:root {
  color-scheme: dark;
  --bg: #07101f;
  --surface: #0d1a2e;
  --surface-2: #11233d;
  --text: #f4f7ff;
  --muted: #b3c0d8;
  --primary: #6f8cff;
  --primary-strong: #4d6fff;
  --accent: #55dfc4;
  --border: #243754;
  --danger: #ff8f9a;
  --success: #65dfa8;
  --shadow: 0 18px 55px rgba(0, 0, 0, .28);
  --radius: 1.25rem;
  --max: 74rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 5%, rgba(77,111,255,.15), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { color: #8af6df; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.skip-link {
  position: fixed; left: 1rem; top: -5rem; z-index: 999;
  padding: .75rem 1rem; border-radius: .7rem; background: var(--text); color: var(--bg);
}
.skip-link:focus { top: 1rem; }
.container { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }
.narrow { width: min(calc(100% - 2rem), 48rem); margin-inline: auto; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid rgba(36,55,84,.85);
  background: rgba(7,16,31,.9); backdrop-filter: blur(16px);
}
.header-inner { min-height: 4.75rem; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--text); font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.brand-mark { width: 2rem; height: 2rem; }
.nav-toggle { display: none; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: .7rem; padding: .55rem .75rem; }
.site-nav { display: flex; align-items: center; gap: .2rem; }
.site-nav a { padding: .55rem .72rem; border-radius: .65rem; color: var(--muted); font-size: .94rem; font-weight: 650; text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.hero { padding: clamp(5rem, 10vw, 8.5rem) 0 5rem; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: clamp(2rem, 7vw, 6rem); }
.eyebrow { color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -.035em; }
h1 { max-width: 16ch; margin: .65rem 0 1.35rem; font-size: clamp(2.65rem, 7vw, 5.5rem); }
h2 { margin: 0 0 1rem; font-size: clamp(2rem, 4vw, 3.15rem); }
h3 { margin: 0 0 .7rem; font-size: 1.3rem; }
.lead { max-width: 62ch; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.25rem); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: 3rem; padding: .72rem 1.15rem; border: 1px solid transparent; border-radius: .8rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong)); color: white;
  font-weight: 750; text-decoration: none; box-shadow: 0 10px 28px rgba(77,111,255,.23);
}
.button:hover { color: white; filter: brightness(1.08); transform: translateY(-1px); }
.button-secondary { border-color: var(--border); background: var(--surface); color: var(--text); box-shadow: none; }
.hero-visual { position: relative; }
.hero-visual::before { content: ""; position: absolute; inset: 15% 5%; background: var(--primary); filter: blur(75px); opacity: .2; }
.hero-visual img { position: relative; }
.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section-alt { background: rgba(13,26,46,.52); border-block: 1px solid rgba(36,55,84,.65); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 2rem; }
.section-heading p { max-width: 42rem; margin: 0; color: var(--muted); }
.grid { display: grid; gap: 1rem; }
.grid > *, .hero-grid > *, .project-feature > *, .contact-layout > * { min-width: 0; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card {
  min-width: 0; padding: clamp(1.25rem, 3vw, 1.8rem); border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(17,35,61,.95), rgba(10,22,40,.95)); box-shadow: var(--shadow);
}
.card p, .muted { color: var(--muted); }
.card > :last-child { margin-bottom: 0; }
.card-link { color: inherit; text-decoration: none; }
.card-link:hover h3 { color: var(--accent); }
.icon { display: grid; place-items: center; width: 2.7rem; height: 2.7rem; margin-bottom: 1.1rem; border-radius: .8rem; background: rgba(111,140,255,.14); color: var(--accent); font-weight: 900; }
.tag { display: inline-flex; padding: .25rem .65rem; border: 1px solid var(--border); border-radius: 999px; color: var(--accent); font-size: .78rem; font-weight: 750; }
.meta { display: flex; flex-wrap: wrap; gap: .45rem 1rem; margin-bottom: .85rem; color: var(--muted); font-size: .88rem; }
.page-hero { padding: 5.5rem 0 3rem; }
.page-hero h1 { font-size: clamp(2.45rem, 6vw, 4.4rem); }
.breadcrumbs { margin-bottom: 1.5rem; color: var(--muted); font-size: .9rem; }
.breadcrumbs a { color: var(--muted); }
.prose { color: #d6deed; font-size: 1.06rem; }
.prose h2 { margin-top: 2.8rem; font-size: clamp(1.65rem, 3vw, 2.2rem); }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { max-width: 72ch; }
.prose li + li { margin-top: .45rem; }
.prose blockquote { margin: 2rem 0; padding: 1rem 1.25rem; border-left: 4px solid var(--accent); background: var(--surface); }
.callout { padding: 1.25rem; border: 1px solid var(--border); border-radius: 1rem; background: var(--surface); }
.author-box { display: flex; align-items: flex-start; gap: 1rem; margin-top: 3rem; padding: 1.25rem; border: 1px solid var(--border); border-radius: 1rem; background: var(--surface); }
.author-mark { flex: 0 0 auto; display: grid; place-items: center; width: 3.2rem; height: 3.2rem; border-radius: 1rem; background: linear-gradient(135deg,var(--primary),var(--accent)); color: #07101f; font-weight: 900; }
.author-box p { margin: .25rem 0 0; }
.article-note { margin: 2rem 0; padding: 1rem 1.2rem; border-left: 4px solid var(--primary); background: rgba(111,140,255,.08); }
.code-sample { overflow-x: auto; padding: 1rem; border: 1px solid var(--border); border-radius: .8rem; background: #050c18; color: #d9e5ff; font-size: .9rem; }
.project-feature { display: grid; grid-template-columns: .8fr 1.2fr; gap: 2rem; align-items: center; }
.project-panel { min-height: 20rem; display: grid; place-items: center; border: 1px solid var(--border); border-radius: var(--radius); background: radial-gradient(circle, rgba(85,223,196,.15), transparent 58%), var(--surface); }
.project-symbol { font-size: clamp(5rem, 12vw, 9rem); font-weight: 900; color: var(--accent); }
.faq { border-top: 1px solid var(--border); }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary { cursor: pointer; padding: 1.25rem .25rem; font-weight: 750; }
.faq details p { margin: -.35rem 0 1.3rem; color: var(--muted); }
.contact-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 2rem; }
label { display: block; margin-bottom: .38rem; font-weight: 700; }
input, textarea, select {
  width: 100%; border: 1px solid #395070; border-radius: .7rem; background: #081426; color: var(--text); padding: .75rem .85rem;
}
textarea { min-height: 10rem; resize: vertical; }
.field { margin-bottom: 1.15rem; }
.field-help { margin: .35rem 0 0; color: var(--muted); font-size: .84rem; }
.check { display: flex; align-items: flex-start; gap: .7rem; }
.check input { width: auto; margin-top: .35rem; }
.form-status { display: none; margin-top: 1rem; padding: .8rem 1rem; border-radius: .7rem; }
.form-status.is-visible { display: block; }
.form-status.error { border: 1px solid var(--danger); color: #ffd7db; background: rgba(255,143,154,.08); }
.form-status.success { border: 1px solid var(--success); color: #d6ffec; background: rgba(101,223,168,.08); }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.site-footer { padding: 4rem 0 2rem; border-top: 1px solid var(--border); background: #050c18; }
.footer-grid { display: grid; grid-template-columns: 1.3fr repeat(3,.8fr); gap: 2rem; }
.footer-title { margin: 0 0 .8rem; font-size: .85rem; color: var(--text); text-transform: uppercase; letter-spacing: .08em; }
.footer-links { display: grid; gap: .45rem; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.3rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .87rem; }
.cookie-panel {
  position: fixed; inset: auto 1rem 1rem; z-index: 100; display: none; width: min(calc(100% - 2rem), 42rem);
  margin-inline: auto; padding: 1.2rem; border: 1px solid var(--border); border-radius: 1rem; background: #0a172a; box-shadow: var(--shadow);
}
.cookie-panel.is-visible { display: block; }
.cookie-panel p { margin: .25rem 0 1rem; color: var(--muted); font-size: .92rem; }
.cookie-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.cookie-actions .button { min-height: 2.5rem; padding: .5rem .8rem; }
.ad-placeholder { display: none; }
.not-found { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.not-found strong { display: block; color: var(--accent); font-size: clamp(5rem, 18vw, 11rem); line-height: .9; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { position: absolute; inset: 4.75rem 1rem auto; display: none; padding: .7rem; border: 1px solid var(--border); border-radius: 1rem; background: #091629; box-shadow: var(--shadow); }
  .site-nav.is-open { display: grid; }
  .site-nav:not([data-nav]) { position: static; display: flex; flex-wrap: wrap; justify-content: flex-end; max-width: calc(100% - 7rem); padding: 0; border: 0; background: transparent; box-shadow: none; }
  .hero-grid, .project-feature, .contact-layout { grid-template-columns: minmax(0, 1fr); }
  .hero-visual { width: min(100%, 32rem); margin-inline: auto; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section-heading, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
  .actions .button { width: 100%; }
  h1 { font-size: clamp(2.4rem, 14vw, 3.6rem); }
  .author-box { flex-direction: column; }
  .site-nav:not([data-nav]) a { padding: .35rem .45rem; font-size: .8rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}