._lesson_e3dv2_1{--ink:var(--foreground);--muted:var(--muted-foreground);--line:var(--border);--surface:var(--card);color:var(--ink);max-width:1180px;padding-top:34px;padding-bottom:80px}._hero_e3dv2_1{max-width:900px;margin-bottom:36px}._hero_e3dv2_1>a{color:var(--muted);font-size:14px}._hero_e3dv2_1 h1{margin:24px 0;font-size:clamp(30px,4vw,48px);line-height:1.2}._lesson_e3dv2_1 p{max-width:900px;color:var(--ink);margin:16px 0;font-size:17px;line-height:1.95}._contents_e3dv2_1{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:repeat(3,1fr);gap:0;display:grid}._contents_e3dv2_1 a{gap:12px;padding:16px 14px;font-size:14px;display:flex}._contents_e3dv2_1 span{font-variant-numeric:tabular-nums;color:var(--muted)}._section_e3dv2_1{padding-top:58px;scroll-margin-top:90px}._heading_e3dv2_1{border-bottom:1px solid var(--line);align-items:baseline;gap:18px;margin-bottom:22px;padding-bottom:18px;display:flex}._heading_e3dv2_1>span{color:var(--muted);font-size:14px}._heading_e3dv2_1 h2{font-size:clamp(23px,2.5vw,30px);line-height:1.4}._section_e3dv2_1 h3{margin:10px 0;font-size:19px;line-height:1.5}._panel_e3dv2_1{border:1px solid var(--line);background:var(--surface);border-radius:16px;margin:24px 0;padding:22px}._panel_e3dv2_1 p{margin:12px 0;font-size:16px}._controls_e3dv2_1{flex-wrap:wrap;align-items:center;gap:9px;margin:14px 0;display:flex}._controls_e3dv2_1 button,._partButtons_e3dv2_1 button{border:1px solid var(--line);background:var(--surface);min-height:42px;color:var(--ink);font:inherit;cursor:pointer;border-radius:8px;padding:9px 13px;font-size:14px}._controls_e3dv2_1 button:hover,._partButtons_e3dv2_1 button:hover{border-color:#519d91}._controls_e3dv2_1 button[aria-pressed=true],._partButtons_e3dv2_1 button[aria-pressed=true],._controls_e3dv2_1 ._primary_e3dv2_1{color:#fff;background:#1b675d;border-color:#1b675d}._controls_e3dv2_1 button:disabled{opacity:.42;cursor:default}._controls_e3dv2_1 output{font-variant-numeric:tabular-nums;color:var(--muted);font-size:14px}._controls_e3dv2_1 label{flex-wrap:wrap;align-items:center;gap:10px;font-size:15px;display:flex}._controls_e3dv2_1 select,._controls_e3dv2_1 input[type=number]{background:var(--surface);border:1px solid var(--line);max-width:100%;min-height:42px;color:var(--ink);border-radius:7px;padding:6px 10px}._controls_e3dv2_1 input[type=range]{accent-color:#2b8d7f;width:180px}._viewerShell_e3dv2_1{background:var(--surface);border:1px solid var(--line);border-radius:16px;position:relative;overflow:hidden}._viewer_e3dv2_1{background:radial-gradient(#7f9aaa29,#32414e05);width:100%;height:430px}._viewer_e3dv2_1 canvas{width:100%;height:100%;display:block}._viewerShell_e3dv2_1>._controls_e3dv2_1{padding:0 16px}._loading_e3dv2_1{text-align:center;pointer-events:none;position:absolute;top:35%;left:20px;right:20px}._partButtons_e3dv2_1{flex-wrap:wrap;gap:8px;margin:18px 0;display:flex}._split_e3dv2_1{grid-template-columns:minmax(0,1.45fr) minmax(250px,.8fr);align-items:start;gap:22px;display:grid}._partText_e3dv2_1{border-left:3px solid #359787;min-height:135px;padding:0 18px}._hint_e3dv2_1{color:var(--muted)!important;font-size:14px!important}._network_e3dv2_1{grid-template-columns:repeat(var(--device-count,3),minmax(0,1fr));align-items:stretch;gap:10px;padding:14px 0;display:grid}._device_e3dv2_1{border:1px solid var(--line);background:var(--surface);text-align:center;border-radius:10px;min-width:0;padding:16px 9px;position:relative}._device_e3dv2_1[data-active=true]{outline-offset:2px;outline:3px solid #329d8b}._device_e3dv2_1 strong{font-size:14px;display:block}._device_e3dv2_1 small{color:var(--muted);overflow-wrap:anywhere;margin-top:8px;font-size:12px;display:block}._device_e3dv2_1:not(:last-child):after{content:"→";color:var(--muted);z-index:1;position:absolute;top:12px;right:-13px}._frame_e3dv2_1{border:2px solid #2a8f80;border-radius:12px;margin:20px 0;padding:14px}._frameTitle_e3dv2_1{letter-spacing:.04em;color:var(--muted);margin-bottom:10px;font-size:13px;font-weight:600}._frameFields_e3dv2_1{grid-template-columns:1fr 1fr;gap:12px;display:grid}._frameFields_e3dv2_1>div{min-width:0}._frameFields_e3dv2_1 span{color:var(--muted);font-size:13px;display:block}._frame_e3dv2_1 code{overflow-wrap:anywhere;font-size:clamp(11px,1.5vw,15px)}._packet_e3dv2_1{background:color-mix(in srgb,#3f79c7 13%,var(--surface));border:1px solid #5f85b4;border-radius:8px;margin-top:12px;padding:12px}._packet_e3dv2_1 strong{font-size:14px}._caption_e3dv2_1{min-height:145px}._macRow_e3dv2_1{flex-wrap:wrap;gap:8px;display:flex}._macRow_e3dv2_1 button{border:1px solid var(--line);background:var(--surface);min-height:48px;color:var(--ink);border-radius:8px;padding:12px 16px;font-family:ui-monospace,monospace;font-size:21px}._macRow_e3dv2_1 button[aria-pressed=true]{background:color-mix(in srgb,#329d8b 12%,var(--surface));border:2px solid #329d8b}._bits_e3dv2_1{grid-template-columns:repeat(8,minmax(0,1fr));gap:7px;max-width:600px;margin:18px 0;display:grid}._bits_e3dv2_1 button{background:var(--surface);color:var(--ink);cursor:pointer;text-align:center;border:1px solid var(--line);border-radius:8px;min-height:52px;padding:10px 4px;font-family:ui-monospace,monospace}._bits_e3dv2_1 strong{font-size:21px;display:block}._bits_e3dv2_1 small{color:var(--muted);font-size:12px}._pixelGrid_e3dv2_1{grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;max-width:440px;display:grid}._pixel_e3dv2_1{aspect-ratio:1.2;font-variant-numeric:tabular-nums;border:2px solid #0000;border-radius:5px;justify-content:center;align-items:center;font-size:16px;display:flex;position:relative}._pixel_e3dv2_1[data-active=true]{border:3px solid #da991b;box-shadow:0 0 0 2px #da991b}._pixel_e3dv2_1 small{font-size:10px;position:absolute;top:3px;left:6px}._legend_e3dv2_1{color:var(--muted);flex-wrap:wrap;gap:15px;margin:14px 0;font-size:13px;display:flex}._legend_e3dv2_1 i{background:var(--dot);border-radius:2px;width:10px;height:10px;margin-right:6px;display:inline-block}._laneRows_e3dv2_1{gap:8px;display:grid}._lane_e3dv2_1{border:1px solid var(--line);border-radius:8px;align-items:center;gap:12px;min-height:46px;padding:10px;font-size:14px;display:flex}._lane_e3dv2_1[data-active=true]{background:color-mix(in srgb,#329d8b 14%,var(--surface));border-color:#329d8b}._lane_e3dv2_1>span{color:var(--muted);min-width:70px}._lane_e3dv2_1 strong{font-variant-numeric:tabular-nums}._tableScroll_e3dv2_1{overflow:auto}._table_e3dv2_1{border-collapse:collapse;width:100%;min-width:450px;font-size:14px}._table_e3dv2_1 th,._table_e3dv2_1 td{text-align:left;border-bottom:1px solid var(--line);padding:11px;line-height:1.6}._table_e3dv2_1 th{color:var(--muted);font-weight:500}._barRow_e3dv2_1{grid-template-columns:90px 1fr;align-items:center;gap:12px;margin:15px 0;font-size:14px;display:grid}._bar_e3dv2_1{background:color-mix(in srgb,var(--muted) 12%,var(--surface));border-radius:6px;min-width:0;min-height:34px;display:flex;overflow:hidden}._bar_e3dv2_1 span{color:#fff;justify-content:center;align-items:center;min-width:0;font-size:12px;display:flex}._answer_e3dv2_1{border-top:1px solid var(--line);padding:16px 0}._answer_e3dv2_1 details{border-left:2px solid #3d998a;padding-left:18px}._answer_e3dv2_1 summary{cursor:pointer;color:var(--muted);font-size:15px}._answer_e3dv2_1 details p{font-size:16px}._sources_e3dv2_1{padding-left:20px;font-size:14px;line-height:1.9}._sources_e3dv2_1 a{text-underline-offset:3px;text-decoration:underline}._architecture_e3dv2_1{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0;display:grid}._architecture_e3dv2_1>div{border:1px solid var(--line);border-radius:10px;min-width:0;padding:17px}._architecture_e3dv2_1 strong{font-size:16px}._architecture_e3dv2_1 p{font-size:14px}._architecture_e3dv2_1 i{background:#3d998a;height:5px;margin-bottom:15px;display:block}._miniCells_e3dv2_1{grid-template-columns:repeat(4,1fr);gap:5px;margin-top:12px;display:grid}._miniCells_e3dv2_1 span{background:color-mix(in srgb,#3d998a 40%,var(--surface));border:1px solid #3d998a;border-radius:3px;height:21px}._focusNote_e3dv2_1{background:color-mix(in srgb,#d9a54c 8%,var(--surface));border-left:3px solid #d9a54c;padding:12px 16px}._stepHistory_e3dv2_1{flex-wrap:wrap;gap:6px;font-size:13px;display:flex}._stepHistory_e3dv2_1 span{border:1px solid var(--line);border-radius:5px;padding:5px 9px}._stepHistory_e3dv2_1 span[data-done=true]{background:color-mix(in srgb,#329d8b 13%,var(--surface))}@media (max-width:800px){._contents_e3dv2_1{grid-template-columns:repeat(2,1fr)}._split_e3dv2_1{grid-template-columns:1fr}._viewer_e3dv2_1{height:370px}._architecture_e3dv2_1{grid-template-columns:1fr}._architecture_e3dv2_1>div{display:block}._network_e3dv2_1{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}._device_e3dv2_1:after{display:none}._caption_e3dv2_1{min-height:0}._lesson_e3dv2_1 p{font-size:16px}._section_e3dv2_1{padding-top:40px}}@media (max-width:480px){._lesson_e3dv2_1{padding-left:16px;padding-right:16px}._viewer_e3dv2_1{height:300px}._panel_e3dv2_1{padding:15px}._contents_e3dv2_1 a{padding:12px 8px;font-size:13px}._frameFields_e3dv2_1{grid-template-columns:1fr}._network_e3dv2_1{grid-template-columns:1fr 1fr}._bits_e3dv2_1{gap:3px}._bits_e3dv2_1 small{font-size:10px}._macRow_e3dv2_1 button{padding:9px 11px;font-size:18px}._controls_e3dv2_1 button{font-size:13px}._hero_e3dv2_1 h1{font-size:31px}._pixel_e3dv2_1{font-size:14px}._barRow_e3dv2_1{grid-template-columns:60px 1fr}._table_e3dv2_1{min-width:400px}}._raster_e3dv2_3{width:min(100%,360px);margin:20px auto;position:relative}._rasterGrid_e3dv2_3{border:1px solid var(--line);grid-template-columns:repeat(6,1fr);display:grid}._rasterGrid_e3dv2_3>button{cursor:pointer;color:inherit;aspect-ratio:1;border:1px solid var(--line);background:color-mix(in srgb,var(--muted) 6%,var(--surface));justify-content:center;align-items:center;padding:0;display:flex}._rasterGrid_e3dv2_3>button[data-filled=true]{background:#3c78b7}._rasterGrid_e3dv2_3 i{background:var(--muted);border-radius:50%;width:9px;height:9px;display:block}._rasterGrid_e3dv2_3 i[data-covered=true]{background:#4ec6ad;outline:3px solid #4ec6ad44}._raster_e3dv2_3 svg{pointer-events:none;width:100%;height:100%;position:absolute;inset:0}._lesson_e3dv2_1 .math-inline{vertical-align:middle;max-width:100%;display:inline-block;overflow-x:auto}._viewer_e3dv2_1{margin:0}._teachingBlock_e3dv2_7{border-top:1px solid var(--line);min-width:0;margin-top:28px;padding:24px 0}._pictureStudy_e3dv2_8{flex-wrap:wrap;align-items:center;gap:24px;min-height:150px;padding:22px 0;display:flex}._pictureStudy_e3dv2_8 figure,._imageComparison_e3dv2_9 figure{min-width:0;margin:0}._pictureStudy_e3dv2_8 figcaption,._imageComparison_e3dv2_9 figcaption{color:var(--muted);margin-top:12px;font-size:14px;line-height:1.6}._tinyPicture_e3dv2_11{border:1px solid var(--line);width:76px}._tinyPicture_e3dv2_11 ._picturePixels_e3dv2_12{gap:0}._tinyPicture_e3dv2_11 ._picturePixels_e3dv2_12>div{aspect-ratio:1;border:0;border-radius:0}._originalPatch_e3dv2_14{flex:0 0 130px}._enlargedPatch_e3dv2_15{width:min(100%,340px)}._pictureArrow_e3dv2_16{color:var(--muted);font-size:26px}._picturePixels_e3dv2_12{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;width:100%;min-width:0;display:grid}._picturePixels_e3dv2_12>button,._picturePixels_e3dv2_12>div{aspect-ratio:1.15;border:1px solid var(--line);background:var(--surface);color:var(--muted);font-variant-numeric:tabular-nums;border-radius:4px;justify-content:center;align-items:center;font-family:inherit;display:flex;position:relative}._picturePixels_e3dv2_12>button{cursor:pointer;min-width:0}._picturePixels_e3dv2_12 strong{font-size:clamp(17px,2.3vw,24px);font-weight:600}._picturePixels_e3dv2_12 small{font-size:11px;line-height:1.2;position:absolute;top:3px;left:6px}._picturePixels_e3dv2_12>button[aria-pressed=true]{outline-offset:1px;z-index:1;outline:3px solid #c88f1e}:is(._picturePixels_e3dv2_12>button:focus-visible,._binaryChoices_e3dv2_23 button:focus-visible,._binaryTable_e3dv2_23 button:focus-visible,._bitRecord_e3dv2_23 button:focus-visible){outline-offset:2px;outline:3px solid #c88f1e}._pixelDone_e3dv2_24{color:#fff;background:#172824;border-radius:50%;place-items:center;width:18px;height:18px;font-size:13px;line-height:1;display:grid;position:absolute;top:3px;right:3px}._greyScale_e3dv2_25{gap:12px;max-width:430px;margin:20px 0;display:flex}._greyScale_e3dv2_25>div{text-align:center;flex:1;min-width:0;font-size:14px}._greyScale_e3dv2_25 span{border:1px solid var(--line);border-radius:3px;height:48px;margin-bottom:7px;display:block}._binaryChoices_e3dv2_23{flex-wrap:wrap;gap:12px;margin:16px 0;display:flex}._binaryChoices_e3dv2_23 button{background:var(--surface);border:1px solid var(--line);min-height:64px;color:var(--ink);cursor:pointer;border-radius:7px;align-items:center;gap:14px;padding:12px 18px;display:flex}._binaryChoices_e3dv2_23 code{font-size:26px}._binaryChoices_e3dv2_23 i,._calculationPath_e3dv2_31 i{border:1px solid var(--line);border-radius:3px;width:34px;height:34px;display:block}._binaryChoices_e3dv2_23 button[aria-pressed=true],._binaryTable_e3dv2_23 button[aria-pressed=true]{background:color-mix(in srgb,#329d8b 8%,var(--surface));border:2px solid #287d6e}._binaryTable_e3dv2_23{max-width:640px;margin:18px 0}._binaryTableHead_e3dv2_34,._binaryTable_e3dv2_23>button{text-align:center;grid-template-columns:1fr 1fr 1.4fr 1.4fr;align-items:center;gap:8px;width:100%;display:grid}._binaryTableHead_e3dv2_34{color:var(--muted);padding:8px;font-size:13px;line-height:1.5}._binaryTable_e3dv2_23>button{border:1px solid var(--line);background:var(--surface);min-height:56px;color:var(--ink);cursor:pointer;font-variant-numeric:tabular-nums;border-radius:4px;margin-top:6px;padding:10px 8px;font-size:19px}._capacitySteps_e3dv2_37{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;max-width:800px;margin:20px 0;padding:0;list-style:none;display:grid}._capacitySteps_e3dv2_37 li{border-top:1px solid var(--line);padding:12px 0}._capacitySteps_e3dv2_37 span{color:var(--muted);font-size:13px;display:block}._capacitySteps_e3dv2_37 strong{font-variant-numeric:tabular-nums;font-size:17px;font-weight:500}._bitRecord_e3dv2_23{grid-template-columns:repeat(8,minmax(0,1fr));gap:6px;max-width:640px;margin:18px 0;padding:4px 2px;display:grid}._bitRecord_e3dv2_23 button{border:1px solid var(--line);background:var(--surface);min-width:0;min-height:66px;color:var(--ink);cursor:pointer;font-variant-numeric:tabular-nums;border-radius:5px}._bitRecord_e3dv2_23 button[aria-pressed=true]{color:#fff;background:#1b675d;border-color:#1b675d}._bitRecord_e3dv2_23 small{margin-bottom:5px;font-size:12px;display:block}._bitRecord_e3dv2_23 strong{font-size:23px;font-weight:500;display:block}._storedValue_e3dv2_46{flex-wrap:wrap;align-items:center;gap:18px;margin:20px 0;display:flex}._storedValue_e3dv2_46>span{border:1px solid var(--line);border-radius:4px;width:72px;height:72px}._storedValue_e3dv2_46>div{min-width:0}._storedValue_e3dv2_46 code{letter-spacing:.07em;font-size:20px}._storedValue_e3dv2_46 p{margin:4px 0}._calculationPath_e3dv2_31{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;max-width:860px;margin:22px 0;display:grid}._calculationPath_e3dv2_31>div{border-top:2px solid var(--line);min-width:0;min-height:128px;padding-top:14px}._calculationPath_e3dv2_31 span{color:var(--muted);font-size:14px;display:block}._calculationPath_e3dv2_31 strong{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin:8px 0;font-size:clamp(17px,2vw,25px);font-weight:500;display:block}._workCounts_e3dv2_55{border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums;flex-wrap:wrap;gap:14px 28px;margin:20px 0;padding:14px 0;font-size:15px;display:flex}._imageComparison_e3dv2_9{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;max-width:860px;margin:24px 0;display:grid}._imageComparison_e3dv2_9 figcaption{margin:0 0 12px}._pixelInspection_e3dv2_58{border-left:3px solid #c88f1e;margin:24px 0;padding:4px 0 4px 18px}._workTable_e3dv2_59{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:14px}._workTable_e3dv2_59 th,._workTable_e3dv2_59 td{text-align:left;border-bottom:1px solid var(--line);padding:12px 10px;line-height:1.6}._workTable_e3dv2_59 th{font-weight:500}._workTable_e3dv2_59 thead{color:var(--muted)}._resultList_e3dv2_63{font-variant-numeric:tabular-nums;flex-wrap:wrap;gap:8px 18px;margin-top:12px;font-size:14px;display:flex}._workHistory_e3dv2_64{border-top:1px solid var(--line);margin-top:24px;padding-top:18px}._workHistory_e3dv2_64 summary{cursor:pointer;font-size:15px;line-height:1.6}._workHistory_e3dv2_64 ._workTable_e3dv2_59{min-width:450px;margin-top:16px}._viewer_e3dv2_1{position:relative}._partMarker_e3dv2_68{z-index:1;opacity:0;color:#171c20;width:34px;height:34px;font:600 14px/1 var(--font-sans,Arial,sans-serif);pointer-events:none;background:#ffe3a3;border:2px solid #272e32;border-radius:50%;place-items:center;display:grid;position:absolute;transform:translate(-50%,-50%);box-shadow:0 0 0 2px #fff}._partMarker_e3dv2_68:after{content:"";background:#272e32;width:2px;height:12px;position:absolute;top:calc(100% + 2px);left:calc(50% - 1px);box-shadow:0 0 0 1px #fff}._selectionCaption_e3dv2_70{border-top:1px solid var(--line);flex-direction:column;gap:5px;padding:13px 16px;font-size:14px;line-height:1.6;display:flex}._selectionCaption_e3dv2_70 span{color:var(--muted)}._partIndex_e3dv2_72{font-variant-numeric:tabular-nums;opacity:.8;margin-right:7px;display:inline-block}@media (max-width:600px){._pictureStudy_e3dv2_8{grid-template-columns:minmax(0,1fr);gap:14px;display:grid}._originalPatch_e3dv2_14{width:130px}._pictureArrow_e3dv2_16{text-align:center;width:30px;margin-left:22px;font-size:22px;transform:rotate(90deg)}._enlargedPatch_e3dv2_15{width:min(100%,320px)}._capacitySteps_e3dv2_37{grid-template-columns:repeat(2,minmax(0,1fr))}._bitRecord_e3dv2_23{gap:4px}._bitRecord_e3dv2_23 small{font-size:11px}._calculationPath_e3dv2_31{grid-template-columns:1fr}._calculationPath_e3dv2_31>div{min-height:90px}._imageComparison_e3dv2_9{grid-template-columns:1fr;gap:22px;max-width:340px}._picturePixels_e3dv2_12 strong{font-size:22px}._picturePixels_e3dv2_12 small{font-size:10px}._panel_e3dv2_1[data-gpu-lab=pixel-work] ._lane_e3dv2_1{flex-direction:column;align-items:flex-start;gap:5px}._workTable_e3dv2_59 th,._workTable_e3dv2_59 td{padding:10px 6px;font-size:13px}._binaryTableHead_e3dv2_34{font-size:12px}._teachingBlock_e3dv2_7{padding-top:20px}}._bits_e3dv2_1 button[aria-pressed=true]{background:color-mix(in srgb,#329d8b 13%,var(--surface));border-color:#329d8b}._rasterGrid_e3dv2_3>button[aria-pressed=true]{outline-offset:-4px;outline:3px solid #c29440}