.reader-tone-control{position:relative;display:inline-flex;align-items:stretch}.reader-tone-popover{position:absolute;z-index:100;top:calc(100% + 9px);right:0;width:292px;display:flex;flex-direction:column;gap:5px;border:1px solid #d4e2eb;border-radius:15px;padding:13px;background:rgba(255,255,255,.98);box-shadow:0 18px 46px rgba(25,59,83,.18);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.reader-tone-popover>strong{color:var(--ink);font-size:12px}.reader-tone-popover>small{color:var(--muted);font-size:9px;line-height:1.4}.reader-tone-popover>div{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;margin-top:5px}.reader-tone-popover>div>button{min-width:0;min-height:60px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;border:1px solid #dce6ec;border-radius:10px;padding:7px 5px;background:#f9fbfc;color:#61798a;font-size:9px;font-weight:800;cursor:pointer}.reader-tone-popover>div>button:hover{border-color:#aacbdd;background:#f2f8fb}.reader-tone-popover>div>button.is-active{border-color:#69a8cf;background:#eaf5fb;color:#275f83;box-shadow:inset 0 0 0 1px rgba(74,145,189,.12)}.reader-tone-swatch{width:30px;height:22px;display:block;border:1px solid rgba(62,79,91,.16);border-radius:6px;box-shadow:inset 0 0 0 5px rgba(255,255,255,.75)}.reader-tone-swatch.is-light{background:#dfe7ec}.reader-tone-swatch.is-warm{background:#e7ddcb}.reader-tone-swatch.is-dark{background:#2a3035}html[data-reader-tone=light] .reader-page-stage{background:radial-gradient(circle at 50% 18%,rgba(255,255,255,.72),transparent 42%),#dfe7ec}html[data-reader-tone=warm] .reader-page-stage{background:radial-gradient(circle at 50% 16%,rgba(255,250,238,.65),transparent 44%),#e4dac8}html[data-reader-tone=dark] .reader-page-stage{background:radial-gradient(circle at 50% 17%,rgba(91,101,108,.32),transparent 43%),#252b30}html[data-reader-tone=warm] .reader-edge-prev{background:linear-gradient(90deg,rgba(214,201,180,.76),transparent)}html[data-reader-tone=warm] .reader-edge-next{background:linear-gradient(270deg,rgba(214,201,180,.76),transparent)}html[data-reader-tone=dark] .reader-edge-prev{background:linear-gradient(90deg,rgba(19,23,26,.64),transparent)}html[data-reader-tone=dark] .reader-edge-next{background:linear-gradient(270deg,rgba(19,23,26,.64),transparent)}html[data-reader-tone=dark] .reader-edge-nav span{border-color:rgba(160,181,194,.34);background:rgba(38,47,53,.88);color:#d9e7ef;box-shadow:0 8px 26px rgba(0,0,0,.24)}html[data-reader-tone=dark] .reader-focus-float,html[data-reader-tone=dark] .reader-stage-counter{border-color:rgba(163,184,197,.25);background:rgba(38,47,53,.88);color:#dbe7ed;box-shadow:0 8px 26px rgba(0,0,0,.22)}html[data-reader-tone=dark] .reader-stage-counter>small,html[data-reader-tone=dark] .reader-stage-counter>span{color:#d8e5ec}html[data-reader-tone=dark] .reader-stage-counter>em{border-left-color:rgba(205,219,226,.2);color:#91cbb4}.reader-mode-switch{gap:4px;padding:4px;border-color:#cbdce7;border-radius:14px;background:#eaf2f7;box-shadow:inset 0 1px 2px rgba(34,68,91,.04)}.reader-mode-switch button{min-height:38px;border-radius:10px;padding-inline:13px;color:#60798b;transition:background .15s ease,color .15s ease,box-shadow .15s ease,transform .15s ease}.reader-mode-switch button>span{font-size:15px;line-height:1}.reader-mode-switch button.is-active{background:#276f9e;color:#fff;box-shadow:0 4px 12px rgba(39,111,158,.22)}.reader-mode-switch button.is-active:hover{background:#22658f;color:#fff}.reader-mode-switch button:active{transform:translateY(1px)}.reader-page-stage:not(.is-zoomed) .reader-page-viewport{align-items:center}.reader-page-stage:not(.is-zoomed) .reader-page-paper{min-height:100%}.reader-mode-spread .reader-spread-paper{position:relative;gap:4px}.reader-mode-spread .reader-spread-paper:not(.is-cover-only):after{content:"";position:absolute;z-index:4;top:0;bottom:0;left:50%;width:12px;transform:translateX(-50%);pointer-events:none;background:linear-gradient(90deg,rgba(0,0,0,.08),rgba(255,255,255,.12) 48%,rgba(0,0,0,.07));opacity:.36}.reader-mode-page .reader-page-image,.reader-mode-spread .reader-page-image{border-radius:2px}@media (min-width:1500px){.reader-page-viewport{padding-inline:110px}.reader-edge-nav{width:104px}.reader-edge-prev{padding-left:24px}.reader-edge-next{padding-right:24px}.reader-mode-spread .reader-page-paper{max-width:1680px;margin-inline:auto}}@media (max-width:760px){.reader-tone-popover{position:fixed;top:auto;right:8px;bottom:72px;left:8px;width:auto}.reader-mode-switch button{min-height:38px;padding-inline:10px}}@media (orientation:portrait) and (min-width:681px) and (max-width:980px){.reader-mode-spread .reader-page-image{box-shadow:0 7px 20px rgba(24,50,70,.12)}}@media (prefers-reduced-motion:reduce){.reader-mode-switch button{transition:none}}.reader-shell:fullscreen.reader-mode-page,.reader-shell:fullscreen.reader-mode-scroll,.reader-shell:fullscreen.reader-mode-spread{width:100vw;height:100dvh;min-height:100dvh;background:#dfe7ec}.reader-shell:fullscreen.reader-mode-page .reader-assignment-banner,.reader-shell:fullscreen.reader-mode-page .reader-assignment-panel,.reader-shell:fullscreen.reader-mode-page .reader-footer,.reader-shell:fullscreen.reader-mode-page .reader-header,.reader-shell:fullscreen.reader-mode-page .reader-message,.reader-shell:fullscreen.reader-mode-page .reader-pagination-note,.reader-shell:fullscreen.reader-mode-page .reader-parts,.reader-shell:fullscreen.reader-mode-page .reader-toolbar,.reader-shell:fullscreen.reader-mode-scroll .reader-assignment-banner,.reader-shell:fullscreen.reader-mode-scroll .reader-assignment-panel,.reader-shell:fullscreen.reader-mode-scroll .reader-footer,.reader-shell:fullscreen.reader-mode-scroll .reader-header,.reader-shell:fullscreen.reader-mode-scroll .reader-message,.reader-shell:fullscreen.reader-mode-scroll .reader-pagination-note,.reader-shell:fullscreen.reader-mode-scroll .reader-parts,.reader-shell:fullscreen.reader-mode-scroll .reader-toolbar,.reader-shell:fullscreen.reader-mode-spread .reader-assignment-banner,.reader-shell:fullscreen.reader-mode-spread .reader-assignment-panel,.reader-shell:fullscreen.reader-mode-spread .reader-footer,.reader-shell:fullscreen.reader-mode-spread .reader-header,.reader-shell:fullscreen.reader-mode-spread .reader-message,.reader-shell:fullscreen.reader-mode-spread .reader-pagination-note,.reader-shell:fullscreen.reader-mode-spread .reader-parts,.reader-shell:fullscreen.reader-mode-spread .reader-toolbar{display:none!important}.reader-shell:fullscreen.reader-mode-page .reader-page-stage,.reader-shell:fullscreen.reader-mode-spread .reader-page-stage{flex:1 1 100dvh;width:100vw;height:100dvh;min-height:100dvh;padding:0}.reader-shell:fullscreen.reader-mode-scroll .reader-frame-wrap,.reader-shell:fullscreen.reader-mode-scroll .reader-scroll-wrap{flex:1 1 100dvh;width:100vw;height:100dvh;min-height:100dvh;padding:0}.reader-shell:fullscreen.reader-mode-scroll .reader-frame{width:100vw;height:100dvh;min-height:100dvh;border:0;border-radius:0;box-shadow:none}.reader-shell:fullscreen .reader-page-viewport{inset:0;padding:max(0px,env(safe-area-inset-top)) max(64px,calc(env(safe-area-inset-right) + 44px)) max(0px,env(safe-area-inset-bottom)) max(64px,calc(env(safe-area-inset-left) + 44px))}.reader-shell:fullscreen .reader-page-paper{min-height:100%;height:100%}.reader-shell:fullscreen .reader-page-image{max-height:100%}.reader-shell:fullscreen .reader-edge-nav{width:clamp(82px,11vw,176px)}.reader-shell:fullscreen .reader-edge-prev{padding-left:max(10px,env(safe-area-inset-left))}.reader-shell:fullscreen .reader-edge-next{padding-right:max(10px,env(safe-area-inset-right))}.reader-shell:fullscreen .reader-edge-nav span{opacity:.64;transform:scale(.96)}.reader-shell:fullscreen .reader-edge-nav:hover span{opacity:1;transform:scale(1)}.reader-shell:fullscreen .reader-edge-next:after,.reader-shell:fullscreen .reader-edge-prev:after{position:absolute;top:50%;transform:translateY(46px);color:rgba(53,83,104,.72);font-size:10px;font-weight:800;letter-spacing:.01em;opacity:0;transition:opacity .16s ease}.reader-shell:fullscreen .reader-edge-prev:after{content:"Назад";left:14px}.reader-shell:fullscreen .reader-edge-next:after{content:"Далі";right:14px}.reader-shell:fullscreen .reader-edge-nav:hover:after{opacity:.82}.reader-shell:fullscreen .reader-stage-counter{bottom:max(10px,calc(env(safe-area-inset-bottom) + 6px))}.reader-shell:fullscreen .reader-reading-progress{bottom:0}.reader-fullscreen-exit-wrap{position:fixed;z-index:80;top:max(10px,calc(env(safe-area-inset-top) + 6px));right:max(10px,calc(env(safe-area-inset-right) + 6px));display:inline-flex;align-items:center;gap:3px;padding:4px;border:1px solid rgba(198,215,225,.76);border-radius:14px;background:rgba(255,255,255,.86);box-shadow:0 8px 28px rgba(29,61,84,.11);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);opacity:.58;transition:opacity .18s ease,transform .18s ease}.reader-fullscreen-exit-wrap:focus-within,.reader-fullscreen-exit-wrap:hover{opacity:1}.reader-fullscreen-tool{min-width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;gap:5px;border:0;border-radius:9px;padding:5px 8px;background:transparent;color:#506d80;font-size:11px;font-weight:850;cursor:pointer}.reader-fullscreen-tool:hover{background:#edf6fb;color:#2d6386}.reader-fullscreen-tool.is-active{background:#e1f1fa;color:#24658e}.reader-fullscreen-tool>span{font-size:16px;line-height:1}.reader-fullscreen-tool>em{font-size:9px;font-style:normal;font-weight:850;white-space:nowrap}.reader-fullscreen-tool.reader-fullscreen-exit>span{font-size:20px}.reader-fullscreen-separator{width:1px;height:22px;margin-inline:2px;background:rgba(126,153,171,.28)}html[data-reader-tone=dark] .reader-fullscreen-exit-wrap{border-color:rgba(163,184,197,.25);background:rgba(38,47,53,.9);box-shadow:0 8px 26px rgba(0,0,0,.22)}html[data-reader-tone=dark] .reader-fullscreen-tool{color:#d2e0e7}html[data-reader-tone=dark] .reader-fullscreen-tool.is-active,html[data-reader-tone=dark] .reader-fullscreen-tool:hover{background:rgba(119,163,190,.18);color:#edf7fb}html[data-reader-tone=dark] .reader-fullscreen-separator{background:rgba(205,219,226,.18)}.reader-shell.is-fullscreen-idle .reader-edge-nav span,.reader-shell.is-fullscreen-idle .reader-edge-nav:after,.reader-shell.is-fullscreen-idle .reader-fullscreen-exit-wrap,.reader-shell.is-fullscreen-idle .reader-stage-counter{opacity:0;pointer-events:none}.reader-shell.is-fullscreen-idle .reader-edge-next,.reader-shell.is-fullscreen-idle .reader-edge-prev{background:transparent}.reader-shell.is-fullscreen-idle.reader-mode-page .reader-page-stage,.reader-shell.is-fullscreen-idle.reader-mode-spread .reader-page-stage{cursor:none}.reader-shell.is-controls-hidden:fullscreen .reader-edge-nav span,.reader-shell.is-controls-hidden:fullscreen .reader-edge-nav:after,.reader-shell.is-controls-hidden:fullscreen .reader-fullscreen-exit-wrap{opacity:0;pointer-events:none}@media (min-width:1280px){.reader-page-stage:not(.is-zoomed) .reader-edge-nav{width:clamp(84px,9vw,144px)}.reader-page-stage:not(.is-zoomed) .reader-page-viewport{padding-inline:clamp(78px,7.5vw,124px)}}@media (max-width:900px){.reader-fullscreen-tool>em{display:none}.reader-fullscreen-exit-wrap{gap:2px;padding:3px}.reader-fullscreen-tool{min-width:34px;height:34px;padding-inline:6px}}@media (max-width:720px){.reader-shell:fullscreen .reader-page-viewport{padding-right:max(38px,calc(env(safe-area-inset-right) + 24px));padding-left:max(38px,calc(env(safe-area-inset-left) + 24px))}.reader-shell:fullscreen .reader-edge-nav{width:48px}.reader-shell:fullscreen .reader-edge-next:after,.reader-shell:fullscreen .reader-edge-prev:after{display:none}.reader-fullscreen-separator{margin-inline:0}}@media (max-width:520px){.reader-fullscreen-exit-wrap .is-pages-tool,.reader-fullscreen-exit-wrap .is-spread-tool{display:none}}@media (prefers-reduced-motion:reduce){.reader-edge-nav span,.reader-edge-nav:after,.reader-fullscreen-exit-wrap{transition:none}}.reader-page-image,.reader-page-paper{animation:none!important}.reader-page-image{background:#fff!important}.reader-scroll-wrap.has-native-continuous-scroll{position:relative;min-height:0;overflow:hidden;padding:0;background:#dfe7ec}.reader-scroll-wrap.has-native-continuous-scroll>.reader-frame{display:none!important}.reader-continuous-loading{height:100%;min-height:240px;display:grid;place-items:center;padding:24px;color:#60798b;background:#e8eef2;font-size:12px;font-weight:800}.reader-continuous-scroll{width:100%;height:100%;min-height:0;overflow-x:hidden;overflow-y:auto;overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch;touch-action:pan-y;scrollbar-gutter:stable;padding:clamp(8px,1.8vw,22px) clamp(8px,3vw,40px) 36px;background:#dfe7ec}.reader-continuous-page{position:relative;width:min(100%,920px);margin:0 auto clamp(10px,1.8vw,20px);content-visibility:auto;contain-intrinsic-size:900px 1273px}.reader-continuous-page img{display:block;width:100%;height:auto;aspect-ratio:1/1.4142;object-fit:contain;background:#fff;box-shadow:0 8px 30px rgba(24,50,70,.14);-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.reader-continuous-page figcaption{position:absolute;right:8px;bottom:8px;min-width:28px;height:24px;display:grid;place-items:center;border-radius:999px;padding-inline:7px;background:rgba(39,54,65,.68);color:#fff;font-size:10px;font-weight:850;pointer-events:none;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}html[data-reader-tone=warm] .reader-continuous-loading,html[data-reader-tone=warm] .reader-continuous-scroll,html[data-reader-tone=warm] .reader-scroll-wrap.has-native-continuous-scroll{background:#e4dac8}html[data-reader-tone=dark] .reader-continuous-loading,html[data-reader-tone=dark] .reader-continuous-scroll,html[data-reader-tone=dark] .reader-scroll-wrap.has-native-continuous-scroll{background:#252b30;color:#d4e2e9}@media (max-width:600px){.reader-shell.reader-mode-scroll{height:100dvh;min-height:100dvh}.reader-mode-scroll .reader-scroll-wrap{min-height:0}.reader-continuous-scroll{padding:5px 4px 26px;scroll-padding-top:5px}.reader-continuous-page{width:100%;margin-bottom:7px}.reader-continuous-page img{box-shadow:0 3px 12px rgba(24,50,70,.11)}.reader-continuous-page figcaption{right:6px;bottom:6px;height:22px;min-width:25px;font-size:9px}.reader-mode-page .reader-page-stage,.reader-mode-spread .reader-page-stage{padding-inline:34px}.reader-mode-page .reader-edge-nav,.reader-mode-spread .reader-edge-nav{width:38px}}@media (max-width:420px),(orientation:landscape) and (max-height:520px){.reader-header{padding:6px 8px}.reader-book-info>div>small,.reader-footer,.reader-pagination-note{display:none}.reader-toolbar{padding-block:4px}.reader-mode-switch button{min-height:34px;padding:6px 8px}.reader-continuous-scroll{padding-top:3px}}@media (min-width:601px) and (max-width:1024px) and (orientation:portrait){.reader-continuous-page{width:min(100%,760px)}.reader-page-stage{padding-inline:52px}.reader-mode-spread .reader-page-stage{padding-inline:42px}}@media (min-width:760px) and (max-width:1399px) and (orientation:landscape){.reader-continuous-page{width:min(84vw,860px)}.reader-mode-spread .reader-page-paper{max-width:1180px;margin-inline:auto}}@media (min-width:1400px){.reader-continuous-page{width:min(72vw,980px)}.reader-mode-page .reader-page-paper{max-width:1180px;margin-inline:auto}.reader-mode-spread .reader-page-paper{max-width:1740px;margin-inline:auto}}.reader-shell:fullscreen.reader-mode-scroll .reader-continuous-scroll,.reader-shell:fullscreen.reader-mode-scroll .reader-scroll-wrap.has-native-continuous-scroll{width:100vw;height:100dvh;min-height:100dvh}@media (prefers-reduced-motion:reduce){.reader-continuous-scroll{scroll-behavior:auto}}.reader-page-stage.is-zoomed .reader-page-viewport{touch-action:none;cursor:grab}.reader-page-stage.is-panning .reader-page-viewport{cursor:grabbing;scroll-behavior:auto}.reader-page-stage.is-panning .reader-page-paper,.reader-page-stage.is-pinching .reader-page-paper{transition:none!important}@media (hover:none) and (pointer:coarse){.reader-page-stage.is-zoomed .reader-page-paper[title]{cursor:default}}.reader-book-info small,.reader-book-info span{font-size:13px;line-height:1.35}.reader-book-info strong{font-size:16px}.reader-actions .save-textbook-button.is-compact,.reader-actions a,.reader-actions button,.reader-more-actions summary,.reader-more-actions>div a,.reader-more-actions>div button,.reader-parts a,.reader-parts>span{font-size:13px}.reader-pagination-note{font-size:12px}.reader-assignment-panel>div strong{font-size:14px}.reader-assignment-panel label,.reader-assignment-panel>div small,.reader-mode-switch button,.reader-scroll-hint,.reader-stage-counter,.reader-thumbnails-grid>button>strong,.reader-thumbnails-heading span,.reader-thumbnails-loading,.reader-zoom-controls .reader-zoom-value{font-size:12px}@media (max-width:680px){.reader-mode-switch button:nth-child(2){display:none}.reader-mode-switch button{min-height:38px;font-size:12px}.reader-book-info span{font-size:12px}.reader-book-info strong{font-size:15px;line-height:1.25}.reader-actions .save-textbook-button.is-compact,.reader-actions a,.reader-actions button,.reader-more-actions summary{min-height:42px;font-size:12px}.reader-parts{min-height:46px}.reader-parts a,.reader-parts>span{font-size:12px}.reader-parts a{min-height:36px;padding-inline:13px}.reader-pagination-note{font-size:12px;line-height:1.45}.reader-page-input input{font-size:17px}.reader-stage-counter{min-width:52px;padding:6px 10px;font-size:12px}.reader-thumbnails-grid>button>strong,.reader-thumbnails-heading span,.reader-thumbnails-loading{font-size:12px}}@media (max-width:430px){.reader-header{padding-inline:8px}.reader-book-info{gap:9px}.reader-back{width:42px;height:42px}.reader-actions{gap:5px}.reader-mode-switch{gap:4px;padding:4px}.reader-mode-switch button{min-height:40px}}.textbook-search{position:relative;max-width:680px;margin-top:24px;z-index:8}.textbook-search-box{min-height:58px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding:7px 9px 7px 15px;border:1px solid #cfe0ec;border-radius:16px;background:rgba(255,255,255,.97);box-shadow:0 12px 34px rgba(44,87,124,.1)}.textbook-search-box:focus-within{border-color:#83b9dd;box-shadow:0 0 0 4px rgba(77,157,224,.1),0 14px 34px rgba(44,87,124,.11)}.textbook-search-icon{width:30px;height:30px;display:grid;place-items:center;color:var(--blue-dark);font-size:24px;line-height:1}.textbook-search-box input{min-width:0;width:100%;border:0;outline:0;background:transparent;color:var(--ink);font:inherit}.textbook-search-box input::placeholder{color:#8ba0b0}.textbook-search-box button{width:40px;height:40px;border:0;border-radius:11px;background:#f1f6f9;color:#6b8090;font-size:22px;cursor:pointer}.textbook-search-box button:hover{background:#e8f2f8;color:var(--blue-dark)}.textbook-search-hint{margin:8px 0 0 4px;color:var(--muted);line-height:1.45}.textbook-search-results{position:absolute;inset:calc(100% + 9px) 0 auto 0;max-height:min(560px,62vh);overflow-y:auto;padding:7px;border:1px solid #d7e5ee;border-radius:18px;background:rgba(255,255,255,.99);box-shadow:0 20px 56px rgba(35,69,98,.18)}.textbook-search-loading{min-height:96px;display:grid;place-items:center;padding:20px;color:#60798b;font-size:14px;font-weight:800;text-align:center}.textbook-search-results-count{padding:8px 11px 7px;color:var(--muted);font-size:13px;line-height:1.4}.site-search-quick{display:grid;gap:6px;margin:0 4px 6px;padding-bottom:8px;border-bottom:1px solid #e7eef3}.site-search-quick-result{min-width:0;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:11px;min-height:58px;padding:9px 11px;border:1px solid #dde9f0;border-radius:13px;background:#f8fbfd;color:inherit;text-decoration:none;transition:transform .15s ease,border-color .15s ease,background .15s ease}.site-search-quick-result:focus-visible,.site-search-quick-result:hover{transform:translateY(-1px);border-color:#afd2e6;background:#f2f8fc}.site-search-quick-result>span:nth-child(2){min-width:0;display:flex;flex-direction:column;gap:3px}.site-search-quick-result small,.site-search-quick-result strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.site-search-quick-result strong{color:var(--ink);font-size:14px}.site-search-quick-result small{color:var(--muted);font-size:12px}.site-search-quick-result>b{color:#89a2b4;font-size:17px}.site-search-quick-badge{min-width:76px;display:inline-flex;align-items:center;justify-content:center;min-height:28px;padding:4px 8px;border-radius:999px;background:#eaf5fb;color:var(--blue-dark);font-size:10px;font-weight:900;letter-spacing:.02em}.site-search-quick-result.is-gdz{border-color:#eadfba;background:#fffaf0}.site-search-quick-result.is-gdz:focus-visible,.site-search-quick-result.is-gdz:hover{border-color:#dbc77f;background:#fff7e6}.site-search-quick-result.is-gdz .site-search-quick-badge{background:#fff0c7;color:#805b0c}.textbook-search-result{min-width:0;display:grid;grid-template-columns:42px minmax(0,1fr) auto;gap:12px;padding:11px;border-radius:13px}.textbook-search-result:hover{background:#f4f9fc}.textbook-search-class{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:var(--blue-soft);color:var(--blue-dark);font-weight:900;font-size:16px}.textbook-search-result:nth-child(3n+2) .textbook-search-class{background:var(--cream);color:#916a15}.textbook-search-result:nth-child(3n) .textbook-search-class{background:var(--aqua);color:#357e6b}.textbook-search-result-copy{min-width:0;display:flex;flex-direction:column;gap:3px}.textbook-search-result-copy strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink)}.textbook-search-result-copy small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}.textbook-search-result-copy em{color:var(--blue-dark);font-style:normal;font-weight:750}.textbook-search-enter-hint{width:fit-content;margin-top:2px;padding:2px 6px;border-radius:6px;background:#eef6fb;color:#708b9e;font-weight:750}.textbook-search-arrow{color:#90a8b9;font-size:18px}.textbook-search-all{min-height:46px;display:flex;align-items:center;justify-content:center;margin-top:5px;padding:10px 13px;border-top:1px solid #e7eef3;color:var(--blue-dark);font-size:14px;font-weight:850;text-align:center}.textbook-search-all:hover{background:#f6fafc}.textbook-search-empty{display:flex;flex-direction:column;gap:7px;padding:22px;text-align:center}.textbook-search-empty span{color:var(--muted);line-height:1.5}.textbook-search-empty a{margin-top:4px;color:var(--blue-dark);font-size:14px;font-weight:800}@media (max-width:640px){.textbook-search{margin-top:20px}.textbook-search-box{min-height:56px;border-radius:14px}.textbook-search-box input{font-size:16px}.textbook-search-results{position:absolute;left:0;right:0;top:calc(100% + 8px);bottom:auto;max-height:min(540px,66vh)}.textbook-search-loading{min-height:90px;font-size:14px}.site-search-quick-result{grid-template-columns:auto minmax(0,1fr) auto;gap:8px;padding:9px}.site-search-quick-badge{min-width:60px;padding-inline:7px;font-size:9px}.site-search-quick-result strong{font-size:13px}.site-search-quick-result small{font-size:11px}.textbook-search-result{grid-template-columns:40px minmax(0,1fr) auto;gap:9px;padding:10px}.textbook-search-class{width:40px;height:40px}.textbook-search-result-copy strong{font-size:14px}.textbook-search-result-copy small{font-size:12px}.textbook-search-result-copy em{font-size:11px}.textbook-search-enter-hint{display:none}.textbook-search-results-count{font-size:12px}}.textbook-search-result{grid-template-columns:54px minmax(0,1fr) auto;align-items:center;min-height:86px}.textbook-search-cover{width:54px;aspect-ratio:700/980;overflow:hidden;display:block;border-radius:6px 9px 9px 6px;background:#fff;box-shadow:0 5px 12px rgba(38,69,96,.14)}.textbook-search-cover img{width:100%;height:100%;display:block;object-fit:contain}.textbook-search-result-meta{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:1px}.textbook-search-result-meta b{padding:3px 6px;border-radius:999px;background:#f0f6fa;color:#637b8d;font-size:11px;line-height:1.2;font-weight:800}.textbook-search-result-meta b.is-online{background:#e7f6ef;color:#287e69}.textbook-search-action{color:var(--blue-dark);font-size:13px;font-weight:850;white-space:nowrap}.mobile-search-overlay{display:none}@media (max-width:760px){.textbook-search-result{grid-template-columns:58px minmax(0,1fr);gap:12px;min-height:100px;padding:12px;border-bottom:1px solid #edf2f5;border-radius:0}.textbook-search-result:last-of-type{border-bottom:0}.textbook-search-cover{width:58px}.textbook-search-result-copy{gap:4px}.textbook-search-result-copy strong{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:16px;line-height:1.28}.textbook-search-result-copy small{font-size:13px}.textbook-search-result-copy em{font-size:12px}.textbook-search-action{grid-column:2;justify-self:start;margin-top:-2px;font-size:13px}.textbook-search-results{padding:5px 8px 8px;max-height:min(590px,69vh)}.textbook-search-results-count{padding:9px 8px 8px;font-size:13px}.mobile-search-overlay{position:fixed;z-index:120;inset:0;display:flex;align-items:flex-end;justify-content:center}.mobile-search-backdrop{position:absolute;inset:0;width:100%;height:100%;border:0;background:rgba(21,45,67,.42);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.mobile-search-sheet{position:relative;z-index:1;width:100%;max-height:min(88dvh,860px);display:flex;flex-direction:column;padding:18px 16px max(16px,env(safe-area-inset-bottom));border-radius:24px 24px 0 0;background:#fff;box-shadow:0 -18px 50px rgba(25,57,84,.24)}.mobile-search-sheet:before{content:"";width:42px;height:4px;align-self:center;margin:-7px 0 12px;border-radius:999px;background:#d7e2e9}.mobile-search-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:13px}.mobile-search-head .eyebrow{margin:0 0 4px;font-size:12px}.mobile-search-head h2{margin:0;font-size:25px;line-height:1.1;letter-spacing:-.7px}.mobile-search-close{width:44px;height:44px;flex:0 0 44px;border:0;border-radius:13px;background:#f1f6f9;color:#5e7487;font:inherit;font-size:25px;cursor:pointer}.mobile-search-input-wrap{min-height:58px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:9px;padding:7px 8px 7px 14px;border:2px solid #c8dfea;border-radius:15px;background:#fbfdff}.mobile-search-input-wrap:focus-within{border-color:#78b5db;box-shadow:0 0 0 4px rgba(77,157,224,.11);background:#fff}.mobile-search-input-wrap>span{color:var(--blue-dark);font-size:23px}.mobile-search-input-wrap input{min-width:0;width:100%;border:0;outline:0;background:transparent;color:var(--ink);font:inherit;font-size:17px}.mobile-search-input-wrap input::placeholder{color:#6b8092}.mobile-search-input-wrap button{width:40px;height:40px;border:0;border-radius:11px;background:#edf4f8;color:#607789;font:inherit;font-size:22px}.mobile-search-options{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:10px}.mobile-search-class-filter{min-height:42px;align-self:flex-start;display:inline-flex;align-items:center;gap:8px;margin-top:10px;padding:8px 11px;border:1px solid #d8e5ed;border-radius:999px;background:#f8fbfd;color:#586f82;font:inherit;font-size:13px;font-weight:800}.mobile-search-options .mobile-search-class-filter{margin-top:0}.mobile-search-class-filter.is-active{border-color:#9fc9df;background:var(--blue-soft);color:var(--blue-dark)}.mobile-search-site-link{min-height:42px;display:inline-flex;align-items:center;padding:8px 11px;border:1px solid #eadfba;border-radius:999px;background:#fffaf0;color:#805b0c;font-size:13px;font-weight:850;text-decoration:none}.mobile-search-site-link:active{transform:translateY(1px)}.mobile-search-results{min-height:0;flex:1 1;overflow-y:auto;margin:12px -5px 0;padding:0 5px 4px;overscroll-behavior:contain}.mobile-search-count{padding:4px 4px 10px;color:var(--muted);font-size:13px;line-height:1.4}.mobile-search-result{min-width:0;display:grid;grid-template-columns:64px minmax(0,1fr);gap:13px;align-items:center;padding:12px 4px;border-bottom:1px solid #e9f0f4}.mobile-search-cover{width:64px;aspect-ratio:700/980;overflow:hidden;border-radius:7px 10px 10px 7px;background:#fff;box-shadow:0 5px 13px rgba(37,67,93,.14)}.mobile-search-cover img{width:100%;height:100%;display:block;object-fit:contain}.mobile-search-copy{min-width:0;display:flex;flex-direction:column;gap:4px}.mobile-search-meta{display:flex;flex-wrap:wrap;gap:5px}.mobile-search-meta b{padding:3px 6px;border-radius:999px;background:#f0f6fa;color:#5d7487;font-size:11px;line-height:1.2}.mobile-search-meta b.is-online{background:#e6f6ef;color:#26775f}.mobile-search-copy>strong{display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2;color:var(--ink);font-size:16px;line-height:1.28}.mobile-search-copy>small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:13px}.mobile-search-copy>em{color:var(--blue-dark);font-size:12px;font-style:normal;font-weight:750}.mobile-search-go{grid-column:2;justify-self:start;margin-top:-7px;padding-bottom:7px;font-size:13px}.mobile-search-all,.mobile-search-go{color:var(--blue-dark);font-weight:850}.mobile-search-all{min-height:50px;margin:8px 0 0;border:1px solid #cfe0ea;border-radius:13px;background:#f6fbfe;font-size:14px}.mobile-search-all,.mobile-search-empty-state{display:flex;align-items:center;justify-content:center}.mobile-search-empty-state{min-height:180px;flex-direction:column;gap:7px;padding:24px 16px;text-align:center}.mobile-search-empty-state strong{font-size:18px}.mobile-search-empty-state span{max-width:310px;color:var(--muted);font-size:14px;line-height:1.5}.mobile-search-empty-state a{margin-top:6px;color:var(--blue-dark);font-size:14px;font-weight:850}}.recent-reading{padding-top:34px;padding-bottom:26px}.recent-reading-heading{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}.recent-reading-heading h2{margin:12px 0 0;font-size:30px;letter-spacing:-1px}.recent-reading-heading>a{min-height:40px;display:inline-flex;align-items:center;color:var(--blue-dark);font-size:14px;font-weight:800;padding:6px 4px}.recent-reading-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.recent-reading-card{min-width:0;display:grid;grid-template-columns:58px minmax(0,1fr) auto;align-items:center;gap:14px;padding:15px;border:1px solid #dce8ef;border-radius:18px;background:#fff;box-shadow:0 8px 28px rgba(48,83,116,.05);transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}.recent-reading-card:hover{transform:translateY(-2px);border-color:#a9cde4;box-shadow:0 12px 34px rgba(48,83,116,.09)}.recent-reading-cover{width:58px;aspect-ratio:700/980;display:block;overflow:hidden;border-radius:8px;background:#fff;box-shadow:0 4px 10px rgba(48,83,116,.12)}.recent-reading-cover img{width:100%;height:100%;display:block;object-fit:contain;background:#fff}.recent-reading-copy{min-width:0;display:flex;flex-direction:column;gap:4px}.recent-reading-copy em,.recent-reading-copy small,.recent-reading-page small{color:var(--muted);font-size:12px;line-height:1.35;font-style:normal}.recent-reading-copy strong{font-size:15px;line-height:1.35}.recent-reading-copy em,.recent-reading-copy strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-reading-page{min-width:82px;display:flex;flex-direction:column;align-items:flex-end;gap:3px;padding-left:12px;border-left:1px solid #edf2f5}.recent-reading-page>strong{color:var(--blue-dark);font-size:24px;line-height:1}.recent-reading-page>span{margin-top:5px;color:var(--blue-dark);font-size:12px;font-weight:800}@media (max-width:980px){.recent-reading-grid{grid-template-columns:1fr}}@media (max-width:560px){.recent-reading{padding-top:24px;padding-bottom:12px}.recent-reading-heading{align-items:flex-start;flex-direction:column;gap:5px}.recent-reading-heading h2{font-size:25px}.recent-reading-card{grid-template-columns:50px minmax(0,1fr) auto;gap:10px;padding:12px}.recent-reading-cover{width:50px}.recent-reading-copy strong{font-size:14px}.recent-reading-copy em,.recent-reading-copy small,.recent-reading-page small,.recent-reading-page>span{font-size:11px}.recent-reading-page{min-width:68px;padding-left:9px}.recent-reading-page>strong{font-size:21px}}.class-button{display:block;min-height:82px;text-align:center;outline:none}.class-button:focus-visible{border-color:#73afd4;box-shadow:0 0 0 4px rgba(77,157,224,.14)}.class-button small{display:block;margin-top:7px;color:#8095a6;font-weight:750;letter-spacing:.01em}.class-button.is-active small{color:rgba(255,255,255,.82)}@media (max-width:560px){.class-button{min-height:78px}.class-button small{font-size:11px}}.class-catalog-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0 0 24px}.class-catalog-stats.has-gdz{grid-template-columns:repeat(4,minmax(0,1fr))}.class-catalog-stats>div{min-width:0;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;align-items:center;column-gap:10px;padding:16px 18px;border:1px solid #deebf2;border-radius:16px;background:#fbfdff}.class-catalog-stats.has-gdz>div:last-child{border-color:#d9e7c9;background:#fbfdf7}.class-catalog-stats small{grid-column:1/-1;margin-bottom:5px;color:var(--muted);font-size:14px;font-weight:750}.class-catalog-stats strong{color:var(--ink);font-size:30px;line-height:1;letter-spacing:-.8px}.class-catalog-stats span{align-self:end;color:var(--muted);font-size:14px;line-height:1.25}.catalog-class-search>div>p{max-width:420px;margin:12px 0 0;color:var(--muted);font-size:15px;line-height:1.55}.class-neighbor-nav{margin-top:52px;padding-top:44px;border-top:1px solid #e5edf2}.class-neighbor-nav .section-heading{margin-bottom:22px}.class-neighbor-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.class-neighbor-grid a{min-width:0;min-height:92px;display:flex;flex-direction:column;justify-content:center;gap:3px;padding:14px 15px;border:1px solid #dce8ef;border-radius:15px;background:#fff;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}.class-neighbor-grid a:hover{transform:translateY(-2px);border-color:#a9cde2;box-shadow:0 9px 22px rgba(48,83,116,.07)}.class-neighbor-grid strong{color:var(--ink);font-size:17px;line-height:1.25}.class-neighbor-grid span{color:var(--muted);font-size:14px;line-height:1.35}.class-neighbor-grid small{color:#28785f;font-size:13px;font-weight:800}@media (max-width:980px){.class-catalog-stats.has-gdz{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:900px){.class-neighbor-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:700px){.class-catalog-stats,.class-catalog-stats.has-gdz{grid-template-columns:1fr;gap:8px}.class-catalog-stats>div{grid-template-columns:minmax(130px,1fr) auto;grid-template-rows:auto;padding:13px 15px}.class-catalog-stats small{grid-column:auto;margin:0}.class-catalog-stats strong{font-size:24px;text-align:right}.class-catalog-stats span{display:none}.class-neighbor-nav{margin-top:40px;padding-top:36px}}@media (max-width:560px){.class-neighbor-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.class-neighbor-grid a{min-height:82px;padding:12px 13px}.class-neighbor-grid strong{font-size:16px}.class-neighbor-grid span{font-size:13px}}.directory-hero .catalog-hero-inner{padding-bottom:54px}.directory-class-nav{display:grid;grid-template-columns:minmax(220px,.55fr) minmax(0,1.45fr);align-items:start;gap:28px;padding-top:34px}.directory-class-nav h2{margin:11px 0 0;font-size:clamp(26px,3vw,36px);line-height:1.1;letter-spacing:-1px}.directory-class-links{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.directory-class-links a{min-width:0;min-height:66px;display:flex;flex-direction:column;justify-content:center;gap:4px;padding:11px 12px;border:1px solid #dce8ef;border-radius:14px;background:#fff;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}.directory-class-links a:hover{transform:translateY(-2px);border-color:#a9cde2;box-shadow:0 9px 20px rgba(48,83,116,.07)}.directory-class-links strong{color:var(--ink);font-size:16px}.directory-class-links span{color:var(--muted);font-size:13px;line-height:1.35}.directory-section{padding-top:42px}.directory-controls{position:sticky;top:10px;z-index:4;display:grid;grid-template-columns:minmax(270px,1.35fr) minmax(125px,.45fr) minmax(175px,.68fr) minmax(175px,.65fr) minmax(145px,.52fr);gap:12px;padding:14px;margin-bottom:18px;border:1px solid #dce8ef;border-radius:18px;background:rgba(255,255,255,.96);box-shadow:0 10px 32px rgba(48,83,116,.08);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.directory-controls label,.directory-summary-tools label{display:flex;flex-direction:column;gap:6px}.directory-controls label>span,.directory-summary-tools label>span{color:var(--muted);font-size:12px;font-weight:850;text-transform:uppercase;letter-spacing:.04em}.directory-controls input,.directory-controls select,.directory-summary-tools select{width:100%;min-height:46px;border:1px solid #d4e3ec;border-radius:12px;background:#fbfdff;color:var(--ink);padding:10px 12px;font:inherit;font-size:15px;outline:none}.directory-controls input:focus,.directory-controls select:focus,.directory-summary-tools select:focus{border-color:#85bde0;box-shadow:0 0 0 3px rgba(84,163,215,.12);background:white}.directory-summary{min-height:48px;display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}.directory-summary>div:first-child{display:flex;align-items:baseline;gap:7px;color:var(--muted)}.directory-summary strong{color:var(--ink);font-size:24px}.directory-summary span{line-height:1.4}.directory-summary-tools{display:flex;align-items:end;justify-content:flex-end;gap:10px}.directory-summary-tools label{min-width:220px}.directory-summary-tools select{min-height:42px;padding-block:8px}.directory-empty button,.directory-summary button{min-height:44px;border:0;border-radius:10px;background:transparent;color:var(--blue-dark);padding:9px 11px;font:inherit;font-weight:800;cursor:pointer}.directory-empty button:hover,.directory-summary button:hover{background:var(--blue-soft)}.directory-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.directory-book{min-width:0;display:flex;flex-direction:column;padding:14px;border:1px solid var(--line);border-radius:20px;background:white;box-shadow:0 8px 24px rgba(48,83,116,.04);transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.directory-book:hover{transform:translateY(-3px);border-color:#b8d6e8;box-shadow:0 15px 34px rgba(48,83,116,.09)}.directory-cover{width:min(100%,190px);aspect-ratio:700/980;align-self:center;overflow:hidden;border-radius:10px 14px 14px 10px;background:white;box-shadow:0 12px 24px rgba(31,66,96,.16)}.directory-cover img{width:100%;height:100%;display:block;object-fit:contain;background:white}.directory-book-copy{min-width:0;display:flex;flex:1 1;flex-direction:column;padding:15px 2px 1px}.directory-book-meta{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:9px}.directory-book-meta span{padding:4px 7px;border-radius:999px;background:#f1f7fa;color:#61798b;line-height:1.25;font-weight:800}.directory-book-meta span:first-child{background:#e8f6f1;color:#2f826d}.directory-book-meta .directory-online-badge{background:#eaf5ff;color:var(--blue-dark)}.directory-book-meta .directory-gdz-badge{background:#edf8ef;color:#2f7a44}.directory-book h2{margin:0 0 7px;font-size:18px;line-height:1.24;letter-spacing:-.35px}.directory-book h2 a:hover{color:var(--blue-dark)}.directory-book p{margin:0;color:var(--muted);line-height:1.48}.directory-book-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;padding-top:15px}.directory-book-actions .textbook-primary,.directory-book-actions .textbook-secondary{min-height:44px;padding:10px 12px;font-size:13px}.directory-book-actions .directory-gdz-link{border-color:#c8e4cf;background:#f3fbf5;color:#2f7a44}.directory-book-actions .directory-gdz-link:hover{border-color:#a7d4b2;background:#eaf7ed}.directory-load-more{display:flex;flex-direction:column;align-items:center;gap:8px;padding-top:28px}.directory-load-more button{min-height:48px;border:1px solid #bfd9e8;border-radius:12px;background:#f7fbfe;color:var(--blue-dark);padding:10px 22px;font:inherit;font-size:15px;font-weight:800;cursor:pointer}.directory-load-more button:hover:not(:disabled){border-color:#8fbfdb;background:#eef7fc}.directory-load-more button:disabled{cursor:wait;opacity:.65}.directory-load-more a,.directory-load-more span{color:var(--muted);font-size:13px}.directory-load-more a:hover{color:var(--blue-dark)}.directory-empty{min-height:250px;display:grid;place-items:center;align-content:center;gap:7px;padding:32px;border:1px dashed #cddde7;border-radius:20px;background:#fbfdfe;text-align:center}.directory-empty>span{color:#89a5b7;font-size:36px}.directory-empty h2{margin:0;font-size:22px}.directory-empty p{max-width:520px;margin:0;color:var(--muted);line-height:1.55}.directory-loading{opacity:.85}.directory-book-publisher{color:#7a8997!important}.directory-active-filters{margin:-6px 0 16px}.directory-active-filters button{min-height:34px;border:1px solid #d7e4ec;padding:6px 10px}.directory-active-filters button:hover{border-color:#b7d4e5;background:#edf6fb}@media (max-width:1120px){.directory-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.directory-class-links{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (max-width:900px){.directory-controls{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}.directory-search{grid-column:1/-1}.directory-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.directory-class-nav{grid-template-columns:1fr;gap:18px}.directory-class-links{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (max-width:640px){.directory-section{padding-top:28px}.directory-controls{grid-template-columns:1fr;gap:10px;padding:11px;border-radius:14px}.directory-search{grid-column:auto}.directory-controls input,.directory-controls select{min-height:48px;font-size:16px}.directory-summary{align-items:stretch;flex-direction:column;gap:10px}.directory-summary>div:first-child{flex-wrap:wrap}.directory-summary-tools{justify-content:stretch}.directory-summary-tools label{min-width:0;flex:1 1}.directory-grid{grid-template-columns:1fr;gap:14px}.directory-book{display:grid;grid-template-columns:116px minmax(0,1fr);gap:13px;padding:12px}.directory-cover{width:116px;align-self:start}.directory-book-copy{padding:2px 0 0}.directory-book h2{font-size:17px}.directory-book-actions{padding-top:12px}.directory-book-actions .textbook-primary,.directory-book-actions .textbook-secondary{flex:1 1 auto;justify-content:center;min-height:44px}.directory-class-links{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:410px){.directory-book{grid-template-columns:100px minmax(0,1fr)}.directory-cover{width:100px}.directory-book-actions{grid-column:1/-1}}.directory-active-filters{gap:8px}.directory-active-filters>span{font-size:13px;font-weight:800}.directory-active-filters button{min-height:36px;border:1px solid #d4e3ec;background:#f8fbfd;color:var(--blue-dark);font-weight:800}.directory-active-filters button:hover{border-color:#a7cde4}#catalog-filters{scroll-margin-top:18px}.directory-book{content-visibility:auto;contain-intrinsic-size:520px}.directory-grid{transition:opacity .12s ease}.directory-grid[aria-busy=true]{opacity:.72}.directory-book-publisher{margin-top:4px!important;color:#73879a!important}.directory-book-actions .save-textbook-button.is-compact{min-height:44px;flex:1 1 100%;padding:9px 11px;font-size:13px}.directory-book:has(.save-textbook-button.is-saved){border-color:#e1ca79;box-shadow:0 12px 30px rgba(135,103,18,.09)}.directory-book:has(.save-textbook-button.is-saved) .directory-book-copy:before{content:"★ Мій підручник";width:fit-content;margin-bottom:9px;padding:5px 8px;border-radius:999px;background:#fff7d7;color:#80610e;font-size:12px;font-weight:850}@media (hover:none),(pointer:coarse){.directory-book:hover{transform:none}}@media (max-width:840px){.directory-active-filters{margin-top:-2px}}@media (max-width:560px){.directory-active-filters{overflow-x:auto;flex-wrap:nowrap;margin-inline:-2px;padding:0 2px 4px;scrollbar-width:none}.directory-active-filters::-webkit-scrollbar{display:none}.directory-active-filters button,.directory-active-filters>span{flex:0 0 auto}.directory-book{contain-intrinsic-size:220px}.directory-book-actions{display:grid;grid-template-columns:1fr 1fr}.directory-book-actions .save-textbook-button.is-compact{grid-column:1/-1;width:100%}.directory-summary>div:first-child{flex-wrap:wrap;row-gap:2px}}@media (prefers-reduced-motion:reduce){.directory-grid{transition:none}}.home-class-dashboard{transform:rotate(.35deg)}.home-class-dashboard-body{min-height:330px}.home-dashboard-loading{min-height:290px;display:grid;place-items:center;color:var(--muted);font-size:15px}.home-dashboard-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:14px}.home-dashboard-head small{display:block;margin-bottom:4px;color:var(--muted);font-size:13px;font-weight:750}.home-dashboard-head .mini-title{margin:0}.home-dashboard-head>div>span{display:block;margin-top:3px;color:var(--blue-dark);font-size:13px;font-weight:800}.home-dashboard-head>a{flex:0 0 auto;min-height:38px;display:inline-flex;align-items:center;padding:6px 8px;color:var(--blue-dark);font-size:14px;font-weight:800}.home-profile-switcher{display:flex;gap:7px;overflow-x:auto;padding:1px 1px 10px;scrollbar-width:none}.home-profile-switcher::-webkit-scrollbar{display:none}.home-profile-switcher button{min-width:92px;min-height:44px;display:flex;align-items:center;gap:7px;border:1px solid #deebf2;border-radius:10px;padding:8px 10px;background:#fff;color:var(--ink);cursor:pointer}.home-profile-switcher button.is-active{border-color:#9bc9e8;background:var(--blue-soft);color:var(--blue-dark)}.home-profile-switcher strong{font-size:17px}.home-profile-switcher span{max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:750}.home-dashboard-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:0 0 12px}.home-dashboard-stats>a{min-width:0;min-height:62px;display:flex;flex-direction:column;justify-content:center;gap:3px;padding:10px 11px;border:1px solid #dceaf2;border-radius:11px;background:rgba(255,255,255,.9);transition:transform .15s ease,border-color .15s ease,background .15s ease}.home-dashboard-stats>a:hover{transform:translateY(-1px);border-color:#9fcce7;background:#fff}.home-dashboard-stats>a.is-attention{border-color:#f0dba3;background:#fffaf0}.home-dashboard-stats strong{overflow:hidden;color:var(--ink);font-size:20px;line-height:1;text-overflow:ellipsis}.home-dashboard-stats span{overflow:hidden;color:var(--muted);font-size:11px;font-weight:750;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.home-dashboard-actions{margin:0 0 12px}.home-dashboard-actions-label{display:block;margin:0 0 6px;color:var(--muted);font-size:10px;font-weight:850;letter-spacing:.045em;text-transform:uppercase}.home-dashboard-action-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.home-dashboard-action-grid>a{min-width:0;padding:10px 11px;border:1px solid #dceaf2;border-radius:11px;background:#f8fbfd;transition:transform .15s ease,border-color .15s ease,background .15s ease}.home-dashboard-action-grid>a:hover{transform:translateY(-1px);border-color:#9fcce7;background:#fff}.home-dashboard-action-grid span,.home-dashboard-action-grid strong{display:block}.home-dashboard-action-grid strong{overflow:hidden;color:var(--blue-dark);font-size:12px;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.home-dashboard-action-grid span{margin-top:3px;color:var(--muted);font-size:10px;line-height:1.35}.home-dashboard-books{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.home-dashboard-books>a{min-width:0;display:flex;flex-direction:column;gap:8px;padding:10px;border:1px solid #e3edf3;border-radius:12px;background:#fff;transition:transform .15s ease,border-color .15s ease}.home-dashboard-books>a:hover{transform:translateY(-2px);border-color:#acd0e6}.home-dashboard-cover{width:100%;aspect-ratio:700/980;overflow:hidden;border-radius:8px;background:#fff;box-shadow:0 4px 12px rgba(48,83,116,.12)}.home-dashboard-cover img{width:100%;height:100%;display:block;object-fit:contain}.home-dashboard-book-copy{min-width:0;display:flex;flex-direction:column;gap:4px}.home-dashboard-book-copy small{color:var(--blue-dark);font-size:12px;font-weight:850}.home-dashboard-book-copy strong{display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2;font-size:14px;line-height:1.3}.home-dashboard-book-copy em{color:var(--muted);font-size:12px;font-style:normal;font-weight:700}.home-dashboard-empty{min-height:184px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:26px;border:1px dashed #cadfe9;border-radius:14px;background:rgba(255,255,255,.65);text-align:center}.home-dashboard-empty strong{font-size:16px}.home-dashboard-empty span,.home-dashboard-intro{max-width:340px;margin:0;color:var(--muted);font-size:14px;line-height:1.5}.home-dashboard-class-links{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px}.home-dashboard-class-links a{min-height:78px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border:1px solid #dce9f0;border-radius:12px;background:#fff}.home-dashboard-class-links a:hover{border-color:#9dc9e5;background:var(--blue-soft)}.home-dashboard-class-links strong{font-size:27px;line-height:1}.home-dashboard-class-links span{color:var(--muted);font-size:12px;font-weight:750}.home-dashboard-footer{align-items:center;font-size:13px}.home-dashboard-footer a{color:var(--ink);font-weight:850}.home-featured-cover{height:240px;display:block;overflow:hidden;background:#f7fafc}.home-featured-cover img{width:100%;height:100%;display:block;object-fit:contain;background:white}@media (max-width:640px){.home-class-dashboard{transform:none}.home-dashboard-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.home-dashboard-stats>a{min-height:58px;padding:9px 8px}.home-dashboard-stats strong{font-size:18px}.home-dashboard-stats span{font-size:10px}.home-dashboard-action-grid{grid-template-columns:1fr;gap:6px}.home-dashboard-action-grid>a{padding:9px 10px}.home-dashboard-action-grid span{font-size:10px}.home-dashboard-books{grid-template-columns:1fr}.home-dashboard-books>a{display:grid;grid-template-columns:78px minmax(0,1fr);align-items:center}.home-dashboard-cover{width:78px}.home-dashboard-book-copy strong{font-size:15px}.home-dashboard-book-copy em,.home-dashboard-book-copy small{font-size:12px}.home-dashboard-class-links{grid-template-columns:repeat(3,1fr)}.home-featured-cover{height:210px}}.home-subject-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:-8px 0 18px;padding:13px 15px;border:1px solid #dcebf2;border-radius:14px;background:rgba(255,255,255,.82);color:var(--muted);font-size:14px;line-height:1.45}.home-subject-bar strong{color:var(--ink)}.home-subject-bar a{color:var(--blue-dark);font-weight:800}.home-subject-card{min-height:118px;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}.home-subject-card:hover{transform:translateY(-2px);border-color:#aacfe5;box-shadow:0 12px 28px rgba(48,83,116,.08)}.home-subject-card .subject-icon{font-size:16px;letter-spacing:-.4px}.home-subject-card h3{font-size:19px;line-height:1.3}.home-subject-card p{font-size:14px;line-height:1.45}.home-subject-online{color:#2f826d;font-weight:800}.home-subject-empty{min-height:180px;display:flex;align-items:center;justify-content:space-between;gap:34px;padding:30px;border:1px dashed #cbdfe9;border-radius:20px;background:rgba(255,255,255,.72)}.home-subject-empty h3{margin:12px 0 8px;font-size:24px;line-height:1.15;letter-spacing:-.6px}.home-subject-empty p{max-width:600px;margin:0;color:var(--muted);font-size:16px;line-height:1.55}.home-subject-empty .primary-button{flex:0 0 auto}@media (max-width:760px){.home-subject-bar{align-items:flex-start;flex-direction:column;gap:7px;font-size:14px}.home-subject-card{min-height:104px}.home-subject-card h3{font-size:18px}.home-subject-card p{font-size:14px}.home-subject-empty{align-items:stretch;flex-direction:column;gap:22px;padding:24px}}.mobile-nav,.mobile-nav-spacer{display:none}@media (max-width:760px){.mobile-nav-spacer{display:block;height:84px}.mobile-nav{position:fixed;z-index:80;left:10px;right:10px;bottom:max(8px,env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:3px;padding:6px;border:1px solid rgba(207,224,235,.95);border-radius:18px;background:rgba(255,255,255,.97);box-shadow:0 12px 34px rgba(30,65,95,.18);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.mobile-nav a,.mobile-nav button{min-width:0;min-height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border:0;border-radius:13px;background:transparent;color:#5f7488;padding:0 2px;font:inherit;cursor:pointer}.mobile-nav a>span,.mobile-nav button>span{font-size:19px;line-height:1;font-weight:850}.mobile-nav a>small,.mobile-nav button>small{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:10px;line-height:1.15;font-weight:800}.mobile-nav a.is-active,.mobile-nav button.is-active{background:var(--blue-soft);color:var(--blue-dark)}.mobile-nav a:active,.mobile-nav button:active{transform:translateY(1px)}}@media (max-width:390px){.mobile-nav-spacer{height:78px}.mobile-nav{left:6px;right:6px;gap:2px;padding:4px;border-radius:16px}.mobile-nav a,.mobile-nav button{min-height:54px;gap:3px;border-radius:11px;padding-inline:1px}.mobile-nav a>span,.mobile-nav button>span{font-size:17px}.mobile-nav a>small,.mobile-nav button>small{font-size:9px;letter-spacing:-.01em}}body{font-size:16px;line-height:1.5}.brand-text small{font-size:13px}.main-nav{font-size:16px}.header-action,.header-library-link{font-size:15px}.eyebrow{font-size:14px}.hero-trust{font-size:15px}.fake-search,.mini-books b{font-size:13px}.mini-books small{font-size:12px;line-height:1.4}.mini-schedule{font-size:13px}.section-heading p,.split-heading>p{font-size:17px}.class-button span{font-size:13px}.class-button small{font-size:12px;line-height:1.35;min-height:16px}.class-note{font-size:15px}.subject-card h3{font-size:18px}.subject-card p{font-size:15px;line-height:1.5}.book-info>span{font-size:13px}.book-info h3{font-size:20px;line-height:1.3}.book-info p{line-height:1.55}.book-info p,.steps b{font-size:15px}.steps small{font-size:14px;line-height:1.4}.footer-inner{min-height:0;grid-template-columns:1fr;gap:16px;padding-block:30px;font-size:15px}.footer-links{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;line-height:1.5}.footer-links a,.footer-sources a{color:var(--blue-dark);font-weight:750}.footer-links a:hover,.footer-sources a:hover{text-decoration:underline;text-underline-offset:3px}.footer-catalog-link{font-weight:850!important}.footer-link-label{color:var(--muted);font-weight:750}.footer-sources{margin:0;line-height:1.55}.footer-copy,.footer-sources{color:var(--muted);font-size:14px}.catalog-subject-mark{font-size:14px}.catalog-subject-card strong{font-size:17px;line-height:1.35}.catalog-subject-card small{font-size:14px;line-height:1.45}.breadcrumbs{font-size:14px}.catalog-hero-actions a{min-height:44px;font-size:15px}.official-source-note p{font-size:15px}.official-badge{font-size:12px}.official-source-links a{min-height:44px;font-size:14px}.catalog-availability-note strong{font-size:15px}.catalog-availability-note small{font-size:14px}.textbook-meta span{font-size:13px}.textbook-authors{font-size:15px}.textbook-primary,.textbook-secondary{min-height:44px;font-size:14px}.class-personal-topline strong{font-size:15px}.class-personal-saved,.class-personal-topline button{min-height:42px;font-size:14px}.class-personal-heading p,.class-personal-heading>a{font-size:14px;line-height:1.5}.class-personal-copy small{font-size:12px}.class-personal-copy strong{font-size:15px;line-height:1.35}.class-personal-copy em,.class-personal-copy>span{font-size:13px}.catalog-coming-subjects summary strong,.catalog-coming-subjects>p,.class-personal-empty{font-size:14px}.textbook-detail-authors{font-size:18px!important}.textbook-reader-note{font-size:14px!important}.textbook-local-note{font-size:14px;line-height:1.55}.textbook-facts small{font-size:13px}.source-explainer p,.textbook-facts strong{font-size:16px}.source-explainer>a{min-height:40px;display:inline-flex;align-items:center;font-size:15px}.detail-secondary-button{min-height:48px;font-size:15px}.save-textbook-button.is-compact{min-height:42px;font-size:13px}.textbook-search-box input{font-size:16px}.textbook-search-hint{font-size:13px}.textbook-search-result-copy strong{font-size:15px}.textbook-search-result-copy small{font-size:13px}.textbook-search-result-copy em{font-size:12px}.textbook-search-enter-hint{font-size:11px}.textbook-search-empty strong{font-size:16px}.textbook-search-empty span{font-size:14px}.directory-controls label>span{font-size:12px}.directory-controls input,.directory-controls select{min-height:48px;font-size:15px}.directory-search small{color:var(--muted);font-size:13px;line-height:1.45}.directory-summary span{font-size:14px}.directory-empty button,.directory-summary button{min-height:40px;font-size:14px}.directory-book-meta span{font-size:12px}.directory-book h2{font-size:19px}.directory-book p{font-size:14px;line-height:1.55}.directory-book-actions .textbook-primary,.directory-book-actions .textbook-secondary{min-height:42px;font-size:14px}.my-books-profile-current small,.my-books-profile-current>span,.my-books-profile-note,.my-books-profile-switcher span{font-size:13px}.my-book-content p,.my-books-class-heading>a,.my-books-profile-bar>a{font-size:14px}.my-book-progress{font-size:13px}.my-book-actions button{min-height:40px;font-size:14px}.family-inline-link{font-size:15px}.family-profile-main small{font-size:14px}.family-profile-main em{font-size:13px}.family-profile-actions{font-size:14px}.family-active-note{font-size:14px;line-height:1.45}.family-add-card label{font-size:15px}.family-add-card label small{font-size:13px;line-height:1.45}.family-add-card>p{font-size:14px}.family-add-card input,.family-add-card select{min-height:48px;font-size:16px}@media (max-width:760px){.brand-text small{font-size:12px}.eyebrow{font-size:13px}.header-library-link{display:none}.header-action{min-height:42px;font-size:14px;padding:10px 12px}.textbook-detail-authors{font-size:16px!important}.footer-inner{padding-block:24px}}@media (max-width:600px){.catalog-hero p{font-size:16px}.textbook-content h2{font-size:19px}.textbook-authors{font-size:14px}.textbook-primary,.textbook-secondary{min-height:46px;font-size:15px}.catalog-subject-card small{font-size:13px}.directory-book h2{font-size:17px}.directory-book p{font-size:14px}.directory-book-actions .textbook-primary,.directory-book-actions .textbook-secondary{min-height:44px;font-size:14px}.textbook-search-box input{font-size:16px}.class-button small{font-size:11px}.footer-links{gap:7px 12px}}:root{--muted:#5d7286}input::placeholder,textarea::placeholder{color:#62778a;opacity:1}.class-button small{color:#62778a}.class-button.is-active small{color:rgba(255,255,255,.9)}.fake-search{color:#62778a}.subject-catalog-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:18px}.subject-catalog-summary.has-gdz{grid-template-columns:repeat(4,minmax(0,1fr))}.subject-catalog-summary>div{min-width:0;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:10px;align-items:center;padding:16px 18px;border:1px solid #deebf2;border-radius:16px;background:#fbfdff}.subject-catalog-summary.has-gdz>div:last-child{border-color:#d9e7c9;background:#fbfdf7}.subject-catalog-summary small{grid-column:1/-1;margin-bottom:5px;color:var(--muted);font-size:13px;font-weight:750}.subject-catalog-summary strong{color:var(--ink);font-size:28px;line-height:1;letter-spacing:-.8px}.subject-catalog-summary span{align-self:end;color:var(--muted);font-size:14px;line-height:1.25}.subject-edition-guide{display:grid;grid-template-columns:minmax(0,.9fr) minmax(420px,1.1fr);gap:26px;align-items:center;margin:22px 0 18px;padding:22px 24px;border:1px solid #dce9f1;border-radius:20px;background:linear-gradient(135deg,#f8fcff,#fbfdf9)}.subject-edition-guide h2{margin:9px 0 8px;font-size:clamp(24px,2.8vw,32px);line-height:1.1;letter-spacing:-.8px}.subject-edition-guide p{margin:0;color:var(--muted);font-size:15px;line-height:1.55}.subject-edition-guide ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:0;padding:0;list-style:none}.subject-edition-guide li{min-width:0;display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;align-items:start;padding:12px;border:1px solid #e0ebf2;border-radius:14px;background:rgba(255,255,255,.92)}.subject-edition-guide li>b{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:var(--blue-soft);color:var(--blue-dark);font-size:14px}.subject-edition-guide li>span{min-width:0;display:flex;flex-direction:column;gap:2px}.subject-edition-guide li strong{color:var(--ink);font-size:14px}.subject-edition-guide li small{color:var(--muted);font-size:12px;line-height:1.4}.textbook-edition-facts{display:flex;flex-wrap:wrap;gap:7px 12px;margin:2px 0 12px}.textbook-edition-facts>div{min-width:0;display:inline-flex;align-items:baseline;gap:5px}.textbook-edition-facts dt{color:var(--muted);font-size:12px;font-weight:700}.textbook-edition-facts dd{min-width:0;margin:0;color:var(--ink);font-size:13px;font-weight:800}.subject-current-heading{margin-top:38px;margin-bottom:22px}.subject-current-heading h2{max-width:780px}.textbook-meta .textbook-latest-badge{background:#fff6d6;color:#896811}.textbook-meta .textbook-gdz-badge{display:inline-flex;align-items:center;min-height:28px;padding:5px 9px;border:1px solid #cfe1bb;border-radius:999px;background:#f4faeb;color:#4b6f24;font-size:12px;font-weight:850;line-height:1;text-decoration:none}.textbook-meta .textbook-gdz-badge:hover{border-color:#a8c884;background:#edf7df}.catalog-older-editions{margin-top:30px;padding:0;border:1px solid #dfe9f0;border-radius:20px;background:#fbfdff;overflow:hidden}.catalog-older-editions>summary{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 20px;cursor:pointer;list-style:none;color:var(--ink)}.catalog-older-editions>summary::-webkit-details-marker{display:none}.catalog-older-editions>summary:after{content:"+";flex:0 0 34px;width:34px;height:34px;display:grid;place-items:center;margin-left:auto;border-radius:10px;background:var(--blue-soft);color:var(--blue-dark);font-size:22px;font-weight:800}.catalog-older-editions[open]>summary:after{content:"−"}.catalog-older-editions>summary span{font-size:18px;font-weight:850}.catalog-older-editions>summary strong{color:var(--muted);font-size:14px;font-weight:750}.catalog-older-editions>p{max-width:760px;margin:-4px 20px 20px;color:var(--muted);font-size:15px;line-height:1.55}.older-edition-groups{display:grid;gap:26px;padding:0 20px 22px}.older-edition-group{min-width:0}.older-edition-group+.older-edition-group{padding-top:24px;border-top:1px solid #e5edf2}.older-edition-year-heading{display:flex;align-items:baseline;gap:10px;margin-bottom:14px}.older-edition-year-heading h3{margin:0;color:var(--ink);font-size:23px;line-height:1.1;letter-spacing:-.5px}.older-edition-year-heading span{color:var(--muted);font-size:13px;font-weight:750}.subject-official-source{margin-top:48px;margin-bottom:0}.subject-sibling-nav{margin-top:42px;padding-top:42px;border-top:1px solid #e8eff4}.subject-sibling-nav h2{margin:12px 0 20px;font-size:clamp(28px,3.4vw,38px);line-height:1.1;letter-spacing:-1px}.subject-sibling-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.subject-sibling-links a{min-width:0;min-height:70px;display:flex;flex-direction:column;justify-content:center;gap:4px;padding:13px 15px;border:1px solid #dce8ef;border-radius:14px;background:#fff;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}.subject-sibling-links a:hover{transform:translateY(-2px);border-color:#a9cde2;box-shadow:0 9px 22px rgba(48,83,116,.07)}.subject-sibling-links strong{color:var(--ink);font-size:16px;line-height:1.3}.subject-sibling-links span{color:var(--muted);font-size:13px}@media (max-width:980px){.subject-catalog-summary.has-gdz{grid-template-columns:repeat(2,minmax(0,1fr))}.subject-edition-guide{grid-template-columns:1fr}}@media (max-width:900px){.subject-sibling-links{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:760px){.subject-catalog-summary,.subject-catalog-summary.has-gdz{grid-template-columns:1fr;gap:8px}.subject-catalog-summary>div{grid-template-columns:minmax(130px,1fr) auto;grid-template-rows:auto;padding:13px 15px}.subject-catalog-summary small{grid-column:auto;margin:0;font-size:14px}.subject-catalog-summary strong{font-size:22px;text-align:right}.subject-catalog-summary span{display:none}.subject-edition-guide{gap:18px;padding:18px}.subject-edition-guide p{font-size:14px}.subject-edition-guide ol{grid-template-columns:1fr}.subject-edition-guide li{min-height:60px;align-items:center}.subject-edition-guide li strong{font-size:15px}.subject-edition-guide li small{font-size:13px}.textbook-edition-facts{margin-bottom:10px}.textbook-edition-facts dt{font-size:12px}.textbook-edition-facts dd{font-size:13px}.textbook-meta .textbook-gdz-badge{min-height:30px;font-size:13px}.subject-current-heading{margin-top:32px}.catalog-older-editions>summary{min-height:62px;padding:14px 16px}.catalog-older-editions>summary span{font-size:16px}.catalog-older-editions>summary strong{display:none}.catalog-older-editions>p{margin:-2px 16px 16px;font-size:14px}.older-edition-groups{gap:22px;padding:0 12px 14px}.older-edition-group+.older-edition-group{padding-top:20px}.older-edition-year-heading{margin:0 4px 12px}.older-edition-year-heading h3{font-size:20px}.subject-official-source{margin-top:38px}.subject-sibling-nav{margin-top:34px;padding-top:34px}}@media (max-width:560px){.subject-sibling-links{grid-template-columns:1fr}.subject-sibling-links a{min-height:62px}}.skip-link{position:fixed;z-index:200;top:10px;left:10px;transform:translateY(-140%);min-height:44px;display:inline-flex;align-items:center;padding:10px 14px;border-radius:10px;background:#17324d;color:#fff;font-size:15px;font-weight:800;box-shadow:0 10px 28px rgba(23,50,77,.24);transition:transform .14s ease}.skip-link:focus{transform:translateY(0)}[id]{scroll-margin-top:24px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,textarea:focus-visible{outline:3px solid rgba(47,120,183,.42);outline-offset:3px}a:focus-visible,button:focus-visible,summary:focus-visible{border-radius:8px}#main-content:focus{outline:none}@media (max-width:760px){[id]{scroll-margin-top:16px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.directory-active-filters{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin:-4px 0 18px}.directory-active-filters>span{color:var(--muted);font-size:14px;font-weight:750}.directory-active-filters button{min-height:38px;border:1px solid #d7e6ee;border-radius:999px;padding:7px 11px;background:#f7fbfd;color:var(--ink);font:inherit;font-size:13px;font-weight:750;cursor:pointer}.directory-active-filters button:hover{border-color:#a8cee4;background:var(--blue-soft);color:var(--blue-dark)}.directory-book-publisher{margin-top:5px!important;color:#708496!important;font-size:13px!important}.directory-book,.textbook-card,.textbook-related-card{content-visibility:auto;contain-intrinsic-size:320px}@media (max-width:620px){.textbook-card{grid-template-columns:108px minmax(0,1fr);gap:15px;padding:13px}.textbook-card .textbook-cover{width:108px}.textbook-card .textbook-content h2{font-size:18px;line-height:1.28}.textbook-card .textbook-authors{font-size:14px;line-height:1.45}.textbook-card .textbook-meta span{font-size:12px}.textbook-card .textbook-actions{gap:7px}.textbook-card .textbook-secondary{display:none}.textbook-card .save-textbook-button.is-compact,.textbook-card .textbook-primary{width:auto;flex:1 1 120px;min-height:46px;font-size:14px}.directory-book .textbook-secondary{display:none}.directory-book-actions .save-textbook-button.is-compact,.directory-book-actions .textbook-primary{width:auto;flex:1 1 110px;min-height:46px;font-size:14px}.directory-book-publisher{font-size:13px!important}}@media (max-width:640px){.directory-active-filters{margin-bottom:15px;overflow-x:auto;flex-wrap:nowrap;padding-bottom:2px;scrollbar-width:none}.directory-active-filters::-webkit-scrollbar{display:none}.directory-active-filters button,.directory-active-filters>span{flex:0 0 auto}.directory-active-filters button{min-height:42px;font-size:14px}}@media (max-width:430px){.directory-book{grid-template-columns:96px minmax(0,1fr);gap:12px}.directory-cover{width:96px}.directory-book h2{font-size:18px;line-height:1.28}.directory-book p{font-size:14px}}.header-feedback-compact{display:none;min-height:42px;align-items:center;justify-content:center;padding:9px 12px;border:1px solid #d7e6ee;border-radius:12px;background:#f7fbfd;color:var(--blue-dark);font-size:13px;font-weight:800;white-space:nowrap}.header-feedback-compact:hover{border-color:#a9cfe5;background:var(--blue-soft)}.feedback-page{min-height:100vh;background:#fff}.feedback-hero{border-block:1px solid #edf4f8;background:radial-gradient(circle at 87% 10%,rgba(181,227,244,.28),transparent 25%),linear-gradient(180deg,#f7fbff,#ffffff);padding:56px 0 78px}.feedback-shell{display:grid;grid-template-columns:minmax(0,.78fr) minmax(520px,1.22fr);gap:58px;align-items:start}.feedback-intro{position:sticky;top:30px;padding-top:18px}.feedback-intro h1{max-width:560px;margin:18px 0 20px;font-size:clamp(40px,5vw,62px);line-height:1.02;letter-spacing:-2.5px}.feedback-intro>p{max-width:590px;margin-bottom:24px;color:var(--muted);font-size:18px;line-height:1.65}.feedback-points{display:grid;gap:10px;color:#587186;font-size:15px;line-height:1.45}.feedback-card{border:1px solid #dce8ef;border-radius:24px;background:rgba(255,255,255,.97);box-shadow:0 20px 55px rgba(39,78,110,.1);padding:26px}.feedback-form{display:grid;gap:18px}.feedback-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:14px}.feedback-form label{display:grid;gap:7px}.feedback-form label>span{color:#4f6478;font-size:14px;font-weight:850}.feedback-form label>span small{color:#8797a6;font-size:12px;font-weight:650}.feedback-form input,.feedback-form select,.feedback-form textarea{width:100%;border:1px solid #d4e3ec;border-radius:13px;background:#fbfdff;color:var(--ink);padding:12px 13px;font:inherit;font-size:16px;outline:none;transition:border-color .15s ease,box-shadow .15s ease,background .15s ease}.feedback-form input,.feedback-form select{min-height:48px}.feedback-form textarea{min-height:170px;resize:vertical;line-height:1.55}.feedback-form input:focus,.feedback-form select:focus,.feedback-form textarea:focus{border-color:#84bce0;background:#fff;box-shadow:0 0 0 4px rgba(77,157,224,.1)}.feedback-help{color:#7a8d9d;font-size:12px;line-height:1.45}.feedback-upload{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px;border:1px dashed #bfd5e3;border-radius:16px;background:#f8fbfd}.feedback-upload strong{display:block;margin-bottom:4px;color:var(--ink);font-size:15px}.feedback-upload p{max-width:470px;margin:0;color:var(--muted);font-size:13px;line-height:1.45}.feedback-upload-button{flex:0 0 auto;cursor:pointer}.feedback-upload-button input{position:absolute;width:1px;height:1px;overflow:hidden;opacity:0;pointer-events:none}.feedback-upload-button span{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:10px 13px;border:1px solid #cbdde8;border-radius:11px;background:#fff;color:var(--blue-dark)!important;font-size:14px!important;font-weight:850!important;white-space:nowrap}.feedback-file{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;margin-top:-7px;padding:10px 12px;border-radius:11px;background:#eef8f4;color:#327461;font-size:13px;font-weight:750}.feedback-file img{width:72px;height:54px;display:block;object-fit:cover;border:1px solid #d3e7dc;border-radius:8px;background:#fff}.feedback-file span{min-width:0;overflow-wrap:anywhere}.feedback-file button{border:0;background:transparent;color:#4d6f65;font:inherit;font-weight:800;cursor:pointer}.feedback-alert{display:flex;flex-direction:column;gap:3px;padding:13px 14px;border-radius:13px;font-size:14px;line-height:1.45}.feedback-alert.is-error{border:1px solid #f0c8c8;background:#fff6f6;color:#9d4545}.feedback-alert.is-success{border:1px solid #c9e4d9;background:#f0faf6;color:#2d705c}.feedback-submit-row{display:flex;align-items:center;gap:16px;padding-top:2px}.feedback-submit-row .primary-button{border:0;cursor:pointer;font:inherit}.feedback-submit-row .primary-button:disabled{opacity:.62;cursor:wait}.feedback-submit-row small{color:#7a8b99;font-size:12px;line-height:1.4}.feedback-honeypot{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;opacity:0!important}@media (max-width:980px){.header-feedback-compact{display:inline-flex}.feedback-shell{grid-template-columns:1fr;gap:28px}.feedback-intro{position:static;padding-top:0}.feedback-intro h1{max-width:720px}}@media (max-width:680px){.header-feedback-compact{width:44px;padding-inline:0;font-size:0}.header-feedback-compact:before{content:"✉";font-size:18px}.feedback-hero{padding:34px 0 58px}.feedback-shell{width:min(100% - 24px,1180px)}.feedback-intro h1{margin-top:15px;font-size:clamp(36px,11vw,48px);letter-spacing:-1.8px}.feedback-intro>p{font-size:16px}.feedback-card{padding:16px;border-radius:19px}.feedback-grid{grid-template-columns:1fr}.feedback-upload{align-items:stretch;flex-direction:column}.feedback-upload-button span{width:100%}.feedback-submit-row{align-items:stretch;flex-direction:column}.feedback-submit-row .primary-button{width:100%}}@media (max-width:520px){.feedback-file{grid-template-columns:auto minmax(0,1fr);align-items:start}.feedback-file button{grid-column:2;justify-self:start}}.account-shell{width:min(1120px,calc(100% - 32px));margin:0 auto}.account-hero{padding:44px 0 28px}.account-hero h1{margin:8px 0 10px;color:var(--ink);font-size:clamp(34px,5vw,58px);line-height:1}.account-hero p{max-width:720px;margin:0;color:var(--muted);font-size:15px;line-height:1.65}.account-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:18px;align-items:start;padding:14px 0 72px}.account-benefits,.account-card,.account-profile-card{border:1px solid #dce8ef;border-radius:20px;background:#fff;box-shadow:0 14px 36px rgba(44,78,105,.06)}.account-card,.account-profile-card{padding:22px}.account-benefits h2,.account-card h2,.account-profile-card h2{margin:5px 0 8px;color:var(--ink)}.account-benefits>p,.account-card>p,.account-profile-card>p{margin:0;color:var(--muted);font-size:12px;line-height:1.6}.account-form{display:grid;gap:14px;margin-top:20px}.account-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.account-form label{display:grid;gap:6px;color:var(--ink);font-size:12px;font-weight:850}.account-form label small{color:var(--muted);font-size:10px;font-weight:650}.account-form input,.account-form select{width:100%;min-height:46px;padding:10px 12px;border:1px solid #d6e4ec;border-radius:11px;outline:none;background:#fff;color:var(--ink);font:inherit;font-size:13px}.account-form input:focus,.account-form select:focus{border-color:#9bc8e1;box-shadow:0 0 0 3px rgba(77,157,224,.1)}.account-form .primary-button{border:0;cursor:pointer}.account-form .primary-button:disabled{opacity:.6;cursor:wait}.account-error,.account-success{margin:0;padding:10px 12px;border-radius:11px;font-size:11px;line-height:1.5}.account-error{background:#fff2f1;color:#9a4138}.account-success{background:#edf8f4;color:#337b68}.account-consent{display:flex!important;grid-template-columns:none!important;align-items:flex-start;gap:9px!important;color:var(--muted)!important;font-size:11px!important;font-weight:650!important;line-height:1.55}.account-consent input{width:18px;min-height:18px;height:18px;margin-top:1px;padding:0}.account-consent a,.account-inline-link,.account-meta a{color:var(--blue-dark);font-weight:850}.account-benefits{padding:20px;background:linear-gradient(180deg,#f9fcfe,#fff)}.account-benefits ul{display:grid;gap:10px;margin:18px 0 0;padding:0;list-style:none}.account-benefits li{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;align-items:start}.account-benefits li>span{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:#eaf5fb;color:var(--blue-dark);font-size:12px;font-weight:950}.account-benefits small,.account-benefits strong{display:block}.account-benefits strong{color:var(--ink);font-size:12px}.account-benefits small{margin-top:2px;color:var(--muted);font-size:10px;line-height:1.5}.account-meta{display:flex;flex-wrap:wrap;gap:8px 14px;margin-top:16px;color:var(--muted);font-size:10px}.account-welcome{position:relative;margin-top:8px;padding:22px;border:1px solid #cfe3ee;border-radius:20px;background:linear-gradient(135deg,#f4fbff,#fffdf3);box-shadow:0 14px 36px rgba(44,78,105,.055)}.account-welcome h2{margin:5px 0 7px;color:var(--ink);font-size:clamp(24px,4vw,34px)}.account-welcome>p{max-width:720px;margin:0;color:var(--muted);font-size:12px;line-height:1.6}.account-welcome-close{position:absolute;top:12px;right:12px;width:34px;height:34px;border:1px solid #d7e5ed;border-radius:10px;background:rgba(255,255,255,.86);color:var(--muted);font-size:20px;line-height:1;cursor:pointer}.account-welcome-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:16px}.account-welcome-steps a{min-width:0;padding:14px;border:1px solid #d9e7ee;border-radius:14px;background:rgba(255,255,255,.88);text-decoration:none}.account-welcome-steps span,.account-welcome-steps strong{display:block}.account-welcome-steps strong{color:var(--blue-dark);font-size:12px}.account-welcome-steps span{margin-top:4px;color:var(--muted);font-size:10px;line-height:1.45}.account-welcome-steps a:hover{border-color:#afd1e2;background:#fff}.account-profile-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:16px;padding:18px 0 72px;align-items:start}.account-sync-card{padding:18px;border:1px solid #dce8ef;border-radius:18px;background:#f8fbfd}.account-sync-card h3{margin:4px 0 7px;color:var(--ink)}.account-sync-card p{margin:0 0 13px;color:var(--muted);font-size:11px;line-height:1.55}.account-sync-status{display:inline-flex;margin-bottom:12px;padding:6px 9px;border-radius:999px;background:#eaf6fb;color:var(--blue-dark);font-size:10px;font-weight:850}.account-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.account-actions a,.account-actions button{min-height:40px;padding:8px 12px;border:1px solid #d4e3eb;border-radius:10px;font:inherit;cursor:pointer}.account-actions a,.account-actions button,.header-account-link{display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--ink);font-size:11px;font-weight:850}.header-account-link{min-height:34px;padding:7px 10px;border:1px solid #d7e5ed;border-radius:10px}.header-account-placeholder{width:54px;height:34px}@media (max-width:860px){.account-layout,.account-profile-grid,.account-welcome-steps{grid-template-columns:1fr}}@media (max-width:560px){.account-shell{width:min(100% - 22px,1120px)}.account-hero{padding-top:28px}.account-form-grid{grid-template-columns:1fr}.account-benefits,.account-card,.account-profile-card{padding:16px;border-radius:16px}.account-welcome{padding:18px;border-radius:16px}}