/* CheckMates site: the Open Box look (docs/design/open-box/index.html, P-71..P-75).
   Cream paper for reading, baize-in-walnut for the hero. Brass is for lines and marks, never fills.
   Fonts: Cormorant Garamond + Alegreya Sans, SIL OFL 1.1, bundled (no CDN). No cookies, no trackers, no scripts needed. */
@font-face{font-family:"Cormorant Garamond";font-style:normal;font-weight:500 700;font-display:swap;src:url(fonts/CormorantGaramond-500.woff2) format("woff2")}
@font-face{font-family:"Cormorant Garamond";font-style:italic;font-weight:500;font-display:swap;src:url(fonts/CormorantGaramond-500i.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/AlegreyaSans-400.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/AlegreyaSans-400i.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-style:normal;font-weight:500;font-display:swap;src:url(fonts/AlegreyaSans-500.woff2) format("woff2")}

:root{
  --paper:#f3ead6;--paper2:#ece1c9;--ink:#241811;--ink2:#5a4a3b;--brass:#93682a;--hair:rgba(147,104,42,.35);
  --felt:#1f3b2c;--felt2:#17301f;--cream:#f3e8cf;--mute:#cdbf9c;--brassL:#d6b06a;--walnut:#4a2c19;--walnut2:#5a3520;
  --disp:"Cormorant Garamond","Iowan Old Style",Georgia,serif;--text:"Alegreya Sans","Segoe UI",system-ui,sans-serif;
  --w:1080px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:18px/1.6 var(--text);-webkit-font-smoothing:antialiased}
/* paper grain, drawn once (no image request) */
body::before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.35;z-index:-1;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' seed='5'/%3E%3CfeColorMatrix values='0 0 0 0 .35 0 0 0 0 .3 0 0 0 0 .22 0 0 0 -.6 .3'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)'/%3E%3C/svg%3E")}
a{color:var(--brass);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
a:hover{color:var(--ink)}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 28px}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:12px;background:var(--paper);padding:8px 12px;z-index:9}

/* ---------- header ---------- */
.top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand img{width:40px;height:40px;border-radius:9px;box-shadow:0 0 0 1px rgba(36,24,17,.12),1px 2px 4px -2px rgba(0,0,0,.4)}
.brand span{font:600 22px/1 var(--disp);letter-spacing:.2em;text-transform:uppercase;padding-left:.2em}
.top nav{display:flex;flex-wrap:wrap;gap:4px 22px}
.top nav a{color:var(--ink2);text-decoration:none;font-size:16px;padding:10px 0;border-bottom:1px solid transparent}
.top nav a:hover,.top nav a[aria-current]{color:var(--ink);border-bottom-color:var(--brass)}

/* ---------- the open box (hero) ---------- */
.box{position:relative;border-radius:30px;padding:14px;background:var(--walnut);
  background-image:repeating-linear-gradient(94deg,rgba(255,220,170,.035) 0 3px,rgba(0,0,0,.05) 3px 7px,rgba(255,220,170,.02) 7px 12px);
  box-shadow:inset 0 1px 0 rgba(255,222,170,.18),0 2px 0 rgba(0,0,0,.2),0 30px 50px -28px rgba(40,20,5,.75)}
.baize{position:relative;overflow:hidden;border-radius:20px;background:var(--felt);color:var(--cream);
  box-shadow:inset 0 0 0 1px rgba(214,176,106,.55),inset 1px 2px 6px rgba(0,0,0,.55)}
.baize::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.38;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='f'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' seed='3'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -.9 .55'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23f)'/%3E%3C/svg%3E")}
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:36px;align-items:center;padding:54px 50px 50px}
.hero>*{position:relative}
.lock{display:block;width:100%;max-width:440px;height:auto;margin:0 0 6px -8px}
.lock .flip{transform-box:view-box;transform-origin:200px 81px;transform:rotate(180deg);animation:matesTurn 900ms linear 700ms both}
@keyframes matesTurn{0%{transform:scale(1,1);animation-timing-function:cubic-bezier(.55,0,.8,.35)}50%{transform:scale(1,0)}50.01%{transform:scale(-1,0);animation-timing-function:cubic-bezier(.2,.65,.45,1)}100%{transform:scale(-1,-1)}}
.tag{font:italic 500 clamp(30px,4vw,42px)/1.15 var(--disp);margin:8px 0 14px;color:var(--cream)}
.lede{font-size:19px;color:var(--mute);margin:0 0 28px;max-width:30em}
.ctas{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.cta{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:56px;padding:0 24px;border-radius:14px;text-decoration:none;
  font:600 24px/1 var(--disp);letter-spacing:.015em;transition:transform 70ms ease-out}
.cta svg{width:22px;height:11px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform 180ms cubic-bezier(.3,1.6,.5,1)}
.cta:active{transform:scale(.97)}.cta:hover svg{transform:translateX(3px)}
.cta.ivory{background:#f1e5c8;color:#183223;box-shadow:1px 2px 0 rgba(0,0,0,.16),2px 10px 20px -10px rgba(0,0,0,.7)}
.cta.ivory:hover{color:#183223;background:#f5ebd3}
.cta.line{color:var(--cream);box-shadow:inset 0 0 0 1px rgba(214,176,106,.6);font-size:20px}
.cta.line:hover{color:var(--cream);box-shadow:inset 0 0 0 1px var(--brassL)}
.cta[aria-disabled="true"]{cursor:default}
.soon{display:block;font:500 12px/1 var(--text);letter-spacing:.16em;text-transform:uppercase;color:var(--mute);margin-top:14px}

/* ---------- demo (placeholder film: two phones meet, the board appears, a rook crosses) ---------- */
.demo{margin:0}
.demo .stage{position:relative;aspect-ratio:420/356;border-radius:14px;overflow:hidden;background:#3b2414;
  background-image:repeating-linear-gradient(91deg,rgba(255,220,170,.05) 0 2px,rgba(0,0,0,.06) 2px 6px,rgba(255,220,170,.025) 6px 11px);
  box-shadow:inset 0 0 0 1px rgba(214,176,106,.4),inset 0 2px 10px rgba(0,0,0,.5)}
.demo svg{position:absolute;inset:0;width:100%;height:100%}
.demo figcaption{font-size:14px;color:var(--mute);margin-top:12px;text-align:center}
.ph-top{animation:phTop 9s cubic-bezier(.2,.8,.2,1) infinite}
.ph-bot{animation:phBot 9s cubic-bezier(.2,.8,.2,1) infinite}
.bd{opacity:0;animation:bdIn 9s linear infinite}
.mv{animation:mv 9s cubic-bezier(.45,.05,.35,1) infinite}
.lastmv{opacity:0;animation:last 9s linear infinite}
@keyframes phTop{0%,4%{transform:translateY(-220px)}22%,86%{transform:translateY(0)}96%,100%{transform:translateY(-220px)}}
@keyframes phBot{0%,4%{transform:translateY(220px)}22%,86%{transform:translateY(0)}96%,100%{transform:translateY(220px)}}
@keyframes bdIn{0%,24%{opacity:0}31%,82%{opacity:1}88%,100%{opacity:0}}
@keyframes mv{0%,44%{transform:translate(0,0)}58%,100%{transform:translate(0,-180px)}}
@keyframes last{0%,57%{opacity:0}60%,80%{opacity:1}86%,100%{opacity:0}}

/* ---------- sections on paper ---------- */
main section{padding:76px 0 8px}
.mark{display:flex;align-items:center;gap:16px;font:600 15px/1 var(--disp);letter-spacing:.34em;text-transform:uppercase;color:var(--brass);margin:0 0 18px}
.mark::after{content:"";flex:1;height:1px;background:var(--hair)}
h1,h2,h3{font-family:var(--disp);font-weight:600;color:var(--ink);letter-spacing:.003em}
h1{font-size:clamp(40px,5vw,56px);line-height:1.05;margin:0 0 16px}
h2{font-size:clamp(30px,3.6vw,40px);line-height:1.1;margin:0 0 14px}
h3{font-size:25px;line-height:1.2;margin:0 0 6px}
p{margin:0 0 14px}
.intro{font-size:20px;color:var(--ink2);max-width:36em}
.steps{list-style:none;padding:0;margin:34px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.steps li{position:relative;padding:22px 24px 18px;border-top:1px solid var(--brass)}
.steps .n{display:block;font:italic 500 46px/1 var(--disp);color:var(--brass);margin:-4px 0 12px}
.steps p{color:var(--ink2);font-size:17px}
.steps svg{display:block;width:100%;max-width:220px;height:auto;margin:6px 0 16px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:28px 0 0;border-top:1px solid var(--hair);border-bottom:1px solid var(--hair)}
.facts div{padding:20px 20px 18px;border-left:1px solid var(--hair)}.facts div:first-child{border-left:0;padding-left:0}
.facts dt{font:500 12px/1.2 var(--text);letter-spacing:.16em;text-transform:uppercase;color:var(--brass);margin-bottom:8px}
.facts dd{margin:0;font:600 22px/1.25 var(--disp)}

/* ---------- reading pages (privacy, support, press) ---------- */
.page{max-width:760px;padding-top:40px}
.page h2{margin-top:46px}
.page ul{padding-left:20px}.page li{margin:6px 0}
.updated{font-size:15px;color:var(--ink2)}
.callout{margin:26px 0;padding:18px 22px;border-left:2px solid var(--brass);background:rgba(255,250,238,.55);border-radius:0 8px 8px 0}
.placeholder{margin:30px 0;padding:20px 22px;border:1px dashed var(--brass);border-radius:10px;background:rgba(255,250,238,.4)}
.placeholder .flag{display:inline-block;font:500 11.5px/1 var(--text);letter-spacing:.16em;text-transform:uppercase;color:var(--paper);background:var(--brass);padding:5px 8px;border-radius:2px;margin-bottom:10px}
details{border-top:1px solid var(--hair);padding:4px 0}
details:last-of-type{border-bottom:1px solid var(--hair)}
summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:56px;font:600 23px/1.25 var(--disp)}
summary::-webkit-details-marker{display:none}
summary::after{content:"";flex:none;width:9px;height:9px;border-right:1.5px solid var(--brass);border-bottom:1.5px solid var(--brass);transform:rotate(45deg);margin-top:-4px;transition:transform 180ms ease}
details[open] summary::after{transform:rotate(225deg);margin-top:4px}
details>div{padding:0 0 16px;color:var(--ink2)}
.dl{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:22px;margin:20px 0}
.dl figure{margin:0}
.dl .tile{display:flex;align-items:center;justify-content:center;aspect-ratio:4/3;border-radius:10px;padding:18px;box-shadow:inset 0 0 0 1px var(--hair)}
.dl .tile.c{background:#f3ead6}.dl .tile.f{background:var(--felt)}.dl .tile.k{background:#fffaf0}
.dl .tile img{max-width:100%;max-height:100%}
.dl figcaption{font-size:15px;margin-top:8px;color:var(--ink2)}
.shots{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:20px 0}
.shots div{aspect-ratio:2868/1320;border-radius:10px;border:1px dashed var(--brass);display:flex;align-items:center;justify-content:center;text-align:center;padding:10px;font-size:14px;color:var(--ink2);background:rgba(255,250,238,.4)}
.copy{white-space:pre-wrap;font:16px/1.55 var(--text);background:rgba(255,250,238,.6);border:1px solid var(--hair);border-radius:8px;padding:16px 18px}
table.kv{border-collapse:collapse;width:100%;font-size:17px}
table.kv th,table.kv td{text-align:left;vertical-align:top;padding:10px 12px 10px 0;border-bottom:1px solid var(--hair)}
table.kv th{font-weight:500;color:var(--brass);width:34%}

/* ---------- footer ---------- */
footer.foot{margin-top:90px;padding:30px 0 46px;border-top:1px solid var(--hair);font-size:15px;color:var(--ink2)}
footer.foot .row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 30px}
footer.foot nav{display:flex;flex-wrap:wrap;gap:6px 20px}
footer.foot a{color:var(--ink2)}
footer.foot small{display:block;margin-top:14px;font-size:13.5px;line-height:1.5}

@media (max-width:860px){
  .hero{grid-template-columns:1fr;padding:38px 24px 30px;gap:30px}
  .steps{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr 1fr}.facts div:nth-child(3){border-left:0;padding-left:0}.facts div{border-top:1px solid var(--hair)}
  .shots{grid-template-columns:1fr}
  .top{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){.wrap{padding:0 16px}.box{padding:9px;border-radius:24px}.baize{border-radius:16px}body{font-size:17px}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}
  .bd{opacity:1}.lastmv{opacity:1}.mv{transform:translate(0,-180px)}}