/* ABOUTME: Styles for the SPARK Resource Explorer frontend. */
/* ABOUTME: Calm, library-like; brand green accents, pale blue-gray pills, 3px radii. */

.spark-re {
    --re-green: #2f6652;
    --re-green-dark: #244f3f;
    --re-panel: #e2ecef;
    --re-panel-border: #a6c2ca;
    --re-surface: #f7f7f7;
    --re-border: #d9d9d9;
    --re-text: #1d2a25;
    --re-text-gray: #4a4a4a;
    --re-muted: #6b7771;
    --re-radius: 3px;

    color: var(--re-text);
    font-size: 16px;
    line-height: 1.5;
    max-width: 1180px;
    margin: 0 auto;
}

.spark-re *,
.spark-re *::before,
.spark-re *::after {
    box-sizing: border-box;
}

/* ---- Search bar ---- */
.spark-re__searchbar {
    position: relative;
    margin-bottom: 22px;
}
.spark-re__search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    width: 20px;
    height: 20px;
    transform: translateY(-50%);
    color: var(--re-muted);
    pointer-events: none;
}
.spark-re__search-input {
    width: 100%;
    padding: 14px 46px 14px 46px;
    font-size: 1rem;
    color: var(--re-text);
    background: #fff;
    border: 1px solid var(--re-border);
    border-radius: var(--re-radius);
    appearance: none;
}
.spark-re__search-input:focus {
    outline: none;
    border-color: var(--re-green);
    box-shadow: 0 0 0 2px rgba(47, 102, 82, 0.18);
}
/* Hide native search clear; we provide our own */
.spark-re__search-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
    appearance: none;
}
.spark-re__search-clear {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--re-muted);
    border-radius: 50%;
}
.spark-re__search-clear:hover {
    background: var(--re-surface);
    color: var(--re-text);
}
.spark-re__search-clear svg {
    width: 16px;
    height: 16px;
}

/* ---- Layout ---- */
.spark-re__layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 36px;
    align-items: start;
}

/* ---- Sidebar ---- */
.spark-re__sidebar {
    position: sticky;
    top: 24px;
    font-size: 0.9rem;
}
.spark-re__placeholder {
    color: var(--re-muted);
}

.spark-re__group {
    border-top: 1px solid var(--re-border);
    padding: 16px 0;
}
.spark-re__group:first-child {
    border-top: none;
    padding-top: 0;
}

/* Staggered load-in once filters arrive */
.spark-re__sidebar[data-ready="true"] .spark-re__group {
    animation: spark-re-fade-up 0.4s ease both;
}
.spark-re__sidebar[data-ready="true"] .spark-re__group:nth-child(2) { animation-delay: 0.06s; }
.spark-re__sidebar[data-ready="true"] .spark-re__group:nth-child(3) { animation-delay: 0.12s; }
@keyframes spark-re-fade-up {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: none; }
}

.spark-re__group-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    padding: 0;
    margin: 0 0 12px;
    cursor: pointer;
    color: var(--re-text);
    text-align: left;
}
.spark-re__group-title {
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--re-text-gray);
}
.spark-re__group-action {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--re-green);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.spark-re__chevron {
    width: 14px;
    height: 14px;
    color: var(--re-muted);
    transition: transform 0.2s ease;
}
.spark-re__group[data-collapsed="true"] .spark-re__group-head .spark-re__chevron {
    transform: rotate(-90deg);
}

/* Animated collapse (grid-rows technique) */
.spark-re__collapse {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.26s ease;
}
.spark-re__collapse.is-open {
    grid-template-rows: 1fr;
}
.spark-re__collapse-inner {
    overflow: hidden;
    min-height: 0;
}

/* Topic tree */
.spark-re__tree,
.spark-re__tree-children {
    list-style: none;
    margin: 0;
    padding: 0;
}
.spark-re__tree li,
.spark-re__tree-children li,
.spark-re__tree-item {
    list-style: none;
    margin: 0;
    padding: 0;
}
.spark-re__tree li::marker,
.spark-re__tree li::before {
    content: none;
}
.spark-re__tree-children {
    margin: 2px 0 6px;
}
.spark-re__parent-row {
    display: flex;
    align-items: center;
    gap: 2px;
}
.spark-re__node {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    border-radius: var(--re-radius);
    padding: 6px 8px;
    cursor: pointer;
    color: var(--re-text);
    font: inherit;
    line-height: 1.3;
}
.spark-re__parent-row .spark-re__node {
    flex: 1 1 auto;
    min-width: 0;
}
/* Growing left accent bar for the active node */
.spark-re__node::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 6px;
    width: 3px;
    border-radius: 2px;
    background: var(--re-green);
    transform: scaleY(0);
    transform-origin: center;
    transition: transform 0.18s ease;
}
.spark-re__node[aria-pressed="true"]::before {
    transform: scaleY(1);
}
.spark-re__node:hover {
    background: var(--re-surface);
}
.spark-re__node[aria-pressed="true"] {
    background: var(--re-panel);
    color: var(--re-green-dark);
    font-weight: 600;
}
.spark-re__node-parent {
    font-weight: 600;
}
.spark-re__node-icon {
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
    color: var(--re-green);
    transition: color 0.15s ease;
}
.spark-re__node-icon svg { width: 16px; height: 16px; display: block; }
.spark-re__node-label {
    flex: 1 1 auto;
    transition: transform 0.15s ease;
}
.spark-re__node:hover .spark-re__node-label {
    transform: translateX(2px);
}
.spark-re__node-child .spark-re__node-label {
    font-weight: 400;
}
.spark-re__node-count {
    flex: 0 0 auto;
    display: inline-block;
    font-size: 0.78rem;
    color: var(--re-muted);
    font-variant-numeric: tabular-nums;
    transition: opacity 0.2s ease, color 0.2s ease;
}
.spark-re__tree-children .spark-re__node {
    padding-left: 30px;
}
.spark-re__node[data-count="0"] {
    opacity: 0.45;
}

/* Expand/collapse toggle for a topic parent */
.spark-re__expand {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--re-muted);
    border-radius: var(--re-radius);
}
.spark-re__expand:hover {
    background: var(--re-surface);
    color: var(--re-text);
}
.spark-re__expand .spark-re__chevron {
    transform: rotate(-90deg);
}
.spark-re__expand[aria-expanded="true"] .spark-re__chevron {
    transform: rotate(0deg);
}

/* Chips (formats + tags) */
.spark-re__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}
.spark-re__chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    background: #fff;
    border: 1px solid var(--re-border);
    border-radius: var(--re-radius);
    cursor: pointer;
    color: var(--re-text);
    font: inherit;
    font-size: 0.82rem;
    line-height: 1.2;
    transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}
.spark-re__chip:hover {
    border-color: var(--re-panel-border);
}
.spark-re__chip[aria-pressed="true"] {
    background: var(--re-green);
    border-color: var(--re-green);
    color: #fff;
}
.spark-re__chip-count {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--re-muted);
    font-variant-numeric: tabular-nums;
    transition: opacity 0.2s ease, color 0.2s ease;
}
.spark-re__chip[aria-pressed="true"] .spark-re__chip-count {
    color: rgba(255, 255, 255, 0.85);
}
.spark-re__chip[data-count="0"] {
    opacity: 0.4;
}

/* Count pulse when facet totals recompute */
.spark-re__node-count.is-bumped,
.spark-re__chip-count.is-bumped {
    animation: spark-re-bump 0.3s ease;
}
@keyframes spark-re-bump {
    0% { transform: scale(1); }
    40% { transform: scale(1.28); }
    100% { transform: scale(1); }
}

.spark-re__tag-filter {
    width: 100%;
    margin-bottom: 10px;
    padding: 7px 10px;
    font-size: 0.82rem;
    border: 1px solid var(--re-border);
    border-radius: var(--re-radius);
}
.spark-re__tag-filter:focus {
    outline: none;
    border-color: var(--re-green);
}
.spark-re__show-more {
    margin-top: 10px;
    padding: 2px 0;
    background: none;
    border: none;
    color: var(--re-green);
    font: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
}
.spark-re__show-more:hover {
    color: var(--re-green-dark);
}

/* ---- Toolbar ---- */
.spark-re__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px 16px;
    margin-bottom: 16px;
}
.spark-re__filters-toggle {
    display: none;
}
.spark-re__count {
    margin: 0;
    color: var(--re-text-gray);
    font-size: 0.95rem;
}
.spark-re__sort {
    display: flex;
    align-items: center;
    gap: 8px;
}
.spark-re__sort-label {
    font-size: 0.85rem;
    color: var(--re-muted);
}
.spark-re__sort-select {
    padding: 7px 28px 7px 10px;
    font-size: 0.88rem;
    border: 1px solid var(--re-border);
    border-radius: var(--re-radius);
    background: #fff;
}

/* ---- Active filters bar ---- */
.spark-re__active {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}
.spark-re__active-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 6px 4px 10px;
    background: var(--re-panel);
    border: 1px solid var(--re-panel-border);
    border-radius: var(--re-radius);
    font-size: 0.8rem;
    color: var(--re-green-dark);
}
.spark-re__active-x {
    display: inline-flex;
    width: 16px;
    height: 16px;
    align-items: center;
    justify-content: center;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--re-green-dark);
    font-size: 1rem;
    line-height: 1;
    border-radius: 2px;
}
.spark-re__active-x:hover {
    background: rgba(47, 102, 82, 0.15);
}
.spark-re__clear-all {
    background: none;
    border: none;
    color: var(--re-green);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
}

/* ---- Results (compact cards) ---- */
.spark-re__results {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 120px;
}

.spark-re__card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 16px;
    background: #fff;
    border: 1px solid var(--re-border);
    border-left: 3px solid var(--re-green);
    border-radius: var(--re-radius);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}
.spark-re__card:hover {
    background: #fcfdfc;
    border-color: var(--re-panel-border);
    border-left-color: var(--re-green-dark);
    box-shadow: 0 2px 10px rgba(29, 42, 37, 0.07);
}
.spark-re__card:focus-visible {
    outline: 2px solid var(--re-green);
    outline-offset: 2px;
}
.spark-re__card-body {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 7px;
}
.spark-re__card-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--re-green);
}
.spark-re__card:hover .spark-re__card-title {
    text-decoration: underline;
    text-underline-offset: 2px;
}
.spark-re__card-desc {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.45;
    color: var(--re-text-gray);
}
.spark-re__card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.spark-re__meta {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 9px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: var(--re-radius);
    background: var(--re-surface);
    color: var(--re-text-gray);
}
.spark-re__meta svg {
    width: 12px;
    height: 12px;
    color: var(--re-muted);
    flex: 0 0 12px;
}
.spark-re__meta--topic {
    background: var(--re-panel);
    color: var(--re-green-dark);
}
.spark-re__meta--topic svg { color: var(--re-green); }
.spark-re__card-chev {
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
    color: var(--re-panel-border);
    transition: transform 0.15s ease, color 0.15s ease;
}
.spark-re__card:hover .spark-re__card-chev {
    color: var(--re-green);
    transform: translateX(3px);
}

/* ---- States ---- */
.spark-re__empty {
    padding: 48px 24px;
    text-align: center;
    color: var(--re-muted);
    background: var(--re-surface);
    border: 1px dashed var(--re-border);
    border-radius: var(--re-radius);
}
.spark-re__skeleton {
    height: 64px;
    background: linear-gradient(90deg, #f4f4f4 25%, #eee 37%, #f4f4f4 63%);
    background-size: 400% 100%;
    animation: spark-re-shimmer 1.3s ease infinite;
    border-radius: var(--re-radius);
}
@keyframes spark-re-shimmer {
    0% { background-position: 100% 0; }
    100% { background-position: 0 0; }
}
.spark-re[data-state="loading"] .spark-re__toolbar,
.spark-re[data-state="loading"] .spark-re__sort {
    opacity: 0.5;
}

.spark-re__more {
    display: flex;
    justify-content: center;
    margin-top: 28px;
}
.spark-re__more-btn {
    padding: 11px 28px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
    background: var(--re-green);
    border: none;
    border-radius: var(--re-radius);
    cursor: pointer;
}
.spark-re__more-btn:hover {
    background: var(--re-green-dark);
}

/* ---- Focus visibility ---- */
.spark-re__node:focus-visible,
.spark-re__chip:focus-visible,
.spark-re__expand:focus-visible,
.spark-re__group-head:focus-visible,
.spark-re__filters-toggle:focus-visible,
.spark-re__show-more:focus-visible {
    outline: 2px solid var(--re-green);
    outline-offset: 2px;
}

/* ---- Responsive ---- */
@media (max-width: 860px) {
    .spark-re__layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .spark-re__sidebar {
        position: static;
        display: none;
        margin-bottom: 4px;
    }
    .spark-re[data-filters-open="true"] .spark-re__sidebar {
        display: block;
        padding: 16px;
        background: var(--re-surface);
        border: 1px solid var(--re-border);
        border-radius: var(--re-radius);
        margin-bottom: 18px;
        animation: spark-re-fade-up 0.25s ease both;
    }
    .spark-re__filters-toggle {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        margin-right: auto;
        padding: 8px 14px;
        background: var(--re-green);
        color: #fff;
        border: none;
        border-radius: var(--re-radius);
        font: inherit;
        font-size: 0.88rem;
        font-weight: 600;
        cursor: pointer;
    }
    .spark-re__filters-toggle svg { width: 16px; height: 16px; }
    .spark-re__filters-count {
        min-width: 18px;
        padding: 1px 6px;
        background: rgba(255, 255, 255, 0.25);
        border-radius: 999px;
        font-size: 0.74rem;
        font-weight: 700;
        text-align: center;
    }
}
@media (prefers-reduced-motion: reduce) {
    .spark-re *,
    .spark-re *::before,
    .spark-re *::after {
        transition: none !important;
        animation: none !important;
    }
}