/* ==========================================================================
   tui-pages website - animated ASCII art layer (chafa-rendered)
   Loaded AFTER site.css. Provides:
     - .tp-ascii-rain   full-bleed body background, slow drifting pattern
                        sourced from static/img/og-image-bg.svg
   All animations respect prefers-reduced-motion.
   ========================================================================== */

/* Body-wide ASCII art background ---------------------------------------- */
/* Fixed full-bleed layer behind all content. Renders a chafa output of the
   og-image-bg.svg (black background + "tui-pages" wordmark + headline +
   subtitle), drawn as ASCII glyphs in a single full-width tile. Two copies
   of the tile are stacked vertically and the whole track drifts slowly
   upward, looping seamlessly when the top copy exits the viewport.

   The hero is a static <img src="static/img/terminal-default.svg"> as
   designed - this file does NOT touch the hero.

   Regenerate the source tile with `make ascii` (uses chafa on
   static/img/og-image-bg.svg). The chafa output is in static/ascii/rain.txt
   and is 240 columns wide. */

.tp-ascii-rain {
  position: fixed;
  inset: 0;
  z-index: 0;                  /* sit above the page background, below the content */
  pointer-events: none;
  opacity: 0.14;
  overflow: hidden;
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(6px, 0.9vw, 9px);
  line-height: 1.05;
  color: #f4a26b;            /* warm rust-orange tint, picks up the brand */
  white-space: pre;
  text-shadow: 0 0 6px rgba(183, 65, 14, 0.25);   /* faint phosphor glow */
  will-change: transform;
}

/* The track holds two byte-identical copies of rain.txt stacked vertically.
   translateY(0 -> -50%) is a perfect seamless loop. */
.tp-ascii-rain-track {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  animation: tp-ascii-drift 90s linear infinite;
  will-change: transform;
}

.tp-ascii-rain-cell {
  display: block;
  white-space: pre;          /* preserve the chafa line breaks */
}

/* CRT scanlines overlay - a thin moving line every 2px. Faint so it doesn't
   fight the page content. */
.tp-ascii-rain::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 2px,
    rgba(0, 0, 0, 0.18) 2px,
    rgba(0, 0, 0, 0.18) 3px
  );
  pointer-events: none;
  animation: tp-ascii-scanline 8s linear infinite;
}

@keyframes tp-ascii-drift {
  0%   { transform: translateY(0); }
  100% { transform: translateY(-50%); }
}

@keyframes tp-ascii-scanline {
  0%   { background-position: 0 0; }
  100% { background-position: 0 6px; }
}

/* The hero text is high-contrast on its own (zinc-50 / accent), and the
   body ASCII rain is at 14% opacity. No overlay needed — the rain shows
   through everywhere. */

/* Light theme: invert to dark text on light, dimmer, no glow. */
:root[data-theme="light"] .tp-ascii-rain {
  opacity: 0.10;
  color: #1f1f23;
  text-shadow: none;
  mix-blend-mode: multiply;
}

:root[data-theme="light"] .tp-ascii-rain::after {
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 2px,
    rgba(255, 255, 255, 0.12) 2px,
    rgba(255, 255, 255, 0.12) 3px
  );
}

/* Reduced motion: pause the drift, keep the static background. */
@media (prefers-reduced-motion: reduce) {
  .tp-ascii-rain-track,
  .tp-ascii-rain::after {
    animation: none !important;
    transform: none !important;
  }
}