/* 67858.com — Number & Money Lab | design system */
:root{
  --ink:#0d1321; --ink-2:#1d2433; --paper:#f7f6f2; --card:#ffffff; --line:#e4e1d8;
  --text:#1a1f2b; --muted:#5d6475; --gold:#e8a317; --gold-d:#b97f07; --teal:#0f9d8a;
  --teal-d:#0a7a6b; --rose:#d9485f; --sky:#2f6fed; --ok:#16a34a;
  --radius:16px; --radius-s:10px; --shadow:0 1px 2px rgba(13,19,33,.06),0 8px 24px rgba(13,19,33,.07);
  --font:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --display:'Sora','Inter',system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,Consolas,monospace;
  --max:1180px;
}
:root[data-theme="dark"]{
  --paper:#0b0f19; --card:#121826; --line:#232b3b; --text:#e8ebf2; --muted:#9aa3b5; --ink-2:#1a2132;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0b0f19; --card:#121826; --line:#232b3b; --text:#e8ebf2; --muted:#9aa3b5; --ink-2:#1a2132;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font:16px/1.65 var(--font);overflow-x:hidden}
img,svg,video,iframe{max-width:100%}
a{color:var(--teal-d)}
:root[data-theme="dark"] a{color:#3fd1bc}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) a{color:#3fd1bc}}
h1,h2,h3,h4{font-family:var(--display);line-height:1.2;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.6vw,3.4rem)} h2{font-size:clamp(1.5rem,3vw,2.1rem)} h3{font-size:1.2rem}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;z-index:99;background:#fff;padding:8px}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
.center{text-align:center}

/* Top interest bar (every page) */
.topbar{background:var(--gold);color:#1b1300;font-size:.88rem;font-weight:600;text-align:center;padding:7px 12px}
.topbar a{color:#1b1300;text-decoration:underline;text-underline-offset:3px}

/* Header */
.site-head{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:16px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-family:var(--display);font-weight:800;font-size:1.25rem}
.brand .logo{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--ink);color:var(--gold);font-size:.78rem;letter-spacing:-.04em}
.brand small{display:block;font-family:var(--font);font-weight:500;font-size:.72rem;color:var(--muted);letter-spacing:.02em}
.menu{display:flex;gap:4px;margin-left:auto;list-style:none;padding:0;margin-top:0;margin-bottom:0}
.menu a{display:block;padding:8px 11px;border-radius:8px;text-decoration:none;color:var(--text);font-weight:500;font-size:.95rem}
.menu a:hover,.menu a[aria-current="page"]{background:var(--ink-2);color:#fff}
.menu .cta{background:var(--teal);color:#fff}
.menu .cta:hover{background:var(--teal-d)}
.icon-btn{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:10px;width:40px;height:40px;cursor:pointer;font-size:1.1rem}
.burger{display:none}
@media (max-width:980px){
  .burger{display:inline-block;margin-left:auto}
  .menu{display:none;position:absolute;left:0;right:0;top:64px;flex-direction:column;background:var(--card);border-bottom:1px solid var(--line);padding:10px 16px;box-shadow:var(--shadow)}
  .menu.open{display:flex}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:12px;border:0;font:600 1rem var(--font);cursor:pointer;text-decoration:none;transition:transform .12s,box-shadow .12s,background .12s}
.btn:hover{transform:translateY(-1px)}
.btn-gold{background:var(--gold);color:#1b1300}.btn-gold:hover{background:#f2b232}
.btn-teal{background:var(--teal);color:#fff!important}.btn-teal:hover{background:var(--teal-d)}
.btn-ghost{background:transparent;color:var(--text)!important;border:1.5px solid var(--line)}
.btn-dark{background:var(--ink);color:#fff!important}
.btn-block{width:100%}

/* Hero */
.hero{background:radial-gradient(1200px 400px at 85% -10%,rgba(232,163,23,.25),transparent 60%),radial-gradient(900px 380px at 0% 110%,rgba(15,157,138,.22),transparent 60%),var(--ink);color:#fff;padding:64px 0 56px}
.hero p.lead{font-size:1.15rem;color:#c9cfdb;max-width:640px}
.hero .eyebrow{display:inline-block;font:600 .8rem var(--mono);letter-spacing:.12em;color:var(--gold);text-transform:uppercase;margin-bottom:14px}
.hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center}
@media (max-width:880px){.hero-grid{grid-template-columns:1fr}}
.digits{display:flex;gap:8px;flex-wrap:wrap}
.digit{width:clamp(48px,9vw,72px);aspect-ratio:3/4;border-radius:14px;background:#151c2c;border:1px solid #2a3348;display:grid;place-items:center;font:800 clamp(1.8rem,5vw,2.8rem) var(--display);color:#fff;position:relative}
.digit.g{color:var(--gold)} .digit.t{color:#3fd1bc}
.digit span{position:absolute;bottom:6px;font:500 .6rem var(--mono);color:#8a93a8;letter-spacing:.05em}
.hero-search{display:flex;gap:8px;margin-top:22px;max-width:560px}
.hero-search input{flex:1;min-width:0;padding:14px 16px;border-radius:12px;border:1px solid #2a3348;background:#111827;color:#fff;font-size:1rem}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px}
.stat{background:#121a2a;border:1px solid #232c40;border-radius:12px;padding:12px}
.stat b{display:block;font:800 1.5rem var(--display);color:var(--gold)}
.stat small{color:#9aa3b5}
@media (max-width:600px){.stats{grid-template-columns:repeat(2,1fr)}}

/* Sections & cards */
section{padding:56px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.section-head p{color:var(--muted);margin:0;max-width:620px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:980px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
a.card{text-decoration:none;color:var(--text);display:block;transition:transform .15s,border-color .15s}
a.card:hover{transform:translateY(-3px);border-color:var(--teal)}
.card .tag{display:inline-block;font:600 .72rem var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--teal-d);background:rgba(15,157,138,.1);padding:3px 8px;border-radius:6px;margin-bottom:10px}
.card h3{margin-bottom:6px}
.card p{color:var(--muted);margin:0;font-size:.95rem}
.ico{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:rgba(232,163,23,.14);font-size:1.3rem;margin-bottom:12px}
.band{background:var(--ink);color:#fff}
.band .card{background:#121a2a;border-color:#232c40;color:#fff}
.band .card p{color:#b9c0cf}
.alt{background:color-mix(in srgb,var(--line) 35%,var(--paper))}

/* Filter chips & search */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 20px}
.chip{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:999px;padding:7px 14px;font:500 .9rem var(--font);cursor:pointer}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.search{width:100%;padding:14px 16px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--text);font-size:1rem}

/* Calculator layout */
.crumbs{font-size:.88rem;color:var(--muted);padding:18px 0 0}
.crumbs a{color:var(--muted)}
.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start;padding:20px 0 48px}
@media (max-width:980px){.calc-layout{grid-template-columns:minmax(0,1fr)}}
.calc-layout>*{min-width:0}
.plan-grid{grid-template-columns:1.4fr 1fr}@media (max-width:880px){.plan-grid{grid-template-columns:minmax(0,1fr)}}
.grid>*{min-width:0}
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.calc-in{padding:22px;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media (max-width:560px){.calc-in{grid-template-columns:1fr}}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px}
.field .inp{display:flex;align-items:center;border:1.5px solid var(--line);border-radius:10px;background:var(--paper);overflow:hidden}
.field .inp:focus-within{border-color:var(--teal)}
.field .inp span{padding:0 10px;color:var(--muted);font-weight:600}
.field input,.field select{flex:1;min-width:0;border:0;background:transparent;color:var(--text);padding:12px;font:500 1rem var(--font);outline:none}
.field select{width:100%}
.field small{color:var(--muted);font-size:.8rem}
.calc-out{background:var(--ink);color:#fff;padding:22px}
.results{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}
.res{background:#151c2c;border:1px solid #273048;border-radius:12px;padding:14px}
.res small{color:#9aa3b5;display:block;font-size:.8rem}
.res b{font:800 1.45rem var(--display);color:#fff;word-break:break-word}
.res.main b{color:var(--gold);font-size:1.8rem}
.chart{margin-top:16px;background:#111827;border-radius:12px;padding:12px}
.calc-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.calc-actions .btn{padding:9px 14px;font-size:.9rem}
.side{position:sticky;top:84px;display:grid;gap:16px}
.prose{max-width:760px}
.prose h2{margin-top:1.6em}
.prose table{display:block;overflow-x:auto;width:100%;border-collapse:collapse;margin:1em 0;font-size:.95rem}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.prose code,.formula{font-family:var(--mono);background:color-mix(in srgb,var(--line) 50%,transparent);padding:2px 6px;border-radius:6px}
.formula{display:block;padding:12px 14px;margin:10px 0;overflow-x:auto;white-space:pre}
.callout{border-left:4px solid var(--gold);background:rgba(232,163,23,.08);padding:14px 16px;border-radius:0 12px 12px 0;margin:1.2em 0}
details.faq{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--card);margin-bottom:10px}
details.faq summary{cursor:pointer;font-weight:600}
.meta{font-size:.85rem;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap;margin-bottom:12px}

/* Forms */
form .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:560px){form .row{grid-template-columns:1fr}}
.f{margin-bottom:12px}
.f label{display:block;font-weight:600;font-size:.9rem;margin-bottom:5px}
.f input,.f select,.f textarea{width:100%;padding:12px 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--paper);color:var(--text);font:1rem var(--font)}
.f input:focus,.f select:focus,.f textarea:focus{outline:none;border-color:var(--teal)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.88rem;color:var(--muted);margin:10px 0}
.check input{margin-top:4px}
.hp{position:absolute!important;left:-5000px!important;height:0;overflow:hidden}
.form-msg{margin-top:10px;font-weight:600}
.form-msg.ok{color:var(--ok)}.form-msg.err{color:var(--rose)}

/* Lead funnel */
.funnel{max-width:720px;margin:0 auto}
.progress{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:18px}
.progress i{display:block;height:100%;width:20%;background:linear-gradient(90deg,var(--teal),var(--gold));transition:width .3s}
.step{display:none}.step.on{display:block;animation:fade .25s}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.opts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0}
@media (max-width:560px){.opts{grid-template-columns:1fr}}
.opt{display:flex;gap:10px;align-items:center;border:1.5px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;background:var(--card);font-weight:500}
.opt:has(input:checked){border-color:var(--teal);background:rgba(15,157,138,.08)}
.opt input{accent-color:var(--teal)}
.steps-nav{display:flex;justify-content:space-between;gap:10px;margin-top:10px}
.trust{display:flex;gap:16px;flex-wrap:wrap;font-size:.85rem;color:var(--muted);margin-top:14px}

/* Donate tiers */
.tier{text-align:center}
.tier .amt{font:800 2.2rem var(--display);color:var(--gold-d)}
.tier.pop{border:2px solid var(--gold);position:relative}
.tier.pop:before{content:'Most chosen';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--gold);color:#1b1300;font:700 .72rem var(--mono);padding:3px 10px;border-radius:99px}
.alloc{display:grid;gap:8px}
.bar{height:10px;border-radius:99px;background:var(--line);overflow:hidden}.bar i{display:block;height:100%;background:var(--teal)}

/* Video */
.video{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#000;cursor:pointer}
.video img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:opacity .2s}
.video:hover img{opacity:1}
.video .play{position:absolute;inset:0;display:grid;place-items:center}
.video .play i{width:64px;height:64px;border-radius:50%;background:rgba(232,163,23,.95);display:grid;place-items:center;font-style:normal;font-size:1.5rem;color:#1b1300}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* Number lab */
.lab-in{display:flex;gap:10px;flex-wrap:wrap}
.lab-in input{flex:1;min-width:200px;font:700 1.6rem var(--mono);padding:14px 18px;border-radius:14px;border:2px solid var(--line);background:var(--card);color:var(--text);letter-spacing:.08em}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.95rem}
.kv dt{color:var(--muted)}.kv dd{margin:0;font-weight:600;word-break:break-word}
.digit-row{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.dchip{border-radius:12px;padding:10px 12px;border:1px solid var(--line);background:var(--card);min-width:110px}
.dchip b{font:800 1.6rem var(--display);display:block}
.dchip small{color:var(--muted)}
.score{font:800 3rem var(--display);color:var(--gold-d)}

/* Footer */
.site-foot{background:var(--ink);color:#b9c0cf;padding:48px 0 24px;margin-top:40px}
.site-foot a{color:#dfe4ee;text-decoration:none}
.site-foot a:hover{color:var(--gold)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:24px}
@media (max-width:880px){.foot-grid{grid-template-columns:1fr 1fr}}
.site-foot h4{color:#fff;font-size:.95rem}
.site-foot ul{list-style:none;padding:0;margin:0;display:grid;gap:6px;font-size:.92rem}
.legal{border-top:1px solid #232c40;margin-top:28px;padding-top:18px;font-size:.82rem;color:#8a93a8}

/* Consent + sticky CTA + modal */
.consent{position:fixed;left:16px;right:16px;bottom:16px;z-index:80;max-width:720px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:16px;display:none;gap:12px;align-items:center;flex-wrap:wrap}
.consent.show{display:flex}
.consent p{margin:0;flex:1;min-width:240px;font-size:.9rem}
.sticky-cta{position:fixed;right:16px;bottom:16px;z-index:60;display:none}
.sticky-cta.show{display:block}
.modal{position:fixed;inset:0;z-index:90;background:rgba(5,8,15,.6);display:none;place-items:center;padding:16px}
.modal.show{display:grid}
.modal .card{max-width:480px;width:100%;position:relative}
.modal .x{position:absolute;right:10px;top:8px;border:0;background:none;font-size:1.5rem;cursor:pointer;color:var(--text)}
.ad-note{font:500 .7rem var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.1em}