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span{margin-left:3px}.lookup-fab{z-index:31;right:18px;bottom:max(22px,env(safe-area-inset-bottom));min-width:64px;min-height:46px;color:var(--ink);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#fffdf8e6;border:1px solid #17201f2e;border-radius:99px;grid-template-columns:auto auto;align-items:center;gap:5px;padding:7px 13px;display:grid;position:absolute;box-shadow:0 9px 28px #2822192e}.lookup-fab strong{color:var(--red);font:700 16px var(--serif)}.lookup-fab span{font-size:11px}.annotation-toolbar{z-index:28;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#fffdf8f0;border:1px solid #17201f29;border-radius:12px;gap:9px;width:min(430px,100% - 28px);padding:10px;display:grid;position:absolute;top:70px;right:14px;box-shadow:0 12px 38px #2822192e}.annotation-toolbar button{background:0 0;border:0;border-radius:4px;padding:7px 10px;font-size:11px}.annotation-toolbar button:disabled{opacity:.35}.ink-tool-row,.ink-popover-actions{flex-wrap:wrap;gap:4px;display:flex}.ink-popover-actions{border-top:1px solid var(--line);justify-content:flex-end;padding-top:8px}.ink-popover-actions .finish-writing{background:var(--ink);color:#fff}.ink-options{flex-wrap:wrap;align-items:center;gap:7px;display:flex}.ink-color-swatches{align-items:center;gap:4px;display:flex}.annotation-toolbar .ink-color-swatches>button{background:var(--swatch);border:2px solid #ffffffe6;border-radius:50%;width:23px;height:23px;padding:0;box-shadow:0 0 0 1px #17201f33}.annotation-toolbar .ink-color-swatches>button.selected{box-shadow:0 0 0 2px var(--ink);transform:scale(.9)}.ink-custom-color{background:conic-gradient(#e5484d,#f0c000,#45a557,#388cff,#8e55c7,#e5484d);border:1px solid #17201f47;border-radius:50%;width:25px;height:25px;position:relative;overflow:hidden}.ink-custom-color input{opacity:0;cursor:pointer;width:42px;height:42px;position:absolute;inset:-8px}.ink-width-control{border-left:1px solid var(--line);grid-template-columns:auto minmax(72px,1fr) 24px;align-items:center;gap:6px;min-width:142px;padding:0 7px;font-size:10px;display:grid}.ink-width-control input{min-width:0;accent-color:var(--red)}.ink-width-control output{color:var(--red-dark);font-variant-numeric:tabular-nums;text-align:right}.pdf-text-status{z-index:23;color:#755e24;background:#fff4cfe6;border-radius:99px;align-items:center;gap:7px;width:max-content;max-width:calc(100% - 28px);margin:0;padding:5px 6px 5px 10px;font-size:11px;display:flex;position:absolute;top:72px;left:50%;transform:translate(-50%);box-shadow:0 4px 14px #00000014}.pdf-text-status button{width:22px;height:22px;color:inherit;font:16px/1 var(--sans);background:#755e241f;border:0;border-radius:50%}.pdf-text-status .pdf-text-ocr{color:#fffdf8;width:auto;min-height:26px;font:11px/1 var(--sans);background:#755e24;border-radius:99px;padding:4px 9px}.pdf-pages{justify-items:center;gap:22px;width:100%;min-width:0;padding:76px 16px 100px;display:grid}.pdf-reader[data-view-mode=paged] .pdf-pages{height:100%;min-height:0;padding:16px;position:relative}.pdf-reader[data-view-mode=paged] .pdf-page{opacity:0;visibility:hidden;pointer-events:none;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.pdf-reader[data-view-mode=paged] .pdf-page.is-active{opacity:1;visibility:visible;pointer-events:auto}.pdf-page{background:#fff;flex:none;position:relative;overflow:hidden;box-shadow:0 5px 22px #00000029}.pdf-page canvas,.pdf-page .textLayer,.highlight-layer,.ink-layer{width:100%;height:100%;position:absolute;inset:0}.pdf-page .textLayer{z-index:2;opacity:1;transform-origin:0 0;-moz-text-size-adjust:none;text-size-adjust:none;line-height:1;overflow:hidden}.pdf-page .textLayer span,.pdf-page .textLayer br{color:#0000;white-space:pre;transform-origin:0 0;cursor:text;position:absolute}.pdf-reader:not(.is-writing) .textLayer,.pdf-reader:not(.is-writing) .textLayer span{pointer-events:auto;-webkit-user-select:text;user-select:text}.highlight-layer{pointer-events:none;mix-blend-mode:multiply}.highlight-layer span{border-radius:2px;position:absolute}.ink-layer{z-index:5;pointer-events:none;overflow:visible}.ink-layer:not(.tool-select){pointer-events:auto}.ink-layer.tool-pen,.ink-layer.tool-pencil,.ink-layer.tool-marker,.ink-layer.tool-highlighter,.ink-layer.tool-eraser{cursor:crosshair}.pdf-reader[data-view-mode=paged] .ink-layer:not(.tool-select),.epub-reader[data-flow=paginated] .ink-layer:not(.tool-select){touch-action:pan-x}.pdf-reader[data-view-mode=continuous] .ink-layer:not(.tool-select),.epub-reader[data-flow=scrolled] .ink-layer:not(.tool-select){touch-action:pan-y}.ink-layer path{vector-effect:non-scaling-stroke}.ocr-crop-overlay{z-index:12;cursor:crosshair;touch-action:none;position:absolute;inset:0;overflow:hidden}.ocr-crop-shade{pointer-events:none;position:absolute;inset:0}.ocr-crop-rect{z-index:2;outline:2px solid var(--red);pointer-events:none;background:#ffffff14;border:2px solid #fff;position:absolute;box-shadow:0 0 0 9999px #17201f7a}.ocr-crop-actions{z-index:3;color:#fff;cursor:default;background:#17201fdb;border:1px solid #ffffff61;border-radius:10px;align-items:center;gap:7px;width:max-content;max-width:calc(100% - 24px);padding:7px;display:flex;position:absolute;bottom:16px;left:50%;transform:translate(-50%);box-shadow:0 8px 28px #00000042}.ocr-crop-actions span{max-width:270px;padding:0 6px;font-size:11px}.ocr-crop-actions button{color:#fff;background:0 0;border:1px solid #ffffff47;border-radius:5px;min-height:36px;padding:7px 11px;font-size:11px}.ocr-crop-actions .primary-button{border-color:var(--red);background:var(--red)}.ocr-crop-actions button:disabled{opacity:.4}.pdf-page-loading,.pdf-page-error{z-index:7;color:var(--muted);background:#ffffffe6;border:0;place-items:center;font-size:12px;display:grid;position:absolute;inset:0}.pdf-page-number{z-index:4;color:#888;font:10px var(--sans);position:absolute;bottom:7px;right:9px}.page-turn{z-index:21;width:42px;height:64px;color:var(--ink);font:42px/1 var(--serif);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffdf8c2;border:1px solid #17201f1f;border-radius:10px;position:fixed;top:50%;box-shadow:0 6px 18px #0000001a}.page-turn:disabled{opacity:.16}.page-turn-prev{left:246px}.page-turn-next{right:16px}.reader-stage.is-immersive .page-turn-prev{left:16px}.reader-notice{text-align:center;place-content:center;justify-items:center;gap:10px;height:100%;padding:30px;display:grid}.reader-notice strong{font:27px var(--serif)}.reader-notice p{max-width:480px;color:var(--muted)}.epub-reader,.epub-view-host,.epub-view-host>foliate-view{width:100%;height:100%;display:block}.epub-reader{background:#f8f4eb;padding-top:1px;position:relative}.epub-reader.is-writing{touch-action:none;-webkit-user-select:none;user-select:none;overflow:hidden}.epub-reader.is-writing .epub-view-host{pointer-events:none}.epub-reader>.ink-layer{z-index:20}.epub-reader.is-writing>.ink-layer:not(.tool-select){touch-action:none}.epub-ink-tip{color:var(--muted);font-size:10px;line-height:1.45}.epub-controls{opacity:.82;transition:opacity .2s}.epub-controls:hover,.epub-controls:focus-within{opacity:1}.explanation-panel{z-index:50;width:min(390px,38vw);height:100%;padding:22px 24px max(24px,env(safe-area-inset-bottom));border-left:1px solid var(--ink);background:#fffdf8;animation:.23s ease-out panel-in;position:absolute;top:0;right:0;overflow-y:auto;box-shadow:-18px 0 50px #1e181024}@keyframes panel-in{0%{opacity:0;transform:translate(20px)}}.panel-handle{display:none}.panel-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding-bottom:12px;display:flex}.panel-head p{color:var(--muted);margin:0;font-size:11px}.panel-head button{background:0 0;border:0;font-size:28px}.ai-loading,.ai-error{text-align:center;place-content:center;justify-items:center;gap:10px;min-height:330px;display:grid}.ai-loading strong,.ai-error strong{font:26px var(--serif)}.ai-loading p,.ai-error p{color:var(--muted);font-size:13px;line-height:1.6}.ai-error div{gap:8px;display:flex}.ai-error button{border:1px solid var(--ink);background:0 0;padding:8px 12px}.term-row{justify-content:space-between;gap:14px;padding:26px 0 20px;display:flex}.term-row span{color:var(--red);letter-spacing:.15em;text-transform:uppercase;font-size:9px;font-weight:800}.term-row h2{font:600 39px/.95 var(--serif);overflow-wrap:anywhere;margin:3px 0}.term-row p{color:#4d5650;font:20px var(--serif);margin:8px 0 0}.star-button{border:1px solid var(--ink);background:var(--gold);border-radius:50%;flex:none;width:50px;height:50px;font-size:28px}.selection-hint{color:#66552b;background:#fff0ca;margin:0 0 20px;padding:9px 10px;font-size:12px}.explanation-content section{margin:18px 0}.detail-label{color:var(--red);letter-spacing:.12em;font-size:10px;font-weight:800}.explanation-content section p{margin:6px 0;line-height:1.72}.tag-row{flex-wrap:wrap;gap:6px;margin:18px 0;font-size:11px;display:flex}.explanation-content blockquote{border-left:2px solid var(--gold);background:var(--paper);color:#5d645f;font:italic 13px/1.6 var(--serif);margin:20px 0;padding:14px 16px}.save-concept{background:var(--red);color:#fff;border:0;width:100%;padding:14px;font-weight:800}.toast{z-index:100;left:50%;bottom:max(24px,env(safe-area-inset-bottom));background:var(--ink);color:#fff;border:0;border-radius:5px;max-width:min(560px,90vw);padding:12px 18px;position:fixed;transform:translate(-50%);box-shadow:0 10px 35px #00000038}.lookup-dialog-backdrop{z-index:110;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#17201f85;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.lookup-dialog{border:1px solid var(--ink);background:#fffdf8;width:min(560px,100%);padding:34px;position:relative;box-shadow:0 24px 80px #00000047}.lookup-dialog h2{font:600 clamp(30px,5vw,45px)/1 var(--serif);margin:8px 0 13px}.lookup-dialog>p:not(.eyebrow){color:#4d5650;line-height:1.65}.lookup-dialog textarea{resize:vertical;border:1px solid var(--line);width:100%;font:18px/1.55 var(--serif);background:#fff;border-radius:4px;padding:14px}.lookup-dialog-actions{justify-content:flex-end;gap:8px;margin-top:16px;display:flex}.lookup-dialog-actions button{border:1px solid var(--ink);background:0 0;min-height:42px;padding:9px 16px}.lookup-dialog-actions .primary-button{background:var(--ink);color:#fff}.lookup-dialog>small{color:var(--muted);margin-top:15px;line-height:1.5;display:block}.format-dialog-backdrop{z-index:110;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#17201f85;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.format-dialog{border:1px solid var(--ink);background:#fffdf8;width:min(520px,100%);padding:34px;position:relative;box-shadow:0 24px 80px #00000047}.format-dialog h2{font:600 clamp(30px,5vw,45px)/1 var(--serif);margin:8px 0 16px}.format-dialog>p:not(.eyebrow){color:#4d5650;margin:0;line-height:1.72}.format-dialog>small{color:var(--muted);margin-top:14px;line-height:1.55;display:block}.format-dialog-close{width:36px;height:36px;font:28px/1 var(--sans);background:0 0;border:0;position:absolute;top:12px;right:12px}.format-dialog-actions{flex-wrap:wrap;gap:9px;margin-top:28px;display:flex}.format-dialog-actions button{border:1px solid var(--ink);background:0 0;min-height:44px;padding:10px 16px}.format-dialog-actions .primary-button{background:var(--ink);color:#fff}@media (max-width:980px){.lock-screen{background:var(--paper);grid-template-columns:1fr}.lock-copy{align-self:end}.lock-copy h1{font-size:clamp(48px,9vw,80px)}.lock-card{max-width:560px}.document-grid{grid-template-columns:repeat(3,1fr)}.reader-stage{grid-template-columns:180px minmax(0,1fr)}.topbar-note{display:none}.topbar{grid-template-columns:1fr auto}.reading-title{display:none}}@media (orientation:portrait),(max-width:760px){.library-hero{grid-template-columns:1fr}.import-card{max-width:450px}.document-grid{grid-template-columns:repeat(2,1fr)}.concept-toolbar{grid-template-columns:1fr 1fr}.concept-toolbar input{grid-column:1/-1}.concept-card{grid-template-columns:38px 1fr}.concept-actions{grid-area:2/2;justify-content:flex-start;display:flex}.reader-stage{display:block}.reader-rail{z-index:24;background:#f2eee4eb;border:0;border-radius:6px;width:auto;height:auto;padding:8px;position:absolute;top:12px;left:12px}.reader-rail>:not(.reader-rail-actions){display:none}.reader-surface{height:100%}.page-turn-prev{left:14px}.page-turn-next{right:14px}.reader-floatbar{scrollbar-width:none;overflow-x:auto}.reader-floatbar::-webkit-scrollbar{display:none}.explanation-panel{border:0;border-top:1px solid var(--ink);border-radius:20px 20px 0 0;width:100%;height:min(62dvh,600px);animation-name:drawer-in;position:absolute;inset:auto 0 0}@keyframes drawer-in{0%{opacity:0;transform:translateY(30px)}}.panel-handle{background:#b5b0a8;border-radius:99px;width:42px;height:4px;margin:-10px auto 12px;display:block}}@media (max-width:560px){.topbar{height:66px;padding-inline:15px}.topbar nav button{padding:8px 9px;font-size:12px}.library-page,.concept-page{padding:32px 18px 80px}.library-hero{padding:20px 0 55px}.library-hero h1,.concept-intro h1{font-size:52px}.document-grid{gap:24px 12px}.document-cover{padding:12px}.document-cover strong{font-size:19px}.section-heading>p{display:none}.concept-toolbar{top:66px}.concept-card{grid-template-columns:1fr}.concept-number{display:none}.concept-actions{grid-column:1}.lock-screen{gap:35px;padding:30px 22px}.lock-copy>p:last-child{font-size:16px}.lock-card{padding:24px}.annotation-toolbar button{padding-inline:7px}.annotation-toolbar{width:calc(100% - 20px);top:68px;right:10px}.ink-fab{top:10px;right:10px}.ink-width-control{grid-template-columns:minmax(68px,1fr) 22px;min-width:118px}.ink-width-control span{display:none}.page-turn{width:34px;height:54px;font-size:34px}.format-dialog-backdrop{align-items:end;padding:14px}.format-dialog{padding:30px 22px max(24px,env(safe-area-inset-bottom));border-radius:18px 18px 0 0}.format-dialog-actions{display:grid}.lookup-dialog-backdrop{align-items:end;padding:14px}.lookup-dialog{padding:30px 22px max(24px,env(safe-area-inset-bottom));border-radius:18px 18px 0 0}.ocr-crop-actions{flex-wrap:wrap;justify-content:flex-end;width:calc(100% - 18px);bottom:10px}.ocr-crop-actions span{width:100%;max-width:none}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}