:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --ink: #0b1020;
  --ink-2: #3b4458;
  --ink-3: #6b7489;
  --line: #e4e8f0;
  --brand: #2563eb;
  --brand-2: #3b82f6;
  --dark: #0b1020;
  --radius: 16px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.6; font-size: 17px; -webkit-font-smoothing: antialiased; }
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--brand); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--brand-2); outline-offset: 3px; border-radius: 6px; }

/* nav */
.nav { position: fixed; inset: 0 0 auto; z-index: 50; transition: background .25s, border-color .25s; border-bottom: 1px solid transparent; }
.nav.scrolled { background: rgba(11, 16, 32, .82); backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px); border-color: rgba(255,255,255,.08); }
.nav-in { display: flex; align-items: center; gap: 32px; height: 68px; color: #fff; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand img { border-radius: 8px; }
.brand small { font-weight: 500; opacity: .6; margin-left: 6px; font-size: 14px; }
.links { display: flex; gap: 28px; margin-left: auto; font-size: 15px; }
.links a { opacity: .78; transition: opacity .2s; }
.links a:hover { opacity: 1; }
.lang { display: inline-flex; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; padding: 3px; font-size: 12px; font-weight: 600; letter-spacing: .04em; }
.lang span { padding: 4px 9px; border-radius: 999px; opacity: .7; }
.lang span.on { background: #fff; color: var(--dark); opacity: 1; }
.lang:hover span:not(.on) { opacity: 1; }

/* hero */
.hero { position: relative; overflow: hidden; background: var(--dark); color: #fff; padding: 168px 0 96px; }
.glow { position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 380px at 82% 18%, rgba(59,130,246,.38), transparent 70%),
    radial-gradient(520px 340px at 8% 92%, rgba(124,58,237,.22), transparent 70%),
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 56px 56px; }
.hero .wrap { position: relative; }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--brand); margin-bottom: 16px; }
.hero .eyebrow { color: #93c5fd; }
.hero h1 { font-size: clamp(40px, 6.4vw, 76px); font-weight: 800; max-width: 14ch; letter-spacing: -0.035em; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, #60a5fa, #a78bfa); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: clamp(17px, 1.6vw, 20px); color: rgba(255,255,255,.74); max-width: 62ch; margin-top: 24px; }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 12px; font-weight: 600; font-size: 16px; transition: transform .15s, background .2s, box-shadow .2s; }
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--brand); color: #fff; box-shadow: 0 8px 24px -8px rgba(37,99,235,.7); }
.btn.primary:hover { background: #1d4ed8; }
.btn.ghost { border: 1px solid rgba(255,255,255,.25); color: #fff; }
.btn.ghost:hover { background: rgba(255,255,255,.08); }
.btn.big { min-height: 56px; padding: 0 28px; font-size: 17px; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin: 72px 0 0; padding-top: 32px; border-top: 1px solid rgba(255,255,255,.12); max-width: 820px; }
.stats dt { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; }
.stats dd { margin: 4px 0 0; color: rgba(255,255,255,.6); font-size: 14px; }

/* sections */
.section { padding: 112px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { font-size: clamp(30px, 3.8vw, 46px); font-weight: 750; max-width: 22ch; }
.sub { color: var(--ink-2); margin-top: 16px; max-width: 60ch; font-size: 18px; }
.grid { display: grid; gap: 20px; margin-top: 56px; }
.services { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: border-color .2s, box-shadow .2s, transform .2s; }
.card:hover { border-color: #c9d6f3; box-shadow: 0 12px 32px -18px rgba(37,99,235,.35); transform: translateY(-2px); }
.ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: #eff4ff; color: var(--brand); margin-bottom: 20px; }
.ico svg, .arrow { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.card h3, .why-item h3, .steps h3 { font-size: 19px; font-weight: 650; margin-bottom: 8px; }
.card p, .why-item p, .steps p { color: var(--ink-2); font-size: 15.5px; }

/* portfolio */
.work { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.proj { position: relative; display: flex; flex-direction: column; padding: 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); overflow: hidden; transition: transform .2s, box-shadow .2s, border-color .2s; }
.proj::before { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: linear-gradient(90deg, hsl(var(--h) 80% 52%), hsl(calc(var(--h) + 40) 80% 60%)); }
.proj:hover { transform: translateY(-3px); border-color: hsl(var(--h) 60% 80%); box-shadow: 0 18px 40px -22px hsl(var(--h) 70% 40% / .55); }
.proj-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.mono { display: grid; place-items: center; min-width: 48px; height: 48px; padding: 0 10px; border-radius: 12px; font-weight: 800; font-size: 15px; letter-spacing: -.01em; color: hsl(var(--h) 75% 32%); background: hsl(var(--h) 85% 95%); }
.badge { font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: #fff7e6; color: #9a5b00; border: 1px solid #ffe2a8; }
.proj h3 { font-size: 21px; font-weight: 700; margin-bottom: 8px; }
.proj p { color: var(--ink-2); font-size: 15.5px; flex: 1; }
.host { display: inline-flex; align-items: center; gap: 6px; margin-top: 22px; font-size: 14px; font-weight: 600; color: hsl(var(--h) 70% 38%); }
.host .arrow { width: 16px; height: 16px; transition: transform .2s; }
.proj:hover .arrow { transform: translate(2px, -2px); }
.proj.wide { grid-column: span 2; }
.proj.wide p { max-width: 56ch; }

/* process */
.steps { list-style: none; padding: 0; margin: 56px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; counter-reset: s; }
.steps li { position: relative; padding-top: 28px; border-top: 2px solid var(--line); }
.steps li::before { content: ""; position: absolute; top: -2px; left: 0; width: 48px; height: 2px; background: var(--brand); }
.num { display: block; font-size: 14px; font-weight: 700; color: var(--brand); margin-bottom: 14px; font-variant-numeric: tabular-nums; }

/* why */
.why { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
.why-item { padding-left: 18px; border-left: 2px solid #c9d6f3; }
.stack-title { margin-top: 64px; font-size: 14px; font-weight: 600; color: var(--ink-3); text-transform: uppercase; letter-spacing: .1em; }
.stack { list-style: none; padding: 0; margin: 16px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.stack li { padding: 8px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--line); font-size: 14px; font-weight: 500; color: var(--ink-2); }

/* contact */
.contact { padding: 112px 0 120px; }
.contact-box { position: relative; overflow: hidden; text-align: center; padding: 80px 32px; border-radius: 28px; color: #fff;
  background: radial-gradient(500px 300px at 85% 0%, rgba(96,165,250,.35), transparent 70%), radial-gradient(400px 260px at 0% 100%, rgba(167,139,250,.28), transparent 70%), var(--dark); }
.contact-box .eyebrow { color: #93c5fd; }
.contact-box h2 { margin: 0 auto; max-width: 20ch; }
.contact-box .lead { color: rgba(255,255,255,.72); max-width: 54ch; margin: 18px auto 36px; font-size: 18px; }
.note { margin-top: 18px; font-size: 14px; color: rgba(255,255,255,.55); }

/* footer */
.foot { border-top: 1px solid var(--line); padding: 40px 0 48px; font-size: 14px; color: var(--ink-3); }
.foot-in { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.foot .brand { color: var(--ink); font-size: 16px; margin-bottom: 10px; }
.foot-meta { display: flex; flex-direction: column; gap: 6px; text-align: right; }
.foot-meta a:hover { color: var(--brand); }

/* reveal on scroll (only when JS runs) */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .proj { transition: none; }
}

@media (max-width: 980px) {
  .services, .work { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps, .why { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .proj.wide + .proj.wide, .work .proj:nth-child(6) { grid-column: span 1; }
  .links { display: none; }
  .lang { margin-left: auto; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .hero { padding: 128px 0 72px; }
  .stats { grid-template-columns: 1fr; gap: 16px; margin-top: 48px; }
  .section { padding: 80px 0; }
  .grid { margin-top: 40px; }
  .services, .work, .steps, .why { grid-template-columns: 1fr; }
  .proj.wide { grid-column: auto; }
  .contact-box { padding: 56px 20px; border-radius: 20px; }
  .btn.big { width: 100%; font-size: 16px; padding: 0 16px; }
  .foot-meta { text-align: left; }
}