/* ============================================================
   CORTEX EDU — Design System das landings (CMS)
   Reutilizável por todas as páginas. Cores da marca, hero, CRO,
   pricing, FAQ, motion (reveal-on-scroll). Mobile-first.
   ============================================================ */
:root{--p:#7c3aed;--c:#06b6d4;--ink:#0b1020;--ink2:#161d33;--tx:#0f172a;--mut:#64748b;--bg:#f7f7fb;--line:#e9e6df}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,sans-serif;color:var(--tx);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
img{max-width:100%}

/* nav */
/* barra de rolagem sempre presente: evita o conteúdo "pular" lateralmente ao trocar de página */
html{overflow-y:scroll}
.nav{position:sticky;top:0;z-index:50;background:rgba(11,16,32,.85);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-in{display:flex;align-items:center;gap:20px;padding:14px 22px;max-width:1140px;margin:0 auto}
/* brand à esquerda; links logo após (posição estável em todas as páginas); CTA empurrado à direita */
.brand{font-weight:900;color:#fff;font-size:19px;letter-spacing:-.02em;margin-right:26px}.brand span{color:var(--c)}
.nav a{color:#cbd5e1;font-size:14px;font-weight:600}.nav a:hover{color:#fff}
.nav a.active{color:#fff}/* ativo muda só a cor, nunca a largura → o menu não "pula" */
.nav .nav-verify{color:#67e8f9;border:1px solid rgba(103,232,249,.4);padding:6px 12px;border-radius:999px;font-weight:700;white-space:nowrap}
.nav .nav-verify:hover{background:rgba(103,232,249,.12);color:#a5f3fc}
.nav .cta{background:linear-gradient(135deg,var(--p),var(--c));color:#fff;padding:9px 16px;border-radius:10px;margin-left:auto}
@media(max-width:820px){.nav-in a:not(.brand):not(.cta):not(.nav-verify){display:none}.nav .nav-verify{padding:5px 10px;font-size:12.5px}}

/* hero */
.hero{position:relative;background:radial-gradient(ellipse 80% 70% at 50% -10%,rgba(124,58,237,.45),transparent 60%),linear-gradient(180deg,var(--ink),var(--ink2));color:#fff;text-align:center;padding:84px 22px 92px;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(124,58,237,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(124,58,237,.08) 1px,transparent 1px);background-size:42px 42px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 0%,#000,transparent 70%);pointer-events:none}
.hero>*{position:relative;z-index:1}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#c4b5fd;background:rgba(167,139,250,.14);border:1px solid rgba(167,139,250,.3);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:clamp(32px,6vw,58px);font-weight:900;letter-spacing:-.03em;line-height:1.05;max-width:880px;margin:0 auto 18px}
.hero h1 em{font-style:normal;background:linear-gradient(135deg,#a78bfa,#22d3ee);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:clamp(16px,2.2vw,20px);color:#cbd5e1;max-width:660px;margin:0 auto 30px}
.btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{padding:15px 28px;border-radius:12px;font-weight:800;font-size:16px;transition:transform .15s,box-shadow .15s;display:inline-block;cursor:pointer;border:none}
.btn-1{background:linear-gradient(135deg,var(--p),var(--c));color:#fff;box-shadow:0 16px 40px -12px rgba(124,58,237,.7)}
.btn-1:hover{transform:translateY(-2px)}.btn-2{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.2)}.btn-2:hover{background:rgba(255,255,255,.16)}
.trust{margin-top:20px;font-size:13px;color:#94a3b8}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;max-width:900px;margin:-44px auto 0;position:relative;z-index:2;padding:0 22px}
.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;text-align:center;box-shadow:0 10px 30px -18px rgba(15,23,42,.3)}
.stat b{display:block;font-size:28px;font-weight:900;background:linear-gradient(135deg,var(--p),var(--c));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat span{font-size:12.5px;color:var(--mut)}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}

/* sections */
section{padding:64px 0}.sec-h{text-align:center;max-width:680px;margin:0 auto 40px}
.sec-h h2{font-size:clamp(26px,4vw,38px);font-weight:900;letter-spacing:-.03em}.sec-h p{color:var(--mut);font-size:16px;margin-top:10px}
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.feat{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;border-top:3px solid var(--p)}
.feat .ic{width:54px;height:54px;border-radius:14px;background:linear-gradient(135deg,var(--p),var(--c));color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:14px}
.feat h3{font-size:18px;font-weight:800;margin-bottom:6px}.feat p{color:var(--mut);font-size:14.5px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;position:relative}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:24px;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--p),var(--c));color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center}
.step h3{font-size:17px;font-weight:800;margin:12px 0 6px}.step p{color:var(--mut);font-size:14px}
@media(max-width:720px){.steps{grid-template-columns:1fr}}
.band{background:linear-gradient(135deg,var(--ink),var(--ink2));color:#fff}.band .sec-h h2{color:#fff}.band .sec-h p{color:#94a3b8}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:840px;margin:0 auto}
.plan{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;position:relative}
.plan-pop{border:2px solid var(--p);box-shadow:0 24px 60px -24px rgba(124,58,237,.5)}
.plan-pop::before{content:"MAIS POPULAR";position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--p),var(--c));color:#fff;font-size:11px;font-weight:800;letter-spacing:.06em;padding:5px 14px;border-radius:999px}
.plan h3{font-size:20px;font-weight:800}.plan .price{font-size:40px;font-weight:900;margin:10px 0 2px}.plan .price small{font-size:15px;color:var(--mut);font-weight:600}
.plan .old{color:var(--mut);text-decoration:line-through;font-size:14px}
.plan ul{list-style:none;margin:18px 0;display:flex;flex-direction:column;gap:9px}.plan li{font-size:14.5px;padding-left:26px;position:relative;color:#334155}
.plan li::before{content:"✓";position:absolute;left:0;color:#16a34a;font-weight:900}
.plan .btn{width:100%;text-align:center}

/* faq */
.faq{max-width:760px;margin:0 auto}.qa{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:12px}
.qa summary{font-weight:700;cursor:pointer;font-size:16px;list-style:none}.qa summary::-webkit-details-marker{display:none}
.qa p{color:var(--mut);margin-top:10px;font-size:14.5px}

/* cta final + footer */
.cta-final{text-align:center}.cta-final h2{font-size:clamp(26px,4vw,40px);font-weight:900;color:#fff;letter-spacing:-.03em}.cta-final p{color:#cbd5e1;margin:12px 0 26px;font-size:17px}
footer{background:var(--ink);color:#94a3b8;text-align:center;padding:34px 22px;font-size:13.5px}

/* motion */
.rv{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}