@font-face {
  font-family: "Geist";
  src: url("assets/fonts/Geist-Variable.woff2") format("woff2");
  font-weight: 100 900; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Geist Mono";
  src: url("assets/fonts/GeistMono-Variable.woff2") format("woff2");
  font-weight: 100 900; font-style: normal; font-display: swap;
}

:root {
  --bg: #0a0a0a;
  --bg-2: #111214;
  --text: #ededed;
  --text-2: #a1a1aa;
  --text-3: #71717a;
  --accent: #22d3ee;
  --accent-2: #3b82f6;
  --accent-soft: rgba(34, 211, 238, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --glass: rgba(255, 255, 255, 0.035);
  --radius: 20px;
  --font: "Geist", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
p { margin: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.03em; line-height: 1.08; }
ul { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--accent); color: #000; }

.container { width: min(1200px, 100% - 32px); margin-inline: auto; }

/* Background */
.bg-glow {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(60vw 50vh at 85% -10%, rgba(34, 211, 238, 0.14), transparent 60%),
    radial-gradient(50vw 50vh at -10% 30%, rgba(59, 130, 246, 0.10), transparent 60%),
    radial-gradient(40vw 40vh at 60% 110%, rgba(34, 211, 238, 0.08), transparent 60%);
}
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
  opacity: 0.5;
}

/* Icons */
.ic { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.ic-accent { color: var(--accent); }

/* Typography helpers */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.muted { color: var(--text-2); }
.small { font-size: 14px; }

/* Glass */
.glass {
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
}
.card {
  padding: 28px;
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
}
.card:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 20px 60px -30px rgba(34, 211, 238, 0.45);
}
.card p { color: var(--text-2); }
.card-title { font-size: 24px; color: var(--text); }

/* Nav */
.nav {
  position: fixed; left: 50%; bottom: 20px; z-index: 50;
  transform: translateX(-50%);
  display: flex; align-items: center; gap: 2px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(14, 14, 16, 0.72);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 10px 40px -10px rgba(0,0,0,.8);
  max-width: calc(100% - 24px);
}
.nav a {
  padding: 8px 14px; border-radius: 999px;
  font-size: 14px; color: var(--text-2); white-space: nowrap;
  transition: color .2s, background .2s;
}
.nav a:hover, .nav a.active { color: var(--text); background: rgba(255,255,255,.06); }
.nav-brand { font-family: var(--mono); font-weight: 500; color: var(--accent) !important; }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent) !important;
  border: 1px solid rgba(34, 211, 238, 0.35);
  margin-left: 4px;
}
.nav-cta .ic { width: 14px; height: 14px; }
.nav-cta:hover { background: var(--accent-soft) !important; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 22px; border-radius: 999px;
  font: 500 15px var(--font);
  border: 1px solid transparent; cursor: pointer;
  transition: transform .2s, box-shadow .3s, background .3s, color .3s, border-color .3s;
}
.btn .ic { width: 16px; height: 16px; transition: transform .25s; }
.btn:hover .ic { transform: translate(2px, -2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #031016;
  box-shadow: 0 10px 40px -12px rgba(34, 211, 238, 0.7);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 50px -12px rgba(34, 211, 238, 0.9); }
.btn-ghost { color: var(--accent); border-color: rgba(34, 211, 238, 0.3); background: rgba(34, 211, 238, 0.04); }
.btn-ghost:hover { background: var(--accent-soft); }
.btn[disabled] {
  background: rgba(255,255,255,.04); color: var(--text-3);
  border-color: var(--border); box-shadow: none; cursor: not-allowed; transform: none;
}
.btn-block { width: 100%; margin-top: 8px; }

/* Hero */
.hero {
  min-height: 100vh; min-height: 100svh;
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 64px; align-items: center;
  padding-block: 96px 120px;
}
.hero-copy { display: flex; flex-direction: column; gap: 24px; }
.hero-title {
  font-size: clamp(56px, 9vw, 128px);
  font-weight: 700; letter-spacing: -0.055em; line-height: 0.92;
  background: linear-gradient(180deg, #fff 30%, #9ca3af 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { font-size: clamp(18px, 2vw, 22px); color: var(--text-2); line-height: 1.45; }
.hero-sub span { color: var(--accent); }
.hero-intro { max-width: 460px; color: var(--text-2); font-size: 17px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 4px; }
.hero-school { display: inline-flex; align-items: center; gap: 10px; color: var(--text-2); font-size: 14px; }
.hero-school .ic { color: var(--accent); }

/* System overview card */
.system {
  padding: 28px; display: flex; flex-direction: column; align-items: stretch;
  border-color: rgba(34, 211, 238, 0.22);
  box-shadow: 0 0 0 1px rgba(34,211,238,.04), 0 40px 120px -40px rgba(34, 211, 238, 0.4);
  position: relative; overflow: hidden;
}
.system::before {
  content: ""; position: absolute; inset: -1px; pointer-events: none;
  background: radial-gradient(400px 200px at 80% 0%, rgba(34,211,238,.14), transparent 70%);
}
.system-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 20px; }
.system-head .eyebrow { max-width: 200px; line-height: 1.6; }
.system-domain { display: flex; align-items: center; justify-content: center; gap: 8px; color: var(--text-2); font-family: var(--mono); font-size: 14px; }
.sys-line {
  width: 1px; height: 24px; margin: 8px auto;
  background: linear-gradient(var(--accent), transparent);
  position: relative; overflow: hidden;
}
.sys-line::after {
  content: ""; position: absolute; left: -1px; width: 3px; height: 8px; border-radius: 2px;
  background: var(--accent); box-shadow: 0 0 10px var(--accent);
  animation: packet 2.2s linear infinite;
}
.sys-line--dashed { background: repeating-linear-gradient(var(--accent) 0 4px, transparent 4px 8px); }
@keyframes packet { from { top: -8px; } to { top: 100%; } }
.sys-node {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 16px; border-radius: 14px;
  border: 1px solid var(--border); background: rgba(255,255,255,.02);
  font-size: 14px; color: var(--text);
  transition: border-color .3s, background .3s;
}
.sys-node:hover { border-color: rgba(34,211,238,.4); background: var(--accent-soft); }
.sys-node--accent { border-color: rgba(34, 211, 238, 0.3); background: rgba(34, 211, 238, 0.05); }
.sys-node--plain { flex-direction: column; gap: 6px; }
.sys-label { color: var(--text-3); font-size: 13px; }
.sys-split { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.system-foot { margin-top: 20px; color: var(--text-2); font-size: 14px; }

/* Sections */
.section { padding-block: 120px 40px; scroll-margin-top: 24px; }
.section > .eyebrow { margin-bottom: 18px; }
.section-title {
  font-size: clamp(36px, 5.5vw, 64px);
  letter-spacing: -0.045em; margin-bottom: 24px;
  background: linear-gradient(180deg, #fff 40%, #a1a1aa 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { max-width: 760px; color: var(--text-2); font-size: clamp(16px, 1.6vw, 19px); }
.subhead {
  display: flex; align-items: center; gap: 12px;
  margin: 64px 0 24px; font-size: clamp(20px, 2.4vw, 28px); font-weight: 500; letter-spacing: -0.02em; color: var(--text);
}
.subhead .ic { width: 24px; height: 24px; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px; margin-top: 40px; }
.about-copy { display: flex; flex-direction: column; gap: 20px; }
.study { gap: 14px; }
.study-school { font-size: 32px; letter-spacing: -0.035em; }
.pill {
  display: inline-flex; align-items: center; gap: 10px; align-self: flex-start;
  padding: 8px 14px; border-radius: 999px; font-size: 13px;
  border: 1px solid rgba(34,211,238,.3); background: var(--accent-soft); color: var(--text) !important;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.study-lang-title { margin-top: 12px; color: var(--text) !important; font-weight: 500; }
.langs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.langs li {
  display: flex; flex-direction: column; gap: 2px;
  padding: 14px; border-radius: 12px; border: 1px solid var(--border); background: rgba(255,255,255,.02);
  position: relative; overflow: hidden;
}
.langs strong { font-weight: 500; }
.langs span { color: var(--text-2); font-size: 13px; }
.langs i {
  position: absolute; left: 0; bottom: 0; height: 2px; width: var(--w);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

/* Certifications */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
.roadmap-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.cert-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.cert-logo {
  display: grid; place-items: center;
  width: 64px; height: 64px; padding: 12px; border-radius: 14px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  transition: border-color .3s, background .3s;
}
.cert-logo--wide { width: 88px; padding: 10px 14px; }
.cert-logo img { width: 100%; height: 100%; object-fit: contain; display: block; }
.cert:hover .cert-logo { border-color: rgba(34,211,238,.35); background: rgba(255,255,255,.06); }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--accent);
  padding: 6px 12px; border-radius: 999px; border: 1px solid rgba(34,211,238,.3); background: var(--accent-soft);
}
.badge .ic { width: 14px; height: 14px; }
.badge--next { color: var(--text-2); border-color: var(--border-strong); background: transparent; border-style: dashed; }
.cert-name { font-size: 24px; letter-spacing: -0.03em; }
.cert--next { border-style: dashed; }

/* Home-lab */
.nodes-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.nodes-grid .node { grid-column: span 2; }
.nodes-grid .node--main { grid-column: span 4; }
.node-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 8px; }
.node-head .ic { width: 22px; height: 22px; }
.node-name { font-size: 28px; letter-spacing: -0.035em; }
.node--main .node-name { font-size: 34px; }
.spec { font-family: var(--mono); font-size: 13px; color: var(--text-3) !important; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 12px; }
.tags li {
  font-family: var(--mono); font-size: 12px; color: var(--text-2);
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border); background: rgba(255,255,255,.02);
}
.sec-grid, .vision-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ops-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 20px; margin-top: 20px; }
.flow { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 8px; font-family: var(--mono); font-size: 12px; }
.flow span { padding: 8px 12px; border-radius: 10px; border: 1px solid rgba(34,211,238,.3); background: var(--accent-soft); color: var(--text); }
.flow i { flex: 1; min-width: 24px; height: 1px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); position: relative; }
.flow i.flow-vpn { background: repeating-linear-gradient(90deg, var(--accent) 0 4px, transparent 4px 8px); }
.flow i::after { content: ""; position: absolute; right: -1px; top: -3px; border: 3.5px solid transparent; border-left: 6px solid var(--accent-2); }
.note {
  display: flex; gap: 12px; align-items: flex-start;
  margin-top: 40px; padding: 18px 22px; border-radius: 14px;
  border: 1px dashed rgba(34,211,238,.3); color: var(--text-2); font-size: 15px;
}
.note .ic { margin-top: 3px; }

/* Vision */
.vision-grid { margin-top: 40px; }
.next { margin-top: auto; padding-top: 12px; font-family: var(--mono); font-size: 13px; color: var(--accent) !important; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; margin-top: 24px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-info .lead { margin-bottom: 16px; }
.contact-link {
  display: flex; align-items: center; gap: 16px; padding: 18px 20px;
  transition: border-color .3s, background .3s;
}
.contact-link:hover { border-color: rgba(34,211,238,.4); background: var(--accent-soft); }
.contact-link > span { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.contact-link .ic { width: 22px; height: 22px; }
.contact-link .arrow { width: 16px; height: 16px; color: var(--text-3); transition: transform .25s, color .25s; }
.contact-link:hover .arrow { transform: translate(2px, -2px); color: var(--accent); }
.contact-val { color: var(--text); overflow-wrap: anywhere; }
.form { gap: 16px; }
.form label { display: flex; flex-direction: column; gap: 8px; font-size: 14px; color: var(--text-2); }
.form input, .form textarea {
  width: 100%; padding: 14px 16px; border-radius: 12px;
  background: rgba(0,0,0,.35); border: 1px solid var(--border-strong);
  color: var(--text); font: 16px var(--font); resize: vertical;
  transition: border-color .2s, box-shadow .2s;
}
.form input::placeholder, .form textarea::placeholder { color: var(--text-3); }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.form-status { min-height: 1.2em; font-size: 14px; color: var(--accent) !important; }

/* Footer */
.footer {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  padding-block: 80px 110px; margin-top: 80px;
  border-top: 1px solid var(--border); color: var(--text-3); font-size: 14px;
}
.footer a { display: inline-flex; align-items: center; gap: 6px; color: var(--text-2); }
.footer a:hover { color: var(--accent); }
.footer .ic { width: 14px; height: 14px; color: var(--accent); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* Tablet */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding-top: 72px; min-height: auto; }
  .system { max-width: 560px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .nodes-grid { grid-template-columns: repeat(2, 1fr); }
  .nodes-grid .node, .nodes-grid .node--main { grid-column: span 1; }
  .nodes-grid .node--main { grid-column: span 2; }
  .sec-grid, .vision-grid { grid-template-columns: repeat(2, 1fr); }
  .ops-grid { grid-template-columns: 1fr; }
  .br-lg { display: none; }
}

/* Mobile */
@media (max-width: 640px) {
  .section { padding-block: 88px 24px; }
  .card { padding: 22px; }
  .cert-grid, .roadmap-grid, .nodes-grid, .sec-grid, .vision-grid { grid-template-columns: 1fr; }
  .nodes-grid .node--main { grid-column: span 1; }
  .node--main .node-name { font-size: 28px; }
  .hero-ctas .btn { width: 100%; }
  .langs { grid-template-columns: 1fr 1fr; }
  .nav { bottom: 12px; gap: 0; padding: 4px; }
  .nav a { padding: 8px 10px; font-size: 13px; }
  .nav-brand { display: none; }
  .footer { padding-bottom: 96px; }
}
@media (max-width: 420px) {
  .nav a { padding: 8px 7px; font-size: 12px; }
  .nav-cta .ic { display: none; }
  .sys-split { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}