@charset "UTF-8";
:root{color-scheme:light dark;--paper:#f5f3eb;--ink:#183c32;--muted:#4e6259;--line:#c5cbc0;--accent:#226548;--button-text:#fffef8;--sheet:#fffef8;--wash:#e7eadf;--gold:#775123;--focus:#a44517}
*{box-sizing:border-box}
html{scroll-padding-top:2rem}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Trebuchet MS",Verdana,sans-serif;font-size:16px;line-height:1.65}
::selection{background:var(--ink);color:var(--paper)}
a{color:inherit;text-underline-offset:.23em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:5px}
button,summary,a{-webkit-tap-highlight-color:transparent}
.wrap{max-width:1200px;margin-inline:auto;padding-inline:40px}
.header{display:flex;justify-content:space-between;align-items:center;gap:30px;padding-block:25px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;font-family:Georgia,"Times New Roman",serif;font-size:50px;font-weight:bold;line-height:1;text-decoration:none;letter-spacing:-.04em}
.brand span{color:var(--gold)}
.brand img{margin-right:14px}
nav{display:flex;flex-wrap:wrap;gap:14px 27px;font-size:14px}
nav a{text-decoration:none}
nav a:hover{text-decoration:underline}
.skip{position:absolute;top:10px;left:10px;z-index:2;padding:12px 20px;background:var(--sheet);transform:translateY(-180%)}
.skip:focus{transform:none}
h1,h2,h3,p,figure{margin:0}
h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:normal;line-height:1.1;letter-spacing:-.035em;text-wrap:balance}
h1{font-size:clamp(44px,4.4vw,62px)}
h1 em{font-weight:normal;color:var(--accent)}
h2{font-size:clamp(32px,3.2vw,44px)}
h3{font-size:19px;line-height:1.3;margin-bottom:12px}
p{max-width:70ch}
.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:65px;align-items:center;padding-block:80px 90px}
.hero-copy>p{margin-top:25px;font-size:18px;line-height:1.65}
.hero-copy .editors{font-size:14px;color:var(--muted);margin-top:18px}
.actions{display:flex;align-items:center;flex-wrap:wrap;gap:18px 24px;margin-top:30px;scroll-margin-top:30px}
.button{display:inline-flex;align-items:center;gap:22px;background:var(--accent);color:var(--button-text);padding:13px 20px;text-decoration:none;font-size:15px;font-weight:bold;border-radius:3px}
.button:hover{background:var(--ink);text-decoration:underline}
.demo-link{font-size:15px;font-weight:bold}
.hero-copy .small,.small{font-size:12px;color:var(--muted);margin-top:16px}
.lesson{background:var(--sheet);border:1px solid var(--line);transform:rotate(-1.5deg)}
.lesson figcaption{padding:16px 24px;border-bottom:1px solid var(--line);font-size:13px;font-weight:bold}
.lesson figcaption span{display:block;font-size:11px;color:var(--muted);font-weight:normal;margin-top:2px}
.lesson-body{padding:24px 26px}
.equation>span{color:var(--muted);font-size:12px}
math{font-size:28px;margin-block:12px 0}
.plot{display:block;width:100%;height:auto;margin-block:10px}
.grid{stroke:var(--line);stroke-width:.6;fill:none}
.axis{stroke:var(--muted);fill:none;stroke-width:1}
.curve{stroke:var(--accent);stroke-width:2.5;fill:none}
.points{fill:var(--accent)}
.plot-label{fill:var(--ink);font-size:12px;font-family:"Trebuchet MS",sans-serif}
.lesson-bottom{border-top:1px solid var(--line);padding-top:17px;display:flex;justify-content:space-between;gap:18px;font-size:11px;color:var(--muted)}
.lesson-bottom strong{font-family:Georgia,serif;font-size:17px;font-weight:normal;color:var(--ink)}
.section{padding-block:72px;border-top:1px solid var(--line)}
.section-intro{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:end;margin-bottom:38px}
.section-intro>p{color:var(--muted);font-size:16px}
.feature-list{display:grid;grid-template-columns:repeat(3,1fr);gap:35px 40px}
.feature-list article{padding-top:22px;border-top:1px solid var(--line)}
.feature-list p{font-size:14px;color:var(--muted)}
.platform-list{display:grid;grid-template-columns:1fr 1fr;column-gap:40px}
.platform-list>a{display:flex;align-items:center;gap:15px;padding:23px 0;border-top:1px solid var(--line);text-decoration:none}
.platform-list>a:hover strong{text-decoration:underline;text-underline-offset:4px}
.platform-list>a>span:first-child{flex:1}
.platform-list strong{display:block;font-size:17px}
.platform-list small{display:block;font-size:12px;color:var(--muted);margin-top:5px;max-width:34ch}
.status{font-size:11px;color:var(--gold);border:1px solid var(--line);padding:2px 8px;border-radius:3px}
.status.stable{color:var(--accent);background:var(--wash)}
.pricing{background:var(--wash)}
.price-note{font-size:12px;color:var(--muted);margin-bottom:16px}
.plans{display:grid;grid-template-columns:repeat(4,1fr);border-block:1px solid var(--line)}
.plans article{padding:25px 22px 25px 0}
.plans article+article{border-left:1px solid var(--line);padding-left:24px}
.plans h3{font-size:16px}
.price{font-family:Georgia,serif;font-size:38px;line-height:1.3;white-space:nowrap;font-variant-numeric:tabular-nums;letter-spacing:-.025em}
.price span{font-family:"Trebuchet MS",sans-serif;font-size:12px;letter-spacing:normal;margin-left:4px}
.contact-price{font-size:27px;min-height:49px;display:flex;align-items:center}
.quota{font-size:14px;font-weight:bold;margin-block:12px 18px}
.plans article>p:last-of-type{font-size:13px;color:var(--muted)}
.plans article>a{display:inline-block;font-size:13px;margin-top:14px;font-weight:bold}
.billing{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-block:24px}
.billing p{font-size:12px;color:var(--muted)}
.comparison{display:grid;grid-template-columns:1fr 1fr;gap:70px}
.comparison p{color:var(--muted);font-size:15px}
.comparison p+p{margin-top:18px}
.faq{display:grid;grid-template-columns:1fr 1.35fr;gap:70px}
details{border-bottom:1px solid var(--line)}
details:first-child{border-top:1px solid var(--line)}
summary{cursor:pointer;font-size:16px;font-weight:bold;padding:20px 0;line-height:1.5}
summary::marker{color:var(--accent)}
details p{padding:0 0 24px;font-size:14px;color:var(--muted)}
.footer{display:flex;align-items:center;gap:25px;padding-block:35px;border-top:1px solid var(--line)}
.footer .brand{font-size:38px}
.footer p{font-size:12px;color:var(--muted);flex:1}
.footer nav{font-size:12px;gap:16px}
@media(prefers-color-scheme:dark){:root{--paper:#14271f;--ink:#edf0e5;--muted:#b7c6bb;--line:#506257;--accent:#b1d7a7;--button-text:#14271f;--sheet:#1c3329;--wash:#20382c;--gold:#e6be89;--focus:#ffca91}}
@media(max-width:1000px){.hero{gap:35px;padding-block:60px}.wrap{padding-inline:28px}.section-intro,.comparison{gap:35px}.plans{grid-template-columns:1fr 1fr}.plans article{padding:24px}.plans article:nth-child(3){border-left:0}.plans article:nth-child(n+3){border-top:1px solid var(--line)}.footer{flex-wrap:wrap}.footer nav{flex-basis:100%}.hero-copy .small{max-width:36ch}.faq{gap:35px}}
@media(max-width:700px){.wrap{padding-inline:22px}.header{align-items:flex-start;gap:22px;padding-block:22px}.header .brand{font-size:42px}.brand img{width:36px;height:36px;margin-right:10px}.header nav{justify-content:flex-end;gap:10px 18px;font-size:12px;max-width:260px}.hero{grid-template-columns:1fr;gap:40px;padding-block:44px 55px}.hero-copy>p{font-size:17px;margin-top:22px}.hero-copy .small{max-width:none}.lesson{transform:none;max-width:470px;width:100%;margin-inline:auto}.section{padding-block:48px}.section-intro,.comparison,.faq{grid-template-columns:1fr;gap:22px}.section-intro{margin-bottom:28px}.feature-list{grid-template-columns:1fr 1fr;gap:28px 22px}.platform-list{grid-template-columns:1fr}.plans{grid-template-columns:1fr 1fr}.plans article{padding:22px 12px 22px 0}.plans article+article{padding-left:16px}.plans article:nth-child(3){padding-left:0}.price{font-size:32px}.price span{font-size:11px}.quota{font-size:12px}.contact-price{font-size:23px;min-height:42px}.billing{grid-template-columns:1fr;gap:14px}.footer{gap:18px}.footer nav{gap:12px 20px}.footer p{max-width:25ch}}
@media(max-width:400px){.feature-list{grid-template-columns:1fr;gap:22px}.actions{gap:20px}.lesson-body{padding:20px}.lesson figcaption{padding:14px 20px}.lesson-bottom{gap:10px}.lesson-bottom strong{font-size:15px}h1{font-size:42px}.price{font-size:29px}.contact-price{font-size:21px}.plans article+article{padding-left:12px}.plans article:nth-child(3){padding-left:0}}
@media(forced-colors:active){.button,.status{border:1px solid ButtonText}.curve,.axis,.grid{stroke:CanvasText}.points,.plot-label{fill:CanvasText}}

/* seletor de idioma: linha compacta, sem marcadores */
nav:has(> ul > li > a[hreflang]) ul { display: flex; flex-wrap: wrap; gap: .25rem .75rem; list-style: none; margin: .5rem 0; padding: 0; font-size: .85rem; }
nav:has(> ul > li > a[hreflang]) a { color: inherit; opacity: .75; text-decoration: none; }
nav:has(> ul > li > a[hreflang]) a:hover, nav:has(> ul > li > a[hreflang]) a:focus-visible { opacity: 1; text-decoration: underline; }
nav:has(> ul > li > a[hreflang]) a[aria-current] { opacity: 1; font-weight: bold; }