:root{--ink:#102b40;--blue:#086bb8;--paper:#f3eddd;--cream:#fffaf0;--gold:#f2b422;--gold-deep:#bb7c00;--red:#b93638;--green:#2a7a4d;--muted:#657582;--line:rgba(16,43,64,.17);--shadow:0 22px 55px rgba(16,43,64,.13)}
*{box-sizing:border-box}html{min-width:320px;scroll-behavior:smooth}body{margin:0;color:var(--ink);background:radial-gradient(circle at 90% 5%,rgba(242,180,34,.19),transparent 25%),linear-gradient(#f7f1e3,#eee4cf);font-family:Arial,"Helvetica Neue",sans-serif}button,select,a{font:inherit}.skip-link{position:fixed;z-index:200;top:10px;left:10px;padding:10px 14px;color:white;background:var(--ink);transform:translateY(-150%)}.skip-link:focus{transform:none}.case-shell{width:min(100% - 48px,1280px);margin:auto}.topbar,.board-header,.stage-heading,.stage-actions,.learning-note,footer{display:flex;align-items:center}.topbar{min-height:102px;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{width:205px}.brand img{display:block;width:100%;height:auto}.case-status{padding:9px 13px;color:var(--muted);border:1px solid var(--line);font-size:10px;font-weight:800;letter-spacing:1.3px;text-transform:uppercase}.case-status span{display:inline-block;width:8px;height:8px;margin-right:6px;background:var(--gold);border-radius:50%;box-shadow:0 0 0 4px rgba(242,180,34,.18)}
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.investigation-board{overflow:hidden;background:rgba(255,250,240,.88);border:1px solid var(--line);box-shadow:var(--shadow)}.board-header{min-height:92px;gap:28px;padding:22px 30px;color:white;background:var(--ink)}.board-header p{color:#91c8eb;letter-spacing:1.5px}.board-header strong{font-size:14px}.progress-track{height:7px;flex:1;overflow:hidden;background:rgba(255,255,255,.16);border-radius:10px}.progress-track span{display:block;width:0;height:100%;background:var(--gold);transition:width .3s ease}.score{min-width:80px;text-align:right}.score small,.score strong{display:block}.score small{color:#91c8eb;font-size:8px;letter-spacing:1.3px}.score strong{margin-top:3px;font-family:Impact,"Arial Black",sans-serif;font-size:28px;letter-spacing:1px}.stage{padding:34px 38px;border-top:1px solid var(--line);transition:.25s ease}.stage.locked{filter:grayscale(.6);opacity:.52;pointer-events:none}.stage-heading{gap:14px}.stage-number{display:grid;width:38px;height:38px;place-items:center;flex:0 0 auto;color:var(--cream);background:var(--ink);border-radius:50%;font-size:11px;font-weight:900}.stage-heading>div{flex:1}.stage-heading p{margin-bottom:3px}.stage-heading h2{margin:0;font-family:Impact,"Arial Black",sans-serif;font-size:clamp(24px,3vw,34px);letter-spacing:.2px}.stage-seal{padding:7px 9px;color:var(--muted);border:1px solid var(--line);font-size:8px;font-weight:900;letter-spacing:1.3px}.stage-seal.done{color:var(--green);border-color:rgba(42,122,77,.4);background:rgba(42,122,77,.08)}.stage-instruction{margin:18px 0 22px;color:var(--muted);font-size:13px;line-height:1.55}
.messages{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.message-card{display:grid;grid-template-columns:46px 1fr;gap:12px;min-width:0;padding:17px;color:var(--ink);background:white;border:2px solid transparent;box-shadow:0 7px 18px rgba(16,43,64,.08);cursor:pointer;text-align:left;transition:.16s ease}.message-card:hover,.message-card:focus-visible{border-color:var(--gold);transform:translateY(-3px);outline:0}.message-card[aria-pressed=true]{border-color:var(--blue);box-shadow:0 0 0 4px rgba(8,107,184,.12)}.sender-icon{display:grid;width:46px;height:46px;place-items:center;color:white;background:var(--ink);border-radius:50%;font-weight:900}.sender-icon.unknown{background:var(--red)}.sender-icon.escola{background:var(--blue);font-size:12px}.message-body{min-width:0}.message-body b,.message-body small,.message-body>span{display:block}.message-body b{font-size:14px}.message-body small{margin:3px 0 12px;color:var(--muted);font-size:9px}.message-body>span{font-size:12px;line-height:1.5}.message-choice{grid-column:1/-1;margin-top:4px;padding-top:10px;color:var(--blue);border-top:1px solid var(--line);font-size:9px;font-weight:900;letter-spacing:1.2px;text-transform:uppercase}.clue-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.clue{position:relative;min-height:132px;padding:20px 17px 16px;color:var(--ink);background:var(--paper);border:2px solid transparent;cursor:pointer;text-align:left;transition:.16s ease}.clue>span{position:absolute;top:10px;right:12px;color:rgba(16,43,64,.25);font-family:Impact,sans-serif;font-size:25px}.clue b,.clue small{display:block}.clue b{max-width:85%;margin-top:22px;font-size:13px}.clue small{margin-top:7px;color:var(--muted);font-size:10px;line-height:1.45}.clue:hover,.clue:focus-visible{border-color:var(--gold);outline:0}.clue[aria-pressed=true]{color:white;background:var(--ink);border-color:var(--gold)}.clue[aria-pressed=true] small{color:#cbdce8}.clue[aria-pressed=true]>span{color:var(--gold)}.stage-actions{justify-content:flex-end;gap:18px;margin-top:20px}.stage-actions>span{margin-right:auto;color:var(--muted);font-size:11px}.verify-button:disabled{cursor:not-allowed;filter:grayscale(1);opacity:.45}.feedback{min-height:20px;margin:14px 0 0;font-size:12px;font-weight:800}.feedback.success{color:var(--green)}.feedback.error{color:var(--red)}.report-form{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.report-form label>span{display:block;margin-bottom:7px;color:var(--muted);font-size:9px;font-weight:900;letter-spacing:1.1px}.report-form select{width:100%;min-height:48px;padding:0 38px 0 13px;color:var(--ink);background:white;border:2px solid var(--line);border-radius:2px}.report-form select:focus{border-color:var(--gold);outline:3px solid rgba(242,180,34,.18)}.final-actions{justify-content:space-between}
.learning-note{gap:20px;margin-top:24px;padding:28px 32px;background:#e3edf4;border-left:7px solid var(--blue)}.learning-note>span{font-size:42px}.learning-note p{color:var(--blue);margin-bottom:4px}.learning-note h2{margin:0 0 7px;font-family:Impact,"Arial Black",sans-serif;font-size:25px}.learning-note div>span{color:var(--muted);font-size:12px;line-height:1.5}footer{min-height:118px;justify-content:space-between;color:var(--muted);font-size:11px}footer>span{font-weight:900;letter-spacing:1.6px}footer p{font-style:italic}
.modal,.success-overlay{position:fixed;z-index:100;inset:0;display:grid;place-items:center;padding:22px;background:rgba(16,43,64,.9);backdrop-filter:blur(4px)}.modal[hidden]{display:none}.modal-card,.success-card{position:relative;width:min(100%,620px);padding:40px;color:var(--ink);background:var(--cream);border:7px solid white;box-shadow:0 30px 90px rgba(0,0,0,.38)}.modal-close{position:absolute;top:8px;right:12px;width:40px;height:40px;color:var(--ink);background:transparent;border:0;cursor:pointer;font-size:31px}.modal-card h2,.success-card h2{margin:0 0 18px;font-family:Impact,"Arial Black",sans-serif;font-size:clamp(29px,5vw,46px);line-height:1.05}.modal-card ol{display:grid;gap:8px;margin:0 0 20px;padding-left:24px;color:var(--muted);font-size:13px}.solution-report{padding:16px;color:white;background:var(--ink)}.solution-report span,.solution-report b{display:block}.solution-report span{margin-bottom:5px;color:var(--gold);font-size:9px;font-weight:900;letter-spacing:1.3px}.solution-report b{font-size:13px;line-height:1.5}.modal-action{width:100%;margin-top:18px;border:0}.success-card{text-align:center}.success-stamp{display:grid;width:72px;height:72px;place-items:center;margin:0 auto 18px;color:var(--ink);background:var(--gold);border:5px solid white;border-radius:50%;box-shadow:0 0 0 4px var(--gold);font-size:38px;font-weight:900;transform:rotate(-7deg)}.success-card>p{color:var(--gold-deep)}.success-card>span{color:var(--muted);line-height:1.5}.final-score{margin:24px auto;width:190px;padding:14px;color:white;background:var(--ink)}.final-score small,.final-score strong{display:block}.final-score small{color:#91c8eb;font-size:8px;letter-spacing:1.4px}.final-score strong{margin-top:4px;font-family:Impact,sans-serif;font-size:35px}.success-card button{min-height:46px;padding:0 20px;color:var(--ink);background:var(--gold);border:0;cursor:pointer;font-weight:900}
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@media(max-width:620px){.case-shell{width:min(100% - 24px,1280px)}.topbar{min-height:80px}.brand{width:150px}.case-status{width:12px;height:12px;padding:0;overflow:hidden;border:0}.case-status span{margin:2px}.case-hero{padding:38px 0}.hero-copy h1{font-size:clamp(48px,16vw,70px)}.hero-copy>p:last-of-type{font-size:14px}.hero-actions{align-items:stretch;flex-direction:column}.text-button{align-self:center}.hero-evidence figcaption{flex-direction:column}.board-header{padding:19px}.stage{padding:28px 18px}.stage-heading{align-items:flex-start}.stage-seal{display:none}.messages,.clue-grid{grid-template-columns:1fr}.stage-actions{align-items:stretch;flex-direction:column}.stage-actions>span{margin:0}.verify-button{width:100%}.learning-note{align-items:flex-start;padding:22px 18px}.modal-card,.success-card{padding:32px 22px}footer{align-items:flex-start;flex-direction:column;justify-content:center;gap:8px}}
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