:root{
  --bg:#f6f7f9; --surface:#fff; --surface2:#eef1f5; --ink:#0f1b2d; --muted:#556275; --line:#dde2ea;
  --accent:#0e6b5c; --accent-ink:#fff; --accent-soft:#e2f1ee; --warn:#9a5b00; --warn-bg:#fff4dd; --danger:#b42318; --danger-bg:#fde8e6;
  --shadow:0 1px 2px rgba(15,27,45,.06),0 8px 24px rgba(15,27,45,.06);
  --radius:12px; --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
:root[data-theme="dark"]{
  --bg:#0c121b; --surface:#131b27; --surface2:#1a2433; --ink:#e8edf4; --muted:#9aa8bb; --line:#263245;
  --accent:#34b79f; --accent-ink:#04201a; --accent-soft:#12302b; --warn:#f2b35a; --warn-bg:#35280f; --danger:#ff8a80; --danger-bg:#3a1714;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0c121b; --surface:#131b27; --surface2:#1a2433; --ink:#e8edf4; --muted:#9aa8bb; --line:#263245;
    --accent:#34b79f; --accent-ink:#04201a; --accent-soft:#12302b; --warn:#f2b35a; --warn-bg:#35280f; --danger:#ff8a80; --danger-bg:#3a1714;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
img,svg{max-width:100%}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.narrow{width:min(760px,100% - 32px);margin-inline:auto}

/* demo ribbon */
.demo-bar{background:var(--warn-bg);color:var(--warn);font-size:.85rem;text-align:center;padding:8px 16px;border-bottom:1px solid var(--line)}
.demo-bar strong{font-weight:700}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.01em;color:var(--ink);text-decoration:none;font-size:1.1rem}
.brand-mark{width:28px;height:28px;border-radius:7px;background:var(--ink);color:var(--bg);display:grid;place-items:center;font-size:15px;font-weight:800}
.nav{display:flex;gap:22px;margin-left:auto;align-items:center}
.nav a{color:var(--muted);text-decoration:none;font-size:.95rem}
.nav a:hover{color:var(--ink)}
.nav .btn{color:inherit}
.btn.menu-btn{display:none;margin-left:auto}
.theme-btn{background:none;border:1px solid var(--line);color:var(--ink);border-radius:8px;width:36px;height:36px;cursor:pointer;font-size:16px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:10px 16px;font:inherit;font-weight:600;font-size:.95rem;text-decoration:none;cursor:pointer;transition:transform .05s,background .15s}
.btn:hover{background:var(--surface2)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08);background:var(--accent)}
.btn.dark{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.lg{padding:14px 22px;font-size:1rem}
.btn.block{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* hero */
.hero{padding:72px 0 56px}
.hero .grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
h1{font-size:clamp(2rem,4.4vw,3.3rem);line-height:1.1;letter-spacing:-.025em;margin:14px 0 18px}
h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.2;letter-spacing:-.02em;margin:0 0 12px}
h3{font-size:1.1rem;margin:0 0 6px}
.lead{font-size:1.15rem;color:var(--muted);max-width:56ch}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.fine{font-size:.85rem;color:var(--muted);margin-top:14px}
.trust-row{display:flex;gap:22px;flex-wrap:wrap;margin-top:26px;color:var(--muted);font-size:.9rem}
.trust-row span::before{content:"✓";color:var(--accent);font-weight:800;margin-right:7px}

section.block{padding:72px 0}
section.alt{background:var(--surface);border-block:1px solid var(--line)}
.section-head{max-width:640px;margin-bottom:36px}
.section-head p{color:var(--muted);margin:0}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card p{color:var(--muted);margin:0;font-size:.95rem}
.icon{width:38px;height:38px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:800;margin-bottom:14px}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{position:relative;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg)}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--ink);color:var(--bg);font-weight:700;margin-bottom:12px}
.step p{margin:0;color:var(--muted);font-size:.95rem}

/* before / after */
.ba{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.ba-col h3{display:flex;align-items:center;gap:10px}
.tag{font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:3px 9px;border-radius:99px}
.tag.bad{background:var(--danger-bg);color:var(--danger)}
.tag.good{background:var(--accent-soft);color:var(--accent)}
.chat{background:var(--surface2);border:1px solid var(--line);border-radius:var(--radius);padding:18px;min-height:100%;font-size:.92rem}
.bubble{background:var(--surface);border:1px solid var(--line);border-radius:12px 12px 12px 2px;padding:10px 13px;margin-bottom:10px;max-width:92%}
.bubble.me{margin-left:auto;background:#d9f2dd;color:#12351a;border-radius:12px 12px 2px 12px}
:root[data-theme="dark"] .bubble.me{background:#1f4a2a;color:#d9f2dd}
.bubble small{display:block;color:var(--muted);font-size:.75rem;margin-top:4px}
.bubble.me small{color:inherit;opacity:.7}
.mini-doc{background:#fff;color:#0f1b2d;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;font-size:.84rem}
.mini-doc .hd{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:3px solid var(--accent);padding-bottom:12px;margin-bottom:12px}
.mini-doc .hd b{font-size:1rem}
.mini-doc .muted{color:#667085}
.mini-doc table{width:100%;border-collapse:collapse;margin:8px 0}
.mini-doc td{padding:5px 0;border-bottom:1px solid #e6eaf0;vertical-align:top}
.mini-doc td:last-child{text-align:right;white-space:nowrap}
.mini-doc .tot td{font-weight:800;font-size:1rem;border-bottom:0;border-top:2px solid #0f1b2d;padding-top:9px}
.mini-doc .pill{display:inline-block;background:var(--accent-soft);color:#0e6b5c;font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:99px}

/* pricing */
.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.plan{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);position:relative}
.plan.featured{border:2px solid var(--accent)}
.plan .badge{position:absolute;top:-12px;left:24px;background:var(--accent);color:var(--accent-ink);font-size:.72rem;font-weight:700;padding:3px 11px;border-radius:99px;letter-spacing:.04em}
.plan .price{font-size:2.5rem;font-weight:800;letter-spacing:-.03em;line-height:1;margin:10px 0 2px}
.plan .price small{font-size:1rem;font-weight:500;color:var(--muted);letter-spacing:0}
.plan .per{color:var(--muted);font-size:.9rem;margin-bottom:18px}
.plan ul{list-style:none;padding:0;margin:0 0 24px;flex:1}
.plan li{padding:7px 0 7px 26px;position:relative;font-size:.95rem;border-bottom:1px solid var(--line)}
.plan li:last-child{border:0}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:800}
.plan .credits{font-weight:700;font-size:1.05rem}
.pricing-note{margin-top:22px;padding:14px 18px;border-radius:10px;background:var(--warn-bg);color:var(--warn);font-size:.9rem;border:1px solid var(--line)}

/* security */
.sec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.sec-item{display:flex;gap:14px;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg)}
.sec-item .icon{flex:none;margin:0}
.sec-item p{margin:0;color:var(--muted);font-size:.93rem}

/* faq */
details{border:1px solid var(--line);border-radius:10px;background:var(--surface);padding:0 18px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::after{content:"+";color:var(--accent);font-weight:700;font-size:1.2rem;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:0 0 16px;color:var(--muted)}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:40px 0;background:var(--surface);color:var(--muted);font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.site-footer h4{margin:0 0 10px;color:var(--ink);font-size:.9rem}
.site-footer a{display:block;color:var(--muted);text-decoration:none;padding:3px 0}
.site-footer a:hover{color:var(--ink)}
.legal-line{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);font-size:.82rem}

/* auth */
.auth{min-height:calc(100vh - 100px);display:grid;place-items:center;padding:36px 0}
.auth-card{width:min(440px,100% - 32px);background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:32px}
.auth-card h1{font-size:1.6rem;margin:6px 0 6px}
.auth-card .sub{color:var(--muted);margin:0 0 22px;font-size:.95rem}
label.f{display:block;font-size:.85rem;font-weight:600;margin:14px 0 6px}
.input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink);font:inherit}
.input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}
.err{background:var(--danger-bg);color:var(--danger);border-radius:9px;padding:10px 13px;font-size:.9rem;margin:14px 0 0}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.88rem;color:var(--muted);margin:16px 0}
.check input{margin-top:4px}
.auth-alt{text-align:center;margin-top:18px;font-size:.92rem;color:var(--muted)}

/* legal */
.legal{padding:48px 0 72px}
.legal h1{font-size:2rem}
.legal h2{font-size:1.2rem;margin:30px 0 8px}
.legal p,.legal li{color:var(--muted)}
.legal .note{background:var(--warn-bg);color:var(--warn);border-radius:10px;padding:12px 16px;font-size:.9rem;margin:18px 0}
.legal table{border-collapse:collapse;width:100%;font-size:.92rem}
.legal th,.legal td{border:1px solid var(--line);padding:8px 10px;text-align:left;color:var(--muted)}
.legal th{color:var(--ink);background:var(--surface2)}

/* checkout */
.checkout{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;padding:36px 0 72px;align-items:start}
.sim-banner{background:repeating-linear-gradient(135deg,var(--warn-bg),var(--warn-bg) 14px,transparent 14px,transparent 28px);border:2px dashed var(--warn);color:var(--warn);border-radius:12px;padding:16px 18px;margin-bottom:20px;font-weight:600}
.sim-banner small{display:block;font-weight:400;margin-top:4px}
.summary-row{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--line);font-size:.95rem}
.summary-row.total{font-weight:800;font-size:1.1rem;border:0;padding-top:14px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

@media (max-width:860px){
  .hero .grid,.ba,.cards,.steps,.pricing,.sec-grid,.foot-grid,.checkout{grid-template-columns:1fr}
  .hero{padding:40px 0}
  section.block{padding:48px 0}
  .btn.menu-btn{display:inline-flex}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:14px 16px;gap:4px}
  .nav.open{display:flex}
  .nav a{padding:10px 4px}
  .site-header .wrap{position:relative}
}

/* lista de espera */
.waitlist{margin:26px auto 0;text-align:left;max-width:560px}
.waitlist .wl-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:18px}
.waitlist label.f{margin-top:0}
.waitlist .btn{width:100%}
.waitlist .wl-note{font-size:.85rem;color:var(--muted);text-align:center;margin:12px 0 0}
.waitlist .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
@media (max-width:560px){.waitlist .wl-row{grid-template-columns:1fr}}