/* ==========================================================================
   Scientific poster gallery (posters/) - gallery grid + poster viewer page.
   Brand green #8ab92d is used for decoration only; text and buttons use the
   deeper #3f6212 so they meet WCAG AA contrast on white.
   ========================================================================== */
:root{
    --pg-ink:#14202e;
    --pg-text:#344052;
    --pg-muted:#5b6573;
    --pg-line:#e3e7ec;
    --pg-bg:#f5f7f9;
    --pg-card:#ffffff;
    --pg-brand:#8ab92d;
    --pg-brand-ink:#3f6212;
    --pg-brand-ink-hover:#33500e;
    --pg-brand-tint:#f1f7e4;
    /* The site's own light-green CTA colour (matches the "Register Here" button
       in the nav) - used for primary buttons like "View Poster", kept separate
       from --pg-brand-ink above, which stays the deeper shade text and icons
       need for WCAG-AA contrast on white. */
    --pg-brand-btn:#8ab92d;
    --pg-brand-btn-hover:#7aa628;
    --pg-feat:#9a4d06;
    --pg-feat-tint:#fff6e8;
    --pg-radius:10px;
    --pg-serif:"Source Serif 4","Source Serif Pro",Georgia,"Times New Roman",serif;
    --pg-sans:Poppins,"Segoe UI",system-ui,-apple-system,sans-serif;
    --pg-shadow:0 1px 2px rgba(20,32,46,.06),0 4px 14px rgba(20,32,46,.05);
    --pg-shadow-hover:0 2px 4px rgba(20,32,46,.06),0 14px 30px rgba(20,32,46,.10);
}

.pg-section{background:var(--pg-bg);padding:48px 0 80px}
/* Component display rules must never un-hide something the script hid. */
[hidden]{display:none!important}
.pg-sr{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- Compact heading (replaces the full green hero on the gallery,
   so posters get the vertical space instead). #header is position:fixed, so
   this supplies its own top padding to clear it. ---------- */
.pg-topbar{background:#fff;border-bottom:1px solid var(--pg-line);padding:108px 0 20px;text-align:center}
.pg-crumbs{font:600 11.5px/1 var(--pg-sans);letter-spacing:1.5px;text-transform:uppercase;color:var(--pg-muted);margin:0 0 10px}
.pg-crumbs a{color:var(--pg-muted);text-decoration:none}
.pg-crumbs a:hover{color:var(--pg-brand-ink);text-decoration:underline}
.pg-crumbs i{font-size:10px;margin:0 2px}
.pg-topbar h1{font:700 30px/1.25 var(--pg-sans);color:var(--pg-ink);margin:0}
@media (max-width:768px){
    .pg-topbar{padding:92px 0 16px}
    .pg-topbar h1{font-size:24px}
}

/* ---------- Buttons ---------- */
.pg-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:8px;border:1px solid var(--pg-line);background:#fff;color:var(--pg-ink);font:600 13.5px/1.2 var(--pg-sans);text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s,color .15s,box-shadow .15s;white-space:nowrap}
.pg-btn:hover{border-color:#c5ccd5;background:#f8fafb;color:var(--pg-ink);text-decoration:none}
.pg-btn-primary{background:var(--pg-brand-btn);border-color:var(--pg-brand-btn);color:#fff}
.pg-btn-primary:hover{background:var(--pg-brand-btn-hover);border-color:var(--pg-brand-btn-hover);color:#fff}
.pg-btn-ghost{background:transparent;border-color:transparent;color:var(--pg-brand-ink)}
.pg-btn-ghost:hover{background:var(--pg-brand-tint);border-color:transparent;color:var(--pg-brand-ink)}
.pg-btn:focus-visible,.pg-card a:focus-visible,.pg-field input:focus-visible,.pg-field select:focus-visible,.pv-tool:focus-visible,.pv-top a:focus-visible{outline:3px solid #1d4ed8;outline-offset:2px}
.pg-btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------- Toolbar: search + filters ---------- */
.pg-toolbar{background:#fff;border:1px solid var(--pg-line);border-radius:14px;padding:20px;box-shadow:var(--pg-shadow);margin-bottom:28px}
.pg-search{position:relative;margin-bottom:14px}
.pg-search i{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--pg-muted);font-size:16px;pointer-events:none}
.pg-search input{width:100%;height:52px;border:1px solid #cfd6de;border-radius:10px;padding:0 16px 0 44px;font:400 15px var(--pg-sans);color:var(--pg-ink);background:#fbfcfd;transition:border-color .15s,box-shadow .15s,background .15s}
.pg-search input::placeholder{color:#7a8491}
.pg-search input:focus{outline:none;border-color:var(--pg-brand-ink);background:#fff;box-shadow:0 0 0 3px rgba(63,98,18,.15)}
.pg-filters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;align-items:end}
.pg-field label{display:block;font:600 11px/1 var(--pg-sans);letter-spacing:1px;text-transform:uppercase;color:var(--pg-muted);margin:0 0 6px}
.pg-field select{width:100%;height:44px;border:1px solid #cfd6de;border-radius:8px;padding:0 34px 0 12px;font:400 13.5px var(--pg-sans);color:var(--pg-ink);background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235b6573' d='M6 8 0 1.4 1.4 0 6 4.8 10.6 0 12 1.4z'/%3E%3C/svg%3E") no-repeat right 12px center;-webkit-appearance:none;appearance:none;cursor:pointer}
.pg-field select:focus{outline:none;border-color:var(--pg-brand-ink);box-shadow:0 0 0 3px rgba(63,98,18,.15)}
.pg-field select.is-set{border-color:var(--pg-brand-ink);background-color:var(--pg-brand-tint)}
.pg-summary{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:16px;padding-top:14px;border-top:1px solid var(--pg-line)}
.pg-count{font:500 14px var(--pg-sans);color:var(--pg-text);margin:0}
.pg-count strong{color:var(--pg-ink)}
.pg-submit{display:none}
html:not(.pg-js) .pg-submit{display:inline-flex}

/* ---------- Section headings ---------- */
.pg-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 0 16px}
.pg-heading h2{font:600 22px/1.25 var(--pg-serif);color:var(--pg-ink);margin:0}
.pg-heading p{margin:0;color:var(--pg-muted);font-size:13.5px}

/* ---------- Featured ---------- */
.pg-featured{margin-bottom:40px}
.pg-featured .pg-heading h2 i{color:var(--pg-feat);font-size:17px;margin-right:6px}
.pg-card.is-featured{border-color:#f0d5a8}
.pg-feat-badge{position:absolute;top:10px;right:10px;background:var(--pg-feat-tint);color:var(--pg-feat);font:700 10.5px/1 var(--pg-sans);letter-spacing:1px;text-transform:uppercase;padding:6px 8px;border-radius:6px;border:1px solid #f0d5a8}

/* ---------- Grid + cards ---------- */
.pg-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:22px;list-style:none;margin:0;padding:0}
.pg-grid > li{display:flex;min-width:0}
.pg-card{position:relative;display:flex;flex-direction:column;width:100%;background:var(--pg-card);border:1px solid var(--pg-line);border-radius:var(--pg-radius);overflow:hidden;box-shadow:var(--pg-shadow);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease}
.pg-card:hover{box-shadow:var(--pg-shadow-hover);transform:translateY(-2px)}
.pg-thumb{position:relative;display:block;aspect-ratio:3/4;background:linear-gradient(180deg,#eef1f4,#e6eaee);border-bottom:1px solid var(--pg-line);overflow:hidden}
.pg-thumb img{position:absolute;inset:10px;width:calc(100% - 20px);height:calc(100% - 20px);object-fit:contain;filter:drop-shadow(0 2px 6px rgba(20,32,46,.14));transition:transform .35s ease,opacity .3s ease}
.pg-thumb img[data-loading]{opacity:0}
.pg-card:hover .pg-thumb img{transform:scale(1.02)}
.pg-thumb-ph{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#8a95a3;font:600 13px var(--pg-sans)}
.pg-thumb-ph i{font-size:40px;color:#b7c0ca}
.pg-body{display:flex;flex-direction:column;gap:8px;padding:16px 16px 18px;flex:1}
.pg-title{font:600 17px/1.35 var(--pg-serif);color:var(--pg-ink);margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.pg-title a{color:inherit;text-decoration:none}
.pg-title a::after{content:"";position:absolute;inset:0;z-index:0}
.pg-title a:hover{color:var(--pg-brand-ink)}
.pg-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:8px;position:relative;z-index:1}
.pg-actions .pg-btn{flex:1 1 auto;padding:10px 12px}
.pg-card .pg-feat-badge{z-index:1}

.pg-more{display:flex;justify-content:center;margin-top:32px}
.pg-sentinel{height:1px}

/* ---------- Empty state ---------- */
.pg-empty{max-width:520px;margin:30px auto;text-align:center;background:#fff;border:1px solid var(--pg-line);border-radius:14px;padding:44px 28px;box-shadow:var(--pg-shadow)}
.pg-empty i{font-size:42px;color:#b7c0ca;display:block;margin-bottom:14px}
.pg-empty h2{font:600 19px/1.4 var(--pg-serif);color:var(--pg-ink);margin:0 0 8px}
.pg-empty p{color:var(--pg-muted);margin:0 0 18px;font-size:14px}

/* ---------- Gallery responsive ---------- */
@media (max-width:991px){
    .pg-filters{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
    .pg-section{padding:28px 0 56px}
    .pg-toolbar{padding:14px;border-radius:12px}
    .pg-filters{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .pg-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .pg-body{padding:12px 12px 14px;gap:6px}
    .pg-title{font-size:15px}
    .pg-actions{flex-direction:column}
    .pg-actions .pg-btn{width:100%}
    .pg-heading h2{font-size:19px}
}
@media (max-width:419px){
    .pg-grid{grid-template-columns:1fr}
    .pg-actions{flex-direction:row}
}

@media (prefers-reduced-motion:reduce){
    .pg-card,.pg-thumb img,.pg-btn{transition:none}
    .pg-card:hover{transform:none}
    .pg-card:hover .pg-thumb img{transform:none}
}

/* ==========================================================================
   Poster page (viewer + details)
   ========================================================================== */
body.pv-body{margin:0;background:var(--pg-bg);font-family:var(--pg-sans);color:var(--pg-text)}
.pv-skip{position:absolute;left:-9999px;top:0;background:#fff;color:var(--pg-ink);padding:10px 14px;z-index:100;border-radius:0 0 8px 0}
.pv-skip:focus{left:0}
.pv-top{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--pg-line);box-shadow:0 1px 6px rgba(20,32,46,.04)}
.pv-top-in{display:flex;align-items:center;justify-content:space-between;gap:12px;max-width:1400px;margin:0 auto;padding:8px 16px;min-height:60px}
.pv-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--pg-ink);min-width:0}
.pv-brand img{height:40px;width:auto}
.pv-brand span{font:700 13px/1.2 var(--pg-sans);white-space:nowrap}
.pv-brand small{display:block;font-weight:500;color:var(--pg-muted);font-size:11.5px}
.pv-brand:hover{text-decoration:none;color:var(--pg-ink)}
.pv-nav{display:flex;align-items:center;gap:6px}
.pv-nav a{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 12px;border-radius:8px;color:var(--pg-ink);font:600 13px var(--pg-sans);text-decoration:none}
.pv-nav a:hover{background:var(--pg-bg);text-decoration:none;color:var(--pg-ink)}

.pv-draft{background:#fff4d6;color:#7a4b00;border-bottom:1px solid #f0d68a;text-align:center;font-size:13px;padding:8px 16px}

.pv-stage{background:#e9edf1;border-bottom:1px solid var(--pg-line)}
.pv-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;max-width:1400px;margin:0 auto;padding:12px 16px}
.pv-id{display:flex;align-items:center;min-width:0}
.pv-id h1{font:600 19px/1.3 var(--pg-serif);color:var(--pg-ink);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pv-id p{margin:3px 0 0;font-size:13px;color:var(--pg-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pv-tools{display:flex;align-items:center;gap:4px;flex-shrink:0;background:#fff;border:1px solid var(--pg-line);border-radius:10px;padding:4px}
.pv-tool{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;height:44px;padding:0 10px;border:0;border-radius:7px;background:transparent;color:var(--pg-ink);font:600 13px var(--pg-sans);cursor:pointer;text-decoration:none}
.pv-tool:hover{background:var(--pg-bg);color:var(--pg-ink);text-decoration:none}
.pv-tool[aria-pressed="true"]{background:var(--pg-brand-tint);color:var(--pg-brand-ink)}
.pv-tool.pv-dl{background:var(--pg-brand-ink);color:#fff}
.pv-tool.pv-dl:hover{background:var(--pg-brand-ink-hover);color:#fff}
.pv-zoom-val{min-width:56px;font-variant-numeric:tabular-nums}
.pv-sep{width:1px;height:26px;background:var(--pg-line);margin:0 2px}

.pv-canvas-wrap{position:relative;height:calc(100vh - 150px);height:calc(100dvh - 150px);min-height:420px;overflow:auto;display:flex;outline:none;touch-action:pan-x pan-y;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;cursor:grab}
.pv-canvas-wrap.is-dragging{cursor:grabbing;user-select:none}
.pv-canvas-wrap:focus-visible{box-shadow:inset 0 0 0 3px #1d4ed8}
.pv-pages{margin:auto;padding:16px;display:flex;flex-direction:column;align-items:center;gap:16px;transform-origin:0 0}
.pv-page{position:relative;background:#fff;box-shadow:0 2px 6px rgba(20,32,46,.12),0 12px 36px rgba(20,32,46,.12);flex-shrink:0}
.pv-page canvas{position:absolute;left:0;top:0;width:100%;height:100%;display:block}
.pv-page canvas.pv-detail{width:auto;height:auto}
.pv-placeholder{display:block;max-width:calc(100vw - 32px);max-height:calc(100dvh - 190px);width:auto;height:auto;box-shadow:0 2px 6px rgba(20,32,46,.12),0 12px 36px rgba(20,32,46,.12);background:#fff}
.pv-status{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);background:rgba(20,32,46,.86);color:#fff;font-size:13px;padding:9px 14px;border-radius:8px;pointer-events:none;display:flex;align-items:center;gap:8px;white-space:nowrap}
.pv-status[hidden]{display:none}
.pv-error{margin:auto;max-width:460px;text-align:center;background:#fff;border-radius:12px;padding:32px 26px;box-shadow:var(--pg-shadow)}
.pv-error h2{font:600 18px var(--pg-serif);color:var(--pg-ink);margin:0 0 8px}
.pv-error p{font-size:14px;color:var(--pg-muted);margin:0 0 16px}

/* Full screen: native (:fullscreen) or the CSS fallback used on iPhone. */
.pv-stage:fullscreen{background:#1b2430;display:flex;flex-direction:column}
.pv-stage.pv-pseudo-fs{position:fixed;inset:0;z-index:1000;background:#1b2430;display:flex;flex-direction:column}
.pv-stage:fullscreen .pv-bar,.pv-stage.pv-pseudo-fs .pv-bar{max-width:none;width:100%;background:#fff}
.pv-stage:fullscreen .pv-canvas-wrap,.pv-stage.pv-pseudo-fs .pv-canvas-wrap{flex:1;height:auto;min-height:0}
body.pv-noscroll{overflow:hidden}

/* ---------- Details: a single "Poster information" card ---------- */
.pv-details{max-width:780px;margin:0 auto;padding:40px 16px 20px}
.pv-block{background:#fff;border:1px solid var(--pg-line);border-radius:14px;padding:26px;box-shadow:var(--pg-shadow);margin-bottom:24px}
.pv-block h2{font:600 20px/1.3 var(--pg-serif);color:var(--pg-ink);margin:0 0 14px}
.pv-info{display:grid;grid-template-columns:auto 1fr;gap:10px 16px;margin:0;font-size:14px}
.pv-info dt{color:var(--pg-muted);font-weight:500}
.pv-info dd{margin:0;color:var(--pg-ink);font-weight:500;min-width:0;overflow-wrap:anywhere}
.pv-actions{display:flex;flex-direction:column;gap:10px;margin-top:20px}

.pv-foot{border-top:1px solid var(--pg-line);background:#fff;text-align:center;font-size:13px;color:var(--pg-muted);padding:22px 16px}
.pv-foot a{color:var(--pg-brand-ink)}

@media (max-width:991px){
    .pv-details{padding-top:28px}
}
@media (max-width:767px){
    .pv-brand span{display:none}
    .pv-nav a .lbl{display:none}
    .pv-bar{flex-direction:column;align-items:stretch;gap:10px;padding:10px 12px}
    .pv-id h1{font-size:16px;-webkit-line-clamp:2}
    .pv-tools{justify-content:space-between}
    .pv-tool .lbl{display:none}
    .pv-tools{gap:2px}
    .pv-tool{flex:1 1 0;min-width:0;padding:0}
    .pv-sep{display:none}
    .pv-canvas-wrap{height:calc(100vh - 210px);height:calc(100dvh - 210px);min-height:360px}
    .pv-pages{padding:10px}
    .pv-block{padding:20px;border-radius:12px}
}
@media print{
    .pv-top,.pv-stage,.pv-actions,.pv-foot{display:none!important}
    .pv-details{display:block}
    .pv-block{box-shadow:none;border:0;padding:0}
}