/* RigTuned. Lab-white spec sheet look: cool paper, navy ink, cobalt for actions, heat orange only for stutter. */
:root{
  --paper:#EEF0F3; --surface:#FFFFFF; --ink:#0E1630; --graphite:#535B6B; --rule:#D3D8E0;
  --cobalt:#2F45FF; --cobalt-deep:#1F31D6; --heat:#FF5A1F; --navy-2:#1A2550;
  --r-lg:20px; --r-md:12px; --r-sm:8px;
  --wrap:1120px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Archivo,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;font-variation-settings:"wdth" 100}
img{max-width:100%;display:block}
a{color:var(--cobalt);text-underline-offset:3px}
a:hover{color:var(--cobalt-deep)}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
h1,h2,h3{font-stretch:118%;font-variation-settings:"wdth" 118;letter-spacing:-.02em;line-height:1.04;margin:0;text-wrap:balance;color:var(--ink)}
h1{font-size:clamp(40px,5.4vw,68px);font-weight:820}
h2{font-size:clamp(30px,3.6vw,44px);font-weight:800}
h3{font-size:20px;font-weight:720;line-height:1.2;letter-spacing:-.01em}
p{margin:0 0 14px;text-wrap:pretty}
.muted{color:var(--graphite)}
.num{font-variant-numeric:tabular-nums}

/* nav */
.top{position:sticky;top:0;z-index:20;background:rgba(238,240,243,.88);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.wordmark{font-weight:850;font-size:21px;letter-spacing:-.02em;color:var(--ink);text-decoration:none;font-variation-settings:"wdth" 125;display:flex;align-items:center;gap:9px}
.wordmark svg{width:24px;height:24px}
.top nav{display:flex;align-items:center;gap:26px}
.top nav a{color:var(--ink);text-decoration:none;font-size:15px;font-weight:500}
.top nav a:hover{color:var(--cobalt)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 26px;border-radius:var(--r-md);background:var(--cobalt);color:#fff;font:inherit;font-weight:700;font-size:17px;text-decoration:none;border:0;cursor:pointer;transition:background-color .15s ease,transform .12s ease;box-shadow:0 1px 0 rgba(255,255,255,.25) inset,0 8px 20px -10px rgba(47,69,255,.7)}
.btn:hover{background:var(--cobalt-deep);color:#fff}
.btn:active{transform:scale(.97)}
.btn.small{min-height:40px;padding:0 16px;font-size:15px;border-radius:10px;box-shadow:none}
.btn.light{background:#fff;color:var(--ink);box-shadow:none}
.btn.light:hover{background:#E4E8FF;color:var(--ink)}
.textlink{font-weight:600;color:var(--ink);text-decoration:underline;text-decoration-color:var(--rule);text-decoration-thickness:2px}
.textlink:hover{text-decoration-color:var(--cobalt);color:var(--ink)}

/* hero */
.hero{padding:64px 0 72px}
.hero .wrap{display:grid;grid-template-columns:1fr 1.08fr;gap:56px;align-items:center}
.hero .lede{font-size:20px;color:var(--graphite);max-width:34em;margin:22px 0 30px}
.hero .actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.facts{list-style:none;padding:0;margin:30px 0 0;display:flex;flex-wrap:wrap;gap:10px}
.facts li{font-size:14px;color:var(--ink);background:var(--surface);border:1px solid var(--rule);border-radius:99px;padding:6px 13px}

/* frame-time graph */
.graph{margin:0;background:var(--surface);border:1px solid var(--rule);border-radius:var(--r-lg);padding:24px 24px 18px;box-shadow:0 30px 60px -40px rgba(14,22,48,.35)}
.graph-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:10px}
.graph-head strong{font-size:15px;font-weight:700}
.legend{display:flex;gap:16px;font-size:13px;color:var(--graphite)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:16px;height:3px;border-radius:2px;display:inline-block}
.graph svg{width:100%;height:auto;display:block;overflow:visible}
.graph figcaption{font-size:13.5px;color:var(--graphite);margin-top:10px;line-height:1.45}
.line-before{fill:none;stroke:var(--heat);stroke-width:2.2;stroke-linejoin:round}
.line-after{fill:none;stroke:var(--cobalt);stroke-width:3;stroke-linejoin:round;stroke-linecap:round}
@media (prefers-reduced-motion:no-preference){
  .line-before{stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 1.3s .2s cubic-bezier(.4,0,.2,1) forwards}
  .line-after{stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 1.1s 1.25s cubic-bezier(.4,0,.2,1) forwards}
  .before-dim{animation:dim .6s 1.4s ease forwards}
}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes dim{to{opacity:.6}}

/* sections */
.band{padding:88px 0;border-top:1px solid var(--rule)}
.band.white{background:var(--surface)}
.section-head{max-width:46em;margin-bottom:40px}
.section-head p{font-size:19px;color:var(--graphite);margin-top:16px}

/* inside the guide */
.pages{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pages figure{margin:0}
.pages img{width:100%;height:auto;aspect-ratio:620/877;object-fit:contain;border-radius:6px;border:1px solid var(--rule);box-shadow:0 22px 40px -28px rgba(14,22,48,.45);background:#fff}
.pages figcaption{font-size:14.5px;margin-top:12px;color:var(--ink);font-weight:600}
.pages figcaption span{display:block;font-weight:400;color:var(--graphite)}
.games{margin-top:48px;padding-top:28px;border-top:1px solid var(--rule);display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:baseline}
.games p{margin:0;font-size:15px;color:var(--graphite)}
.games ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 28px}
.games li{font-size:clamp(20px,2.3vw,28px);font-weight:760;font-variation-settings:"wdth" 116;letter-spacing:-.015em}

/* tips */
.tips{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px}
.tips-intro{position:sticky;top:100px;align-self:start}
ol.steplist{list-style:none;margin:0;padding:0;counter-reset:s}
ol.steplist li{counter-increment:s;display:grid;grid-template-columns:44px 1fr;gap:4px 18px;padding:24px 0;border-top:1px solid var(--rule)}
ol.steplist li:last-child{border-bottom:1px solid var(--rule)}
ol.steplist li::before{content:counter(s);grid-row:span 3;width:36px;height:36px;border-radius:50%;border:1.5px solid var(--ink);display:grid;place-items:center;font-weight:700;font-size:15px;font-variant-numeric:tabular-nums}
ol.steplist h3{margin:5px 0 6px}
ol.steplist p{margin:0;color:var(--graphite)}
.path{display:inline-block;margin-top:10px;font-size:14px;background:var(--paper);border:1px solid var(--rule);border-radius:7px;padding:4px 10px;color:var(--ink);font-weight:500}
.note{margin-top:28px;padding:18px 20px;border-radius:var(--r-md);background:#FFF3EE;border:1px solid #FFD3C2}
.note strong{color:#B33A0C}

/* unlock */
.unlock{background:var(--ink);color:#fff;border-radius:28px;padding:56px;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.unlock h2{color:#fff}
.unlock .sub{color:#C5CBE6;font-size:18px;margin:16px 0 28px}
.files{list-style:none;padding:0;margin:0 0 30px;border-top:1px solid var(--navy-2)}
.files li{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--navy-2);font-size:15.5px}
.files li span:last-child{color:#9AA3C7;font-variant-numeric:tabular-nums;white-space:nowrap}
.how{background:var(--navy-2);border-radius:var(--r-lg);padding:30px}
.how h3{color:#fff;margin-bottom:18px}
.how ol{list-style:none;margin:0 0 26px;padding:0;counter-reset:h}
.how li{counter-increment:h;position:relative;padding:0 0 18px 44px;color:#DCE0F2}
.how li::before{content:counter(h);position:absolute;left:0;top:0;width:28px;height:28px;border-radius:50%;background:var(--cobalt);color:#fff;font-weight:700;font-size:14px;display:grid;place-items:center}
.how li b{color:#fff;display:block}
.how .btn{width:100%}
.how .fine{font-size:13.5px;color:#9AA3C7;margin:16px 0 0;line-height:1.5}
.how .fine a{color:#C9D0FF}
.no-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.no-list li{padding-left:28px;position:relative;color:#DCE0F2;font-size:15.5px}
.no-list li::before{content:"";position:absolute;left:2px;top:9px;width:12px;height:7px;border-left:2px solid #7C8BFF;border-bottom:2px solid #7C8BFF;transform:rotate(-45deg)}

/* faq */
.faq{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px}
.faq details{border-top:1px solid var(--rule);padding:20px 0}
.faq details:last-child{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;font-weight:700;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:20px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:400;font-size:24px;line-height:1;color:var(--graphite);transition:transform .2s ease}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--graphite);margin:12px 0 0;max-width:40em}

/* ads: labelled, small, never near the unlock button */
.ad{margin:0 auto;text-align:center}
.ad:not(:empty){margin:40px auto}
.ad:not(:empty)::before{content:"Advertisement";display:block;font-size:12px;color:#8A92A3;margin-bottom:6px}
.ad-728{display:block}.ad-320{display:none}

/* footer */
footer{border-top:1px solid var(--rule);padding:40px 0 48px;font-size:14px;color:var(--graphite)}
footer .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer nav{display:flex;gap:22px}
footer a{color:var(--ink);text-decoration:none}
footer a:hover{color:var(--cobalt)}
footer p{max-width:46em;margin:0}

/* mobile sticky cta */
.sticky-cta{position:fixed;left:12px;right:12px;bottom:12px;z-index:30;display:none;transform:translateY(130%);transition:transform .25s ease}
.sticky-cta.show{transform:none}
.sticky-cta .btn{width:100%;box-shadow:0 16px 30px -12px rgba(14,22,48,.5)}

/* article pages (guides, privacy, download) */
.post{max-width:760px;margin:0 auto;padding:64px 24px 40px}
.post h1{font-size:clamp(34px,4.6vw,52px)}
.post h2{font-size:26px;margin:44px 0 12px}
.post p,.post li{color:#2B3347}
.post .meta{color:var(--graphite);font-size:15px;margin:16px 0 30px}
.post table{width:100%;border-collapse:collapse;margin:16px 0 22px;font-size:15.5px;background:#fff;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--rule)}
.post th,.post td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--rule);vertical-align:top}
.post th{background:var(--ink);color:#fff;font-weight:600}
.post tr:last-child td{border-bottom:0}
.tip{background:#fff;border:1px solid var(--rule);border-left:4px solid var(--cobalt);border-radius:var(--r-sm);padding:16px 18px;margin:20px 0}
.tip.warn{border-left-color:var(--heat)}
.cta-inline{background:var(--ink);color:#fff;border-radius:var(--r-lg);padding:30px;margin:44px 0}
.cta-inline h3{color:#fff;font-size:24px}
.cta-inline p{color:#C5CBE6;margin:10px 0 20px}
.post .path{margin:0 2px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:24px}
.card{display:block;background:#fff;border:1px solid var(--rule);border-radius:var(--r-lg);padding:24px;text-decoration:none;color:var(--ink);transition:border-color .15s ease}
.card:hover{border-color:var(--cobalt);color:var(--ink)}
.card p{color:var(--graphite);margin:8px 0 0;font-size:15.5px}
.done{max-width:640px;margin:0 auto;padding:80px 24px 40px;text-align:center}
.done .check{width:64px;height:64px;border-radius:50%;background:var(--cobalt);display:grid;place-items:center;margin:0 auto 24px}
.done h1{font-size:clamp(34px,5vw,54px)}
.done .sub{color:var(--graphite);font-size:19px;margin:16px auto 30px}
.dl-list{list-style:none;padding:0;margin:26px auto 0;text-align:left;background:#fff;border:1px solid var(--rule);border-radius:var(--r-lg)}
.dl-list li{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 20px;border-bottom:1px solid var(--rule)}
.dl-list li:last-child{border-bottom:0}
.dl-list span{color:var(--graphite);font-size:14px}

/* responsive */
@media (max-width:980px){
  .hero .wrap,.tips,.faq,.unlock{grid-template-columns:1fr}
  .tips-intro{position:static}
  .pages{grid-template-columns:repeat(2,1fr)}
  .unlock{padding:36px 24px;gap:36px}
}
@media (max-width:640px){
  body{font-size:16px}
  .top nav a:not(.btn){display:none}
  .hero{padding:40px 0 56px}
  .hero .lede{font-size:18px}
  .band{padding:64px 0}
  .games{grid-template-columns:1fr;gap:10px}
  .ad-728{display:none}.ad-320{display:block}
  .sticky-cta{display:block}
  .graph{padding:16px 14px 12px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}