:root{
  --paper:#F5F7FB; --white:#fff; --ink:#101828; --muted:#4A5568;
  --blue:#2B4CFF; --blue-dark:#1B34C4; --mint:#BDF0DC; --line:#DDE3EE;
  --radius:14px; --head:"Space Grotesk",system-ui,sans-serif; --body:"Inter",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;font-family:var(--body);color:var(--ink);background:var(--paper);line-height:1.65;font-size:1rem;overflow-x:hidden}
img,svg{max-width:100%}
.container{width:min(1120px,calc(100% - 2.5rem));margin-inline:auto}
h1,h2,h3{font-family:var(--head);line-height:1.15;margin:0 0 .6em;letter-spacing:-.02em}
h1{font-size:clamp(2.2rem,5.5vw,3.9rem);font-weight:700}
h2{font-size:clamp(1.7rem,3.5vw,2.4rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em;max-width:62ch}
a{color:var(--blue)}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.6rem 1rem;z-index:100}
.skip:focus{left:0}

/* buttons */
.btn{display:inline-block;background:var(--blue);color:#fff;text-decoration:none;font-weight:500;padding:.85rem 1.5rem;border-radius:999px;border:0;cursor:pointer;font:500 1rem var(--body);transition:background .2s,transform .2s}
.btn:hover{background:var(--blue-dark);transform:translateY(-1px)}
.btn-small{padding:.5rem 1.1rem;font-size:.95rem}
.btn-ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 2px var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
@media (hover:none){.btn:hover{transform:none}.service:hover{transform:none;border-color:var(--line)}}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(245,247,251,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:.6rem;font:700 1.3rem var(--head);color:var(--ink);text-decoration:none}
.logo-mark{width:22px;height:22px;border-radius:6px 50% 6px 50%;background:var(--blue)}
.menu{display:flex;align-items:center;gap:2rem}
.menu a:not(.btn){color:var(--ink);text-decoration:none;font-weight:500}
.menu a:not(.btn):hover{color:var(--blue)}
.nav-toggle{display:none;background:none;border:0;padding:.5rem;cursor:pointer;min-width:44px;min-height:44px;-webkit-tap-highlight-color:transparent}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero */
.hero{padding:clamp(3rem,8vw,6.5rem) 0}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:3rem;align-items:center}
.lead{font-size:1.15rem;color:var(--muted)}
.hero-actions{display:flex;flex-wrap:wrap;gap:1rem;margin-top:1.8rem}
.hero-visual{position:relative;padding:1.5rem}
.browser{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 24px 50px -24px rgba(16,24,40,.35);overflow:hidden;animation:rise .9s ease both}
.browser-bar{display:flex;gap:6px;padding:.8rem 1rem;background:var(--mint)}
.browser-bar i{width:10px;height:10px;border-radius:50%;background:var(--ink);opacity:.35}
.browser-body{padding:1.6rem}
.mock-line{height:14px;border-radius:7px;background:var(--ink);opacity:.85;margin-bottom:12px}
.mock-line:nth-child(2){opacity:.2;height:10px}.mock-line:nth-child(3){opacity:.2;height:10px}
.w90{width:90%}.w60{width:60%}.w40{width:40%}
.mock-btn{width:110px;height:34px;border-radius:999px;background:var(--blue);margin:18px 0 24px}
.mock-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mock-row div{height:70px;border-radius:10px;background:var(--paper);border:1px solid var(--line)}
.chip{position:absolute;background:var(--ink);color:#fff;font:500 .9rem var(--head);padding:.5rem .9rem;border-radius:999px;box-shadow:0 10px 24px -10px rgba(16,24,40,.5)}
.chip-a{top:0;right:0}.chip-b{bottom:0;left:0;background:var(--blue)}
@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}

/* sections */
.section{padding:clamp(3.5rem,7vw,6rem) 0}
.section-intro{color:var(--muted);margin-bottom:2.2rem}
.grid.services{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1.25rem}
.service{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;transition:border-color .2s,transform .2s}
.service:hover{border-color:var(--blue);transform:translateY(-3px)}
.service svg{width:34px;height:34px;fill:none;stroke:var(--blue);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;margin-bottom:1rem}
.service p{color:var(--muted);margin:0;font-size:.97rem}

.about{background:var(--ink);color:#fff}
.about p{color:#CBD5E1}
.about-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:3rem;align-items:center}
.facts{margin:0;display:grid;gap:1.5rem}
.facts div{border-left:3px solid var(--mint);padding-left:1.2rem}
.facts dt{font:700 2.2rem var(--head);color:var(--mint)}
.facts dd{margin:0;color:#CBD5E1}

/* contact */
.contact-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:3rem;align-items:start}
.details{list-style:none;padding:0;margin:0;display:grid;gap:1rem}
.details strong{display:block;font-family:var(--head)}
.details a{color:var(--ink)}
.form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(1.3rem,3vw,2rem)}
.field{margin-bottom:1.2rem}
label{display:block;font-weight:500;margin-bottom:.35rem}
input,textarea{width:100%;font:inherit;padding:.8rem 1rem;border:1.5px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);transition:border-color .2s}
input:focus,textarea:focus{outline:none;border-color:var(--blue);background:#fff}
.field.invalid input,.field.invalid textarea{border-color:#C62828}
.error{display:block;color:#C62828;font-size:.88rem;min-height:1.2em;margin-top:.25rem}
.form-status{margin:1rem 0 0;font-weight:500;color:#116149}

.site-footer{padding:1.8rem 0;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
.site-footer p{margin:0;max-width:none}

/* tablet */
@media (max-width:1000px){
  .grid.services{grid-template-columns:repeat(2,minmax(0,1fr))}
}
/* mobile */
@media (max-width:800px){
  .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
  .hero-visual{max-width:460px}
  .nav-toggle{display:block}
  .menu{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:1.2rem;padding:1.4rem 1.25rem 1.8rem;background:var(--paper);border-bottom:1px solid var(--line);display:none}
  .menu.open{display:flex}
}
@media (max-width:560px){
  .grid.services{grid-template-columns:1fr}
  .hero-actions .btn{width:100%;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* ---- Phone refinements ---- */
@media (max-width:800px){
  .menu{max-height:calc(100dvh - 68px);overflow-y:auto;box-shadow:0 20px 30px -20px rgba(16,24,40,.35)}
  .menu a:not(.btn){display:block;width:100%;padding:.7rem 0;font-size:1.1rem;border-bottom:1px solid var(--line)}
  .menu .btn{width:100%;text-align:center;padding:.9rem 1.2rem;font-size:1rem}
  .hero{padding:2.5rem 0 3rem}
  .hero-visual{width:100%;max-width:none;padding:1.2rem 0 1.2rem 0}
  .chip{font-size:.8rem;padding:.4rem .75rem}
  .chip-a{right:.5rem}.chip-b{left:.5rem}
  .facts{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
  .facts div{padding-left:.8rem}
  .facts dt{font-size:1.5rem}
  .facts dd{font-size:.9rem;line-height:1.35}
}
@media (max-width:560px){
  .container{width:calc(100% - 2rem)}
  .section{padding:3rem 0}
  .hero-actions{gap:.75rem}
  .browser-body{padding:1.1rem}
  .mock-row div{height:52px}
  .service{padding:1.3rem}
  .form{padding:1.2rem}
  .form .btn{width:100%}
  .details a{word-break:break-word}
}
@media (max-width:420px){
  .facts{grid-template-columns:1fr}
  .site-footer{padding-bottom:calc(1.8rem + env(safe-area-inset-bottom))}
}