:root{
  --paper:#F5F6F2; --sheet:#FDFDFB; --sheet2:#EEF1EC; --ink:#15241D; --muted:#56655D; --line:#D8DED6;
  --green:#1E6B47; --green-2:#2B8A5E; --green-soft:#E1EEE6; --amber:#F3C14B; --amber-soft:#FFF3CC; --amber-ink:#5C4300;
  --red:#B4413A; --red-soft:#F7E1DF; --blue:#2C63A6; --blue-soft:#E1EAF6;
  --radius:10px; color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0F1813; --sheet:#16221B; --sheet2:#1C2B22; --ink:#E6EEE8; --muted:#A3B3A9; --line:#2A3B31;
  --green:#5DBB8C; --green-2:#7ACFA3; --green-soft:#1D3328; --amber:#F3C14B; --amber-soft:#3A2F12; --amber-ink:#F7D987;
  --red:#E58A83; --red-soft:#3B1F1D; --blue:#7FA9E0; --blue-soft:#1C2A3E; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0F1813; --sheet:#16221B; --sheet2:#1C2B22; --ink:#E6EEE8; --muted:#A3B3A9; --line:#2A3B31;
  --green:#5DBB8C; --green-2:#7ACFA3; --green-soft:#1D3328; --amber:#F3C14B; --amber-soft:#3A2F12; --amber-ink:#F7D987;
  --red:#E58A83; --red-soft:#3B1F1D; --blue:#7FA9E0; --blue-soft:#1C2A3E; color-scheme:dark}
:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
html{scroll-padding-top:calc(76px + env(safe-area-inset-top,0px))}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Heebo,"Segoe UI",Arial,sans-serif;font-size:16.5px;line-height:1.65}
h1,h2,h3,h4{font-family:Rubik,Heebo,Arial,sans-serif;line-height:1.2;margin:0}
p{margin:0}
a{color:var(--green)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--green);outline-offset:2px;border-radius:4px}
.skip{position:absolute;inset-inline-start:-999px}.skip:focus{inset-inline-start:12px;top:12px;z-index:99;background:var(--sheet);padding:8px 12px}
.inner{max-width:1180px;margin:0 auto;padding:0 22px}

/* header */
header.site{position:sticky;top:0;z-index:20;background:var(--paper);border-bottom:1px solid var(--line)}
header.site .inner{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit;flex:none}
.brand b{display:block;font-family:Rubik;font-size:16px;line-height:1.2}
.brand small{display:block;color:var(--muted);font-size:12.5px}
.fx{width:34px;height:34px;border-radius:8px;background:var(--green);color:var(--amber);display:grid;place-items:center;font:700 15px/1 Arial,sans-serif;font-style:italic;direction:ltr}
nav#nav{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;flex:1}
nav#nav a{padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--muted);font-weight:600;white-space:nowrap;font-size:15px}
nav#nav a[aria-current="page"]{color:var(--ink);background:var(--sheet2)}
nav#nav a:hover{color:var(--ink)}
.theme{border:1px solid var(--line);background:var(--sheet);border-radius:8px;padding:6px 10px;cursor:pointer;flex:none}

main{min-height:70vh;padding:28px 0 56px}
main:focus{outline:none}
.pagehead{padding:10px 0 22px}
.pagehead h1{font-size:34px}
.pagehead p{color:var(--muted);margin-top:8px;max-width:68ch}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);background:var(--sheet);border-radius:8px;padding:7px 13px;cursor:pointer;font-weight:600;font-size:14.5px;text-decoration:none;color:var(--ink)}
.btn:hover{border-color:var(--green)}
.btn.primary{background:var(--green);border-color:var(--green);color:#fff}
:root[data-theme="dark"] .btn.primary{color:#0F1813}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn.primary{color:#0F1813}}
.btn.ghost{background:none;border-color:transparent;color:var(--green)}
.btn.small{padding:4px 9px;font-size:13px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

/* home */
.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:center;padding:20px 0 36px}
.hero h1{font-size:46px;letter-spacing:-.5px}
.hero p.lead{font-size:19px;color:var(--muted);margin-top:16px;max-width:52ch}
.hero .row{margin-top:24px}
.formula{background:var(--sheet);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 1px 0 var(--line)}
.formula .bar{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--sheet2);font-size:13px;color:var(--muted)}
.formula .bar .cell{font:600 13px/1 Arial,sans-serif;direction:ltr;border:1px solid var(--line);background:var(--sheet);padding:4px 8px;border-radius:4px}
.formula .bar i{font:italic 700 14px Arial;color:var(--green);direction:ltr}
.formula .body{padding:16px 16px 18px;font-size:15.5px;white-space:pre-wrap}
.steps4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border:1px solid var(--line);border-radius:var(--radius);background:var(--sheet);overflow:hidden}
.steps4 a{display:block;padding:18px 18px 20px;text-decoration:none;color:inherit;border-inline-start:1px solid var(--line)}
.steps4 a:first-child{border-inline-start:0}
.steps4 a:hover{background:var(--sheet2)}
.steps4 .n{font:700 13px Rubik;color:var(--green);display:inline-block;border:1.5px solid var(--green);border-radius:50%;width:26px;height:26px;text-align:center;line-height:23px;margin-bottom:10px}
.steps4 h3{font-size:17px;margin-bottom:4px}
.steps4 p{color:var(--muted);font-size:14.5px}
.section{margin-top:44px}
.section > h2{font-size:24px;margin-bottom:14px}
.stagegrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.stagecard{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--sheet);text-decoration:none;color:inherit}
.stagecard:hover{border-color:var(--green)}
.stagecard .num{font:700 15px Rubik;color:var(--muted);min-width:22px}
.stagecard b{display:block;font-size:15.5px}
.stagecard span.s{color:var(--muted);font-size:13px;line-height:1.35;display:block}
.stagecard .ok{color:var(--green);font-weight:700}

/* intro */
.introsec{display:grid;grid-template-columns:260px minmax(0,1fr);gap:28px;padding:26px 0;border-top:1px solid var(--line)}
.introsec:first-of-type{border-top:0}
.introsec h2{font-size:22px}
.introsec .body{color:var(--muted);margin-bottom:14px;max-width:70ch}
.items{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.item{background:var(--sheet);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.item h3{font-size:16px;margin-bottom:4px}
.item p{color:var(--muted);font-size:14.5px}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.compare div{border-radius:var(--radius);padding:14px 16px;border:1px solid var(--line)}
.compare .bad{background:var(--red-soft)} .compare .good{background:var(--green-soft)}
.compare b{display:block;font-size:13px;margin-bottom:4px}
.pairs{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--sheet)}
.pairs .pr{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}
.pairs .pr:first-child{border-top:0}
.pairs .pr div{padding:11px 16px}
.pairs .pr div+div{border-inline-start:1px solid var(--line)}
.pairs .hd div{font-weight:700;font-size:14px}
.pairs .hd .d{color:var(--green)} .pairs .hd .x{color:var(--red)}

/* stages */
.sheettabs{display:flex;gap:2px;overflow-x:auto;border-bottom:2px solid var(--green);scrollbar-width:thin;margin-bottom:26px}
.sheettabs a{flex:none;padding:8px 14px 7px;text-decoration:none;color:var(--muted);background:var(--sheet2);border:1px solid var(--line);border-bottom:0;border-radius:8px 8px 0 0;font-weight:600;font-size:14.5px;white-space:nowrap}
.sheettabs a[aria-current="page"]{background:var(--green);color:#fff;border-color:var(--green)}
.sheettabs a .ok{color:var(--green);margin-inline-start:4px}
.sheettabs a[aria-current="page"] .ok{color:var(--amber)}
.stage{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px}
.stage h1{font-size:34px}
.stage .short{color:var(--green);font-weight:600;margin-top:6px;font-size:17px}
.stage .why{margin-top:14px;max-width:68ch}
.stage h2{font-size:19px;margin:30px 0 12px}
.checklist{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}
.checklist label{display:flex;gap:10px;align-items:flex-start;cursor:pointer;padding:6px 8px;border-radius:8px}
.checklist label:hover{background:var(--sheet2)}
.checklist input{margin-top:6px;accent-color:var(--green);width:17px;height:17px;flex:none}
.checklist input:checked + span{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--line)}
aside.side{display:flex;flex-direction:column;gap:14px}
.tipbox{background:var(--amber-soft);border-radius:var(--radius);padding:16px}
.tipbox h3{font-size:15px;margin-bottom:8px;color:var(--amber-ink)}
.tipbox ul{margin:0;padding-inline-start:18px;display:flex;flex-direction:column;gap:8px;font-size:14.5px}
.donebox{border:1.5px dashed var(--green);border-radius:var(--radius);padding:14px 16px}
.donebox h3{font-size:15px;color:var(--green);margin-bottom:6px}
.donebox p{font-size:14.5px}
.donebox .btn{margin-top:10px}
.pager{display:flex;justify-content:space-between;margin-top:34px;padding-top:18px;border-top:1px solid var(--line)}

/* prompt card */
.prompts{display:flex;flex-direction:column;gap:14px}
.pcard{background:var(--sheet);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.pcard .bar{display:flex;align-items:center;gap:10px;padding:9px 12px;border-bottom:1px solid var(--line);background:var(--sheet2);flex-wrap:wrap}
.pcard .bar i{font:italic 700 14px Arial;color:var(--green);direction:ltr}
.pcard .bar h3{font-size:15.5px;flex:1;min-width:160px}
.pcard .bar .when{font-size:12.5px;color:var(--muted)}
.pcard .ptext{padding:14px 16px;white-space:pre-wrap;font-size:15.5px;line-height:1.75}
.ph{background:var(--amber-soft);color:var(--amber-ink);border:1px solid var(--amber);border-radius:4px;padding:0 5px;font-weight:600;outline:none;cursor:text;white-space:pre-wrap}
.ph:focus{background:var(--sheet);box-shadow:0 0 0 2px var(--amber)}
.ph.filled{background:var(--green-soft);border-color:var(--green-2);color:var(--ink)}
.pcard .acts{display:flex;gap:6px;flex-wrap:wrap;padding:0 14px 14px}
.hint{font-size:12.5px;color:var(--muted)}

/* coach */
.coach{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;align-items:start}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-weight:600;font-size:14.5px}
.field .hint{margin-top:-2px}
select,input[type=text],input[type=search],input[type=number],textarea{border:1px solid var(--line);background:var(--sheet);border-radius:8px;padding:9px 11px;width:100%}
textarea{min-height:220px;resize:vertical;line-height:1.7}
.scorebox{background:var(--sheet);border:1px solid var(--line);border-radius:var(--radius);padding:18px;position:sticky;top:84px}
.score{display:flex;align-items:baseline;gap:10px}
.score .v{font:700 44px/1 Rubik}
.score .l{color:var(--muted)}
.meter{height:8px;background:var(--sheet2);border-radius:4px;overflow:hidden;margin:10px 0 16px;border:1px solid var(--line)}
.meter i{display:block;height:100%;background:var(--green);transition:width .3s}
.checks{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.checks li{display:grid;grid-template-columns:22px 1fr auto;gap:8px;align-items:start;font-size:14.5px}
.checks .ic{font-weight:700}
.checks .yes .ic{color:var(--green)} .checks .no .ic{color:var(--red)}
.checks .no b{color:var(--ink)}
.checks .tip{color:var(--muted);font-size:13.5px;display:block}
.warn{background:var(--red-soft);border-radius:8px;padding:9px 12px;font-size:14px;margin-top:10px}
.airesp{margin-top:16px;background:var(--sheet);border:1px solid var(--line);border-radius:var(--radius);padding:16px;white-space:pre-wrap}

/* red team */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:6px 0 26px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--sheet)}
.flow div{padding:14px 16px;border-inline-start:1px solid var(--line);font-size:14.5px}
.flow div:first-child{border-inline-start:0}
.flow b{display:block;font-family:Rubik;margin-bottom:2px}
.flow .k{color:var(--green);font:700 13px Rubik}
.rtgrid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:28px}
.card{background:var(--sheet);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:16px}
.card h2{font-size:18px;margin-bottom:4px}
.card > p.hint{margin-bottom:12px}
.drop{border:2px dashed var(--line);border-radius:var(--radius);padding:20px;text-align:center;cursor:pointer;background:var(--paper)}
.drop:hover,.drop.over{border-color:var(--green)}
.sheetsum{margin-top:12px;font-size:14px}
.sheetsum table{width:100%;border-collapse:collapse}
.sheetsum td,.sheetsum th{border-bottom:1px solid var(--line);padding:6px 8px;text-align:right;vertical-align:top}
.sheetsum th{font-size:13px;color:var(--muted);font-weight:600}
.finding{display:grid;grid-template-columns:1.4fr .8fr 1.4fr auto;gap:8px;margin-bottom:8px;align-items:start}
.finding .rm{border:0;background:none;color:var(--red);cursor:pointer;font-size:18px;padding:6px}
.findhd{display:grid;grid-template-columns:1.4fr .8fr 1.4fr auto;gap:8px;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:4px}
.findhd span:last-child{width:30px}
pre.out{white-space:pre-wrap;background:var(--sheet2);border:1px solid var(--line);border-radius:8px;padding:14px;font-family:Heebo,Arial,sans-serif;font-size:14px;max-height:340px;overflow:auto;margin:0}
.side ol{padding-inline-start:20px;margin:0;display:flex;flex-direction:column;gap:8px;font-size:14.5px}

/* glossary */
.gtools{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.gtools input{max-width:320px}
.chip{border:1px solid var(--line);background:var(--sheet);border-radius:999px;padding:5px 13px;cursor:pointer;font-size:14px}
.chip[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:#fff}
.gloss{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px}
.term{background:var(--sheet);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.term header{display:flex;justify-content:space-between;gap:8px;align-items:baseline;margin-bottom:6px}
.term h3{font-size:18px}
.term .en{direction:ltr;color:var(--muted);font-size:13px}
.term .cat{font-size:12px;color:var(--green);font-weight:600}
.term .ex{margin-top:8px;font-size:14px;color:var(--muted);border-inline-start:3px solid var(--amber);padding-inline-start:10px}
.empty{padding:30px;text-align:center;color:var(--muted)}

/* footer */
footer.site{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:14px}
footer.site .inner{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
footer.site button{border:0;background:none;color:var(--muted);text-decoration:underline;cursor:pointer;padding:0}

/* toasts */
.toasts{position:fixed;bottom:calc(18px + env(safe-area-inset-bottom,0px));inset-inline-start:18px;z-index:60;display:flex;flex-direction:column;gap:8px;max-width:min(380px,calc(100% - 36px))}
.toast{background:var(--ink);color:var(--paper);padding:11px 14px;border-radius:10px;font-size:14.5px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
@media (prefers-reduced-motion:no-preference){.toast{animation:tin .25s ease-out}@keyframes tin{from{opacity:0;transform:translateY(8px)}}}

/* edit mode */
.editbar[hidden]{display:none}
.editbar{position:sticky;top:0;z-index:30;background:var(--amber);color:#2B2000;padding:8px 22px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:14.5px}
.editbar .btn{background:#FFF8E2;border-color:#C79A1E;color:#2B2000}
body.editing header.site{top:44px}
body.editing [data-path]{outline:1px dashed var(--amber);outline-offset:2px;border-radius:3px;cursor:text}
body.editing [data-path]:focus{outline:2px solid var(--amber);background:var(--amber-soft)}
.edadd{border:1px dashed var(--amber);background:none;color:var(--amber-ink);border-radius:8px;padding:4px 10px;cursor:pointer;font-size:13px;margin-top:6px}
.eddel{border:0;background:var(--red-soft);color:var(--red);border-radius:6px;cursor:pointer;font-size:12px;padding:2px 7px}
textarea.rawprompt{min-height:140px;font-size:14.5px;border-color:var(--amber)}

@media (max-width:980px){
  .hero{grid-template-columns:1fr}.stage,.coach,.rtgrid{grid-template-columns:1fr}.scorebox{position:static}
  .introsec{grid-template-columns:1fr;gap:10px}.steps4,.flow{grid-template-columns:1fr 1fr}
  .steps4 a:nth-child(3),.flow div:nth-child(3){border-inline-start:0}
  .steps4 a:nth-child(n+3),.flow div:nth-child(n+3){border-top:1px solid var(--line)}
}
@media (max-width:620px){
  body{font-size:16px}.inner{padding:0 14px}.hero h1{font-size:34px}.pagehead h1,.stage h1{font-size:28px}
  .brand small{display:none}.compare{grid-template-columns:1fr}
  .finding,.findhd{grid-template-columns:1fr}.findhd{display:none}.finding{border-bottom:1px solid var(--line);padding-bottom:8px}
  header.site .inner{flex-wrap:wrap;gap:6px;padding-top:8px}nav#nav{order:3;flex-basis:100%}
}