:root {
  --bg: #121214;
  --bg-deep: #0c0c0e;
  --surface: rgba(255, 255, 255, 0.04);
  --text: #f5f5f7;
  --text-soft: #b4b4bd;
  --muted: #8e8e98;
  --accent: #5eead4;
  --accent-dim: #2dd4bf;
  --line: rgba(255, 255, 255, 0.08);
  --font: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --pad-x: clamp(1.35rem, 5vw, 2.75rem);
  --section-y: clamp(4.5rem, 12vw, 9rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.65;
  font-weight: 450;
  color: var(--text);
  background: var(--bg-deep);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.backdrop__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.5;
}

.backdrop__glow--top {
  width: min(90vw, 720px);
  height: min(90vw, 720px);
  top: -35%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(
    circle,
    rgba(94, 234, 212, 0.12) 0%,
    rgba(94, 234, 212, 0.03) 45%,
    transparent 65%
  );
}

.backdrop__glow--bottom {
  width: min(80vw, 560px);
  height: min(80vw, 560px);
  bottom: -30%;
  right: -20%;
  background: radial-gradient(circle, rgba(100, 100, 120, 0.14) 0%, transparent 65%);
  filter: blur(110px);
}

.backdrop__noise {
  position: absolute;
  inset: -20%;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* —— Hero: logo centre, full focus —— */
.hero {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  min-height: 100dvh;
  min-height: 100svh;
  display: grid;
  grid-template-rows: 1fr auto;
  row-gap: clamp(1.25rem, 4vw, 2rem);
  align-items: stretch;
  justify-items: center;
  padding: clamp(2.5rem, 6vw, 4rem) var(--pad-x) clamp(1rem, 3vh, 1.5rem);
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

.hero__inner {
  width: 100%;
  max-width: 52rem;
  margin: 0 auto;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-self: center;
}

.hero__logo-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto clamp(2.75rem, 5.5vw, 4rem);
}

.hero__logo-ring {
  position: absolute;
  width: calc(100% + clamp(2.5rem, 8vw, 4.5rem));
  height: calc(100% + clamp(2.5rem, 8vw, 4.5rem));
  max-width: min(96vw, 520px);
  max-height: min(96vw, 520px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(94, 234, 212, 0.14) 0%,
    rgba(94, 234, 212, 0.04) 38%,
    transparent 68%
  );
  pointer-events: none;
}

.hero__logo {
  position: relative;
  z-index: 1;
  width: min(420px, 88vw);
  height: auto;
  display: block;
  filter: drop-shadow(0 28px 64px rgba(0, 0, 0, 0.45));
}

.hero__eyebrow {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 650;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-dim);
}

.hero__title {
  margin: 0 0 1.35rem;
  font-size: clamp(2rem, 5.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.038em;
}

.hero__lead {
  margin: 0 auto;
  max-width: 40rem;
  font-size: clamp(1.0625rem, 2.4vw, 1.3125rem);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text-soft);
}

.hero__scroll {
  position: relative;
  z-index: 1;
  grid-row: 2;
  justify-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0;
  padding-bottom: clamp(1.25rem, 4vh, 2.5rem);
  text-decoration: none;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: color 0.3s var(--ease);
}

.hero__scroll:hover {
  color: var(--accent);
}

.hero__scroll-line {
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(180deg, var(--accent-dim), transparent);
  opacity: 0.6;
  animation: scroll-line 2.2s var(--ease) infinite;
}

@keyframes scroll-line {
  0%,
  100% {
    transform: scaleY(1);
    opacity: 0.5;
  }
  50% {
    transform: scaleY(0.55);
    opacity: 0.9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__scroll-line {
    animation: none;
  }
}

/* —— Scroll content —— */
.content {
  position: relative;
  z-index: 1;
}

.band {
  padding: var(--section-y) var(--pad-x);
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
}

.band:nth-child(even) {
  background: #101012;
}

.band__inner {
  max-width: 38rem;
  margin: 0 auto;
}

.band__inner--wide {
  max-width: 56rem;
}

.band__title {
  margin: 0 0 1.5rem;
  font-size: clamp(1.65rem, 3.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.band__intro {
  margin: 0 0 2.75rem;
  font-size: 1.125rem;
  color: var(--text-soft);
  line-height: 1.65;
  max-width: 40rem;
}

.band__prose {
  margin: 0 0 1.25rem;
  color: var(--text-soft);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.band__prose:last-of-type {
  margin-bottom: 0;
}

.band__prose--large {
  font-size: clamp(1.2rem, 2.5vw, 1.45rem);
  line-height: 1.55;
  color: var(--text);
  font-weight: 450;
  margin-bottom: 1.5rem;
}

.band__prose em,
.feature__body em {
  font-style: italic;
  color: var(--text);
}

.band__note {
  margin: 1.75rem 0 0;
  padding: 1rem 1.15rem;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--muted);
  background: var(--surface);
  border-radius: 0.75rem;
  border: 1px solid var(--line);
}

.band__link {
  display: inline-flex;
  margin-top: 1.75rem;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.35rem;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--bg-deep);
  background: linear-gradient(135deg, #99f6e4 0%, var(--accent) 50%, var(--accent-dim) 100%);
  border-radius: 999px;
  text-decoration: none;
  box-shadow: 0 12px 32px -12px rgba(45, 212, 191, 0.45);
  transition:
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.band__link:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px -12px rgba(45, 212, 191, 0.55);
}

/* Features grid */
.features {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

.feature {
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: 1.15rem;
  background: var(--surface);
  border: 1px solid var(--line);
  transition:
    border-color 0.3s var(--ease),
    background 0.3s var(--ease);
}

.feature:hover {
  border-color: rgba(94, 234, 212, 0.22);
  background: rgba(255, 255, 255, 0.055);
}

.feature__index {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent-dim);
  opacity: 0.85;
}

.feature__title {
  margin: 0 0 0.65rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.feature__body {
  margin: 0;
  font-size: 1rem;
  line-height: 1.62;
  color: var(--text-soft);
}

.footer {
  position: relative;
  z-index: 1;
  padding: 2.5rem var(--pad-x) 3rem;
  text-align: center;
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
}

.footer__line {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.footer__dot {
  margin: 0 0.5rem;
  opacity: 0.45;
}

@media (prefers-reduced-motion: reduce) {
  .band__link:hover {
    transform: none;
  }
}