/**
 * SchoolDXP Page turner — public viewer.
 *
 * Inherits the school's theme: fonts are inherited, colours come from the
 * per-publication accent (--sdxp-pt-accent), then the forms module's detected
 * accent (--schooldxp-form-accent), then the block theme's palette, then a
 * neutral ink. Nothing here uses WordPress admin blue.
 *
 * The .stf__* rules are StPageFlip's own stylesheet (MIT), which its browser
 * build doesn't inject.
 */
.sdxp-pt {
    --pt-accent: var(--sdxp-pt-accent, var(--schooldxp-form-accent, var(--wp--preset--color--primary, #1d2327)));
    --pt-on-accent: var(--schooldxp-form-accent-text, #ffffff);
    --pt-ink: var(--wp--preset--color--contrast, #1d2327);
    --pt-muted: color-mix(in srgb, var(--pt-ink) 62%, transparent);
    --pt-surface: var(--wp--preset--color--base, #ffffff);
    --pt-stage: color-mix(in srgb, var(--pt-ink) 5%, var(--pt-surface));
    --pt-line: color-mix(in srgb, var(--pt-ink) 14%, transparent);
    --pt-radius: 10px;
    position: relative;
    margin: 1.5em 0;
    max-width: 100%;
    font: inherit;
    color: var(--pt-ink);
}
.sdxp-pt *, .sdxp-pt *::before, .sdxp-pt *::after { box-sizing: border-box; }
.sdxp-pt button, .sdxp-pt input, .sdxp-pt select { font: inherit; color: inherit; }
.sdxp-pt :focus-visible { outline: 3px solid var(--pt-accent); outline-offset: 2px; }

/* Stage: book, skeleton and the gate share one grid cell so the stage grows to fit whichever is taller. */
.sdxp-pt-stage {
    position: relative;
    display: grid;
    align-items: center;
    background: var(--pt-stage);
    border-radius: var(--pt-radius);
    padding: 18px 0;
    overflow: hidden;
}
.sdxp-pt-stage > * { grid-area: 1 / 1; min-width: 0; }
.sdxp-pt-stage:focus { outline: none; }
.sdxp-pt-stage:focus-visible { outline: 3px solid var(--pt-accent); outline-offset: 2px; }

/* Skeleton: the cover at its final size, before PDF.js has loaded. */
.sdxp-pt-skeleton { display: flex; align-items: center; justify-content: center; position: relative; min-height: 220px; }
.sdxp-pt-sk-page {
    position: relative; overflow: hidden; width: min(100%, 420px); aspect-ratio: 1 / var(--sdxp-pt-ratio, 1.4142);
    background: linear-gradient(110deg, #ececea 8%, #f6f6f4 18%, #ececea 33%); background-size: 200% 100%;
    animation: sdxp-pt-shimmer 1.4s linear infinite;
    box-shadow: 0 1px 2px rgba(0, 0, 0, .08), 0 8px 24px rgba(0, 0, 0, .10);
    border-radius: 2px 4px 4px 2px;
}
.sdxp-pt-skeleton.is-spread .sdxp-pt-sk-page { transform: translateX(50%); }
.sdxp-pt-sk-cover { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
@keyframes sdxp-pt-shimmer { to { background-position-x: -200%; } }

.sdxp-pt-loading {
    position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%);
    width: min(320px, calc(100% - 32px)); padding: 12px 14px; border-radius: 10px;
    background: color-mix(in srgb, var(--pt-surface) 94%, transparent); color: var(--pt-ink);
    box-shadow: 0 6px 24px rgba(0, 0, 0, .16); display: grid; grid-template-columns: 1fr auto; gap: 8px 10px; align-items: center;
    font-size: .875rem; line-height: 1.3;
}
.sdxp-pt-loading-title { display: flex; gap: 8px; align-items: center; font-weight: 600; min-width: 0; }
.sdxp-pt-loading-title span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sdxp-pt-loading-title svg { flex: none; color: var(--pt-accent); }
.sdxp-pt-loading-pct { font-variant-numeric: tabular-nums; color: var(--pt-muted); font-size: .8125rem; }
.sdxp-pt-bar-track { grid-column: 1 / -1; height: 4px; border-radius: 4px; background: var(--pt-line); overflow: hidden; }
.sdxp-pt-bar-fill { display: block; height: 100%; width: 6%; background: var(--pt-accent); border-radius: 4px; transition: width .2s; }

/* The book */
.sdxp-pt-book-wrap { position: relative; display: flex; justify-content: center; align-items: center; }
.sdxp-pt-book { margin: 0 auto; position: relative; }
.sdxp-pt-page { background: #fff; overflow: hidden; }
/* A soft spine down the middle of an open spread. */
.sdxp-pt.is-spread:not(.is-single-page) .sdxp-pt-book::after {
    content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 36px; transform: translateX(-50%); z-index: 5; pointer-events: none;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, .10) 46%, rgba(0, 0, 0, .16) 50%, rgba(0, 0, 0, .06) 54%, rgba(0, 0, 0, 0) 100%);
}
.sdxp-pt-book { box-shadow: none; }
.sdxp-pt-book .stf__item { box-shadow: 0 1px 2px rgba(0, 0, 0, .06); }
.sdxp-pt-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.sdxp-pt-ph {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(110deg, #f1f1ef 8%, #f8f8f6 18%, #f1f1ef 33%); background-size: 200% 100%;
    animation: sdxp-pt-shimmer 1.6s linear infinite; color: #c4c4be; font-size: 2.2rem; font-weight: 600;
}
.sdxp-pt-page.is-rendered .sdxp-pt-ph { display: none; }

/* Big previous/next arrows beside the book on wide screens. */
.sdxp-pt-side {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 20;
    width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer;
    display: none; align-items: center; justify-content: center;
    background: color-mix(in srgb, var(--pt-surface) 88%, transparent); color: var(--pt-ink);
    box-shadow: 0 2px 10px rgba(0, 0, 0, .15);
}
.sdxp-pt-side.sdxp-pt-btn { display: none; padding: 0; min-width: 0; }
.sdxp-pt-side:hover { background: var(--pt-surface); }
.sdxp-pt-side[disabled] { opacity: 0; pointer-events: none; }
.sdxp-pt-side-prev { left: 14px; }
.sdxp-pt-side-next { right: 14px; }
.sdxp-pt.is-spread .sdxp-pt-side.sdxp-pt-btn { display: inline-flex; }

/* Toolbar */
.sdxp-pt-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; padding: 10px 2px 0; }
.sdxp-pt-nav, .sdxp-pt-tools { display: flex; align-items: center; gap: 4px; }
.sdxp-pt-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-width: 44px; min-height: 44px; padding: 0 10px;
    border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--pt-ink); cursor: pointer; text-decoration: none;
    line-height: 1;
}
.sdxp-pt-btn:hover { background: var(--pt-stage); border-color: var(--pt-line); color: var(--pt-ink); }
.sdxp-pt-btn[disabled] { opacity: .35; cursor: default; background: transparent; border-color: transparent; }
.sdxp-pt-prev, .sdxp-pt-next { border-color: var(--pt-line); }
.sdxp-pt-count {
    min-height: 44px; padding: 0 12px; border: 0; background: transparent; cursor: pointer; border-radius: 8px;
    font-variant-numeric: tabular-nums; white-space: nowrap;
}
.sdxp-pt-count:hover { background: var(--pt-stage); }
.sdxp-pt-count-now { font-weight: 600; }
.sdxp-pt-count-of { color: var(--pt-muted); }
.sdxp-pt-play-btn { color: var(--pt-accent); }

.sdxp-pt-alt { margin: .6em 0 0; font-size: .875rem; color: var(--pt-muted); text-align: center; }
.sdxp-pt-alt a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.sdxp-pt-notice { padding: 12px 14px; border: 1px dashed var(--pt-line); border-radius: 8px; font-size: .9rem; }
.sdxp-pt-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.sdxp-pt-toast {
    position: absolute; left: 50%; bottom: 66px; transform: translate(-50%, 8px); z-index: 80;
    padding: 9px 14px; border-radius: 8px; background: var(--pt-ink); color: var(--pt-surface); font-size: .875rem;
    opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
}
.sdxp-pt-toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* Panels (all pages, zoom) cover the stage. */
.sdxp-pt-panel {
    position: absolute; inset: 0; z-index: 60; display: flex; flex-direction: column;
    background: var(--pt-surface); border-radius: var(--pt-radius);
}
.sdxp-pt-panel[hidden] { display: none; }
.sdxp-pt-panel-head { display: flex; align-items: center; gap: 10px; padding: 8px 8px 8px 16px; border-bottom: 1px solid var(--pt-line); flex-wrap: wrap; }
.sdxp-pt-panel-title { font-weight: 600; margin-right: auto; }
.sdxp-pt-jump { display: flex; align-items: center; gap: 6px; font-size: .875rem; }
.sdxp-pt-jump label { display: flex; align-items: center; gap: 8px; color: var(--pt-muted); }
.sdxp-pt-jump input { width: 4.5em; min-height: 40px; padding: 6px 8px; border: 1px solid var(--pt-line); border-radius: 6px; background: var(--pt-surface); }
.sdxp-pt-go { border-color: var(--pt-line); min-height: 40px; }
.sdxp-pt-thumb-grid {
    flex: 1; overflow: auto; padding: 16px; display: grid; gap: 14px 12px;
    grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); align-content: start;
}
.sdxp-pt-thumb { position: relative; border: 0; padding: 0; background: none; cursor: pointer; text-align: center; border-radius: 6px; }
.sdxp-pt-thumb-img { display: block; width: 100%; background: #eeeeec; border-radius: 3px; overflow: hidden; box-shadow: 0 1px 3px rgba(0, 0, 0, .14); border: 2px solid transparent; }
.sdxp-pt-thumb-img img { display: block; width: 100%; height: 100%; object-fit: cover; }
.sdxp-pt-thumb:hover .sdxp-pt-thumb-img { border-color: var(--pt-line); }
.sdxp-pt-thumb.is-current .sdxp-pt-thumb-img { border-color: var(--pt-accent); }
.sdxp-pt-thumb-n { display: block; font-size: .8125rem; margin-top: 4px; color: var(--pt-muted); font-variant-numeric: tabular-nums; }
.sdxp-pt-thumb.is-current .sdxp-pt-thumb-n { color: var(--pt-ink); font-weight: 600; }
.sdxp-pt-thumb.is-locked .sdxp-pt-thumb-img { opacity: .45; }
.sdxp-pt-lock { position: absolute; top: 8px; right: 8px; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--pt-surface); box-shadow: 0 1px 4px rgba(0, 0, 0, .2); }
.sdxp-pt-lock svg { width: 16px; height: 16px; }

.sdxp-pt-zoom-ctl { display: flex; align-items: center; gap: 2px; }
.sdxp-pt-zoom-level { min-width: 3.4em; text-align: center; font-variant-numeric: tabular-nums; font-size: .875rem; }
.sdxp-pt-zoom-scroll { flex: 1; overflow: auto; background: var(--pt-stage); cursor: grab; border-radius: 0 0 var(--pt-radius) var(--pt-radius); }
.sdxp-pt-zoom-scroll.is-dragging { cursor: grabbing; user-select: none; }
.sdxp-pt-zoom-pages { display: inline-flex; gap: 0; padding: 12px; min-width: 100%; justify-content: center; }
.sdxp-pt-zoom-canvas { display: block; background: #fff; box-shadow: 0 1px 6px rgba(0, 0, 0, .15); }

/* Gate */
.sdxp-pt-gate {
    position: relative; z-index: 70; display: flex; align-items: center; justify-content: center; padding: 16px;
    align-self: stretch; background: color-mix(in srgb, var(--pt-stage) 55%, transparent);
    -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.sdxp-pt-gate[hidden] { display: none; }
.sdxp-pt-gate-card {
    width: min(460px, 100%); background: var(--pt-surface); color: var(--pt-ink); border-radius: 12px; padding: 22px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, .18); margin: 0;
}
.sdxp-pt-gate-h { font-size: 1.3em; font-weight: 700; line-height: 1.25; margin: 0 0 .35em; }
.sdxp-pt-gate-intro { margin: 0 0 1em; color: var(--pt-muted); }
.sdxp-pt-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.sdxp-pt-field { margin: 0 0 12px; }
.sdxp-pt-field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
.sdxp-pt-field input[type=text], .sdxp-pt-field input[type=email], .sdxp-pt-field select {
    width: 100%; min-height: 44px; padding: 8px 10px; border: 1px solid color-mix(in srgb, var(--pt-ink) 30%, transparent); border-radius: 6px; background: var(--pt-surface);
}
.sdxp-pt-field [aria-invalid=true] { border-color: #b32d2e; }
.sdxp-pt-opt { font-weight: 400; color: var(--pt-muted); }
.sdxp-pt-check { display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; align-items: start; }
.sdxp-pt-check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--pt-accent); }
.sdxp-pt-check label { font-weight: 400; font-size: .875rem; margin: 0; }
.sdxp-pt-check label a { color: inherit; text-decoration: underline; }
.sdxp-pt-check .sdxp-pt-err { grid-column: 2; }
.sdxp-pt-err { display: block; color: #b32d2e; font-size: .8125rem; margin-top: 3px; }
.sdxp-pt-err:empty { display: none; }
.sdxp-pt-hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.sdxp-pt-gate-msg { color: #b32d2e; margin: 0 0 10px; font-size: .9rem; }
.sdxp-pt-gate-msg:empty { display: none; }
.sdxp-pt-gate-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.sdxp-pt-cta {
    display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 22px; border-radius: 8px;
    border: 2px solid var(--pt-accent); background: var(--pt-accent); color: var(--pt-on-accent) !important; font-weight: 600; cursor: pointer; text-decoration: none !important;
}
.sdxp-pt-cta:hover { filter: brightness(1.08); }
.sdxp-pt-cta[disabled] { opacity: .65; cursor: wait; }
.sdxp-pt-linkbtn { border: 0; background: none; padding: 8px 4px; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; color: var(--pt-ink); min-height: 44px; }
.sdxp-pt.has-gate .sdxp-pt-loading { display: none; }
.sdxp-pt.is-gated-before .sdxp-pt-sk-page { animation: none; }

.sdxp-pt-error { padding: 40px 20px; text-align: center; }
.sdxp-pt-error p { margin: 0 0 .8em; }

/* Full screen (and the CSS fallback for phones without the Fullscreen API). */
.sdxp-pt.is-full { background: var(--pt-surface); margin: 0; padding: 12px 16px; display: flex; flex-direction: column; justify-content: center; }
.sdxp-pt.is-full .sdxp-pt-stage { background: transparent; }
.sdxp-pt.is-full .sdxp-pt-alt { display: none; }
.sdxp-pt.is-pseudo-full { position: fixed; inset: 0; z-index: 999999; overflow: auto; }
html.sdxp-pt-noscroll, html.sdxp-pt-noscroll body { overflow: hidden !important; }

@media (max-width: 600px) {
    .sdxp-pt-stage { padding: 10px 0; border-radius: 8px; }
    .sdxp-pt-toolbar { justify-content: center; }
    .sdxp-pt-nav { width: 100%; justify-content: space-between; }
    .sdxp-pt-tools { width: 100%; justify-content: center; }
    .sdxp-pt-row { grid-template-columns: 1fr; }
    .sdxp-pt-gate { padding: 10px; }
    .sdxp-pt-gate-card { padding: 18px; }
    .sdxp-pt-thumb-grid { grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); padding: 12px; }
}

@media (prefers-reduced-motion: reduce) {
    .sdxp-pt-sk-page, .sdxp-pt-ph { animation: none; }
    .sdxp-pt-toast, .sdxp-pt-bar-fill { transition: none; }
}

/* StPageFlip (MIT) */
.stf__parent { position: relative; display: block; box-sizing: border-box; transform: translateZ(0); -ms-touch-action: pan-y; touch-action: pan-y; }
.sft__wrapper, .stf__wrapper { position: relative; width: 100%; box-sizing: border-box; }
/* We size the book ourselves (autoSize off), so the wrapper fills it. */
.sdxp-pt-book .stf__wrapper { height: 100%; }
.stf__parent canvas { position: absolute; width: 100%; height: 100%; left: 0; top: 0; }
.stf__block { position: absolute; width: 100%; height: 100%; box-sizing: border-box; perspective: 2000px; }
.stf__item { display: none; position: absolute; transform-style: preserve-3d; }
.stf__outerShadow, .stf__innerShadow, .stf__hardShadow, .stf__hardInnerShadow { position: absolute; left: 0; top: 0; }