:root {
  --ink: #07151f;
  --ink-2: #0d2330;
  --paper: #f6f8f7;
  --white: #ffffff;
  --muted: #5c6b73;
  --line: #d9e1df;
  --ice: #7de7f2;
  --ice-dark: #0a7482;
  --gold: #e7ba62;
  --soft: #eaf1ef;
  --success: #146b58;
  --danger: #a64a3d;
  --shadow: 0 18px 44px rgba(7, 21, 31, .11);
  --radius: 18px;
  --radius-sm: 11px;
  --container: 1180px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--font); font-size: 17px; line-height: 1.65; text-rendering: optimizeLegibility; }
img, svg { display: block; max-width: 100%; }
a { color: var(--ice-dark); text-decoration-thickness: .08em; text-underline-offset: .18em; }
a:hover { color: #064f59; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.narrow { max-width: 790px; }
.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; left: 16px; top: -80px; padding: 10px 15px; border-radius: 8px; background: var(--gold); color: var(--ink); font-weight: 800; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; z-index: 100; top: 0; border-bottom: 1px solid rgba(255,255,255,.12); background: rgba(7,21,31,.96); backdrop-filter: blur(12px); }
.header-inner { display: flex; min-height: 76px; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--white); font-size: 21px; font-weight: 850; letter-spacing: -.04em; text-decoration: none; }
.brand span span { color: var(--ice); }
.site-nav { display: flex; align-items: center; gap: 23px; }
.site-nav > a:not(.button) { color: #dce9e9; font-size: 14px; font-weight: 700; text-decoration: none; }
.site-nav > a[aria-current="page"] { color: var(--ice); }
.menu-button { display: none; width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.25); border-radius: 10px; background: transparent; }
.menu-button > span:not(.sr-only) { width: 22px; height: 2px; margin: 5px auto; background: white; }

.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 11px 19px; border: 1px solid var(--ice); border-radius: 11px; background: var(--ice); color: var(--ink); font-weight: 800; line-height: 1.2; text-align: center; text-decoration: none; transition: transform .18s ease, background .18s ease; }
.button:hover { color: var(--ink); background: #a4f2fa; transform: translateY(-1px); }
.button-secondary { border-color: rgba(255,255,255,.28); background: transparent; color: white; }
.button-secondary:hover { background: rgba(255,255,255,.1); color: white; }
.button-small { min-height: 40px; padding: 8px 13px; font-size: 13px; }
.button-block { width: 100%; }
.text-link { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; }
.text-link svg, .link-card svg, .device-card > svg { width: 19px; fill: none; stroke: currentColor; stroke-width: 2; }

.breadcrumbs { padding-block: 17px; font-size: 14px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 7px; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 7px; color: #8a979c; }
.breadcrumbs a { color: var(--muted); }

.page-hero { overflow: hidden; padding: clamp(64px, 8vw, 112px) 0; background: var(--ink); color: white; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr); align-items: center; gap: 56px; }
.hero-visual { width: 100%; filter: drop-shadow(0 24px 54px rgba(0,0,0,.32)); }
.eyebrow { margin: 0 0 12px; color: var(--ice-dark); font-size: 13px; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.page-hero .eyebrow, .cta-panel .eyebrow { color: var(--ice); }
h1, h2, h3 { margin-top: 0; color: var(--ink); line-height: 1.12; letter-spacing: -.035em; }
h1 { max-width: 920px; margin-bottom: 22px; color: white; font-size: clamp(42px, 6vw, 76px); }
h2 { margin-bottom: 15px; font-size: clamp(29px, 3.6vw, 42px); }
h3 { margin-bottom: 9px; font-size: 21px; }
.lead { max-width: 760px; margin: 0; color: #d5e1e3; font-size: clamp(19px, 2.3vw, 24px); line-height: 1.5; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 31px; }
.large-copy { font-size: 20px; line-height: 1.65; }

.facts { margin-top: -1px; background: var(--ink-2); color: white; }
.facts-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.facts-grid > div { padding: 25px 20px; border-right: 1px solid rgba(255,255,255,.11); text-align: center; }
.facts-grid > div:last-child { border-right: 0; }
.facts strong { display: block; color: var(--ice); font-size: clamp(24px, 3vw, 36px); line-height: 1; }
.facts span { display: block; margin-top: 7px; color: #bed0d3; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }

.section { padding: clamp(62px, 8vw, 104px) 0; }
.section-soft { background: var(--soft); }
.section-head { max-width: 730px; margin-bottom: 36px; }
.section-head > p:last-child { color: var(--muted); font-size: 18px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .8fr); align-items: center; gap: 58px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; align-items: start; gap: 58px; }
.content-grid article > h2:not(:first-child), .article-body section + section { margin-top: 48px; }
.article-body > section { padding-bottom: 4px; }
.article-body p { font-size: 18px; }

.check-list { display: grid; gap: 12px; margin: 23px 0; padding: 0; list-style: none; }
.check-list li { display: flex; align-items: flex-start; gap: 11px; }
.check-list svg { flex: 0 0 22px; width: 22px; height: 22px; margin-top: 2px; fill: none; stroke: var(--success); stroke-width: 2.4; }
.aside-card { position: sticky; top: 100px; padding: 29px; border: 1px solid var(--line); border-radius: var(--radius); background: white; box-shadow: var(--shadow); }
.aside-card h2 { font-size: 25px; }
.aside-card h3 { margin-top: 28px; }
.aside-card dl { margin: 0 0 22px; }
.aside-card dl > div { display: flex; justify-content: space-between; gap: 12px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.aside-card dt { color: var(--muted); }
.aside-card dd { margin: 0; font-weight: 750; text-align: right; }
.callout { margin-top: 31px; padding: 23px 25px; border-left: 4px solid var(--gold); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: #fff7e8; }
.callout p { margin: 6px 0 0; }
.source-note { margin-top: 50px; padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: white; }
.source-note h2 { font-size: 26px; }
.topic-depth { margin: 40px 0; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: #f8fbfa; }
.topic-depth h2 { font-size: 28px; }
.topic-depth p { margin: 14px 0 0; }

.visual-seo-section { padding-top: 0; }
.visual-seo-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(300px, .55fr); align-items: center; gap: 42px; }
.page-visual-card { margin: 0; border: 1px solid var(--line); border-radius: var(--radius); background: white; box-shadow: var(--shadow); overflow: hidden; }
.page-visual-card img { width: 100%; height: auto; }
.page-visual-card figcaption { padding: 13px 18px; color: var(--muted); font-size: 14px; }
.page-visual-copy p:last-child { color: var(--muted); font-size: 18px; }

.plans { display: grid; grid-template-columns: repeat(5, 1fr); gap: 15px; }
.plan { position: relative; display: flex; flex-direction: column; min-height: 420px; padding: 26px 22px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: white; }
.plan-highlight { border: 2px solid var(--ice-dark); box-shadow: var(--shadow); }
.plan-badge { position: absolute; right: 14px; top: -14px; padding: 5px 9px; border-radius: 99px; background: var(--gold); color: var(--ink); font-size: 11px; font-weight: 850; letter-spacing: .05em; text-transform: uppercase; }
.plan h3 { font-size: 22px; }
.price { margin: 9px 0 0; color: var(--ink); font-size: 39px; font-weight: 850; letter-spacing: -.05em; }
.per-month { min-height: 48px; margin: 0; color: var(--muted); font-size: 14px; }
.plan ul { flex: 1; margin: 20px 0; padding: 0; list-style: none; }
.plan li { display: flex; gap: 8px; margin: 10px 0; font-size: 14px; }
.plan li svg { flex: 0 0 18px; width: 18px; fill: none; stroke: var(--success); stroke-width: 2.2; }
.fine-print { max-width: 870px; margin: 25px 0 0; color: var(--muted); font-size: 14px; }

.feature-grid, .card-grid, .device-grid, .symptom-grid, .diagnostic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card, .link-card, .device-card, .symptom-grid > a { position: relative; display: block; min-height: 190px; padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: white; color: var(--ink); text-decoration: none; transition: transform .18s ease, box-shadow .18s ease; }
.feature-card:hover, .link-card:hover, .device-card:hover, .symptom-grid > a:hover { color: var(--ink); transform: translateY(-3px); box-shadow: var(--shadow); }
.feature-icon { display: inline-grid; width: 54px; height: 54px; place-items: center; margin-bottom: 24px; border-radius: 14px; background: var(--ink); color: var(--ice); font-size: 11px; font-weight: 900; letter-spacing: .05em; }
.feature-card p, .device-card p, .symptom-grid p { color: var(--muted); }
.link-card { display: flex; min-height: 84px; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 23px; font-weight: 800; }
.link-card.tall { min-height: 135px; flex-wrap: wrap; }
.link-card small { width: 100%; color: var(--muted); font-weight: 500; }
.device-grid { grid-template-columns: repeat(4, 1fr); }
.device-card { min-height: 220px; }
.device-number { display: block; margin-bottom: 30px; color: var(--ice-dark); font-size: 13px; font-weight: 850; letter-spacing: .12em; }
.device-card > svg { position: absolute; right: 23px; bottom: 23px; }
.diagnostic-grid { grid-template-columns: repeat(4, 1fr); }
.diagnostic-grid > div { padding: 23px; border-top: 4px solid var(--ice-dark); background: white; }

.steps { display: grid; gap: 18px; margin: 25px 0 38px; padding: 0; list-style: none; }
.steps > li { display: grid; grid-template-columns: 45px 1fr; gap: 16px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: white; }
.steps > li > span { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 50%; background: var(--ink); color: var(--ice); font-weight: 850; }
.steps h3 { margin: 2px 0 4px; font-size: 17px; }
.steps p { margin: 0; }

.faq-list { display: grid; gap: 11px; }
.faq-list details { border: 1px solid var(--line); border-radius: var(--radius-sm); background: white; }
.faq-list summary { position: relative; padding: 19px 54px 19px 21px; cursor: pointer; font-weight: 780; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 21px; top: 14px; color: var(--ice-dark); font-size: 26px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details > div { padding: 0 21px 20px; }
.faq-list p { margin: 0; color: var(--muted); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: white; box-shadow: 0 10px 30px rgba(7,21,31,.06); }
table { width: 100%; border-collapse: collapse; min-width: 840px; }
caption { padding: 19px; color: var(--muted); font-weight: 700; text-align: left; }
th, td { padding: 17px 18px; border-top: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { border-top: 0; background: var(--ink); color: white; font-size: 14px; }
tbody tr:nth-child(even) { background: #f2f6f5; }

.symptom-grid > a { min-height: 185px; }
.status-dot { display: block; width: 12px; height: 12px; margin-bottom: 30px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 7px rgba(231,186,98,.2); }
.trouble-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 19px; }
.trouble-flow article { padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: white; }
.trouble-flow article > span { display: grid; width: 40px; height: 40px; place-items: center; margin-bottom: 22px; border-radius: 50%; background: var(--ink); color: var(--ice); font-weight: 850; }
.trouble-flow h2 { font-size: 26px; }

.cta-panel { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: clamp(32px, 5vw, 54px); border-radius: 26px; background: var(--ink); color: white; }
.cta-panel h2 { color: white; }
.cta-panel p { max-width: 720px; margin-bottom: 0; color: #c7d7d9; }
.contact-card { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 36px; border: 1px solid var(--line); border-radius: var(--radius); background: white; box-shadow: var(--shadow); }
.contact-label { color: var(--ice-dark); font-size: 13px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.contact-card h2 { margin: 7px 0; }
.contact-card p { margin: 0; color: var(--muted); }

.site-footer { padding: 64px 0 24px; background: var(--ink); color: #bfd0d2; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 48px; }
.footer-brand { margin-bottom: 18px; }
.footer-grid h2 { margin-bottom: 15px; color: white; font-size: 15px; letter-spacing: .02em; }
.footer-grid > div > a:not(.brand) { display: block; margin: 9px 0; color: #bfd0d2; font-size: 14px; text-decoration: none; }
.footer-grid p { max-width: 360px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 45px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); font-size: 12px; }
.floating-wa { position: fixed; z-index: 80; right: 20px; bottom: 20px; display: grid; width: 56px; height: 56px; place-items: center; border: 2px solid white; border-radius: 50%; background: #25d366; color: #092417; box-shadow: 0 10px 30px rgba(0,0,0,.2); font-size: 13px; font-weight: 900; text-decoration: none; }
.floating-wa:hover { color: #092417; transform: translateY(-2px); }

@media (max-width: 1060px) {
  .site-nav { gap: 15px; }
  .site-nav > a:not(.button) { font-size: 13px; }
  .plans { grid-template-columns: repeat(3, 1fr); }
  .device-grid { grid-template-columns: repeat(3, 1fr); }
  .diagnostic-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  body { font-size: 16px; }
  .container { width: min(calc(100% - 28px), var(--container)); }
  .menu-button { display: block; }
  .site-nav { position: absolute; left: 14px; right: 14px; top: 68px; display: none; padding: 17px; border: 1px solid rgba(255,255,255,.16); border-radius: 14px; background: var(--ink-2); box-shadow: var(--shadow); }
  .site-nav.is-open { display: grid; }
  .site-nav > a { min-height: 44px; display: flex; align-items: center; padding-inline: 9px; }
  .hero-grid, .split, .content-grid, .visual-seo-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 34px; }
  .hero-visual { max-width: 560px; }
  .aside-card { position: static; }
  .facts-grid { grid-template-columns: repeat(2, 1fr); }
  .facts-grid > div:nth-child(2) { border-right: 0; }
  .facts-grid > div:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.11); }
  .plans, .feature-grid, .card-grid, .device-grid, .symptom-grid, .trouble-flow { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-panel, .contact-card { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  h1 { font-size: 42px; }
  .page-hero { padding: 58px 0; }
  .hero-actions { display: grid; }
  .facts-grid, .plans, .feature-grid, .card-grid, .device-grid, .symptom-grid, .diagnostic-grid, .trouble-flow, .footer-grid { grid-template-columns: 1fr; }
  .facts-grid > div { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.11); }
  .facts-grid > div:last-child { border-bottom: 0; }
  .plan { min-height: 0; }
  .plan ul { flex: initial; }
  .footer-bottom { flex-direction: column; }
  .floating-wa { right: 14px; bottom: 14px; width: 50px; height: 50px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}