/* ============================================================
   Quiz Groups + Quiz Feed
   Uses theme variables so light/dark both work automatically.
   ============================================================ */

/* ---------- Page shell ---------- */
.vq-group-page {
    margin-top: 1.5rem;
}

.vq-group-page .vq-search {
    display: flex;
    align-items: center;
    gap: .7rem;
    max-width: 520px;
    padding: .8rem 1.1rem;
    border: 1px solid var(--vq-input-border);
    border-radius: 999px;
    background: var(--vq-input-bg);
    color: var(--vq-muted);
    transition: border-color .18s, box-shadow .18s;
}

.vq-group-page .vq-search:focus-within {
    border-color: var(--md-violet);
    box-shadow: 0 0 0 4px rgba(101, 82, 220, .14);
}

.vq-group-page .vq-search i {
    font-size: .9rem;
    color: var(--md-muted);
}

.vq-group-page .vq-search input {
    flex: 1;
    min-width: 0;
    border: 0;
    background: transparent;
    color: var(--vq-text);
    font: inherit;
    font-size: .9rem;
    outline: none;
}

.vq-group-page .vq-search input::placeholder {
    color: var(--vq-muted);
}

/* ---------- Feed grid ---------- */
.vq-feed {
    display: grid;
    grid-template-columns: 1fr;
    gap: .85rem;
    margin-top: 1.5rem;
}

/* ============================================================
   Tree card — root at the BOTTOM, metric branches ABOVE.
   Animation order: root -> trunk -> spread -> branch lines -> chips
   ============================================================ */
.vq-tree {
    --vq-tree-node: 128px;
    /* Room for a visible two-dot vertical lead-in followed by the wave. */
    --vq-tree-gap: 88px;
    --vq-tree-line: #d9d4ec;
    /* Unitless ms so the feed script can read the same values (getComputedStyle). */
    --vq-tree-chip-base: 1400;
    --vq-tree-stagger: 280;

    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.4rem 1.35rem 1.35rem;
    border: 1px solid var(--md-outline);
    border-radius: 20px;
    background: var(--vq-surface);
    box-shadow: var(--vq-card-shadow);
    transition: border-color .18s, box-shadow .18s, transform .18s;
}

.vq-tree:hover {
    border-color: var(--md-violet);
    box-shadow: var(--vq-card-shadow-hover);
    transform: translateY(-2px);
}

[data-theme="dark"] .vq-tree { --vq-tree-line: #3b3f52; }

/* ---------- Branches (top) ---------- */
.vq-tree__branches {
    display: flex;
    justify-content: space-between;
    /* stretch keeps every chip the same height so the drop lines stay aligned */
    align-items: stretch;
    gap: .4rem;
}

.vq-tree__chip {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .2rem;
    width: var(--vq-tree-node);
    min-height: 92px;
    padding: .55rem .35rem;
    border: 1px solid var(--vq-chip-border);
    border-radius: 14px;
    background: var(--vq-surface-alt);
    text-align: center;
    opacity: 0;
}

.vq-tree__chip::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -5px;
    width: 9px;
    height: 9px;
    border: 2px solid var(--vq-surface);
    border-radius: 50%;
    background: var(--md-violet);
    box-shadow: 0 0 0 1px var(--vq-tree-line);
    transform: translateX(-50%) scale(0);
    transition: transform .25s ease-out;
}

.vq-tree.is-in .vq-tree__chip::after {
    transform: translateX(-50%) scale(1);
    transition-delay: calc((var(--vq-tree-chip-base) + var(--i, 0) * var(--vq-tree-stagger)) * 1ms);
}

.vq-tree__chip i {
    font-size: .78rem;
    color: var(--md-violet);
}

.vq-tree__chip b {
    font-size: 1.02rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--vq-text);
}

.vq-tree__chip small {
    font-size: .66rem;
    font-weight: 700;
    letter-spacing: .03em;
    text-transform: uppercase;
    color: var(--vq-muted);
}

.vq-tree__chip--date b { font-size: .82rem; }
.vq-tree__chip--muted b { color: var(--vq-muted); }

/* "N linked questions" shown beside the Started date */
.vq-tree__chip-aside {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: .25rem;
    width: 100%;
    margin-top: .15rem;
    padding-top: .3rem;
    border-top: 1px dashed var(--vq-chip-border);
    font-size: .58rem;
    font-weight: 700;
    color: var(--vq-muted);
    white-space: nowrap;
}

.vq-tree__chip-aside b {
    font-size: .72rem;
    color: var(--md-violet);
}

/* ---------- Connector wires ----------
   The spine is drawn as SVG (not CSS borders) so it can undulate and curl at
   both ends. JS measures the chips and emits the paths; see drawTreeWires. */
.vq-tree__wires {
    position: absolute;
    inset: 0;
    overflow: visible;
    pointer-events: none;
}

.vq-tree__wires path {
    fill: none;
    stroke: var(--vq-tree-line);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
}

.vq-tree.is-in .vq-tree__wires path {
    animation: vq-tree-draw .55s ease-out both;
    animation-delay: calc(var(--d, 0) * 1ms);
}

/* The final connection is intentionally dotted: it visually carries the
   metric timeline into the launch button without competing with the content. */
.vq-tree__wires path.vq-tree__flow {
    stroke-dasharray: 6 8;
    stroke-dashoffset: 42;
    opacity: 0;
}

.vq-tree.is-in .vq-tree__wires path.vq-tree__flow {
    animation: vq-tree-flow 1.15s cubic-bezier(.2, .8, .25, 1) both;
    animation-delay: .45s;
}

.vq-tree__wires.is-set path.vq-tree__flow {
    stroke-dasharray: 6 8;
    stroke-dashoffset: 0;
    opacity: 1;
}

/* set when wires are (re)drawn after the tree already revealed */
.vq-tree__wires.is-set path {
    animation: none;
    stroke-dashoffset: 0;
}

@keyframes vq-tree-draw {
    to { stroke-dashoffset: 0; }
}

@keyframes vq-tree-flow {
    from { opacity: 0; stroke-dashoffset: 42; }
    to { opacity: 1; stroke-dashoffset: 0; }
}

/* vertical room between the branches and the root for the wave + trunk */
.vq-tree__stem { height: var(--vq-tree-gap); }

/* ---------- Root (bottom) ---------- */
.vq-tree__root {
    /* opaque so it masks the trunk passing behind it */
    background: var(--vq-surface);
    opacity: 0;
}

.vq-tree__head {
    display: flex;
    align-items: flex-start;
    gap: .95rem;
}

.vq-tree__title {
    flex: 1 1 auto;
    min-width: 0;
}

.vq-tree__qcount {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 66px;
    height: 66px;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--md-violet), var(--md-violet-dark));
    color: #fff;
    box-shadow: 0 8px 20px rgba(91, 73, 205, .28);
}

.vq-tree__qcount b {
    font-size: 1.35rem;
    font-weight: 800;
    line-height: 1;
}

.vq-tree__qcount small {
    margin-top: .15rem;
    font-size: .58rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    opacity: .85;
}

.vq-tree__head h2 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 800;
    line-height: 1.32;
    letter-spacing: -.02em;
    color: var(--vq-text);
}

.vq-tree__head h2 a {
    color: inherit;
    text-decoration: none;
}

.vq-tree__head h2 a:hover { color: var(--md-violet); }

.vq-tree__crumbs {
    display: flex;
    align-items: center;
    gap: .35rem;
    flex-wrap: wrap;
    margin: 0 0 .45rem;
    font-size: .72rem;
    font-weight: 700;
}

.vq-tree__crumbs a {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .15rem .45rem;
    border: 1px solid var(--vq-chip-border);
    border-radius: 999px;
    background: var(--vq-chip-bg);
    color: var(--md-violet);
    text-decoration: none;
    transition: background .15s, color .15s;
}

.vq-tree__crumbs a:hover { background: var(--md-violet); color: #fff; }

.vq-tree__crumbs span { color: var(--vq-muted); opacity: .6; }

.vq-tree__desc {
    margin: .7rem 0 0;
    color: var(--vq-muted);
    font-size: .84rem;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.vq-tree__foot {
    position: relative;
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
    margin-top: 1.15rem;
    padding-top: 1.05rem;
}

/* Soft hairline instead of a hard border: it fades out at both ends so it
   reads as a divider, not a line floating with nothing to attach it to. */
.vq-tree__foot::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right,
        transparent,
        var(--vq-chip-border) 18%,
        var(--vq-chip-border) 82%,
        transparent);
}

.vq-tree__tag {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .2rem .5rem;
    border-radius: 999px;
    background: var(--md-surface-tint);
    color: var(--md-violet);
    font-size: .7rem;
    font-weight: 700;
    text-decoration: none;
}

.vq-tree__tag:hover { background: var(--md-violet); color: #fff; }

.vq-tree__tag--public {
    background: rgba(31, 157, 104, .12);
    color: var(--vq-success);
}

/* ---------- CTA (far end of the title row; the wire's terminus) ---------- */
.vq-tree__cta {
    position: relative;
    display: flex;
    flex: 0 0 auto;
    justify-content: flex-end;
    align-self: flex-start;
    gap: .5rem;
    flex-wrap: wrap;
    margin-left: auto;
}

.vq-tree__cta::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    z-index: 2;
    width: 10px;
    height: 10px;
    border: 2px solid var(--vq-surface);
    border-radius: 50%;
    background: var(--md-violet);
    box-shadow: 0 0 0 1px var(--vq-tree-line);
    transform: translate(-50%, -50%) scale(0);
}

.vq-tree.is-in .vq-tree__cta::before {
    animation: vq-tree-button-dot .35s ease-out 1.45s both;
}

.vq-tree__actions {
    display: flex;
    gap: .45rem;
    flex-wrap: wrap;
}

.vq-tree__actions .btn {
    border: 0;
    border-radius: 999px;
    padding: .5rem 1.05rem;
    font-size: .78rem;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    transition: transform .15s, filter .15s, background .15s, color .15s;
}

.vq-tree__actions .btn:hover { transform: translateY(-1px); filter: brightness(1.06); }

.vq-tree__actions .btn-primary { background: var(--md-violet); color: #fff; }

.vq-tree__actions .btn-outline-light {
    border: 1px solid var(--vq-input-border);
    background: transparent;
    color: var(--vq-text);
}

.vq-tree__actions .btn-outline-light:hover {
    border-color: var(--md-violet);
    color: var(--md-violet);
    filter: none;
}

/* ============================================================
   Reveal animation — runs once .is-in is added by IntersectionObserver
   ============================================================ */
@keyframes vq-tree-root-in {
    from { opacity: 0; transform: translateY(16px) scale(.97); }
    to { opacity: 1; transform: none; }
}

@keyframes vq-tree-chip-in {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: none; }
}

@keyframes vq-tree-button-dot {
    from { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    to { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* Slow, deliberate sequence: root -> trunk -> wave -> drop lines -> chips.
   Chip i waits (base + i * stagger) ms; its drop line draws 100ms ahead. */
.vq-tree.is-in .vq-tree__root { animation: vq-tree-root-in .7s cubic-bezier(.2, .8, .25, 1) both; }

.vq-tree.is-in .vq-tree__chip {
    animation: vq-tree-chip-in .5s ease-out both;
    animation-delay: calc((var(--vq-tree-chip-base) + var(--i, 0) * var(--vq-tree-stagger)) * 1ms);
}

@media (prefers-reduced-motion: reduce) {
    .vq-tree__root,
    .vq-tree__chip { opacity: 1; }

    .vq-tree__chip::after { transform: translateX(-50%) scale(1); }
    .vq-tree__cta::before { transform: translate(-50%, -50%) scale(1); }

    .vq-tree.is-in .vq-tree__root,
    .vq-tree.is-in .vq-tree__chip,
    .vq-tree.is-in .vq-tree__wires path { animation: none; }

    .vq-tree__wires path { stroke-dashoffset: 0; }
    .vq-tree__wires path.vq-tree__flow { opacity: 1; }
    .vq-tree:hover { transform: none; }
}

/* ---------- Collapse the tree on small screens ---------- */
@media (max-width: 860px) {
    .vq-tree__branches {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: .5rem;
    }

    .vq-tree__chip { width: auto; min-height: 64px; }
    .vq-tree__wires { display: none; }
    .vq-tree__stem { height: 20px; }
    .vq-tree__chip::after,
    .vq-tree__cta::before { display: none; }
}

@media (max-width: 520px) {
    .vq-tree__branches { grid-template-columns: repeat(2, 1fr); }
    .vq-tree__actions { margin-left: 0; width: 100%; }
    .vq-tree__head { flex-direction: column; align-items: center; text-align: center; }
    .vq-tree__title { width: 100%; }
    .vq-tree__cta { width: 100%; justify-content: center; margin: .35rem 0 0; }
    .vq-tree__actions { justify-content: center; }
}

/* ---------- Status / states ---------- */
.vq-feed-status {
    padding: 1.5rem;
    text-align: center;
    color: var(--vq-muted);
    font-size: .85rem;
    font-weight: 600;
}

.vq-feed-status[hidden] {
    display: none;
}

.vq-feed-empty {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .7rem;
    padding: 3.5rem 1.5rem;
    text-align: center;
    border: 1px dashed var(--vq-input-border);
    border-radius: 20px;
    color: var(--vq-muted);
}

.vq-feed-empty i {
    font-size: 2rem;
    opacity: .45;
}

.vq-feed-empty strong {
    color: var(--vq-text);
    font-size: 1rem;
}

/* ---------- Loading skeletons ---------- */
.vq-feed-skeleton {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: .55rem 1.1rem;
    padding: 1.15rem 1.35rem;
    border: 1px solid var(--md-outline);
    border-radius: 18px;
    background: var(--vq-surface);
}

.vq-feed-skeleton span {
    display: block;
    height: .7rem;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--vq-surface-alt) 25%, var(--vq-input-bg) 50%, var(--vq-surface-alt) 75%);
    background-size: 200% 100%;
    animation: vq-feed-shimmer 1.3s linear infinite;
}

.vq-feed-skeleton span:nth-child(1) { width: 26px; height: 26px; border-radius: 50%; grid-row: 1 / span 3; }
.vq-feed-skeleton span:nth-child(2) { width: 34%; }
.vq-feed-skeleton span:nth-child(3) { width: 55%; height: 1rem; }
.vq-feed-skeleton span:nth-child(4) { width: 28%; }

@keyframes vq-feed-shimmer {
    from { background-position: 200% 0; }
    to { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
    .vq-feed-skeleton span { animation: none; }
    .vq-feed-card:hover { transform: none; }
}

/* Stack the row into a single column on small screens */
@media (max-width: 700px) {
    .vq-feed-card {
        grid-template-columns: auto 1fr;
    }

    .vq-feed-card__actions {
        grid-column: 2;
        grid-row: auto;
        flex-direction: row;
        flex-wrap: wrap;
        margin: .7rem 0 0;
    }
}

/* ============================================================
   Group directory / details (shares the same theme variables)
   ============================================================ */
.vq-group-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
}

.vq-group-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 240px;
    padding: 1.25rem;
    border: 1px solid var(--md-outline);
    border-radius: 22px;
    background: var(--vq-surface);
    color: var(--vq-text);
    text-decoration: none;
    box-shadow: var(--vq-card-shadow);
    transition: transform .18s, box-shadow .18s, border-color .18s;
}

.vq-group-card:hover {
    transform: translateY(-3px);
    border-color: var(--md-violet);
    box-shadow: var(--vq-card-shadow-hover);
}

.vq-group-card h2,
.vq-group-card h3 {
    margin: 0;
    color: var(--vq-text);
    font-size: 1.1rem;
    line-height: 1.35;
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.vq-group-card p {
    margin: 0;
    color: var(--vq-muted);
    font-size: .9rem;
    line-height: 1.55;
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.vq-group-stats,
.vq-group-card__footer {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    color: var(--md-violet);
    font-size: .85rem;
    font-weight: 700;
}

.vq-group-card__content {
    display: flex;
    flex-direction: column;
    gap: .65rem;
    min-width: 0;
}

.vq-group-card__footer {
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: .85rem;
    border-top: 1px solid var(--md-outline);
}

.vq-group-card__footer .btn {
    padding: .55rem .85rem;
    white-space: nowrap;
}

.vq-group-card__meta {
    color: var(--vq-muted);
    white-space: nowrap;
}

/* Group directory cards intentionally mirror the landing-page category cards. */
.vq-group-card--directory {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 1rem;
    min-height: 240px;
    overflow: hidden;
    padding: 1.35rem;
    border-radius: 26px;
    background: var(--md-surface-tint);
}

.vq-group-card--directory:nth-child(4n + 2) { background: #e3f5ff; }
.vq-group-card--directory:nth-child(4n + 3) { background: #e0f7ef; }
.vq-group-card--directory:nth-child(4n + 4) { background: #fff1d0; }

.vq-group-card--directory::after {
    content: "";
    position: absolute;
    right: -75px;
    bottom: -90px;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .55);
}

.vq-group-card__icon {
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    border-radius: 19px;
    color: #fff;
    background: #6350d1;
    box-shadow: 0 12px 25px rgba(86, 68, 193, .24);
}

.vq-group-card--directory:nth-child(4n + 2) .vq-group-card__icon { background: #287aae; }
.vq-group-card--directory:nth-child(4n + 3) .vq-group-card__icon { background: #26816d; }
.vq-group-card--directory:nth-child(4n + 4) .vq-group-card__icon { background: #a66e09; }

.vq-group-card__body {
    display: block;
    min-width: 0;
}

.vq-group-card__body small,
.vq-group-card__body strong,
.vq-group-card__body em,
.vq-group-card__summary {
    display: block;
}

.vq-group-card__body small {
    margin-bottom: .3rem;
    color: var(--md-muted);
    font-size: .64rem;
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.vq-group-card__body strong {
    color: var(--vq-text);
    font-size: 1.08rem;
    line-height: 1.35;
    letter-spacing: -.025em;
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.vq-group-card__summary {
    margin-top: .4rem;
    overflow: hidden;
    color: var(--vq-muted);
    font-size: .76rem;
    line-height: 1.45;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.vq-group-card__body em {
    margin-top: .45rem;
    color: var(--vq-muted);
    font-size: .72rem;
    font-style: normal;
    font-weight: 700;
}

.vq-group-card__arrow {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    color: #4f43a1;
    background: rgba(255, 255, 255, .72);
}

[data-theme="dark"] .vq-group-card--directory {
    background: color-mix(in srgb, var(--vq-surface) 88%, #6552dc 12%);
}

[data-theme="dark"] .vq-group-card--directory:nth-child(4n + 2) {
    background: color-mix(in srgb, var(--vq-surface) 88%, #287aae 12%);
}

[data-theme="dark"] .vq-group-card--directory:nth-child(4n + 3) {
    background: color-mix(in srgb, var(--vq-surface) 88%, #26816d 12%);
}

[data-theme="dark"] .vq-group-card--directory:nth-child(4n + 4) {
    background: color-mix(in srgb, var(--vq-surface) 88%, #a66e09 12%);
}

[data-theme="dark"] .vq-group-card--directory::after { background: rgba(255, 255, 255, .035); }

.vq-join-form {
    display: flex;
    gap: .75rem;
    max-width: 520px;
    margin-bottom: 1.5rem;
}

.vq-group-description {
    margin: 1.5rem 0;
    padding: 1.4rem;
    border: 1px solid var(--md-outline);
    border-radius: 20px;
    background: var(--vq-surface);
    color: var(--vq-text);
}

.vq-group-description img {
    max-width: 100%;
    height: auto;
}

.vq-locked {
    color: var(--vq-muted);
    font-weight: 700;
}

@media (max-width: 1200px) {
    .vq-group-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
    .vq-group-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .vq-feed { grid-template-columns: 1fr; }
}

@media (max-width: 576px) {
    .vq-join-form { flex-direction: column; }
    .vq-group-grid { grid-template-columns: 1fr; }
    .vq-group-card { min-height: 220px; }
    .vq-group-card--directory {
        grid-template-columns: auto minmax(0, 1fr) auto;
        min-height: 170px;
        padding: 1.1rem;
        border-radius: 22px;
    }

    .vq-group-card__icon {
        width: 50px;
        height: 50px;
        border-radius: 17px;
    }
}