:root {
  --ink: #15181f;
  --ink-soft: #5a6170;
  --paper: #eef1f5;
  --accent: #2b5cff;
  --font-display: "Syne", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  min-height: 100%;
}

body {
  font-family: var(--font-display);
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(ellipse 90% 70% at 80% 15%, rgba(43, 92, 255, 0.08), transparent 55%),
    radial-gradient(ellipse 70% 60% at 10% 85%, rgba(120, 140, 170, 0.14), transparent 50%),
    linear-gradient(160deg, #f5f7fa 0%, #e8edf4 55%, #dde5ef 100%);
}

#graph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse 65% 60% at 32% 45%,
      rgba(245, 247, 250, 0.78) 0%,
      rgba(245, 247, 250, 0.35) 45%,
      transparent 72%
    ),
    linear-gradient(
      to bottom,
      rgba(245, 247, 250, 0.5) 0%,
      transparent 16%,
      transparent 84%,
      rgba(245, 247, 250, 0.5) 100%
    );
}

.hero {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1fr;
  align-content: center;
  padding: clamp(2rem, 5vw, 4rem);
  max-width: 1180px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: flex-end;
  gap: 0.15rem;
  opacity: 0;
  animation: fade-in 0.8s ease 0.1s forwards;
}

.brand-mark {
  width: clamp(8.5rem, 24vw, 14rem);
  height: auto;
  overflow: visible;
}

.mark-stroke {
  stroke: var(--ink);
  stroke-width: 10;
  fill: none;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

.mark-d {
  animation: draw-mark 1.15s cubic-bezier(0.4, 0, 0.2, 1) 0.15s forwards;
}

.mark-a {
  animation: draw-mark 1.15s cubic-bezier(0.4, 0, 0.2, 1) 0.45s forwards;
}

.brand-io {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.5vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.35rem;
  color: var(--ink);
  opacity: 0;
  animation: fade-in 0.7s ease 1.1s forwards;
}

.headline {
  margin-top: 1.5rem;
  font-size: clamp(1.4rem, 3.2vw, 2.05rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--ink);
  opacity: 0;
  animation: fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.55s forwards;
}

.support {
  margin-top: 1rem;
  max-width: 26rem;
  font-size: clamp(1rem, 2vw, 1.125rem);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink-soft);
  opacity: 0;
  animation: fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.7s forwards;
}

.cta {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 1.75rem;
  opacity: 0;
  animation: fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.85s forwards;
}

.cta-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: #f4f6fa;
  background: var(--ink);
  text-decoration: none;
  padding: 0.85rem 1.35rem;
  border-radius: 2px;
  transition: background 0.25s ease, transform 0.25s ease;
}

.cta-link:hover {
  background: #262b36;
  transform: translateY(-1px);
}

.cta-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

@keyframes draw-mark {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes fade-in {
  to {
    opacity: 1;
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .mark-stroke,
  .mark-d,
  .mark-a,
  .brand,
  .brand-io,
  .headline,
  .support,
  .cta {
    animation: none;
  }

  .mark-stroke {
    stroke-dashoffset: 0;
  }

  .brand,
  .brand-io,
  .headline,
  .support,
  .cta {
    opacity: 1;
    transform: none;
  }
}