/* Northfield interactive application, CAI theme. Uses css/cai-tokens.css. */
*,*::before,*::after{box-sizing:border-box}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0;background:var(--cai-sand);color:var(--cai-charcoal);font-family:var(--cai-font);font-size:15px;line-height:1.55;font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer;border:1px solid var(--cc-card-border);background:var(--cai-white);border-radius:var(--cc-radius-button);padding:8px 15px;font-weight:600}
button:hover{border-color:var(--cai-charcoal)}
button.primary{background:var(--cai-rust);border-color:var(--cai-rust);color:var(--cai-white);font-weight:700}
button.primary:hover{background:#9f4833;border-color:#9f4833}
button.link{border:none;background:none;padding:0;color:var(--cai-rust);text-decoration:underline;text-underline-offset:3px;font-weight:600}
:focus-visible{outline:2px solid var(--cai-rust);outline-offset:2px}
input,select{background:var(--cai-white);border:1px solid var(--cc-card-border);border-radius:var(--cc-radius-button);padding:8px 11px;width:100%}
label{font-size:13px;color:var(--cc-text-muted);display:block;margin-bottom:4px}
h1{font-size:25px;font-weight:700;margin:0 0 6px;letter-spacing:-0.02em;line-height:1.2}
h2{font-size:17px;font-weight:700;margin:0 0 10px;letter-spacing:-0.01em}
p{margin:0 0 10px}
small,.small{color:var(--cc-text-muted);font-size:13px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:0.14em;text-transform:uppercase;color:var(--cai-rust);margin:0 0 10px}

/* app chrome */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--cai-white);border-bottom:1px solid var(--cc-card-border);display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:10px 22px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:30px;width:auto}
.brand .offer{font-weight:700;font-size:16px;letter-spacing:-0.01em}
.topctl{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:13px}
.topctl select{width:auto}
.switch{display:flex;align-items:center;gap:6px;color:var(--cc-text-muted)}
.switch input{width:auto}
.strip{display:flex;flex-wrap:wrap;border-bottom:1px solid var(--cc-card-border);background:var(--cai-sand)}
.strip div{padding:8px 22px;border-right:1px solid var(--cc-rule);font-size:12px;color:var(--cc-text-muted)}
.strip b{display:block;font-size:14px;color:var(--cai-charcoal);font-weight:700}
.shell{display:grid;grid-template-columns:214px minmax(0,1fr);min-height:calc(100vh - 112px)}
nav{border-right:1px solid var(--cc-card-border);padding:12px 12px 30px;background:var(--cai-sand)}
nav button{display:block;width:100%;text-align:left;border:none;background:none;padding:6px 12px;border-radius:8px;font-size:14px;color:var(--cc-text-body);font-weight:500}
nav button:hover{background:var(--cai-white)}
nav button.on{background:var(--cai-white);color:var(--cai-charcoal);font-weight:700;box-shadow:inset 3px 0 0 var(--cai-rust)}
.navh{font-size:11px;font-weight:700;letter-spacing:0.14em;text-transform:uppercase;color:var(--cai-rust);padding:16px 12px 4px}
main{padding:24px 30px 150px;max-width:1120px;min-width:0}

/* content */
.panel{background:var(--cai-white);border:1px solid var(--cc-card-border);border-radius:14px;padding:20px 22px;margin:0 0 16px}
.note{background:var(--cai-white);border:1px solid var(--cc-card-border);border-left:3px solid var(--cai-rust);border-radius:0 12px 12px 0;padding:12px 16px;margin:0 0 18px;font-size:14px}
.note dl{display:grid;grid-template-columns:150px minmax(0,1fr);gap:5px 14px;margin:0}
.note dt{color:var(--cai-rust);font-size:11px;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;padding-top:3px}
.note dd{margin:0}
.tbl{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:14px}
th{text-align:left;font-weight:700;color:var(--cc-text-muted);font-size:12px;border-bottom:1px solid var(--cc-card-border);padding:8px 10px;white-space:nowrap}
td{border-bottom:1px solid var(--cc-rule);padding:8px 10px;vertical-align:top}
td.n,th.n{text-align:right}
tr.total td{font-weight:700;border-bottom:none;border-top:1px solid var(--cai-charcoal)}
.tag{display:inline-block;font-size:12px;padding:2px 9px;border-radius:5px;white-space:nowrap;font-weight:700}
.ok{background:var(--cc-match-bg);color:var(--cc-match)}
.bad{background:var(--cc-attention-bg);color:var(--cc-attention)}
.pend{background:var(--cc-pending-bg);color:var(--cai-charcoal)}
.neu{background:var(--cai-sand);color:var(--cc-text-muted);border:1px solid var(--cc-rule)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.msg{font-size:13px;margin-top:8px;min-height:20px}
.msg.err{color:var(--cc-attention);font-weight:600}
.msg.good{color:var(--cc-match);font-weight:600}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px}
.big{font-size:32px;font-weight:700;letter-spacing:-0.02em}
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin-top:8px}
.step{padding:10px 12px 4px 0;border-top:3px solid var(--cc-rule);font-size:13px}
.step b{display:block;font-size:13.5px}
.step span{color:var(--cc-text-muted);font-size:12px}
.step.done{border-top-color:var(--cai-charcoal)}
.step.cur{border-top-color:var(--cai-rust)}
.checks{list-style:none;margin:0;padding:0}
.checks li{display:grid;grid-template-columns:22px 170px minmax(0,1fr);gap:8px;padding:9px 0;border-bottom:1px solid var(--cc-rule);font-size:14px}
.ic{font-weight:700;text-align:center}
.ic.p{color:var(--cc-match)}.ic.f{color:var(--cc-attention)}.ic.r{color:var(--cai-charcoal)}.ic.w{color:var(--cc-text-muted)}
.files{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin:10px 0}
.files button{text-align:left;padding:12px 14px;font-weight:600}
.files small{display:block;font-weight:400}
.files button.sel{border-color:var(--cai-rust);box-shadow:inset 0 0 0 1px var(--cai-rust)}
.hash{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;color:var(--cc-text-muted)}
.denied{color:var(--cc-attention);font-weight:600}
.diff-up{color:var(--cc-attention);font-weight:700}
.diff-down{color:var(--cc-match);font-weight:700}

/* start screen */
.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:center;padding:18px 0 10px}
.hero h1{font-size:40px;line-height:1.08;letter-spacing:-0.035em;margin:0 0 16px;max-width:15em}
.hero .lede{font-size:18px;color:var(--cc-text-body);max-width:34em;margin-bottom:22px}
.proof{background:var(--cai-white);border:1px solid var(--cc-card-border);border-radius:18px;box-shadow:var(--cc-card-shadow);padding:26px 28px}
.proof .pr{display:flex;justify-content:space-between;align-items:baseline;padding:12px 0;border-bottom:1px solid var(--cc-rule);font-size:15px;color:var(--cc-text-body)}
.proof .pr b{font-size:24px;font-weight:700;color:var(--cai-charcoal)}
.proof .pr.zero{border-bottom:none}
.proof .pr.zero b{color:var(--cc-match)}

/* workbook */
.xl{border:1px solid #c9c2b8;border-radius:10px;overflow:hidden;background:var(--cai-white)}
.xl .bar{display:flex;justify-content:space-between;gap:10px;padding:9px 12px;background:#f1eee9;border-bottom:1px solid #c9c2b8;font-size:13px}
.xl .fx{display:flex;gap:8px;padding:6px 12px;border-bottom:1px solid var(--cc-rule);font-size:13px;align-items:center}
.xl .fx .ref{width:52px;color:var(--cc-text-muted)}
.xl .fx code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px}
.xl table{font-size:13px}
.xl th,.xl td{border:1px solid #e1dcd4;padding:5px 9px;white-space:nowrap}
.xl th{background:#f1eee9;color:var(--cc-text-muted);text-align:center;font-weight:600}
.xl td.rh{background:#f1eee9;color:var(--cc-text-muted);text-align:center;width:36px}
.xl td.typed{background:var(--cc-attention-bg);color:var(--cc-attention);font-weight:700;position:relative}
.xl td.typed::after{content:"";position:absolute;top:0;right:0;border-top:8px solid var(--cc-attention);border-left:8px solid transparent}
.xl .tabs{display:flex;border-top:1px solid #c9c2b8;background:#f1eee9;font-size:13px}
.xl .tabs span{padding:6px 14px;border-right:1px solid #e1dcd4}
.xl .tabs span.on{background:var(--cai-white);font-weight:700}
.xl .tabs span.hid{color:var(--cc-text-muted);font-style:italic}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:16px;border-top:2px solid var(--cai-charcoal)}
.facts div{padding:12px 14px 0 0;font-size:14px;font-weight:600}

/* replay */
.grid24{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:6px;margin:12px 0}
.cell{border:1px solid var(--cc-card-border);border-radius:8px;padding:8px;font-size:12px;background:var(--cai-white);text-align:left;min-height:58px;font-weight:500;transition:background .25s,border-color .25s}
.cell b{display:block;font-size:13px}
.cell.m{background:var(--cc-match-bg);border-color:#b9cdbd}
.cell.x{background:var(--cc-attention-bg);border-color:var(--cai-rust)}
.kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.kv div{border:1px solid var(--cc-card-border);border-radius:10px;padding:11px 14px;background:var(--cai-white)}
.kv span{display:block;font-size:12.5px;color:var(--cc-text-muted)}
.kv b{font-size:19px;font-weight:700}
.ledger td.n{font-size:15px}

/* sign-in chooser */
.users{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:10px}
.users button{text-align:left;padding:14px 16px}
.users b{display:block}
.users small{font-weight:400}

/* guided tour */
.tour-hl{outline:2px solid var(--cai-rust)!important;outline-offset:5px;border-radius:8px}
#tour{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:70;width:min(840px,calc(100% - 24px));background:var(--cai-white);color:var(--cai-charcoal);border:1px solid var(--cc-card-border);border-radius:14px;padding:18px 22px 14px;display:none;box-shadow:0 14px 40px rgba(31,41,55,.14)}
#tour.show{display:block}
#tour p{margin:0;font-size:19px;line-height:1.45;font-weight:500}
#tour .tf{display:flex;justify-content:space-between;align-items:center;margin-top:10px;font-size:12px;color:var(--cc-text-muted);gap:10px;font-weight:700;letter-spacing:0.08em}
#tour .bar{height:2px;background:var(--cc-rule);margin-top:10px;overflow:hidden}
#tour .bar i{display:block;height:100%;background:var(--cai-rust)}
#titlecard{position:fixed;inset:0;z-index:60;background:var(--cai-sand);display:none;align-items:center;padding:60px 90px}
#titlecard.show{display:flex}
#titlecard .tc-in{max-width:1000px}
#titlecard .tc-logo{height:52px;width:auto;margin-bottom:56px;display:block}
#titlecard h1{font-size:62px;line-height:1.05;letter-spacing:-0.035em;margin:0 0 26px;max-width:14em}
#titlecard .tc-sub{font-size:22px;color:var(--cc-text-body);margin:0}
#titlecard .tc-foot{font-size:15px;color:var(--cc-text-muted);margin-top:40px}
#titlecard .tc-close{text-align:left}

@media (max-width:860px){
 .shell{grid-template-columns:minmax(0,1fr)}
 nav{display:flex;overflow-x:auto;border-right:none;border-bottom:1px solid var(--cc-card-border);padding:6px}
 nav button{white-space:nowrap;width:auto}
 .navh{display:none}
 main{padding:18px 16px 180px}
 .hero,.two{grid-template-columns:minmax(0,1fr)}
 .hero h1{font-size:30px}
 .steps{grid-template-columns:minmax(0,1fr)}
 .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
 .grid24{grid-template-columns:repeat(3,minmax(0,1fr))}
 .note dl{grid-template-columns:minmax(0,1fr)}
 .checks li{grid-template-columns:22px minmax(0,1fr)}
 .checks li span:last-child{grid-column:2}
 #titlecard{padding:30px 24px}
 .brand .tag{display:none}
 .topctl select{max-width:100%}
 .top{padding:10px 14px}
 #titlecard h1{font-size:36px}
}
@media (prefers-reduced-motion:reduce){.cell{transition:none}}

/* Aliases for variable names used inline by js/demo-app.js */
:root{--muted:var(--cc-text-muted);--fail:var(--cc-attention);--pass:var(--cc-match);--accent:var(--cai-rust);--rule:var(--cc-rule);--note:var(--cai-sand);--ink:var(--cai-charcoal);--surface:var(--cai-white);--paper:var(--cai-sand)}