/* CAT — Base styles
 * Reset + typography primitives on dark surface.
 */

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

html,
body {
  margin: 0;
  padding: 0;
}

html {
  color-scheme: dark;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  background: radial-gradient(
      ellipse at 50% -10%,
      rgba(255, 140, 66, 0.06),
      transparent 55%
    ),
    radial-gradient(
      ellipse at 90% 100%,
      rgba(0, 217, 255, 0.04),
      transparent 60%
    ),
    var(--surface-1);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--lh-tight);
}

h1 {
  font-size: var(--fs-3xl);
}
h2 {
  font-size: var(--fs-2xl);
}
h3 {
  font-size: var(--fs-xl);
}
h4 {
  font-size: var(--fs-lg);
}

p {
  margin: 0;
  line-height: var(--lh-loose);
}

code,
pre,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

a:hover {
  color: var(--accent-orange);
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* Focus ring — calm, never harsh */
:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Utility: caps label used throughout the system */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-muted);
}

.mono {
  font-family: var(--font-mono);
}

.muted {
  color: var(--text-muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}