.method-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:26px 0}.method-strip>div{display:flex;align-items:center;gap:10px;background:var(--cream);border:2px solid var(--ink);padding:14px}.method-strip b{display:grid;place-items:center;flex:0 0 34px;height:34px;background:var(--ink);color:#fff;border-radius:50%}.method-strip span{display:grid;gap:3px;font-size:.78rem}.method-strip strong{font-size:.92rem}.case-picker{margin:34px 0 16px}.case-picker h2{margin-bottom:12px}.case-tabs{display:flex;gap:9px;flex-wrap:wrap}.case-tab{border:2px solid var(--ink);background:#fff;padding:10px 13px;cursor:pointer;box-shadow:3px 3px 0 var(--ink)}.case-tab[aria-selected="true"]{background:var(--sun);transform:translateY(-2px)}.case-tab[data-result="guided"]:after,.case-tab[data-result="clean"]:after{content:" ✓";color:var(--green);font-weight:900}.case-tab:focus-visible{outline:4px solid var(--blue);outline-offset:3px}.game-card{background:var(--cream);border:3px solid var(--ink);box-shadow:var(--shadow);padding:24px}.game-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;border-bottom:2px dashed var(--ink);padding-bottom:16px}.game-heading h2{font-size:clamp(1.8rem,3vw,2.8rem);margin:4px 0}.game-heading p{line-height:1.55;margin:0}.eyebrow,.case-label{font-weight:900;color:var(--red);letter-spacing:.09em;font-size:.75rem}.case-progress{white-space:nowrap;background:var(--sun);border:2px solid var(--ink);padding:9px 12px;transform:rotate(1deg)}.detector-layout{display:grid;grid-template-columns:1.45fr .8fr;gap:20px;margin-top:20px}.code-board{background:#17231e;color:#edf5df;border:2px solid #08100c;padding:17px;overflow:auto;font-size:clamp(.82rem,1.25vw,.98rem);line-height:2.2}.code-line{display:flex;align-items:center;min-width:max-content}.line-no{width:34px;flex:0 0 34px;color:#91a198;user-select:none}.code-line code{white-space:pre}.code-token{appearance:none;border:1px dashed #f4bd3a;background:#ffffff12;color:#fff4b8;padding:2px 5px;margin:0 2px;font:inherit;cursor:pointer;border-radius:3px}.code-token:hover,.code-token:focus-visible{background:#f4bd3a;color:#17231e;outline:3px solid #fff;outline-offset:2px}.code-token.found{background:#d8f0df;color:#123c2a;border-style:solid;border-color:#d8f0df}.code-token.nudged{animation:clue-pulse .7s ease-in-out 2;background:#e7f0f7;color:#17231e}.case-file{background:var(--paper);border:2px solid var(--ink);padding:18px;box-shadow:4px 4px 0 var(--ink)}.case-file h3{font-size:1.45rem;margin:7px 0}.case-file>p{line-height:1.55;min-height:72px}.clue-list{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:8px}.clue-list li{display:flex;align-items:center;gap:9px;color:var(--muted)}.clue-list li span{display:inline-grid;place-items:center;width:25px;height:25px;border:2px solid currentColor;border-radius:50%;font-weight:900}.clue-list li.found{color:var(--green);font-weight:900}.clue-list li.found span{background:var(--green);color:#fff;border-color:var(--green)}.source-note{font-size:.75rem;color:var(--muted);line-height:1.5}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.classification{margin-top:22px;padding:20px;border:2px solid var(--blue);background:#e7f0f7}.classification[hidden],.conclusion[hidden]{display:none}.classification h3,.conclusion h3{margin:6px 0 8px;font-size:1.55rem}.classification p{line-height:1.55}.runtime-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}.runtime-choice{border:2px solid var(--ink);background:#fff;padding:14px;cursor:pointer;text-align:left;box-shadow:3px 3px 0 var(--ink)}.runtime-choice:hover,.runtime-choice:focus-visible{transform:translateY(-2px);outline:4px solid var(--blue);outline-offset:2px}.runtime-choice.correct{background:#d8f0df}.runtime-choice.wrong{background:#ffe1d3}.conclusion{display:grid;grid-template-columns:1fr auto;align-items:center;gap:18px;margin-top:20px;padding:20px;border:2px solid var(--green);background:#d8f0df}.conclusion p{line-height:1.55}.result-quality{font-weight:900;color:var(--green)}.transfer-note{margin-top:34px;background:var(--sun);border:2px solid var(--ink);box-shadow:var(--shadow);padding:22px}.transfer-note p{line-height:1.6}.feedback{min-height:0}@keyframes clue-pulse{50%{transform:translateY(-3px);box-shadow:0 0 0 4px #f4bd3a}}@media(max-width:850px){.method-strip{grid-template-columns:1fr 1fr}.detector-layout{grid-template-columns:1fr}.game-heading{flex-direction:column}.case-progress{align-self:flex-start}.runtime-choices{grid-template-columns:1fr}.conclusion{grid-template-columns:1fr}}@media(max-width:520px){.method-strip{grid-template-columns:1fr}.game-card{padding:15px}.button-row{flex-direction:column}.button-row .action{width:100%}}

.mode-switch{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:26px 0 8px}.mode-button{display:grid;gap:4px;border:3px solid var(--ink);background:#fff;padding:16px 18px;text-align:left;cursor:pointer;box-shadow:4px 4px 0 var(--ink)}.mode-button span{font-size:1.15rem;font-weight:900}.mode-button small{font-size:.78rem;color:var(--muted)}.mode-button[aria-selected="true"]{background:var(--sun);transform:translateY(-2px)}.mode-button:focus-visible{outline:4px solid var(--blue);outline-offset:3px}.mode-panel[hidden]{display:none}.duel-code-grid{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:stretch;gap:12px;margin-top:20px}.duel-code-card{display:grid;grid-template-rows:auto 1fr;min-width:0;border:2px solid var(--ink);background:var(--paper);padding:10px;transition:transform .15s ease,box-shadow .15s ease}.duel-code-card.active{border-color:var(--blue);box-shadow:5px 5px 0 var(--blue);transform:translateY(-2px)}.duel-code-card.complete{border-color:var(--green)}.duel-code-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:2px 4px 10px}.duel-code-head span{font-size:.72rem;font-weight:900;letter-spacing:.1em;color:var(--red)}.duel-code-head strong{text-align:right}.duel-code-card .code-board{min-height:300px}.versus{align-self:center;display:grid;place-items:center;width:46px;height:46px;border:3px solid var(--ink);border-radius:50%;background:var(--red);color:#fff;font-weight:900;transform:rotate(-4deg)}.duel-question{min-height:205px}.duel-question.motor-stage{background:#fff4cf;border-color:var(--ink)}.duel-question.motor-stage .duel-choices{display:none}.duel-choice{min-height:88px}.duel-choice:disabled,.code-token:disabled{cursor:not-allowed;opacity:.55}.duel-choice:disabled:hover,.code-token:disabled:hover{transform:none;outline:none}.exam-sentence{border-left:5px solid var(--green);padding:10px 14px;background:#fff;font-weight:800}.duel-conclusion{align-items:start}.duel-conclusion .result-quality{margin-bottom:0}

@media(max-width:900px){.duel-code-grid{grid-template-columns:1fr}.versus{width:auto;height:auto;border-radius:0;padding:6px 12px;justify-self:center}.duel-code-card .code-board{min-height:0}.duel-choices{grid-template-columns:1fr}}
@media(max-width:520px){.mode-switch{grid-template-columns:1fr}.mode-button{padding:13px}.duel-code-head{align-items:flex-start;flex-direction:column}.duel-code-head strong{text-align:left}}

.learning-lab{margin:26px 0 18px;padding:22px;border:3px solid var(--ink);background:#fff;box-shadow:var(--shadow)}
.learning-lab-head{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;padding-bottom:16px;border-bottom:2px dashed var(--ink)}
.learning-lab-head h2{margin:5px 0 7px;font-size:clamp(1.45rem,2.5vw,2.1rem)}
.learning-lab-head p{margin:0;line-height:1.5;color:var(--muted)}
.assistance-status{flex:0 0 auto;max-width:250px;padding:9px 12px;border:2px solid var(--ink);background:var(--sun);font-weight:900;text-align:center;transform:rotate(1deg)}
.learning-options{min-width:0;margin:18px 0 0;padding:0;border:0}
.learning-options legend{margin-bottom:9px;font-size:.78rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:var(--red)}
.learning-option-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.learning-option{display:grid;gap:4px;min-width:0;padding:13px;border:2px solid var(--ink);background:var(--paper);text-align:left;cursor:pointer}
.learning-option strong{font-size:1rem}.learning-option span{font-size:.78rem;line-height:1.45;color:var(--muted)}
.learning-option[aria-pressed="true"]{background:#d8f0df;box-shadow:4px 4px 0 var(--ink);transform:translateY(-2px)}
.learning-option:focus-visible,.bank-switch button:focus-visible{outline:4px solid var(--blue);outline-offset:2px}
.bank-switch{display:flex;flex-wrap:wrap;gap:9px}
.bank-switch button{padding:10px 13px;border:2px solid var(--ink);background:#fff;cursor:pointer;font-weight:800}
.bank-switch button[aria-pressed="true"]{background:var(--sun);box-shadow:3px 3px 0 var(--ink)}
.learning-explanation{margin:16px 0 0;padding:12px 14px;border-left:5px solid var(--blue);background:#e7f0f7;line-height:1.5}
#duel-mode-panel[data-support="1"] .code-token{border-color:#91a198;background:transparent;color:#edf5df}
#duel-mode-panel[data-support="0"] .code-token{border-color:transparent;background:transparent;color:#edf5df;padding:0;margin:0;border-radius:0}
#duel-mode-panel[data-support="0"] .code-token:hover{background:transparent;color:#edf5df;outline:none}
#duel-mode-panel[data-support="0"] .code-token:focus-visible{background:#ffffff12;color:#fff;outline:2px solid #fff;outline-offset:2px}
#duel-mode-panel[data-support="0"] .duel-code-card.active{border-color:var(--ink);box-shadow:none;transform:none}
.support-change{font-weight:900;color:var(--green)}

@media(max-width:850px){.learning-option-grid{grid-template-columns:1fr}.learning-lab-head{flex-direction:column}.assistance-status{align-self:flex-start;max-width:none}}
@media(max-width:520px){.learning-lab{padding:15px}.bank-switch{display:grid}.bank-switch button{width:100%}}