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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bone);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Brand-element: subtle dot grid, faded at top + bottom. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(27,39,53,0.12) 1px, transparent 0);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 0;
  mask-image: linear-gradient(180deg, transparent 0, black 200px, black calc(100% - 200px), transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0, black 200px, black calc(100% - 200px), transparent 100%);
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

section { padding: 96px 0; position: relative; z-index: 1; }
section + section { border-top: 1px solid var(--line-soft); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--foundation);
  letter-spacing: -0.02em;
  line-height: 1.08;
  font-weight: 700;
}
h1 { font-size: clamp(44px, 6vw, 76px); letter-spacing: -0.035em; font-weight: 800; }
h2 { font-size: clamp(32px, 4vw, 48px); }
h3 { font-size: 22px; letter-spacing: -0.015em; }
h4 { font-size: 16px; letter-spacing: -0.01em; }
p  { color: var(--ink-soft); }

a { color: var(--trust-blue-hover); }

.lead {
  font-size: 19px;
  line-height: 1.55;
  color: var(--foundation);
  opacity: 0.85;
  max-width: 56ch;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--trust-blue);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--trust-blue);
  box-shadow: 0 0 0 4px rgba(38,103,255,0.15);
}

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head .eyebrow { margin-bottom: 16px; }
.section-head p { margin-top: 18px; font-size: 17px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .15s, background .2s, border-color .2s, color .2s;
  cursor: pointer;
}
.btn-primary { background: var(--trust-blue); color: white; border-color: var(--trust-blue); }
.btn-primary:hover { background: var(--trust-blue-hover); border-color: var(--trust-blue-hover); }
.btn-secondary { background: transparent; color: var(--foundation); border-color: var(--line); }
.btn-secondary:hover { border-color: var(--foundation); }
.btn-arrow { width: 14px; height: 14px; transition: transform .2s; }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* Inline code chip used in pillars and prose */
.code-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--trust-blue-soft);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--trust-blue);
}

/* Reveal-on-scroll */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* Accessibility — visible focus ring */
:focus-visible {
  outline: 2px solid var(--trust-blue);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .term-line { opacity: 1 !important; transform: none !important; }
  .cursor { animation: none !important; }
  .packet { display: none !important; }
}