// components/gallery.el - "Things Neuron Said" gallery page.
// Per-card auth-gated voting via supabase-js + /api/vote.

// gallery_share_allowlist — same allowlist as default_share_allowlist in
// main.el. Inlined here so this component is self-contained: the build
// concat order puts gallery.el before main.el, so a top-level reference to
// main.el's binding would forward-reference at the C level. The DB column
// is already sanitized at write time; this is belt-and-braces in case a
// row was inserted out-of-band.
// NOTE: <a> is intentionally excluded. Gallery cards wrap their content in
// <a class="gal-link"> — allowing <a> in sanitized answer HTML causes nested
// anchors, which the HTML5 parser resolves via the adoption agency algorithm,
// producing mismatched </div> tags that break gallery-grid's closing tag and
// pull sibling elements into the grid as spurious grid items.

extern fn el_html_doc(lang: String, head_html: String, body_html: String) -> String
extern fn el_meta_charset(charset: String) -> String
extern fn el_meta(name: String, content: String) -> String
extern fn el_link_stylesheet(href: String) -> String
extern fn el_title(text: String) -> String
extern fn el_script_src(src: String, defer_load: Bool) -> String
extern fn el_script_inline(js: String) -> String
extern fn el_div(attrs: String, children: String) -> String
extern fn el_nav(attrs: String, children: String) -> String
extern fn el_a(href: String, attrs: String, children: String) -> String
extern fn el_img(src: String, alt: String, attrs: String) -> String
extern fn el_button(attrs: String, label: String) -> String
extern fn el_span(attrs: String, children: String) -> String
extern fn el_p(attrs: String, children: String) -> String
extern fn el_h1(attrs: String, text: String) -> String
extern fn el_h2(attrs: String, text: String) -> String
extern fn el_input(type_attr: String, attrs: String) -> String
extern fn el_br() -> String

fn gallery_css_base() -> String {
    "*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #FAFAF8; --bg2: #F0F0EC; --card: #FFFFFF;
  --navy: #0052A0; --navy-65: rgba(0,82,160,.65); --navy-85: rgba(0,82,160,.85);
  --t1: #0D0D14; --t2: #3A3A4A; --t3: #6B6B7E;
  --border: rgba(0,0,0,.07); --border2: rgba(0,0,0,.13);
  --up: #2E7D32; --down: #C62828;
  --head: 'Playfair Display', Georgia, serif;
  --body: 'IBM Plex Sans', system-ui, sans-serif;
}
html { scroll-behavior: smooth; }
html, body { background: var(--bg); color: var(--t1); font-family: var(--body); -webkit-font-smoothing: antialiased; }
body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image: linear-gradient(rgba(0,0,0,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.022) 1px, transparent 1px);
  background-size: 48px 48px;
}
.label { font-family: var(--body); font-size: .75rem; font-weight: 500; letter-spacing: .2em; text-transform: uppercase; color: var(--navy-65); }
.display-lg { font-family: var(--head); font-size: clamp(2rem,4vw,3.25rem); font-weight: 600; line-height: 1.1; letter-spacing: -.02em; color: var(--t1); }
.btn-primary { display: inline-flex; align-items: center; gap: .75rem; font-family: var(--body); font-size: .75rem; font-weight: 500; letter-spacing: .15em; text-transform: uppercase; text-decoration: none; color: #fff; background: var(--navy); padding: 1rem 2rem; border: none; cursor: pointer; transition: background 300ms; }
.btn-primary:hover { background: #0078D4; }
.btn-ghost { display: inline-flex; align-items: center; gap: .75rem; font-family: var(--body); font-size: .75rem; font-weight: 400; letter-spacing: .15em; text-transform: uppercase; text-decoration: none; color: var(--t2); background: transparent; padding: 1rem 2rem; border: 1px solid var(--border2); cursor: pointer; transition: border-color 300ms, color 300ms; }
.btn-ghost:hover { border-color: rgba(0,82,160,.35); color: var(--t1); }"
}

fn gallery_css_nav() -> String {
    "#nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; transition: background 500ms, border-color 500ms; }
#nav.scrolled { background: rgba(250,250,248,.95); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1280px; margin: 0 auto; padding: 0 2rem; height: 4rem; display: flex; align-items: center; justify-content: space-between; position: relative; }
.nav-logo img { height: 2rem; width: auto; display: block; }
.nav-links { display: flex; align-items: center; gap: 1.25rem; flex-wrap: nowrap; }
.nav-link { font-family: var(--body); font-size: .675rem; font-weight: 400; letter-spacing: .16em; text-transform: uppercase; color: var(--t3); text-decoration: none; white-space: nowrap; transition: color 200ms; }
.nav-link:hover { color: var(--t1); }
.nav-dropdown { position: relative; display: flex; align-items: center; }
.nav-dropdown-btn { background: none; border: none; cursor: pointer; padding: 0; font-family: var(--body); font-size: .675rem; font-weight: 400; letter-spacing: .16em; text-transform: uppercase; color: var(--t3); transition: color 200ms; white-space: nowrap; }
.nav-dropdown-btn:hover { color: var(--t1); }
.nav-dropdown-menu { display: none; position: absolute; top: calc(100% + .75rem); left: 50%; transform: translateX(-50%); background: #fff; border: 1px solid var(--border2); box-shadow: 0 8px 32px rgba(0,0,0,.10); min-width: 160px; flex-direction: column; z-index: 200; padding: .375rem 0; }
.nav-dropdown.open .nav-dropdown-menu { display: flex; }
.nav-dropdown-item { font-family: var(--body); font-size: .8125rem; font-weight: 400; color: var(--t2); text-decoration: none; padding: .5rem 1.25rem; transition: background 150ms, color 150ms; white-space: nowrap; }
.nav-dropdown-item:hover { background: var(--bg2); color: var(--t1); }
.nav-cta { font-family: var(--body); font-size: .675rem; font-weight: 500; letter-spacing: .15em; text-transform: uppercase; color: #fff; background: var(--navy); text-decoration: none; padding: .575rem 1.1rem; white-space: nowrap; box-shadow: 0 2px 12px rgba(0,82,160,.20); transition: background 300ms; }
.nav-cta:hover { background: #0078D4; }
.nav-hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px 4px; z-index: 101; -webkit-tap-highlight-color: transparent; }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--t1); border-radius: 1px; transition: transform 280ms ease, opacity 200ms ease; transform-origin: center; }
.nav-hamburger[aria-expanded=\"true\"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger[aria-expanded=\"true\"] span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger[aria-expanded=\"true\"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-mobile { display: none; position: absolute; top: 4rem; left: 0; right: 0; background: rgba(250,250,248,.98); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); padding: .5rem 0 1.5rem; flex-direction: column; box-shadow: 0 8px 32px rgba(0,0,0,.08); }
.nav-mobile.open { display: flex; }
.nav-mobile-link { display: block; padding: .875rem 2rem; font-family: var(--body); font-size: .75rem; font-weight: 400; letter-spacing: .16em; text-transform: uppercase; color: var(--t2); text-decoration: none; border-bottom: 1px solid rgba(0,0,0,.05); transition: color 150ms, background 150ms; }
.nav-mobile-link:last-child { border-bottom: none; }
.nav-mobile-link:hover { color: var(--t1); background: rgba(0,82,160,.03); }
.nav-mobile-cta { display: block; margin: 1rem 2rem 0; padding: .8rem 1.5rem; text-align: center; font-family: var(--body); font-size: .75rem; font-weight: 500; letter-spacing: .15em; text-transform: uppercase; color: #fff; background: var(--navy); text-decoration: none; }
@media (max-width: 1060px) { .nav-links { display: none; } .nav-hamburger { display: flex; } }
@media (min-width: 1061px) { .nav-mobile { display: none !important; } .nav-hamburger { display: none !important; } }"
}

fn gallery_css_gallery() -> String {
    ".gallery-wrap { max-width: 1100px; margin: 0 auto; padding: 7rem 2.5rem 5rem; position: relative; z-index: 1; }
.gallery-header { margin-bottom: 3rem; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
@media (max-width: 900px) { .gallery-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .gallery-grid { grid-template-columns: 1fr; } }
.gal-card { background: var(--card); border: 1px solid var(--border); padding: 1.5rem; display: flex; flex-direction: column; gap: .875rem; transition: border-color .15s, box-shadow .15s; }
.gal-card:hover { border-color: rgba(0,82,160,.25); box-shadow: 0 4px 20px rgba(0,82,160,.07); }
.gal-link { text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: .875rem; flex: 1; }
.gal-q { font-family: var(--body); font-weight: 500; font-size: .875rem; color: var(--navy); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.gal-a { font-family: var(--body); font-weight: 300; font-size: .8125rem; color: var(--t2); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 6; -webkit-box-orient: vertical; overflow: hidden; flex: 1; max-height: 11rem; }
.gal-a p { margin: 0; }
.gal-a p + p { margin-top: .35rem; }
.gal-a ol, .gal-a ul { padding-left: 1.25rem; margin: .25rem 0; }
.gal-a li + li { margin-top: .15rem; }
.gal-a strong { font-weight: 600; color: var(--t1); }
.gal-a em { font-style: italic; }
.gal-a code { background: rgba(0,0,0,0.05); padding: .1em .3em; border-radius: 3px; font-family: ui-monospace, 'IBM Plex Mono', Menlo, monospace; font-size: .85em; }
.gal-a pre { background: var(--bg2); padding: .5rem; overflow-x: auto; font-size: .75rem; margin: .4rem 0; border-radius: 3px; }
.gal-a pre code { background: none; padding: 0; }
.gal-a a { color: var(--navy); text-decoration: underline; }
.gal-a h1, .gal-a h2, .gal-a h3, .gal-a h4 { font-size: 1em; font-weight: 600; margin: .3rem 0; color: var(--t1); }
.gal-a blockquote { border-left: 2px solid var(--border2); padding-left: .5rem; color: var(--t2); margin: .3rem 0; }
.gal-a img { max-width: 100%; height: auto; }
.gal-meta { display: flex; justify-content: space-between; align-items: center; font-family: var(--body); font-size: .65rem; font-weight: 400; letter-spacing: .1em; text-transform: uppercase; color: var(--t3); margin-top: auto; padding-top: .75rem; border-top: 1px solid var(--border); }
.gal-date { font-size: .65rem; color: var(--t3); }
.vote-controls { display: inline-flex; align-items: center; gap: .35rem; }
.vote-btn { background: transparent; border: 1px solid var(--border2); color: var(--t3); cursor: pointer; padding: .2rem .45rem; font-size: .7rem; line-height: 1; transition: all .15s; -webkit-tap-highlight-color: transparent; }
.vote-btn:hover:not(:disabled) { color: var(--navy); border-color: rgba(0,82,160,.35); background: rgba(0,82,160,.04); }
.vote-btn:focus-visible { outline: 2px solid var(--navy); outline-offset: 1px; }
.vote-btn:disabled { opacity: .55; cursor: not-allowed; }
.vote-btn.is-active.vote-up { background: rgba(46,125,50,.10); color: var(--up); border-color: rgba(46,125,50,.45); }
.vote-btn.is-active.vote-down { background: rgba(198,40,40,.10); color: var(--down); border-color: rgba(198,40,40,.45); }
.vote-btn.is-loading { opacity: .55; cursor: wait; }
.vote-score { font-size: .8rem; font-weight: 500; color: var(--t1); min-width: 1.5rem; text-align: center; font-variant-numeric: tabular-nums; }
.gallery-controls { display: flex; align-items: center; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.gallery-search { flex: 1; min-width: 200px; font-family: var(--body); font-size: .875rem; font-weight: 300; color: var(--t1); background: #fff; border: 1px solid var(--border2); padding: .625rem 1rem; outline: none; transition: border-color .2s; }
.gallery-search:focus { border-color: var(--navy); }
.gallery-search::placeholder { color: var(--t3); }
.sort-btn { font-family: var(--body); font-size: .7rem; font-weight: 400; letter-spacing: .1em; text-transform: uppercase; color: var(--t3); background: none; border: 1px solid var(--border2); padding: .5rem 1rem; cursor: pointer; transition: all .15s; }
.sort-btn:hover, .sort-btn.active { color: var(--navy); border-color: rgba(0,82,160,.3); background: rgba(0,82,160,.03); }
.gallery-empty { grid-column: 1/-1; padding: 4rem 0; text-align: center; }
.gal-card.hidden { display: none; }"
}

fn gallery_css_modal() -> String {
    ".signin-modal { position: fixed; inset: 0; background: rgba(13,13,20,.55); display: none; align-items: center; justify-content: center; z-index: 1000; padding: 1rem; }
.signin-modal.open { display: flex; }
.signin-modal-card { background: #fff; border: 1px solid var(--border2); padding: 2rem; max-width: 22rem; width: 100%; box-shadow: 0 16px 48px rgba(0,0,0,.18); }
.signin-modal h2 { font-family: var(--head); font-size: 1.4rem; font-weight: 600; color: var(--t1); margin-bottom: .5rem; }
.signin-modal p { font-family: var(--body); font-size: .85rem; font-weight: 300; color: var(--t2); line-height: 1.6; margin-bottom: 1.25rem; }
.signin-modal input { width: 100%; box-sizing: border-box; font-family: var(--body); font-size: .875rem; font-weight: 300; color: var(--t1); background: #fff; border: 1px solid var(--border2); padding: .75rem 1rem; outline: none; transition: border-color .2s; margin-bottom: .75rem; }
.signin-modal input:focus { border-color: var(--navy); }
.signin-modal-actions { display: flex; gap: .5rem; justify-content: space-between; align-items: center; }
.signin-modal-msg { font-size: .8rem; color: var(--t2); margin-top: .75rem; min-height: 1rem; }
.signin-modal .btn-primary { padding: .7rem 1.25rem; font-size: .7rem; }
.signin-modal-cancel { background: none; border: none; color: var(--t3); cursor: pointer; font-family: var(--body); font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; padding: .7rem .5rem; }
.signin-modal-cancel:hover { color: var(--t1); }"
}

fn gallery_nav_html() -> String {
    let logo_img: String = el_img(
        "/assets/brand/neuron-wordmark-on-light.png",
        "Neuron",
        "srcset=\"/assets/brand/neuron-wordmark-on-light@2x.png 2x\" height=\"28\""
    )
    let logo: String = el_a("/", "class=\"nav-logo\" aria-label=\"Neuron home\"", logo_img)

    let dropdown_menu: String = el_div(
        "class=\"nav-dropdown-menu\"",
        el_a("/#mission", "class=\"nav-dropdown-item\"", "Our mission") +
        el_a("/#safety", "class=\"nav-dropdown-item\"", "Safety") +
        el_a("/#environmental", "class=\"nav-dropdown-item\"", "Environment")
    )
    let dropdown: String = el_div(
        "class=\"nav-dropdown\"",
        el_button("class=\"nav-link nav-dropdown-btn\" aria-haspopup=\"true\" aria-expanded=\"false\"", "Mission &#9662;") +
        dropdown_menu
    )

    let nav_links: String = el_div(
        "class=\"nav-links\"",
        el_a("/#how-it-works", "class=\"nav-link\"", "How it works") +
        dropdown +
        el_a("/#pricing", "class=\"nav-link\"", "Pricing") +
        el_a("/#marketplace", "class=\"nav-link\"", "Marketplace") +
        el_a("/#enterprise", "class=\"nav-link\"", "Enterprise") +
        el_a("/about", "class=\"nav-link\"", "About") +
        el_a("/said", "class=\"nav-link\"", "Gallery") +
        el_a("/account", "class=\"nav-link\"", "Account") +
        el_a("/#pricing", "class=\"nav-cta\"", "Get Access")
    )

    let hamburger: String = el_button(
        "class=\"nav-hamburger\" id=\"nav-hamburger\" aria-label=\"Open navigation\" aria-expanded=\"false\" aria-controls=\"nav-mobile\"",
        el_span("", "") + el_span("", "") + el_span("", "")
    )

    let nav_mobile: String = el_div(
        "class=\"nav-mobile\" id=\"nav-mobile\" role=\"navigation\" aria-label=\"Mobile navigation\"",
        el_a("/#how-it-works", "class=\"nav-mobile-link\"", "How it works") +
        el_a("/#mission", "class=\"nav-mobile-link\"", "Mission") +
        el_a("/#safety", "class=\"nav-mobile-link\" style=\"padding-left:1.75rem;font-size:.8rem;color:var(--t3)\"", "- Safety") +
        el_a("/#environmental", "class=\"nav-mobile-link\" style=\"padding-left:1.75rem;font-size:.8rem;color:var(--t3)\"", "- Environment") +
        el_a("/#pricing", "class=\"nav-mobile-link\"", "Pricing") +
        el_a("/#enterprise", "class=\"nav-mobile-link\"", "Enterprise") +
        el_a("/about", "class=\"nav-mobile-link\"", "About") +
        el_a("/said", "class=\"nav-mobile-link\"", "Gallery") +
        el_a("/account", "class=\"nav-mobile-link\"", "Account") +
        el_a("/#pricing", "class=\"nav-mobile-cta\"", "Get Access")
    )

    el_nav("id=\"nav\"", el_div("class=\"nav-inner\"", logo + nav_links + hamburger + nav_mobile))
}

fn gallery_page(cards_json: String, supabase_url: String, supabase_anon_key: String) -> String {
    // Moved from module-level to avoid duplicate main() when linked with other modules.
    let gallery_share_allowlist: String = "{\"p\":[],\"br\":[],\"strong\":[],\"em\":[],\"u\":[],\"s\":[],\"code\":[],\"pre\":[],\"ul\":[],\"ol\":[],\"li\":[],\"h1\":[],\"h2\":[],\"h3\":[],\"h4\":[],\"blockquote\":[]}"
    let i: Int = 0
    let cards_html: String = ""
    let n: Int = json_array_len(cards_json)
    while i < n {
        let card: String = json_array_get(cards_json, i)
        let cid:   String = json_get(card, "id")
        let cq:    String = json_get(card, "question")
        let ca:    String = json_get(card, "answer")
        let ca_html_raw: String = json_get(card, "answer_html")
        let score_raw: String = json_get(card, "score")
        let score: String = if str_eq(score_raw, "") { "0" } else { score_raw }
        let q_html: String = str_replace(str_replace(str_replace(cq, "&", "&amp;"), "<", "&lt;"), ">", "&gt;")
        // a_html: prefer the marked.js-rendered HTML (run through the
        // same sanitizer the share page uses) so the gallery preview
        // matches /share/<id>. Cap at 600 rendered chars so the card
        // stays the right visual height. Legacy rows (answer_html null)
        // fall back to escaped plaintext.
        // json_get returns the literal string "null" for JSON null cells
        // (which is how legacy rows surface answer_html). Treat both empty
        // and "null" as the no-html fallback.
        let has_html: Bool = !str_eq(ca_html_raw, "") && !str_eq(ca_html_raw, "null")
        let a_html: String = if !has_html {
            str_replace(str_replace(str_replace(ca, "&", "&amp;"), "<", "&lt;"), ">", "&gt;")
        } else {
            let s: String = el_html_sanitize(ca_html_raw, gallery_share_allowlist)
            if str_len(s) > 600 { str_slice(s, 0, 600) + "..." } else { s }
        }
        let ts_raw: String = json_get(card, "created_at")
        let ts_short: String = str_slice(ts_raw, 0, 10)
        let card_html: String = "<div class=\"gal-card\" data-share-id=\"" + cid + "\" data-score=\"" + score + "\" data-ts=\"" + cid + "\">" +
            "<a href=\"/share/" + cid + "\" class=\"gal-link\">" +
            "<div class=\"gal-q\">" + q_html + "</div>" +
            "<div class=\"gal-a\">" + a_html + "</div>" +
            "</a>" +
            "<div class=\"gal-meta\">" +
            "<div class=\"vote-controls\" data-share-id=\"" + cid + "\">" +
            "<button type=\"button\" class=\"vote-btn vote-up\" aria-label=\"Upvote\" data-direction=\"up\" disabled>&#9650;</button>" +
            "<span class=\"vote-score\" data-score=\"" + score + "\">" + score + "</span>" +
            "<button type=\"button\" class=\"vote-btn vote-down\" aria-label=\"Downvote\" data-direction=\"down\" disabled>&#9660;</button>" +
            "</div>" +
            "<span class=\"gal-date\">" + ts_short + " &#183; Read &#8599;</span>" +
            "</div>" +
            "</div>"
        let cards_html = cards_html + card_html
        let i = i + 1
    }
    let empty_html: String = if str_eq(cards_html, "") {
        "<div style=\"grid-column:1/-1;padding:4rem 0;text-align:center\"><p class=\"label\" style=\"margin-bottom:1rem\">Nothing yet</p><p style=\"font-family:var(--body);font-weight:300;color:var(--t2);line-height:1.7\">Nothing shared yet.</p></div>"
    } else { "" }

    let all_css: String = gallery_css_base() + gallery_css_nav() + gallery_css_gallery() + gallery_css_modal()
    let style_block: String = "<style>" + all_css + "</style>"

    let head_html: String =
        el_meta_charset("UTF-8") +
        "<meta name=\"viewport\" content=\"width=device-width,initial-scale=1\">" +
        el_title("Things Neuron Said") +
        el_meta("description", "Real conversations with Neuron, voted up by users.") +
        "<link rel=\"icon\" type=\"image/png\" sizes=\"32x32\" href=\"/assets/favicon-32.png\">" +
        "<link rel=\"preconnect\" href=\"https://fonts.googleapis.com\">" +
        "<link rel=\"preconnect\" href=\"https://fonts.gstatic.com\" crossorigin>" +
        "<link href=\"https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;1,400&family=IBM+Plex+Sans:wght@300;400;500;600&display=swap\" rel=\"stylesheet\">" +
        style_block

    let sort_controls: String = el_div(
        "style=\"display:flex;gap:.5rem;flex-shrink:0\"",
        el_button("class=\"sort-btn active\" id=\"sort-top\" onclick=\"setSort('top',this)\"", "Top") +
        el_button("class=\"sort-btn\" id=\"sort-new\" onclick=\"setSort('new',this)\"", "Newest")
    )
    let gallery_controls: String = el_div(
        "class=\"gallery-controls\"",
        el_input("search", "id=\"gal-search\" class=\"gallery-search\" placeholder=\"Search conversations...\" autocomplete=\"off\"") +
        sort_controls
    )

    let no_results: String = el_div(
        "id=\"no-results\" style=\"display:none;padding:3rem 0;text-align:center\"",
        el_p("style=\"font-family:var(--body);font-weight:300;color:var(--t3)\"", "No conversations match that search.")
    )

    let gallery_header: String = el_div(
        "class=\"gallery-header\"",
        el_p("class=\"label\" style=\"margin-bottom:1rem\"", "Things Neuron Said") +
        el_h1("class=\"display-lg\" style=\"margin-bottom:1rem\"", "Real conversations." + el_br() + "No curation.") +
        el_p("style=\"font-family:var(--body);font-weight:300;font-size:.9375rem;color:var(--t2);line-height:1.75;max-width:36rem\"",
            "People chatted with Neuron and shared the exchanges that mattered. Voted up by readers. The best ones rise."
        )
    )

    let gallery_grid: String = el_div("class=\"gallery-grid\" id=\"gallery-grid\"", cards_html + empty_html)

    let gallery_wrap: String = el_div(
        "class=\"gallery-wrap\"",
        gallery_header + gallery_controls + gallery_grid + no_results +
        el_div("style=\"margin-top:3rem\"", el_a("/", "class=\"btn-ghost\"", "&#8592; Back to site"))
    )

    let signin_modal: String = el_div(
        "class=\"signin-modal\" id=\"signin-modal\" role=\"dialog\" aria-modal=\"true\" aria-labelledby=\"signin-title\"",
        el_div(
            "class=\"signin-modal-card\"",
            el_h2("id=\"signin-title\"", "Sign in to vote") +
            el_p("", "We will email you a sign-in link. No password needed.") +
            el_input("email", "id=\"signin-email\" placeholder=\"your@email.com\" autocomplete=\"email\"") +
            el_div(
                "class=\"signin-modal-actions\"",
                el_button("type=\"button\" class=\"signin-modal-cancel\" id=\"signin-cancel\"", "Cancel") +
                el_button("type=\"button\" class=\"btn-primary\" id=\"signin-send\"", "Send link")
            ) +
            el_p("class=\"signin-modal-msg\" id=\"signin-msg\"", "")
        )
    )

    let cfg_js: String = "window.NEURON_CFG=window.NEURON_CFG||{};window.NEURON_CFG.supabase_url=\"" + supabase_url + "\";window.NEURON_CFG.supabase_anon_key=\"" + supabase_anon_key + "\";"

    let body_html: String =
        gallery_nav_html() +
        gallery_wrap +
        signin_modal +
        "<script src=\"https://cdn.jsdelivr.net/npm/@supabase/supabase-js@2/dist/umd/supabase.min.js\"></script>" +
        el_script_inline(cfg_js) +
        el_script_src("/js/gallery.js", true)

    el_html_doc("en", head_html, body_html)
}