/* GammaFlow — site styles */
:root{
  --paper:#e8edf0;      /* cool chart paper */
  --sheet:#f4f7f8;      /* raised surfaces */
  --ink:#13213a;        /* deep navy ink */
  --ink-2:#4a5870;      /* secondary text */
  --rule:#c9d3da;       /* grid and rules */
  --up:#0d7f57;         /* advancing */
  --down:#b8402b;       /* declining */
  --saffron:#f2a900;    /* calls to action */
  --focus:#2f5bd3;
  --wide:"Archivo",system-ui,sans-serif;
  --body:"Archivo",system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0f1726;--sheet:#152035;--ink:#e6ecf3;--ink-2:#9aa8bc;--rule:#26344d;
    --up:#2fbf86;--down:#ef6a52;--saffron:#f5b625;--focus:#7aa2ff;
  }
}
:root[data-theme="dark"]{
  --paper:#0f1726;--sheet:#152035;--ink:#e6ecf3;--ink-2:#9aa8bc;--rule:#26344d;
  --up:#2fbf86;--down:#ef6a52;--saffron:#f5b625;--focus:#7aa2ff;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--body);font-variant-numeric:tabular-nums;
  background-image:linear-gradient(var(--rule) 1px,transparent 1px),linear-gradient(90deg,var(--rule) 1px,transparent 1px);
  background-size:100% 32px,32px 100%;background-attachment:fixed;background-blend-mode:normal}
body::before{content:"";position:fixed;inset:0;background:var(--paper);opacity:.86;z-index:-1;pointer-events:none}
a{color:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:4px}
.wrap{width:min(1160px,100% - 32px);margin-inline:auto}

/* nav */
.nav{display:flex;align-items:center;gap:28px;padding:20px 0}
.brand{font:800 22px/1 var(--wide);font-stretch:125%;letter-spacing:-.01em;text-decoration:none;display:flex;align-items:center;gap:10px}
.brand svg{flex:none}
.nav ul{display:flex;gap:24px;list-style:none;margin-left:auto}
.nav ul a{text-decoration:none;color:var(--ink-2);font-size:15px}
.nav ul a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:700 16px/1 var(--body);text-decoration:none;
  padding:15px 22px;border-radius:8px;border:2px solid var(--ink);cursor:pointer;background:transparent;color:var(--ink)}
.btn.primary{background:var(--saffron);border-color:var(--saffron);color:#13213a}
.btn.primary:hover{filter:brightness(1.05)}
.btn.small{padding:10px 14px;font-size:14px}
.btn:hover{background:var(--ink);color:var(--paper)}
.btn.primary:hover{background:var(--saffron);color:#13213a}

/* hero */
.hero{padding:48px 0 24px}
.hero h1{font:800 clamp(40px,6.4vw,82px)/.98 var(--wide);font-stretch:125%;letter-spacing:-.025em;max-width:13ch}
.hero p.lede{margin-top:22px;font-size:20px;color:var(--ink-2);max-width:56ch}
.ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.plot{margin-top:44px;background:var(--sheet);border:1px solid var(--rule);border-radius:14px;padding:18px 18px 10px;position:relative}
.plot canvas{display:block;width:100%;height:clamp(260px,38vw,430px)}
.plot .read{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:6px}
.plot .read .t{font-size:14px;color:var(--ink-2)}
.tally{display:flex;gap:22px;font:800 30px/1 var(--wide);font-stretch:125%}
.tally span small{display:block;font:500 13px/1.3 var(--body);font-stretch:100%;color:var(--ink-2);margin-bottom:4px}
.tally .u{color:var(--up)}.tally .d{color:var(--down)}
.note{font-size:13px;color:var(--ink-2);margin-top:6px}

/* sections */
section{padding:88px 0 0}
h2{font:800 clamp(30px,3.8vw,46px)/1.05 var(--wide);font-stretch:118%;letter-spacing:-.02em;max-width:22ch}
.intro{margin-top:14px;color:var(--ink-2);max-width:60ch;font-size:18px}

.features{margin-top:40px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 56px}
.features div{padding:22px 0 24px;border-top:2px solid var(--ink)}
.features h3{font:700 20px/1.25 var(--body);margin-bottom:8px}
.features p{color:var(--ink-2);font-size:16.5px;max-width:52ch}
.features .k{display:inline-block;font-weight:700}
.k.up{color:var(--up)}.k.down{color:var(--down)}

.steps{margin-top:40px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;counter-reset:s;list-style:none}
.steps li{counter-increment:s}
.steps li::before{content:counter(s);display:block;font:800 64px/1 var(--wide);font-stretch:125%;color:var(--saffron);-webkit-text-stroke:1.5px var(--ink);margin-bottom:12px}
.steps h3{font:700 20px/1.3 var(--body);margin-bottom:6px}
.steps p{color:var(--ink-2);font-size:16.5px}

.plans{margin-top:40px;display:grid;grid-template-columns:1fr 1.25fr;gap:20px;align-items:stretch}
.plan{background:var(--sheet);border:1px solid var(--rule);border-radius:14px;padding:30px;display:flex;flex-direction:column}
.plan.main{border:2px solid var(--ink)}
.plan h3{font:700 20px/1.3 var(--body)}
.plan .price{font:800 clamp(48px,6vw,72px)/1 var(--wide);font-stretch:125%;letter-spacing:-.02em;margin:18px 0 4px}
.plan .per{color:var(--ink-2);font-size:15px}
.plan ul{list-style:none;margin:22px 0 28px;display:grid;gap:10px}
.plan li{padding-left:24px;position:relative;font-size:16px}
.plan li::before{content:"";position:absolute;left:0;top:.62em;width:12px;height:2px;background:var(--up)}
.plan .btn{margin-top:auto;width:100%}
.fine{margin-top:14px;font-size:14px;color:var(--ink-2)}

.ledger{margin-top:36px;display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--rule);border-radius:14px;overflow:hidden;background:var(--sheet)}
.ledger div{padding:26px 28px}
.ledger div+div{border-left:1px solid var(--rule)}
.ledger h3{font:700 19px/1.3 var(--body);margin-bottom:12px;display:flex;align-items:center;gap:10px}
.ledger h3 i{width:12px;height:12px;border-radius:3px;display:inline-block}
.ledger ul{list-style:none;display:grid;gap:8px;color:var(--ink-2);font-size:16px}

.faq{margin-top:28px;max-width:820px}
.faq details{border-top:1px solid var(--rule);padding:18px 0}
.faq details:last-child{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;font:700 18px/1.4 var(--body);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 26px/1 var(--wide);color:var(--ink-2)}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:10px;color:var(--ink-2);max-width:68ch}

.cta-band{margin-top:96px;padding:48px;border-radius:16px;background:var(--ink);color:var(--paper);display:flex;gap:28px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band h2{color:var(--paper);max-width:18ch}
.cta-band .btn{border-color:var(--saffron)}

footer{margin-top:72px;padding:36px 0 48px;border-top:1px solid var(--rule);color:var(--ink-2);font-size:14px}
footer .row{display:flex;gap:24px;flex-wrap:wrap;justify-content:space-between}
footer nav{display:flex;gap:18px;flex-wrap:wrap}
footer nav a{text-decoration:none}footer nav a:hover{color:var(--ink);text-decoration:underline}
footer .disc{margin-top:22px;max-width:90ch;line-height:1.55}

/* policy pages */
.doc{max-width:760px;padding:24px 0 40px}
.doc h1{font:800 clamp(34px,4.6vw,54px)/1.05 var(--wide);font-stretch:120%;letter-spacing:-.02em;margin:24px 0 8px}
.doc .upd{color:var(--ink-2);font-size:15px;margin-bottom:28px}
.doc h2{font:700 22px/1.3 var(--body);font-stretch:100%;letter-spacing:0;margin:30px 0 8px;max-width:none}
.doc p,.doc li{color:var(--ink);font-size:16.5px}
.doc ul{padding-left:22px;display:grid;gap:6px;margin:8px 0}
.ph{background:rgba(242,169,0,.22);padding:0 4px;border-radius:3px}

@media (max-width:860px){
  .nav ul{display:none}
  .features{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:26px}
  .plans{grid-template-columns:1fr}
  .ledger{grid-template-columns:1fr}.ledger div+div{border-left:0;border-top:1px solid var(--rule)}
  .cta-band{padding:32px 24px}
  section{padding-top:64px}
}