root .post-card .post-gallery {
        width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
    }

    #newsfeed-feed-root .post-gallery {
        aspect-ratio: auto !important;
        height: auto !important;
        min-height: 0 !important;
        background: transparent !important;
        overflow: hidden !important;
    }

    #newsfeed-feed-root .post-gallery-track {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        min-height: 0 !important;
        overflow-x: auto !important;
        scroll-snap-type: x mandatory;
    }

    #newsfeed-feed-root .post-gallery-slide {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 100% !important;
        flex: 0 0 100% !important;
        height: auto !important;
        min-height: 0 !important;
        scroll-snap-align: center;
    }

    #newsfeed-feed-root .post-gallery-slide img,
    #newsfeed-feed-root img.post-media {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        min-height: 0 !important;
    }

    #newsfeed-feed-root .post-video {
        min-height: 170px !important;
        max-height: min(48svh, 360px) !important;
        object-fit: contain !important;
    }

    #newsfeed-feed-root .post-actions {
        min-height: 52px !important;
        padding: 6px 0 !important;
        gap: 6px !important;
    }

    #newsfeed-feed-root .action-btn {
        min-height: 44px !important;
        border-radius: 12px !important;
        padding: 0 8px !important;
        font-size: 0.83rem !important;
        gap: 6px !important;
    }

    #newsfeed-feed-root .action-btn i {
        font-size: 0.92rem !important;
    }

    #newsfeed-feed-root .action-count {
        min-width: 26px !important;
        height: 26px !important;
        font-size: 0.76rem !important;
    }

    #newsfeed-feed-root .post-poll-card {
        margin: 0 0 8px !important;
        padding: 12px !important;
        border-radius: 14px !important;
    }

    #newsfeed-feed-root .post-poll-kicker {
        margin-bottom: 6px !important;
        font-size: 0.72rem !important;
    }

    #newsfeed-feed-root .post-poll-question {
        margin-bottom: 9px !important;
        font-size: 0.94rem !important;
        line-height: 1.32 !important;
        font-weight: 800 !important;
    }

    #newsfeed-feed-root .post-poll-options {
        gap: 7px !important;
    }

    #newsfeed-feed-root .post-poll-option {
        min-height: 44px !important;
        padding: 0 10px !important;
        border-radius: 11px !important;
        gap: 8px !important;
    }

    #newsfeed-feed-root .post-poll-option-main {
        gap: 7px !important;
        font-size: 0.9rem !important;
        line-height: 1.18 !important;
    }

    #newsfeed-feed-root .post-poll-result,
    #newsfeed-feed-root .post-poll-hint,
    #newsfeed-feed-root .post-poll-total {
        margin-top: 8px !important;
        font-size: 0.78rem !important;
    }

    #newsfeed-feed-root .comment-input {
        min-height: 44px !important;
    }

    #newsfeed-feed-root .comment-submit-btn {
        min-height: 44px !important;
    }
}

@media (min-width: 769px) {
    #newsfeed-feed-root .feed-filter-bar,
    .newsfeed-container .feed-filter-bar,
    .feed-filter-bar {
        display: grid !important;
        grid-template-columns: repeat(6, minmax(0, 1fr)) !important;
        gap: 10px !important;
        overflow: visible !important;
        padding: 10px 16px 12px !important;
        scroll-snap-type: none !important;
    }

    #newsfeed-feed-root .feed-filter-chip,
    .newsfeed-container .feed-filter-chip,
    .feed-filter-chip {
        width: 100% !important;
        min-width: 0 !important;
        max-width: 100% !important;
        min-height: 48px !important;
        padding: 0 10px !important;
        gap: 7px !important;
        overflow: hidden !important;
        text-decoration: none !important;
    }

    #newsfeed-feed-root .feed-filter-chip span,
    .newsfeed-container .feed-filter-chip span,
    .feed-filter-chip span {
        min-width: 0 !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }

    #newsfeed-feed-root .create-post,
    .newsfeed-container .create-post,
    .create-post {
        padding: 18px 16px 20px !important;
    }

    #newsfeed-feed-root .create-post-form,
    .newsfeed-container .create-post-form,
    .create-post-form {
        padding: 0 !important;
        gap: 12px !important;
    }

    #newsfeed-feed-root .create-post .media-attachment-area,
    .newsfeed-container .create-post .media-attachment-area,
    .create-post .media-attachment-area {
        margin-top: 14px !important;
        padding-top: 14px !important;
    }

    #newsfeed-feed-root .create-post .media-attachment-bar,
    .newsfeed-container .create-post .media-attachment-bar,
    .create-post .media-attachment-bar {
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        gap: 10px !important;
        width: 100% !important;
        background: transparent !important;
        border: 0 !important;
        border-radius: 0 !important;
        overflow: visible !important;
    }

    #newsfeed-feed-root .create-post .social-action-btn,
    .newsfeed-container .create-post .social-action-btn,
    .create-post .social-action-btn {
        width: 100% !important;
        min-width: 0 !important;
        min-height: 54px !important;
        padding: 0 12px !important;
        border: 1px solid #dce8df !important;
        border-radius: 999px !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 8px !important;
        white-space: nowrap !important;
        overflow: hidden !important;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    #newsfeed-feed-root.main-container.feed-shell {
        grid-template-columns: minmax(0, 1fr) !important;
    }
}

@media (min-width: 1025px) and (max-width: 1280px) {
    #newsfeed-feed-root.main-container.feed-shell {
        grid-template-columns: 190px minmax(0, 1fr) 240px !important;
        gap: 16px !important;
    }
    
    #newsfeed-feed-root.main-container.feed-shell.guest-layout {
        grid-template-columns: minmax(0, 1fr) 240px !important;
    }

    #newsfeed-feed-root .latest-news-sidebar {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
        pointer-events: auto !important;
        min-width: 0 !important;
        width: 240px !important;
    }

    #newsfeed-feed-root .left-sidebar {
        display: flex !important;
    }

    #newsfeed-feed-root .feed-filter-chip {
        padding: 0 6px !important;
        gap: 4px !important;
    }

    #newsfeed-feed-root .feed-filter-chip i,
    #newsfeed-feed-root .feed-filter-chip span {
        font-size: 0.72rem !important;
    }
}

/* Desktop UX tightening: keep wide screens powerful without turning posts into billboards. */
@media (min-width: 1200px) {
    #newsfeed-feed-root.main-container.feed-shell {
        grid-template-columns: 220px minmax(720px, 800px) minmax(280px, 320px) !important;
        justify-content: center !important;
        align-items: start !important;
        gap: 22px !important;
        max-width: 1400px !important;
        padding-inline: 22px !important;
    }

    #newsfeed-feed-root.main-container.feed-shell.guest-layout {
        grid-template-columns: minmax(720px, 1fr) minmax(280px, 320px) !important;
    }

    #newsfeed-feed-root .newsfeed-container,
    #newsfeed-feed-root .newsfeed-container > .container {
        max-width: 800px !important;
        min-width: 0 !important;
    }
    
    #newsfeed-feed-root.guest-layout .newsfeed-container,
    #newsfeed-feed-root.guest-layout .newsfeed-container > .container {
        max-width: 100% !important;
    }

    #newsfeed-feed-root .newsfeed-container > .container {
        padding-left: 12px !important;
        padding-right: 12px !important;
    }

    #newsfeed-feed-root .left-sidebar,
    #newsfeed-feed-root .latest-news-sidebar {
        max-height: calc(100vh - var(--ilearnzed-navbar-offset, 72px) - 32px) !important;
        overflow-y: auto !important;
        overscroll-behavior: contain !important;
        scrollbar-width: thin !important;
        scrollbar-color: rgba(34, 197, 94, 0.28) transparent !important;
    }

    #newsfeed-feed-root .latest-news-sidebar {
        position: sticky !important;
        top: calc(var(--ilearnzed-navbar-offset, 72px) + 18px) !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 14px !important;
        min-width: 0 !important;
    }

    #newsfeed-feed-root .left-sidebar-card,
    #newsfeed-feed-root .trending-card,
    #newsfeed-feed-root .suggested-card,
    #newsfeed-feed-root .latest-news-section,
    #newsfeed-feed-root .quick-links-bar,
    #newsfeed-feed-root .create-post,
    #newsfeed-feed-root .post-card {
        border-radius: 12px !important;
        box-shadow: 0 8px 20px rgba(20, 59, 33, 0.06), 0 1px 0 rgba(255, 255, 255, 0.72) inset !important;
    }

    #newsfeed-feed-root .hub-profile-card {
        padding: 16px 14px !important;
    }

    #newsfeed-feed-root .hub-profile-avatar {
        width: 72px !important;
        height: 72px !important;
        margin-bottom: 10px !important;
    }

    #newsfeed-feed-root .hub-profile-name {
        font-size: 15px !important;
        margin-bottom: 4px !important;
    }

    #newsfeed-feed-root .hub-profile-role {
        font-size: 12px !important;
    }

    #newsfeed-feed-root .hub-sidebar-divider {
        margin: 12px 0 !important;
    }

    #newsfeed-feed-root .hub-sidebar-stats > div {
        padding: 8px 10px !important;
    }

    #newsfeed-feed-root .sidebar-stat-value {
        font-size: 17px !important;
    }

    #newsfeed-feed-root .hub-nav-list {
        gap: 8px !important;
    }

    #newsfeed-feed-root .hub-nav-link {
        min-height: 42px !important;
        padding: 9px 12px !important;
        border-radius: 10px !important;
    }

    #newsfeed-feed-root .quick-links-bar {
        gap: 10px !important;
        padding: 10px !important;
        margin-bottom: 10px !important;
    }

    #newsfeed-feed-root .quick-link-btn {
        min-height: 46px !important;
        border-radius: 10px !important;
        font-size: 0.82rem !important;
    }

    #newsfeed-feed-root .feed-filter-bar,
    .newsfeed-container .feed-filter-bar,
    .feed-filter-bar {
        grid-template-columns: repeat(5, minmax(0, 1fr)) 124px !important;
        gap: 8px !important;
        padding: 8px 10px !important;
        margin-bottom: 10px !important;
    }

    #newsfeed-feed-root .feed-filter-chip,
    .newsfeed-container .feed-filter-chip,
    .feed-filter-chip {
        min-height: 40px !important;
        padding: 0 9px !important;
        border-radius: 12px !important;
        font-size: 0.8rem !important;
    }

    #newsfeed-feed-root .feed-filter-chip i,
    #newsfeed-feed-root .feed-filter-chip span,
    .newsfeed-container .feed-filter-chip i,
    .newsfeed-container .feed-filter-chip span,
    .feed-filter-chip i,
    .feed-filter-chip span {
        font-size: 0.8rem !important;
    }

    #newsfeed-feed-root .feed-filter-nav-link {
        border-style: dashed !important;
        border-color: #b9d9c5 !important;
        background: #f7fcf9 !important;
        color: #177a44 !important;
        flex-shrink: 0 !important;
    }

    #newsfeed-feed-root .feed-filter-nav-link:hover {
        border-style: solid !important;
        background: #eef9f2 !important;
        color: #0b6f3a !important;
    }

    #newsfeed-feed-root .feed-filter-link-icon {
        font-size: 0.66rem !important;
        opacity: 0.78 !important;
    }

    #newsfeed-feed-root .create-post,
    .newsfeed-container .create-post,
    .create-post {
        padding: 14px !important;
        margin-bottom: 14px !important;
    }

    #newsfeed-feed-root .create-post-form,
    .newsfeed-container .create-post-form,
    .create-post-form {
        gap: 10px !important;
    }

    #newsfeed-feed-root .composer-avatar-link,
    #newsfeed-feed-root .composer-avatar {
        width: 42px !important;
        height: 42px !important;
        min-width: 42px !important;
    }

    #newsfeed-feed-root #post-form textarea,
    #newsfeed-feed-root #post-form [name="content"] {
        min-height: 46px !important;
        padding: 12px 14px !important;
        border-radius: 15px !important;
    }

    #newsfeed-feed-root .post-card {
        padding: 16px !important;
        margin-bottom: 16px !important;
    }

    #newsfeed-feed-root .post-header {
        margin-bottom: 10px !important;
    }

    #newsfeed-feed-root .post-author {
        font-size: 0.96rem !important;
    }

    #newsfeed-feed-root .post-time {
        font-size: 0.78rem !important;
    }

    #newsfeed-feed-root .post-content {
        padding: 0 0 10px !important;
        line-height: 1.55 !important;
    }

    #newsfeed-feed-root .post-media,
    #newsfeed-feed-root .post-video,
    #newsfeed-feed-root .post-gallery {
        max-height: min(66vh, 620px) !important;
        border-radius: 12px !important;
    }

    #newsfeed-feed-root img.post-media,
    #newsfeed-feed-root .post-gallery-slide img {
        max-height: min(66vh, 620px) !important;
        object-fit: contain !important;
    }

    #newsfeed-feed-root .opportunities-widget-card {
        order: 1 !important;
    }

    #newsfeed-feed-root .suggested-card {
        order: 2 !important;
    }

    #newsfeed-feed-root .latest-news-section {
        order: 3 !important;
    }

    #newsfeed-feed-root .trending-card {
        order: 4 !important;
    }

    #newsfeed-feed-root .opportunity-widget-item {
        border-radius: 10px !important;
    }
}

@media (min-width: 1536px) {
    #newsfeed-feed-root.main-container.feed-shell {
        grid-template-columns: 240px minmax(740px, 820px) minmax(300px, 340px) !important;
        max-width: 1460px !important;
        gap: 26px !important;
    }
    
    #newsfeed-feed-root.main-container.feed-shell.guest-layout {
        grid-template-columns: minmax(740px, 1fr) minmax(300px, 340px) !important;
    }

    #newsfeed-feed-root .newsfeed-container,
    #newsfeed-feed-root .newsfeed-container > .container {
        max-width: 820px !important;
    }
    
    #newsfeed-feed-root.guest-layout .newsfeed-container,
    #newsfeed-feed-root.guest-layout .newsfeed-container > .container {
        max-width: 100% !important;
    }
}

/* Phase 4: Academic Interstitials & Offline Caching styles */

/* Offline Banner */
.offline-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: linear-gradient(135deg, #d97706, #b45309);
    color: #ffffff;
    padding: 14px 20px;
    border-radius: 16px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(180, 83, 9, 0.15);
    animation: slideDown 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.offline-banner i {
    font-size: 1.1rem;
}

@keyframes slideDown {
    from {
        transform: translateY(-15px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Toast Notification */
.toast-notification.offline-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fef3c7;
    padding: 14px 24px;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 800;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    animation: toastSlideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.toast-notification.offline-toast i {
    color: #f59e0b;
    font-size: 1.05rem;
}
.toast-notification.offline-toast.fade-out {
    animation: toastFadeOut 0.3s ease forwards;
}

/* Initial page skeleton shell */
#newsfeed-feed-root {
    position: relative;
}
.newsfeed-initial-skeleton {
    display: none;
}
html.newsfeed-loading #newsfeed-feed-root > :not(#newsfeed-initial-skeleton) {
    opacity: 0;
    pointer-events: none;
}
html.newsfeed-loading #newsfeed-initial-skeleton {
    display: grid;
    grid-template-columns: minmax(190px, 300px) minmax(0, 1fr) minmax(230px, 350px);
    gap: 24px;
    position: absolute;
    inset: 0;
    z-index: 20;
    align-items: start;
    background: var(--hub-bg, #f4fbf6);
}

html.newsfeed-loading #newsfeed-feed-root.guest-layout #newsfeed-initial-skeleton {
    grid-template-columns: minmax(0, 1fr) minmax(230px, 350px);
}

html.newsfeed-loading #newsfeed-feed-root.guest-layout .feed-shell-skeleton-left {
    display: none;
}
.feed-shell-skeleton-panel,
.skeleton-composer-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 18px;
    box-shadow: 0 12px 26px rgba(15, 23, 42, 0.05);
}
.feed-shell-skeleton-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.feed-shell-skeleton-left .skeleton-avatar {
    width: 92px;
    height: 92px;
}
.skeleton-sidebar-stats,
.skeleton-composer-actions,
.skeleton-quick-links,
.skeleton-filter-row {
    display: grid;
    gap: 10px;
    width: 100%;
}
.skeleton-sidebar-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 8px 0;
}
.skeleton-mini-card {
    height: 76px;
    border-radius: 12px;
}
.feed-shell-skeleton-main {
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-width: 0;
}
.skeleton-quick-links,
.skeleton-composer-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.skeleton-filter-row {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    background: #ffffff;
    border: 1px solid #e2e8f0;
    padding: 12px 16px;
}
.skeleton-pill,
.skeleton-chip,
.skeleton-composer-input {
    border-radius: 999px;
}
.skeleton-pill {
    height: 52px;
}
.skeleton-chip {
    height: 46px;
}
.skeleton-composer-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.skeleton-composer-input {
    flex: 1;
    height: 72px;
}
.feed-shell-skeleton-right {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.skeleton-opportunity-card {
    min-height: 116px;
    border-radius: 12px;
}

@media (max-width: 1024px) {
    html.newsfeed-loading #newsfeed-initial-skeleton {
        grid-template-columns: minmax(0, 1fr);
        gap: 14px;
    }
    .feed-shell-skeleton-left,
    .feed-shell-skeleton-right {
        display: none;
    }
}

@media (max-width: 768px) {
    html.newsfeed-loading #newsfeed-initial-skeleton {
        inset-inline: 0;
    }
    .skeleton-quick-links {
        display: none;
    }
    .skeleton-filter-row {
        display: flex;
        overflow: hidden;
        padding: 10px 8px;
    }
    .skeleton-chip {
        flex: 0 0 38%;
    }
    .skeleton-composer-card {
        border-radius: 0;
        border-left: 0;
        border-right: 0;
    }
    .skeleton-composer-actions {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .skeleton-pill {
        height: 44px;
    }
}

@keyframes toastSlideUp {
    from {
        transform: translate(-50%, 25px);
        opacity: 0;
    }
    to {
        transform: translate(-50%, 0);
        opacity: 1;
    }
}

@keyframes toastFadeOut {
    to {
        transform: translate(-50%, 15px);
        opacity: 0;
    }
}

/* Mastery Challenge Card */
.mastery-challenge-card {
    border: 1px solid rgba(99, 102, 241, 0.25) !important;
    background: linear-gradient(to bottom, #ffffff, #f9fafb);
    box-shadow: 0 10px 20px -10px rgba(99, 102, 241, 0.12), 0 0 20px 2px rgba(99, 102, 241, 0.05);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}
.mastery-challenge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #6366f1, #a855f7);
}
.mastery-challenge-card.completed {
    border-color: rgba(16, 185, 129, 0.2) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    background: #fbfdfc;
    transition: all 0.4s ease;
}
.mastery-skeleton-header {
    min-height: 86px;
}
.mastery-brain-skeleton {
    display: inline-flex;
    width: 30px;
    height: 30px;
    border-radius: 12px;
}
.mastery-title-skeleton,
.mastery-badge-skeleton,
.mastery-question-skeleton,
.mastery-option-skeleton {
    display: block;
    border-radius: 999px;
}
.mastery-title-skeleton {
    width: 185px;
    height: 18px;
}
.mastery-badge-skeleton {
    width: 116px;
    height: 24px;
}
.mastery-badge-skeleton.is-short {
    width: 82px;
}
.mastery-skeleton-body {
    display: grid;
    gap: 10px;
}
.mastery-question-skeleton {
    width: 92%;
    height: 18px;
}
.mastery-question-skeleton.is-short {
    width: 62%;
    margin-bottom: 4px;
}
.mastery-option-skeleton {
    height: 52px;
    border-radius: 14px;
}

.mastery-card-header {
    padding: 18px 20px 10px;
    border-bottom: 1px solid rgba(241, 245, 249, 0.8);
}
.mastery-title-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}
.mastery-brain-icon {
    font-size: 1.25rem;
    animation: floatBrain 3s ease-in-out infinite;
}
.mastery-title {
    font-size: 0.95rem;
    font-weight: 900;
    background: linear-gradient(90deg, #4f46e5, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.mastery-badge-row {
    display: flex;
    gap: 6px;
}
.mastery-subject-badge {
    background: #eef2ff;
    color: #4f46e5;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 999px;
}
.mastery-topic-badge {
    background: #faf5ff;
    color: #7c3aed;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 999px;
}

.mastery-card-body {
    padding: 16px 20px 20px;
}
.mastery-question {
    font-size: 0.96rem;
    font-weight: 800;
    color: #1e293b;
    line-height: 1.45;
    margin-bottom: 16px;
}

.mastery-options {
    display: grid;
    gap: 10px;
    margin-bottom: 16px;
}
.mastery-option-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid #e2e8f0;
    background: #ffffff;
    border-radius: 14px;
    padding: 12px 14px;
    color: #334155;
    font-weight: 750;
    font-size: 0.88rem;
    text-align: left;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    width: 100%;
}
.mastery-option-btn:hover:not(:disabled) {
    border-color: #cbd5e1;
    background: #f8fafc;
    transform: translateY(-1px);
}
.mastery-option-btn:disabled {
    cursor: default;
}
.mastery-option-btn .option-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: #f1f5f9;
    color: #475569;
    font-size: 0.78rem;
    font-weight: 900;
    flex-shrink: 0;
    transition: all 0.2s ease;
}
.mastery-option-btn:hover:not(:disabled) .option-badge {
    background: #e2e8f0;
    color: #1e293b;
}

/* Option feedback states */
.mastery-option-btn.is-correct {
    border-color: #10b981 !important;
    background: #ecfdf5 !important;
    color: #065f46 !important;
}
.mastery-option-btn.is-correct .option-badge {
    background: #10b981 !important;
    color: #ffffff !important;
}
.mastery-option-btn.is-incorrect {
    border-color: #ef4444 !important;
    background: #fef2f2 !important;
    color: #991b1b !important;
}
.mastery-option-btn.is-incorrect .option-badge {
    background: #ef4444 !important;
    color: #ffffff !important;
}

/* Feedback panel */
.mastery-feedback {
    padding: 14px 16px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    margin-top: 14px;
    animation: fadeInSlideUp 0.3s ease forwards;
}
.mastery-feedback-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 900;
    font-size: 0.92rem;
    margin-bottom: 6px;
}
.mastery-feedback-status.correct {
    color: #10b981;
}
.mastery-feedback-status.incorrect {
    color: #ef4444;
}
.mastery-explanation {
    font-size: 0.84rem;
    font-weight: 700;
    color: #475569;
    line-height: 1.4;
    margin-bottom: 12px;
}
.mastery-feedback-actions {
    display: flex;
    justify-content: flex-end;
}
.mastery-skip-btn {
    border: 0;
    background: transparent;
    color: #64748b;
    min-height: 44px;
    padding: 8px 12px;
    font-weight: 800;
    font-size: 0.82rem;
    cursor: pointer;
    width: 100%;
    border-radius: 10px;
    transition: all 0.2s ease;
}
.mastery-skip-btn:hover,
.mastery-skip-btn:focus-visible {
    color: #4f46e5;
    background: #eef2ff;
    outline: none;
}
.mastery-continue-btn {
    border: 0;
    background: #6366f1;
    color: #ffffff;
    padding: 8px 16px;
    font-weight: 800;
    font-size: 0.8rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}
.mastery-continue-btn:hover {
    background: #4f46e5;
    transform: translateY(-0.5px);
}

@media (max-width: 600px) {
    .mastery-card-header {
        padding: 16px 18px 8px;
    }

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

    .mastery-options {
        gap: 8px;
        margin-bottom: 12px;
    }

    .mastery-option-btn {
        min-height: 48px;
        padding: 10px 12px;
    }

    .mastery-feedback {
        padding: 12px 14px;
        margin-top: 12px;
    }

    .mastery-feedback-actions {
        justify-content: stretch;
    }

    .mastery-skip-btn {
        min-height: 44px;
    }

    .mastery-continue-btn {
        width: 100%;
        min-height: 44px;
    }
}

@keyframes floatBrain {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-3px) rotate(4deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

/* Newsfeed fine-tuning: unify feed surfaces without changing behavior. */
#newsfeed-feed-root {
    --feed-card-radius: 16px;
    --feed-card-border: #dce8df;
    --feed-card-shadow: 0 9px 22px rgba(18, 32, 24, 0.05);
    --feed-card-shadow-soft: 0 5px 16px rgba(18, 32, 24, 0.04);
    --feed-chip-bg: #fbfdfb;
    --feed-control-height: 44px;
}

#newsfeed-feed-root .quick-links-bar,
#newsfeed-feed-root .feed-filter-bar,
#newsfeed-feed-root .create-post,
#newsfeed-feed-root .post-card,
#newsfeed-feed-root .post-poll-card,
#newsfeed-feed-root .poll-composer,
#newsfeed-feed-root .empty-feed-card {
    border-color: var(--feed-card-border) !important;
    box-shadow: var(--feed-card-shadow-soft);
    border-radius: var(--feed-card-radius);
}

#newsfeed-feed-root .quick-links-bar,
#newsfeed-feed-root .feed-filter-bar {
    border-radius: var(--feed-card-radius);
    margin-bottom: 12px;
}

#newsfeed-feed-root .quick-link-btn,
#newsfeed-feed-root .feed-filter-chip,
#newsfeed-feed-root .social-action-btn,
#newsfeed-feed-root .action-btn,
#newsfeed-feed-root .share-post-btn {
    transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

#newsfeed-feed-root .quick-link-btn {
    background: #f8fbf9;
    border: 1px solid var(--feed-card-border);
    color: #1c3929;
}

#newsfeed-feed-root .quick-link-btn:hover,
#newsfeed-feed-root .quick-link-btn:focus-visible {
    background: #eef9f2;
    border-color: rgba(0, 166, 81, 0.22);
    color: var(--feed-green-dark);
    outline: none;
}

#newsfeed-feed-root .feed-filter-chip {
    background: var(--feed-chip-bg);
    min-height: var(--feed-control-height);
}

#newsfeed-feed-root .feed-filter-chip:hover,
#newsfeed-feed-root .feed-filter-chip:focus-visible {
    border-color: rgba(0, 166, 81, 0.28);
    color: var(--feed-green-dark);
    outline: none;
}

#newsfeed-feed-root .feed-filter-chip.active:hover,
#newsfeed-feed-root .feed-filter-chip.active:focus-visible {
    color: #fff;
}

#newsfeed-feed-root .feed-filter-link {
    background: #f9fbfa;
    border-style: dashed;
    color: #365447;
}

#newsfeed-feed-root .feed-filter-link i {
    color: var(--feed-green-dark);
}

#newsfeed-feed-root .create-post {
    border-radius: var(--feed-card-radius);
    box-shadow: var(--feed-card-shadow);
}

#newsfeed-feed-root .create-post:not(.composer-active) {
    box-shadow: var(--feed-card-shadow-soft);
}

#newsfeed-feed-root .create-post:not(.composer-active) .media-attachment-area,
#newsfeed-feed-root .create-post:not(.composer-active) #post-actions-row,
#newsfeed-feed-root .create-post:not(.composer-active) .ask-mode-panel,
#newsfeed-feed-root .create-post:not(.composer-active) .poll-composer {
    display: none !important;
}

#newsfeed-feed-root .create-post:not(.composer-active) #post-form textarea,
#newsfeed-feed-root .create-post:not(.composer-active) #post-form [name="content"] {
    min-height: 48px;
    padding-top: 13px;
    padding-bottom: 13px;
    background: #f8fbf9;
}

#newsfeed-feed-root #post-form textarea,
#newsfeed-feed-root #post-form [name="content"] {
    border-color: var(--feed-card-border);
    background: #fbfdfb;
}

#newsfeed-feed-root #post-form textarea:focus,
#newsfeed-feed-root #post-form [name="content"]:focus {
    border-color: rgba(0, 166, 81, 0.34);
    box-shadow: 0 0 0 3px rgba(0, 166, 81, 0.11);
    outline: none;
}

#newsfeed-feed-root .create-post .social-action-btn {
    background: #f8fbf9 !important;
    color: #214332 !important;
    min-height: var(--feed-control-height) !important;
}

#newsfeed-feed-root .create-post .social-action-btn:hover,
#newsfeed-feed-root .create-post .social-action-btn:focus-visible {
    background: #eef9f2 !important;
    border-color: rgba(0, 166, 81, 0.26) !important;
    color: var(--feed-green-dark) !important;
    outline: none;
}

#newsfeed-feed-root .create-post .social-action-btn.video {
    background: #fff8fa !important;
    color: #9f2146 !important;
    border-color: #f2d5de !important;
}

#newsfeed-feed-root .post-card {
    border-radius: var(--feed-card-radius);
    box-shadow: var(--feed-card-shadow);
}

#newsfeed-feed-root .post-header {
    gap: 10px;
}

#newsfeed-feed-root .post-info {
    gap: 2px;
}

#newsfeed-feed-root .post-content {
    color: #1d2b22;
}

#newsfeed-feed-root .post-learning-tag {
    min-height: 26px;
    background: #f7fbf8;
    border: 1px solid #e5f0e8;
    color: #607366;
    font-size: 0.72rem;
    font-weight: 700;
}

#newsfeed-feed-root .action-btn,
#newsfeed-feed-root .share-post-btn {
    background: #fbfdfb;
    min-width: 0;
}

#newsfeed-feed-root .action-label {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

#newsfeed-feed-root .create-post-btn:disabled,
#newsfeed-feed-root .create-post-btn[aria-disabled="true"] {
    background: #eef4ef !important;
    border-color: #dce8df !important;
    color: #839288 !important;
    opacity: 1;
    filter: none;
}

#newsfeed-feed-root .mastery-challenge-card {
    border-color: rgba(0, 166, 81, 0.22) !important;
    background: linear-gradient(180deg, #ffffff 0%, #fbfdfb 100%);
    box-shadow: var(--feed-card-shadow);
}

#newsfeed-feed-root .mastery-challenge-card[data-rendered="true"] {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    animation: none !important;
}

#newsfeed-feed-root .mastery-challenge-card::before {
    height: 2px;
    background: linear-gradient(90deg, var(--feed-green), rgba(99, 102, 241, 0.58));
}

#newsfeed-feed-root .mastery-card-header {
    padding: 12px 16px 6px;
    background: #ffffff;
}

#newsfeed-feed-root .mastery-brain-icon {
    color: var(--feed-green-dark);
    background: #edf9f2;
}

#newsfeed-feed-root .mastery-title {
    font-size: 0.82rem;
    color: var(--feed-green-dark);
    background: none;
    -webkit-text-fill-color: currentColor;
}

#newsfeed-feed-root .mastery-subject-badge {
    background: #edf9f2;
    color: var(--feed-green-dark);
}

#newsfeed-feed-root .mastery-topic-badge {
    background: #f3f4ff;
    color: #4f46e5;
}

#newsfeed-feed-root .mastery-option-btn {
    border-color: var(--feed-card-border);
    color: #27384b;
    border-radius: 12px;
}

#newsfeed-feed-root .mastery-option-btn:hover:not(:disabled),
#newsfeed-feed-root .mastery-option-btn:focus-visible:not(:disabled) {
    border-color: rgba(0, 166, 81, 0.28);
    background: #f8fbf9;
    outline: none;
}

#newsfeed-feed-root .mastery-skip-btn {
    color: #6b7d70;
    width: auto;
    min-height: 38px;
    padding: 6px 10px;
}

#newsfeed-feed-root .mastery-skip-btn:hover,
#newsfeed-feed-root .mastery-skip-btn:focus-visible {
    color: var(--feed-green-dark);
    background: #edf9f2;
}

#newsfeed-feed-root .skeleton-shimmer {
    background: linear-gradient(90deg, #eef3ef 25%, #f7faf8 38%, #eef3ef 63%) !important;
    background-size: 300% 100% !important;
}

@media (max-width: 768px) {
    #newsfeed-feed-root .quick-links-bar,
    #newsfeed-feed-root .feed-filter-bar {
        border-radius: 0;
        margin-bottom: 8px;
        box-shadow: none;
    }

    #newsfeed-feed-root .quick-links-bar {
        gap: 5px !important;
        padding: 6px 8px !important;
    }

    #newsfeed-feed-root .quick-link-btn {
        min-height: 38px !important;
        padding: 5px 4px !important;
        font-size: 0.7rem !important;
    }

    #newsfeed-feed-root .quick-link-btn i {
        font-size: 0.82rem !important;
    }

    #newsfeed-feed-root .feed-filter-bar {
        gap: 5px;
        padding: 7px 8px 8px;
        scroll-padding-inline: 8px;
    }

    #newsfeed-feed-root .feed-filter-chip {
        min-height: 36px;
        padding: 0 10px;
        gap: 5px;
        font-size: 0.78rem;
    }

    #newsfeed-feed-root .feed-filter-chip i,
    #newsfeed-feed-root .feed-filter-chip span {
        font-size: 0.78rem;
    }

    #newsfeed-feed-root .create-post {
        border-radius: 0;
        box-shadow: none;
    }

    #newsfeed-feed-root .create-post-form {
        padding-bottom: 8px;
    }

    #newsfeed-feed-root .create-post .media-attachment-area {
        padding-bottom: 10px;
    }

    #newsfeed-feed-root .create-post .social-action-btn {
        min-height: 40px !important;
        font-size: 0.84rem !important;
    }

    #newsfeed-feed-root #post-actions-row {
        margin-bottom: 10px;
    }

    #newsfeed-feed-root .post-card {
        border-radius: 0;
        box-shadow: none;
        content-visibility: visible !important;
        contain-intrinsic-size: auto !important;
    }

    #newsfeed-feed-root img.post-media {
        aspect-ratio: auto !important;
        min-height: 0 !important;
        height: auto !important;
        background: transparent !important;
    }

    #newsfeed-feed-root .post-gallery {
        aspect-ratio: auto !important;
        min-height: 0 !important;
        height: auto !important;
        max-height: none !important;
        background: transparent !important;
    }

    #newsfeed-feed-root .post-gallery:not(.has-loaded-image) {
        border-color: transparent !important;
    }

    #newsfeed-feed-root .post-gallery-track,
    #newsfeed-feed-root .post-gallery-slide {
        height: auto !important;
        min-height: 0 !important;
        background: transparent !important;
    }

    #newsfeed-feed-root .post-gallery:not(.has-loaded-image) .post-gallery-slide::before,
    #newsfeed-feed-root .post-gallery:not(.has-loaded-image) .post-gallery-nav,
    #newsfeed-feed-root .post-gallery:not(.has-loaded-image) .post-gallery-count,
    #newsfeed-feed-root .post-gallery:not(.has-loaded-image) .post-gallery-dots {
        display: none !important;
    }

    #newsfeed-feed-root .post-gallery-slide img {
        height: auto !important;
        min-height: 0 !important;
        max-height: min(58svh, 430px) !important;
        background: transparent !important;
    }

    #newsfeed-feed-root .post-actions {
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        min-height: 52px !important;
        padding: 6px 0 !important;
        gap: 6px !important;
    }

    #newsfeed-feed-root .action-btn {
        padding-inline: 6px !important;
        min-height: 44px !important;
        border-radius: 12px !important;
        font-size: 0.83rem !important;
        gap: 6px !important;
    }

    #newsfeed-feed-root .post-learning-tags {
        gap: 6px !important;
        padding: 0 0 8px !important;
        overflow-x: auto !important;
        scrollbar-width: none !important;
    }

    #newsfeed-feed-root .post-learning-tags::-webkit-scrollbar {
        display: none !important;
    }

    #newsfeed-feed-root .post-learning-tag {
        min-height: 24px !important;
        padding: 3px 9px !important;
        font-size: 0.7rem !important;
        white-space: nowrap !important;
        flex: 0 0 auto !important;
    }

    #newsfeed-feed-root .post-poll-card {
        margin: 0 0 8px !important;
        padding: 12px !important;
        border-radius: 14px !important;
    }

    #newsfeed-feed-root .post-poll-question {
        font-size: 0.94rem !important;
        line-height: 1.32 !important;
        font-weight: 800 !important;
    }

    #newsfeed-feed-root .post-poll-option {
        min-height: 44px !important;
        padding: 0 10px !important;
        border-radius: 11px !important;
    }

    #newsfeed-feed-root .mastery-challenge-card {
        border-left: 0 !important;
        border-right: 0 !important;
        border-radius: 0;
        box-shadow: none;
    }

    #newsfeed-feed-root .mastery-card-header {
        padding: 11px 14px 4px;
    }
}

@media (prefers-reduced-motion: reduce) {
    #newsfeed-feed-root .quick-link-btn,
    #newsfeed-feed-root .feed-filter-chip,
    #newsfeed-feed-root .social-action-btn,
    #newsfeed-feed-root .action-btn,
    #newsfeed-feed-root .share-post-btn,
    #newsfeed-feed-root .mastery-challenge-card,
    #newsfeed-feed-root .mastery-brain-icon,
    #newsfeed-feed-root .mastery-option-btn,
    .skeleton-shimmer,
    .offline-banner,
    .toast-notification.offline-toast {
        animation: none !important;
        transition: none !important;
        transform: none !important;
    }
}

@keyframes fadeInSlideUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile QA stabilization: keep the document as the scroll root and contain rails/media. */
@media (max-width: 768px) {
    html,
    html.is-mobile-device,
    html.mobile-forced,
    html.pwa-mobile {
        height: auto !important;
        min-height: 100% !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        overscroll-behavior-y: auto !important;
    }

    body,
    body.is-mobile-device,
    body.mobile-forced,
    body.pwa-mobile {
        height: auto !important;
        min-height: 100svh !important;
        overflow-x: hidden !important;
        overflow-y: visible !important;
        overscroll-behavior-y: auto !important;
    }

    #newsfeed-feed-root,
    #newsfeed-feed-root .newsfeed-container,
    #newsfeed-feed-root .newsfeed-container > .container {
        height: auto !important;
        min-height: 0 !important;
        overflow-x: clip !important;
        overflow-y: visible !important;
        contain: none !important;
    }

    body.is-mobile-device #newsfeed-feed-root *,
    body.mobile-forced #newsfeed-feed-root *,
    html.is-mobile-device #newsfeed-feed-root *,
    html.mobile-forced #newsfeed-feed-root * {
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    #newsfeed-feed-root .feed-filter-bar {
        display: flex !important;
        flex-wrap: nowrap !important;
        align-items: center !important;
        gap: 6px !important;
        width: 100% !important;
        max-width: 100% !important;
        min-height: 60px !important;
        margin: 0 !important;
        padding: 8px 10px !important;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        overscroll-behavior-x: contain !important;
        scroll-snap-type: x proximity !important;
        scroll-padding-inline: 10px !important;
        scrollbar-width: none !important;
        -webkit-overflow-scrolling: touch !important;
        border-radius: 0 !important;
        border-left: 0 !important;
        border-right: 0 !important;
    }

    #newsfeed-feed-root .feed-filter-bar::-webkit-scrollbar {
        display: none !important;
    }

    #newsfeed-feed-root .feed-filter-chip {
        flex: 0 0 auto !important;
        width: auto !important;
        min-width: 68px !important;
        max-width: none !important;
        min-height: 44px !important;
        padding: 0 12px !important;
        gap: 5px !important;
        white-space: nowrap !important;
        justify-content: center !important;
        scroll-snap-align: start !important;
    }

    #newsfeed-feed-root .feed-filter-chip i,
    #newsfeed-feed-root .feed-filter-chip span {
        flex: 0 0 auto !important;
        font-size: 0.8rem !important;
        line-height: 1 !important;
    }

    #newsfeed-feed-root .post-gallery {
        width: 100% !important;
        max-width: 100% !important;
        min-height: 0 !important;
        overflow: hidden !important;
        contain: none !important;
    }

    #newsfeed-feed-root .post-gallery-track {
        display: flex !important;
        width: 100% !important;
        max-width: 100% !important;
        min-height: 0 !important;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        overscroll-behavior-x: contain !important;
        scroll-snap-type: x mandatory !important;
        scrollbar-width: none !important;
        -webkit-overflow-scrolling: touch !important;
    }

    #newsfeed-feed-root .post-gallery-track::-webkit-scrollbar {
        display: none !important;
    }

    #newsfeed-feed-root .post-gallery-slide {
        flex: 0 0 100% !important;
        width: 100% !important;
        min-width: 100% !important;
        max-width: 100% !important;
        min-height: 0 !important;
        overflow: hidden !important;
        scroll-snap-align: center !important;
    }

    #newsfeed-feed-root .post-gallery-slide img,
    #newsfeed-feed-root img.post-media {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        min-height: 0 !important;
        height: auto !important;
        max-height: 78svh !important;
        object-fit: contain !important;
    }

    #newsfeed-feed-root video.post-video {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        min-height: 190px !important;
        height: auto !important;
        max-height: 72svh !important;
        object-fit: contain !important;
    }

    #newsfeed-feed-root .post-card {
        content-visibility: visible !important;
        contain-intrinsic-size: auto !important;
    }
}

/* Feed filter & search zone — reference layout + dark mode */
#newsfeed-feed-root .create-post {
    margin-bottom: 12px;
}

#newsfeed-feed-root .feed-filter-search-zone {
    width: 100%;
    margin: 0 0 16px;
    padding: 0 16px;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    box-sizing: border-box;
}

#newsfeed-feed-root .feed-search-label {
    display: block;
    margin: 0 0 6px;
    font-size: 13px;
    font-weight: 500;
    color: #6b7280;
    letter-spacing: normal;
    text-transform: none;
}

#newsfeed-feed-root .feed-post-search-wrap {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    height: 40px;
    background: #ffffff;
    border: 1.5px solid #e5e7eb;
    border-radius: 8px;
    transition: border-color 200ms ease, box-shadow 200ms ease;
    box-sizing: border-box;
    font-size: 0;
    line-height: 0;
}

#newsfeed-feed-root .feed-post-search-wrap:focus-within {
    border-color: #22c55e;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.12);
}

#newsfeed-feed-root .feed-post-search-icon {
    position: absolute;
    left: 12px;
    color: #9ca3af;
    font-size: 16px;
    line-height: 1;
    pointer-events: none;
}

#newsfeed-feed-root .feed-post-search-input {
    flex: 1;
    width: 100%;
    height: 100%;
    /* !important: beat the global mobile input rule in mobile-responsive.css
       (@media max-width:768px) which forces padding:0.75rem and would push the
       text under the absolutely-positioned search icon. */
    padding: 0 40px 0 38px !important;
    border: 0;
    background: transparent;
    color: #1f2937;
    font-size: 14px;
    font-weight: 400;
    outline: none;
}

#newsfeed-feed-root .feed-post-search-input::placeholder {
    color: #6b7280;
}

#newsfeed-feed-root .feed-post-search-clear {
    position: absolute;
    right: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border: 0;
    border-radius: 50%;
    background: rgba(107, 114, 128, 0.12);
    color: #6b7280;
    cursor: pointer;
    transition: background 200ms ease, color 200ms ease;
}

#newsfeed-feed-root .feed-post-search-clear:hover {
    background: rgba(34, 197, 94, 0.14);
    color: #16a34a;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-bar {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    margin-bottom: 0;
    padding: 0;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    min-height: 0;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-bar::-webkit-scrollbar {
    display: none;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip {
    flex: 0 0 auto;
    min-height: 34px;
    padding: 0 14px;
    gap: 6px;
    border: 1px solid #e5e7eb;
    border-radius: 999px;
    background: #ffffff;
    color: #374151;
    font-size: 13px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    scroll-snap-align: start;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip i,
#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip span {
    font-size: 13px;
    line-height: 1;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip:not(.active):hover,
#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip:not(.active):focus-visible {
    background: #f0fdf4;
    border-color: #e5e7eb;
    color: #374151;
    outline: none;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip.active {
    background: #22c55e;
    border-color: #22c55e;
    color: #ffffff;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip.active:hover,
#newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip.active:focus-visible {
    color: #ffffff;
}

#newsfeed-feed-root .feed-filter-search-zone .feed-filter-link {
    border-style: dashed;
}

#newsfeed-feed-root .feed-search-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 28px 20px;
    gap: 10px;
}

#newsfeed-feed-root .feed-search-empty-icon {
    color: #9ca3af;
    font-size: 32px;
    line-height: 1;
}

#newsfeed-feed-root .feed-search-empty-title {
    margin: 0;
    font-size: 15px;
    font-weight: 500;
    color: #6b7280;
}

#newsfeed-feed-root .feed-search-empty-clear {
    margin-top: 4px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #22c55e;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
}

@media (min-width: 769px) {
    #newsfeed-feed-root .feed-filter-search-zone .feed-filter-bar {
        display: grid;
        grid-template-columns: repeat(6, minmax(0, 1fr));
        gap: 8px;
        overflow: visible;
        scroll-snap-type: none;
    }

    #newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip {
        width: 100%;
        min-width: 0;
        max-width: 100%;
        justify-content: center;
    }
}

[data-theme="dark"] #newsfeed-feed-root {
    color: #cbd5e1;
}

[data-theme="dark"] #newsfeed-feed-root .quick-link-btn {
    background: #1e293b;
    border-color: #334155;
    color: #e2e8f0;
}

[data-theme="dark"] #newsfeed-feed-root .quick-link-btn:hover,
[data-theme="dark"] #newsfeed-feed-root .quick-link-btn:focus-visible {
    background: rgba(21, 128, 61, 0.13);
    border-color: #334155;
    color: #e2e8f0;
}

[data-theme="dark"] #newsfeed-feed-root .create-post {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] #newsfeed-feed-root .create-post:not(.composer-active) #post-form textarea,
[data-theme="dark"] #newsfeed-feed-root .create-post:not(.composer-active) #post-form [name="content"] {
    background: #0f172a;
    border-color: #334155;
    color: #f1f5f9;
}

[data-theme="dark"] #newsfeed-feed-root .create-post:not(.composer-active) #post-form textarea::placeholder,
[data-theme="dark"] #newsfeed-feed-root .create-post:not(.composer-active) #post-form [name="content"]::placeholder {
    color: #64748b;
}

[data-theme="dark"] #newsfeed-feed-root #post-form textarea,
[data-theme="dark"] #newsfeed-feed-root #post-form [name="content"] {
    background: #0f172a;
    border-color: #334155;
    color: #f1f5f9;
}

[data-theme="dark"] #newsfeed-feed-root .feed-search-label {
    color: #94a3b8;
}

[data-theme="dark"] #newsfeed-feed-root .feed-post-search-wrap {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] #newsfeed-feed-root .feed-post-search-wrap:focus-within {
    border-color: #22c55e;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
}

[data-theme="dark"] #newsfeed-feed-root .feed-post-search-icon {
    color: #64748b;
}

[data-theme="dark"] #newsfeed-feed-root .feed-post-search-input {
    color: #f1f5f9;
}

[data-theme="dark"] #newsfeed-feed-root .feed-post-search-input::placeholder {
    color: #64748b;
}

[data-theme="dark"] #newsfeed-feed-root .feed-post-search-clear {
    background: rgba(100, 116, 139, 0.2);
    color: #94a3b8;
}

[data-theme="dark"] #newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip:not(.active) {
    background: #1e293b;
    border-color: #334155;
    color: #cbd5e1;
}

[data-theme="dark"] #newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip:not(.active):hover,
[data-theme="dark"] #newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip:not(.active):focus-visible {
    background: rgba(21, 128, 61, 0.13);
    color: #cbd5e1;
}

[data-theme="dark"] #newsfeed-feed-root .feed-filter-search-zone .feed-filter-chip.active {
    background: #22c55e;
    border-color: #22c55e;
    color: #ffffff;
}

[data-theme="dark"] #newsfeed-feed-root .post-card {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] #newsfeed-feed-root .post-author,
[data-theme="dark"] #newsfeed-feed-root .post-author-name {
    color: #f1f5f9;
}

[data-theme="dark"] #newsfeed-feed-root .post-time,
[data-theme="dark"] #newsfeed-feed-root .post-meta {
    color: #94a3b8;
}

[data-theme="dark"] #newsfeed-feed-root .post-content,
[data-theme="dark"] #newsfeed-feed-root .post-text {
    color: #cbd5e1;
}

[data-theme="dark"] #newsfeed-feed-root .feed-search-empty-icon {
    color: #475569;
}

[data-theme="dark"] #newsfeed-feed-root .feed-search-empty-title {
    color: #64748b;
}

[data-theme="dark"] #newsfeed-feed-root .feed-search-empty-clear {
    color: #22c55e;
}

/* Mobile action bar fit: each Like/Comment/Share button is one third of the
   screen (~96px inner at 360px). Icon + the full "Comment" label + a fixed
   ~26px count pill overflow that, so the label clipped to "Co…" whenever a
   count was present. Slim the count to inline text on narrow screens so the
   word always renders in full. Higher specificity + later source order than
   the earlier action rules, so this wins deterministically. */
@media (max-width: 480px) {
    #newsfeed-feed-root .post-actions .action-btn {
        gap: 5px !important;
        padding: 0 4px !important;
    }

    #newsfeed-feed-root .post-actions .action-btn .action-label {
        overflow: visible !important;
        text-overflow: clip !important;
        flex: 0 1 auto !important;
    }

    #newsfeed-feed-root .post-actions .action-btn .action-count {
        min-width: 0 !important;
        height: auto !important;
        padding: 0 !important;
        background: transparent !important;
        font-size: 0.74rem !important;
        font-weight: 700;
    }

    #newsfeed-feed-root .post-actions .action-btn.liked .action-count,
    #newsfeed-feed-root .post-actions .action-btn.comments-open .action-count {
        background: transparent !important;
    }
}