:root {
  --bg: #0A0A0A;
  --bg-alt: #101012;
  --card: #141417;
  --line: #23232A;
  --ink: #FFFFFF;
  --muted: #8B8B93;
  --accent: #00BEFF;
  --accent-hover: #009ACC;
  --lavender: #C9B8FF;
  --measure: 64rem;
  --measure-narrow: 40rem;
  --header-h: 4.25rem;
  --radius: 1rem;
  --font-display: "Barlow Condensed", "Arial Narrow", "Helvetica Neue", sans-serif;
  --font-body: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--bg);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  background: var(--bg);
  color: var(--ink);
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 0.95;
  margin: 0;
}

p { margin: 0; }

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 200;
  background: var(--accent);
  color: var(--bg);
  padding: 0.6rem 1rem;
  border-radius: 999px;
  font-weight: 600;
}
.skip:focus { top: 0.75rem; }

.wrap {
  width: min(100% - 2rem, var(--measure));
  margin-inline: auto;
}
.wrap-narrow {
  width: min(100% - 2rem, var(--measure-narrow));
  margin-inline: auto;
}

.eyebrow {
  display: block;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.cyan { color: var(--accent); }
.muted { color: var(--muted); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: 100%;
  width: min(100% - 1.25rem, var(--measure));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  min-width: 0;
  flex: 1 1 auto;
}
.brand:hover { color: var(--ink); }
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}
.wordmark {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  min-width: 0;
  line-height: 1;
}
.wordmark .name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.01em;
}
.wordmark .by {
  color: var(--lavender);
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
}
.header-nav {
  display: none;
  align-items: center;
  gap: 1.25rem;
}
.header-nav a {
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.5rem 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.header-nav a:hover { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: rgba(255, 255, 255, 0.28);
}
.btn-ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.btn-header {
  padding-inline: 1.1rem;
  flex-shrink: 0;
}
.btn-lg {
  min-height: 48px;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
}

/* Hero */
.hero {
  position: relative;
  padding: 4.5rem 0 5rem;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  width: 28rem;
  height: 28rem;
  right: -8rem;
  top: -6rem;
  background: radial-gradient(circle, rgba(0, 190, 255, 0.16), transparent 68%);
  pointer-events: none;
}
.hero-grid {
  width: min(100% - 2rem, var(--measure));
  margin-inline: auto;
  display: grid;
  gap: 2.5rem;
  align-items: center;
  position: relative;
}
.hero h1 {
  font-size: clamp(2.75rem, 11vw, 5.75rem);
  max-width: 14ch;
  margin-bottom: 1.25rem;
}
.hero .lede {
  color: var(--muted);
  font-size: 1.0625rem;
  max-width: 36rem;
  margin-bottom: 1.75rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}
.hero-mark {
  display: flex;
  justify-content: center;
}
.hero-mark img {
  width: min(100%, 18rem);
  border-radius: 1.5rem;
  box-shadow: 0 0 80px rgba(0, 190, 255, 0.12);
}

/* Sections */
.section {
  padding: 5rem 0;
}
.section-alt { background: var(--bg-alt); }
.section h2 {
  font-size: clamp(2.25rem, 7vw, 4rem);
  margin-bottom: 1.25rem;
}
.intro {
  color: var(--muted);
  max-width: 38rem;
  margin-bottom: 2rem;
}

.split {
  display: grid;
  gap: 2rem;
}
.split-copy p { max-width: 36rem; }
.bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.bullets li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
  color: var(--ink);
}

/* Cards */
.grid-2, .grid-4 {
  display: grid;
  gap: 1.25rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  padding: 1.5rem 1.35rem;
  position: relative;
}
.card h3 {
  font-size: 1.85rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
}
.card p { color: var(--muted); }
.card-tile {
  width: 48px;
  height: 48px;
  border-radius: 0.7rem;
  margin-bottom: 1.1rem;
}
.num {
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.steps {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2rem;
}
.step {
  border-top: 1px solid var(--line);
  padding-top: 1.15rem;
}
.step .num { margin-bottom: 0.25rem; }
.step h3 {
  font-size: 1.65rem;
  margin-bottom: 0.45rem;
}
.step p { color: var(--muted); }
.center { text-align: center; }

.compare {
  display: grid;
  gap: 1.25rem;
}
.compare .card h3 { margin-bottom: 0.75rem; }
.compare .tag {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.55rem;
}
.card-preferred {
  border-color: rgba(0, 190, 255, 0.55);
  box-shadow: 0 0 0 1px rgba(0, 190, 255, 0.15), 0 0 40px rgba(0, 190, 255, 0.06);
}
.card-preferred .tag { color: var(--accent); }

/* FAQ */
.faq {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 44px;
  padding: 1.15rem 0;
  font-weight: 600;
  color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq .answer {
  color: var(--muted);
  padding: 0 2.5rem 1.25rem 0;
  max-width: 40rem;
}

/* Close CTA */
.cta {
  padding: 6rem 0 6.5rem;
  text-align: center;
}
.cta h2 {
  font-size: clamp(2.25rem, 7vw, 4.25rem);
  margin-bottom: 1.75rem;
}
.cta .note {
  color: var(--muted);
  margin-top: 1.1rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 3rem 0 2.5rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  margin-bottom: 1.25rem;
  width: fit-content;
}
.footer-brand:hover { color: var(--ink); }
.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}
.footer-brand .name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
}
.footer-brand .by {
  color: var(--lavender);
  font-size: 0.8rem;
  font-weight: 500;
  margin-left: 0.35rem;
}
.footer-blurb {
  color: var(--muted);
  max-width: 32rem;
  margin-bottom: 1.5rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.15rem;
  margin-bottom: 1.5rem;
}
.footer-links a {
  color: var(--ink);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: 0.9375rem;
}
.footer-links a:hover { color: var(--accent); }
.footer-links .quiet { color: var(--muted); }
.legal {
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.55;
  display: grid;
  gap: 0.4rem;
}

@media (min-width: 640px) {
  .hero { padding: 5.5rem 0 6rem; }
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
  .grid-2, .compare { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr 1fr; align-items: start; }
}

@media (min-width: 900px) {
  .header-nav { display: flex; }
  .section { padding: 6.5rem 0; }
  .grid-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr 1fr 1fr; gap: 1.5rem; }
  .step { border-top: 0; border-left: 1px solid var(--line); padding: 0 0 0 1.25rem; }
  .step:first-child { border-left: 0; padding-left: 0; }
  .hero-mark img { width: 20rem; }
}

@media (max-width: 399px) {
  .wordmark .by { font-size: 0.72rem; }
  .btn-header { padding-inline: 0.95rem; }
}

#main, #what, #who, #advantages, #how, #difference, #faq {
  scroll-margin-top: calc(var(--header-h) + 0.75rem);
}
h1, h2, h3 { overflow-wrap: break-word; }
.card h3, .step h3 { overflow-wrap: break-word; }