:root{--ink:#182d2b;--muted:#62716d;--green:#19614d;--lime:#dbf298;--line:#dce3dd;--paper:#f6f7f2;--white:#fff;--orange:#a64b25}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:14px;line-height:1.65}
button,a,summary{-webkit-tap-highlight-color:transparent}
button{font:inherit;cursor:pointer}
button:disabled{opacity:.45;cursor:default}
a{color:var(--green)}
button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #c66c32;outline-offset:4px}
[hidden]{display:none!important}
.topbar{height:80px;display:flex;align-items:center;justify-content:space-between;padding:0 5%;border-bottom:1px solid var(--line);background:white}
.brand{display:flex;align-items:center;gap:10px;font-size:23px;font-weight:750;text-decoration:none;color:var(--ink);letter-spacing:-1px}
.brand-icon{display:grid;place-items:center;width:35px;height:35px;background:var(--green);color:var(--lime);border-radius:9px;font-size:23px;position:relative}
.brand-icon span{font-size:15px;position:absolute;right:3px;top:-2px}
.brand-divider{margin:0 12px;color:#b8c3bb;font-weight:400}
.brand-sub,.header-actions{font-size:12px;font-weight:500;letter-spacing:0;color:var(--muted)}
.header-actions{display:flex;gap:10px;align-items:center}
.live-dot{width:7px;height:7px;background:#6d9958;border-radius:50%}
.small-button{border:1px solid var(--line);background:white;border-radius:6px;padding:7px 12px;color:var(--ink)}
.header-actions button{margin-left:15px}
.safety{background:#eaf0e5;color:#496044;text-align:center;font-size:11px;letter-spacing:.5px;padding:9px 16px}
.safety>span:first-child{margin-right:8px}
main{max-width:1320px;margin:auto;padding:0 40px}
.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:70px;align-items:center;padding:57px 0 42px}
.eyebrow{font-size:10px;letter-spacing:1.6px;font-weight:750;color:var(--green);margin:0 0 15px}
h1{font-size:clamp(32px,3.3vw,49px);line-height:1.23;letter-spacing:-1.8px;margin:0 0 20px;font-weight:650}
h1 em{font-style:normal;color:var(--green)}
.hero-copy{color:var(--muted);max-width:610px;font-size:15px;line-height:1.8;margin:0}
.hero-note{border-left:1px solid #ccd8c9;padding:8px 0 8px 38px}
.note-symbol{font-size:44px;color:var(--green);line-height:1}
.hero-note p{font-size:17px;line-height:1.8}
.hero-note strong{font-weight:600}
.mono{font-family:monospace;font-size:10px;letter-spacing:1px;color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:10px;background:white;overflow:hidden;margin-bottom:35px}
.step{display:flex;text-align:left;align-items:center;gap:14px;background:none;border:0;border-right:1px solid var(--line);padding:19px;color:var(--muted)}
.step:last-child{border:0}
.step>span{font:13px monospace;background:var(--paper);width:32px;height:32px;border-radius:50%;display:grid;place-items:center}
.step div{font-weight:650;font-size:14px}
.step small{display:block;font-weight:400;font-size:11px;margin-top:2px}
.step.active{background:var(--green);color:white}
.step.active>span{background:#ffffff20;color:var(--lime)}
.section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}
.section-heading .eyebrow{margin-bottom:6px}
h2{font-size:23px;line-height:1.4;letter-spacing:-.6px;margin:0}
h3{font-size:18px;line-height:1.45;margin:0 0 15px}
.label{display:inline-block;font-size:10px;text-transform:uppercase;letter-spacing:.8px;background:#edf1e8;color:#506747;padding:5px 9px;border-radius:4px}
.experience-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px}
.mail-app{border:1px solid #d5dfd7;border-radius:12px;background:white;overflow:hidden;box-shadow:0 8px 30px #203e2710}
.mail-chrome{display:flex;align-items:center;gap:25px;padding:16px 20px;background:#f0f4f0;border-bottom:1px solid var(--line)}
.mail-logo{font-size:14px;white-space:nowrap;letter-spacing:1px}
.mail-logo b{font-weight:400;color:var(--muted);letter-spacing:0}
.mail-search{font-size:11px;color:#718078;background:#e5ebe5;border-radius:6px;padding:7px 15px;flex:1}
.avatar{display:grid;place-items:center;flex-shrink:0;border-radius:50%;background:#eaf0e5;color:#4b6942;width:38px;height:38px;font-size:12px;font-weight:700}
.avatar.tiny{width:28px;height:28px}
.mail-workspace{display:grid;grid-template-columns:155px minmax(0,1fr)}
.mail-sidebar{background:#f8faf7;padding:20px 10px;display:flex;flex-direction:column;gap:6px;border-right:1px solid #edf0ea;font-size:11px}
.compose{background:#e0ebdc;padding:10px 15px;border-radius:7px;margin-bottom:15px;font-size:12px}
.folder{padding:8px 10px}
.folder b{float:right}
.folder.selected{background:#e9efe4;border-radius:5px;color:var(--green)}
.sidebar-bottom{margin-top:auto;padding:35px 10px 4px;color:var(--muted);font-size:10px}
.sidebar-bottom strong,.sidebar-bottom small{display:block}
.email{padding:18px 27px 24px;min-height:430px}
.email-toolbar{display:flex;justify-content:space-between;color:#819084;font-size:12px;padding-bottom:22px}
.email h3{font-size:20px;font-weight:600;line-height:1.5}
.sender{display:flex;align-items:flex-start;gap:10px;margin:22px 0}
.sender strong{font-size:11px}
.sender details{font-size:10px;color:var(--muted)}
summary{cursor:pointer}
.sender-meta{padding:10px;background:#f2f5ef;overflow-wrap:anywhere;max-width:320px;margin-top:8px}
.email-time{margin-left:auto;font-size:10px;color:var(--muted)}
.email-body{font-size:12px;color:#44534d;line-height:1.9}
.email-body p{margin:0 0 17px}
.email-body .email-cta{border:0;border-radius:5px;background:#29694f;color:white;padding:11px 22px;font-size:12px;font-weight:600;margin-bottom:17px}
.email-body .signature{font-size:11px;color:#7b877f}
.email-footer{border-top:1px solid #edf0ea;padding-top:14px;font-size:9px;color:#8b958e;margin-top:25px}
.destination{border:1px dashed #b5c8af;border-radius:5px;padding:8px 10px;margin:10px 0;font-size:10px;background:#f6f9f2}
.destination span{display:block;color:var(--muted)}
code{overflow-wrap:anywhere;font-size:12px}
.decision-panel{padding:5px 0}
.scenario-options{margin:13px 0 25px}
.scenario{display:flex;gap:10px;width:100%;text-align:left;border:1px solid var(--line);background:transparent;border-radius:7px;padding:12px;margin:7px 0;font-size:11px;color:var(--muted)}
.scenario span{font-weight:600;font-size:12px;color:var(--ink)}
.scenario.active{background:#eaf1e0;border-color:#8aa777;color:var(--green)}
.decision-copy h3{font-size:16px;margin-bottom:8px}
.decision-copy p{font-size:12px;color:var(--muted)}
.decision-buttons{display:grid;gap:9px;margin-top:22px}
.button{border-radius:6px;font-size:12px;font-weight:600;padding:12px 17px;border:1px solid transparent;transition:background .15s}
.primary{background:var(--green);color:white}
.primary:hover{background:#124a3a}
.secondary{border-color:#cfd9cb;background:white;color:var(--ink)}
.secondary:hover{background:#eaf0e5}
.caption{font-size:10px;color:var(--muted)}
.feedback{border-left:3px solid var(--green);background:#eaf2e0;padding:14px;font-size:12px;margin-top:17px;color:#2d4a30}
.bottom-nav{display:flex;align-items:center;justify-content:space-between;padding:28px 0}
.bottom-nav>span{font:11px monospace;color:var(--muted)}
footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:23px 0 30px}
footer .brand{font-size:16px}
.footer-tag{font-size:11px;color:var(--muted);letter-spacing:0;font-weight:400;margin-left:15px}
.text-button{border:0;background:none;color:var(--muted);font-size:11px}
.surface{padding:28px;border:1px solid var(--line);border-radius:10px;background:white}
.surface p{color:var(--muted);font-size:13px}
.analysis-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:24px}
.surface .label{margin-bottom:17px}
.dark{background:#173e32;border:0;color:#fff}
.dark p{color:#c4d7ca}
.dark .eyebrow{color:var(--lime)}
.url-example{padding:22px 0;font:14px/2 monospace;overflow-wrap:anywhere}
.url-example span{color:#9ab7a5}
mark{background:var(--lime);color:#213a26;padding:3px}
.url-steps{margin:8px 0 14px;padding-left:20px}
.url-steps li{font-size:13px;line-height:1.7;margin:6px 0;color:#c4d7ca}
.url-steps li strong,.url-steps li mark{color:inherit}
.url-steps li mark{color:#213a26}
.dark-note{padding:17px;border:1px solid #527561;border-radius:6px;font-size:13px;margin-top:25px}
.clue{display:flex;gap:13px;border-top:1px solid var(--line);padding:17px 0}
.clue:last-child{padding-bottom:0}
.clue>span{font:12px monospace;color:var(--orange);padding-top:3px}
.clue strong{font-size:13px}
.clue p{margin:4px 0 0;font-size:12px}
.takeaway{display:flex;align-items:center;gap:20px;background:#e9efdf;border-radius:8px;margin-top:24px;padding:16px 25px}
.takeaway>span{font-size:30px}
.takeaway p{font-size:13px}
.knowledge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card-number{font:10px monospace;color:var(--green);letter-spacing:1px}
.knowledge-grid h3{margin:16px 0 10px}
.learning-columns{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:22px}
.learning-columns details{border-top:1px solid var(--line);padding:15px 0;font-size:13px}
.learning-columns summary{font-weight:600}
.learning-columns details p{font-size:12px;margin-bottom:0}
.incident{background:#f1f3e9}
.incident-list{padding-left:20px}
.incident-list li{padding:7px 0 7px 8px;font-size:13px}
.incident-list p{margin:5px 0;font-size:12px}
.sources{display:flex;gap:20px;font-size:11px;flex-wrap:wrap;margin:22px 0 0}
.quiz-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:60px}
.quiz-card{min-height:380px}
.quiz-meta{display:flex;justify-content:space-between;font:11px monospace;color:var(--muted)}
.progress-track{height:4px;background:#edf0e7;margin:15px 0 28px;border-radius:3px}
.progress-track div{height:100%;background:var(--green);transition:width .2s}
#answers{display:grid;gap:10px}
.answer{border:1px solid var(--line);padding:13px 17px;text-align:left;border-radius:6px;background:#fafbf7;font-size:13px;color:var(--ink)}
.answer.correct{background:#e5f1d9;border-color:#75a366}
.answer.wrong{background:#fbece2;border-color:#b37d5c}
.answer:disabled{opacity:1}
.quiz-card>.button{margin-top:20px}
.quiz-note{padding:30px 0}
.quiz-note h3{font-size:25px;margin-top:20px}
.quiz-note p{color:var(--muted);max-width:310px}
.presenter{padding:18px 24px;border:1px dashed #90a781;background:#edf3e4;border-radius:8px;margin-bottom:25px;font-size:12px}
.presenter p{margin:5px 0 12px}
.timer{display:flex;align-items:center;gap:10px}
.timer>span{font:20px monospace;margin-right:10px}
dialog{border:0;border-radius:14px;padding:36px;max-width:520px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 30px 100px #0003}
dialog::backdrop{background:#10241dd0}
dialog h2{margin:20px 0 12px}
dialog p{font-size:13px;color:var(--muted)}
.dialog-close{position:absolute;right:15px;top:10px;background:none;border:0;font-size:28px;color:var(--muted)}
.url-box{background:var(--paper);padding:16px;border-radius:7px}
.url-box span{display:block;font-size:10px;color:var(--muted);margin-bottom:6px}
.skip{position:absolute;top:-100px;background:white;padding:10px;z-index:10}
.skip:focus{top:10px}
.noscript{padding:24px;background:#ffe7cd}
h2:focus{outline:none}
@media(min-width:1500px){main{max-width:1420px}
.hero{padding-top:65px}
.email{min-height:470px}
}
@media(max-width:1050px){main{padding:0 25px}
.experience-layout{grid-template-columns:minmax(0,1fr) 240px;gap:20px}
.mail-sidebar{display:none}
.mail-workspace{grid-template-columns:1fr}
.step{padding:15px 10px;gap:8px}
.step small{font-size:10px}
.hero{gap:35px}
.hero-note{padding-left:25px}
.email{padding:18px 20px}
}
@media(max-width:760px){.topbar{height:65px;padding:0 20px}
.brand-sub,.brand-divider,.header-actions>span{display:none}
.header-actions button{font-size:10px;margin-left:0}
.brand{font-size:20px}
.safety{font-size:9px}
.safety-detail{display:block;font-size:9px}
.hero{grid-template-columns:1fr;padding:33px 0;gap:20px}
.hero-note{display:none}
h1{font-size:35px}
.hero-copy{font-size:13px}
.steps{grid-template-columns:1fr 1fr;margin-bottom:25px}
.step{border-bottom:1px solid var(--line);padding:13px}
.step:nth-child(2){border-right:0}
.step small{font-size:9px}
.section-heading{align-items:flex-start}
.section-heading>.label{display:none}
h2{font-size:21px}
.experience-layout,.analysis-grid,.learning-columns,.quiz-layout{grid-template-columns:1fr}
.decision-panel{padding:10px 0}
.scenario-options{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:15px}
.scenario{display:block;padding:10px;font-size:10px}
.scenario span{display:block;font-size:11px}
.decision-buttons{grid-template-columns:1fr 1fr}
.knowledge-grid{grid-template-columns:1fr}
.surface{padding:23px}
.quiz-layout{gap:5px}
.quiz-note{padding:20px}
.quiz-note h3{font-size:21px}
.quiz-note .note-symbol{display:none}
footer{gap:15px}
.footer-tag{display:none}
.email h3{font-size:18px}
.email{padding:15px 18px}
.mail-search{display:none}
.mail-chrome{justify-content:space-between}
.sender-address{overflow-wrap:anywhere}
main{padding:0 16px}
.bottom-nav .button{font-size:11px;padding:10px 13px}
.timer{flex-wrap:wrap}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}
}
@media print{.topbar,.safety,.hero,.steps,.presenter,.bottom-nav,footer,.decision-panel,dialog,.quiz-note{display:none!important}
.stage[hidden]{display:block!important}
.stage{break-inside:avoid;margin:20px 0}
.surface{break-inside:avoid}
.learning-columns,.analysis-grid{grid-template-columns:1fr}
main{padding:0}
.dark{background:white;color:black}
.dark p{color:black}
}
.scenario-context{font-size:12px;color:var(--muted);margin:-5px 0 20px}.scenario-context code{color:var(--green)}

/* Immediate, dismissible fictional security-console popup. */
.cyber-scene{min-height:100svh;background:#050708;display:grid;place-items:center;position:relative;isolation:isolate}
.cyber-grid{position:absolute;inset:0;z-index:-1;background:linear-gradient(#54d0a008 1px,transparent 1px),linear-gradient(90deg,#54d0a008 1px,transparent 1px);background-size:45px 45px;pointer-events:none}
#hacker-popup{padding:0;width:min(600px,calc(100% - 32px));max-height:calc(100svh - 32px);background:#0b1012;color:#e5ebea;border:1px solid #874841;border-radius:8px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;box-shadow:0 0 80px #e2533020,0 30px 100px #0009}
#hacker-popup::backdrop{background:#0009}
.hacker-titlebar{display:flex;justify-content:space-between;align-items:center;padding:9px 14px;border-bottom:1px solid #3c302e;background:#1a1717;font-size:10px;letter-spacing:1px;color:#c0a5a0}
.hacker-titlebar i{display:inline-block;width:6px;height:6px;border-radius:50%;background:#f78870;margin-right:8px}
.hacker-titlebar button{background:none;border:0;font-size:25px;line-height:1;color:#ccb2ac;padding:3px 6px}
.hacker-body{padding:24px 32px 30px;position:relative;overflow:hidden}.popup-meta{display:flex;justify-content:space-between;gap:10px;color:#71847d;font-size:9px;letter-spacing:1px}.popup-meta span:last-child{color:#b2c6ba;border:1px solid #3c5145;border-radius:3px;padding:2px 6px}
.hacker-warning{margin:24px auto 18px;width:54px;height:54px;border:1px solid #cf715b;background:#35211d;color:#f89a7e;display:grid;place-items:center;font-size:31px;border-radius:10px;transform:rotate(-4deg);animation:sim-pulse 1.6s ease-out infinite;transition:background .4s,border-color .4s,color .4s}
.hacker-kicker{text-align:center;color:#e08b71!important;letter-spacing:2px;font-size:10px!important;margin:0 0 12px}
#popup-title{text-align:center;font-family:system-ui,sans-serif;font-size:32px;line-height:1.3;letter-spacing:-.8px;margin:0 0 24px;color:#f1eee8}#popup-title span{color:#f0997d}
.hacker-console{border:1px solid #263930;background:#070c0a;padding:16px;min-height:180px;overflow-wrap:anywhere}.hacker-console p{font-size:11px;line-height:1.8;color:#a1b5a7;margin:3px 0}.hacker-console>p{margin-bottom:12px}.hacker-console>p span{color:#7dcf9b}.hacker-console .warn{color:#e3b376}.hacker-console .success{color:#8bd5a3}.terminal-line span{color:#576f60}.terminal-cursor{color:#8edbab;animation:terminal-blink 1s steps(2,start) infinite}
.hacker-console .prompt span{color:#7dcf9b}
.sim-progress{height:4px;background:#17211d;border-radius:3px;overflow:hidden;margin:14px 0 0}
.sim-progress-bar{height:100%;width:0;background:linear-gradient(90deg,#e0603a,#f0997d);transition:width .35s ease;box-shadow:0 0 10px #e2533066}
.hacker-status{display:flex;justify-content:space-between;gap:10px;color:#83968b;font-size:9px;margin:12px 0 23px}
.sim-reveal{border:1px solid #3c5145;background:#0d1714;border-left:3px solid #8bd5a3;border-radius:6px;padding:16px 18px;margin:0 0 22px}
.sim-reveal strong{display:block;color:#8bd5a3;font-size:13px;letter-spacing:.5px;margin-bottom:8px}
.sim-reveal p{color:#a9bcb2;font-size:12px;line-height:1.8;margin:0}
.sim-reveal b{color:#e8efe9}
.hacker-body::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(0deg,#00000000 0,#00000000 2px,#0b100f66 3px,#00000000 4px);animation:sim-flicker 5s steps(60) infinite;z-index:3}
#hacker-popup.revealed{border-color:#4d7a5f;box-shadow:0 0 70px #2e8b5720,0 30px 100px #0009}
#hacker-popup.revealed .hacker-warning{border-color:#4d7a5f;background:#16251d;color:#8bd5a3;transform:rotate(0);animation:none}
@keyframes sim-flicker{0%,100%{opacity:.35}48%{opacity:.5}50%{opacity:.15}52%{opacity:.5}}
@keyframes sim-pulse{0%,100%{box-shadow:0 0 0 0 #e2533055}70%{box-shadow:0 0 0 10px #e2533000}}
.lesson-entry{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:13px 20px;border:1px solid #8db49b;border-radius:4px;background:#a7dbb5;color:#10281a;text-decoration:none;font-family:system-ui,sans-serif;font-size:14px;font-weight:650}.lesson-entry:hover{background:#c6ecd0}.lesson-entry:focus-visible,#hacker-popup button:focus-visible{outline:2px solid #fff;outline-offset:4px}
@keyframes terminal-blink{to{visibility:hidden}}
@media(max-width:600px){.hacker-body{padding:18px}#popup-title{font-size:27px}.hacker-titlebar{font-size:9px}.hacker-console{padding:12px}.hacker-console p{font-size:10px}.popup-meta{font-size:8px}.hacker-warning{margin-top:20px}.hacker-status{font-size:8px}}
@media(prefers-reduced-motion:reduce){.terminal-cursor,.hacker-warning,.hacker-body::after{animation:none}.hacker-body::after{display:none}.sim-progress-bar{transition:none}}
@media print{.cyber-scene{display:none!important}#lesson[hidden]{display:block!important}}