@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');

:root {
  /* Retro Terminal Colors */
  --background-color: #000000;
  --text-color: #33ff00; /* Classic Green Phosphor */
  --heading-color: #33ff00;
  --dim-color: #1a8000;
  
  --primary-color: #33ff00;
  --secondary-color: #33ff00;
  --muted-color: #1a8000;
  
  --heading-font: "VT323", monospace;
  --body-font: "VT323", monospace;
  
  --base-font-size: 32px;
  --text-size: 22pt; /* Larger for pixel font readability */
  --h1-size: 60pt;
  --h2-size: 48pt;
  --h3-size: 36pt;
  
  --box-bg: #001100;
  --box-border: #33ff00;
  
  --text-shadow: 0 0 5px rgba(51, 255, 0, 0.7), 0 0 10px rgba(51, 255, 0, 0.5);
}

body, .reveal-viewport {
  background-color: var(--background-color);
  overflow: hidden; /* Prevent scrollbars from scanlines */
}

/* CRT Screen Effect Overlay */
body::before {
  content: " ";
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
  z-index: 1000;
  background-size: 100% 2px, 3px 100%;
  pointer-events: none;
}

/* Screen Flicker Animation */
@keyframes flicker {
  0% { opacity: 0.97; }
  5% { opacity: 0.95; }
  10% { opacity: 0.9; }
  15% { opacity: 0.95; }
  20% { opacity: 0.99; }
  25% { opacity: 0.95; }
  30% { opacity: 0.9; }
  35% { opacity: 0.96; }
  40% { opacity: 0.98; }
  45% { opacity: 0.95; }
  50% { opacity: 0.99; }
  55% { opacity: 0.93; }
  60% { opacity: 0.9; }
  65% { opacity: 0.96; }
  70% { opacity: 1; }
  75% { opacity: 0.97; }
  80% { opacity: 0.95; }
  85% { opacity: 0.92; }
  90% { opacity: 0.96; }
  95% { opacity: 0.99; }
  100% { opacity: 0.94; }
}

.reveal {
  font-family: var(--body-font);
  color: var(--text-color);
  text-shadow: var(--text-shadow);
  animation: flicker 0.15s infinite;
}

.reveal h1, .reveal h2, .reveal h3, .reveal h4 {
  font-family: var(--heading-font);
  color: var(--heading-color);
  text-transform: uppercase;
  text-shadow: 0 0 10px rgba(51, 255, 0, 0.9), 0 0 20px rgba(51, 255, 0, 0.7);
  letter-spacing: 2px;
}

.reveal p, .reveal li {
  font-size: var(--text-size);
  color: var(--text-color);
}

.reveal section {
  border: 1px solid var(--dim-color);
  background: rgba(0, 20, 0, 0.6);
  box-shadow: 0 0 20px rgba(51, 255, 0, 0.1) inset;
}

/* Blinking Cursor for Headers */
.reveal h1::after, .reveal h2::after {
  content: "_";
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Components */
.box {
  background: var(--box-bg);
  border: 2px solid var(--box-border);
  border-radius: 0;
  padding: 20px;
  box-shadow: 0 0 10px var(--box-border);
}

.callout {
  border-left: 10px solid var(--primary-color);
  background: #001a00;
  padding: 15px 20px;
  border-radius: 0;
  margin: 15px 0;
}

code {
  font-family: "VT323", monospace !important;
  background: #002200;
  color: #aaffaa;
  padding: 2px 6px;
}

pre code {
  background: #001100;
  border: 1px dashed var(--box-border);
  color: #aaffaa;
}

/* Glitch effect on hover for links */
a:hover {
  text-shadow: 2px 0 #ff0000, -2px 0 #0000ff;
}

/* Mermaid diagrams */
.mermaid { width: 100%; }
.mermaid svg { max-width: 100%; height: auto; }