:root {
  --ink: #f5f8ff;
  --muted: #929caf;
  --night: #05070b;
  --panel: #0d1119;
  --panel-2: #151c28;
  --line: rgba(185, 203, 224, .16);
  --line-strong: rgba(185, 203, 224, .3);
  --teal: #69f5d0;
  --orange: #ffb45c;
  --violet: #8f83ff;
  --content: 1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--night);
  color-scheme: dark;
  scroll-behavior: smooth;
}

* { box-sizing: border-box; }
html { background: var(--night); }
body { margin: 0; min-width: 320px; background: var(--night); color: var(--ink); }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.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: 100; top: 12px; left: 12px; transform: translateY(-150%); padding: 10px 14px; border-radius: 8px; background: var(--teal); color: #031b16; font-weight: 800; }
.skip-link:focus { transform: translateY(0); }

.site-header { position: fixed; z-index: 20; inset: 0 0 auto; display: flex; align-items: center; justify-content: space-between; min-height: 76px; padding: 12px max(24px, calc((100vw - var(--content)) / 2)); border-bottom: 1px solid transparent; transition: background .25s ease, border-color .25s ease; }
.site-header.scrolled { background: rgba(5, 7, 11, .84); border-color: var(--line); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--teal); border-radius: 13px 4px 13px 4px; color: var(--teal); font-size: .7rem; font-weight: 900; letter-spacing: .08em; }
.brand-name { font-size: .92rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: clamp(20px, 3vw, 38px); }
.main-nav a { color: #cbd3e1; font-size: .84rem; font-weight: 700; text-decoration: none; }
.main-nav a:hover, .main-nav a:focus-visible { color: var(--teal); }
.main-nav .nav-cta { padding: 10px 15px; border: 1px solid rgba(105, 245, 208, .35); border-radius: 9px; color: var(--teal); }
.menu-button { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px; background: transparent; }
.menu-button span:not(.sr-only) { display: block; width: 19px; height: 1px; margin: 5px auto; background: var(--ink); }

.hero { position: relative; isolation: isolate; min-height: 780px; display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(360px, .88fr); align-items: center; gap: clamp(50px, 8vw, 110px); max-width: 1440px; margin: 0 auto; padding: 140px max(24px, calc((100% - var(--content)) / 2)) 100px; overflow: hidden; }
.hero::before { content: ""; position: absolute; z-index: -2; width: 760px; height: 760px; top: -260px; right: -170px; border-radius: 50%; background: radial-gradient(circle, rgba(143, 131, 255, .16), transparent 64%); }
.hero-grid { position: absolute; z-index: -3; inset: 0; opacity: .42; background-image: linear-gradient(rgba(185,203,224,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(185,203,224,.05) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to bottom, black, transparent 85%); }
.hero-orbit { position: absolute; z-index: -1; border: 1px solid rgba(105,245,208,.1); border-radius: 50%; pointer-events: none; }
.orbit-one { width: 420px; height: 420px; right: 5%; top: 25%; }
.orbit-two { width: 610px; height: 610px; right: -2%; top: 13%; border-color: rgba(143,131,255,.1); }
.hero-copy { max-width: 730px; }
.eyebrow { margin: 0 0 20px; color: var(--teal); font-size: .76rem; font-weight: 850; letter-spacing: .17em; text-transform: uppercase; }
.eyebrow span { display: inline-block; width: 28px; height: 1px; margin: 0 10px 3px 0; background: var(--teal); }
h1, h2, h3, p { text-wrap: pretty; }
h1 { margin: 0; font-size: clamp(4rem, 8.2vw, 7.6rem); line-height: .86; letter-spacing: -.075em; }
h1 em { color: var(--teal); font-style: normal; font-weight: 500; }
.hero-lead { max-width: 650px; margin: 36px 0 0; color: #c5cedc; font-size: clamp(1.06rem, 1.55vw, 1.3rem); line-height: 1.65; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 0; width: fit-content; margin-top: 30px; border-block: 1px solid var(--line); }
.hero-facts span { display: grid; gap: 3px; min-width: 190px; padding: 13px 28px 13px 0; color: var(--muted); font-size: .7rem; letter-spacing: .05em; text-transform: uppercase; }
.hero-facts span + span { padding-left: 28px; border-left: 1px solid var(--line); }
.hero-facts strong { color: var(--ink); font-size: .8rem; letter-spacing: .08em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 38px; }
.button { min-height: 54px; display: inline-flex; align-items: center; justify-content: center; gap: 28px; padding: 12px 20px; border: 1px solid transparent; border-radius: 11px 4px 11px 4px; font-size: .88rem; font-weight: 850; text-decoration: none; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: linear-gradient(110deg, var(--teal), #8fffe3); color: #03201b; box-shadow: 0 14px 40px rgba(105,245,208,.11); }
.button-secondary { border-color: var(--line-strong); background: rgba(13,17,25,.7); color: var(--ink); }
.button-secondary:hover { border-color: var(--teal); }

.signal-card { position: relative; min-height: 500px; display: grid; grid-template-rows: auto 1fr auto; padding: 22px; border: 1px solid var(--line-strong); border-radius: 28px 7px 28px 7px; background: linear-gradient(150deg, rgba(21,28,40,.89), rgba(7,10,15,.95)); box-shadow: 0 40px 100px rgba(0,0,0,.45); backdrop-filter: blur(12px); }
.signal-card::after { content: ""; position: absolute; inset: 0 0 auto; height: 3px; background: linear-gradient(90deg, var(--teal), var(--violet), transparent 74%); }
.signal-card-head { display: flex; justify-content: space-between; color: var(--muted); font-size: .65rem; font-weight: 800; letter-spacing: .14em; }
.live-status { display: flex; align-items: center; gap: 7px; color: var(--teal); }
.live-status i { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 12px var(--teal); }
.signal-visual { position: relative; display: grid; place-items: center; min-height: 300px; }
.signal-visual::before, .signal-visual::after { content: ""; position: absolute; border: 1px solid var(--line); border-radius: 50%; }
.signal-visual::before { width: 214px; height: 214px; }
.signal-visual::after { width: 300px; height: 300px; border-style: dashed; animation: spin 28s linear infinite; }
.shield-core { position: relative; z-index: 2; width: 112px; height: 124px; display: grid; place-items: center; clip-path: polygon(50% 0, 93% 18%, 86% 74%, 50% 100%, 14% 74%, 7% 18%); background: linear-gradient(155deg, var(--teal), #219d86); color: #04231d; font-size: 1.8rem; font-weight: 950; box-shadow: 0 0 70px rgba(105,245,208,.24); }
.signal-line { position: absolute; height: 1px; background: linear-gradient(90deg, transparent, var(--violet), transparent); }
.line-a { width: 100%; transform: rotate(28deg); }
.line-b { width: 85%; transform: rotate(-38deg); }
.signal-node { position: absolute; width: 9px; height: 9px; border: 2px solid var(--orange); border-radius: 50%; background: var(--panel); box-shadow: 0 0 15px rgba(255,180,92,.5); }
.node-a { top: 23%; left: 20%; }.node-b { top: 34%; right: 14%; }.node-c { bottom: 22%; left: 27%; }
.signal-data { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; border-top: 1px solid var(--line); padding-top: 18px; }
.signal-data div { display: grid; gap: 4px; }
.signal-data strong { font-size: .78rem; }.signal-data span { color: var(--muted); font-size: .63rem; }

.section { position: relative; max-width: var(--content); margin: 0 auto; padding: 130px 24px; border-top: 1px solid var(--line); }
.section-index { position: absolute; top: 36px; left: 24px; color: var(--muted); font-size: .65rem; font-weight: 800; letter-spacing: .16em; }
.intro { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(40px, 9vw, 130px); }
.section-heading h2, .method h2, .closing h2 { margin: 0; font-size: clamp(2.6rem, 5vw, 5rem); line-height: 1; letter-spacing: -.055em; }
.intro-copy { align-self: end; }
.intro-copy p, .method-copy > p:last-child { margin: 0; color: #bac5d5; font-size: 1.06rem; line-height: 1.75; }
.text-link { display: inline-flex; gap: 12px; margin-top: 30px; padding-bottom: 6px; border-bottom: 1px solid rgba(105,245,208,.5); color: var(--teal); font-size: .84rem; font-weight: 800; text-decoration: none; }
.text-link:hover { border-color: var(--teal); }

.course-facts { max-width: var(--content); margin: 0 auto 130px; padding: clamp(28px, 5vw, 58px); border: 1px solid var(--line-strong); border-radius: 28px 7px 28px 7px; background: linear-gradient(145deg, rgba(21,28,40,.91), rgba(8,12,18,.98)); box-shadow: 0 35px 100px rgba(0,0,0,.34); }
.course-facts-head { position: relative; padding-right: 230px; }
.course-facts-head h2 { max-width: 780px; margin: 0; font-size: clamp(2rem, 4.2vw, 4rem); line-height: 1; letter-spacing: -.05em; }
.capacity-badge { position: absolute; top: 0; right: 0; display: inline-flex; align-items: center; gap: 9px; padding: 9px 12px; border: 1px solid rgba(255,180,92,.32); border-radius: 999px; background: rgba(255,180,92,.08); color: var(--orange); font-size: .68rem; font-weight: 850; letter-spacing: .05em; text-transform: uppercase; }
.capacity-badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 12px rgba(255,180,92,.75); }
.course-facts-grid { display: grid; grid-template-columns: repeat(2, 1fr); margin: 45px 0 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.course-facts-grid div { min-height: 120px; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.course-facts-grid .fact-address { grid-column: 1 / -1; min-height: auto; }
.course-facts-grid dt { margin-bottom: 10px; color: var(--teal); font-size: .66rem; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.course-facts-grid dd { margin: 0; color: #d9e0ea; font-size: 1rem; line-height: 1.5; }
.course-facts-footer { display: flex; align-items: center; justify-content: space-between; gap: 45px; margin-top: 30px; }
.course-facts-footer p { max-width: 670px; margin: 0; color: var(--muted); line-height: 1.65; }
.course-facts-footer .button { flex: 0 0 auto; }

.topics { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(40px, 8vw, 100px); }
.topics-heading { position: sticky; top: 130px; align-self: start; }
.topics-heading h2 { max-width: 500px; font-size: clamp(2.5rem, 4.5vw, 4.4rem); }
.topic-list { display: grid; }
.topic-card { display: grid; grid-template-columns: 45px 1fr 36px; gap: 22px; align-items: start; padding: 32px 0; border-bottom: 1px solid var(--line); }
.topic-card:first-child { border-top: 1px solid var(--line); }
.topic-number { color: var(--teal); font-size: .68rem; font-weight: 900; letter-spacing: .12em; }
.topic-card h3 { margin: -6px 0 10px; font-size: clamp(1.4rem, 2.3vw, 2.1rem); letter-spacing: -.035em; }
.topic-card p { margin: 0; color: var(--muted); line-height: 1.6; }
.topic-icon { color: var(--violet); font-size: 1.35rem; text-align: right; }

.method { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(45px, 9vw, 120px); }
.method-copy > p:last-child { margin-top: 28px; }
.method-panel { align-self: end; display: grid; padding: 34px; border: 1px solid var(--line-strong); border-radius: 24px 6px 24px 6px; background: linear-gradient(145deg, rgba(21,28,40,.86), rgba(9,13,20,.92)); }
.method-step { display: grid; grid-template-columns: 52px 1fr; align-items: baseline; gap: 5px 20px; }
.method-step span { grid-row: 1 / 3; color: var(--teal); font-size: .68rem; font-weight: 900; }
.method-step strong { font-size: 1.3rem; }.method-step small { color: var(--muted); font-size: .8rem; }
.method-divider { width: 1px; height: 58px; margin: 8px 0 8px 25px; background: linear-gradient(var(--teal), var(--line)); }

.closing { display: flex; align-items: end; justify-content: space-between; gap: 45px; }
.closing h2 { max-width: 780px; }.closing .button { flex: 0 0 auto; }
.site-footer { max-width: var(--content); min-height: 210px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 30px; margin: 0 auto; padding: 45px 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: .76rem; }
.footer-brand { color: var(--ink); }.site-footer > p { text-align: right; }
.footer-meta { grid-column: 1 / -1; display: flex; justify-content: space-between; padding-top: 20px; border-top: 1px solid var(--line); }
.footer-meta a { color: var(--teal); text-decoration: none; }

@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { :root { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }

@media (max-width: 900px) {
  .site-header { padding-inline: 20px; }
  .menu-button { display: block; }
  .main-nav { position: absolute; inset: 76px 16px auto; display: none; align-items: stretch; gap: 0; padding: 10px; border: 1px solid var(--line-strong); border-radius: 14px; background: rgba(9,13,20,.98); box-shadow: 0 25px 70px rgba(0,0,0,.55); }
  .main-nav.open { display: grid; }
  .main-nav a { padding: 15px 13px; }.main-nav .nav-cta { margin-top: 5px; text-align: center; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 150px; }
  .hero-copy { max-width: 760px; }.signal-card { max-width: 620px; width: 100%; margin: 0 auto; }
  .intro, .topics, .method { grid-template-columns: 1fr; }
  .course-facts { margin-inline: 24px; }
  .course-facts-head { padding-right: 0; }.capacity-badge { position: static; margin-top: 24px; }
  .course-facts-footer { align-items: stretch; flex-direction: column; }.course-facts-footer .button { align-self: start; }
  .topics-heading { position: static; }.topics-heading h2 { max-width: 680px; }
}

@media (max-width: 600px) {
  .brand-name { font-size: .78rem; }
  .hero { padding-inline: 20px; padding-bottom: 78px; gap: 55px; }
  h1 { font-size: clamp(3.5rem, 18vw, 5.1rem); }
  .hero-lead { font-size: 1rem; }
  .hero-facts { width: 100%; }.hero-facts span { width: 100%; padding: 12px 0; }.hero-facts span + span { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .hero-actions { display: grid; }.button { width: 100%; }
  .signal-card { min-height: 430px; padding: 18px; }
  .signal-visual { min-height: 250px; transform: scale(.88); }
  .signal-data { gap: 8px; }.signal-data span { font-size: .58rem; }
  .section { padding: 100px 20px; }.section-index { top: 28px; left: 20px; }
  .course-facts { margin: 0 20px 100px; padding: 27px 20px; }.course-facts-grid { grid-template-columns: 1fr; }.course-facts-grid .fact-address { grid-column: auto; }.course-facts-grid div { min-height: auto; padding: 20px 16px; }
  .section-heading h2, .method h2, .closing h2 { font-size: 2.65rem; }
  .topic-card { grid-template-columns: 34px 1fr; gap: 14px; }.topic-icon { display: none; }
  .method-panel { padding: 26px 20px; }.method-step { grid-template-columns: 38px 1fr; gap: 4px 12px; }.method-divider { margin-left: 18px; }
  .closing { align-items: stretch; flex-direction: column; }
  .site-footer { grid-template-columns: 1fr; }.site-footer > p { text-align: left; }.footer-meta { flex-direction: column; gap: 12px; }
}