/* briss.app — one page, no dependencies. Fonts are self-hosted (SIL OFL). */
@font-face{font-family:Fraunces;src:url(assets/fonts/fraunces-latin-opsz-normal.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:Fraunces;src:url(assets/fonts/fraunces-latin-opsz-italic.woff2) format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(assets/fonts/jetbrains-mono-latin-wght-normal.woff2) format("woff2");font-weight:100 800;font-display:swap}

:root{
  --bg:#0b0b0e; --bg2:#111115; --card:#15151a; --line:#26262e; --line2:#34343f;
  --text:#edebe4; --muted:#a09ea8; --faint:#6f6d78;
  --blue:#4c8dff; --blue2:#8db6ff; --green:#3ecf8e; --red:#e5484d; --paper:#ece5d3; --ink:#1d1a16;
  --serif:Fraunces,"Iowan Old Style","Palatino Linotype",Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --w:1160px; --pad:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.6,.05,.2,1);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue2);text-underline-offset:3px}
a:hover{color:#fff}
h1,h2,h3,p,figure,ol,ul,pre{margin:0}
ol,ul{padding:0;list-style:none}
.mono,code,pre{font-family:var(--mono);font-size:.9em}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;background:var(--blue);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{top:12px}
:focus-visible{outline:2px solid var(--blue2);outline-offset:3px;border-radius:6px}
section{padding:clamp(64px,10vw,128px) var(--pad) 0;max-width:calc(var(--w) + 2*var(--pad));margin:0 auto}

/* nav */
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;padding:12px var(--pad);
  background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent}
.nav nav{display:flex;gap:26px;margin-left:auto}
.nav nav a{color:var(--muted);text-decoration:none;font-size:15px}
.nav nav a:hover{color:var(--text)}
.brand{font:700 22px/1 var(--sans);letter-spacing:-.02em;color:var(--text);text-decoration:none;display:inline-flex;align-items:baseline;gap:5px}
.brand i{width:7px;height:7px;border-radius:50%;background:var(--blue);display:block}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border-radius:999px;background:var(--text);color:#0b0b0e;
  font-weight:600;font-size:16px;text-decoration:none;border:1px solid transparent;transition:transform .15s,background .15s}
.btn:hover{background:#fff;color:#000;transform:translateY(-1px)}
.btn.small{min-height:38px;padding:0 18px;font-size:14px}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line2)}
.btn.ghost:hover{background:var(--card);color:#fff}
@media (max-width:720px){.nav nav{display:none}.nav .btn{margin-left:auto}}

/* hero */
.hero{text-align:center;padding-top:clamp(40px,6vw,72px)}
.eyebrow{color:var(--muted);font-size:14px;display:flex;gap:10px;justify-content:center;align-items:center;flex-wrap:wrap}
.tag{color:var(--blue2);border:1px solid color-mix(in srgb,var(--blue) 50%,transparent);border-radius:999px;padding:2px 10px;font:500 12px/1.6 var(--mono)}
h1{font:400 clamp(44px,8.4vw,104px)/.98 var(--serif);letter-spacing:-.035em;margin:22px auto 0;max-width:12ch;font-variation-settings:"opsz" 144;text-wrap:balance}
h1 em{font-style:italic;color:var(--paper)}
.lede{color:var(--muted);font-size:clamp(17px,2vw,20px);max-width:60ch;margin:26px auto 0;text-wrap:pretty}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:32px}

/* the stage */
.demo{padding-top:clamp(40px,6vw,72px)}
.stage-wrap{max-width:1040px;margin:0 auto}
.stage{position:relative;aspect-ratio:2200/1560;container-type:size;overflow:hidden;border-radius:clamp(10px,1.6vw,20px);background:#0e0e11;
  border:1px solid var(--line);box-shadow:0 40px 120px -40px rgba(76,141,255,.28),0 20px 60px -20px #000;
  --d:.9s;
  /* crop rectangles Briss found on this sheet (fractions of the sheet), from assets/demo/demo.crops.json */
  --x1:.1300;--y1:.1410;--w1:.3285;--h1:.7250;--a1:-1.626deg;
  --x2:.5515;--y2:.1209;--w2:.3299;--h2:.6746;--a2:-1.540deg}
.stage>*{position:absolute}
.scan{inset:0;width:100%;height:100%;transition:opacity var(--d) var(--ease),filter var(--d)}
.dim{inset:0;background:#0b0b0e;opacity:0;transition:opacity var(--d) var(--ease)}
.sweep{top:0;bottom:0;left:0;width:14%;background:linear-gradient(90deg,transparent,rgba(190,220,255,.32) 70%,rgba(220,235,255,.75));
  mix-blend-mode:screen;transform:translateX(-110%);opacity:0}
.stage[data-step="0"] .sweep{opacity:1;animation:sweep 2.2s .2s var(--ease) both}
@keyframes sweep{to{transform:translateX(760%)}}

.cut{left:calc(var(--x)*100%);top:calc(var(--y)*100%);width:calc(var(--w)*100%);height:calc(var(--h)*100%);
  transform:translate(var(--tx,0),var(--ty,0)) rotate(var(--rot)) scale(var(--s,1));opacity:0;
  transition:transform var(--d) var(--ease),opacity .5s,box-shadow var(--d)}
.c1{--x:var(--x1);--y:var(--y1);--w:var(--w1);--h:var(--h1);--rot:var(--a1);--a:var(--a1)}
.c2{--x:var(--x2);--y:var(--y2);--w:var(--w2);--h:var(--h2);--rot:var(--a2);--a:var(--a2)}
.cut .clip{position:absolute;inset:0;overflow:hidden;border-radius:2px}
/* the same scan, placed so it lines up with the one underneath, then counter-rotated about the box centre */
.cut img{position:absolute;max-width:none;width:calc(100%/var(--w));height:auto;
  left:calc(var(--x)/var(--w)*-100%);top:calc(var(--y)/var(--h)*-100%);
  transform-origin:calc((var(--x) + var(--w)/2)*100%) calc((var(--y) + var(--h)/2)*100%);
  transform:rotate(calc(var(--a)*-1))}
.cut::after{content:"";position:absolute;inset:-1px;border:max(2px,.28cqw) solid var(--blue);border-radius:3px;
  clip-path:inset(0 100% 0 0);transition:clip-path .9s var(--ease),opacity .5s}
.cut b{position:absolute;left:0;top:0;transform:translate(-35%,-45%);min-width:2.6cqw;height:2.6cqw;display:grid;place-items:center;
  background:var(--blue);color:#fff;border-radius:999px;font:600 1.5cqw/1 var(--mono);opacity:0;transition:opacity .4s .5s}
.gutter{left:50.3%;top:6%;bottom:6%;width:0;border-left:max(1px,.16cqw) dashed var(--blue2);transform:rotate(-1.6deg) scaleY(0);opacity:0;
  transition:transform .7s var(--ease),opacity .4s}

.out{height:auto;width:37cqw;top:50%;transform:translate(-50%,-50%) scale(.94);opacity:0;border-radius:2px;
  box-shadow:0 2cqw 6cqw -1cqw #000;transition:opacity .7s,transform var(--d) var(--ease)}
.o1{left:26%}.o2{left:74%}

.devices{inset:0;display:flex;align-items:center;justify-content:center;gap:4cqw;opacity:0;transform:scale(.96);pointer-events:none;
  transition:opacity .7s,transform var(--d) var(--ease)}
.device{height:84cqh;aspect-ratio:3/4.15;display:flex;flex-direction:column;gap:1.6cqh;align-items:center}
.device .screen{flex:1;width:100%;border-radius:2.2cqw;border:1.1cqw solid #23232a;outline:1px solid #3a3a45;background:#0a0a0c;
  display:grid;place-items:center;overflow:hidden;box-shadow:0 2cqw 5cqw -1cqw #000}
.device.after .screen{background:var(--paper)}
.device .screen{position:relative}
.device img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.device figcaption{font:500 max(10px,1.5cqw)/1 var(--sans);color:var(--muted)}
.device.after figcaption{color:var(--blue2)}
.arrow{font-size:4cqw;color:var(--faint)}

/* step 1: find the pages */
.stage:not([data-step="0"]) .dim{opacity:.62}
.stage:not([data-step="0"]) .cut{opacity:1}
.stage:not([data-step="0"]) .cut::after{clip-path:inset(0)}
.stage[data-step="1"] .cut b{opacity:1}
.stage[data-step="1"] .gutter{opacity:.9;transform:rotate(-1.6deg) scaleY(1)}
/* step 2: split */
.stage:is([data-step="2"],[data-step="3"],[data-step="4"],[data-step="5"]) .dim{opacity:1}
.stage:is([data-step="2"],[data-step="3"],[data-step="4"],[data-step="5"]) .c1{--tx:-3.4cqw;--ty:-.4cqh}
.stage:is([data-step="2"],[data-step="3"],[data-step="4"],[data-step="5"]) .c2{--tx:2.35cqw;--ty:4.2cqh}
.stage:is([data-step="2"],[data-step="3"]) .cut{box-shadow:0 2cqw 6cqw -1cqw #000}
/* step 3: straighten */
.stage:is([data-step="3"],[data-step="4"],[data-step="5"]) .cut{--rot:0deg;--s:1.06}
.stage:is([data-step="3"],[data-step="4"],[data-step="5"]) .cut::after{opacity:.0}
/* step 4: crop to the real output pages */
.stage:is([data-step="4"],[data-step="5"]) .cut{opacity:0}
.stage[data-step="4"] .out{opacity:1;transform:translate(-50%,-50%) scale(1)}
/* step 5: read */
.stage[data-step="5"] .devices{opacity:1;transform:none}

.steps{display:flex;align-items:center;gap:10px;margin-top:18px}
.steps ol{display:flex;gap:6px;flex:1;overflow-x:auto;scrollbar-width:none;padding:3px}
.steps ol::-webkit-scrollbar{display:none}
.steps li{flex:1 0 auto}
.steps li button{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;white-space:nowrap;min-height:40px;padding:0 14px;border-radius:999px;
  border:1px solid var(--line);background:transparent;color:var(--muted);font:500 14px/1 var(--sans);cursor:pointer;transition:all .25s}
.steps li button span{font:500 11px/1 var(--mono);color:var(--faint)}
.steps li button:hover{color:var(--text);border-color:var(--line2)}
.steps li button[aria-current]{background:var(--blue);border-color:var(--blue);color:#fff}
.steps li button[aria-current] span{color:#dbe7ff}
.play{flex:none;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;display:grid;place-items:center}
.play:hover{color:var(--text);border-color:var(--line2)}
.play svg{fill:currentColor}
.play .i-play,.play[aria-pressed="true"] .i-pause{display:none}
.play[aria-pressed="true"] .i-play{display:block}
.caption{margin-top:18px;font:400 clamp(18px,2.2vw,23px)/1.4 var(--serif);min-height:4.2em;text-align:center;max-width:46ch;margin-inline:auto;text-wrap:balance}
.fineprint{color:var(--faint);font-size:13.5px;text-align:center;max-width:64ch;margin:6px auto 0}
@media (max-width:720px){.steps li button{padding:0 12px}.caption{min-height:5.6em}}

/* facts */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border-block:1px solid var(--line);padding:0;margin-top:clamp(56px,8vw,96px);max-width:none}
.facts div{background:var(--bg);padding:28px var(--pad);display:flex;flex-direction:column;gap:4px;align-items:center;text-align:center}
.facts strong{font:400 clamp(26px,3.4vw,40px)/1.1 var(--serif);letter-spacing:-.02em}
.facts span{color:var(--muted);font-size:14.5px;max-width:24ch}
@media (max-width:820px){.facts{grid-template-columns:repeat(2,1fr)}}

/* section heads */
.sec{max-width:720px;margin-bottom:clamp(32px,5vw,56px)}
.kicker{font:500 13px/1 var(--mono);color:var(--blue2);letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px}
h2{font:400 clamp(32px,5vw,56px)/1.05 var(--serif);letter-spacing:-.025em;text-wrap:balance}
.sec p:last-child{color:var(--muted);margin-top:18px;font-size:18px;text-wrap:pretty}
h3{font:600 18px/1.3 var(--sans);letter-spacing:-.01em}

/* features */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px 24px;display:flex;flex-direction:column;gap:8px}
.card.wide{grid-column:span 2;grid-row:span 2}
.card p{color:var(--muted);font-size:15.5px;line-height:1.55}
.art{height:150px;border-radius:12px;background:var(--bg2);border:1px solid var(--line);margin-bottom:12px;display:grid;place-items:center;overflow:hidden;position:relative}
.card.wide .art{height:auto;flex:1;min-height:240px}
.art-split img{width:100%;height:100%;object-fit:cover}
.art-rotate{display:flex;gap:14px;align-items:center;justify-content:center}
.art-rotate img{height:118px;width:auto;border-radius:2px}
.art-rotate span{color:var(--faint);font-size:22px}
.lines{width:120px;display:grid;gap:9px;padding:16px 14px;background:var(--paper);border-radius:2px}
.lines i{height:5px;background:#3a352c;border-radius:1px;display:block}
.lines i:last-child{width:60%}
.lines.tilt{animation:level 5s var(--ease) infinite}
@keyframes level{0%,25%{transform:rotate(-5deg)}45%,85%{transform:rotate(0)}100%{transform:rotate(-5deg)}}
.art-ocr p{font:400 15px/1.55 var(--serif);color:var(--ink);background:var(--paper);padding:14px 16px;max-width:240px;border-radius:2px}
.art-ocr mark{background:rgba(76,141,255,.45);color:inherit;padding:1px 0}
.art-cols{display:flex;gap:0;place-content:center}
.art-cols .col{width:66px;display:grid;gap:7px;padding:14px 9px;background:var(--paper);align-content:center;transition:transform .6s var(--ease)}
.art-cols .col i{height:4px;background:#3a352c;border-radius:1px;display:block}
.card:hover .art-cols .col:first-child{transform:translateX(-8px)}
.card:hover .art-cols .col:last-child{transform:translateX(8px)}
.art-same{display:flex;gap:10px;align-items:center;justify-content:center}
.art-same i{width:44px;height:64px;background:var(--paper);border-radius:2px;display:block;animation:same 5s var(--ease) infinite}
.art-same i:nth-child(2){--k:.82}.art-same i:nth-child(3){--k:1.14}.art-same i:nth-child(4){--k:.9}
@keyframes same{0%,25%{transform:scale(var(--k,1))}45%,85%{transform:scale(1)}100%{transform:scale(var(--k,1))}}
.art-keep ul{font:500 13px/1 var(--sans);color:var(--muted);display:grid;gap:10px;width:170px}
.art-keep li{padding-left:14px;border-left:2px solid var(--line2)}
.art-keep li.on{color:var(--blue2);border-color:var(--blue)}
.art-born .sheet{width:92px;height:122px;background:var(--paper);position:relative;border-radius:2px;
  background-image:repeating-linear-gradient(180deg,transparent 0 6px,#3a352c 6px 9px);background-size:54px 100%;background-position:19px 0;background-repeat:no-repeat;
  background-clip:content-box;padding:20px 0}
.art-born .box{position:absolute;inset:14px 13px;border:2px solid var(--blue);border-radius:2px;box-shadow:0 0 0 100px rgba(229,72,77,.22)}
.art-born .sheet{overflow:hidden}
.art-head .pg{width:190px;background:var(--paper);padding:10px 14px 14px;display:grid;grid-template-columns:auto 1fr;gap:9px 8px;border-radius:2px;color:var(--ink);font:400 11px/1 var(--serif);
  outline:2px solid var(--blue);outline-offset:-5px}
.art-head .pg em{text-align:center;padding-right:14px}
.art-head .pg i{grid-column:1/-1;height:4px;background:#3a352c;border-radius:1px;display:block}
.art-head .pg span,.art-head .pg em{padding-top:4px}
@media (max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.grid{grid-template-columns:1fr}.card.wide{grid-column:auto;grid-row:auto}}

/* app */
.shots{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.win{background:#0d0d10;border:1px solid var(--line2);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 30px 80px -40px #000}
.win.big{grid-column:1/-1}
.win .bar{display:flex;gap:7px;padding:11px 14px;background:#17171c;border-bottom:1px solid var(--line)}
.win .bar i,.dots i{width:11px;height:11px;border-radius:50%;background:#34343f;display:block}
.win img{width:100%}
.win:not(.big) img{max-width:560px;margin:0 auto}
.win figcaption{padding:18px 22px 22px;color:var(--muted);font-size:15.5px;border-top:1px solid var(--line);margin-top:auto;background:var(--card)}
.win figcaption strong{color:var(--text)}
@media (max-width:700px){.shots{grid-template-columns:1fr}}

/* terminal */
.term{background:#0d0d10;border:1px solid var(--line2);border-radius:14px;overflow:hidden;box-shadow:0 30px 80px -40px #000}
.term-bar{display:flex;align-items:center;gap:18px;padding:8px 14px;background:#17171c;border-bottom:1px solid var(--line)}
.dots{display:flex;gap:7px}
.tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.tabs button{font:500 13.5px/1 var(--mono);color:var(--muted);background:transparent;border:0;border-radius:8px;padding:10px 14px;cursor:pointer;white-space:nowrap}
.tabs button:hover{color:var(--text)}
.tabs button[aria-selected="true"]{background:#26262e;color:var(--text)}
.pane{padding:22px clamp(16px,3vw,28px) 26px}
.pane pre{overflow-x:auto;font-size:13.5px;line-height:1.75;color:#c9c7d1;padding-bottom:4px}
.cmd{color:#fff}
.cmd::before{content:"$ ";color:var(--blue2)}
.cmd.typing::after{content:"";display:inline-block;width:.55em;height:1.05em;background:var(--blue2);vertical-align:-.18em;margin-left:2px;animation:blink 1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
.out{transition:opacity .4s}
.pane .out.wait{opacity:0}
.dimmed,.cmt{color:var(--faint)}
.hl{color:var(--blue2)}
.ok{color:var(--green)}
.strip{display:flex;gap:12px;margin-top:20px;overflow-x:auto;padding-bottom:6px;align-items:flex-start}
.strip img{height:190px;width:auto;border-radius:2px;flex:none}
.strip.previews img{height:230px}
.note{color:var(--muted);font-size:14.5px;margin-top:16px;max-width:70ch}

/* download */
.os{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.oscard{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;text-decoration:none;color:var(--muted);display:flex;flex-direction:column;gap:10px;font-size:15px;line-height:1.5;
  transition:border-color .2s,transform .2s}
.oscard:hover{border-color:var(--blue);transform:translateY(-2px);color:var(--muted)}
.oscard h3{color:var(--text);font:400 28px/1.1 var(--serif);display:flex;align-items:center;gap:10px}
.oscard .mono{color:var(--blue2);font-size:12.5px;overflow-wrap:anywhere}
.oscard.you{border-color:color-mix(in srgb,var(--blue) 70%,transparent)}
.oscard.you h3::after{content:"your system";font:500 11px/1 var(--mono);color:var(--blue2);border:1px solid color-mix(in srgb,var(--blue) 50%,transparent);padding:4px 8px;border-radius:999px}
.extras{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-top:40px}
.extras>div{min-width:0}
.extras p{color:var(--muted);font-size:15.5px;margin-top:8px}
.snippet{background:#0d0d10;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:12px;overflow-x:auto;font-size:13px;line-height:1.7;color:#c9c7d1}
@media (max-width:800px){.os,.extras{grid-template-columns:1fr}}

/* footer */
.foot{margin-top:clamp(72px,10vw,128px);border-top:1px solid var(--line);padding:36px var(--pad) 48px;display:grid;gap:14px;justify-items:center;text-align:center;color:var(--faint);font-size:14px}
.foot p{max-width:62ch}
.foot nav{display:flex;gap:22px;flex-wrap:wrap;justify-content:center}
.foot nav a{color:var(--muted)}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
}