/* Ticker: banknote paper, money green and gold, board-game title deeds, ticker tape. Overrides base.css */
:root{--paper:#f4eedd;--paper2:#fbf8ee;--ink:#14261c;--ink2:#34463a;--mut:#6e7b70;--rule:#d8cfb4;--acc:#1d6b43;--acc2:#c9a227;--pen:#c0392b;--ok:#1d7a46;--no:#c0392b;--gold:#c9a227;--gold2:#f1d26b;--money:#1d5c3a;
  --s:'Source Serif 4',Georgia,serif;--d:'DM Serif Display',Georgia,serif;--u:'Rubik',system-ui,sans-serif;--m:'IBM Plex Mono',ui-monospace,monospace;--h:'Rubik',sans-serif}
body{font-family:var(--s);font-size:18px;background:var(--paper);
  background-image:radial-gradient(circle at 0 0,rgba(29,92,58,.06) 0 2px,transparent 3px),repeating-radial-gradient(circle at 50% -40%,transparent 0 22px,rgba(29,92,58,.035) 23px 24px);background-size:26px 26px,100% 100%;background-attachment:local,fixed}
::selection{background:var(--gold2)}
nav.top{background:var(--money);border-bottom:3px solid var(--gold);color:#f4eedd}
nav.top .logo{color:#fff;font-family:var(--d);font-size:1.45rem;letter-spacing:.01em}
.logo .tk{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff3b0,var(--gold) 55%,#8a6c12);color:var(--money);font-family:var(--d);font-size:1.15rem;box-shadow:inset 0 0 0 2px rgba(0,0,0,.15),0 2px 0 rgba(0,0,0,.25)}
.crs a{font-family:var(--u);font-weight:500;font-size:.78rem;color:#dfe9df;border-bottom:2px solid transparent;padding:7px 10px}
.crs a:hover,.crs a.on{color:#fff;border-color:var(--gold)}
.bank{font-family:var(--m);font-size:.78rem;background:#0f3b24;color:var(--gold2);border:1px solid var(--gold);border-radius:999px;padding:5px 12px;white-space:nowrap;margin-left:10px}
.bank b{color:#fff}
.tape{background:#0b1a12;color:#cfe8d6;font-family:var(--m);font-size:.78rem;white-space:nowrap;overflow:hidden;border-bottom:1px solid #000;position:sticky;top:57px;z-index:29}
.tape .run{display:inline-block;padding:6px 0;animation:tape 60s linear infinite}
.tape span{margin-right:34px}.tape .up{color:#3ddc84}.tape .dn{color:#ff6b5e}
@keyframes tape{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.tape .run{animation:none}}
/* hero = banknote */
.chero{padding:64px 0 40px;border-bottom:0}
.chero .wrap{position:relative}
.chero::after{content:"";position:absolute;inset:18px;border:2px solid var(--money);outline:1px solid var(--money);outline-offset:-8px;pointer-events:none;border-radius:6px}
.chero .kick{color:var(--money);font-family:var(--u);font-weight:600;letter-spacing:.12em}
.chero .kick span:first-child{background:var(--money);color:var(--gold2);padding:4px 10px;border-radius:3px}
.chero h1{font-family:var(--d);font-weight:400;font-size:clamp(2.8rem,6.6vw,5.6rem);line-height:.95;color:var(--money);letter-spacing:-.01em}
.chero h1::after{content:"";display:block;width:120px;height:4px;margin-top:18px;background:linear-gradient(90deg,var(--gold),var(--gold2),var(--gold))}
@media(min-width:900px){.chero h1,.chero .kick,.chero p{max-width:min(620px,52vw)}}
.chero p{color:var(--ink2)}
.hstats{border:2px solid var(--money);background:var(--paper2);border-radius:8px;max-width:720px}
.hstats div{border-right:1px dashed var(--rule);font-family:var(--u);font-size:.72rem;text-transform:uppercase;letter-spacing:.06em}
.hstats b{font-family:var(--d);font-weight:400;font-size:1.8rem;color:var(--money)}
.labbtn{border-radius:999px;background:var(--money);border:2px solid var(--gold)}
.tabs{background:var(--paper2);border-bottom:2px solid var(--money)}
.tabs .wrap{gap:8px;padding-top:12px;padding-bottom:12px}
.tabs button{font-family:var(--u);font-weight:600;font-size:.86rem;padding:8px 18px;border-radius:999px;border:2px solid var(--money);color:var(--money);background:#fff}
.tabs button.on{background:var(--money);color:#fff;box-shadow:0 3px 0 var(--gold)}
/* lessons = title deeds */
.chap{background:#fffdf6;border:2px solid var(--ink);border-radius:6px;margin-bottom:16px;box-shadow:4px 4px 0 rgba(20,38,28,.18);overflow:hidden}
.chap>header{grid-template-columns:120px 1fr auto;padding:0 22px 0 0;background:#fffdf6}
.chap .num{font-family:var(--u);font-weight:700;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:#fff;background:var(--acc);align-self:stretch;display:grid;place-items:center;padding:18px 8px;text-align:center}
.chap h3{font-family:var(--d);font-weight:400;font-size:1.5rem;color:var(--ink);padding:16px 0}
.chap .tog{border-radius:999px;border:2px solid var(--money);color:var(--money);font-family:var(--u);font-weight:600}
.chap.open .tog{background:var(--money);color:#fff}
.chap .body{border-top:2px solid var(--ink)}
.lede{font-size:1.18rem}.lede::first-letter{all:unset}
.sec{font-family:var(--u);font-weight:700;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--money)}
.sec::after{background:var(--gold);height:2px}
.ideas li .n{font-family:var(--u);font-weight:700;font-size:.74rem;color:var(--money);background:var(--gold2);border-radius:4px;padding:0 6px;top:3px}
.ideas li b{box-shadow:inset 0 -.38em 0 rgba(241,210,107,.55)}
code{font-family:var(--m);font-size:.86em;background:#efe7cf;padding:1px 5px;border-radius:3px}
.eq{border:1px solid var(--rule);border-left:4px solid var(--gold);background:#fff;border-radius:4px}
.method{border:1px solid var(--rule);background:#fff;border-radius:6px}
.margin{border-left:0;border:2px solid var(--money);background:#eef6ef;border-radius:8px;padding:16px 18px}
.margin .ttl{font-family:var(--u);font-weight:700;color:var(--money);transform:none}
.margin p{font-family:var(--s);font-size:1rem;color:var(--ink);transform:none!important}
.go{border:2px solid var(--money);border-radius:999px;padding:8px 18px;font-family:var(--u);font-weight:600;color:var(--money)}
.go:hover{background:var(--money);color:#fff}
.btn{border-radius:999px;border:2px solid var(--money);font-family:var(--u);font-weight:600;text-transform:none;letter-spacing:0}
.btn:not(.ghost){background:linear-gradient(180deg,#2a8a57,var(--money));color:#fff;box-shadow:0 3px 0 #0e3a22}
.btn.ghost{background:#fff;color:var(--money)}
select{border-radius:999px;border:2px solid var(--money);font-family:var(--u)}
.card{border:2px solid var(--ink);border-radius:8px;box-shadow:6px 6px 0 rgba(20,38,28,.15);background:#fffdf6}
.card::before{display:block;height:6px;background:repeating-linear-gradient(90deg,var(--money) 0 18px,var(--gold) 18px 22px)}
.shead b{font-family:var(--d);font-weight:400;font-size:1.3rem;color:var(--money)}
.blank input{font-family:var(--m);font-size:1.15rem;color:var(--money);border-bottom:2px solid var(--gold);background:#fffbe9}
.feedback{font-family:var(--u)}
.feedback.ok::before{content:"💵 +$100 · "}
.steps li::before{font-family:var(--u);color:var(--money)}
.grade{border-radius:50%;width:150px;height:150px;display:grid;place-items:center;font-family:var(--d);font-weight:400;border:5px double var(--money);color:var(--money);transform:rotate(-8deg);background:#fff}
.sheet{border:2px solid var(--ink);border-radius:8px;background:#fffdf6}
.sheet h4{font-family:var(--u);font-weight:700;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:#fff;background:var(--money);display:inline-block;padding:3px 10px;border-radius:3px;border:0}
.dg{border:1px solid var(--rule);border-radius:8px;background:#fff}
.dg .m{stroke:#cbbf9c}.dg .fw2{fill:#f6f0dc}
.dg figcaption b{color:var(--money)}
.rvhead{border-radius:8px;background:var(--money);color:#fff;border:2px solid var(--gold)}
.rvhead .ttl{color:var(--gold2);font-family:var(--u);letter-spacing:.1em}
.rvhead p{color:#e8f1ea}
.foot{border-top:3px solid var(--gold);background:var(--money);color:#cfe0d3;font-family:var(--u);font-size:.78rem}
.ssec .snum{background:var(--money);border-radius:3px}.exb{border:1px solid var(--rule);border-left:4px solid var(--gold);border-radius:6px;background:#fff}
/* per-course deed colors */
body.t-micro{--acc:#8b4513}body.t-macro{--acc:#5aa9e6}body.t-bcalc{--acc:#d6336c}body.t-bstat{--acc:#f08c00}body.t-facct{--acc:#d6332b}body.t-macct{--acc:#e6b800}body.t-fm{--acc:#1d7a46}body.t-iacct{--acc:#2148b8}body.t-acf{--acc:#7a3cb8}body.t-inv{--acc:#0f8b8d}body.t-deriv{--acc:#c2185b}body.t-intl{--acc:#3d5a80}body.t-fmod{--acc:#2f9e44}body.t-mkts{--acc:#6c757d}body.t-alt{--acc:#b8860b}
/* ===== FLASH: marquee hero on dark felt ===== */
.chero{background:radial-gradient(ellipse at 30% 20%,#1f7a4c 0%,#0f4a2c 45%,#072414 100%);color:#f6efd6;overflow:hidden}
.chero::after{inset:14px;border:0;outline:0;border-radius:14px;
  background:
   radial-gradient(circle,#fff6c2 0 3px,#ffcf3f 4px,transparent 6px) 0 0/28px 28px repeat-x,
   radial-gradient(circle,#fff6c2 0 3px,#ffcf3f 4px,transparent 6px) 0 100%/28px 28px repeat-x,
   radial-gradient(circle,#fff6c2 0 3px,#ffcf3f 4px,transparent 6px) 0 0/28px 28px repeat-y,
   radial-gradient(circle,#fff6c2 0 3px,#ffcf3f 4px,transparent 6px) 100% 0/28px 28px repeat-y;
  filter:drop-shadow(0 0 6px #ffcf3f) drop-shadow(0 0 14px rgba(255,190,40,.6));animation:bulbs 1.1s steps(2) infinite}
@keyframes bulbs{0%{opacity:1}50%{opacity:.55}100%{opacity:1}}
.chero::before{content:"";position:absolute;inset:14px;border-radius:14px;pointer-events:none;
  background:
   radial-gradient(circle,#fff 0 2px,transparent 4px) 14px 0/28px 28px repeat-x,
   radial-gradient(circle,#fff 0 2px,transparent 4px) 14px 100%/28px 28px repeat-x;
  animation:chase .9s steps(2) infinite;opacity:.9}
@keyframes chase{0%{opacity:.95}50%{opacity:0}100%{opacity:.95}}
@media (prefers-reduced-motion:reduce){.chero::after,.chero::before{animation:none}}
.chero h1{color:#ffe08a;text-shadow:0 0 6px rgba(255,214,90,.9),0 0 22px rgba(255,190,40,.55),0 3px 0 #7a5200}
.chero h1::after{background:linear-gradient(90deg,#ffcf3f,#fff3b0,#ffcf3f);box-shadow:0 0 12px #ffcf3f}
.chero .kick{color:#c8f0d4}.chero .kick span:first-child{background:#ffcf3f;color:#0f3b24;box-shadow:0 0 12px rgba(255,207,63,.7)}
.chero p{color:#e6efe2}
.hstats{background:rgba(0,0,0,.35);border:2px solid #ffcf3f;box-shadow:0 0 18px rgba(255,207,63,.35)}
.hstats div{border-right:1px dashed rgba(255,207,63,.35);color:#cfe3d4}
.hstats b{color:#ffe08a;text-shadow:0 0 8px rgba(255,214,90,.6)}
.labbtn{background:#ffcf3f;color:#0f3b24;border-color:#fff3b0}
/* LED tape */
.tape{background:#050806;font-family:'VT323','IBM Plex Mono',monospace;font-size:1.05rem;letter-spacing:.04em;text-shadow:0 0 6px currentColor;
  background-image:radial-gradient(circle,rgba(255,255,255,.05) 1px,transparent 1.5px);background-size:4px 4px}
.tape .up{color:#39ff88}.tape .dn{color:#ff4d5e}.tape span{color:#ffd65a}
/* neon unit labels */
.chap .num{box-shadow:inset -4px 0 0 rgba(0,0,0,.15)}
.chap:hover{transform:translateY(-2px);box-shadow:6px 8px 0 rgba(20,38,28,.2)}
.chap{transition:transform .15s,box-shadow .15s}
.bank{box-shadow:0 0 12px rgba(255,207,63,.5)}
.feedback.ok{color:#1d7a46;font-weight:600}
/* ===== phone layout ===== */
.katex-display{overflow-x:auto;overflow-y:hidden;padding:4px 0;-webkit-overflow-scrolling:touch}
.tabs .wrap{overflow-x:auto;flex-wrap:nowrap;scrollbar-width:none;-webkit-overflow-scrolling:touch}.tabs .wrap::-webkit-scrollbar{display:none}
.tabs button{white-space:nowrap;flex:none}
@media(max-width:700px){
 .chero{padding:44px 0 30px}
 .chero::after,.chero::before{inset:6px}
 .chero .wrap{padding-left:26px;padding-right:26px}
 .chero h1{font-size:2.5rem}
 .chero p{font-size:1rem}
 .hstats{grid-template-columns:1fr 1fr!important}
 .hstats div{border-right:0;border-bottom:1px dashed rgba(255,207,63,.35);padding:10px 12px}
 .chap>header{grid-template-columns:1fr auto;padding:0 12px 0 0}
 .chap .num{grid-column:1/-1;padding:7px 12px;justify-items:start;font-size:.68rem}
 .chap h3{font-size:1.2rem;padding:12px 0 12px 14px;line-height:1.2}
 .chap .tog{padding:6px 12px;font-size:.78rem}
 .chap .prog{display:none}
 .chap .body{padding-left:16px!important;padding-right:16px!important}
 .lablink{margin:10px 12px!important}
 .tabs button{padding:8px 14px;font-size:.82rem}
 input,select,textarea{font-size:16px!important}  /* stop iPhone zoom-on-focus */
 .ans input,.blank input{min-height:40px}
 button{min-height:36px}
}