/**
 * SvarogFlipbook — core front-end styles.
 * Realistic 3D page flip, toolbar, panels, lightbox and bookshelf.
 *
 * @package Svarog_Flipbook
 */

.svarog-flipbook,
.svarog-flipbook * {
    box-sizing: border-box;
}

.svarog-flipbook {
    --svarog-fb-accent: #6d5efc;
    --svarog-fb-accent-2: #b04dff;
    --svarog-fb-surface: #ffffff;
    --svarog-fb-surface-2: #f4f5fb;
    --svarog-fb-text: #1d2333;
    --svarog-fb-muted: #6b7280;
    --svarog-fb-border: rgba(17, 24, 39, .08);
    --svarog-fb-shadow: 0 18px 50px rgba(17, 24, 39, .22);
    --svarog-fb-radius: 14px;
    --svarog-fb-custom-bg: transparent;
    position: relative;
    width: 100%;
    color: var(--svarog-fb-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

.svarog-flipbook-stage {
    position: relative;
    width: 100%;
    margin: 0 auto;
    padding: 26px 18px 70px;
    border-radius: var(--svarog-fb-radius);
    background: var(--svarog-fb-custom-bg, transparent);
    overflow: hidden;
    isolation: isolate;
}

.svarog-flipbook-stage:fullscreen,
.svarog-flipbook-stage:-webkit-full-screen {
    width: 100%;
    height: 100%;
    padding: 48px 24px 84px;
    border-radius: 0;
    background: #05070d;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.svarog-flipbook-mode-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 99990;
    background: #05070d;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}
.svarog-flipbook-mode-fullscreen .svarog-flipbook-stage {
    width: 100%;
    height: 100%;
    max-width: none;
    border-radius: 0;
}

/* ---------------------------------------------------------------- *
 * Background themes
 * ---------------------------------------------------------------- */
.svarog-flipbook-theme-light .svarog-flipbook-stage { background: linear-gradient(160deg, #eef2ff 0%, #f8fafc 55%, #e6ecff 100%); }
.svarog-flipbook-theme-dark  .svarog-flipbook-stage { background: radial-gradient(120% 120% at 50% 0%, #1f2638 0%, #0c101c 60%, #05070d 100%); color: #e7ebf5; }
.svarog-flipbook-theme-sepia .svarog-flipbook-stage { background: linear-gradient(160deg, #f6ecda, #efe1c6); }
.svarog-flipbook-theme-slate .svarog-flipbook-stage { background: linear-gradient(160deg, #334155, #1e293b); color: #e2e8f0; }
.svarog-flipbook-theme-wood  .svarog-flipbook-stage { background: linear-gradient(160deg, #6b4a2b, #3d2817); color: #f6e7d2; }
.svarog-flipbook-theme-marble .svarog-flipbook-stage { background: linear-gradient(135deg, #f8fafc, #e2e8f0 40%, #cbd5e1); }
.svarog-flipbook-theme-night .svarog-flipbook-stage { background: linear-gradient(160deg, #0f172a, #020617); color: #cbd5e1; }
.svarog-flipbook-theme-gradient .svarog-flipbook-stage { background: linear-gradient(135deg, #6d5efc, #b04dff 50%, #38bdf8); color: #fff; }

/* ---------------------------------------------------------------- *
 * Loader
 * ---------------------------------------------------------------- */
.svarog-flipbook-loader {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: center;
    justify-content: center;
    z-index: 30;
    transition: opacity .4s ease, visibility .4s ease;
}
.svarog-flipbook-loader.is-hidden { opacity: 0; visibility: hidden; }
.svarog-flipbook-spinner {
    width: 46px; height: 46px;
    border-radius: 50%;
    border: 3px solid rgba(109, 94, 252, .2);
    border-top-color: var(--svarog-fb-accent);
    animation: svarog-fb-spin 0.9s linear infinite;
}
.svarog-flipbook-loader-text { font-size: 13px; letter-spacing: .04em; opacity: .75; }
@keyframes svarog-fb-spin { to { transform: rotate(360deg); } }

/* ---------------------------------------------------------------- *
 * Book shell
 * ---------------------------------------------------------------- */
.svarog-flipbook-book {
    position: relative;
    margin: 0 auto;
    perspective: 2400px;
    transition: width .3s ease, height .3s ease;
}
.svarog-flipbook-book-flip { transform-style: preserve-3d; }

.svarog-fb-page {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--svarog-fb-surface);
    display: flex;
    align-items: center;
    justify-content: center;
}
.svarog-fb-page img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    -webkit-user-drag: none;
    user-select: none;
}
.svarog-fb-canvas { max-width: 100%; max-height: 100%; display: block; }
.svarog-fb-page.is-blank { background: #e5e7eb; }

/* paper texture + glare */
.svarog-fb-page-glare {
    pointer-events: none;
    position: absolute;
    inset: 0;
    background: linear-gradient(115deg, rgba(255,255,255,.34) 0%, rgba(255,255,255,0) 32%, rgba(0,0,0,.06) 100%);
    mix-blend-mode: screen;
    opacity: .7;
    z-index: 3;
}

/* ---------------------------------------------------------------- *
 * 3D flip leaves
 * ---------------------------------------------------------------- */
.svarog-flipbook-book-flip .svarog-fb-leaf {
    position: absolute;
    top: 0;
    left: 50%;
    width: 50%;
    height: 100%;
    transform-origin: left center;
    transform-style: preserve-3d;
    transition: transform var(--svarog-fb-flip-speed, 700ms) cubic-bezier(.22,.72,.16,1);
    will-change: transform;
}
.svarog-flipbook-book-flip .svarog-fb-leaf.is-flipped { transform: rotateY(-180deg); }

.svarog-fb-leaf-face {
    position: absolute;
    inset: 0;
    overflow: hidden;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    background: var(--svarog-fb-surface);
    box-shadow: inset 0 0 0 1px rgba(0,0,0,.04);
}
.svarog-fb-leaf-front { z-index: 2; }
.svarog-fb-leaf-back  { transform: rotateY(180deg); }

/* spine shading near the centre fold */
.svarog-fb-leaf-front::after,
.svarog-fb-leaf-back::after {
    content: "";
    position: absolute;
    top: 0; bottom: 0;
    width: 34px;
    pointer-events: none;
    z-index: 4;
}
.svarog-fb-leaf-front::after { left: 0; background: linear-gradient(90deg, rgba(0,0,0,.16), transparent); }
.svarog-fb-leaf-back::after  { right: 0; background: linear-gradient(270deg, rgba(0,0,0,.16), transparent); }

/* centre gutter shadow drawn on the book itself */
.svarog-flipbook-book-flip::before {
    content: "";
    position: absolute;
    top: 0; bottom: 0; left: 50%;
    width: 60px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, rgba(0,0,0,0), rgba(0,0,0,.28), rgba(0,0,0,0));
    z-index: 9999;
    pointer-events: none;
    opacity: .9;
}

/* ---------------------------------------------------------------- *
 * Swipe / single-page modes
 * ---------------------------------------------------------------- */
.svarog-fb-swipe-track { position: relative; width: 100%; height: 100%; }
.svarog-fb-slide { position: absolute; inset: 0; transition: transform .5s cubic-bezier(.22,.72,.16,1), opacity .5s; }
.svarog-fb-slide:not(.is-active) { opacity: 0; pointer-events: none; }

.svarog-fb-simple-wrap { position: relative; width: 100%; height: 100%; }

/* ---------------------------------------------------------------- *
 * Scroll mode
 * ---------------------------------------------------------------- */
.svarog-flipbook-book-scroll { perspective: none; height: auto !important; }
.svarog-fb-scroll { display: flex; flex-direction: column; gap: 16px; width: 100%; }
.svarog-fb-scroll .svarog-fb-page {
    width: 100%;
    height: auto;
    aspect-ratio: var(--svarog-fb-page-ratio, 0.707);
    border-radius: 10px;
    box-shadow: 0 10px 28px rgba(17,24,39,.12);
    overflow: hidden;
}
.svarog-fb-scroll .svarog-fb-page.is-blank { display: none; }

/* ---------------------------------------------------------------- *
 * Hotspots & links
 * ---------------------------------------------------------------- */
.svarog-fb-hotspots, .svarog-fb-links { position: absolute; inset: 0; z-index: 6; }
.svarog-fb-hotspot {
    position: absolute;
    border-radius: 6px;
    border: 2px solid rgba(109,94,252,.75);
    background: rgba(109,94,252,.12);
    transition: background .2s, box-shadow .2s;
}
.svarog-fb-hotspot:hover { background: rgba(109,94,252,.28); box-shadow: 0 0 0 4px rgba(109,94,252,.18); }
.svarog-fb-hotspot-tooltip {
    position: absolute;
    left: 50%; bottom: 100%;
    transform: translateX(-50%);
    margin-bottom: 8px;
    padding: 6px 10px;
    background: #111827;
    color: #fff;
    font-size: 12px;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s;
}
.svarog-fb-hotspot:hover .svarog-fb-hotspot-tooltip { opacity: 1; }
.svarog-fb-link {
    position: absolute;
    border-radius: 4px;
    background: rgba(56,189,248,.16);
    border: 1px solid rgba(56,189,248,.5);
}

/* ---------------------------------------------------------------- *
 * Toolbar
 * ---------------------------------------------------------------- */
.svarog-flipbook-toolbar {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(255,255,255,.86);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    border: 1px solid var(--svarog-fb-border);
    border-radius: 999px;
    box-shadow: 0 12px 30px rgba(17,24,39,.16);
    z-index: 20;
    max-width: calc(100% - 24px);
    flex-wrap: wrap;
    justify-content: center;
}
.svarog-flipbook-toolbar-bottom .svarog-flipbook-toolbar { bottom: 14px; top: auto; }
.svarog-flipbook-toolbar-top .svarog-flipbook-toolbar { top: 14px; bottom: auto; }
.svarog-flipbook-toolbar-floating .svarog-flipbook-toolbar { bottom: 14px; top: auto; box-shadow: 0 18px 44px rgba(17,24,39,.28); }
.svarog-flipbook-toolbar-hidden .svarog-flipbook-toolbar { display: none; }

.svarog-fb-toolgroup { display: flex; align-items: center; gap: 4px; }
.svarog-fb-toolgroup-mid { padding: 0 6px; border-left: 1px solid var(--svarog-fb-border); border-right: 1px solid var(--svarog-fb-border); }

.svarog-fb-tool {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 0;
    background: transparent;
    color: inherit;
    padding: 8px;
    border-radius: 10px;
    cursor: pointer;
    transition: background .18s, color .18s, transform .18s;
    line-height: 1;
}
.svarog-fb-tool svg { width: 20px; height: 20px; display: block; }
.svarog-fb-tool:hover { background: rgba(109,94,252,.14); color: var(--svarog-fb-accent); transform: translateY(-1px); }
.svarog-fb-tool.is-active { background: var(--svarog-fb-accent); color: #fff; }
.svarog-fb-tool-label {
    font-size: 11px;
    font-weight: 600;
    display: none;
}
.svarog-flipbook-toolbar.is-mobile .svarog-fb-tool-label { display: none; }

.svarog-fb-pageinput { display: flex; align-items: center; gap: 4px; font-size: 13px; }
.svarog-fb-pagefield {
    width: 44px;
    padding: 5px 6px;
    text-align: center;
    border: 1px solid var(--svarog-fb-border);
    border-radius: 8px;
    background: var(--svarog-fb-surface);
    color: inherit;
    font-size: 13px;
}
.svarog-fb-of, .svarog-fb-counter { font-size: 12px; opacity: .7; white-space: nowrap; }

/* toolbar skin: floating (vertical side rail) */
.svarog-flipbook-skin-floating .svarog-flipbook-toolbar { flex-direction: column; border-radius: 20px; }

/* skin: neon */
.svarog-flipbook-skin-neon .svarog-flipbook-toolbar {
    background: rgba(10,12,24,.82);
    border-color: rgba(109,94,252,.5);
    box-shadow: 0 0 24px rgba(109,94,252,.45), 0 12px 30px rgba(0,0,0,.4);
    color: #eae6ff;
}
.svarog-flipbook-skin-neon .svarog-fb-tool:hover { background: rgba(109,94,252,.3); color: #fff; }
.svarog-flipbook-skin-neon .svarog-fb-tool.is-active { background: linear-gradient(135deg, #6d5efc, #b04dff); }

/* skin: gold */
.svarog-flipbook-skin-gold .svarog-flipbook-toolbar {
    background: linear-gradient(135deg, #2b2416, #171208);
    border-color: rgba(212,175,55,.6);
    color: #f5e6b8;
}
.svarog-flipbook-skin-gold .svarog-fb-tool:hover { background: rgba(212,175,55,.22); color: #ffe9a8; }
.svarog-flipbook-skin-gold .svarog-fb-tool.is-active { background: linear-gradient(135deg, #d4af37, #f7d774); color: #2b2416; }

/* skin: glass / light / dark / flat */
.svarog-flipbook-skin-glass .svarog-flipbook-toolbar { background: rgba(255,255,255,.5); }
.svarog-flipbook-skin-light .svarog-flipbook-toolbar { background: #fff; }
.svarog-flipbook-skin-dark .svarog-flipbook-toolbar { background: #1b2030; color: #e5e9f2; border-color: rgba(255,255,255,.1); }
.svarog-flipbook-skin-dark .svarog-fb-tool:hover { background: rgba(255,255,255,.12); }
.svarog-flipbook-skin-flat .svarog-flipbook-toolbar { background: #fff; box-shadow: none; border-radius: 8px; }
.svarog-flipbook-skin-modern .svarog-fb-tool.is-active { background: linear-gradient(135deg, var(--svarog-fb-accent), var(--svarog-fb-accent-2)); }

/* ---------------------------------------------------------------- *
 * Panels (thumbs / toc / search)
 * ---------------------------------------------------------------- */
.svarog-flipbook-thumbs,
.svarog-flipbook-toc,
.svarog-flipbook-search {
    position: absolute;
    z-index: 25;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--svarog-fb-border);
    border-radius: 14px;
    box-shadow: var(--svarog-fb-shadow);
    color: #1d2333;
}
.svarog-flipbook-thumbs {
    left: 14px; right: 14px; bottom: 78px;
    padding: 12px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
    gap: 10px;
    max-height: 42%;
    overflow-y: auto;
}
.svarog-flipbook-thumbs[hidden], .svarog-flipbook-toc[hidden], .svarog-flipbook-search[hidden] { display: none; }
.svarog-fb-thumb {
    position: relative;
    aspect-ratio: .72;
    border: 2px solid transparent;
    border-radius: 8px;
    overflow: hidden;
    background: #e5e7eb;
    cursor: pointer;
    padding: 0;
    transition: border-color .18s, transform .18s;
}
.svarog-fb-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.svarog-fb-thumb:hover { transform: translateY(-2px); }
.svarog-fb-thumb.is-active { border-color: var(--svarog-fb-accent); box-shadow: 0 0 0 3px rgba(109,94,252,.2); }
.svarog-fb-thumb-num {
    position: absolute; bottom: 4px; right: 6px;
    font-size: 10px; font-weight: 700;
    color: #fff; text-shadow: 0 1px 3px rgba(0,0,0,.8);
}
.svarog-fb-thumb-ph { display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; color: #6b7280; font-weight: 700; }

.svarog-flipbook-toc { left: 14px; top: 70px; bottom: 78px; width: min(340px, calc(100% - 28px)); padding: 16px; overflow-y: auto; }
.svarog-fb-toc-list { list-style: none; margin: 0; padding: 0; }
.svarog-fb-toc-item {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 10px 12px; border-radius: 8px; text-decoration: none; color: inherit;
    font-size: 14px; transition: background .16s;
}
.svarog-fb-toc-item:hover { background: rgba(109,94,252,.12); }
.svarog-fb-toc-page { font-size: 11px; font-weight: 700; color: var(--svarog-fb-accent); background: rgba(109,94,252,.14); border-radius: 999px; padding: 2px 9px; }
.svarog-fb-toc-empty { color: var(--svarog-fb-muted); font-size: 13px; text-align: center; }

.svarog-flipbook-search { left: 50%; top: 16px; transform: translateX(-50%); width: min(560px, calc(100% - 28px)); max-height: 74%; display: flex; flex-direction: column; overflow: hidden; }
.svarog-flipbook-search-bar { display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--svarog-fb-border); }
.svarog-flipbook-search-icon svg { width: 18px; height: 18px; opacity: .5; display: block; }
.svarog-flipbook-search-bar input { flex: 1; border: 0; background: transparent; font-size: 15px; outline: none; color: inherit; }
.svarog-flipbook-search-bar button, .svarog-flipbook-zoom button {
    border: 0; background: transparent; cursor: pointer; font-size: 18px; line-height: 1; color: inherit; opacity: .7; padding: 4px 8px; border-radius: 8px;
}
.svarog-flipbook-search-bar button:hover, .svarog-flipbook-zoom button:hover { background: rgba(0,0,0,.06); opacity: 1; }
.svarog-flipbook-search-results { overflow-y: auto; padding: 8px; }
.svarog-fb-search-count { margin: 6px 10px; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--svarog-fb-muted); }
.svarog-fb-search-result { display: block; width: 100%; text-align: left; border: 0; background: transparent; padding: 10px 12px; border-radius: 8px; cursor: pointer; font-size: 13px; color: inherit; }
.svarog-fb-search-result:hover { background: rgba(109,94,252,.12); }
.svarog-fb-search-result-page { display: inline-block; font-size: 10px; font-weight: 700; color: var(--svarog-fb-accent); background: rgba(109,94,252,.14); border-radius: 999px; padding: 1px 8px; margin-right: 8px; }
.svarog-fb-search-result mark, .svarog-fb-page mark { background: #ffe066; color: inherit; border-radius: 3px; padding: 0 2px; }
.svarog-fb-search-none { text-align: center; color: var(--svarog-fb-muted); font-size: 13px; padding: 18px; }

/* ---------------------------------------------------------------- *
 * Zoom
 * ---------------------------------------------------------------- */
.svarog-flipbook-zoom {
    position: absolute; right: 16px; bottom: 78px; z-index: 26;
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    background: rgba(17,20,32,.9); color: #fff; border-radius: 12px; padding: 8px;
    box-shadow: var(--svarog-fb-shadow);
}
.svarog-flipbook-zoom[hidden] { display: none; }
.svarog-flipbook-zoom button svg { width: 18px; height: 18px; display: block; }
.svarog-flipbook-zoom span { font-size: 11px; font-weight: 700; }

/* ---------------------------------------------------------------- *
 * Progress bar
 * ---------------------------------------------------------------- */
.svarog-flipbook-progress {
    position: absolute; left: 0; right: 0; bottom: 0; height: 3px;
    background: rgba(17,24,39,.08); z-index: 18; overflow: hidden;
}
.svarog-flipbook-progress span {
    display: block; height: 100%; width: 0;
    background: linear-gradient(90deg, var(--svarog-fb-accent), var(--svarog-fb-accent-2));
    transition: width .4s ease;
}

/* ---------------------------------------------------------------- *
 * Media / share overlay
 * ---------------------------------------------------------------- */
.svarog-fb-media-overlay {
    position: fixed; inset: 0; z-index: 100000;
    display: flex; align-items: center; justify-content: center;
    background: rgba(6,8,16,.7); backdrop-filter: blur(6px);
}
.svarog-fb-media-box {
    position: relative; background: #fff; color: #1d2333;
    border-radius: 14px; padding: 22px; max-width: min(560px, 92vw); width: 100%;
    box-shadow: var(--svarog-fb-shadow);
}
.svarog-fb-media-close { position: absolute; top: 8px; right: 8px; border: 0; background: transparent; font-size: 22px; cursor: pointer; line-height: 1; padding: 6px 10px; border-radius: 8px; }
.svarog-fb-media-close:hover { background: rgba(0,0,0,.06); }
.svarog-fb-share-input { width: 100%; padding: 10px 12px; border: 1px solid var(--svarog-fb-border); border-radius: 8px; font-size: 13px; }

/* ---------------------------------------------------------------- *
 * Lightbox
 * ---------------------------------------------------------------- */
.svarog-fb-lightbox {
    position: fixed; inset: 0; z-index: 99999;
    display: none; align-items: center; justify-content: center;
    background: rgba(5,7,14,.92); backdrop-filter: blur(8px);
}
.svarog-fb-lightbox.is-open { display: flex; animation: svarog-fb-fade .3s ease; }
.svarog-fb-lightbox-inner { position: relative; width: min(1200px, 96vw); max-height: 96vh; }
.svarog-fb-lightbox .svarog-flipbook-stage { padding: 20px 16px 70px; }
.svarog-fb-lightbox-close {
    position: absolute; top: -8px; right: -8px; z-index: 5;
    width: 40px; height: 40px; border-radius: 50%;
    border: 0; background: rgba(255,255,255,.14); color: #fff; font-size: 24px; cursor: pointer; line-height: 1;
}
.svarog-fb-lightbox-close:hover { background: rgba(255,255,255,.28); }
body.svarog-fb-noscroll { overflow: hidden; }
@keyframes svarog-fb-fade { from { opacity: 0; } to { opacity: 1; } }

/* ---------------------------------------------------------------- *
 * Lightbox cover trigger
 * ---------------------------------------------------------------- */
.svarog-flipbook-cover { position: relative; display: block; width: 100%; max-width: 420px; margin: 0 auto; cursor: pointer; border-radius: 10px; overflow: hidden; box-shadow: var(--svarog-fb-shadow); }
.svarog-flipbook-cover-media { position: relative; }
.svarog-flipbook-cover-media img { display: block; width: 100%; height: auto; }
.svarog-flipbook-cover-shine { position: absolute; inset: 0; background: linear-gradient(120deg, rgba(255,255,255,.4), transparent 45%); mix-blend-mode: screen; }
.svarog-flipbook-cover-spine { position: absolute; top: 0; bottom: 0; left: 0; width: 14px; background: linear-gradient(90deg, rgba(0,0,0,.3), transparent); }
.svarog-flipbook-open-hint {
    position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
    color: #fff; background: rgba(6,8,16,.4); opacity: 0; transition: opacity .25s; font-weight: 600;
}
.svarog-flipbook-open-hint svg { width: 34px; height: 34px; }
.svarog-flipbook-cover:hover .svarog-flipbook-open-hint { opacity: 1; }
.svarog-flipbook-open-link { border: 0; background: linear-gradient(135deg, var(--svarog-fb-accent), var(--svarog-fb-accent-2)); color: #fff; padding: 12px 22px; border-radius: 999px; font-weight: 700; cursor: pointer; }

/* ---------------------------------------------------------------- *
 * Bookshelf
 * ---------------------------------------------------------------- */
.svarog-flipbook-bookshelf { display: grid; gap: 26px; margin: 0; }
.svarog-flipbook-bookshelf-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.svarog-flipbook-bookshelf-list { grid-template-columns: 1fr; }
.svarog-flipbook-shelf-item { display: flex; flex-direction: column; gap: 12px; }
.svarog-flipbook-shelf-cover { position: relative; aspect-ratio: .72; border-radius: 8px; overflow: hidden; box-shadow: 0 16px 40px rgba(17,24,39,.28); background: #1f2638; transition: transform .3s ease; }
.svarog-flipbook-shelf-book:hover .svarog-flipbook-shelf-cover { transform: translateY(-6px) rotateY(-6deg); }
.svarog-flipbook-shelf-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.svarog-flipbook-shelf-spine { position: absolute; top: 0; bottom: 0; left: 0; width: 12px; background: linear-gradient(90deg, rgba(0,0,0,.35), transparent); }
.svarog-flipbook-shelf-pages { position: absolute; top: 6px; bottom: 6px; right: 0; width: 8px; background: repeating-linear-gradient(to bottom, #f8fafc 0 2px, #cbd5e1 2px 3px); border-radius: 0 6px 6px 0; }
.svarog-flipbook-shelf-placeholder { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.6); }
.svarog-flipbook-shelf-placeholder svg { width: 46px; height: 46px; }
.svarog-flipbook-shelf-actions { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: 10px; background: rgba(6,8,16,.55); opacity: 0; transition: opacity .25s; }
.svarog-flipbook-shelf-book:hover .svarog-flipbook-shelf-actions { opacity: 1; }
.svarog-flipbook-shelf-read, .svarog-flipbook-shelf-download {
    display: inline-flex; align-items: center; gap: 6px; border: 0; cursor: pointer;
    background: #fff; color: #1d2333; padding: 9px 16px; border-radius: 999px; font-weight: 700; font-size: 13px; text-decoration: none;
}
.svarog-flipbook-shelf-read svg, .svarog-flipbook-shelf-download svg { width: 16px; height: 16px; }
.svarog-flipbook-shelf-title { margin: 0; font-size: 15px; }
.svarog-flipbook-shelf-excerpt { margin: 4px 0 0; font-size: 13px; color: var(--svarog-fb-muted); }
.svarog-flipbook-shelf-pages-count { font-size: 12px; color: var(--svarog-fb-muted); }
.svarog-flipbook-empty { text-align: center; color: var(--svarog-fb-muted); }

/* ---------------------------------------------------------------- *
 * RTL
 * ---------------------------------------------------------------- */
.svarog-flipbook-rtl .svarog-flipbook-book-flip .svarog-fb-leaf { left: auto; right: 50%; transform-origin: right center; }
.svarog-flipbook-rtl .svarog-flipbook-book-flip .svarog-fb-leaf.is-flipped { transform: rotateY(180deg); }
.svarog-flipbook-rtl .svarog-fb-leaf-front::after { left: auto; right: 0; background: linear-gradient(270deg, rgba(0,0,0,.16), transparent); }
.svarog-flipbook-rtl .svarog-fb-leaf-back::after { right: auto; left: 0; background: linear-gradient(90deg, rgba(0,0,0,.16), transparent); }
.svarog-flipbook-rtl .svarog-flipbook-toc { left: auto; right: 14px; }

/* ---------------------------------------------------------------- *
 * Responsive
 * ---------------------------------------------------------------- */
@media (max-width: 782px) {
    .svarog-flipbook-stage { padding: 16px 10px 64px; }
    .svarog-flipbook-toolbar { gap: 2px; padding: 6px 8px; }
    .svarog-fb-tool { padding: 8px 6px; }
    .svarog-flipbook-thumbs { bottom: 68px; }
    .svarog-flipbook-toc { top: 64px; bottom: 68px; }
}
@media (max-width: 480px) {
    .svarog-fb-pageinput { display: none; }
}
@media (prefers-reduced-motion: reduce) {
    .svarog-flipbook-book-flip .svarog-fb-leaf,
    .svarog-fb-slide { transition: none; }
}

/* ---------------------------------------------------------------- *
 * Watermark + logo overlays
 * ---------------------------------------------------------------- */
.svarog-flipbook-watermark {
    position: absolute; inset: 0; z-index: 8; pointer-events: none;
    display: flex; flex-wrap: wrap; align-content: center; justify-content: center;
    overflow: hidden; gap: 8% 12%; padding: 22px; transform: rotate(-24deg) scale(1.35);
}
.svarog-flipbook-watermark span {
    font-size: clamp(13px, 2.2vw, 26px); font-weight: 800; letter-spacing: .12em;
    color: #1d2333; white-space: nowrap; text-transform: uppercase;
    -webkit-user-select: none; user-select: none;
}
.svarog-flipbook-theme-dark .svarog-flipbook-watermark span,
.svarog-flipbook-theme-night .svarog-flipbook-watermark span { color: #fff; }

.svarog-flipbook-logo {
    position: absolute; z-index: 45; display: inline-block; line-height: 0; pointer-events: auto;
    transition: opacity .25s ease;
}
.svarog-flipbook-logo img { display: block; max-height: 42px; max-width: 160px; width: auto; height: auto; }
.svarog-flipbook-logo:hover { opacity: 1 !important; }
.svarog-flipbook-logo-top-left { top: 12px; left: 12px; }
.svarog-flipbook-logo-top-right { top: 12px; right: 12px; }
.svarog-flipbook-logo-bottom-left { bottom: 60px; left: 12px; }
.svarog-flipbook-logo-bottom-right { bottom: 60px; right: 12px; }

/* ---------------------------------------------------------------- *
 * Content protection
 * ---------------------------------------------------------------- */
.svarog-flipbook-protected .svarog-fb-page,
.svarog-flipbook-protected .svarog-fb-canvas {
    -webkit-user-select: none; user-select: none;
    -webkit-user-drag: none; -webkit-touch-callout: none;
}
.svarog-flipbook-protected .svarog-fb-hotspots { -webkit-user-select: none; user-select: none; }

/* ---------------------------------------------------------------- *
 * Rich share menu
 * ---------------------------------------------------------------- */
.svarog-fb-share-sub { margin: 2px 0 16px; color: var(--svarog-fb-muted); font-size: 13px; }
.svarog-fb-share-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 10px; margin-bottom: 16px; }
.svarog-fb-share-btn {
    display: flex; flex-direction: column; align-items: center; gap: 7px;
    padding: 12px 8px; border-radius: 12px; text-decoration: none; color: #1d2333;
    background: rgba(15,23,42,.05); border: 1px solid var(--svarog-fb-border);
    font-size: 12px; font-weight: 600; transition: transform .2s ease, background .2s ease, color .2s ease;
}
.svarog-fb-share-btn:hover { transform: translateY(-2px); color: #fff; }
.svarog-fb-share-icon svg { width: 22px; height: 22px; display: block; }
.svarog-fb-share-facebook:hover { background: #1877f2; border-color: #1877f2; }
.svarog-fb-share-twitter:hover { background: #0f1419; border-color: #0f1419; }
.svarog-fb-share-linkedin:hover { background: #0a66c2; border-color: #0a66c2; }
.svarog-fb-share-pinterest:hover { background: #e60023; border-color: #e60023; }
.svarog-fb-share-whatsapp:hover { background: #25d366; border-color: #25d366; }
.svarog-fb-share-telegram:hover { background: #229ed9; border-color: #229ed9; }
.svarog-fb-share-email:hover { background: #475569; border-color: #475569; }
.svarog-fb-share-copy { display: flex; gap: 8px; }
.svarog-fb-share-copy .svarog-fb-share-input { flex: 1; }
.svarog-fb-share-copybtn, .svarog-fb-share-native {
    border: 0; cursor: pointer; border-radius: 8px; padding: 10px 16px; font-weight: 700; font-size: 13px;
    background: linear-gradient(135deg, var(--svarog-fb-accent), var(--svarog-fb-accent-2)); color: #fff; white-space: nowrap;
}
.svarog-fb-share-native { margin-top: 12px; width: 100%; background: rgba(15,23,42,.08); color: #1d2333; }

/* Read-aloud active state */
.svarog-fb-tool-read.is-active { color: var(--svarog-fb-accent); }
.svarog-fb-tool-read.is-active::after {
    content: ""; position: absolute; inset: 4px; border-radius: 8px;
    border: 2px solid var(--svarog-fb-accent); opacity: .5;
    animation: svarog-fb-pulse 1.4s ease-in-out infinite;
}
.svarog-fb-tool { position: relative; }
@keyframes svarog-fb-pulse { 0%,100% { opacity: .2; } 50% { opacity: .65; } }

@media (max-width: 782px) {
    .svarog-flipbook-logo img { max-height: 30px; max-width: 110px; }
    .svarog-flipbook-logo-bottom-left, .svarog-flipbook-logo-bottom-right { bottom: 64px; }
}