:root{--bg:#f4f5f0;--paper:#fff;--ink:#192c29;--muted:#687870;--line:#dee5dd;--green:#123e38;--mint:#dcece5;--lime:#dcf485;--blue:#7963b7;--red:#a94636;--amber:#956320;--soft:#f8faf7;--radius:18px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);font-size:14px;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,select{font:inherit}button,a,input,select,summary{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}a{color:var(--green)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #9bc94d;outline-offset:3px}.topbar{height:85px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:36px;padding:0 max(28px,calc((100vw - 1360px)/2));background:#fff}.brand{display:flex;align-items:center;gap:10px;font-size:28px;font-weight:780;text-decoration:none;letter-spacing:-1px}.brandmark{background:var(--green);color:#fff;font-size:18px;letter-spacing:-1px;width:45px;height:45px;border-radius:12px;display:grid;place-items:center}.branddot{color:#8daa40}.tagline{font-size:12px;color:var(--muted)}.top-actions{margin-left:auto;display:flex;align-items:center;gap:10px}.private{display:flex;gap:7px;align-items:center;margin-right:16px;color:var(--muted);font-size:12px}.private i{width:6px;height:6px;border-radius:50%;background:#568767}.iconbtn{background:#fff;border:1px solid var(--line);padding:10px 14px;border-radius:8px;color:var(--ink);font-size:12px;font-weight:600}main{max-width:1360px;margin:auto;padding:0 28px}.intro{display:flex;align-items:center;justify-content:space-between;padding:46px 0 35px}.eyebrow,.note-label{font-size:10px;font-weight:750;letter-spacing:1.8px;color:var(--muted)}h1{font-weight:550;font-size:43px;line-height:1.14;letter-spacing:-1.6px;margin:15px 0}h1 em{font-style:normal;color:#47745e}.intro p{color:var(--muted);font-size:14px;line-height:1.6}.intro-note{border-left:1px solid #ccd8cd;padding:4px 6px 4px 28px;min-width:240px}.intro-note p{font-size:13px;line-height:2.1;margin:10px 0}.intro-note b{color:#7f985e;margin-right:15px;font-size:10px}.note-bottom{font-size:11px;color:var(--muted)}.tabs{display:flex;gap:5px;border-bottom:1px solid var(--line);margin-bottom:27px;overflow:auto;scrollbar-width:thin}.tabs button{border:0;background:transparent;color:#7b8a7f;display:flex;align-items:center;gap:12px;font-size:10px;padding:17px 20px 18px;white-space:nowrap;border-bottom:3px solid transparent}.tabs button span{font-size:13px;font-weight:650;color:#66756c}.tabs button.active{border-bottom-color:var(--green);color:var(--green)}.tabs button.active span{color:var(--green)}.work-grid{display:grid;grid-template-columns:355px minmax(0,1fr);gap:24px;align-items:start}.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px}.panel+.panel{margin-top:18px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:21px}h2{font-size:18px;font-weight:650;letter-spacing:-.3px;margin:0}h3{font-size:14px;line-height:1.5;font-weight:650;margin:0 0 15px}.step{font-size:10px;color:#78867c;border:1px solid var(--line);border-radius:20px;padding:5px 9px}.hint{font-size:11px;line-height:1.6;color:var(--muted);margin:7px 0 16px}.field{display:block;margin:0 0 16px}.field>span,.field-label{font-size:12px;font-weight:600;display:block;margin-bottom:7px;line-height:1.5}.input-wrap{position:relative}.input-wrap input{width:100%;padding:12px 42px 12px 13px;background:#fcfdfb;border:1px solid #d5ddd4;border-radius:9px;font-size:15px;color:var(--ink);font-variant-numeric:tabular-nums;min-width:0}.input-wrap .unit{position:absolute;right:13px;top:13px;color:#89958b;font-size:12px;pointer-events:none}.input-wrap input:focus{border-color:#43866b;background:#fff;outline:2px solid #dcece5}.field small{display:block;color:var(--muted);font-size:10.5px;line-height:1.5;margin-top:6px}select{width:100%;padding:12px 9px;border:1px solid #d5ddd4;border-radius:9px;background:#fcfdfb;color:var(--ink);font-size:12px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.segmented{display:flex;background:#f1f4ef;padding:4px;border-radius:10px;gap:3px;margin-bottom:22px}.segmented button{flex:1;border:0;background:transparent;border-radius:7px;padding:9px 7px;color:#6b7c71;font-size:11px;font-weight:600}.segmented .on{background:#fff;box-shadow:0 1px 3px #19352b14;color:var(--green)}.primary{background:var(--green);border:0;border-radius:10px;color:#fff;padding:14px 18px;font-weight:650;width:100%;font-size:13px;display:flex;align-items:center;justify-content:space-between;gap:12px}.primary:hover{background:#215449}.secondary{border:1px solid var(--line);background:var(--soft);color:var(--green);border-radius:9px;padding:11px 15px;font-size:12px}.textbtn{border:0;background:none;font-size:12px;color:var(--green);padding:10px 0}.calc-note{font-size:10px;color:var(--muted);text-align:center;margin:10px 0 0}.divider{height:1px;background:var(--line);margin:20px 0}details{border-top:1px solid var(--line);margin-top:18px;padding-top:14px}summary{cursor:pointer;font-size:12px;font-weight:600;list-style-position:outside;margin-left:13px}details[open] summary{margin-bottom:18px}.results{min-width:0}.result-title{display:flex;justify-content:space-between;align-items:center;margin:2px 0 15px;gap:10px}.result-title h2{font-size:16px}.badge{font-size:10px;font-weight:650;border-radius:6px;padding:6px 9px;background:#e7eee4;color:#507148;white-space:nowrap}.badge.demo{background:#edf0eb;color:#7a8679}.hero-card{background:var(--green);color:#fff;padding:29px;border-radius:var(--radius);position:relative;overflow:hidden;margin-bottom:18px}.hero-card:after{content:'';position:absolute;right:-68px;top:-106px;width:295px;height:295px;border:1px solid #ffffff10;border-radius:50%;pointer-events:none}.hero-card .hero-label{font-size:12px;color:#b6cdc0}.hero-number{font-size:48px;font-weight:550;letter-spacing:-1.8px;margin:10px 0;line-height:1.1;font-variant-numeric:tabular-nums}.hero-number small{font-size:16px;color:#bcd1c6;letter-spacing:0;margin-left:8px}.hero-card p{font-size:12px;color:#c7d8cd;line-height:1.7;margin:10px 0 0;max-width:560px}.hero-chip{display:inline-block;background:var(--lime);color:#26442d;border-radius:6px;padding:6px 9px;font-size:10px;font-weight:700;margin-bottom:16px}.hero-card.neutral{background:#435b50}.hero-card.danger{background:#713d35}.kpis{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin:18px 0}.kpi{background:#fff;border:1px solid var(--line);border-radius:13px;padding:17px}.kpi-label{font-size:10.5px;color:var(--muted);line-height:1.5}.kpi-value{font-size:24px;font-weight:600;letter-spacing:-.65px;margin:9px 0;line-height:1.25;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.kpi-note{font-size:10px;color:#7c897d;line-height:1.5}.chart-panel{padding:23px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:18px}.chart-head{display:flex;align-items:center;justify-content:space-between;gap:15px}.legend{display:flex;gap:15px;font-size:10px;color:var(--muted)}.legend span:before{content:'';display:inline-block;width:7px;height:7px;margin-right:6px;border-radius:50%;background:#3f886b}.legend span.b:before{background:var(--blue)}svg.chart{width:100%;height:auto;display:block;overflow:visible}svg text{font-family:inherit;fill:#7b877e;font-size:10px}svg .grid{stroke:#edf0e9;stroke-width:1}svg .tick{stroke:#c7d0c5;stroke-width:1}.chart-caption{font-size:10px;line-height:1.6;color:var(--muted);margin-top:8px}.info,.warning,.error,.success{padding:13px 16px;border:1px solid #d8e3d6;background:#edf4eb;border-radius:10px;color:#50664f;font-size:11px;line-height:1.65;margin:12px 0}.warning{background:#fcf4e6;border-color:#ecdfc5;color:#86632e}.error{background:#fff0ec;border-color:#ecc7be;color:#9b4433}.success{background:#e6f2eb;color:#365b45}.info b,.warning b,.error b{font-weight:700}.small-table{width:100%;border-collapse:collapse;font-size:11px;line-height:1.55;font-variant-numeric:tabular-nums}.small-table th{text-align:left;color:#7b887e;font-weight:500;font-size:10px;padding:10px 9px;border-bottom:1px solid var(--line)}.small-table td{padding:12px 9px;border-bottom:1px solid #edf1e9}.small-table td.num,.small-table th.num{text-align:right}.small-table tr:last-child td{border-bottom:0}.table-scroll{overflow:auto}.group-heading{display:flex;gap:8px;align-items:center;margin:0 0 13px;font-size:12px;font-weight:650}.letter{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;background:#e4eee6;color:#376d4c;font-size:11px}.letter.b{background:#eeebf7;color:#7362a7}.group{border-bottom:1px solid var(--line);padding:0 0 2px;margin-bottom:20px}.group .field>span{font-size:10.5px}.group .input-wrap input{font-size:14px}.group .field{margin-bottom:13px}.group .remove{margin-left:auto;border:0;background:none;color:#925d50;font-size:11px}.add{width:100%;border:1px dashed #bdcdbd;background:#f5f8f1;color:#607454;padding:12px;border-radius:9px;font-size:12px}.metricline{display:flex;justify-content:space-between;gap:20px;padding:11px 0;border-bottom:1px solid #edf0e8;font-size:11px}.metricline span{color:var(--muted)}.metricline b{font-weight:600;text-align:right}.metricline:last-child{border-bottom:0}.result-columns{display:grid;grid-template-columns:1fr 1fr;gap:18px}.result-columns .panel{margin:0}.prob-bar{display:flex;height:16px;background:#ebedf0;border-radius:8px;overflow:hidden;margin:21px 0 12px}.prob-bar .a{background:#527d65}.prob-bar .b{background:#a495c9}.prob-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}.dirty-box{padding:13px;background:#fff1d9;border:1px solid #e3d1a9;border-radius:10px;font-size:12px;margin-bottom:15px}.stale{opacity:.45;pointer-events:none}.method-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.method-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:27px}.method-card p,.method-card li{font-size:12px;line-height:1.8;color:var(--muted)}.method-card code{display:block;font-family:ui-monospace,monospace;font-size:11px;line-height:1.8;background:#f4f7f1;padding:13px;white-space:pre-wrap;overflow-wrap:anywhere;border-radius:8px;color:#34513e}.source-links{line-height:2;font-size:12px}.source-links a{display:block}.check{display:flex;gap:9px;font-size:11px;line-height:1.7;color:var(--muted);margin:8px 0}.check:before{content:'✓';color:#648d59}.full{grid-column:1/-1}footer{border-top:1px solid var(--line);padding:27px 0;margin-top:35px;display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between;color:#83907f;font-size:10px}footer div{display:flex;gap:15px}footer button{border:0;padding:0;background:none;color:#62705e;font-size:10px}footer a{font-size:10px;color:#62705e}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#203d31;color:white;padding:13px 22px;border-radius:10px;box-shadow:0 8px 24px #19392d25;font-size:12px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:9;max-width:90vw}#toast.show{opacity:1}dialog{border:1px solid var(--line);border-radius:18px;padding:30px;max-width:430px;background:#fff;color:var(--ink)}dialog::backdrop{background:#10291e66;backdrop-filter:blur(3px)}dialog p{color:var(--muted);line-height:1.7;font-size:12px}dialog button{margin:9px 0;width:100%}.skip{position:absolute;left:-999px;top:0}.skip:focus{left:15px;z-index:20;background:white;padding:14px} .loading{padding:60px 25px;text-align:center;color:var(--muted)}.spinner{display:block;width:26px;height:26px;border:3px solid #dce8d8;border-top-color:var(--green);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 18px}@keyframes spin{to{transform:rotate(360deg)}}.method-page{max-width:900px;padding-bottom:60px}.method-page h1{font-size:38px}.method-page h2{margin:35px 0 12px}.method-page p,.method-page li{line-height:1.8;color:#4e6054}.method-page pre{background:white;padding:20px;border:1px solid var(--line);border-radius:12px;overflow:auto;font-size:12px}.method-page a{overflow-wrap:anywhere}.method-page table{border-collapse:collapse;width:100%;font-size:12px}.method-page th,.method-page td{padding:12px;border:1px solid var(--line);text-align:left}
@media(max-width:1100px){.topbar{padding:0 24px}.tagline{display:none}.work-grid{grid-template-columns:320px minmax(0,1fr);gap:18px}.panel{padding:20px}.tabs button{padding-left:13px;padding-right:13px}.kpi-value{font-size:20px}.hero-number{font-size:40px}.intro h1{font-size:38px}.intro-note{min-width:210px}.result-columns{grid-template-columns:1fr}}
@media(max-width:800px){main{padding:0 18px}.topbar{height:72px;padding:0 18px}.private{display:none}.intro{padding:30px 0 24px}.intro-note{display:none}.intro h1{font-size:33px}.intro p{font-size:12px}.work-grid{grid-template-columns:1fr}.inputs{max-width:none}.tabs{margin-bottom:20px}.tabs button{padding:14px 10px;gap:7px}.tabs button span{font-size:12px}.panel{padding:22px}.method-grid{grid-template-columns:1fr}.result-columns{grid-template-columns:1fr 1fr}.kpi-value{font-size:22px}.top-actions{gap:7px}.iconbtn{font-size:11px;padding:9px}.hero-number{font-size:40px}footer{font-size:9px}footer>span:nth-child(2){display:none}}
@media(max-width:480px){.kpis{grid-template-columns:1fr;gap:8px}.kpi{display:grid;grid-template-columns:1fr auto;gap:2px 16px;padding:13px 16px}.kpi-value{grid-row:1/3;grid-column:2;margin:0;align-self:center;font-size:24px}.kpi-note{grid-column:1}.result-columns{grid-template-columns:1fr}.hero-card{padding:24px}.hero-number{font-size:38px}.chart-head{display:block}.legend{margin-bottom:15px}.brand{font-size:24px}.brandmark{width:37px;height:37px;font-size:15px}.panel-head h2{font-size:16px}.intro h1{font-size:29px}.intro p{max-width:290px}.small-table{font-size:10px}.small-table td,.small-table th{padding:10px 7px}}
@media print{.topbar,.intro,.tabs,footer,.primary,.secondary,.add,.remove,.textbtn,#toast,dialog,.dirty-box{display:none!important}body{background:#fff;font-size:11px}main{padding:0;max-width:none}.work-grid{grid-template-columns:260px 1fr;gap:18px}.panel,.chart-panel,.hero-card,.kpi{break-inside:avoid;border:1px solid #ccc}.hero-card{background:#fff!important;color:#123e38!important}.hero-card p,.hero-card .hero-label,.hero-number small{color:#456!important}.hero-chip{color:#123e38}input,select{border:0!important;background:transparent!important}.stale{opacity:1}.panel{padding:15px}.kpis{grid-template-columns:repeat(3,1fr)}.kpi{display:block}.kpi-value{font-size:20px}.result-columns{display:block}.result-columns .panel{margin-bottom:15px}}
/* Language controls and the standalone learning pages. */
.languages{display:flex;gap:2px;padding:3px;border:1px solid var(--line,#dbe0d4);border-radius:9px;background:rgba(255,255,255,.65);flex-shrink:0}
.languages button{font-family:inherit;font-weight:600;line-height:1.2;font-size:11px;letter-spacing:.04em;padding:7px 9px;border:0;border-radius:6px;background:transparent;color:#627066;cursor:pointer}
.languages button.selected{background:#123e38;color:#fff}.languages button:focus-visible{outline:2px solid #477e57;outline-offset:2px}
.document-header{max-width:1100px;margin:0 auto;padding:25px 30px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dbe0d4}
.document-header .brand{font-size:26px}.document-footer{max-width:1040px;margin:30px auto;padding:25px 0;display:flex;flex-wrap:wrap;gap:8px;border-top:1px solid #dbe0d4}
.theory-page{max-width:930px}.theory-page .lead{font-size:20px;max-width:760px;color:#5e6e63}.theory-page section{scroll-margin-top:28px;margin:48px 0}.theory-page h2{font-size:26px;letter-spacing:-.02em}.theory-page p,.theory-page li{font-size:16px;line-height:1.8}.theory-page li{margin:12px 0}.theory-toc{display:flex;flex-wrap:wrap;gap:9px;margin:28px 0}.theory-toc a{background:#e8edde;padding:7px 13px;border-radius:20px;font-size:13px;text-decoration:none}.theory-example{padding:25px 30px;background:#e9f1e3;border-left:4px solid #477e57;border-radius:0 13px 13px 0;margin:22px 0}.theory-example>strong{font-size:30px;color:#123e38}.theory-example p{margin-bottom:0}.link-button{display:inline-block;text-decoration:none;width:auto}
@media(max-width:1100px){.topbar{flex-wrap:wrap;gap:12px}.topbar .tagline{display:none}.top-actions{margin-left:auto}.top-actions .private{display:none}}
@media(max-width:600px){.top-actions{flex-wrap:wrap;gap:8px}.topbar{padding:18px 20px}.languages button{padding:8px}.topbar .brand{font-size:25px}.top-actions .iconbtn{padding:8px 9px;font-size:12px}.document-header{padding:20px}.document-footer{margin:20px;padding:20px 0}.theory-page .lead{font-size:17px}.theory-example{padding:20px}.theory-example>strong{font-size:25px}}
@media print{.languages,.theory-toc{display:none}}
footer>span:nth-child(2){display:block}footer div{flex-wrap:wrap;row-gap:12px}.document-footer a{font-size:12px}.theory-page{padding-top:32px}
@media(max-width:600px){.topbar{height:auto;min-height:72px}.top-actions{margin-left:0}.topbar{justify-content:space-between}footer{gap:14px}footer>span:nth-child(2){width:100%}}

/* Supporting tools follow the three core workflow steps. */
.intro{gap:28px}.intro-note{flex-shrink:0}.note-extra{border-top:1px solid var(--line);margin-top:12px;padding-top:12px}.note-extra .note-label{font-size:9px;letter-spacing:1.3px;text-transform:uppercase}.intro-note .note-extra p{font-size:12px;line-height:2;margin:7px 0 0}.note-extra b{color:var(--muted)}

.intro-note .note-link{display:flex;align-items:baseline;gap:15px;width:100%;padding:3px 0;border:0;background:transparent;color:var(--muted);font:inherit;line-height:1.6;text-align:left}.intro-note .note-link b{min-width:16px;margin-right:0}.intro-note .note-link:hover span{text-decoration:underline;text-underline-offset:3px;color:var(--green)}.intro-note .note-link.active span{color:var(--green);font-weight:650}