:root{--bg:#0a1527;--bg2:#0e1d33;--card:#12243c;--line:#1e3a57;--txt:#f2f7fb;--mut:#9fb2c6;--g:#00e676;--gd:#0b4a2c;--r:16px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:'DM Sans',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--txt);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
section{padding:72px 0}
h1,h2,h3{line-height:1.12;letter-spacing:-.02em}
h1{font-size:clamp(2.4rem,7vw,4.2rem);font-weight:800}
h2{font-size:clamp(1.8rem,4.6vw,2.7rem);font-weight:800}
h3{font-size:1.1rem;font-weight:700;letter-spacing:-.01em}
.g{color:var(--g)}.mut{color:var(--mut)}.center{text-align:center}
.eyebrow{color:var(--g);font-weight:700;font-size:.92rem;margin-bottom:10px}
.lead{max-width:580px;margin:18px auto 0;color:var(--mut);font-size:1.08rem}
:focus-visible{outline:3px solid var(--g);outline-offset:3px}
header{position:sticky;top:0;z-index:20;background:rgba(10,21,39,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:10px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.4rem;letter-spacing:-.03em}
.logo img{width:36px;height:36px;border-radius:9px}
.nav{display:flex;align-items:center;gap:14px}
.lang{font-size:.9rem;color:var(--mut);border:1px solid var(--line);border-radius:999px;padding:6px 12px}
.lang:hover{border-color:var(--g);color:var(--txt)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--g);color:#032713;border-radius:12px;padding:12px 20px;border:0;cursor:pointer;font:inherit;font-weight:700;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(0,230,118,.3)}
.btn.sm{padding:9px 16px;font-size:.95rem}
.btn.ghost{background:transparent;color:var(--txt);border:1px solid var(--line)}
.btn.ghost:hover{box-shadow:none;border-color:var(--g)}
.hero{padding:84px 0 72px;text-align:center;background:radial-gradient(ellipse 70% 50% at 50% 0,rgba(0,230,118,.15),transparent 70%)}
.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--gd);background:rgba(0,230,118,.08);color:var(--g);border-radius:999px;padding:7px 16px;font-size:.88rem;margin-bottom:26px}
.pill b{width:8px;height:8px;border-radius:50%;background:var(--g)}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:32px}
.cta-row .btn{padding:15px 26px;font-size:1.05rem}
.stats{display:flex;justify-content:center;gap:48px;flex-wrap:wrap;margin-top:56px}
.stat b{display:block;font-size:2.4rem;font-weight:800;color:var(--g);line-height:1}
.stat span{font-size:.9rem;color:var(--mut)}
.alt{background:var(--bg2)}
.grid{display:grid;gap:16px;margin-top:44px}
@media(min-width:760px){.grid.c3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.card .ic{font-size:1.8rem;margin-bottom:12px}
.card p{color:var(--mut);font-size:.98rem;margin-top:8px}
.step b{display:block;font-size:2.6rem;font-weight:800;color:var(--gd);line-height:1;margin-bottom:10px}
/* conversa de exemplo */
.demo{display:grid;gap:36px;align-items:center;margin-top:44px}
@media(min-width:820px){.demo{grid-template-columns:1fr 1fr}}
.chat{background:#0b141a;border:1px solid var(--line);border-radius:22px;padding:18px;max-width:420px;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:9px}
.chat .who{font-size:.85rem;color:var(--mut);border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:4px}
.m{max-width:84%;padding:9px 13px;border-radius:12px;font-size:.95rem;line-height:1.45}
.m small{display:block;font-size:.72rem;opacity:.7;margin-top:3px}
.in{background:#202c33;align-self:flex-start}
.out{background:#005c4b;align-self:flex-end}
.sys{align-self:center;font-size:.78rem;color:var(--mut);background:#182229;border-radius:999px;padding:4px 12px}
.sys.ok{color:var(--g)}
.demo ul{list-style:none;margin-top:18px;display:grid;gap:10px;color:var(--mut)}
.demo li::before{content:"✓ ";color:var(--g);font-weight:700}
.disc{margin-top:18px;font-size:.84rem;color:var(--mut);border-left:3px solid var(--g);padding-left:12px}
/* sobre */
.about{display:grid;gap:36px;align-items:center}
@media(min-width:820px){.about{grid-template-columns:5fr 6fr}}
.about img{border-radius:22px;border:1px solid var(--line);width:100%;max-width:440px;margin:0 auto}
.about p{color:var(--mut);margin-top:16px;font-size:1.05rem}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}
.tags span{border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:.85rem;color:var(--mut)}
.final{text-align:center;background:radial-gradient(ellipse 60% 60% at 50% 100%,rgba(0,230,118,.14),transparent 70%)}
.final .btn{padding:16px 30px;font-size:1.08rem;margin-top:30px}
.small{font-size:.85rem;color:var(--mut);margin-top:16px}
footer{border-top:1px solid var(--line);padding:34px 0 90px;text-align:center;color:var(--mut);font-size:.85rem}
footer .logo{justify-content:center;margin-bottom:12px;color:var(--txt)}
.float{position:fixed;right:16px;bottom:16px;z-index:30;box-shadow:0 8px 30px rgba(0,0,0,.45)}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.langs{display:flex;gap:6px}
.lang{display:inline-flex;align-items:center;gap:7px}
.lang.on{border-color:var(--g);color:var(--txt);background:rgba(0,230,118,.08)}
.fl{width:20px;height:14px;border-radius:2px;display:inline-block;vertical-align:-2px}
@media(max-width:560px){.lt{display:none}.lang{padding:6px 9px}header .btn.sm{display:none}}