@font-face{font-family:"IBM Plex Sans";src:url("/assets/etudo-brand/IBMPlexSans-Regular.ttf") format("truetype");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("/assets/etudo-brand/IBMPlexSans-Medium.ttf") format("truetype");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("/assets/etudo-brand/IBMPlexSans-SemiBold.ttf") format("truetype");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("/assets/etudo-brand/IBMPlexMono-Medium.ttf") format("truetype");font-weight:500;font-style:normal;font-display:swap}

:root{
  --paper:#f3f0e8;
  --surface:#fbf9f4;
  --ink:#2f3238;
  --ink-2:#6a6d75;
  --pen:#b9b4a8;
  --line:#e4dfd3;
  --grid:#e9e5da;
  --yellow:#f5ec5a;
  --pink:#ffa3d1;
  --blue:#93d2ff;
  --green:#a6ee8e;
  --page-pad:clamp(20px,4vw,64px);
  --shell:1200px;
  color-scheme:light;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"IBM Plex Sans",sans-serif;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:-1;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px;opacity:.62;pointer-events:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-underline-offset:.2em}
p,h1,h2,h3{margin-top:0;text-wrap:pretty}
button,a{-webkit-tap-highlight-color:transparent}
.shell{width:min(var(--shell),calc(100% - var(--page-pad)*2));margin-inline:auto}
.skip-link{position:fixed;top:10px;left:10px;z-index:1000;padding:10px 14px;background:var(--ink);color:var(--paper);transform:translateY(-150%)}
.skip-link:focus{transform:none}

.site-header{width:min(var(--shell),calc(100% - var(--page-pad)*2));min-height:88px;margin-inline:auto;display:flex;align-items:center;justify-content:space-between;gap:32px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-size:22px;font-weight:600;letter-spacing:-.02em}
.brand img{width:42px;height:42px}
.site-header nav,.site-footer nav{display:flex;align-items:center;gap:clamp(16px,2.5vw,32px)}
.site-header nav a,.site-footer nav a{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.04em;text-decoration:none;text-transform:uppercase;color:var(--ink-2);padding-block:12px}
.site-header nav a:hover,.site-header nav a:focus-visible,.site-header nav a[aria-current="page"],.site-footer nav a:hover,.site-footer nav a:focus-visible{color:var(--ink);text-decoration:underline;text-decoration-thickness:2px}

.hero{min-height:780px;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(350px,.95fr);align-items:center;gap:clamp(48px,8vw,112px);padding-block:clamp(72px,9vw,132px)}
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:500;line-height:1.4;letter-spacing:.105em;color:var(--ink-2);text-transform:uppercase}
.hero h1{max-width:760px;margin:20px 0 28px;font-size:clamp(50px,6.4vw,88px);line-height:.98;letter-spacing:-.055em;font-weight:600}
mark{color:inherit;background:linear-gradient(transparent 58%,var(--yellow) 58%,var(--yellow) 92%,transparent 92%);padding-inline:.03em}
.mark-blue{background-image:linear-gradient(transparent 58%,var(--blue) 58%,var(--blue) 92%,transparent 92%)}
.mark-pink{background-image:linear-gradient(transparent 58%,var(--pink) 58%,var(--pink) 92%,transparent 92%)}
.lede{max-width:650px;font-size:clamp(19px,2vw,23px);line-height:1.5;color:var(--ink-2)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.button{min-height:52px;display:inline-flex;align-items:center;justify-content:center;padding:13px 21px;border:1px solid var(--ink);border-radius:11px;font-weight:600;text-decoration:none;transition:transform .18s ease,background-color .18s ease,color .18s ease}
.button:hover{transform:translateY(-2px)}
.button:active{transform:translateY(0)}
.button:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
.button-primary{background:var(--ink);color:var(--paper)}
.button-primary:hover{background:#17191d}
.button-secondary{background:var(--surface)}
.button-secondary:hover{background:#fff}
.trust-list{display:flex;flex-wrap:wrap;gap:14px 24px;margin:32px 0 0;padding:0;list-style:none;color:var(--ink-2);font-size:14px}
.trust-list li{display:flex;align-items:center;gap:8px}
.trust-list span{width:10px;height:10px;border:2px solid var(--ink);border-radius:50%}

.hero-visual{position:relative;display:grid;place-items:center;min-height:640px}
.phone{position:relative;margin:0;background:#090a0b;border:9px solid #101114;border-radius:46px;overflow:hidden;box-shadow:0 34px 80px rgba(47,50,56,.2),0 10px 24px rgba(47,50,56,.14)}
.phone::after{content:"";position:absolute;inset:0;border-radius:37px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.16);pointer-events:none}
.phone img{width:100%;height:auto}
.phone-hero{width:min(360px,80vw);transform:rotate(2.2deg)}
.paper-note{position:absolute;z-index:3;padding:14px 18px;font-family:"IBM Plex Mono",monospace;font-size:12px;line-height:1.5;letter-spacing:.05em;color:var(--ink);box-shadow:5px 7px 0 rgba(47,50,56,.12);transform:rotate(-4deg)}
.note-yellow{top:10%;left:-3%;background:var(--yellow)}
.bubble-trail{position:absolute;right:-1%;bottom:14%;display:flex;gap:9px;transform:rotate(7deg)}
.bubble-trail i{width:19px;height:19px;border:3px solid var(--ink);border-radius:50%;background:var(--paper)}
.bubble-trail i:nth-child(-n+2){background:var(--ink)}

.principles{padding-block:clamp(84px,11vw,144px);background:var(--ink);color:var(--paper)}
.section-heading{max-width:790px;margin-bottom:56px}
.section-heading h2{margin:16px 0 20px;font-size:clamp(38px,5vw,66px);line-height:1.06;letter-spacing:-.045em}
.section-heading>p:last-child{max-width:650px;color:var(--ink-2);font-size:20px}
.principles .eyebrow{color:#aaa69e}
.principles .section-heading>p:last-child{color:#cbc4b8}
.principle-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #565960;border-bottom:1px solid #565960}
.principle-grid article{padding:32px clamp(0px,3vw,38px) 38px;border-right:1px solid #565960}
.principle-grid article:first-child{padding-left:0}
.principle-grid article:last-child{border-right:0;padding-right:0}
.principle-grid .index{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--yellow)}
.principle-grid h3{margin:32px 0 12px;font-size:26px;line-height:1.15}
.principle-grid p{margin-bottom:0;color:#cbc4b8}

.feature-stack{padding-block:clamp(96px,12vw,160px)}
.feature{min-height:720px;display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.86fr);gap:clamp(52px,10vw,150px);align-items:center;padding-block:72px;border-bottom:1px solid var(--line)}
.feature:first-child{padding-top:0}
.feature:last-child{border-bottom:0;padding-bottom:0}
.feature-analysis{grid-template-columns:minmax(320px,.86fr) minmax(0,1fr)}
.feature-copy h2{max-width:650px;margin:18px 0 24px;font-size:clamp(38px,5.3vw,68px);line-height:1.05;letter-spacing:-.045em}
.feature-copy>p:not(.eyebrow){max-width:610px;font-size:20px;color:var(--ink-2)}
.plain-list{list-style:none;padding:0;margin:32px 0 0;border-top:1px solid var(--line)}
.plain-list li{position:relative;padding:14px 0 14px 28px;border-bottom:1px solid var(--line);font-size:15px}
.plain-list li::before{content:"";position:absolute;left:2px;top:22px;width:10px;height:10px;border:2px solid var(--ink);border-radius:50%}
.phone-feature{width:min(340px,78vw);justify-self:center}
.phone-plan{transform:rotate(-1.5deg)}
.phone-analysis{transform:rotate(1.5deg)}
.phone-tracking{transform:rotate(-1deg)}

.room-band{overflow:hidden;padding-block:clamp(84px,11vw,144px);background:var(--surface);border-block:1px solid var(--line)}
.room-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.72fr);align-items:center;gap:clamp(48px,9vw,120px)}
.room-copy h2{margin:18px 0 24px;font-size:clamp(44px,6vw,76px);line-height:1;letter-spacing:-.05em}
.room-copy>p:not(.eyebrow){max-width:620px;font-size:21px;color:var(--ink-2)}
.quiet-note{max-width:600px;margin-top:34px;padding:18px 0;border-block:1px dashed var(--pen);font-family:"IBM Plex Mono",monospace;font-size:13px;color:var(--ink-2)}
.quiet-note span{display:inline-block;margin-right:10px;color:var(--ink)}
.phone-room{width:min(340px,78vw);transform:rotate(2deg)}

.how{padding-block:clamp(96px,12vw,160px)}
.section-heading.compact{margin-bottom:44px}
.steps{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.steps li{display:grid;grid-template-columns:64px minmax(0,1fr);gap:24px;padding:30px 0;border-bottom:1px solid var(--line)}
.steps>li>span{display:grid;place-items:center;width:44px;height:44px;border:2px solid var(--ink);border-radius:50%;font-family:"IBM Plex Mono",monospace;font-size:14px}
.steps h3{margin:0 0 4px;font-size:25px}
.steps p{margin:0;color:var(--ink-2)}

.privacy-callout{display:grid;grid-template-columns:170px minmax(0,1fr);gap:clamp(28px,6vw,80px);align-items:center;margin-bottom:clamp(96px,12vw,160px);padding:clamp(32px,5vw,64px);background:var(--surface);border:2px solid var(--ink);box-shadow:10px 10px 0 var(--yellow)}
.privacy-callout img{width:170px;border-radius:34px}
.privacy-callout h2{margin:12px 0;font-size:clamp(36px,5vw,60px);line-height:1.05;letter-spacing:-.04em}
.privacy-callout p:not(.eyebrow){max-width:700px;color:var(--ink-2);font-size:19px}
.text-link{display:inline-flex;gap:8px;margin-top:12px;font-family:"IBM Plex Mono",monospace;font-size:13px;font-weight:500;text-decoration-thickness:2px}

.final-cta{padding-block:clamp(88px,12vw,152px);text-align:center;background:var(--yellow);border-top:2px solid var(--ink)}
.final-cta h2{margin:14px auto 20px;font-size:clamp(48px,7vw,92px);line-height:.98;letter-spacing:-.055em}
.final-cta p:not(.eyebrow){margin-bottom:30px;font-size:20px}

.site-footer{background:var(--ink);color:var(--paper)}
.footer-layout{min-height:150px;display:grid;grid-template-columns:auto 1fr auto auto;gap:32px;align-items:center}
.brand-small{font-size:18px}
.brand-small img{width:32px;height:32px}
.site-footer p{margin:0;color:#cbc4b8}
.site-footer nav a{color:#cbc4b8}
.site-footer small{color:#9f9a91;font-family:"IBM Plex Mono",monospace;font-size:11px}

.legal,.support{padding-block:clamp(72px,9vw,124px)}
.legal-hero{max-width:900px;padding-bottom:clamp(54px,7vw,88px)}
.legal-hero h1{margin:16px 0 24px;font-size:clamp(52px,7vw,92px);line-height:.98;letter-spacing:-.055em}
.legal-hero .updated{margin-top:32px;font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-2);text-transform:uppercase;letter-spacing:.06em}
.legal-layout{display:grid;grid-template-columns:230px minmax(0,760px);gap:clamp(48px,8vw,112px);align-items:start}
.legal-layout aside{position:sticky;top:24px;display:grid;gap:8px;padding:24px 0;border-block:1px solid var(--line)}
.legal-layout aside p{margin-bottom:10px}
.legal-layout aside a{font-size:14px;text-decoration:none;color:var(--ink-2);padding:4px 0}
.legal-layout aside a:hover,.legal-layout aside a:focus-visible{color:var(--ink);text-decoration:underline}
.legal-copy{min-width:0}
.legal-copy section{scroll-margin-top:24px;padding:0 0 46px;margin-bottom:46px;border-bottom:1px solid var(--line)}
.legal-copy section:last-child{border-bottom:0}
.legal-copy h2{margin-bottom:18px;font-size:clamp(28px,3vw,38px);line-height:1.15;letter-spacing:-.03em}
.legal-copy p,.legal-copy li{color:#52565e}
.legal-copy ul{padding-left:24px}
.legal-copy li+li{margin-top:8px}
.legal-copy strong{color:var(--ink)}

.support-hero{max-width:850px}
.support-hero .button{margin-top:18px}
.support-grid{display:grid;grid-template-columns:repeat(2,1fr);border:2px solid var(--ink);background:var(--surface)}
.support-grid article{position:relative;padding:clamp(26px,4vw,48px);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.support-grid article:nth-child(2n){border-right:0}
.support-grid article:nth-last-child(-n+2){border-bottom:0}
.support-number{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-2)}
.support-grid h2{margin:34px 0 12px;font-size:28px;line-height:1.15}
.support-grid p{margin:0;color:var(--ink-2)}
.faq{padding-block:clamp(84px,10vw,132px)}
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{position:relative;cursor:pointer;list-style:none;padding:24px 48px 24px 0;font-size:20px;font-weight:600}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:8px;top:21px;font-family:"IBM Plex Mono",monospace;font-size:24px;font-weight:500}
.faq details[open] summary::after{content:"−"}
.faq details p{max-width:760px;margin:0;padding:0 48px 26px 0;color:var(--ink-2)}
.support-note{display:grid;grid-template-columns:minmax(240px,.75fr) minmax(0,1.25fr);gap:48px;align-items:start;padding:clamp(28px,5vw,56px);margin-bottom:clamp(84px,10vw,132px);background:var(--ink);color:var(--paper)}
.support-note h2{margin:12px 0 0;font-size:36px;line-height:1.1}
.support-note .eyebrow{color:#aaa69e}
.support-note>p{margin:0;color:#cbc4b8;font-size:19px}

@media (max-width:900px){
  .site-header{min-height:76px}.site-header nav a:nth-child(-n+2){display:none}
  .hero{grid-template-columns:1fr;min-height:auto}.hero-copy{max-width:760px}.hero-visual{min-height:610px}
  .principle-grid{grid-template-columns:1fr}.principle-grid article,.principle-grid article:first-child,.principle-grid article:last-child{padding:30px 0;border-right:0;border-bottom:1px solid #565960}.principle-grid article:last-child{border-bottom:0}
  .feature,.feature-analysis{grid-template-columns:1fr;min-height:auto;gap:48px}.feature-analysis .phone{order:2}.feature-analysis .feature-copy{order:1}
  .room-layout{grid-template-columns:1fr}.phone-room{margin-inline:auto}
  .footer-layout{grid-template-columns:1fr auto}.site-footer p{display:none}.site-footer nav{justify-self:end}.site-footer small{grid-column:1/-1;padding-bottom:24px}
  .legal-layout{grid-template-columns:1fr}.legal-layout aside{position:static;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 20px}
}

@media (max-width:620px){
  :root{--page-pad:20px}
  body{font-size:16px}
  .site-header{gap:18px}.brand{font-size:19px}.brand img{width:36px;height:36px}.site-header nav{gap:14px}.site-header nav a{font-size:11px}
  .hero{padding-top:58px;gap:46px}.hero h1{font-size:clamp(45px,14vw,66px)}.hero-actions{flex-direction:column;align-items:stretch}.button{width:100%}.trust-list{display:grid;grid-template-columns:1fr 1fr}
  .hero-visual{min-height:530px}.phone-hero{width:min(310px,80vw)}.paper-note{left:0;top:5%;font-size:10px}.bubble-trail{right:0;bottom:9%}
  .feature{padding-block:58px}.feature-copy h2,.section-heading h2{font-size:clamp(36px,11vw,50px)}.feature-copy>p:not(.eyebrow),.section-heading>p:last-child,.room-copy>p:not(.eyebrow){font-size:18px}
  .phone-feature,.phone-room{width:min(300px,78vw)}
  .privacy-callout{grid-template-columns:1fr;box-shadow:7px 7px 0 var(--yellow)}.privacy-callout img{width:100px;border-radius:22px}
  .steps li{grid-template-columns:48px minmax(0,1fr);gap:16px}
  .footer-layout{grid-template-columns:1fr}.site-footer nav{justify-self:start}.site-footer small{grid-column:auto}
  .legal-hero h1{font-size:clamp(48px,15vw,72px)}.legal-layout aside{grid-template-columns:1fr 1fr}.support-grid{grid-template-columns:1fr}.support-grid article,.support-grid article:nth-child(2n),.support-grid article:nth-last-child(-n+2){border-right:0;border-bottom:1px solid var(--line)}.support-grid article:last-child{border-bottom:0}
  .support-note{grid-template-columns:1fr;gap:20px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

@media (prefers-contrast:more){
  :root{--ink-2:#464950;--line:#9b978e;--grid:#d5d0c5}
}