:root {
  color-scheme: dark;
  --ink: #f8fafc;
  --muted: #9fb0c5;
  --dim: #6f8197;
  --night: #030b17;
  --panel: #071321;
  --panel-2: #0a1b2f;
  --blue: #19b5ef;
  --blue-deep: #2563eb;
  --orange: #fb923c;
  --line: rgba(159, 176, 197, .17);
  --line-strong: rgba(25, 181, 239, .32);
  --max: min(1180px, calc(100% - 40px));
  --reading: 72ch;
  --radius: 18px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--night); }
body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 8% 4%, rgba(25, 181, 239, .09), transparent 34rem),
    radial-gradient(circle at 92% 36%, rgba(251, 146, 60, .055), transparent 30rem),
    var(--night);
  color: var(--ink);
  font-family: "Atkinson Hyperlegible", system-ui, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select { font: inherit; }
button { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
  font-family: "Orbitron", "Atkinson Hyperlegible", sans-serif;
  line-height: 1.14;
  text-wrap: balance;
}
::selection { background: var(--blue); color: var(--night); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }
.shell { width: var(--max); margin-inline: auto; }
.reading { width: min(var(--reading), calc(100% - 40px)); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; z-index: 1000; top: 12px; left: 12px; padding: .65rem 1rem;
  border-radius: 10px; background: var(--orange); color: var(--night);
  font-weight: 700; transform: translateY(-160%); transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky; z-index: 80; top: 0; border-bottom: 1px solid var(--line);
  background: rgba(3, 11, 23, .88); backdrop-filter: blur(18px) saturate(130%);
}
.nav { display: flex; min-height: 72px; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .72rem; color: var(--ink); text-decoration: none; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand strong { font-family: "Orbitron", sans-serif; font-size: .95rem; letter-spacing: .12em; }
.nav-links { display: flex; align-items: center; gap: clamp(.85rem, 2.5vw, 1.75rem); }
.nav-links a { color: var(--muted); font-weight: 700; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links .nav-cta { color: var(--night); }
.nav-toggle { display: none; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); padding: .6rem .8rem; }

.button {
  display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: .55rem;
  padding: .76rem 1.12rem; border: 1px solid transparent; border-radius: 12px;
  font-weight: 800; line-height: 1.15; text-decoration: none; cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: linear-gradient(135deg, var(--blue), #67d4ff); color: var(--night); }
.button-secondary { border-color: var(--line-strong); background: rgba(25, 181, 239, .07); color: var(--ink); }
.eyebrow {
  color: var(--orange); font-family: "Orbitron", sans-serif; font-size: .74rem;
  font-weight: 700; letter-spacing: .13em; text-transform: uppercase;
}

.blog-hero { padding: clamp(4.4rem, 9vw, 8rem) 0 clamp(3.5rem, 7vw, 6rem); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); align-items: end; gap: clamp(2rem, 7vw, 7rem); }
.blog-hero h1 { max-width: 12ch; margin-bottom: 1.35rem; font-size: clamp(2.8rem, 7vw, 6.6rem); letter-spacing: -.055em; }
.blog-hero h1 em { color: var(--blue); font-style: normal; }
.hero-lead { max-width: 59ch; color: var(--muted); font-size: clamp(1.15rem, 2vw, 1.35rem); }
.answer-path { padding: 1.25rem; border: 1px solid var(--line-strong); border-radius: var(--radius); background: linear-gradient(145deg, rgba(10,27,47,.88), rgba(7,19,33,.55)); }
.answer-path ol { display: grid; gap: .65rem; margin: 0; padding: 0; list-style: none; }
.answer-path li { display: grid; grid-template-columns: 34px 1fr; align-items: center; gap: .8rem; color: var(--muted); }
.answer-path li + li::before { content: ""; position: absolute; }
.answer-path b { display: grid; width: 34px; height: 34px; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--blue); font-family: "Orbitron", sans-serif; font-size: .68rem; }
.answer-path strong { color: var(--ink); }

.filter-section { padding-block: 1.25rem 3rem; }
.search-box { display: grid; grid-template-columns: 1fr auto; gap: .75rem; max-width: 700px; }
.search-box input { width: 100%; min-height: 52px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--ink); padding: .8rem 1rem; }
.category-list { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.1rem; }
.chip { padding: .5rem .8rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); text-decoration: none; }
.chip:hover { border-color: var(--line-strong); color: var(--ink); }

.section { padding: clamp(3.5rem, 8vw, 7rem) 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2rem; }
.section-head h2 { max-width: 15ch; margin-bottom: 0; font-size: clamp(2rem, 4vw, 4rem); letter-spacing: -.04em; }
.section-head p { max-width: 44ch; margin-bottom: .25rem; color: var(--muted); }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; }
.article-card { display: flex; min-height: 100%; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(7,19,33,.72); overflow: hidden; }
.article-card:hover { border-color: var(--line-strong); }
.card-visual { display: grid; min-height: 180px; place-items: center; background: linear-gradient(145deg, rgba(25,181,239,.14), rgba(251,146,60,.07)); }
.card-visual span { font-family: "Orbitron", sans-serif; color: rgba(248,250,252,.18); font-size: clamp(2.5rem, 6vw, 4.5rem); letter-spacing: -.08em; }
.card-body { display: flex; flex: 1; flex-direction: column; padding: 1.2rem; }
.card-meta { color: var(--orange); font-size: .78rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.article-card h3 { margin: .55rem 0 .8rem; font-size: 1.22rem; letter-spacing: -.02em; }
.article-card p { color: var(--muted); }
.card-link { margin-top: auto; color: var(--blue); font-weight: 800; text-decoration: none; }
.empty-state { grid-column: 1/-1; padding: clamp(2rem, 6vw, 4rem); border: 1px dashed var(--line-strong); border-radius: var(--radius); background: rgba(7,19,33,.45); }
.empty-state h3 { margin-bottom: .7rem; }
.empty-state p { max-width: 60ch; color: var(--muted); }

.category-rail { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.category-tile { min-height: 210px; padding: 1.3rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; }
.category-tile span { color: var(--orange); font-family: "Orbitron", sans-serif; font-size: .7rem; }
.category-tile h3 { margin: 2.8rem 0 .8rem; font-size: 1rem; }
.category-tile p { color: var(--muted); font-size: .95rem; }
.category-tile:hover { background: rgba(25,181,239,.06); }

.conversion-band { border-block: 1px solid var(--line); background: linear-gradient(90deg, rgba(25,181,239,.1), rgba(251,146,60,.05)); }
.conversion-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; padding-block: clamp(2.6rem,6vw,4.5rem); }
.conversion-inner h2 { max-width: 18ch; margin-bottom: .8rem; font-size: clamp(1.8rem,3vw,3.2rem); }
.conversion-inner p { max-width: 62ch; margin-bottom: 0; color: var(--muted); }

.crumbs { padding-top: 1.2rem; color: var(--dim); font-size: .9rem; }
.crumbs ol { display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; list-style: none; }
.crumbs li:not(:last-child)::after { content: "/"; margin-left: .4rem; color: var(--line-strong); }
.crumbs a { color: var(--muted); }
.article-header { padding: clamp(3.2rem,7vw,6rem) 0 2.6rem; }
.article-header h1 { max-width: 19ch; margin-bottom: 1rem; font-size: clamp(2.3rem,5.5vw,5.2rem); letter-spacing: -.05em; }
.article-subtitle { max-width: 64ch; color: var(--muted); font-size: clamp(1.12rem,2vw,1.32rem); }
.byline { display: flex; flex-wrap: wrap; gap: .5rem 1rem; margin-top: 1.5rem; color: var(--dim); font-size: .95rem; }
.article-cover { aspect-ratio: 16/7; margin-bottom: 3rem; border: 1px solid var(--line); border-radius: var(--radius); object-fit: cover; background: var(--panel); }
.article-layout { display: grid; grid-template-columns: 210px minmax(0,var(--reading)); justify-content: center; gap: clamp(2rem,5vw,5rem); align-items: start; }
.toc { position: sticky; top: 96px; padding-left: 1rem; border-left: 1px solid var(--line); }
.toc strong { display: block; margin-bottom: .7rem; font-family: "Orbitron", sans-serif; font-size: .72rem; letter-spacing: .08em; }
.toc a { display: block; padding: .3rem 0; color: var(--muted); font-size: .9rem; line-height: 1.35; text-decoration: none; }
.prose { min-width: 0; }
.prose h2 { margin: 3.4rem 0 1rem; font-size: clamp(1.55rem,3vw,2.35rem); letter-spacing: -.03em; scroll-margin-top: 100px; }
.prose h3 { margin: 2.2rem 0 .8rem; font-size: 1.2rem; }
.prose p, .prose li { color: #d6dfeb; }
.prose a { color: #71d7ff; text-underline-offset: 3px; }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.prose th, .prose td { padding: .75rem; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.table-scroll { overflow-x: auto; }
.quick-answer, .takeaways, .experience {
  margin: 2rem 0; padding: 1.3rem 1.4rem; border: 1px solid var(--line-strong);
  border-radius: var(--radius); background: rgba(25,181,239,.06);
}
.quick-answer strong, .takeaways > strong, .experience > strong { color: var(--orange); font-family: "Orbitron", sans-serif; font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; }
.quick-answer p:last-child, .experience p:last-child { margin-bottom: 0; }
.article-cta { margin: 3rem 0; padding: clamp(1.4rem,4vw,2.2rem); border: 1px solid rgba(251,146,60,.34); border-radius: var(--radius); background: linear-gradient(145deg,rgba(251,146,60,.08),rgba(7,19,33,.9)); }
.article-cta h2 { margin-top: 0; }
.source-list { font-size: .92rem; }
.related { margin-top: 5rem; padding-top: 2rem; border-top: 1px solid var(--line); }

.commercial-hero { padding: clamp(4rem,9vw,8rem) 0; }
.commercial-grid { display: grid; grid-template-columns: 1fr minmax(310px,.72fr); gap: clamp(2rem,7vw,7rem); align-items: center; }
.commercial-hero h1 { max-width: 13ch; margin-bottom: 1.2rem; font-size: clamp(2.65rem,6.5vw,6.1rem); letter-spacing: -.055em; }
.commercial-hero h1 em { color: var(--blue); font-style: normal; }
.commercial-hero p { max-width: 58ch; color: var(--muted); font-size: 1.2rem; }
.button-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }
.flow-panel { padding: 1.3rem; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--panel); }
.flow-step { display: grid; grid-template-columns: 42px 1fr; gap: .85rem; padding: .9rem 0; }
.flow-step + .flow-step { border-top: 1px solid var(--line); }
.flow-step b { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 12px; background: rgba(25,181,239,.12); color: var(--blue); font-family: "Orbitron",sans-serif; }
.flow-step p { margin: .18rem 0 0; font-size: .95rem; }
.proof-note { padding: 1rem 1.2rem; border-left: 3px solid var(--orange); background: rgba(251,146,60,.06); color: var(--muted); }
.price-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.price-card { padding: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(7,19,33,.75); }
.price-card.featured { border-color: var(--line-strong); box-shadow: inset 0 3px var(--blue); }
.price { font-family: "Orbitron",sans-serif; font-size: clamp(1.8rem,3vw,2.8rem); }
.price small { color: var(--muted); font-family: inherit; font-size: .9rem; }
.price-card ul { padding-left: 1.2rem; color: var(--muted); }
.faq details, .article-faq details { border-top: 1px solid var(--line); padding: 1rem 0; }
.faq details:last-child, .article-faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary, .article-faq summary { color: var(--ink); font-family: "Orbitron",sans-serif; font-size: .9rem; cursor: pointer; }
.faq details p, .article-faq details p { max-width: 68ch; margin: .8rem 0 0; color: var(--muted); }
.review-banner { margin: 0; padding: .8rem 1rem; color: #07111d; background: var(--orange); text-align: center; }

.diagnostic { padding-bottom: clamp(4rem,8vw,7rem); }
.diagnostic-form { display: grid; gap: 1.25rem; max-width: 760px; }
.diagnostic-form fieldset { margin: 0; padding: 1.2rem; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(7,19,33,.66); }
.diagnostic-form legend { padding: 0 .35rem; color: var(--ink); font-family: "Orbitron",sans-serif; font-size: .9rem; }
.diagnostic-form label { display: grid; gap: .45rem; color: var(--muted); font-weight: 700; }
.diagnostic-form input:not([type="checkbox"]), .diagnostic-form select, .diagnostic-form textarea {
  width: 100%; min-height: 50px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--night); color: var(--ink); padding: .75rem .85rem;
}
.diagnostic-form textarea { min-height: 110px; resize: vertical; }
.check-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .65rem; }
.check-grid label { display: flex; align-items: center; gap: .5rem; padding: .65rem; border: 1px solid var(--line); border-radius: 10px; }
.diagnostic-result { margin-top: 2rem; padding: clamp(1.4rem,4vw,2.2rem); border: 1px solid var(--line-strong); border-radius: var(--radius); background: rgba(25,181,239,.07); }
.diagnostic-result[hidden] { display: none; }

.site-footer { padding: 2.5rem 0; border-top: 1px solid var(--line); color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: start; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-links a { color: var(--muted); }
.mobile-contact { display: none; }
body[data-page="diagnostic"] .mobile-contact { display: none !important; }

@media (max-width: 900px) {
  .hero-grid, .commercial-grid { grid-template-columns: 1fr; }
  .answer-path { max-width: 620px; }
  .card-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .category-rail { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .article-layout { grid-template-columns: 1fr; }
  .toc { position: static; width: min(var(--reading),100%); margin-inline: auto; }
}

@media (max-width: 680px) {
  :root { --max: min(100% - 28px, 1180px); }
  body { font-size: 1rem; }
  .nav-toggle { display: inline-flex; }
  .nav-links { position: absolute; inset: 72px 0 auto; display: none; flex-direction: column; align-items: stretch; padding: 1rem 20px 1.4rem; border-bottom: 1px solid var(--line); background: rgba(3,11,23,.98); }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: .65rem; }
  .section-head, .conversion-inner, .footer-grid { display: grid; grid-template-columns: 1fr; align-items: start; }
  .card-grid, .price-grid { grid-template-columns: 1fr; }
  .check-grid { grid-template-columns: 1fr; }
  .category-rail { grid-template-columns: 1fr; }
  .search-box { grid-template-columns: 1fr; }
  .article-cover { aspect-ratio: 4/3; }
  .mobile-contact { position: fixed; z-index: 70; right: 14px; bottom: 14px; display: inline-flex; box-shadow: 0 14px 34px rgba(0,0,0,.42); }
  .site-footer { padding-bottom: 6rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; }
}