:root{--ink:#0e1126;--ink2:#1a1f3f;--ink3:#2b3270;--lime:#d3e512;--lime2:#b9c910;--paper:#f3f5fb;
--ice:#e5eaf8;--card:#fff;--text:#1c2140;--muted:#566083;--coral:#ff5a4f;--line:#d8def0;
--r:14px;--shadow:0 10px 30px rgba(14,17,38,.12);
--font:'Sora',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.7;
min-height:100dvh;display:flex;flex-direction:column}
img,svg{max-width:100%}
a{color:var(--ink3);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--ink)}
h1,h2,h3{font-family:var(--font);line-height:1.2;margin:0 0 .6em;color:var(--ink)}
h1{font-size:1.75rem;font-weight:800;letter-spacing:-.01em}
h2{font-size:1.4rem;font-weight:800}
h3{font-size:1.1rem;font-weight:600}
p{margin:0 0 1em}
ul,ol{margin:0 0 1.1em;padding-left:1.3em}
li{margin-bottom:.35em}
.kn-wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}
.kn-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--lime);z-index:60}
/* masthead */
.kn-head{position:sticky;top:0;z-index:50;background:var(--ink);box-shadow:0 2px 14px rgba(0,0,0,.25)}
.kn-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding-top:10px;padding-bottom:10px}
.kn-bar__logo{display:block;width:132px;line-height:0}
.kn-bar__logo img{display:block;width:100%;height:auto}
.kn-bar__burger{margin-left:auto;width:44px;height:44px;border:1px solid rgba(255,255,255,.25);background:transparent;
border-radius:10px;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:0}
.kn-bar__burger span{display:block;width:20px;height:2px;background:#fff;border-radius:2px;transition:transform .2s,opacity .2s}
.kn-bar__burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.kn-bar__burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.kn-bar__burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.kn-bar__nav{display:none;flex-direction:column;flex:0 0 100%;width:100%;gap:2px;padding:6px 0 12px}
.kn-nav--open{display:flex;flex:0 0 100%;width:100%}
.kn-bar__nav a{color:#e9edff;text-decoration:none;padding:12px 10px;border-radius:8px;font-weight:600;font-size:.98rem;min-height:44px;display:flex;align-items:center}
.kn-bar__nav a:hover,.kn-bar__nav a[aria-current="page"]{background:rgba(255,255,255,.08);color:var(--lime)}
.kn-nav__cta{margin-top:6px;justify-content:center;background:var(--lime);color:var(--ink)!important;font-weight:800!important}
.kn-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 24px;border-radius:999px;
background:var(--lime);color:var(--ink);font-weight:800;text-decoration:none;border:0;cursor:pointer;font-family:var(--font);
font-size:.98rem;box-shadow:0 6px 18px rgba(211,229,18,.28);transition:transform .15s,background .15s}
.kn-btn:hover{background:#e4f633;color:var(--ink);transform:translateY(-1px)}
.kn-bar__cta{display:none}
/* hero */
.kn-hero{background:radial-gradient(1200px 500px at 85% -10%,rgba(211,229,18,.16),transparent 60%),linear-gradient(160deg,var(--ink) 0%,var(--ink2) 60%,var(--ink3) 100%);
color:#e9edff;position:relative;padding:34px 0 0}
.kn-hero h1{color:#fff;margin-bottom:.5em}
.kn-hero__grid{display:grid;grid-template-columns:1fr;gap:26px;align-items:center;padding-bottom:34px}
.kn-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
color:var(--lime);background:rgba(211,229,18,.1);border:1px solid rgba(211,229,18,.35);padding:5px 12px;border-radius:999px;margin-bottom:14px}
.kn-lede{font-size:1.06rem;color:#dfe5ff;margin-bottom:1.2em}
.kn-tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:0;padding:0;list-style:none}
.kn-tiles li{margin:0;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:2px}
.kn-tiles b{font-size:1.25rem;color:var(--lime);line-height:1.2}
.kn-tiles span{font-size:.82rem;color:#c9d2f5}
.kn-ridge{display:block;width:100%;height:56px;margin-top:-1px}
.kn-ridge path{fill:var(--paper)}
.kn-panel{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--r);padding:18px}
.kn-panel h2{color:#fff;font-size:1.05rem;margin-bottom:.8em}
.kn-bars{list-style:none;margin:0;padding:0}
.kn-bars li{display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;margin-bottom:10px;font-size:.88rem}
.kn-bars i{display:block;height:10px;border-radius:6px;background:linear-gradient(90deg,var(--lime),#7fd1ff)}
.kn-bars em{font-style:normal;color:#c9d2f5;white-space:nowrap}
.kn-crumbs{background:var(--ink2);border-top:1px solid rgba(255,255,255,.08)}
.kn-crumbs ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0;padding:10px 0;font-size:.85rem}
.kn-crumbs li{margin:0;color:#aab4de}
.kn-crumbs li+li::before{content:"›";margin-right:6px;color:#6f7bb5}
.kn-crumbs a{color:#dfe5ff;text-decoration:none}
/* sections */
main{flex:1 0 auto;display:block}
.kn-sec{padding:38px 0}
.kn-sec--tint{background:var(--ice)}
.kn-sec--dark{background:linear-gradient(160deg,var(--ink) 0%,var(--ink2) 100%);color:#e9edff}
.kn-sec--dark h2,.kn-sec--dark h3{color:#fff}
.kn-sec--dark a{color:var(--lime)}
.kn-prose{max-width:780px}
.kn-split{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}
.kn-fig{margin:0}
.kn-fig img{display:block;width:100%;height:auto;border-radius:12px;box-shadow:var(--shadow)}
.kn-fig figcaption{font-size:.85rem;color:var(--muted);margin-top:8px}
.kn-herofig{margin:0 0 6px}
.kn-herofig img{display:block;width:100%;height:auto;border-radius:var(--r);box-shadow:var(--shadow)}
.kn-cta{padding:6px 0 4px;text-align:center}
.kn-cta .kn-btn{min-width:220px}
.kn-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:0 4px 14px rgba(14,17,38,.06)}
.kn-cards{display:grid;grid-template-columns:1fr;gap:14px;margin:18px 0}
.kn-card h3{display:flex;align-items:center;gap:10px;margin-bottom:.4em}
.kn-card .kn-ico{color:var(--ink3);flex:0 0 auto}
.kn-card--tier{border-top:4px solid var(--lime)}
.kn-card--tier b{display:block;font-size:1.5rem;color:var(--ink);line-height:1.2}
.kn-card--tier small{display:block;color:var(--muted)}
.kn-badges{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:14px 0 18px}
.kn-badges li{margin:0;padding:7px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-weight:600;font-size:.88rem;color:var(--ink2)}
.kn-note{border-left:5px solid var(--lime);background:#fff;border-radius:0 var(--r) var(--r) 0;padding:14px 18px;margin:18px 0;box-shadow:0 4px 14px rgba(14,17,38,.06)}
.kn-note strong{color:var(--ink)}
.kn-sec--dark .kn-note{background:rgba(255,255,255,.07);color:#e9edff;box-shadow:none}
.kn-sec--dark .kn-note strong{color:#fff}
.kn-steps{list-style:none;counter-reset:s;margin:18px 0;padding:0;display:grid;gap:12px}
.kn-steps li{counter-increment:s;position:relative;margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px 14px 62px;min-height:60px}
.kn-steps li::before{content:counter(s);position:absolute;left:14px;top:12px;width:36px;height:36px;border-radius:50%;background:var(--ink);color:var(--lime);
display:flex;align-items:center;justify-content:center;font-weight:800}
.kn-steps strong{color:var(--ink)}
.kn-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:16px 0;border-radius:12px;border:1px solid var(--line);background:#fff}
.kn-scroll table{border-collapse:collapse;width:100%;min-width:520px;font-size:.92rem}
.kn-scroll th{background:var(--ink);color:#fff;text-align:left;padding:10px 12px;font-weight:600;white-space:nowrap}
.kn-scroll td{padding:10px 12px;border-top:1px solid var(--line);vertical-align:top}
.kn-scroll tr:nth-child(even) td{background:#f7f9ff}
.kn-checks{list-style:none;padding:0}
.kn-checks li{position:relative;padding-left:30px}
.kn-checks li::before{content:"";position:absolute;left:0;top:.45em;width:18px;height:18px;border-radius:50%;background:var(--lime) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m9 16.2-3.5-3.5L4 14.2l5 5L20 8.2 18.6 6.8Z' fill='%230e1126'/%3E%3C/svg%3E") center/14px no-repeat}
/* faq */
.kn-faq{margin:0 0 10px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.kn-faq summary{cursor:pointer;list-style:none;padding:14px 48px 14px 16px;min-height:48px;font-weight:600;color:var(--ink);position:relative}
.kn-faq summary::-webkit-details-marker{display:none}
.kn-faq summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);font-size:1.4rem;color:var(--ink3);font-weight:600}
.kn-faq[open] summary::after{content:"–"}
.kn-faq[open] summary{background:var(--ice)}
.kn-faq div{padding:4px 16px 4px}
/* promo widget */
.kn-promo{display:flex;flex-wrap:wrap;align-items:center;gap:12px;background:var(--ink);color:#e9edff;border-radius:var(--r);padding:14px 16px;margin:18px 0;max-width:640px}
.kn-promo__lbl{font-size:.82rem;color:#b9c3ec;flex:1 1 100%}
.kn-promo__code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.05rem;font-weight:700;letter-spacing:.08em;color:var(--lime);
border:2px dashed var(--lime);border-radius:10px;padding:8px 16px}
.kn-promo__btn{min-height:44px;padding:0 18px;border-radius:999px;border:0;background:var(--lime);color:var(--ink);font-weight:800;cursor:pointer;font-family:var(--font)}
.kn-promo__hint{font-size:.82rem;color:#b9c3ec;flex:1 1 100%}
/* calculator + tabs */
.kn-calc{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px;margin:18px 0;max-width:680px;box-shadow:var(--shadow)}
.kn-calc label{display:block;font-weight:600;margin-bottom:6px}
.kn-calc select,.kn-calc input[type=range]{width:100%}
.kn-calc select{min-height:44px;border-radius:10px;border:1px solid var(--line);padding:0 10px;font-family:var(--font);font-size:1rem;background:#fff}
.kn-calc input[type=range]{accent-color:var(--ink3);min-height:32px}
.kn-calc__out{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}
.kn-calc__out div{background:var(--ice);border-radius:10px;padding:10px 12px}
.kn-calc__out b{display:block;font-size:1.15rem;color:var(--ink)}
.kn-calc__out span{font-size:.8rem;color:var(--muted)}
.kn-tabs{margin:18px 0}
.kn-tabs [role=tablist]{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.kn-tabs [role=tab]{min-height:44px;padding:0 18px;border-radius:999px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:600;font-family:var(--font);color:var(--ink2)}
.kn-tabs [role=tab][aria-selected=true]{background:var(--ink);color:var(--lime);border-color:var(--ink)}
.kn-tabs [role=tabpanel]{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px}
.kn-tabs [role=tabpanel][hidden]{display:none}
/* footer */
.kn-foot{background:var(--ink);color:#c9d2f5;margin-top:auto;padding:36px 0 22px;font-size:.92rem}
.kn-foot__grid{display:grid;grid-template-columns:1fr;gap:24px}
.kn-foot h2{font-size:.9rem;color:#fff;text-transform:uppercase;letter-spacing:.07em;margin-bottom:.8em}
.kn-foot a{color:#c9d2f5;text-decoration:none}
.kn-foot a:hover{color:var(--lime)}
.kn-foot ul{list-style:none;margin:0;padding:0}
.kn-foot li{margin-bottom:.3em}
.kn-foot__logo{display:block;width:150px;margin-bottom:12px}
.kn-age{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;border:2px solid var(--lime);color:var(--lime);font-weight:800;margin-right:10px}
.kn-rg{display:flex;align-items:flex-start;gap:6px}
.kn-legal{border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:16px;font-size:.82rem;color:#97a3d6}
.kn-top{position:fixed;right:16px;bottom:16px;width:46px;height:46px;border-radius:50%;border:0;background:var(--lime);color:var(--ink);font-size:1.3rem;font-weight:800;cursor:pointer;
box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .2s;z-index:55}
.kn-top.kn-show{opacity:1;pointer-events:auto}
.kn-404{padding:60px 0;text-align:center}
@media (min-width:640px){
h1{font-size:2.2rem}h2{font-size:1.65rem}
.kn-cards{grid-template-columns:repeat(2,1fr)}
.kn-tiles{grid-template-columns:repeat(4,1fr)}
.kn-foot__grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
.kn-wrap{padding:0 28px}
.kn-bar__burger{display:none}
.kn-bar__nav{display:flex;flex-direction:row;flex:0 0 auto;width:auto;margin-left:auto;padding:0;gap:2px}
.kn-nav--open{flex:0 0 auto;width:auto}
.kn-bar__nav a{padding:8px 11px;font-size:.92rem;min-height:40px}
.kn-bar__cta{display:inline-flex;min-height:42px;padding:0 18px}
.kn-nav__cta{display:none!important}
.kn-hero__grid{grid-template-columns:1.25fr .85fr;gap:40px}
.kn-split{grid-template-columns:1.05fr .95fr;gap:34px}
.kn-split--flip .kn-fig{order:-1}
.kn-sec{padding:52px 0}
.kn-cards--3{grid-template-columns:repeat(3,1fr)}
.kn-cards--4{grid-template-columns:repeat(4,1fr)}
.kn-foot__grid{grid-template-columns:1.3fr 1fr 1fr 1.2fr}
}
@media (max-width:420px){
.kn-bar__logo{width:120px}
.kn-calc__out{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}