/* ==================================================================
   sudokuki.org — finance calculators
   Shared stylesheet for all calculator pages.
   Load with: <link rel="stylesheet" href="/assets/loan.css">
   ================================================================== */

/* ================= TOKENS ================= */
:root{
  --ink:#101F2E; --ink-soft:#1B3247; --slate:#4E6274; --mute:#8A99A5;
  --paper:#F1F3EE; --card:#FFFFFF; --wash:#FBFCFA; --rule:#D6DCD5;
  --principal:#1F6F6B; --principal-lt:#7FC4BC; --interest:#B45A1E;
  --save:#1F6F6B;
  --display:"Bricolage Grotesque",system-ui,-apple-system,sans-serif;
  --body:"Newsreader",Georgia,serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,monospace;
  --pad:1.15rem;
  --wrap:min(100% - 2*var(--pad), 76rem);
  --tap:44px;
}
@media (min-width:48rem){ :root{ --pad:2rem } }

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:clip}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--body);font-size:clamp(1.05rem,1rem + .3vw,1.18rem);line-height:1.66;
  font-optical-sizing:auto;overflow-x:clip;width:100%;max-width:100%;
  padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right);
  -webkit-font-smoothing:antialiased;
}
@supports not (overflow:clip){ html,body{overflow-x:hidden} }

img{max-width:100%;display:block;height:auto}
a{color:var(--ink);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--principal)}
:focus-visible{outline:2.5px solid var(--principal);outline-offset:3px;border-radius:3px}
.wrap{width:var(--wrap);margin-inline:auto;max-width:100%}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ================= MASTHEAD ================= */
.masthead{border-bottom:1px solid var(--rule);background:var(--paper);position:relative;z-index:5}
.mast-in{display:flex;align-items:center;gap:1rem;min-height:var(--tap);padding:.5rem 0}
.wordmark{font-family:var(--display);font-weight:800;font-size:1.05rem;letter-spacing:-.02em;text-decoration:none;white-space:nowrap}
.wordmark span{color:var(--principal)}
.mast-in nav{margin-left:auto;display:flex;gap:1.1rem;font-family:var(--mono);font-size:.68rem;
  letter-spacing:.09em;text-transform:uppercase;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.mast-in nav::-webkit-scrollbar{display:none}
.mast-in nav a{color:var(--slate);text-decoration:none;padding:.4rem 0;white-space:nowrap}

/* ================= TOP ZONE ================= */
.top{background:var(--ink);border-bottom:3px solid var(--principal);
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.045) 0 1px,transparent 1px 7px);
  padding-bottom:clamp(1.5rem,5vw,2.75rem)}
.top-grid{display:grid;gap:1.5rem}
@media (min-width:64rem){ .top-grid{grid-template-columns:minmax(0,1fr) 300px;gap:2rem;align-items:start} }
.top-grid > *{min-width:0}
.top-main{min-width:0}
.hero{color:var(--paper)}
.hero-in{padding:clamp(1.5rem,5vw,2.75rem) 0 clamp(1.25rem,3.5vw,1.85rem);max-width:56rem}
.eyebrow{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--principal-lt);margin:0 0 .85rem}
.hero h1{font-family:var(--display);font-weight:800;font-size:clamp(1.85rem,1.25rem + 3.4vw,3.5rem);
  line-height:1.06;letter-spacing:-.03em;margin:0 0 .85rem;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--principal-lt)}
.dek{font-size:clamp(1.02rem,.97rem + .45vw,1.28rem);color:#C7D3D9;margin:0 0 1.5rem;max-width:44ch}
.stamp{display:flex;flex-wrap:wrap;gap:.4rem 1.4rem;font-family:var(--mono);font-size:.66rem;
  letter-spacing:.05em;text-transform:uppercase;color:#9FB2BE;border-top:1px solid rgba(255,255,255,.16);padding-top:.9rem}
.stamp b{color:var(--paper);font-weight:500}

/* ================= CALCULATOR SWITCHER =================
   Replaces the old tab bar. These are real links to the other
   calculator pages, so they pass internal link equity. */
.switcher{display:flex;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;
  background:var(--wash);border-bottom:1px solid var(--rule)}
.switcher::-webkit-scrollbar{display:none}
.switcher a{flex:1 0 auto;min-width:5.5rem;min-height:var(--tap);display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--slate);
  text-decoration:none;padding:.85rem .9rem;border-bottom:3px solid transparent;white-space:nowrap;
  transition:color .18s,border-color .18s}
.switcher a:hover{color:var(--ink);background:rgba(31,111,107,.05)}
.switcher a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--principal);background:var(--card);font-weight:600}

/* ================= CALCULATOR ================= */
.calc{background:var(--card);border-radius:4px;overflow:hidden;box-shadow:0 14px 34px rgba(0,0,0,.22);max-width:100%}
.calc-head{padding:1.1rem var(--pad) .25rem}
.calc-head h2{font-family:var(--display);font-weight:800;font-size:1.15rem;margin:0 0 .25rem;letter-spacing:-.02em}
.calc-head p{margin:0;font-size:.84rem;line-height:1.5;color:var(--slate)}

.controls{display:grid;gap:1.25rem;padding:1.1rem var(--pad) 1.35rem}
@media (min-width:44rem){ .controls{grid-template-columns:1fr 1fr} }
.controls > *{min-width:0}
.field.is-hidden{display:none}
.field-top{display:flex;align-items:baseline;justify-content:space-between;gap:.6rem;margin-bottom:.45rem}
.field-top label{font-family:var(--mono);font-size:.64rem;letter-spacing:.11em;text-transform:uppercase;color:var(--slate)}
.field-top .hint{font-family:var(--mono);font-size:.64rem;color:var(--mute)}
.num{display:flex;align-items:center;border:1px solid var(--rule);border-radius:3px;background:var(--wash);overflow:hidden}
.num .sym{font-family:var(--mono);font-size:.9rem;color:var(--slate);padding:0 .1rem 0 .7rem}
.num input{flex:1;min-width:0;border:0;background:none;font-family:var(--mono);font-size:1.05rem;font-weight:600;
  color:var(--ink);padding:.7rem .7rem .7rem .35rem;min-height:var(--tap);width:100%}
.num input:focus{outline:none}
.num:focus-within{border-color:var(--principal);box-shadow:0 0 0 2px rgba(31,111,107,.18)}

input[type=range]{-webkit-appearance:none;appearance:none;width:100%;background:none;margin:.7rem 0 0;height:24px}
input[type=range]::-webkit-slider-runnable-track{height:4px;background:var(--rule);border-radius:2px}
input[type=range]::-moz-range-track{height:4px;background:var(--rule);border-radius:2px}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:24px;height:24px;border-radius:50%;
  background:var(--principal);border:3px solid #fff;box-shadow:0 1px 4px rgba(0,0,0,.28);margin-top:-10px;cursor:pointer}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--principal);
  border:3px solid #fff;box-shadow:0 1px 4px rgba(0,0,0,.28);cursor:pointer}

.chips{display:flex;flex-wrap:wrap;gap:.45rem}
.chip{min-height:var(--tap);padding:.55rem .95rem;border:1px solid var(--rule);background:var(--wash);border-radius:3px;
  font-family:var(--mono);font-size:.82rem;color:var(--slate);cursor:pointer;transition:.15s}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper);font-weight:600}

/* results */
.result{background:var(--ink);color:var(--paper);padding:1.15rem var(--pad)}
.result .big-label{font-family:var(--mono);font-size:.64rem;letter-spacing:.13em;text-transform:uppercase;color:var(--principal-lt);margin:0 0 .2rem}
.result .big{font-family:var(--mono);font-size:clamp(2.1rem,1.4rem + 3.2vw,2.9rem);font-weight:600;letter-spacing:-.03em;line-height:1;margin:0}
.result .big span{font-size:.42em;font-weight:400;color:#9FB2BE;letter-spacing:0}
.breakdown{margin:.9rem 0 0;padding:.85rem 0 0;border-top:1px solid rgba(255,255,255,.16);
  display:grid;gap:.4rem;font-family:var(--mono);font-size:.76rem}
.breakdown div{display:flex;justify-content:space-between;gap:1rem;color:#9FB2BE}
.breakdown b{color:var(--paper);font-weight:500}
.breakdown div.is-hidden{display:none}

.stats{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--rule)}
@media (min-width:44rem){ .stats{grid-template-columns:repeat(4,1fr)} }
.stats > *{min-width:0}
.stat{padding:.85rem var(--pad);border-bottom:1px solid var(--rule)}
.stat:nth-child(odd){border-right:1px solid var(--rule)}
@media (min-width:44rem){ .stat{border-bottom:0;border-right:1px solid var(--rule)!important} .stat:last-child{border-right:0!important} }
.stat dt{font-family:var(--mono);font-size:.62rem;letter-spacing:.11em;text-transform:uppercase;color:var(--slate);margin-bottom:.2rem}
.stat dd{margin:0;font-family:var(--mono);font-size:1.15rem;font-weight:600;letter-spacing:-.02em;overflow-wrap:break-word}
.stat.is-cost dd{color:var(--interest)}

/* amortisation strip */
.strip-wrap{padding:1.15rem var(--pad);background:var(--wash);border-top:1px solid var(--rule)}
.strip-key{display:flex;flex-wrap:wrap;gap:.4rem 1rem;font-family:var(--mono);font-size:.64rem;
  letter-spacing:.06em;text-transform:uppercase;color:var(--slate);margin-bottom:.75rem}
.key{display:inline-flex;align-items:center;gap:.35rem}
.sw{width:.65rem;height:.65rem;flex:none;border-radius:1px}
.sw.i{background:var(--interest)} .sw.p{background:var(--principal)}
.strip{display:flex;gap:2px;height:6.5rem;align-items:stretch}
@media (min-width:44rem){ .strip{height:8.5rem} }
.bar{flex:1 1 0;display:flex;flex-direction:column;min-width:0}
.seg-i{background:var(--interest)} .seg-p{background:var(--principal)}
.seg-i,.seg-p{transition:flex-basis .3s ease}
.axis{display:flex;gap:2px;margin-top:.4rem;font-family:var(--mono);font-size:.58rem;color:var(--mute)}
.axis span{flex:1 1 0;text-align:center;min-width:0;overflow:hidden}
.strip-note{margin:.8rem 0 0;font-size:.84rem;line-height:1.5;color:var(--slate);font-family:var(--body)}
.calc-fine{padding:.85rem var(--pad) 1.1rem;font-family:var(--mono);font-size:.64rem;line-height:1.6;color:var(--mute);border-top:1px solid var(--rule)}

/* ================= EXTRA-PAYMENT BOOSTER =================
   The follow-on tool that sits under the result. */
.booster{border-top:3px solid var(--principal);background:var(--card)}
.booster-head{padding:1.15rem var(--pad) .3rem}
.booster-head h3{font-family:var(--display);font-weight:800;font-size:1.1rem;letter-spacing:-.02em;margin:0 0 .25rem}
.booster-head p{margin:0;font-size:.86rem;line-height:1.5;color:var(--slate)}

.booster-controls{padding:1rem var(--pad) 1.15rem;display:grid;gap:1rem}
@media (min-width:44rem){ .booster-controls{grid-template-columns:1fr 1fr;align-items:end} }
.quick{display:flex;flex-wrap:wrap;gap:.45rem}
.quick button{min-height:var(--tap);padding:.5rem .85rem;border:1px solid var(--rule);background:var(--wash);
  border-radius:3px;font-family:var(--mono);font-size:.8rem;color:var(--slate);cursor:pointer;transition:.15s}
.quick button:hover{border-color:var(--principal);color:var(--ink)}
.quick button[aria-pressed="true"]{background:var(--principal);border-color:var(--principal);color:#fff;font-weight:600}

.payoff{padding:0 var(--pad) 1.2rem}
.payoff-empty{font-size:.9rem;color:var(--slate);margin:0;padding:.2rem 0 .6rem}

.savings{display:grid;gap:.6rem;margin:0 0 1rem}
@media (min-width:34rem){ .savings{grid-template-columns:repeat(3,1fr)} }
.save-card{background:var(--wash);border:1px solid var(--rule);border-left:3px solid var(--save);padding:.8rem .9rem}
.save-card dt{font-family:var(--mono);font-size:.6rem;letter-spacing:.11em;text-transform:uppercase;color:var(--slate);margin-bottom:.15rem}
.save-card dd{margin:0;font-family:var(--mono);font-size:1.3rem;font-weight:600;letter-spacing:-.02em;color:var(--save);overflow-wrap:break-word}
.save-card.is-time dd{color:var(--ink)}

/* side-by-side interest comparison */
.compare{margin:0 0 .9rem}
.compare-row{display:grid;grid-template-columns:5.5rem minmax(0,1fr);gap:.6rem;align-items:center;margin-bottom:.5rem}
.compare-row span{font-family:var(--mono);font-size:.62rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate)}
.compare-bar{height:1.7rem;display:flex;align-items:center;justify-content:flex-end;padding-right:.5rem;
  font-family:var(--mono);font-size:.72rem;font-weight:600;color:#fff;min-width:2.5rem;
  transition:width .35s ease;border-radius:0 2px 2px 0}
.compare-bar.base{background:var(--interest)}
.compare-bar.boost{background:var(--save)}

.booster-note{font-size:.86rem;line-height:1.55;color:var(--slate);margin:0;
  border-top:1px solid var(--rule);padding-top:.9rem}
.booster-note strong{color:var(--ink);font-weight:600}

/* ================= ARTICLE LAYOUT ================= */
.shell{display:grid;gap:2rem;padding:clamp(1.75rem,5vw,3rem) 0 0}
@media (min-width:64rem){ .shell{grid-template-columns:13rem minmax(0,1fr);gap:3.25rem;align-items:start} }
.shell > *{min-width:0}
.rail{font-family:var(--mono);font-size:.72rem;line-height:1.5;max-width:100%}
@media (max-width:63.99rem){ .rail{background:var(--card);border:1px solid var(--rule);border-radius:4px;padding:.35rem 1rem 1rem} }
@media (min-width:64rem){ .rail{position:sticky;top:1.5rem} }
.rail-title{letter-spacing:.14em;text-transform:uppercase;color:var(--slate);border-bottom:1px solid var(--rule);padding:.85rem 0 .5rem;margin:0 0 .8rem}
.rail ol{list-style:none;margin:0;padding:0;counter-reset:toc}
.rail li{counter-increment:toc;margin-bottom:.5rem;display:flex;gap:.55rem}
.rail li::before{content:counter(toc,decimal-leading-zero);color:var(--principal);flex:none}
.rail a{color:var(--slate);text-decoration:none;min-height:1.6rem;display:inline-block}

.article{max-width:40rem;overflow-wrap:break-word}
.article > * + *{margin-top:1.1em}
.article h2{font-family:var(--display);font-weight:800;letter-spacing:-.022em;line-height:1.14;
  font-size:clamp(1.4rem,1.15rem + 1vw,2rem);margin:2.5rem 0 .1rem;scroll-margin-top:1.25rem;text-wrap:balance}
.article h3{font-family:var(--display);font-weight:600;font-size:1.08rem;margin:1.75rem 0 .1rem;letter-spacing:-.01em}
.article p{margin:0;text-align:justify}
.lede{font-size:1.13em;color:var(--ink-soft)}
.article ul,.article ol{padding-left:1.1rem;margin:0}
.article li + li{margin-top:.4rem}
.article strong{font-weight:600}
.mono-num{font-family:var(--mono);font-size:.92em;font-weight:500;white-space:nowrap}
.pull{border-left:3px solid var(--interest);padding:.1rem 0 .1rem 1rem;margin:1.75rem 0;
  font-size:1.14em;line-height:1.45;color:var(--ink-soft)}

.cards{display:grid;gap:.75rem;margin:1.4rem 0}
@media (min-width:44rem){ .cards{grid-template-columns:repeat(3,1fr)} }
.cards > *{min-width:0}
.lender{background:var(--card);border:1px solid var(--rule);border-top:3px solid var(--principal);padding:.95rem 1rem}
.lender h4{font-family:var(--display);font-weight:600;font-size:1rem;margin:0 0 .5rem}
.lender dl{margin:0;font-size:.85rem;line-height:1.5}
.lender dt{font-family:var(--mono);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;color:var(--slate);margin-top:.5rem}
.lender dd{margin:0;color:var(--ink-soft);overflow-wrap:break-word}
.cards-note{font-family:var(--mono);font-size:.66rem;color:var(--mute);margin:0}

.checklist{list-style:none;padding:0;margin:1.35rem 0;border-top:1px solid var(--rule)}
.checklist li{display:flex;gap:.8rem;padding:.8rem 0;border-bottom:1px solid var(--rule);margin:0;font-size:.98em}
.checklist li::before{content:"✓";font-family:var(--mono);color:var(--principal);font-weight:600;flex:none}

.faq{margin:1.35rem 0;border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;list-style:none;padding:.95rem 2rem .95rem 0;position:relative;min-height:var(--tap);
  font-family:var(--display);font-weight:600;font-size:1rem;letter-spacing:-.008em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:.2rem;top:.8rem;font-family:var(--mono);color:var(--principal);font-size:1.15rem}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 0 1rem;font-size:.96rem;color:var(--ink-soft);text-align:left}

/* related calculators block */
.related{margin:2.5rem 0 0;border-top:1px solid var(--rule);padding-top:1.5rem}
.related h2{margin-top:0}
.rel-grid{display:grid;gap:.7rem;margin-top:1rem}
@media (min-width:34rem){ .rel-grid{grid-template-columns:repeat(2,1fr)} }
.rel-grid a{display:block;background:var(--card);border:1px solid var(--rule);border-left:3px solid var(--principal);
  padding:.8rem .95rem;text-decoration:none;transition:border-color .18s}
.rel-grid a:hover{border-left-color:var(--interest)}
.rel-grid b{display:block;font-family:var(--display);font-weight:600;font-size:.98rem;margin-bottom:.1rem}
.rel-grid span{font-size:.84rem;color:var(--slate);line-height:1.45}

/* ================= ADS ================= */
.ad-label{font-family:var(--mono);font-size:.58rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--mute);margin:0 0 .45rem;text-align:center}
.ad{margin:2.25rem 0;text-align:center;min-height:120px;max-width:100%;overflow:hidden}
.ad ins{display:block}
ins.adsbygoogle{max-width:100% !important;overflow:hidden}

.ad-top{background:var(--paper);border-bottom:1px solid var(--rule);padding:.6rem 0 .7rem;max-width:100%;overflow:hidden}
.ad-top .slot{min-height:100px;display:block;max-width:100%;overflow:hidden}
@media (min-width:64rem){ .ad-top .slot{min-height:110px} }

.top-ad{display:none}
@media (min-width:64rem){
  .top-ad{display:block;position:sticky;top:1rem;align-self:start;background:var(--card);border-radius:4px;
    padding-top:.7rem;box-shadow:0 14px 34px rgba(0,0,0,.22);margin-top:clamp(1.5rem,5vw,2.75rem)}
  .top-ad .slot{min-height:600px;display:block;max-width:100%}
}

/* ================= FOOTER ================= */
.disclaimer{border:1px dashed var(--rule);background:var(--wash);padding:1rem 1.1rem;
  font-size:.85rem;line-height:1.55;color:var(--slate);margin-top:2.25rem;text-align:left}
.disclaimer strong{color:var(--ink)}
.site-foot{background:var(--ink);color:#9FB2BE;margin-top:clamp(2.5rem,6vw,4rem);
  padding-bottom:calc(1.5rem + env(safe-area-inset-bottom))}
.foot-in{padding:2rem 0 .5rem;display:flex;flex-wrap:wrap;gap:1rem 2rem;align-items:baseline;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.04em}
.site-foot a{color:#C7D3D9;text-decoration:none;padding:.35rem 0;display:inline-block}
.site-foot a:hover{color:var(--principal-lt)}
.foot-in p{margin:0}
.foot-in nav{margin-left:auto;display:flex;flex-wrap:wrap;gap:.5rem 1.35rem}

/* ================= SMALL SCREENS ================= */
@media (max-width:47.99rem){
  .article p{text-align:left}
  .calc-fine{font-size:.72rem}
  .stat dt,.field-top label,.field-top .hint{font-size:.68rem}
  .breakdown{font-size:.8rem}
  .axis{font-size:.62rem}
  .ad-label{font-size:.62rem}
  .strip-note{font-size:.88rem}
}

/* ==================================================================
   CTA → payoff page, lazy ads, scroll reveal
   ================================================================== */

/* ---- "finish sooner" call to action under the result ---- */
.cta-next{
  display:flex;align-items:center;gap:1rem;text-decoration:none;
  background:var(--ink);color:var(--paper);border-top:3px solid var(--principal);
  padding:1.15rem var(--pad);transition:background .18s;
}
.cta-next:hover{background:#16304a;color:var(--paper)}
.cta-text{flex:1;min-width:0}
.cta-kicker{display:block;font-family:var(--mono);font-size:.64rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--principal-lt);margin-bottom:.3rem}
.cta-main{display:block;font-family:var(--display);font-weight:700;letter-spacing:-.015em;
  font-size:clamp(1.02rem,.95rem + .5vw,1.3rem);line-height:1.25}
.cta-main b{color:var(--principal-lt);font-weight:700}
.cta-arrow{flex:none;width:2.4rem;height:2.4rem;border-radius:50%;background:var(--principal);
  display:flex;align-items:center;justify-content:center;font-size:1.15rem;transition:transform .18s}
.cta-next:hover .cta-arrow{transform:translateX(3px)}

/* ---- payoff page ---- */
.recap{background:var(--wash);border-bottom:1px solid var(--rule);padding:.9rem var(--pad);
  display:flex;flex-wrap:wrap;gap:.45rem .9rem;align-items:center;
  font-family:var(--mono);font-size:.7rem;color:var(--slate)}
.recap b{color:var(--ink);font-weight:600}
.recap .edit{margin-left:auto;color:var(--principal);text-decoration:none;
  letter-spacing:.09em;text-transform:uppercase;font-size:.64rem}
.recap .edit:hover{text-decoration:underline}

.toggle{display:flex;align-items:flex-start;gap:.7rem;padding:.75rem .9rem;background:var(--wash);
  border:1px solid var(--rule);border-radius:3px;cursor:pointer;min-height:var(--tap)}
.toggle input{width:1.15rem;height:1.15rem;margin:.15rem 0 0;accent-color:var(--principal);flex:none}
.toggle span{font-size:.88rem;line-height:1.45;color:var(--ink-soft)}
.toggle span b{display:block;font-family:var(--display);font-weight:600;font-size:.96rem;color:var(--ink);margin-bottom:.1rem}

.balance-chart{display:flex;gap:2px;height:8rem;align-items:flex-end;margin-top:.4rem}
.balance-chart .col{flex:1 1 0;min-width:0;position:relative;display:flex;align-items:flex-end;height:100%}
.balance-chart .b-base{position:absolute;left:0;right:0;bottom:0;background:var(--rule)}
.balance-chart .b-boost{position:absolute;left:0;right:0;bottom:0;background:var(--principal)}

/* ---- lazy ad slots ---- */
.ad .slot{display:block;max-width:100%;overflow:hidden;min-height:100px}
.ad[data-ad-loaded="false"] .slot{background:
  repeating-linear-gradient(45deg,rgba(0,0,0,.015) 0 8px,transparent 8px 16px)}

/* ---- scroll reveal (progressive enhancement only) ---- */
.js .reveal{opacity:0;transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease}
.js .reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
}