:root {
  color-scheme: dark;
  --bg: #050507;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.11);
  --text: #f7f7f8;
  --muted: #b7b7c2;
  --line: rgba(255, 255, 255, 0.14);
  --accent: #ffffff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(255, 255, 255, 0.08), transparent 34rem), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  background: rgba(5, 5, 7, 0.78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.65rem;
  height: 2.65rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--panel);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.55rem 0.75rem;
  border-radius: 999px;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: var(--panel);
}

.section-shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 7.5rem) 0;
}

.hero {
  min-height: 78vh;
  display: grid;
  align-content: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 980px;
  margin: 0;
  font-size: clamp(3.2rem, 10vw, 8.5rem);
  line-height: 0.92;
  letter-spacing: -0.075em;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.25rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

h3 {
  margin: 0.35rem 0 0.4rem;
  font-size: 1.15rem;
}

.hero-copy {
  max-width: 710px;
  margin: 1.6rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--line);
}

.button.primary {
  color: #050507;
  background: var(--accent);
}

.button.secondary {
  background: var(--panel);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
}

.split > p {
  margin: 0;
  color: var(--muted);
  font-size: 1.25rem;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card,
.timeline-item {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.card p,
.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.symbol {
  display: inline-flex;
  margin-bottom: 0.6rem;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 1.3rem;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item span {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.principles-list {
  display: grid;
  gap: 0.8rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.principles-list li {
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
  color: var(--muted);
}

.site-footer {
  padding: 2rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
}

.vibubble {
  position: fixed;
  z-index: 50;
  max-width: min(320px, calc(100vw - 2rem));
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(18, 18, 23, 0.96);
  box-shadow: var(--shadow);
  color: var(--text);
  transform: translateY(0.35rem);
}

.vibubble[hidden] {
  display: none;
}

.vibubble-text {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
}

.vibubble-signature {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  text-align: right;
}

@media (max-width: 800px) {
  .site-header,
  .split {
    display: block;
  }

  .site-nav {
    justify-content: flex-start;
    margin-top: 1rem;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}