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

@font-face {
  font-family: "IBM VGA";
  src: url("/fonts/WebPlus_IBM_VGA_8x16.woff") format("woff");
  font-weight: normal;
  font-style: normal;
}

:root {
  --font-vga: "IBM VGA", monospace;
  --bg-dark: #0a0a0f;
  --bg-mid: #12121a;
  --text: #c0c0c8;
  --text-bright: #ffffff;
  --accent: #00d4ff;
  --accent-glow: rgba(0, 212, 255, 0.4);
  --fade: 300ms;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-vga);
  font-size: 16px;
  line-height: 1.5;
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.04) 2px, transparent 2px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.04) 2px, transparent 2px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: -1;
}

body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: repeating-linear-gradient(
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.15) 2px,
    rgba(0, 0, 0, 0.15) 4px
  );
  pointer-events: none;
  z-index: 1000;
}

nav {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav a {
  color: var(--text);
  text-decoration: none;
  margin-right: 2rem;
  text-transform: uppercase;
  font-size: 16px;
  letter-spacing: 0.05em;
  transition:
    color var(--fade),
    text-shadow var(--fade);
}

nav a:hover,
nav a.active {
  color: var(--accent);
  text-shadow:
    0 0 10px var(--accent-glow),
    0 0 20px var(--accent-glow);
}

#content {
  max-width: 48rem;
  margin: 0 auto;
  padding: 3rem 2rem;
  opacity: 1;
  transition: opacity var(--fade) ease;
}

#content.fade {
  opacity: 0;
}

#content h1 {
  font-size: 32px;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 0.5rem;
}

#content h2 {
  font-size: 24px;
}

#content h3 {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

#content a {
  color: var(--accent);
  text-decoration: none;
  transition: text-shadow var(--fade);
}

#content a:hover {
  text-shadow: 0 0 8px var(--accent-glow);
}

#content code {
  background: var(--bg-mid);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 16px;
  font-family: var(--font-vga);
}

#content pre {
  background: var(--bg-mid);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  border-left: 2px solid var(--accent);
}

#content pre code {
  background: none;
  padding: 0;
  font-size: 16px;
}