:root{--paper:#f8f7f2;--ink:#282735;--muted:#666571;--line:#e4e1dc;--purple:#7160d3;--purple-dark:#5140ac;--lavender:#eeeaf9;--coral:#e68e76;--peach:#f8e9e2;--teal:#2e7e73;--mint:#e6f0e9;--white:#fff;--radius:22px;--shadow:0 12px 35px #29213b06}
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33px}.eyebrow{font-size:11px;font-weight:750;letter-spacing:.15em;text-transform:uppercase;color:var(--teal);display:flex;align-items:center;gap:8px;margin-bottom:13px}.eyebrow:before{content:"";width:6px;height:6px;background:currentColor;border-radius:50%}.hero em{font-style:normal;color:var(--purple)}.hero-aside{align-self:end;padding:0 0 5px}.hero-aside p{max-width:380px;font-size:16px;color:var(--muted);line-height:1.7}.hero-meta{display:flex;gap:9px;margin-top:18px;flex-wrap:wrap}.pill{font-size:11px;letter-spacing:.02em;display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:30px;background:#eeeae3;color:#575460}.pill.purple{background:var(--lavender);color:var(--purple-dark)}.pill.green{background:var(--mint);color:#376453}.tabs{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:24px;scroll-margin-top:15px}.tab{background:transparent;border:0;padding:18px 12px 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p{font-size:13px;color:var(--muted);line-height:1.7}.nicotine-intro{display:grid;grid-template-columns:1.15fr 1fr;gap:22px}.nicotine-visual{padding:27px 29px;background:var(--peach);border-color:#eed8ce;display:flex;flex-direction:column;min-width:0}.nicotine-visual .section-code{color:#985641}.nicotine-visual .diagram-caption{font-size:12px;color:#845b4f;margin-top:auto;padding-top:12px;border-top:1px solid #e7c8bc}.mechanism-svg{width:100%;height:auto;margin:10px 0}.nicotine-info{padding:30px}.nicotine-info h3{font-size:29px;margin:12px 0 13px}.nicotine-info p{font-size:15px;color:var(--muted);line-height:1.7}.step-label{font-size:11px;font-weight:700;letter-spacing:.12em;color:#a25941;text-transform:uppercase}.step-nav{display:flex;gap:6px;margin-top:23px}.step-nav button{flex:1;min-width:0;min-height:40px;border-radius:9px;border:1px solid #e1dcd4;background:#fff;padding:5px;font-size:12px}.step-nav 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#211c4a3b}.source-dialog::backdrop{background:#2622337d;backdrop-filter:blur(3px)}.dialog-head{padding:25px 29px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:var(--paper);position:sticky;top:0;z-index:1}.dialog-head h2{font-size:27px}.dialog-head form{margin:0}.close-button{font-size:22px;width:38px;height:38px;border-radius:50%;background:#eeebe5;border:0}.dialog-body{padding:20px 29px 30px}.dialog-body>.intro{font-size:13px;color:var(--muted)}.sources{list-style:none;padding:0;margin:20px 0 0;counter-reset:source}.sources li{display:grid;grid-template-columns:27px 1fr;gap:12px;border-top:1px solid var(--line);padding:16px 8px;scroll-margin-top:100px;border-radius:8px;transition:background .2s}.sources li:before{counter-increment:source;content:counter(source,decimal-leading-zero);font-size:10px;font-weight:750;color:var(--purple-dark);padding-top:3px}.sources li.highlight{background:var(--lavender)}.sources a{font-size:14px;font-weight:600;line-height:1.4;display:block}.sources p{font-size:12px;color:var(--muted);margin-top:5px}.model-note{margin-top:23px;font-size:12px;color:var(--muted);padding:17px;background:#eeece6;border-radius:10px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 22px;background:#282735;color:white;border-radius:35px;font-size:13px;box-shadow:0 6px 20px #0002;z-index:20}.noscript{background:#fff0d8;border:1px solid #ddbc7b;padding:18px;border-radius:10px;margin:20px 0}
@keyframes enter{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}@keyframes signal{0%{opacity:0;r:5}20%{opacity:1;r:9}80%{opacity:.8}100%{opacity:0;r:15}}
@media(min-width:1450px){.hero{padding:46px 0 40px}.brain-svg{margin:0 -10px}}
@media(max-width:950px){.wrap{padding:0 24px}.hero{gap:25px}.hero-aside p{font-size:14px}.explorer{grid-template-columns:1.1fr 1fr;gap:16px}.info-surface{padding:24px}.info-surface h3{font-size:29px}.info-surface>div>p{font-size:14px}.brain-surface{padding:18px 13px}.region-buttons{gap:3px}.region-button{font-size:10px}.scenario-head{align-items:flex-start;flex-direction:column;gap:14px}.lab-grid{gap:16px;grid-template-columns:1fr 1fr}.network-surface{padding:23px 20px}.plastic-info{padding:24px}.nicotine-intro{gap:16px}.nicotine-info{padding:24px}.loop-copy{grid-template-columns:140px 1fr}.tab{gap:9px;font-size:12px}.tab span:first-child{width:24px;height:24px}}
@media(max-width:720px){.wrap{padding:0 19px}.topbar{height:76px}.brand{font-size:12px;gap:8px}.brand svg{width:34px;height:34px}.utility{gap:0}.download{font-size:11px;padding:8px 12px}.utility .plain-button{font-size:11px;padding:8px 11px}.hero{grid-template-columns:1fr;gap:17px;padding:30px 0 26px}.hero h1{font-size:clamp(37px,11vw,47px)}.eyebrow{font-size:9px}.hero-aside p{font-size:14px;max-width:480px;line-height:1.6}.hero-meta{margin-top:13px}.tabs{gap:0;margin-bottom:19px}.tab{padding:13px 2px 15px;gap:7px;flex-direction:column;font-size:10px;line-height:1.25}.tab span:first-child{height:23px;width:23px;font-size:9px}.lesson-heading{margin:24px 0 17px;display:block}.lesson-heading h2{font-size:28px}.lesson-heading p{margin-top:10px;font-size:13px;max-width:100%}.explorer,.lab-grid,.nicotine-intro{grid-template-columns:1fr;gap:15px}.brain-surface{padding:17px 14px}.brain-svg{max-width:580px;align-self:center;width:100%;margin:0}.region-button{font-size:11px;padding:12px 4px}.info-surface{padding:25px}.info-surface h3{font-size:30px}.info-surface>div>p{font-size:15px}.insight-strip{grid-template-columns:28px 1fr;gap:13px;padding:18px}.insight-strip .text-next{grid-column:2;text-align:left;padding:0}.insight-strip p{font-size:13px}.chapter-footer{margin:20px 0 29px}.chapter-footer .note{max-width:150px;font-size:10px}.primary{font-size:12px;padding:11px 16px;gap:12px}.control-card{grid-template-columns:1fr;gap:15px;padding:22px}.compare-grid{gap:12px}.compare-card{padding:20px 17px}.compare-top{align-items:flex-start;margin-bottom:14px;gap:3px}.compare-top h3{font-size:21px}.compare-icon{display:none}.compare-row p{font-size:12px}.compare-row h4{font-size:11px}.compare-row{margin-top:14px;padding-top:14px}.compare-top .section-code{font-size:8px;letter-spacing:.08em}.scenario{padding:22px}.scenario h3{font-size:22px}.segmented{width:100%;justify-content:space-between}.segmented button{font-size:10px;padding:8px 10px}.scenario-result{grid-template-columns:1fr;gap:12px}.scenario-result .quote{font-size:22px}.scenario-result p{font-size:13px}.network-surface{padding:24px}.network-svg{max-height:270px}.lab-feedback{min-height:0}.triad{grid-template-columns:1fr;gap:0;margin-top:18px}.triad article{padding:17px 5px;border-top-width:1px}.triad article .n{float:left;margin-top:3px;margin-right:12px}.triad h4{margin:0 0 7px}.triad p{margin-left:30px}.loop-panel{padding:23px}.loop-copy{grid-template-columns:1fr;gap:8px;padding:17px;min-height:160px}.loop-controls button{padding:9px 12px;font-size:11px}.risk-panel{grid-template-columns:1fr;gap:16px;padding:23px}.risk-title span{font-size:37px}.risk-title{display:flex;gap:17px;align-items:center}.risk-title p{max-width:180px;margin:0}.risk-panel ul{font-size:13px}.evidence-grid{grid-template-columns:1fr;gap:17px}.hope{padding:23px}.hope h3{font-size:23px}.hope p{font-size:13px}.footer{align-items:flex-start;gap:12px;font-size:10px}.footer-right{display:block;text-align:right}.footer-right button{display:block;margin-left:auto}.dialog-head{padding:20px}.dialog-body{padding:18px 20px}.source-dialog{max-height:90dvh}.step-actions .secondary{font-size:12px}.mechanism-svg{max-height:300px}}
@media(min-width:721px) and (max-width:850px){.explorer,.lab-grid,.nicotine-intro{grid-template-columns:1fr}.brain-svg{width:100%;max-width:600px;align-self:center}.network-svg{max-height:320px}}
@media(max-width:375px){.hero h1{font-size:41px}.download .download-label{display:none}.download{font-size:16px;min-width:37px;justify-content:center}.compare-card{padding:17px 13px}.compare-top h3{font-size:19px}.region-button{font-size:10px}.figure-top{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media print{body{background:#fff}.lesson[hidden]{display:block!important}.utility,.tabs,.chapter-footer,.step-actions,.lab-controls,.sources-button,.footer-right,.micro-buttons{display:none!important}.hero{padding-top:20px}.lesson{break-before:page}.surface{box-shadow:none}.source-dialog{display:none}.wrap{max-width:none}.lesson-heading{margin-top:20px}}

/* ADHD, evidence, and practical choices */
select:focus-visible{outline:3px solid var(--purple);outline-offset:4px}
.tabs{grid-template-columns:repeat(6,minmax(0,1fr))}.tab{gap:8px;padding-left:6px;padding-right:6px;font-size:12px}
.adhd-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:21px}.adhd-definition{padding:29px 31px}.adhd-definition h3{font-size:29px;margin-bottom:17px}.adhd-definition p{font-size:14px;color:var(--muted);line-height:1.75}.adhd-definition .small-reassurance{padding-top:17px;margin-top:17px;border-top:1px solid var(--line);color:var(--ink)}
.study-card{padding:28px 30px;background:var(--lavender);border-color:#ded5f0}.study-number{display:block;font-size:61px;letter-spacing:-.065em;font-weight:650;line-height:1.12;color:var(--purple-dark);margin:14px 0 5px}.study-population{font-size:12px;color:#6b5b87;line-height:1.55}.study-card h3{font-size:24px;margin:22px 0 12px}.study-card>p:last-child{font-size:14px;color:#665c79;line-height:1.7}.study-card .cite{vertical-align:baseline}
.adhd-explorer{padding:27px 29px;margin-top:22px}.adhd-explorer h3{font-size:25px}.adhd-explorer>.lead{font-size:14px;color:var(--muted);margin-top:10px}.adhd-controls{display:flex;gap:7px;flex-wrap:wrap;margin-top:19px}.adhd-controls button{border:1px solid #dad4e6;border-radius:28px;padding:10px 15px;background:#fff;font-size:12px}.adhd-controls button[aria-pressed=true]{background:var(--purple);border-color:var(--purple);color:#fff}.adhd-response{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin-top:19px}.adhd-response>div{padding:20px 22px;border-radius:14px;background:#f8f5fb}.adhd-response>div:last-child{background:var(--mint)}.adhd-response h4{font-size:17px;letter-spacing:-.02em;line-height:1.35;margin:0 0 9px}.adhd-response p{font-size:14px;line-height:1.7;color:#645e70}.adhd-response>div:last-child p{color:#4d6455}.evidence-note{padding:18px 22px;border-left:3px solid #c4b5df;margin-top:19px;color:var(--muted);font-size:13px;line-height:1.7}.evidence-note strong{color:var(--ink)}
.recommendation{display:grid;grid-template-columns:1.15fr 1fr;gap:35px;background:#2f2b3f;color:#fff;border-radius:22px;padding:35px 36px}.recommendation .section-code{color:#c3b4ec}.recommendation h2{font-size:clamp(32px,4vw,48px);line-height:1.12}.recommendation h2 em{font-style:normal;color:#cbb8f5}.recommendation .recommendation-line{margin-top:17px;color:#ded5ee;font-size:16px;line-height:1.55}.recommendation-copy{align-self:center}.recommendation-copy p{font-size:14px;color:#e2dce9;line-height:1.75}.recommendation-copy strong{color:#fff}.recommendation .cite{color:#d6c7f9}.recommendation .cite:hover{background:#514563}
.section-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin:28px 0 17px}.section-intro h3{font-size:27px}.section-intro>p{font-size:12px;color:var(--muted);max-width:360px}.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.stat-card{padding:26px 29px}.stat-card .section-code{margin-bottom:14px}.stat-value{font-size:56px;font-weight:650;line-height:1.1;letter-spacing:-.06em;color:#985b46}.stat-card:nth-child(2) .stat-value{color:var(--purple-dark)}.stat-card h4{font-size:19px;line-height:1.35;letter-spacing:-.025em;margin:12px 0 10px}.stat-card>p{font-size:13px;color:var(--muted);line-height:1.7}.stat-card .stat-denominator{font-size:11px;border-top:1px solid var(--line);padding-top:12px;margin-top:15px}.stats-caption{font-size:12px;color:var(--muted);margin-top:13px;line-height:1.6}
.peer-panel{padding:29px 31px;margin-top:24px}.peer-panel h3{font-size:29px}.peer-intro{font-size:14px;color:var(--muted);max-width:790px;margin-top:12px}.pressure-controls{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin-top:23px}.pressure-controls button{border:1px solid #dcd5e9;border-radius:11px;background:#fff;font-size:12px;padding:12px 8px;min-height:46px}.pressure-controls button[aria-pressed=true]{background:var(--lavender);color:var(--purple-dark);border-color:#b6a6db}.pressure-scene{display:grid;grid-template-columns:.8fr 1.2fr;gap:30px;margin-top:22px;padding:24px;background:#f8f6fb;border-radius:15px}.pressure-label{font-size:10px;font-weight:750;letter-spacing:.12em;text-transform:uppercase;color:#7e718f;display:block;margin-bottom:8px}.pressure-scene blockquote{margin:0;font-size:21px;line-height:1.45;letter-spacing:-.02em}.pressure-scene .your-reply{color:var(--purple-dark);font-weight:600}.pressure-scene p{font-size:13px;color:var(--muted);line-height:1.7;margin-top:12px}.peer-reminder{margin-top:17px;font-size:12px;color:var(--muted)}
.norm-card{display:grid;grid-template-columns:130px 1fr;align-items:center;gap:22px;padding:22px 25px;background:var(--mint);border:1px solid #d6e5da;border-radius:16px;margin-top:20px}.norm-stat{font-size:46px;letter-spacing:-.06em;font-weight:650;color:var(--teal);line-height:1.1}.norm-stat small{display:block;font-size:10px;font-weight:600;letter-spacing:.04em;line-height:1.5;margin-top:7px}.norm-card h4{margin:0 0 7px;font-size:18px;letter-spacing:-.02em;line-height:1.35}.norm-card p{font-size:13px;color:#4c6657;line-height:1.65}.norm-card .norm-method{font-size:11px;margin-top:8px}
.pressure-tips{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}.pressure-tips article{border-top:2px solid #d3c9e5;padding:19px 4px}.pressure-tips .section-code{color:var(--purple-dark)}.pressure-tips h4{font-size:17px;letter-spacing:-.02em;line-height:1.35;margin:0 0 10px}.pressure-tips p{font-size:13px;color:var(--muted);line-height:1.75}
.plan-builder{padding:28px 30px;margin-top:7px}.plan-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px}.plan-head h3{font-size:26px}.plan-head p{font-size:12px;color:var(--muted);max-width:350px}.plan-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:23px}.plan-field label{display:block;font-size:12px;font-weight:650;margin-bottom:8px}.plan-field select{background:#faf9fc;border:1px solid #dcd6e7;border-radius:10px;padding:12px 30px 12px 12px;width:100%;min-height:46px;font-size:12px;color:var(--ink);text-overflow:ellipsis}.plan-output{padding:20px 23px;background:var(--lavender);border-radius:13px;margin-top:21px}.plan-output .section-code{color:var(--purple-dark)}.plan-output p{font-size:14px;line-height:1.75;color:#56486b}.plan-output p+p{margin-top:7px}.plan-output strong{color:#3f3156}.plan-note{margin-top:11px;font-size:11px;color:var(--muted)}
@media(max-width:950px){.tab{font-size:11px;gap:5px}.tab span:first-child{width:22px;height:22px;flex:0 0 22px}.recommendation{gap:25px;padding:30px}.adhd-definition,.study-card{padding:26px}.pressure-scene{gap:23px}.plan-controls{gap:10px}.plan-field select{font-size:11px}}
@media(max-width:720px){.tabs{grid-template-columns:repeat(3,minmax(0,1fr))}.tab{font-size:11px;flex-direction:row;padding:13px 3px;min-height:51px;gap:6px}.tab:nth-child(-n+3){border-bottom:1px solid var(--line)}.adhd-grid,.adhd-response,.recommendation,.stat-grid,.pressure-scene,.pressure-tips,.plan-controls{grid-template-columns:1fr}.adhd-grid{gap:15px}.study-number{font-size:53px}.adhd-definition,.study-card,.adhd-explorer,.peer-panel,.plan-builder{padding:23px}.adhd-definition h3{font-size:26px}.adhd-response{gap:12px}.adhd-response>div{padding:19px}.adhd-controls{gap:6px}.adhd-controls button{font-size:11px;padding:10px 12px}.recommendation{padding:28px 25px;gap:22px}.recommendation h2{font-size:36px}.recommendation .recommendation-line{font-size:15px}.section-intro{display:block;margin-top:25px}.section-intro h3{font-size:25px}.section-intro>p{margin-top:10px}.stat-grid{gap:14px}.stat-card{padding:23px}.stat-value{font-size:50px}.stat-card h4{font-size:18px}.pressure-controls{grid-template-columns:repeat(2,1fr);gap:7px;margin-top:20px}.pressure-controls button{font-size:11px}.peer-panel h3{font-size:26px}.pressure-scene{padding:21px;gap:23px}.pressure-scene blockquote{font-size:21px}.norm-card{grid-template-columns:1fr;gap:14px;padding:23px}.norm-stat{font-size:43px}.norm-stat small{display:inline-block;margin:0 0 0 12px;vertical-align:middle;max-width:150px}.pressure-tips{gap:0;margin-top:23px}.pressure-tips article{padding:18px 4px;border-top-width:1px}.plan-head{display:block}.plan-head p{margin-top:10px}.plan-controls{gap:16px;margin-top:20px}.plan-field select{font-size:13px}.plan-output{padding:18px}.plan-output p{font-size:13px}.evidence-note{padding:16px 19px;font-size:12px}}
@media print{.adhd-controls,.pressure-controls,.plan-controls{display:none}.recommendation{background:#eeeaf9;color:#282735}.recommendation h2 em,.recommendation .section-code,.recommendation-copy p,.recommendation-copy strong,.recommendation .recommendation-line{color:#282735}.pressure-tips{grid-template-columns:repeat(3,1fr)}}