:root{
  --bg:#ffffff; --ink:#0a0a0b; --ink-soft:#5b5b63; --line:#ececef;
  --panel:#f6f6f7; --panel-2:#0a0a0b; --radius:18px; --radius-lg:26px;
  --maxw:1120px; --shadow:0 1px 2px rgba(0,0,0,.04),0 12px 40px rgba(0,0,0,.06);
  --shadow-hover:0 2px 4px rgba(0,0,0,.06),0 24px 60px rgba(0,0,0,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);
  line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
section{padding:96px 24px}
h1,h2,h3{letter-spacing:-.02em;line-height:1.08;font-weight:800}
.section__head{max-width:var(--maxw);margin:0 auto 48px;text-align:center}
.section__head h2{font-size:clamp(28px,4.5vw,46px);font-weight:900}
.section__head p{color:var(--ink-soft);font-size:18px;margin-top:14px}
.grid{max-width:var(--maxw);margin:0 auto;display:grid;gap:20px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;
  font-size:15px;padding:12px 20px;border-radius:999px;border:1.5px solid transparent;
  cursor:pointer;transition:.18s ease;white-space:nowrap}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.22)}
.btn--light{background:#fff;color:var(--ink)}
.btn--light:hover{transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn--lg{font-size:16px;padding:16px 28px}

/* nav */
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;
  padding:14px 24px;max-width:1200px;margin:0 auto;
  backdrop-filter:saturate(180%) blur(14px);background:rgba(255,255,255,.72);
  border-bottom:1px solid transparent;transition:.2s}
.nav.scrolled{border-bottom-color:var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em}
.brand__logo{width:26px;height:26px;color:var(--ink);
  -webkit-mask:url(assets/logo.svg) center/contain no-repeat;mask:url(assets/logo.svg) center/contain no-repeat;background:currentColor}
.brand__name span{color:var(--ink-soft)}
.nav__links{display:flex;gap:28px;margin-left:18px}
.nav__links a{color:var(--ink-soft);font-weight:500;font-size:15px;transition:.15s}
.nav__links a:hover{color:var(--ink)}
.nav__actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.lang{background:none;border:1.5px solid var(--line);border-radius:999px;padding:7px 12px;
  font-weight:600;font-size:13px;cursor:pointer;color:var(--ink);transition:.15s}
.lang:hover{border-color:var(--ink)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:22px;height:2px;background:var(--ink);border-radius:2px}

/* hero */
.hero{text-align:center;padding:84px 24px 72px;max-width:920px;margin:0 auto;position:relative}
.hero::before{content:"";position:absolute;inset:-40px 0 auto;height:420px;z-index:-1;
  background:radial-gradient(60% 80% at 50% 0%,rgba(10,10,11,.06),transparent 70%)}
.hero__badge{display:inline-block;font-weight:600;font-size:14px;color:var(--ink);
  background:var(--panel);border:1px solid var(--line);padding:8px 16px;border-radius:999px;margin-bottom:26px}
.hero__title{font-size:clamp(36px,6.4vw,68px);font-weight:900}
.hero__sub{color:var(--ink-soft);font-size:clamp(17px,2.2vw,20px);margin:22px auto 34px;max-width:640px}
.hero__cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero__trust{margin-top:26px;color:var(--ink-soft);font-size:14px}

/* cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 26px;
  transition:.2s;box-shadow:var(--shadow)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#dcdce0}
.card__ic{font-size:30px;width:58px;height:58px;display:grid;place-items:center;
  background:var(--panel);border-radius:16px;margin-bottom:18px}
.card h3{font-size:20px;margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:15px}

/* steps */
.how{background:var(--panel);border-radius:0}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 26px;text-align:left}
.step__n{width:42px;height:42px;display:grid;place-items:center;background:var(--ink);color:#fff;
  border-radius:12px;font-weight:800;font-size:18px;margin-bottom:18px}
.step h3{font-size:20px;margin-bottom:8px}.step p{color:var(--ink-soft);font-size:15px}
.how__cta{text-align:center;margin-top:42px}

/* devices */
.chips{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.chip{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:12px 20px;
  font-weight:600;font-size:15px;transition:.15s}
.chip:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}

/* pricing */
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 24px;
  text-align:center;position:relative;transition:.2s}
.plan:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.plan--best{background:var(--ink);color:#fff;border-color:var(--ink)}
.plan__tag{position:absolute;top:18px;right:18px;font-size:12px;font-weight:700;color:var(--ink-soft);
  background:var(--panel);padding:4px 10px;border-radius:999px}
.plan__tag--best{background:#fff;color:var(--ink)}
.plan__name{font-weight:600;color:var(--ink-soft);font-size:15px}
.plan--best .plan__name{color:rgba(255,255,255,.7)}
.plan__price{font-size:38px;font-weight:900;margin:10px 0 2px;letter-spacing:-.03em}
.plan__per{font-size:14px;color:var(--ink-soft)}.plan--best .plan__per{color:rgba(255,255,255,.6)}
.pricing__cta{text-align:center;margin-top:42px}
.pricing__note{color:var(--ink-soft);font-size:14px;margin-top:14px}

/* faq */
.faq__list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.faq summary{list-style:none;cursor:pointer;padding:20px 24px;font-weight:600;font-size:17px;
  display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:24px;color:var(--ink-soft);font-weight:400;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 24px 22px;color:var(--ink-soft);font-size:15px}

/* final cta */
.final{max-width:var(--maxw);margin:0 auto;background:var(--ink);color:#fff;border-radius:var(--radius-lg);
  text-align:center;padding:72px 24px}
.final h2{font-size:clamp(28px,4.5vw,44px);font-weight:900}
.final p{color:rgba(255,255,255,.7);font-size:18px;margin:14px auto 30px;max-width:520px}

/* footer */
.footer{max-width:var(--maxw);margin:0 auto;padding:56px 24px 40px;border-top:1px solid var(--line)}
.footer__top{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__links a{color:var(--ink-soft);font-size:15px;transition:.15s}.footer__links a:hover{color:var(--ink)}
.footer__bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:36px;
  color:var(--ink-soft);font-size:14px}

/* reveal animation */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media(max-width:900px){
  .grid--3,.grid--4{grid-template-columns:1fr 1fr}
  .nav__links{display:none}
  .burger{display:flex;margin-left:auto}
  .nav__actions{margin-left:0}
  .nav__actions .btn--dark{display:none}
  .nav.open .nav__links{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:#fff;padding:18px 24px;gap:16px;border-bottom:1px solid var(--line)}
}
@media(max-width:560px){
  section{padding:64px 18px}
  .grid--3,.grid--4{grid-template-columns:1fr}
  .hero__cta{flex-direction:column}.hero__cta .btn{width:100%}
}