/* Longevity Bros Tech — shared stylesheet
   Brand tokens follow longevity-bros.ltd: ink / surface / bone / blue / bronze,
   Fraunces (display), Inter (text), Archivo (labels), IBM Plex Mono (data). */

@font-face{font-family:"Fraunces";src:url("assets/fonts/fraunces.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Fraunces";src:url("assets/fonts/fraunces-italic.woff2") format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"Inter";src:url("assets/fonts/inter.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Archivo";src:url("assets/fonts/archivo.woff2") format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("assets/fonts/plex-mono-400.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("assets/fonts/plex-mono-500.woff2") format("woff2");font-weight:500;font-display:swap}

:root{
  --ink:#0A0B0D; --parch:#0E1014; --surface:#141619; --raise:#1A1D22;
  --bone:#EDEDEA; --mute:#A9ADB5; --taupe:#8A8F99; --bronze:#8A8378;
  --blue:#3B82F6; --blue-hi:#9DBEF0; --blue-lo:#2C5AA0;
  --line:rgba(59,130,246,.22); --hair:rgba(237,237,234,.10);
  --disp:"Fraunces",Georgia,"Times New Roman",serif;
  --text:"Inter",-apple-system,"Segoe UI",sans-serif;
  --caps:"Archivo",-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --ease:cubic-bezier(.16,1,.3,1);
  --wrap:1160px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ink);color:var(--bone);font-family:var(--text);font-weight:300;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:inherit}
p{margin:0 0 1em}
:focus-visible{outline:2px solid var(--blue-hi);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px}
.skip{position:absolute;left:-999px;top:8px;background:var(--bone);color:var(--ink);padding:10px 16px;border-radius:6px;z-index:100}
.skip:focus{left:16px}

/* Type */
.label{font-family:var(--caps);font-stretch:112%;font-weight:600;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--bronze)}
.display{font-family:var(--disp);font-weight:340;font-variation-settings:"opsz" 144;letter-spacing:-.02em;line-height:1;margin:0}
h1.display{font-size:clamp(2.7rem,6.1vw,5rem)}
h2.display{font-size:clamp(2rem,4vw,3.1rem);line-height:1.05;letter-spacing:-.012em}
h3{font-family:var(--disp);font-weight:400;font-size:1.65rem;line-height:1.15;letter-spacing:-.01em;margin:0}
.lede{font-size:1.14rem;color:var(--mute);max-width:54ch}
.mono{font-family:var(--mono);font-size:.82rem;letter-spacing:.01em}

/* Buttons */
.btn{font-family:var(--caps);font-stretch:108%;font-weight:600;font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;text-decoration:none;display:inline-block;text-align:center;cursor:pointer;border-radius:999px;padding:16px 30px;border:1px solid transparent;transition:background .3s,border-color .3s,color .3s}
.btn-solid{background:var(--blue);border-color:var(--blue);color:#fff}
.btn-solid:hover{background:var(--blue-lo);border-color:var(--blue-lo)}
.btn-ghost{border-color:rgba(237,237,234,.38);color:var(--bone);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--bone)}
.btn-small{padding:11px 20px;font-size:.68rem;white-space:nowrap}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,11,13,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--hair)}
.nav-in{max-width:var(--wrap);margin:0 auto;padding:14px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.nav-logo img{height:46px;width:auto}
.nav-links{display:flex;gap:30px;list-style:none;margin:0;padding:0}
.nav-links a{font-family:var(--caps);font-stretch:108%;font-weight:500;font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;text-decoration:none;color:var(--mute);transition:color .2s}
.nav-links a:hover{color:var(--bone)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:84px 0 96px;background:
  radial-gradient(60% 50% at 76% 34%, rgba(59,130,246,.16), rgba(59,130,246,0) 62%),
  radial-gradient(120% 90% at 50% 130%, rgba(24,30,42,.9), rgba(10,11,13,0) 60%), var(--ink)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.hero .label{display:block;margin-bottom:28px}
.hero h1{margin-bottom:28px;max-width:11ch}
.hero .lede{margin-bottom:38px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}

/* The instrument */
.instrument{display:grid;justify-items:center;gap:22px}
.watch{width:min(100%,380px);filter:drop-shadow(0 30px 60px rgba(0,0,0,.6))}
.panel-cap{font-family:var(--mono);font-size:.76rem;color:var(--taupe);margin:-6px 0 0}
.face{opacity:0;transition:opacity .5s var(--ease)}
.face.is-on{opacity:1}
.face text{font-family:var(--mono);fill:var(--mute)}
.face .big{font-family:var(--disp);font-weight:340;fill:var(--bone)}
.face .cap{font-family:var(--caps);font-weight:600;letter-spacing:.18em;fill:var(--taupe)}
.arc{stroke-dasharray:var(--len);stroke-dashoffset:var(--len)}
.face.is-on .arc{animation:draw 1.5s var(--ease) .15s forwards}
@keyframes draw{to{stroke-dashoffset:var(--rest,0)}}
.builds{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.builds button{font-family:var(--caps);font-stretch:108%;font-weight:600;font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mute);background:transparent;border:1px solid var(--hair);border-radius:999px;padding:10px 16px;cursor:pointer;transition:color .2s,border-color .2s,background .2s}
.builds button:hover{color:var(--bone);border-color:rgba(237,237,234,.3)}
.builds button[aria-pressed="true"]{color:#fff;border-color:var(--blue);background:rgba(59,130,246,.14)}
.build-note{width:min(100%,400px);border-top:1px solid var(--line);padding-top:16px;min-height:132px}
.build-note p{font-size:.95rem;color:var(--bone);margin:0 0 10px}
.build-note ul{list-style:none;margin:0;padding:0;font-family:var(--mono);font-size:.78rem;color:var(--mute);line-height:1.75}
.build-note li::before{content:"+ ";color:var(--blue-hi)}

/* Sections */
.sec{padding:104px 0}
.sec-parch{background:var(--parch)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:end;margin-bottom:60px}
.sec-head .lede{margin:0}
.sec-head .label{display:block;margin-bottom:16px}

/* Process: a real sequence, so it is numbered */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;counter-reset:s;border-top:1px solid var(--line)}
.steps li{list-style:none;padding:26px 26px 0 0;counter-increment:s;position:relative}
.steps li+li{padding-left:26px;border-left:1px solid var(--hair)}
.steps li::before{content:"0" counter(s);font-family:var(--mono);font-size:.8rem;color:var(--blue-hi);display:block;margin-bottom:26px}
.steps h3{font-size:1.35rem;margin-bottom:10px}
.steps p{font-size:.95rem;color:var(--mute);margin:0}
.steps{margin:0;padding:0}

/* Collection: spec-sheet rows, not cards */
.sheet{border-top:1px solid var(--line)}
.item{display:grid;grid-template-columns:240px minmax(0,1.25fr) minmax(0,1fr) auto;gap:40px;align-items:center;padding:44px 0;border-bottom:1px solid var(--hair)}
.item-art{position:relative;overflow:hidden;width:240px;height:240px;display:grid;place-items:center;background:var(--surface);border:1px solid var(--hair);border-radius:14px}
.item-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.item-art svg{width:62%;height:auto;color:var(--blue-hi);stroke:var(--blue-hi);fill:none;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.item h3{margin-bottom:10px}
.item p{font-size:.98rem;color:var(--mute);margin:0;max-width:44ch}
.spec{list-style:none;margin:0;padding:0;font-family:var(--mono);font-size:.78rem;line-height:1.9;color:var(--mute)}
.spec b{font-weight:500;color:var(--bone)}
.item-buy{text-align:right;display:grid;gap:12px;justify-items:end}
.price{font-family:var(--disp);font-weight:340;font-size:1.7rem;line-height:1;white-space:nowrap}
.price small{display:block;font-family:var(--mono);font-size:.7rem;color:var(--taupe);margin-top:8px;letter-spacing:.02em}
.tag{font-family:var(--mono);font-size:.72rem;color:var(--blue-hi);border:1px solid var(--line);border-radius:999px;padding:5px 12px;white-space:nowrap}

.criteria{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;margin:0 0 56px}
.criteria h3{font-size:1.3rem;margin-bottom:8px}
.criteria p{font-size:.96rem;color:var(--mute);margin:0}
.criteria div{border-left:1px solid var(--line);padding-left:22px}
.biz-2{grid-template-columns:repeat(2,minmax(0,1fr))}

/* Software */
.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:72px;align-items:start}
.split h2{margin-bottom:22px}
.changes{margin:0;padding:0;border-top:1px solid var(--line)}
.changes div{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:28px;padding:22px 0;border-bottom:1px solid var(--hair)}
.changes dt{font-family:var(--disp);font-size:1.2rem;font-weight:400;line-height:1.25}
.changes dd{margin:0;font-size:.96rem;color:var(--mute)}
.soft-price{margin-top:34px;padding-top:28px;border-top:1px solid var(--line)}
.soft-price .price{font-size:2.1rem;white-space:normal}
.soft-price p{margin:14px 0 20px;font-size:.98rem;color:var(--mute);max-width:46ch}
.plain{margin-top:34px;padding:22px 24px;background:var(--surface);border-left:2px solid var(--blue);border-radius:0 10px 10px 0;font-size:.95rem;color:var(--mute)}
.plain strong{color:var(--bone);font-weight:500}

/* Business */
.biz{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--hair);border:1px solid var(--hair);border-radius:14px;overflow:hidden;margin-bottom:44px}
.biz div{background:var(--parch);padding:32px 30px}
.biz h3{font-size:1.3rem;margin-bottom:10px}
.biz p{font-size:.95rem;color:var(--mute);margin:0}

/* Form */
.form-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:72px;align-items:start}
form{display:grid;gap:18px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
label{display:grid;gap:8px;font-family:var(--caps);font-stretch:108%;font-weight:500;font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}
input,select,textarea{font:300 1rem var(--text);color:var(--bone);background:var(--surface);border:1px solid var(--hair);border-radius:10px;padding:14px 16px;width:100%;transition:border-color .2s}
textarea{min-height:140px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue)}
.fine{font-size:.82rem;color:var(--taupe);margin:0}
.hp{position:absolute;left:-9999px}
.facts{list-style:none;margin:30px 0 0;padding:0;border-top:1px solid var(--line)}
.facts li{padding:16px 0;border-bottom:1px solid var(--hair);font-size:.96rem;color:var(--mute)}
.facts b{display:block;color:var(--bone);font-weight:500;margin-bottom:2px}

/* Footer */
footer{background:var(--parch);border-top:1px solid var(--hair);padding:64px 0 40px;font-size:.9rem;color:var(--mute)}
.foot{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(2,minmax(0,1fr));gap:48px;margin-bottom:44px}
.foot img{height:54px;width:auto;margin-bottom:20px}
.foot h4{font-family:var(--caps);font-stretch:108%;font-weight:600;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--bronze);margin:0 0 16px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.foot a{text-decoration:none}
.foot a:hover{color:var(--bone)}
.legal{border-top:1px solid var(--hair);padding-top:26px;font-size:.8rem;color:var(--taupe);display:grid;gap:10px}
.legal p{margin:0;max-width:92ch}

/* Text pages */
.doc{padding:80px 0 110px}
.doc .wrap{max-width:780px}
.doc h1{font-size:clamp(2.2rem,5vw,3.4rem);margin-bottom:14px}
.doc .updated{font-family:var(--mono);font-size:.78rem;color:var(--taupe);margin-bottom:44px}
.doc h2{font-family:var(--disp);font-weight:400;font-size:1.5rem;letter-spacing:-.01em;margin:44px 0 12px}
.doc p,.doc li{color:var(--mute);font-size:1rem}
.doc ul{padding-left:20px}
.doc a{color:var(--blue-hi)}
.draft{background:var(--surface);border-left:2px solid var(--bronze);padding:16px 20px;border-radius:0 10px 10px 0;font-size:.92rem;color:var(--mute);margin-bottom:36px}

/* Responsive */
@media (max-width:980px){
  .hero-grid,.split,.form-grid,.sec-head{grid-template-columns:1fr;gap:44px}
  .hero{padding:56px 0 72px}
  .hero h1{max-width:14ch}
  .steps{grid-template-columns:1fr 1fr}
  .steps li:nth-child(3){padding-left:0;border-left:0}
  .steps li:nth-child(n+3){margin-top:34px}
  .item{grid-template-columns:140px minmax(0,1fr);gap:24px 28px;align-items:start}
  .item-art{width:140px;height:140px}
  .item .spec{grid-column:2}
  .item-buy{grid-column:2;text-align:left;justify-items:start}
  .biz,.biz-2{grid-template-columns:1fr}
  .criteria{grid-template-columns:1fr;gap:26px}
  .foot{grid-template-columns:1fr 1fr}
  .foot>div:first-child{grid-column:1/-1}
  .nav-links{display:none}
  .sec{padding:76px 0}
}
@media (max-width:560px){
  body{font-size:16px}
  .wrap,.nav-in{padding-left:22px;padding-right:22px}
  .nav-logo img{height:38px}
  .nav .btn{padding:10px 14px;font-size:.6rem;letter-spacing:.1em}
  .steps{grid-template-columns:1fr}
  .steps li,.steps li+li{padding:22px 0 0;border-left:0;margin-top:0}
  .steps li+li{margin-top:28px;border-top:1px solid var(--hair)}
  .item{grid-template-columns:1fr}
  .item .spec,.item-buy{grid-column:1}
  .row2{grid-template-columns:1fr}
  .changes div{grid-template-columns:1fr;gap:6px}
  .foot{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .face,.btn,.builds button{transition:none}
  .face.is-on .arc{animation:none;stroke-dashoffset:var(--rest,0)}
}

.biz h3 .tag{display:inline-block;margin-left:8px;vertical-align:middle;font-family:var(--mono);font-size:.68rem;font-weight:400;letter-spacing:0;color:var(--blue-hi);border:1px solid var(--line);border-radius:999px;padding:3px 9px;white-space:nowrap}
.studies dd a{display:block;margin-top:10px;font-family:var(--mono);font-size:.76rem;color:var(--blue-hi);text-decoration:none;border-bottom:0}
.studies dd a:hover{text-decoration:underline}

/* film band */
.film-sec{background:var(--ink);padding:0}
.film-wrap{position:relative;width:100%;height:clamp(340px,64vh,640px);overflow:hidden;isolation:isolate;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#0C0E13,#0A0B0D)}
.film-bg{position:absolute;inset:0;z-index:1;width:100%;height:100%;object-fit:cover;filter:blur(36px) saturate(.82) brightness(.46);transform:scale(1.2)}
.film-vid{position:relative;z-index:2;height:100%;width:auto;max-width:100%;aspect-ratio:1/1;object-fit:cover;filter:saturate(.94) contrast(1.03) brightness(.86);-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 16%,#000 84%,transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 16%,#000 84%,transparent 100%)}
.film-scrim{position:absolute;inset:0;z-index:3;pointer-events:none;background:linear-gradient(180deg,rgba(10,11,13,.5) 0%,rgba(10,11,13,.12) 30%,rgba(10,11,13,.45) 72%,var(--ink) 100%)}
.film-copy{position:absolute;left:0;right:0;bottom:0;z-index:5;padding-bottom:6%}
.film-copy .label{display:block;margin-bottom:14px}
.film-copy .display{max-width:20ch}
@media (max-width:760px){.film-wrap{height:clamp(300px,74vw,460px)}.film-vid{width:100%;height:auto}.film-copy{padding-bottom:9%}}