:root {
  --ink: #07111f;
  --ink-2: #10233b;
  --muted: #52657b;
  --paper: #f7fbff;
  --white: #ffffff;
  --line: #dbe8f4;
  --cyan: #00d9ff;
  --teal: #00e6b8;
  --blue: #1597ff;
  --violet: #9d5cff;
  --pink: #ff4fd8;
  --yellow: #ffe65b;
  --orange: #ff9b42;
  --danger: #c81e59;
  --ok: #087f5b;
  --shadow: 0 24px 70px rgba(7, 17, 31, .12);
  --shadow-sm: 0 12px 36px rgba(7, 17, 31, .09);
  --radius-lg: 32px;
  --radius-md: 22px;
  --radius-sm: 14px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 2%, rgba(0, 217, 255, .12), transparent 26rem),
    radial-gradient(circle at 92% 8%, rgba(255, 79, 216, .10), transparent 25rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
::selection { background: rgba(0, 217, 255, .28); }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  transform: translateY(-140%);
  padding: .7rem 1rem;
  border-radius: 12px;
  color: #fff;
  background: var(--ink);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(219, 232, 244, .88);
  background: rgba(247, 251, 255, .88);
  backdrop-filter: blur(18px) saturate(150%);
}
.nav-shell {
  width: min(var(--max), calc(100% - 32px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 900;
  letter-spacing: -.04em;
  font-size: 1.25rem;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--ink);
  background: linear-gradient(135deg, var(--yellow), var(--cyan) 48%, var(--pink));
  box-shadow: 0 8px 24px rgba(0, 217, 255, .28);
}
.brand-mark svg { width: 26px; height: 26px; }
.brand-text span { color: var(--blue); }
.desktop-nav { display: flex; align-items: center; gap: 4px; }
.desktop-nav a {
  text-decoration: none;
  padding: .64rem .78rem;
  border-radius: 13px;
  color: #263c54;
  font-size: .94rem;
  font-weight: 750;
}
.desktop-nav a:hover, .desktop-nav a[aria-current="page"] { background: #eaf6ff; color: #045f9f; }
.header-cta { white-space: nowrap; }
.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 14px;
  padding: .65rem;
  color: var(--ink);
}
.menu-toggle svg { width: 24px; height: 24px; }
.mobile-nav { display: none; }
.mobile-nav.open { display: grid; }
.mobile-nav {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.mobile-nav a {
  text-decoration: none;
  padding: .8rem 1rem;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 14px;
  font-weight: 750;
}

main { overflow: clip; }
.shell { width: min(var(--max), calc(100% - 32px)); margin-inline: auto; }
.narrow { width: min(820px, calc(100% - 32px)); margin-inline: auto; }
.section { padding: 92px 0; }
.section.compact { padding: 64px 0; }
.section.tint { background: linear-gradient(180deg, rgba(231, 247, 255, .74), rgba(250, 253, 255, .85)); border-block: 1px solid var(--line); }
.section.dark {
  color: #ecf8ff;
  background:
    radial-gradient(circle at 12% 18%, rgba(0, 217, 255, .23), transparent 24rem),
    radial-gradient(circle at 90% 15%, rgba(255, 79, 216, .20), transparent 23rem),
    #07111f;
}
.section-header { max-width: 760px; margin-bottom: 36px; }
.section-header.center { text-align: center; margin-inline: auto; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin: 0 0 14px;
  padding: .38rem .68rem;
  border-radius: 999px;
  color: #075d8f;
  background: #e6f8ff;
  border: 1px solid #bfeaff;
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: linear-gradient(135deg, var(--cyan), var(--pink)); box-shadow: 0 0 0 4px rgba(0, 217, 255, .13); }
.kicker { color: var(--blue); font-weight: 800; font-size: .95rem; }
h1, h2, h3, h4 { margin: 0; color: var(--ink); font-family: "Space Grotesk", Inter, ui-sans-serif, system-ui, sans-serif; line-height: 1.08; letter-spacing: -.035em; }
h1 { font-size: clamp(2.65rem, 6vw, 5.9rem); }
h2 { font-size: clamp(2rem, 4vw, 3.45rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.75rem); }
.dark h1, .dark h2, .dark h3 { color: #fff; }
.lead { margin: 22px 0 0; color: var(--muted); font-size: clamp(1.08rem, 2.2vw, 1.32rem); line-height: 1.66; }
.dark .lead { color: #b9d2e3; }
.gradient-text {
  background: linear-gradient(90deg, #0076d6, #00bda8 38%, #9b52ff 70%, #e835b9);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero { padding: 74px 0 84px; position: relative; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(21, 151, 255, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(21, 151, 255, .06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.7), transparent 92%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 60px; }
.hero-copy { position: relative; z-index: 2; }
.hero h1 { max-width: 820px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  min-height: 48px;
  padding: .72rem 1.08rem;
  border: 1px solid transparent;
  border-radius: 15px;
  text-decoration: none;
  font-size: .95rem;
  font-weight: 850;
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible, a:focus-visible, button:focus-visible { outline: 3px solid rgba(0, 145, 255, .38); outline-offset: 3px; }
.btn.primary { color: #04121f; background: linear-gradient(135deg, var(--yellow), var(--cyan)); box-shadow: 0 12px 30px rgba(0, 217, 255, .26); }
.btn.secondary { color: var(--ink); background: #fff; border-color: var(--line); box-shadow: var(--shadow-sm); }
.btn.dark-button { color: #fff; background: var(--ink); border-color: rgba(255,255,255,.08); }
.hero-visual { position: relative; }
.hero-visual::before { content: ""; position: absolute; inset: 12% 8% -4%; border-radius: 50%; background: linear-gradient(135deg, rgba(0, 217, 255, .4), rgba(157, 92, 255, .25), rgba(255, 79, 216, .35)); filter: blur(44px); }
.hero-visual img { position: relative; width: 100%; border-radius: 30px; box-shadow: 0 34px 90px rgba(7, 17, 31, .25); border: 1px solid rgba(255,255,255,.85); }
.hero-note { display: flex; align-items: flex-start; gap: 10px; margin-top: 22px; color: var(--muted); font-size: .92rem; }
.hero-note strong { color: var(--ink); }

.pill-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.pill { padding: .45rem .72rem; border-radius: 999px; background: rgba(255,255,255,.82); border: 1px solid var(--line); color: #344b62; font-size: .83rem; font-weight: 760; }

.grid { display: grid; gap: 22px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.91);
  box-shadow: var(--shadow-sm);
}
.card.interactive { transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.card.interactive:hover { transform: translateY(-5px); border-color: #a8ddf7; box-shadow: var(--shadow); }
.card h3 { margin-bottom: 12px; }
.card p { margin: 0; color: var(--muted); }
.card p + p { margin-top: 12px; }
.card-link { position: absolute; inset: 0; border-radius: inherit; }
.card-link:focus-visible { outline: 3px solid rgba(0,145,255,.42); outline-offset: 4px; }
.icon-box {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  border-radius: 16px;
  font-size: 1.35rem;
  background: linear-gradient(135deg, rgba(255,230,91,.95), rgba(0,217,255,.86));
  box-shadow: 0 12px 28px rgba(0,217,255,.18);
}
.card .arrow { display: inline-flex; margin-top: 18px; color: #056da9; font-weight: 850; font-size: .92rem; }

.feature-list { display: grid; gap: 12px; margin: 28px 0 0; padding: 0; list-style: none; }
.feature-list li { display: flex; align-items: flex-start; gap: 12px; color: #30475f; }
.feature-list li::before { content: "✓"; flex: 0 0 24px; width: 24px; height: 24px; display: grid; place-items: center; border-radius: 8px; background: #dffaf4; color: #087f5b; font-weight: 900; font-size: .8rem; margin-top: .12rem; }
.dark .feature-list li { color: #c2d9e7; }

.split { display: grid; grid-template-columns: .92fr 1.08fr; gap: 54px; align-items: start; }
.sticky-side { position: sticky; top: 112px; }
.content-stack { display: grid; gap: 26px; }
.content-panel { padding: 30px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--line); }
.content-panel h2, .content-panel h3 { margin-bottom: 14px; }
.content-panel p { margin: 0; color: var(--muted); }
.content-panel p + p { margin-top: 14px; }

.stats-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; margin-top: 42px; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: var(--line); }
.stat { padding: 20px; background: #fff; text-align: center; }
.stat strong { display: block; font-size: 1.15rem; color: var(--ink); }
.stat span { color: var(--muted); font-size: .83rem; }

.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0 0 22px; padding: 0; list-style: none; color: #63768a; font-size: .86rem; }
.breadcrumbs a { text-decoration: none; color: #216b98; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #a6b5c3; }

.page-hero { padding: 68px 0 58px; border-bottom: 1px solid var(--line); }
.page-hero .lead { max-width: 820px; }
.page-hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.point-card { padding: 28px; border-radius: 26px; color: #dff6ff; background: linear-gradient(145deg, #081522, #102c44); box-shadow: var(--shadow); }
.point-card h2 { color: #fff; font-size: 1.35rem; margin-bottom: 18px; }
.point-card .feature-list { margin-top: 0; }
.point-card .feature-list li { color: #cce4f0; }

.blog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.post-card { overflow: hidden; padding: 0; }
.post-card img { width: 100%; aspect-ratio: 1; object-fit: cover; border-bottom: 1px solid var(--line); }
.post-card-body { padding: 24px; }
.post-card .meta { display: flex; flex-wrap: wrap; gap: 8px 12px; margin-bottom: 12px; color: #64778b; font-size: .78rem; font-weight: 720; }
.post-card h3 { font-size: 1.35rem; }
.post-card h3 a { position: relative; z-index: 2; text-decoration: none; }
.post-card .excerpt { margin-top: 12px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; padding: 0; list-style: none; }
.tag { display: inline-flex; text-decoration: none; padding: .35rem .58rem; border-radius: 999px; background: #eef8fd; color: #17638f; border: 1px solid #d3eaf6; font-size: .75rem; font-weight: 780; }

.article-hero { padding: 60px 0 42px; }
.article-hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.article-hero h1 { font-size: clamp(2.5rem, 5.5vw, 4.85rem); }
.article-hero img { border-radius: 28px; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.86); }
.article-meta { display: flex; flex-wrap: wrap; gap: 9px 14px; margin: 20px 0 0; color: #607286; font-size: .88rem; font-weight: 720; }
.article-layout { display: grid; grid-template-columns: minmax(0, 780px) 290px; gap: 54px; align-items: start; }
.prose { font-size: 1.08rem; line-height: 1.83; }
.prose h2 { margin: 2.4em 0 .68em; font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
.prose h3 { margin: 2em 0 .65em; }
.prose p { margin: 0 0 1.25em; color: #2e4257; }
.prose a { color: #006ca8; text-decoration-thickness: .1em; text-underline-offset: .15em; font-weight: 760; }
.prose ul, .prose ol { margin: 0 0 1.35em; padding-left: 1.25em; color: #2e4257; }
.prose li + li { margin-top: .45em; }
.prose code { padding: .12em .32em; border-radius: 6px; background: #edf5fa; color: #8a1f62; font-size: .9em; }
.prose pre { overflow: auto; padding: 20px; border-radius: 18px; background: #07111f; color: #dff8ff; }
.article-sidebar { position: sticky; top: 108px; display: grid; gap: 18px; }
.sidebar-card { padding: 22px; border-radius: 20px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.sidebar-card h2 { font-size: 1.05rem; margin-bottom: 12px; }
.sidebar-card p { margin: 0; color: var(--muted); font-size: .9rem; }
.sidebar-card ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 9px; }
.sidebar-card a { color: #17638f; text-decoration: none; font-size: .9rem; font-weight: 760; }
.source-note { margin: 40px 0; padding: 22px 24px; border-radius: 18px; background: linear-gradient(135deg, #e7fbff, #fff8d7); border: 1px solid #cdeaf1; }
.source-note p { margin: 0; }
.author-box { display: flex; gap: 18px; align-items: flex-start; margin-top: 46px; padding: 24px; border-radius: 22px; background: #fff; border: 1px solid var(--line); }
.author-avatar { flex: 0 0 52px; width: 52px; height: 52px; display: grid; place-items: center; border-radius: 16px; background: linear-gradient(135deg, var(--yellow), var(--cyan), var(--pink)); font-weight: 950; }
.author-box p { margin: 4px 0 0; color: var(--muted); font-size: .92rem; }

.archive-hero { padding: 68px 0 42px; }
.archive-hero .lead { max-width: 800px; }

.faq-list { display: grid; gap: 14px; }
.faq-item { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow-sm); }
.faq-question { width: 100%; display: flex; justify-content: space-between; gap: 18px; align-items: center; border: 0; background: transparent; padding: 20px 22px; text-align: left; color: var(--ink); font-weight: 850; }
.faq-icon { flex: 0 0 auto; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 9px; background: #eaf8ff; color: #0573b1; transition: transform .18s ease; }
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }
.faq-answer { padding: 0 22px 22px; color: var(--muted); }
.faq-answer[hidden] { display: none; }

.callout { padding: 36px; border-radius: var(--radius-lg); background: linear-gradient(135deg, #06131f, #0b3048); color: #e7f8ff; box-shadow: var(--shadow); }
.callout h2, .callout h3 { color: #fff; }
.callout p { color: #bdd6e4; max-width: 760px; }
.callout .btn { margin-top: 12px; }

.contact-card { display: grid; grid-template-columns: .8fr 1.2fr; overflow: hidden; border-radius: 30px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.contact-side { padding: 40px; color: #eaf9ff; background: linear-gradient(145deg, #07111f, #0d3b55); }
.contact-side h2 { color: #fff; }
.contact-main { padding: 40px; }
.email-link { display: inline-flex; word-break: break-all; margin-top: 18px; color: #006da9; font-size: clamp(1.2rem, 3vw, 2rem); font-weight: 900; text-decoration-thickness: .12em; text-underline-offset: .18em; }

.site-footer { padding: 72px 0 28px; color: #bcd3e1; background: #06111d; }
.footer-grid { display: grid; grid-template-columns: 1.25fr repeat(3, 1fr); gap: 42px; }
.footer-brand { color: #fff; }
.footer-brand p { color: #a9c3d3; max-width: 370px; }
.footer-title { color: #fff; font-size: .9rem; font-weight: 880; letter-spacing: .08em; text-transform: uppercase; }
.footer-links { display: grid; gap: 9px; margin: 14px 0 0; padding: 0; list-style: none; }
.footer-links a { color: #bcd3e1; text-decoration: none; font-size: .92rem; }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 54px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: .84rem; color: #8da9ba; }

.sitemap-columns { columns: 3 260px; column-gap: 32px; }
.sitemap-group { break-inside: avoid; margin-bottom: 26px; }
.sitemap-group h2 { font-size: 1.25rem; margin-bottom: 10px; }
.sitemap-group ul { margin: 0; padding-left: 1.1rem; }
.sitemap-group a { color: #17638f; }

@media (max-width: 1040px) {
  .desktop-nav, .header-cta { display: none; }
  .menu-toggle { display: inline-flex; }
  .hero-grid, .page-hero-grid, .article-hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 760px; }
  .article-layout { grid-template-columns: minmax(0, 1fr); }
  .article-sidebar { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .blog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .section { padding: 70px 0; }
  .hero { padding: 50px 0 62px; }
  .nav-shell { min-height: 68px; }
  .brand-mark { width: 38px; height: 38px; }
  .grid.two, .grid.three, .grid.four, .blog-grid, .split, .contact-card { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sticky-side { position: static; }
  .article-sidebar { grid-template-columns: 1fr; }
  .article-hero { padding-top: 42px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; }
  .contact-side, .contact-main { padding: 28px; }
}
@media (max-width: 520px) {
  .shell, .narrow, .nav-shell, .mobile-nav { width: min(100% - 22px, var(--max)); }
  .mobile-nav { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .card, .content-panel { padding: 22px; }
  .callout { padding: 26px; }
  .stats-strip { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}