:root{--bg:#ededeb;--bg-rgb:237,237,235;--ink:#171417;--lime:#f0ff70;--paper:#f8f8f5;--muted:#696866;--line:rgba(23,20,23,.18)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit;color:inherit}
button,select,summary{cursor:pointer}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.section-mark,.toolbar-actions,.pilot-line,.field label,.field legend,.field-help,.form-note,.result-kicker,.confidence,.land-summary,.plan-rank,.plan-tags,.plan-metrics,.section-row,.scenario,.result-actions,.disclaimer,.ground-footer{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}

.toolbar{height:58px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 18px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;background:rgba(var(--bg-rgb),.93);backdrop-filter:blur(14px)}
.brand{display:inline-flex;height:28px;align-items:center}
.brand img{height:26px;width:auto;display:block}
.section-mark{font-size:11px;letter-spacing:.04em;color:var(--muted)}
.toolbar-actions{justify-self:end;display:flex;align-items:center;gap:22px;font-size:11px;text-transform:uppercase}
.language{display:flex;gap:5px;align-items:center}
.language button{border:0;padding:0;background:transparent;opacity:.4}
.language button.is-active{opacity:1;border-bottom:1px solid currentColor}

.ground-shell{min-height:calc(100vh - 58px);display:grid;grid-template-columns:minmax(390px,42%) 1fr}
.input-panel{padding:18px;border-right:1px solid var(--line);background:rgba(255,255,255,.1)}
.pilot-line{display:flex;align-items:center;gap:8px;font-size:11px;text-transform:uppercase}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--lime);border:1px solid var(--ink)}
.pilot-note{margin-left:auto;color:var(--muted)}
.tool-intro{padding:clamp(42px,7vh,76px) 0 34px}
.tool-intro h1{margin:0;max-width:670px;font-size:clamp(50px,5.8vw,88px);line-height:.9;letter-spacing:-.065em;font-weight:500}
.tool-intro p{margin:24px 0 0;max-width:560px;line-height:1.5;color:var(--muted)}

.ground-form{display:grid;grid-template-columns:1fr 1fr;gap:24px 14px;border-top:1px solid var(--ink);padding-top:18px}
.field{min-width:0}
.field-wide{grid-column:1/-1}
.field label,.field legend{display:block;border:0;padding:0;margin:0 0 9px;font-size:14px;text-transform:uppercase;letter-spacing:.035em}
.field label em{font-style:normal;color:var(--muted);font-size:10px;margin-left:5px}
.field input[type=text],.field input[type=number],.field select{width:100%;min-height:48px;border:1px solid var(--line);border-radius:0;background:rgba(255,255,255,.32);padding:10px 12px;outline:none}
.field input:focus,.field select:focus{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}
.field-help{display:block;margin-top:7px;color:var(--muted);font-size:12px;line-height:1.4}
.input-unit{display:grid;grid-template-columns:1fr auto;align-items:center;border:1px solid var(--line);background:rgba(255,255,255,.32)}
.input-unit input{border:0!important;background:transparent!important}
.input-unit span{padding:0 12px;font:12px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.choice-field{border:0;padding:0;margin:0}
.segmented{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--ink)}
.segmented label{margin:0}
.segmented input{position:absolute;opacity:0;pointer-events:none}
.segmented span{min-height:44px;display:flex;align-items:center;justify-content:center;padding:8px;border-right:1px solid var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:14px;text-transform:none}
.segmented label:last-child span{border-right:0}
.segmented input:checked+span{background:var(--ink);color:var(--paper)}
.segmented input:focus-visible+span{outline:2px solid var(--ink);outline-offset:2px}
.measure-panel{border:1px solid var(--ink);background:rgba(255,255,255,.22)}
.measure-panel summary{min-height:50px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;list-style:none;text-transform:uppercase;font:14px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.measure-panel summary::-webkit-details-marker,.plan-detail summary::-webkit-details-marker{display:none}
.measure-panel summary span:last-child,.plan-detail summary b{transition:transform .15s}
.measure-panel[open] summary span:last-child,.plan-detail[open] summary b{transform:rotate(45deg)}
.measure-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px 14px;padding:18px 12px;border-top:1px solid var(--line)}
.measure-note{margin:0;padding:0 12px 16px;color:var(--muted);font-size:13px;line-height:1.45}
.analyse-button{grid-column:1/-1;min-height:58px;display:flex;align-items:center;justify-content:space-between;border:0;background:var(--ink);color:var(--paper);padding:0 16px;text-transform:uppercase;font:14px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.analyse-button:hover{background:var(--lime);color:var(--ink)}
.analyse-button span:last-child{font-size:24px}
.form-note{margin:12px 0 36px;font-size:12px;line-height:1.45;color:var(--muted)}

.result-panel{min-width:0;min-height:calc(100vh - 58px);background:var(--paper)}
.result-empty{min-height:calc(100vh - 58px);display:flex;flex-direction:column;justify-content:space-between;padding:18px;background:var(--lime)}
.empty-number{font:12px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.result-empty p{margin:0;max-width:760px;font-size:clamp(44px,5.8vw,86px);line-height:.92;letter-spacing:-.065em}
.results{padding:18px}
.result-head{display:grid;grid-template-columns:1fr auto;gap:30px;padding-bottom:20px;border-bottom:1px solid var(--ink)}
.result-kicker{margin:0 0 12px;font-size:11px;letter-spacing:.035em;color:var(--muted)}
.result-head h2{margin:0;max-width:720px;font-size:clamp(42px,5.2vw,76px);line-height:.9;letter-spacing:-.065em;font-weight:500}
.confidence{min-width:150px;text-align:right}
.confidence span,.confidence small{display:block;font-size:11px;color:var(--muted)}
.confidence strong{display:block;margin:8px 0 5px;font-size:24px;font-weight:500}
.land-summary{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.land-summary div{padding:13px 12px 13px 0}
.land-summary span,.land-summary strong{display:block}
.land-summary span{margin-bottom:7px;font-size:10px;color:var(--muted)}
.land-summary strong{font-size:12px;font-weight:500}

.plan-list{border-bottom:1px solid var(--ink)}
.plan-card{display:grid;grid-template-columns:46px minmax(0,1fr) minmax(250px,38%);gap:14px;padding:22px 0;border-bottom:1px solid var(--line)}
.plan-card:last-child{border-bottom:0}
.plan-rank{font-size:11px;color:var(--muted);padding-top:5px}
.plan-name{margin:0 0 8px;font-size:clamp(28px,3vw,45px);line-height:.98;letter-spacing:-.05em;font-weight:500}
.plan-reason{margin:0;max-width:520px;color:var(--muted);font-size:15px;line-height:1.48}
.plan-tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:13px}
.plan-tags span{border:1px solid var(--line);padding:5px 7px;font-size:10px;text-transform:uppercase}
.plan-metrics{display:grid;grid-template-columns:1fr 1fr;align-content:start}
.plan-metrics div{padding:5px 0 12px;border-bottom:1px solid var(--line)}
.plan-metrics div:nth-child(even){text-align:right}
.plan-metrics span,.plan-metrics strong{display:block}
.plan-metrics span{font-size:10px;color:var(--muted);margin-bottom:5px}
.plan-metrics strong{font-size:12px;font-weight:500}
.plan-detail{grid-column:2/-1;margin-top:5px;border-top:1px solid var(--ink)}
.plan-detail summary{min-height:48px;display:flex;align-items:center;justify-content:space-between;list-style:none;font:14px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.plan-detail summary b{font-size:20px;font-weight:400}
.design-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.design-grid>div{min-height:130px;padding:12px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.design-grid span,.first-moves>span{font:10px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;color:var(--muted)}
.design-grid p{margin:22px 0 0;font-size:14px;line-height:1.5}
.first-moves{padding-top:18px}
.first-moves ol{list-style:none;margin:12px 0 0;padding:0;border-top:1px solid var(--line)}
.first-moves li{display:grid;grid-template-columns:34px 1fr;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.4}
.first-moves li span{font:10px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;color:var(--muted);padding-top:3px}

.scenario-section{padding:22px 0 28px;border-bottom:1px solid var(--ink)}
.section-row{display:flex;justify-content:space-between;gap:24px;margin-bottom:16px;font-size:11px}
.section-row p{margin:0}
.section-row p:last-child{color:var(--muted)}
.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--ink)}
.scenario{min-height:130px;padding:12px;border-right:1px solid var(--ink);display:flex;flex-direction:column}
.scenario:last-child{border-right:0}
.scenario span,.scenario small{font-size:10px}
.scenario strong{margin:auto 0 4px;font-size:28px;font-weight:500}
.scenario small{color:var(--muted)}
.scenario.hot{background:#ff866d}
.scenario.normal{background:var(--bg)}
.scenario.wet{background:var(--lime)}
.missing-section{display:grid;grid-template-columns:1fr 1fr;gap:28px;padding:28px 0;border-bottom:1px solid var(--line)}
.missing-section h3{margin:0;font-size:clamp(30px,3.7vw,54px);line-height:.97;letter-spacing:-.05em;font-weight:500}
.measure-actions{border-top:1px solid var(--line)}
.measure-actions button{width:100%;display:flex;justify-content:space-between;gap:20px;padding:11px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;font-size:14px}
.measure-actions button b{font:11px ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-weight:400}
.measure-actions p{margin:0;font-size:14px;line-height:1.5}
.result-actions{display:flex;gap:8px;padding-top:18px}
.result-actions button{border:1px solid var(--ink);background:transparent;padding:11px 13px;font-size:14px;text-transform:uppercase}
.result-actions button:first-child{background:var(--ink);color:var(--paper)}
.result-actions button.is-saved{background:var(--lime);color:var(--ink)}
.disclaimer{margin:20px 0 4px;max-width:850px;font-size:11px;line-height:1.5;color:var(--muted);text-transform:uppercase}
.ground-footer{min-height:100px;display:flex;justify-content:space-between;align-items:flex-end;gap:20px;padding:18px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}
.ground-footer p{margin:0}

@media(max-width:980px){.ground-shell{grid-template-columns:1fr}.input-panel{border-right:0;border-bottom:1px solid var(--ink)}.result-empty{min-height:52vh}}
@media(max-width:640px){
  .toolbar{height:54px;grid-template-columns:1fr auto;padding:0 14px}.section-mark{display:none}.brand img{height:22px}.toolbar-actions{gap:14px}
  .input-panel,.results,.result-empty{padding:14px}.pilot-note{display:none}.tool-intro{padding:38px 0 28px}.tool-intro h1{font-size:52px}
  .ground-form,.measure-grid{grid-template-columns:1fr}.field-wide,.analyse-button{grid-column:1}
  .segmented{grid-template-columns:1fr 1fr}.segmented label:nth-child(2) span{border-right:0}.segmented label:nth-child(-n+2) span{border-bottom:1px solid var(--ink)}
  .result-head{grid-template-columns:1fr}.confidence{text-align:left}.land-summary{grid-template-columns:1fr 1fr}
  .plan-card{grid-template-columns:30px 1fr}.plan-metrics,.plan-detail{grid-column:2}.design-grid{grid-template-columns:1fr}
  .scenario-grid{grid-template-columns:1fr}.scenario{min-height:105px;border-right:0;border-bottom:1px solid var(--ink)}.scenario:last-child{border-bottom:0}
  .missing-section{grid-template-columns:1fr}.ground-footer{flex-direction:column;align-items:flex-start}
}