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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-deep);
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(255, 94, 20, 0.07), transparent 60%),
    radial-gradient(1000px 500px at -10% 30%, rgba(0, 212, 255, 0.05), transparent 60%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: 0;
  background: transparent;
  color: inherit;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.25rem, 5vw + 1rem, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.75rem, 2.5vw + 1rem, 2.75rem);
}

h3 {
  font-size: clamp(1.25rem, 1vw + 1rem, 1.5rem);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--text-muted);
}

p.lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-primary);
  max-width: 60ch;
}

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

:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container-narrow {
  max-width: var(--container-narrow);
}

section {
  padding: var(--space-9) 0;
}

@media (max-width: 720px) {
  section {
    padding: var(--space-8) 0;
  }
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--glow);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  display: inline-block;
}

.section-label::before {
  content: "// ";
  color: var(--text-faint);
}

.text-accent { color: var(--accent); }
.text-glow { color: var(--glow); }
.text-muted { color: var(--text-muted); }
.mono { font-family: var(--font-mono); }

.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-strong), transparent);
  margin: var(--space-8) 0;
}