:root {
  color-scheme: dark;
  --bg: #071017;
  --panel: rgba(8, 18, 25, 0.93);
  --line: rgba(255, 255, 255, 0.16);
  --line-strong: rgba(255, 255, 255, 0.3);
  --text: #f5f8fa;
  --muted: #a9bac4;
  --cyan: #5ed9f2;
  --coral: #ff806d;
  --mint: #78e0bc;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header,
.brand,
.header-links,
.header-cta,
.panel-heading,
.primary-entry,
.secondary-entry,
.platform-row a,
.scroll-cue,
.site-footer,
.site-footer div,
.decision-link,
.decision-button,
.platform-card-link { display: flex; align-items: center; }

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 76px;
  justify-content: space-between;
  gap: 24px;
  padding: 12px clamp(22px, 5vw, 76px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.brand { flex: 0 0 auto; gap: 12px; font-weight: 800; }
.brand-mark { display: grid; width: 38px; height: 38px; place-items: center; border: 1px solid rgba(255,255,255,.5); background: #f5f8fa; color: #071017; font-size: 15px; }
.brand-name { font-size: 17px; }
.header-links { flex-wrap: wrap; justify-content: flex-end; gap: 22px; color: #dce7ec; font-size: 14px; }
.header-links > a:not(.header-cta):hover { color: #fff; }
.header-cta { min-height: 40px; flex: 0 0 auto; gap: 8px; padding: 0 15px; border: 1px solid rgba(255,255,255,.5); background: rgba(4,12,17,.5); white-space: nowrap; }
.header-cta:hover { border-color: var(--cyan); color: var(--cyan); }
.header-cta svg, .text-link svg, .decision-link svg, .decision-button svg { width: 16px; height: 16px; }

.hero { position: relative; min-height: 700px; overflow: hidden; background: url("assets/t3-network-hero.webp") center 54% / cover no-repeat; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2,10,16,.86) 0%, rgba(2,10,16,.66) 56%, rgba(2,10,16,.4) 100%); }
.hero-inner { position: relative; z-index: 1; display: grid; width: min(1240px, calc(100% - 44px)); min-height: 700px; grid-template-columns: minmax(0, 610px) minmax(280px, 365px); justify-content: space-between; align-items: center; gap: 50px; margin: 0 auto; padding: 116px 0 88px; }
.eyebrow, .panel-kicker, .facts-label, .section-index { margin: 0; color: var(--cyan); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.signal-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 16px rgba(120,224,188,.75); }
.hero-copy > h1 { margin: 0; font-size: 84px; line-height: .95; font-weight: 900; }
.hero-lead { max-width: 560px; margin: 20px 0 28px; color: #d4e0e6; font-size: 19px; line-height: 1.65; }
.entry-panel { width: min(100%, 590px); padding: 24px; border: 1px solid var(--line-strong); border-radius: 6px; background: var(--panel); box-shadow: 0 24px 70px rgba(0,0,0,.32); backdrop-filter: blur(16px); }
.panel-heading { justify-content: space-between; margin-bottom: 18px; }
.panel-heading h2 { margin: 5px 0 0; font-size: 21px; }
.icon-button { display: grid; width: 40px; height: 40px; flex: 0 0 auto; place-items: center; padding: 0; border: 1px solid var(--line); background: transparent; color: var(--text); cursor: pointer; }
.icon-button:hover, .icon-button:focus-visible { border-color: var(--cyan); color: var(--cyan); }
.icon-button svg { width: 18px; height: 18px; }
.primary-entry, .secondary-entry { position: relative; min-height: 72px; gap: 13px; padding: 12px 14px; border: 1px solid var(--line); }
.primary-entry { background: var(--text); color: #071017; }
.secondary-entry { margin-top: 9px; background: rgba(255,255,255,.04); }
.primary-entry:hover, .secondary-entry:hover { border-color: var(--cyan); }
.entry-icon { display: grid; width: 40px; height: 40px; flex: 0 0 40px; place-items: center; background: #071017; color: var(--cyan); }
.secondary-entry .entry-icon { background: rgba(94,217,242,.12); }
.entry-icon svg { width: 19px; height: 19px; }
.entry-text { display: grid; min-width: 0; gap: 4px; }
.entry-text strong { font-size: 14px; }
.entry-text small { color: #55707d; font-size: 12px; line-height: 1.4; }
.secondary-entry .entry-text small { color: var(--muted); }
.entry-arrow { width: 18px; height: 18px; flex: 0 0 auto; margin-left: auto; }
.platform-row { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; margin-top: 16px; border: 1px solid var(--line); background: var(--line); }
.platform-row a { min-width: 0; min-height: 52px; justify-content: center; gap: 7px; background: #0b1820; color: #dce7ec; font-size: 12px; }
.platform-row a:hover { background: #102732; color: var(--cyan); }
.platform-row svg { width: 16px; height: 16px; flex: 0 0 auto; }
.external-notice { margin: 12px 0 0; color: #a9bac4; font-size: 11px; line-height: 1.6; }
.external-notice a { color: #c8f4fb; text-decoration: underline; text-underline-offset: 2px; }

.hero-facts { align-self: center; padding: 28px 0 28px 28px; border-left: 1px solid rgba(255,255,255,.28); }
.facts-label { color: var(--coral); }
.hero-facts h2 { margin: 12px 0 22px; font-size: 34px; line-height: 1.25; }
.hero-facts ul { display: grid; gap: 15px; margin: 0; padding: 0; list-style: none; }
.hero-facts li { display: grid; grid-template-columns: 21px minmax(0,1fr); gap: 11px; color: #cfdae0; font-size: 13px; line-height: 1.6; }
.hero-facts li svg { width: 18px; height: 18px; margin-top: 2px; color: var(--cyan); }
.mini-stats { display: grid; grid-template-columns: .6fr 1.2fr .6fr; gap: 12px; margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--line); }
.mini-stats div { display: grid; gap: 4px; }
.mini-stats strong { font-size: 19px; }
.mini-stats span { color: var(--muted); font-size: 10px; line-height: 1.4; }
.fact-note { margin: 14px 0 0; color: #a9bac4; font-size: 10px; line-height: 1.5; }
.scroll-cue { position: absolute; z-index: 2; right: 30px; bottom: 18px; gap: 8px; color: #dbe6eb; font-size: 12px; }
.scroll-cue svg { width: 16px; height: 16px; }

.guide-band { display: grid; min-height: 330px; grid-template-columns: minmax(190px,.7fr) minmax(480px,1.8fr) auto; align-items: center; gap: 52px; padding: 66px clamp(22px,5vw,76px); background: #f0f3f4; color: #0b151b; }
.section-intro h2, .section-heading h2, .decision-copy h2 { margin: 9px 0 0; font-size: 34px; line-height: 1.2; }
.section-index { color: #126b7d; }
.steps { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 25px; margin: 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 28px minmax(0,1fr); gap: 10px; }
.steps li > span { color: #126b7d; font-size: 12px; font-weight: 800; }
.steps strong { font-size: 15px; }
.steps p { margin: 7px 0 0; color: #53646d; font-size: 12px; line-height: 1.65; }
.text-link { gap: 8px; white-space: nowrap; color: #b53f31; font-size: 13px; font-weight: 800; }
.text-link:hover { color: #7d2218; }

.content-section { padding: 80px clamp(22px,5vw,76px) 76px; background: #f8fafb; color: #0b151b; }
.section-heading { width: min(100%,800px); margin: 0 auto 32px; }
.section-heading h2 { max-width: 680px; }
.section-heading > p:last-child { max-width: 680px; margin: 12px 0 0; color: #53646d; font-size: 14px; line-height: 1.7; }
.platform-grid { display: grid; width: min(100%,1100px); grid-template-columns: repeat(4,minmax(0,1fr)); gap: 1px; margin: 0 auto; border: 1px solid #d6e0e4; background: #d6e0e4; }
.platform-card { display: grid; min-width: 0; min-height: 240px; align-content: start; gap: 12px; padding: 22px 18px; background: #fff; }
.platform-card > svg { width: 23px; height: 23px; color: #126b7d; }
.platform-card-title { font-size: 17px; font-weight: 800; }
.platform-card-copy { min-height: 66px; color: #53646d; font-size: 13px; line-height: 1.65; }
.platform-card-link { gap: 7px; align-self: end; color: #b53f31; font-size: 12px; font-weight: 750; }
.platform-card-link svg { width: 15px; height: 15px; }
.platform-card:hover .platform-card-link { color: #7d2218; }
.section-footnote { width: min(100%,1100px); margin: 16px auto 0; color: #53646d; font-size: 12px; line-height: 1.6; }
.section-footnote a { color: #126b7d; text-decoration: underline; text-underline-offset: 2px; }

.scenario-section { padding: 76px clamp(22px,5vw,76px) 68px; background: #fff; color: #0b151b; }
.scenario-heading { width: min(100%,1100px); margin: 0 auto 28px; }
.scenario-heading h2 { max-width: 720px; margin: 9px 0 0; font-size: 32px; line-height: 1.2; }
.scenario-heading > p:last-child { max-width: 720px; margin: 12px 0 0; color: #53646d; font-size: 14px; line-height: 1.7; }
.scenario-links { display: grid; width: min(100%,1100px); grid-template-columns: repeat(3,minmax(0,1fr)); margin: 0 auto; border-top: 1px solid #d6e0e4; }
.scenario-links a { display: grid; min-width: 0; align-content: start; gap: 8px; padding: 20px 22px 20px 0; border-bottom: 1px solid #d6e0e4; }
.scenario-links a strong { font-size: 16px; line-height: 1.45; }
.scenario-links a > span:last-child { color: #53646d; font-size: 12px; line-height: 1.6; }
.scenario-links a > span:last-child svg { width: 14px; height: 14px; margin-left: 3px; color: #b53f31; vertical-align: -3px; }
.scenario-label { color: #126b7d; font-size: 10px; font-weight: 800; }
.scenario-links a:hover strong { color: #126b7d; }
.scenario-note { width: min(100%,1100px); margin: 18px auto 0; color: #687982; font-size: 11px; line-height: 1.6; }

.decision-band { display: grid; grid-template-columns: minmax(0,1.4fr) minmax(270px,.8fr); align-items: center; gap: 60px; padding: 72px clamp(22px,10vw,150px); background: #dce8e9; color: #0b151b; }
.decision-copy h2 { max-width: 620px; }
.decision-copy > p:not(.section-index) { max-width: 690px; margin: 15px 0 18px; color: #455a62; font-size: 14px; line-height: 1.8; }
.decision-check-title { margin: 24px 0 10px; font-size: 15px; }
.decision-checklist { display: grid; gap: 10px; margin: 0 0 18px; padding: 0; counter-reset: decision-step; list-style: none; }
.decision-checklist li { display: grid; grid-template-columns: 24px minmax(0,1fr); gap: 10px; color: #455a62; font-size: 13px; line-height: 1.7; }
.decision-checklist li::before { counter-increment: decision-step; content: counter(decision-step, decimal-leading-zero); color: #126b7d; font-size: 11px; font-weight: 800; }
.decision-copy > p a { color: #126b7d; text-decoration: underline; text-underline-offset: 2px; }
.decision-link { width: fit-content; gap: 8px; color: #126b7d; font-size: 13px; font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.decision-action { display: grid; gap: 13px; padding-left: 24px; border-left: 1px solid #b5c7ca; }
.decision-action p { margin: 0; color: #455a62; font-size: 13px; line-height: 1.65; }
.decision-button { width: fit-content; min-height: 46px; justify-content: center; gap: 9px; padding: 0 15px; background: #0b151b; color: #fff; font-size: 13px; font-weight: 800; }
.decision-button:hover { background: #126b7d; }
.decision-action small { color: #53646d; font-size: 11px; line-height: 1.5; }

.faq-section { padding: 76px clamp(22px,5vw,76px) 90px; background: #fff; color: #0b151b; }
.faq-section .section-heading { margin-bottom: 24px; }
.faq-list { width: min(100%,800px); margin: 0 auto; border-top: 1px solid #d6e0e4; }
.faq-list details { border-bottom: 1px solid #d6e0e4; }
.faq-list summary { position: relative; padding: 18px 38px 18px 0; cursor: pointer; font-size: 15px; font-weight: 750; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; right: 6px; content: "+"; color: #126b7d; font-size: 22px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 740px; margin: -3px 0 18px; color: #53646d; font-size: 13px; line-height: 1.75; }
.faq-list details p a { color: #126b7d; text-decoration: underline; text-underline-offset: 2px; }
.site-footer { min-height: 74px; justify-content: space-between; gap: 20px; padding: 15px clamp(22px,5vw,76px); color: #8798a2; font-size: 12px; }
.site-footer div { flex-wrap: wrap; gap: 22px; }
.site-footer a:hover { color: var(--cyan); }
.toast { position: fixed; z-index: 20; left: 50%; bottom: 24px; max-width: calc(100% - 32px); padding: 11px 16px; transform: translate(-50%,20px); background: #f5f8fa; color: #071017; font-size: 13px; opacity: 0; pointer-events: none; transition: opacity 180ms ease,transform 180ms ease; }
.toast.visible { transform: translate(-50%,0); opacity: 1; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: minmax(0,1fr); align-content: center; gap: 36px; padding-top: 116px; }
  .hero-facts { max-width: 650px; border-left: 0; border-top: 1px solid rgba(255,255,255,.3); padding: 23px 0 10px; }
  .hero-facts h2 { font-size: 28px; }
  .guide-band { grid-template-columns: 1fr; gap: 28px; }
  .section-intro h2 { max-width: 680px; }
  .text-link { justify-self: start; }
  .platform-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .scenario-links { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 640px) {
  .site-header { min-height: 64px; padding: 10px 16px; }
  .brand { gap: 8px; }
  .brand-mark { width: 33px; height: 33px; }
  .brand-name { font-size: 13px; }
  .header-links { gap: 8px; }
  .header-links > a:not(.header-cta) { display: none; }
  .header-cta { min-height: 36px; padding: 0 10px; font-size: 11px; }
  .hero { min-height: 760px; background-position: 63% center; }
  .hero-inner { width: calc(100% - 28px); min-height: 760px; gap: 25px; padding: 94px 0 68px; }
  .hero-copy > h1 { font-size: 58px; }
  .hero-lead { margin: 15px 0 21px; font-size: 15px; }
  .entry-panel { padding: 15px; }
  .panel-heading h2 { font-size: 18px; }
  .primary-entry, .secondary-entry { min-height: 66px; gap: 10px; padding: 10px; }
  .entry-icon { width: 34px; height: 34px; flex-basis: 34px; }
  .entry-text strong { font-size: 12px; }
  .entry-text small { font-size: 10px; }
  .platform-row { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .platform-row a { min-height: 46px; }
  .hero-facts { padding: 19px 0 2px; }
  .hero-facts h2 { margin: 8px 0 15px; font-size: 24px; }
  .hero-facts ul { gap: 10px; }
  .hero-facts li { font-size: 11px; }
  .mini-stats { margin-top: 16px; padding-top: 13px; }
  .mini-stats strong { font-size: 16px; }
  .mini-stats span, .fact-note { font-size: 9px; }
  .scroll-cue { right: 16px; bottom: 10px; font-size: 10px; }
  .guide-band { gap: 23px; padding: 46px 20px; }
  .section-intro h2, .section-heading h2, .decision-copy h2 { font-size: 27px; }
  .steps { grid-template-columns: 1fr; gap: 18px; }
  .steps p { font-size: 12px; }
  .content-section, .faq-section, .scenario-section { padding: 52px 20px; }
  .section-heading { margin-bottom: 22px; }
  .section-heading > p:last-child { font-size: 13px; }
  .platform-grid { grid-template-columns: 1fr; }
  .scenario-heading h2 { font-size: 27px; }
  .scenario-heading > p:last-child { font-size: 13px; }
  .scenario-links { grid-template-columns: 1fr; }
  .scenario-links a { padding: 16px 0; }
  .platform-card { min-height: 0; gap: 8px; padding: 17px; }
  .platform-card-copy { min-height: 0; }
  .platform-card-link { margin-top: 5px; }
  .section-footnote { font-size: 11px; }
  .decision-band { grid-template-columns: 1fr; gap: 28px; padding: 48px 20px; }
  .decision-copy > p:not(.section-index) { font-size: 13px; }
  .decision-action { padding: 20px 0 0; border-top: 1px solid #b5c7ca; border-left: 0; }
  .decision-button { width: 100%; }
  .faq-list summary { font-size: 13px; }
  .faq-list details p { font-size: 12px; }
  .site-footer { align-items: flex-start; flex-direction: column; padding: 19px 20px; }
  .site-footer div { gap: 15px; }
}

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