:root{--paper:#f5f1e7;--desk:#e7e2d7;--ink:#27312e;--muted:#666c62;--rule:#c5c6b9;--orange:#bd4b29;--orange-pale:#f2dfd0;--green:#3d6654;--green-pale:#e2e9dd;--red:#a13a29;--serif:Batang,"바탕",Georgia,serif;--mono:Consolas,"Courier New",monospace}
*{box-sizing:border-box}html{min-height:100%;scroll-behavior:smooth}body{margin:0;background:var(--desk);color:var(--ink);font:15px/1.65 "Malgun Gothic","맑은 고딕",Arial,sans-serif;word-break:keep-all}button,input{font:inherit}button{cursor:pointer;color:inherit}button:disabled{cursor:default}button,a,input{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--orange);outline-offset:5px}a{color:inherit}button{touch-action:manipulation}button:disabled{opacity:.5}::selection{background:#e7b69c;color:var(--ink)}.page-shell{max-width:1440px;margin:auto;padding:0 40px}.masthead{min-height:112px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:17px;text-decoration:none}.brand-mark{width:56px;height:56px;border:2px solid var(--ink);display:grid;place-content:center;position:relative;font:bold 22px var(--mono);letter-spacing:-2px}.brand-mark span{color:var(--orange);margin:0 2px}.brand-name{font-weight:800;font-size:23px;letter-spacing:-1px}.brand-name small{display:block;font:9px/2 var(--mono);letter-spacing:1.8px}.masthead-right{display:flex;align-items:center;gap:30px}.edition{font:11px var(--mono);color:var(--muted);letter-spacing:1px}.text-button{border:0;background:none;padding:8px 0;border-bottom:1px solid var(--ink);font-size:12px}.text-button:hover{color:var(--orange);border-color:var(--orange)}.lab-frame{display:grid;grid-template-columns:260px minmax(0,1fr);background:var(--paper);border:1px solid var(--ink);min-height:735px;box-shadow:5px 5px 0 #d6d1c4}.field-notes{border-right:1px solid var(--ink);padding:26px 23px;display:flex;flex-direction:column;position:relative}.notes-top{display:flex;align-items:center;justify-content:space-between;gap:8px}.eyebrow{font:10px/1.5 var(--mono);letter-spacing:2px;color:var(--muted)}.small-stamp{font-size:10px;border:1px solid var(--ink);padding:2px 7px;transform:rotate(-5deg)}.sidebar-title{font:23px/1.6 var(--serif);margin:28px 0 27px;letter-spacing:-1px}.sidebar-title strong{font-weight:700}.mission-link{display:flex;align-items:center;gap:13px;width:100%;text-align:left;border:0;border-top:1px solid var(--rule);background:none;padding:15px 1px;position:relative}.mission-link:last-child{border-bottom:1px solid var(--rule)}.mission-link .mission-number{font:16px var(--mono);color:var(--muted);min-width:22px}.mission-link .mission-name{font-size:13px;font-weight:700}.mission-link .mission-state{margin-left:auto;font:9px var(--mono);letter-spacing:.3px;color:var(--muted)}.mission-link:disabled{opacity:.48}.mission-link.active{color:var(--orange)}.mission-link.active:before{content:"";position:absolute;width:5px;background:var(--orange);left:-24px;top:14px;bottom:14px}.mission-link.done .mission-state{color:var(--green);font-weight:bold}.mission-link:not(:disabled):hover .mission-name{text-decoration:underline;text-underline-offset:5px}.lab-map{margin:27px 0 15px}.lab-map svg{width:100%;height:auto;display:block}.notebook-bottom{margin-top:auto;padding-top:20px}.notebook-bottom>span{font-size:10px;color:var(--muted)}.notebook-bottom>strong{float:right;font:13px var(--mono)}.progress-track{height:4px;background:#dcdccf;margin:10px 0 15px}.progress-track span{display:block;background:var(--green);height:100%;width:0;transition:width .5s}.notebook-bottom p{font-size:10px;color:var(--muted);line-height:1.8;margin:0}main{min-width:0;padding:39px 48px 32px;position:relative;outline:none!important}.page-footer{display:flex;justify-content:space-between;gap:10px;padding:19px 0 25px;color:var(--muted);font-size:10px;letter-spacing:.5px}.intro{min-height:652px;position:relative;display:flex;flex-direction:column}.intro-kicker{display:flex;align-items:center;gap:12px}.live-dot{width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px #bd4b2912}.intro h1{font:700 clamp(36px,4vw,60px)/1.32 var(--serif);letter-spacing:-3px;margin:32px 0 19px;z-index:1;position:relative}.intro h1 em{font-style:normal;color:var(--orange)}.intro-copy{font-size:14px;line-height:1.9;color:var(--muted);max-width:380px;margin:0;z-index:1}.intro-illustration{position:absolute;width:47%;max-width:390px;right:-9px;top:83px;transform:rotate(2deg)}.intro-illustration svg{display:block;width:100%;height:auto}.intro-instructions{margin-top:auto;padding-top:36px;position:relative;z-index:1}.intro-instructions .intro-label{font:10px var(--mono);letter-spacing:2px;border-bottom:1px solid var(--ink);padding-bottom:11px}.intro-rules{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:17px 0 28px}.intro-rule{display:flex;align-items:flex-start;gap:11px;font-size:11px;line-height:1.8}.intro-rule b{font:18px var(--mono);color:var(--orange)}.intro-rule strong{font-size:12px;display:block}.start-row{display:flex;align-items:center;gap:22px;flex-wrap:wrap}.start-row small{font-size:10px;color:var(--muted)}.primary-button,.secondary-button{min-height:45px;border:1px solid var(--ink);padding:11px 23px;font-size:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:22px;transition:background .15s,color .15s,transform .15s}.primary-button{background:var(--ink);color:var(--paper)}.primary-button:hover:not(:disabled){background:var(--orange);border-color:var(--orange)}.primary-button:active:not(:disabled){transform:translateY(2px)}.primary-button .button-arrow{font-size:20px;font-weight:400;line-height:1}.secondary-button{background:transparent}.secondary-button:hover:not(:disabled){background:#e7e2d7}.mission-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}.mission-header h1{font:700 34px/1.4 var(--serif);letter-spacing:-1.6px;margin:9px 0 0}.device-status{display:flex;align-items:center;gap:8px;font:10px var(--mono);margin-top:5px;color:var(--orange);border:1px solid currentColor;padding:5px 9px;white-space:nowrap}.device-status i{width:5px;height:5px;border-radius:50%;background:currentColor}.device-status.online{color:var(--green)}.mission-description{font-size:13px;line-height:1.9;max-width:630px;color:var(--muted);margin:0 0 26px}.task-bar{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--ink);border-bottom:1px solid var(--rule);padding:10px 0;margin-bottom:24px;gap:12px;font-size:12px}.task-bar strong{font-size:12px}.task-bar .task-count{font:11px var(--mono);color:var(--muted);white-space:nowrap}.device-label{font:10px var(--mono);letter-spacing:1.4px;color:var(--muted);margin-bottom:12px;display:flex;align-items:center;gap:12px}.device-label:after{content:"";height:1px;background:var(--rule);flex:1}.matrix{display:inline-grid;position:relative;gap:4px;padding:6px 14px;font:27px/1.4 var(--mono);font-variant-numeric:tabular-nums;flex-shrink:0}.matrix:before,.matrix:after{content:"";position:absolute;top:0;bottom:0;width:7px;border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}.matrix:before{left:0;border-left:2px solid var(--ink)}.matrix:after{right:0;border-right:2px solid var(--ink)}.matrix-cell{min-width:40px;text-align:center;padding:4px 9px}.matrix-cell small{font-size:12px}.matrix-symbol{font:italic 25px var(--serif);margin-right:10px}.dimension-display{display:flex;align-items:center;justify-content:center;gap:16px;min-height:102px;margin:2px 0 20px}.dimension-box{display:flex;flex-direction:column;align-items:center;gap:8px}.dimension-box>span{font-size:10px;color:var(--muted)}.dimension-token{padding:10px 20px;border:1px solid var(--ink);font:32px var(--mono);background:#eae7dc}.dimension-token b{font-weight:400;color:var(--orange)}.operator{font:28px var(--serif);color:var(--muted)}.dimension-placeholder{font:30px var(--mono);border:1px dashed var(--rule);padding:10px 20px;min-width:109px;text-align:center}.gate-options{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:20px 0 24px}.gate-option{border:1px solid var(--ink);background:transparent;min-height:146px;padding:16px 13px;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:background .15s,transform .15s}.gate-option:before{content:"";position:absolute;top:0;left:8px;right:8px;height:5px;border-left:1px solid var(--ink);border-right:1px solid var(--ink);border-bottom:1px solid var(--ink)}.gate-option .gate-name{font:10px var(--mono);letter-spacing:1px;color:var(--muted);position:absolute;top:17px;left:13px}.gate-option .gate-size{font:29px var(--mono);margin-top:14px}.gate-option .gate-sub{font-size:10px;color:var(--muted);margin-top:10px}.gate-option:hover:not(:disabled){background:var(--orange-pale);transform:translateY(-3px)}.gate-option.selected{background:var(--green-pale);border:2px solid var(--green)}.gate-option.wrong{background:var(--orange-pale);border-color:var(--red)}.gate-option .connector{position:absolute;bottom:-8px;width:14px;height:8px;background:var(--ink)}.result-choices{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin:20px 0}.result-choice{border:1px solid var(--ink);padding:12px 22px;background:transparent;font:22px var(--mono)}.result-choice:hover:not(:disabled){background:var(--orange-pale)}.result-choice.selected{border-color:var(--green);background:var(--green-pale)}.feedback{min-height:57px;border-left:3px solid var(--rule);padding:10px 14px;font-size:12px;line-height:1.8;margin:22px 0 0;display:flex;align-items:center}.feedback p{margin:0}.feedback.is-error{border-color:var(--red);background:#f0e3d7;color:#813728}.feedback.is-success{border-color:var(--green);background:var(--green-pale);color:#2e5543}.feedback.is-info{background:#eae8de}.mission-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--rule);padding-top:19px;margin-top:25px;min-height:65px}.hint-button{display:flex;align-items:center;gap:8px;background:none;border:0;padding:7px 0;font-size:11px;color:var(--muted)}.hint-button:before{content:"?";border:1px solid currentColor;border-radius:50%;width:17px;height:17px;font:11px/15px var(--mono);text-align:center}.hint-button:hover{color:var(--orange)}.hint-text{font-size:12px;color:var(--muted);padding:12px 0 0;margin:0}.hint-text[hidden]{display:none}.completion-note{border:1px solid var(--green);padding:21px 23px;margin-top:24px;display:flex;align-items:center;gap:20px;background:var(--green-pale);animation:reveal .35s ease}.completion-stamp{font:700 18px var(--serif);border:2px solid var(--green);color:var(--green);padding:9px 12px;transform:rotate(-7deg);white-space:nowrap}.completion-note p{margin:0;font-size:12px;line-height:1.8}.power-desk{display:grid;grid-template-columns:1fr 58px 1fr;align-items:start;gap:12px;margin:15px 0 18px}.power-source{text-align:center}.power-source .device-label{justify-content:center;margin-bottom:14px}.power-source .device-label:after{display:none}.row-matrix{display:flex;flex-direction:column;gap:5px;position:relative;border-left:2px solid var(--ink);border-right:2px solid var(--ink);padding:6px}.row-choice{display:grid;grid-template-columns:26px 1fr 1fr;align-items:center;gap:5px;border:1px solid transparent;background:transparent;padding:9px 6px;text-align:center;font:26px var(--mono);min-height:60px}.row-choice .row-label{font:9px/1.5 "Malgun Gothic",sans-serif;color:var(--muted)}.row-choice:hover:not(:disabled){background:#eae7dc;border-color:var(--rule)}.row-choice.selected{background:var(--orange-pale);border-color:var(--orange)}.column-matrix{display:grid;grid-template-columns:1fr 1fr;gap:5px;border-left:2px solid var(--ink);border-right:2px solid var(--ink);padding:6px}.column-choice{display:flex;flex-direction:column;align-items:center;gap:11px;border:1px solid transparent;background:transparent;padding:3px 8px 10px;font:26px var(--mono);min-height:125px}.column-choice .column-label{font:9px "Malgun Gothic",sans-serif;color:var(--muted)}.column-choice:hover:not(:disabled){background:#eae7dc;border-color:var(--rule)}.column-choice.selected{background:var(--green-pale);border-color:var(--green)}.desk-multiply{font:27px var(--serif);text-align:center;align-self:center}.matrix-caption{font-size:10px;color:var(--muted);margin:10px 0 0}.circuit-strip{display:flex;align-items:center;justify-content:center;gap:10px;padding:16px 0;border-top:1px dashed var(--rule);border-bottom:1px dashed var(--rule);font-size:11px;min-height:65px}.circuit-node{width:32px;height:32px;border:1px solid var(--rule);display:grid;place-items:center;font:14px var(--mono);background:var(--paper)}.circuit-wire{height:1px;width:28px;background:var(--rule)}.circuit-node.a-live{border-color:var(--orange);background:var(--orange-pale);color:var(--orange)}.circuit-node.b-live{border-color:var(--green);background:var(--green-pale);color:var(--green)}.circuit-wire.live{height:2px;background:var(--green)}.power-target-row{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:23px 0 12px}.target-label{font-size:12px}.target-label strong{color:var(--orange);font-weight:700}.target-matrix{font-size:15px;padding:3px 9px;gap:3px}.target-matrix .matrix-cell{padding:3px 8px;min-width:28px}.target-matrix .target-cell{background:var(--orange);color:var(--paper)}.calculation-form{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:11px;padding:20px 8px 3px}.calculation-form label{font:22px/1.5 var(--mono)}.calculation-form label .factor-a{color:var(--orange)}.calculation-form label .factor-b{color:var(--green)}.number-input{width:82px;min-height:45px;background:#fffdf5;border:1px solid var(--ink);text-align:center;font:24px var(--mono);padding:6px}.number-input::-webkit-inner-spin-button{appearance:none}.power-standby{min-height:70px;display:grid;place-items:center;color:var(--muted);font-size:12px;text-align:center}.cipher-form{margin:0}.cipher-matrices{display:flex;justify-content:center;align-items:center;gap:21px;padding:14px 0 25px;flex-wrap:wrap}.cipher-inputs{display:flex;align-items:center;justify-content:center;gap:20px;padding:25px 8px;background:#e9e7dc;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.cipher-answer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;position:relative;padding:7px 15px;border-left:2px solid var(--ink);border-right:2px solid var(--ink)}.cipher-field{display:flex;flex-direction:column;gap:4px;text-align:center}.cipher-field label{font-size:9px;color:var(--muted)}.cipher-field input{width:75px;height:45px;font-size:24px}.cipher-field input.correct{border:2px solid var(--green);background:var(--green-pale);color:var(--green)}.cipher-field input.incorrect{border:2px solid var(--red);background:var(--orange-pale)}.lock-display{display:flex;gap:6px;margin:15px 0}.lock-digit{width:29px;height:40px;border:1px solid var(--ink);background:var(--ink);color:var(--paper);font:22px/38px var(--mono);text-align:center}.lock-digit.open{background:var(--green);border-color:var(--green);animation:digit-in .3s ease}.cipher-submit-row{display:flex;justify-content:center;margin-top:20px}.identity-equation{display:flex;align-items:center;justify-content:center;gap:20px;padding:13px 0 23px;flex-wrap:wrap}.unknown-key{width:75px;height:83px;border:2px dashed var(--orange);display:grid;place-items:center;font:38px var(--serif);color:var(--orange);transform:rotate(-3deg)}.key-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:20px 0}.key-choice{background:transparent;border:1px solid var(--ink);padding:16px 8px;display:flex;flex-direction:column;align-items:center;position:relative;gap:18px;transition:background .15s,transform .15s}.key-choice:before{content:"";width:20px;height:12px;border:1px solid var(--ink);border-bottom:0;position:absolute;top:-13px;left:calc(50% - 10px)}.key-choice .key-label{font:10px var(--mono);letter-spacing:1px;color:var(--muted)}.key-choice .matrix{font-size:21px}.key-choice .matrix-cell{min-width:26px;padding:3px 7px}.key-choice:hover:not(:disabled){background:var(--orange-pale);transform:translateY(-3px)}.key-choice.selected{background:var(--green-pale);border:2px solid var(--green)}.key-choice.wrong{background:var(--orange-pale);border-color:var(--red)}.key-preview{padding:17px 8px;border-top:1px dashed var(--rule);text-align:center;min-height:100px;font-size:12px}.key-preview .matrix{font-size:20px;vertical-align:middle;margin:0 13px}.key-preview .matrix-cell{padding:2px 6px;min-width:28px}.identity-reason{margin-top:22px}.identity-reason>p{font-size:12px;font-weight:700;margin:0 0 13px}.reason-choice{display:block;width:100%;text-align:left;padding:12px 14px;background:transparent;border:1px solid var(--rule);font-size:12px;margin-top:8px}.reason-choice:hover:not(:disabled){border-color:var(--ink);background:#eae7dc}.reason-choice.selected{background:var(--green-pale);border-color:var(--green)}.reason-choice.wrong{border-color:var(--red);background:var(--orange-pale)}.end-screen{min-height:645px}.end-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:27px}.end-heading h1{font:700 47px/1.4 var(--serif);letter-spacing:-2px;margin:0}.exit-stamp{font:700 21px/1.4 var(--serif);border:3px double var(--green);color:var(--green);padding:10px 18px;transform:rotate(-9deg);text-align:center}.end-lead{font-size:13px;color:var(--muted);margin:22px 0 30px}.record-header{display:flex;justify-content:space-between;gap:10px;font:10px var(--mono);letter-spacing:1px;border-bottom:1px solid var(--ink);padding-bottom:10px}.learning-record{list-style:none;padding:0;margin:0}.learning-record li{display:grid;grid-template-columns:29px minmax(0,1fr) auto;gap:13px;padding:17px 0;border-bottom:1px solid var(--rule);align-items:start}.record-no{font:14px var(--mono);color:var(--orange);padding-top:3px}.learning-record strong{font-size:12px}.learning-record p{font-size:11px;color:var(--muted);margin:4px 0 0;line-height:1.8}.record-check{color:var(--green);font-size:15px}.end-actions{display:flex;align-items:center;gap:15px;flex-wrap:wrap;margin-top:29px}.end-note{font-size:10px;color:var(--muted);margin-top:17px}.observation-note{border-left:2px solid var(--orange);padding-left:12px;font-size:11px;color:var(--muted);margin:20px 0 0}.stage-body{animation:reveal .25s ease}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}dialog{border:1px solid var(--ink);background:var(--paper);color:var(--ink);padding:32px;width:calc(100% - 40px);max-width:430px;box-shadow:6px 6px 0 #27312e40}dialog::backdrop{background:#202b2870}dialog h2{font:700 25px var(--serif);margin:16px 0}dialog p{font-size:12px;color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:25px}.noscript{position:fixed;bottom:0;left:0;right:0;padding:15px;background:var(--orange-pale);text-align:center}
@keyframes reveal{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes digit-in{from{transform:translateY(-7px);opacity:.2}to{transform:translateY(0);opacity:1}}
@media(min-width:1500px){.page-shell{padding-top:20px}.lab-frame{min-height:780px}.intro{min-height:695px}main{padding-top:47px}}
@media(max-width:1100px){.page-shell{padding:0 24px}.lab-frame{grid-template-columns:220px minmax(0,1fr)}.field-notes{padding:23px 18px}.mission-link.active:before{left:-19px}main{padding:32px 30px}.intro-illustration{width:41%;right:-10px;top:130px}.intro h1{font-size:43px}.intro-copy{max-width:310px;font-size:13px}.power-desk{grid-template-columns:1fr 25px 1fr;gap:7px}.gate-option .gate-size{font-size:25px}}
@media(max-width:800px){.page-shell{padding:0 15px}.masthead{min-height:88px}.brand-mark{width:44px;height:44px;font-size:19px}.brand-name{font-size:20px}.brand-name small{font-size:8px;letter-spacing:1px}.edition{display:none}.lab-frame{display:block;min-height:0}.field-notes{border-right:0;border-bottom:1px solid var(--ink);padding:14px 18px}.notes-top,.sidebar-title,.lab-map,.notebook-bottom{display:none}#mission-nav{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.mission-link{border:0!important;padding:6px 0;gap:7px;justify-content:center}.mission-link .mission-number{font-size:12px;min-width:0}.mission-link .mission-name{font-size:11px}.mission-link .mission-state{display:none}.mission-link.active:before{left:0;right:0;top:auto;bottom:-15px;width:auto;height:3px}.intro{min-height:620px}.intro h1{font-size:47px}.intro-illustration{width:40%;top:120px}.intro-copy{max-width:350px}main{padding:28px 28px}.page-footer{font-size:9px}.mission-header h1{font-size:30px}.end-screen{min-height:600px}}
@media(max-width:520px){.page-shell{padding:0 9px}.masthead{min-height:78px;gap:8px}.brand{gap:10px}.brand-name{font-size:18px}.brand-name small{font-size:7px;letter-spacing:.9px}.masthead-right{gap:10px}.text-button{font-size:10px}.field-notes{padding:11px 12px}#mission-nav{gap:4px}.mission-link{gap:5px}.mission-link .mission-number{font-size:10px}.mission-link .mission-name{font-size:10px}.mission-link.active:before{bottom:-12px}.lab-frame{box-shadow:3px 3px 0 #d6d1c4}main{padding:25px 18px}.intro{min-height:680px}.intro h1{font-size:39px;letter-spacing:-2px;margin-top:23px}.intro-copy{max-width:100%;font-size:12px}.intro-illustration{position:relative;align-self:flex-end;top:auto;right:4px;width:63%;margin-top:-20px;margin-bottom:-12px;max-width:230px}.intro-instructions{padding-top:14px}.intro-rules{gap:12px;margin:13px 0 21px}.intro-rule{display:block;font-size:10px}.intro-rule b{display:block;font-size:15px;margin-bottom:5px}.intro-rule strong{font-size:10px}.primary-button,.secondary-button{padding:11px 16px;font-size:11px;min-height:44px}.start-row{gap:12px}.start-row small{font-size:9px}.intro-kicker .eyebrow{font-size:9px}.mission-header{gap:9px;margin-bottom:17px}.mission-header h1{font-size:27px}.device-status{font-size:9px;padding:4px 6px}.mission-description{font-size:12px;margin-bottom:20px}.task-bar{margin-bottom:20px;font-size:11px}.task-bar strong{font-size:11px}.gate-options{gap:8px;margin:16px 0}.gate-option{min-height:132px;padding:14px 4px}.gate-option .gate-name{font-size:9px;left:8px}.gate-option .gate-size{font-size:23px}.gate-option .gate-sub{font-size:9px}.dimension-display{gap:10px}.dimension-token{font-size:26px;padding:9px 15px}.dimension-placeholder{min-width:82px;font-size:26px;padding:9px 14px}.result-choice{padding:11px 15px;font-size:20px}.power-desk{grid-template-columns:1fr 22px 1fr;gap:6px}.row-choice{font-size:24px;padding:7px 1px;grid-template-columns:20px 1fr 1fr;gap:2px}.row-choice .row-label{font-size:8px}.column-choice{font-size:24px;padding-left:5px;padding-right:5px}.matrix-caption{font-size:9px}.power-source .device-label{font-size:9px;letter-spacing:.5px}.circuit-strip{gap:6px;font-size:10px}.circuit-wire{width:15px}.circuit-node{width:27px;height:29px}.calculation-form{gap:9px;padding-left:0;padding-right:0}.calculation-form label{font-size:19px}.number-input{width:67px}.calculation-form .primary-button{padding:11px 14px}.power-target-row{gap:9px}.target-label{font-size:11px}.cipher-matrices{gap:12px}.cipher-matrices .matrix{font-size:23px;padding:4px 9px}.cipher-matrices .matrix-cell{min-width:32px;padding:4px 7px}.cipher-matrices .matrix-symbol{font-size:21px;margin-right:5px}.cipher-matrices .operator{font-size:23px}.cipher-inputs{gap:17px}.cipher-field input{width:67px}.lock-digit{width:24px;height:35px;font-size:19px;line-height:33px}.lock-display{gap:4px}.device-label{font-size:9px}.cipher-inputs .device-label{letter-spacing:.7px}.identity-equation{gap:10px}.identity-equation .matrix{font-size:22px;padding:4px 9px}.identity-equation .matrix-cell{min-width:28px;padding:3px 6px}.unknown-key{width:49px;height:68px;font-size:30px}.identity-equation .operator{font-size:22px}.key-choices{gap:8px}.key-choice{padding:13px 2px;gap:11px}.key-choice .matrix{font-size:19px;padding:3px 8px}.key-choice .matrix-cell{min-width:22px;padding:3px 4px}.key-choice .key-label{font-size:9px}.key-preview .matrix{margin:0 6px}.key-preview{font-size:10px}.feedback{font-size:11px;margin-top:18px}.mission-footer{gap:10px;min-height:65px}.completion-note{padding:17px 12px;gap:14px}.completion-stamp{font-size:15px;padding:8px}.completion-note p{font-size:11px}.end-heading h1{font-size:36px}.exit-stamp{font-size:16px;padding:8px 12px}.end-lead{font-size:12px}.learning-record li{gap:10px}.learning-record p{font-size:10px}.end-actions{gap:10px}.end-actions .primary-button,.end-actions .secondary-button{padding:10px 13px}.page-footer{padding:15px 1px;gap:8px;font-size:8px}.dialog-actions{gap:8px}dialog{padding:25px}.task-bar .task-count{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.masthead-right,.field-notes,.mission-footer,.end-actions,.page-footer,.start-row{display:none!important}.page-shell{padding:0}.lab-frame{border:0;box-shadow:none;display:block}main{padding:20px}.end-screen{min-height:0}body{background:white}.exit-stamp{color:black;border-color:black}.learning-record li{break-inside:avoid}}
/* Keep the entry action in view on classroom laptop screens. */
.brand-mark{display:flex;align-items:center;justify-content:center}
.intro{min-height:532px}
@media(min-width:1500px){.intro{min-height:650px}}
@media(max-width:800px){.intro{min-height:560px}}
@media(max-width:520px){.intro{min-height:680px}}
@media(max-width:520px){
  .dimension-display{display:grid;grid-template-columns:minmax(0,1fr) 14px minmax(0,1fr) 14px minmax(0,1fr);gap:4px}
  .dimension-box{min-width:0;width:100%}
  .dimension-box>span{font-size:9px;white-space:nowrap}
  .dimension-token,.dimension-placeholder{font-size:20px;padding:9px 4px;min-width:0;width:100%;text-align:center;white-space:nowrap}
  .dimension-display>.operator{font-size:20px;text-align:center}
  .identity-equation{display:grid;grid-template-columns:minmax(0,1fr) 12px 45px 12px minmax(0,1fr);gap:6px;justify-items:center}
  .identity-equation .matrix{font-size:20px;padding:4px 8px}
  .identity-equation .matrix-cell{min-width:24px;padding:3px 4px}
  .identity-equation .unknown-key{width:45px}
}
.intro-illustration{width:37%;max-width:300px;right:8px;top:65px}
@media(max-width:1100px){.intro-illustration{width:34%;top:85px;right:0}}
@media(max-width:800px){.intro-illustration{width:31%;top:120px}}
@media(max-width:520px){.intro-illustration{position:relative;width:63%;max-width:230px;top:auto;right:4px}}