/* ===== Tokens ===== */
:root {
  --bg: #ffffff;
  --bg-alt: #f4f6fb;
  --surface: #ffffff;
  --text: #0e1525;
  --muted: #55607a;
  --border: #e2e6ef;
  --primary: #1f3fd1;
  --primary-ink: #ffffff;
  --accent: #00c2a8;
  --hero-from: #eef2ff;
  --hero-to: #ffffff;
  --shadow: 0 10px 30px -12px rgba(14, 21, 37, .18);
  --radius: 14px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", var(--font);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1020;
    --bg-alt: #10172b;
    --surface: #141c33;
    --text: #e8ecf7;
    --muted: #9aa5c0;
    --border: #233050;
    --primary: #6d8bff;
    --primary-ink: #0b1020;
    --accent: #2ee6cc;
    --hero-from: #121a35;
    --hero-to: #0b1020;
    --shadow: 0 10px 30px -12px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; margin: 0 0 .6em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.container { width: min(1180px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(820px, 100% - 32px); }

.skip-link { position: absolute; left: -999px; top: 8px; background: var(--primary); color: var(--primary-ink); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip-link:focus { left: 8px; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.eyebrow {
  font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .12em;
  color: var(--primary); margin-bottom: .8em;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4em;
  padding: .85em 1.5em; border-radius: 999px; border: 2px solid var(--primary);
  background: var(--primary); color: var(--primary-ink);
  font: 600 1rem var(--font); cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-ghost { background: transparent; color: var(--primary); }
.btn-sm { padding: .5em 1.1em; font-size: .9rem; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.site-header.scrolled { border-bottom-color: var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: inline-flex; align-items: center; gap: .5rem; color: var(--text); font: 600 1.35rem var(--font-display); }
.logo:hover { text-decoration: none; }
.logo strong { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 1.8rem; }
.nav-menu a:not(.btn) { color: var(--muted); font-weight: 500; }
.nav-menu a:not(.btn):hover { color: var(--text); text-decoration: none; }

.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: var(--text); transition: transform .2s, opacity .2s; }
.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); }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: absolute; top: 70px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--border);
    padding: 8px 16px 20px; display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-menu .btn { margin-top: 14px; }
}

/* ===== Hero ===== */
.hero { background: linear-gradient(180deg, var(--hero-from), var(--hero-to)); padding: clamp(48px, 8vw, 110px) 0; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
.hl { background: linear-gradient(90deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 38em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.hero-points { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px 24px; color: var(--muted); font-size: .95rem; }
.hero-points li::before { content: "✓"; color: var(--accent); font-weight: 700; margin-right: .45em; }

.stack { display: grid; gap: 12px; perspective: 900px; }
.layer {
  padding: 18px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
  font: 600 1rem var(--font-display);
  display: flex; align-items: center; gap: 12px;
  transform: rotateX(8deg) rotateZ(-2deg);
  animation: float 6s ease-in-out infinite;
}
.layer::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--c); box-shadow: 0 0 0 5px color-mix(in srgb, var(--c) 20%, transparent); }
.l1 { --c: #8b5cf6; margin-left: 40px; animation-delay: 0s; }
.l2 { --c: var(--primary); margin-left: 20px; animation-delay: .3s; }
.l3 { --c: #0ea5e9; animation-delay: .6s; }
.l4 { --c: #ef4444; margin-left: 20px; animation-delay: .9s; }
.l5 { --c: var(--accent); margin-left: 40px; animation-delay: 1.2s; }
@keyframes float { 0%, 100% { translate: 0 0; } 50% { translate: 0 -6px; } }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .layer { margin-left: 0 !important; transform: none; }
}

/* ===== Stats ===== */
.stats { border-block: 1px solid var(--border); background: var(--surface); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); text-align: center; }
.stats-grid > div { padding: 28px 12px; }
.stats-grid > div + div { border-left: 1px solid var(--border); }
.stats strong { display: block; font: 700 2rem var(--font-display); color: var(--primary); }
.stats span { color: var(--muted); font-size: .9rem; }
@media (max-width: 700px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid > div:nth-child(3) { border-left: 0; }
  .stats-grid > div:nth-child(n+3) { border-top: 1px solid var(--border); }
}

/* ===== Sections ===== */
.section { padding: clamp(64px, 9vw, 110px) 0; }
.section.alt { background: var(--bg-alt); }
.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head p:last-child { color: var(--muted); font-size: 1.05rem; }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); }
.card p { color: var(--muted); font-size: .95rem; }
.card ul { list-style: none; padding: 0; margin: 0; font-size: .9rem; }
.card li { padding: 4px 0; }
.card li::before { content: "→"; color: var(--accent); margin-right: .5em; }
.icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary);
}
.icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; position: relative; }
.steps p { color: var(--muted); font-size: .95rem; margin: 0; }
.step-num { display: block; font: 700 2.4rem var(--font-display); color: transparent; -webkit-text-stroke: 1.5px var(--primary); margin-bottom: 10px; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* Industries */
.chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.chips li { padding: 12px 20px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-weight: 500; }

/* About */
.about-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: start; }
.about-grid > div p { color: var(--muted); }
.values { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.values li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; border-top: 3px solid var(--accent); }
.values h3 { font-size: 1.05rem; }
.values p { color: var(--muted); font-size: .92rem; margin: 0; }
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .values { grid-template-columns: 1fr; } }

/* FAQ */
.faq details { border-bottom: 1px solid var(--border); }
.faq summary {
  cursor: pointer; list-style: none; padding: 20px 0; font: 600 1.08rem var(--font-display);
  display: flex; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.4rem; line-height: 1; color: var(--primary); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 20px; margin: 0; }

/* Contact */
.contact { background: var(--bg-alt); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; }
.contact-grid > div > p { color: var(--muted); }
.contact-info { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; }
.contact-info span { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); font-weight: 600; }
.contact-form {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: clamp(20px, 4vw, 36px); box-shadow: var(--shadow); display: grid; gap: 16px;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label { display: grid; gap: 6px; font-weight: 500; font-size: .92rem; }
.contact-form input, .contact-form select, .contact-form textarea {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; width: 100%;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent);
}
.contact-form .invalid { border-color: #e5484d; }
.contact-form .btn { justify-self: start; }
.form-status { margin: 0; font-size: .92rem; min-height: 1.4em; }
.form-status.ok { color: #12a150; }
.form-status.err { color: #e5484d; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .field-row { grid-template-columns: 1fr; } }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding-top: 56px; font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.footer-grid p { color: var(--muted); margin-top: 14px; }
.footer-grid address { font-style: normal; color: var(--muted); font-size: .9rem; }
.footer-grid h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-grid ul a { color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; border-top: 1px solid var(--border); margin-top: 40px; padding: 22px 0; color: var(--muted); font-size: .88rem; }
.footer-bottom p { margin: 0; }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > div:first-child { grid-column: 1 / -1; } }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}