@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Inter:wght@400;500;600;700;800&family=Source+Serif+4:opsz,wght@8..60,400;8..60,600&display=swap');

:root {
  color-scheme: light;
  --background: oklch(0.98 0 0);
  --foreground: oklch(0.21 0.03 263.61);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.21 0.03 263.61);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.21 0.03 263.61);
  --primary: oklch(0.48 0.2 260.47);
  --primary-foreground: oklch(1 0 0);
  --secondary: oklch(91.279% 0.0001 271.152);
  --secondary-foreground: oklch(0.37 0.03 259.73);
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.55 0.02 264.41);
  --accent: oklch(0.95 0.02 260.18);
  --accent-foreground: oklch(0.48 0.2 260.47);
  --destructive: oklch(0.58 0.22 27.29);
  --border: oklch(0.93 0.01 261.82);
  --input: oklch(0.93 0.01 261.82);
  --ring: oklch(0.48 0.2 260.47);

  --font-sans: Inter, sans-serif;
  --font-serif: 'Source Serif 4', serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 0.375rem;
  --shadow-xs: 0 1px 3px 0 oklch(0 0 0 / 0.05);
  --shadow-sm:
    0 1px 3px 0 oklch(0 0 0 / 0.1),
    0 1px 2px -1px oklch(0 0 0 / 0.1);
}

.dark {
  color-scheme: dark;
  --background: oklch(0.26 0.03 262.67);
  --foreground: oklch(0.93 0.01 261.82);
  --card: oklch(0.3 0.03 260.51);
  --card-foreground: oklch(0.93 0.01 261.82);
  --popover: oklch(0.3 0.03 260.51);
  --popover-foreground: oklch(0.93 0.01 261.82);
  --primary: oklch(0.56 0.24 260.92);
  --primary-foreground: oklch(1 0 0);
  --secondary: oklch(0.35 0.04 261.4);
  --secondary-foreground: oklch(0.93 0.01 261.82);
  --muted: oklch(0.3 0.03 260.51);
  --muted-foreground: oklch(0.71 0.02 261.33);
  --accent: oklch(0.33 0.04 264.63);
  --accent-foreground: oklch(0.93 0.01 261.82);
  --destructive: oklch(0.64 0.21 25.39);
  --border: oklch(0.35 0.04 261.4);
  --input: oklch(0.35 0.04 261.4);
  --ring: oklch(0.56 0.24 260.92);
}

* {
  border-color: var(--border);
}

html,
body {
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
}

::selection {
  background: color-mix(in oklab, var(--primary) 22%, transparent);
  color: var(--foreground);
}

h1,
h2,
h3,
h4 {
  letter-spacing: -0.02em;
}

p,
li {
  line-height: 1.65;
}

pre,
code,
kbd {
  font-family: var(--font-mono);
}

header.sticky {
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--background) 92%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--border) 85%, transparent);
}

header nav a {
  border-radius: 0.5rem;
  position: relative;
  text-decoration: none;
}

header nav a[aria-current='page'] {
  color: var(--primary);
  font-weight: 600;
  background: transparent;
}

header nav a[aria-current='page']::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}

/* Hide the underline pseudo-element on Home link by default */
header nav a[href='/']::after {
  display: none !important;
  background: transparent !important;
  height: 0 !important;
}

main {
  font-size: 0.99rem;
}

main a:not([class*='inline-flex']) {
  text-underline-offset: 2px;
  text-decoration-color: color-mix(in oklab, var(--primary) 35%, transparent);
}

main a:not([class*='inline-flex']):hover {
  text-decoration-color: var(--primary);
}

main table {
  overflow: hidden;
  border: 1px solid color-mix(in oklab, var(--border) 92%, transparent);
  border-radius: calc(var(--radius) + 2px);
  box-shadow: var(--shadow-xs);
}

main th {
  background: color-mix(in oklab, var(--accent) 42%, white 58%);
  font-weight: 700;
}

main td,
main th {
  border-color: color-mix(in oklab, var(--border) 90%, transparent);
}

main pre,
main .code-block-wrapper {
  border-radius: 0.8rem;
}

main pre {
  border: 1px solid color-mix(in oklab, var(--border) 88%, transparent);
}

nav[class*='max-w'][class*='flex-col'] {
  border-right: 1px solid color-mix(in oklab, var(--border) 84%, transparent);
}

/* Only style actual page navigation, not hash/anchor links */
nav[class*='max-w'][class*='flex-col'] a[aria-current='page']:not([href*='#']) {
  background: color-mix(in oklab, var(--primary) 10%, var(--background) 90%);
  border: 1px solid color-mix(in oklab, var(--primary) 18%, var(--border) 82%);
}

aside.sticky {
  border-left: 1px solid color-mix(in oklab, var(--border) 84%, transparent);
  padding-left: 1rem;
}

aside.sticky a[aria-current='true'] {
  color: var(--primary);
  font-weight: 600;
}

img[alt='ARP Digital'] {
  filter: drop-shadow(0 1px 4px oklch(0 0 0 / 0.08));
}