:root{--paper:#f8f7f2;--surface:#fffefb;--ink:#223730;--muted:#56665e;--green:#173e35;--line:#d9dfd6;--gold:#bf934c;--mono:ui-monospace,SFMono-Regular,Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--green);text-underline-offset:4px}a:hover{color:#47705b}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #be8940;outline-offset:5px}h1,h2,h3,p{margin-top:0}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;letter-spacing:-.035em}h2{font-size:clamp(30px,3.1vw,42px);line-height:1.2;margin-bottom:24px}h3{font-size:18px;line-height:1.4;margin-bottom:10px}p{margin-bottom:20px}code,pre{font-family:var(--mono)}:not(pre)>code{font-size:.86em;background:#e9ede5;padding:2px 5px;border-radius:3px;overflow-wrap:anywhere}.site-header{max-width:1320px;padding:25px 40px;margin:auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.wordmark{font-weight:650;letter-spacing:-.04em;font-size:23px;text-decoration:none;display:flex;align-items:center;gap:12px}.mark{width:33px;height:33px;background:var(--green);color:var(--paper);display:inline-flex;align-items:center;justify-content:center;font-family:Georgia,serif;font-size:23px;position:relative;border-radius:5px}.mark span{font-family:var(--mono);font-size:16px;position:absolute;right:-4px;top:-10px;color:var(--gold)}.site-header nav{display:flex;gap:28px}.site-header nav a{font-size:14px;text-decoration:none}.hero{max-width:1240px;margin:auto;padding:88px 0 85px;display:grid;grid-template-columns:1.45fr 1fr;gap:85px;align-items:center}.eyebrow{font:11px/1.5 var(--mono);text-transform:uppercase;letter-spacing:.13em;color:var(--muted);margin-bottom:18px}h1{font-size:clamp(45px,5.6vw,72px);line-height:1.1;margin:0 0 24px}h1 em{color:#486b53;font-weight:400}.lead{font-size:19px;line-height:1.75;max-width:610px;color:var(--muted)}.actions{display:flex;gap:24px;align-items:center;margin:32px 0 24px}.button{display:inline-flex;gap:28px;padding:13px 22px;background:var(--green);color:white;border-radius:5px;font-size:14px;text-decoration:none}.button:hover{background:#295947;color:white}.text-link{font-size:14px}.meta{font:11px/1.6 var(--mono);color:var(--muted)}.meta span{padding:0 8px}.forecast-card{background:var(--surface);border:1px solid #c9d4c8;border-radius:10px;box-shadow:12px 14px 0 #e9ecdf;padding:28px}.card-top{display:flex;justify-content:space-between;align-items:center}.card-top .eyebrow{margin:0}.badge{font:10px var(--mono);border:1px solid var(--line);border-radius:20px;padding:5px 9px;color:var(--muted)}.forecast-question{font-size:21px;line-height:1.45;margin:26px 0 12px}.forecast-value{font-family:Georgia,serif;font-size:85px;line-height:1.1;letter-spacing:-5px}.forecast-value>span{font-size:34px;letter-spacing:-1px;margin-left:5px}.probability-track{background:#ebeee5;height:8px;border-radius:4px;margin:20px 0 28px;overflow:hidden}.probability-track>div{width:75%;height:100%;background:var(--green)}.record-list{margin:0;font-size:12px}.record-list>div{display:flex;justify-content:space-between;padding:10px 0;border-top:1px solid var(--line);gap:12px}.record-list dt{color:var(--muted)}.record-list dd{margin:0;font-family:var(--mono);font-size:11px}.card-footer{border-top:1px solid var(--line);margin-top:6px;padding-top:18px;font-size:11px;color:var(--muted)}.status-dot{display:inline-block;width:6px;height:6px;background:#638060;border-radius:50%;margin-right:7px}.content-layout{border-top:1px solid var(--line);display:grid;grid-template-columns:235px minmax(0,860px);gap:76px;max-width:1240px;margin:auto;padding-top:55px}.sidebar{position:sticky;top:30px;align-self:start}.sidebar nav{display:flex;flex-direction:column;gap:5px;border-left:1px solid var(--line);padding-left:18px}.sidebar .eyebrow{margin:0 0 11px}.sidebar nav a{font-size:13px;text-decoration:none;padding:4px 0;color:var(--muted)}.sidebar nav a:hover,.sidebar nav a.active{color:var(--green);font-weight:600}.sidebar-note{font-family:Georgia,serif;font-style:italic;margin:48px 0 0 18px;color:var(--muted)}.sidebar-note span{font:11px var(--mono);font-style:normal}.content{min-width:0}.section{padding:0 0 65px;margin-bottom:60px;border-bottom:1px solid var(--line);scroll-margin-top:20px}.section>.eyebrow{color:#69826a}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:30px 0}.feature-grid article{padding:23px;background:#f0f2e9;border:1px solid var(--line);border-radius:5px}.feature-grid p{font-size:14px;line-height:1.75;margin:0;color:var(--muted)}.feature-number{font:11px var(--mono);color:#76846e;display:block;margin-bottom:12px}.note{padding:20px 24px;border-left:3px solid var(--gold);background:#f0eddf;font-size:14px;margin:25px 0}.code-block{border:1px solid #2c4c41;background:#19372e;border-radius:6px;overflow:hidden;margin:25px 0}.code-heading{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #385247;padding:11px 20px;color:#bdcdbf;font:11px var(--mono);gap:12px}.copy{font:11px var(--mono);color:#ecf1e9;background:transparent;border:1px solid #617b69;border-radius:4px;padding:4px 10px;min-height:30px}.copy:hover{background:#385247}.code-block pre{color:#e3ebdf;margin:0;padding:23px 24px;overflow:auto;font-size:12px;line-height:1.95;tab-size:2;white-space:pre}.caption{font-size:12px;color:var(--muted);line-height:1.7}details{margin:22px 0;border:1px solid var(--line);background:var(--surface);border-radius:5px}summary{cursor:pointer;padding:15px 20px;font-size:14px;font-weight:600}.details-body{padding:6px 20px 20px;font-size:14px}.details-body pre{padding:20px;background:#edf0e6;font-size:12px;overflow:auto;line-height:1.8}.workflow{list-style:none;margin:30px 0;padding:0;counter-reset:step}.workflow li{display:grid;grid-template-columns:32px 125px 1fr;gap:15px;padding:14px 0;border-bottom:1px solid var(--line);font-size:14px;align-items:baseline}.workflow li::before{counter-increment:step;content:counter(step,decimal-leading-zero);font:11px var(--mono);color:#789076}.workflow li span{color:var(--muted)}.table-scroll{overflow:auto;margin:28px 0}table{border-collapse:collapse;text-align:left;width:100%;font-size:14px}caption{text-align:left;font:11px var(--mono);color:var(--muted);padding-bottom:15px}th{font:11px var(--mono);text-transform:uppercase;letter-spacing:.06em;background:#ecefe5}td,th{padding:15px 17px;border-bottom:1px solid var(--line);vertical-align:top}td:first-child{width:30%;font-weight:550}.scenario-lab{background:var(--surface);border:1px solid #b9c9b6;border-radius:7px;overflow:hidden;margin:30px 0 18px}.lab-header{display:flex;justify-content:space-between;align-items:center;padding:17px 25px;border-bottom:1px solid var(--line)}.lab-header .eyebrow{margin:0}.reset{background:transparent;border:0;text-decoration:underline;text-underline-offset:4px;font-size:12px;color:var(--muted);padding:5px}.scenario-controls{padding:28px 25px 10px;display:grid;gap:22px}.scenario-controls label{display:flex;justify-content:space-between;gap:18px;font-size:14px}.scenario-controls output{font-family:var(--mono);font-weight:600}.scenario-controls input{width:100%;accent-color:var(--green);margin:13px 0 0;cursor:pointer}.scenario-result{margin-top:20px;padding:26px;background:#eef2e8;border-top:1px solid var(--line)}.scenario-result>div:first-child{display:flex;justify-content:space-between;align-items:center;gap:12px}.scenario-result .eyebrow{margin:0}.scenario-result>p:first-of-type{font:12px var(--mono);color:var(--muted);margin:10px 0 20px}#scenario-total{font:48px Georgia,serif;letter-spacing:-2px}.mixture-bar{height:18px;display:flex;background:#d8dfd2;overflow:hidden;border-radius:3px}.mixture-bar span:first-child{background:var(--green)}.mixture-bar span:last-child{background:var(--gold)}.scenario-result .caption{margin:12px 0 0}.resource-links{display:flex;flex-direction:column;margin-top:28px;border-top:1px solid var(--line)}.resource-links a{padding:14px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;text-decoration:none;font-size:14px}.example-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.example-grid>a{border:1px solid var(--line);border-radius:5px;background:var(--surface);padding:25px;text-decoration:none}.example-grid>a:hover{border-color:#859d81;background:#f0f3e9}.example-grid .eyebrow{display:block;font-size:9px}.example-grid h3{font-size:18px}.example-grid h3 span{font-size:15px}.example-grid p{font-size:13px;color:var(--muted);margin:0}.example-grid+.caption{margin-top:20px}footer{max-width:1240px;margin:0 auto;padding:0 0 45px;display:flex;flex-wrap:wrap;align-items:center;gap:25px;font-size:12px;color:var(--muted)}footer .wordmark{font-size:20px}footer p{margin:0}footer>div{margin-left:auto;display:flex;gap:24px}.skip{position:absolute;left:15px;top:-80px;background:var(--green);color:white;padding:8px 15px;z-index:5}.skip:focus{top:10px}.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}
@media(min-width:1450px){.hero{padding-top:105px;padding-bottom:100px}}
@media(max-width:1320px){.hero,.content-layout,footer{margin-left:40px;margin-right:40px}.hero{gap:50px}.content-layout{gap:48px;grid-template-columns:200px minmax(0,1fr)}}
@media(max-width:960px){.hero{gap:30px;grid-template-columns:1.2fr 1fr;padding-top:60px}.lead{font-size:17px}.forecast-card{padding:23px}.forecast-question{font-size:18px}.content-layout{display:block}.sidebar{display:none}h1{font-size:49px}.meta span{padding:0 3px}.hero .actions{flex-wrap:wrap;gap:15px}}
@media(max-width:680px){.site-header{padding:20px}.site-header nav{gap:16px}.site-header nav a{font-size:12px}.site-header nav a:nth-child(2){display:none}.wordmark{font-size:20px;gap:9px}.hero,.content-layout,footer{margin-left:22px;margin-right:22px}.hero{display:block;padding:50px 0}.hero h1{font-size:48px}.hero .lead{font-size:17px}.forecast-card{margin-top:37px;max-width:440px;box-shadow:6px 7px 0 #e9ecdf}.forecast-value{font-size:69px}.forecast-question br{display:none}.content-layout{padding-top:40px}.section{margin-bottom:42px;padding-bottom:42px}.feature-grid,.example-grid{grid-template-columns:1fr;gap:14px}.feature-grid article{padding:20px}.workflow li{grid-template-columns:25px 1fr;gap:8px 12px}.workflow li span{grid-column:2}.code-block pre{padding:18px;font-size:11px}.code-heading{padding:10px 16px}.scenario-controls,.scenario-result{padding:22px 18px}.lab-header{padding:15px 18px}.scenario-controls label{font-size:13px}#scenario-total{font-size:40px}.scenario-result .eyebrow{max-width:180px}.note{padding:18px;font-size:13px}footer{display:block;padding-bottom:35px}footer p{margin:12px 0}footer>div{gap:20px}.record-list dd{font-size:10px}td,th{padding:12px;font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{background:white}.sidebar,.site-header nav,.copy,.reset,.actions{display:none}.hero,.content-layout,footer{display:block;margin:0;padding:20px}.forecast-card{box-shadow:none;max-width:420px}.section{break-inside:avoid}.code-block{background:#eee;color:black}.code-block pre,.code-heading{color:black}.details-body{display:block}a{color:black}}

/* Long walkthroughs keep navigation and code usable at every viewport. */
.sidebar nav{max-height:calc(100vh - 180px);overflow-y:auto}
.code-heading{gap:12px}
.code-heading .copy{flex-shrink:0}
@media(max-width:680px){.code-heading span{font-size:10px;line-height:1.5}.card-footer{font-size:10px}}

/* Executed study tutorial. */
.study-tutorial .hero{grid-template-columns:1.5fr 1fr;gap:70px}
.result-preview{margin:0;padding:28px 0 10px;border-top:2px solid var(--green);border-bottom:1px solid var(--line)}
.preview-question{font:27px/1.35 Georgia,serif;margin:20px 0 30px}
.preview-row{display:grid;grid-template-columns:50px 1fr 45px;gap:15px;align-items:center;margin:20px 0;font:13px var(--mono)}
.preview-track{height:10px;background:#e3e8dc}.preview-track span{display:block;height:100%;background:var(--green)}
.preview-row:nth-of-type(2) .preview-track span{background:#739064}
.preview-score{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding:18px 0;font:12px var(--mono)}
.result-preview>.caption{margin:24px 0 12px}
.study-tutorial .code-block{margin-bottom:0}
.study-tutorial .command-output{margin-top:0;border-top:0;border-radius:0 0 5px 5px}
.study-tutorial .command-output summary{font-size:12px;font-weight:400;padding:11px 20px}
.study-tutorial .details-body .code-block pre{background:#19372e}
.study-tutorial .details-body>pre{max-height:480px}
.study-tutorial .details-body .code-block{margin-bottom:20px}
.trace-view,.score-lab{border-top:2px solid var(--green);border-bottom:1px solid var(--line);padding:25px 0;margin:35px 0 20px}
.trace-view label,.score-lab label{display:block;font-size:13px;margin-bottom:8px}
.trace-view select,.score-lab select{font:inherit;font-size:14px;background:var(--surface);color:var(--ink);border:1px solid #8a9c8a;border-radius:4px;padding:10px;max-width:100%;min-height:44px}
select:focus-visible{outline:3px solid #be8940;outline-offset:4px}
#trace-explanation{margin:20px 0;font-size:14px;min-height:48px}
#trace-payload{background:#edf0e6;padding:20px;max-height:330px;overflow:auto;font:12px/1.8 var(--mono)}
.score-lab .table-scroll{margin-bottom:18px}.score-lab>p:last-child{font-size:14px;margin-bottom:0}
.study-tutorial .site-footer{max-width:1240px;margin:auto;display:flex;justify-content:space-between;gap:20px;padding:25px 0 45px;font-size:12px}
@media(max-width:1100px){.study-tutorial .hero{gap:40px}.study-tutorial .site-footer{margin:0 30px}}
@media(max-width:850px){.study-tutorial .hero{grid-template-columns:1fr}.result-preview{max-width:600px;width:100%}.study-tutorial .sidebar nav{max-height:none;flex-direction:row;flex-wrap:wrap;gap:4px 18px}.study-tutorial .sidebar .eyebrow{width:100%}.study-tutorial .sidebar-note{display:none}}
@media(max-width:680px){.study-tutorial .site-header{gap:18px}.study-tutorial .site-header nav{gap:12px}.study-tutorial .site-header nav a{font-size:11px}.study-tutorial .actions{flex-wrap:wrap;gap:16px}.study-tutorial .site-footer{flex-direction:column}.preview-score{font-size:11px}.study-tutorial .content-layout{padding-top:25px}.study-tutorial .section{padding-bottom:40px;margin-bottom:40px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

@media(max-width:960px){.study-tutorial .sidebar{display:block;position:static;margin-bottom:40px}.study-tutorial .sidebar nav{max-height:none;flex-direction:row;flex-wrap:wrap;gap:4px 18px}.study-tutorial .sidebar .eyebrow{width:100%}.study-tutorial .sidebar-note{display:none}}