/* Interactive effects panel + live visual effects for the ASCII terminal demo.
   All runtime values are CSS custom properties on :root, driven by
   assets/js/effects.js. Defaults below match "no effect". */

:root {
  --fx-hue: 0deg;
  --fx-brightness: 1;
  --fx-contrast: 1;
  --fx-saturate: 1;
  --fx-grayscale: 0;
  --fx-invert: 0;
  --fx-glow-color: #3551f3;
  --fx-glow-blur: 0px;
  --fx-glow-spread: 0px;
  --fx-scanline-opacity: 0.25;
  --fx-flicker-amp: 0.08;
  --fx-letter-spacing: 0px;
  --fx-scale: 1;
  --fx-vignette-opacity: 0.55;
  --fx-line-height: 1.3;
  --fx-font: "JetBrains Mono", monospace;
  --fx-fg-color: #c3c3c4;
  --fx-accent-color: #3551f3;
  --fx-ca: 0px;
  --fx-afterglow: 0px;
  --fx-curve: 0deg;
  --fx-noise: 0;
}

/* --- effect targets ------------------------------------------------------ */

.terminal-wrapper {
  filter: hue-rotate(var(--fx-hue)) brightness(var(--fx-brightness))
    contrast(var(--fx-contrast)) saturate(var(--fx-saturate))
    invert(var(--fx-invert)) grayscale(var(--fx-grayscale));
  transform: scale(var(--fx-scale));
  transform-origin: center;
}

.terminal {
  transform: perspective(1100px) rotateX(var(--fx-curve));
}

.terminal.macos {
  box-shadow: 0 0 var(--fx-glow-blur) var(--fx-glow-spread) var(--fx-glow-color);
}

.terminal.adwaita {
  box-shadow: 0px 2px 1px var(--adw-headerbar-shade-color),
    0 0 var(--fx-glow-blur) var(--fx-glow-spread) var(--fx-glow-color);
}

.terminal .content {
  font-family: var(--fx-font);
  line-height: var(--fx-line-height);
  color: var(--fx-fg-color);
  letter-spacing: var(--fx-letter-spacing);
  /* chromatic-aberration fringes, then phosphor afterglow, then glow halo */
  text-shadow:
    calc(var(--fx-ca) * -1) 0 rgba(255, 0, 0, 0.7),
    var(--fx-ca) 0 rgba(0, 255, 255, 0.7),
    0 0 var(--fx-afterglow) var(--fx-fg-color),
    0 0 calc(var(--fx-glow-blur) / 2) var(--fx-glow-color);
}

.terminal .content > div .b {
  color: var(--fx-accent-color);
}

/* --- overlays ------------------------------------------------------------ */

.fx-scanlines,
.fx-flicker,
.fx-vignette,
.fx-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 40;
}

.fx-noise {
  opacity: var(--fx-noise);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 160px 160px;
}

.fx-scanlines {
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, var(--fx-scanline-opacity)) 0 1px,
    transparent 1px 3px
  );
}

.fx-vignette {
  background: radial-gradient(
    ellipse at center,
    transparent 55%,
    rgba(0, 0, 0, var(--fx-vignette-opacity)) 100%
  );
}

.fx-flicker {
  background: #000;
  opacity: 0;
  animation: fx-flicker 0.35s infinite;
}

@keyframes fx-flicker {
  0% {
    opacity: 0;
  }
  7% {
    opacity: var(--fx-flicker-amp);
  }
  11% {
    opacity: calc(var(--fx-flicker-amp) * 0.3);
  }
  24% {
    opacity: 0;
  }
  55% {
    opacity: calc(var(--fx-flicker-amp) * 0.6);
  }
  61% {
    opacity: 0;
  }
  82% {
    opacity: var(--fx-flicker-amp);
  }
  86% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fx-flicker {
    animation: none;
  }
}

/* --- panel chrome --------------------------------------------------------- */

.fx-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 60;
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  color: var(--gray-6);
  background: var(--gray-1);
  border: 1px solid var(--gray-3);
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
}

.fx-toggle:hover,
.fx-toggle[aria-expanded="true"] {
  color: var(--gray-0);
  background: var(--brand-color);
  border-color: var(--brand-color);
}

.fx-panel {
  position: fixed;
  top: 56px;
  right: 16px;
  z-index: 50;
  width: 340px;
  max-width: calc(100vw - 32px);
  max-height: calc(100dvh - 72px);
  overflow-y: auto;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--gray-6);
  background: var(--gray-1);
  border: 1px solid var(--gray-3);
  border-radius: 10px;
  padding: 14px 16px;
}

.fx-heading {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 400;
  color: var(--gray-5);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.fx-group {
  border: none;
  border-top: 1px solid var(--gray-3);
  margin: 0;
  padding: 10px 0 12px;
}

.fx-group legend {
  padding: 0 6px 0 0;
  color: var(--gray-5);
}

.fx-control {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) 120px 46px;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
}

.fx-control output {
  color: var(--gray-5);
  font-size: 11px;
  text-align: right;
}

.fx-control-check {
  grid-template-columns: auto 1fr;
  justify-content: start;
}

.fx-control input[type="range"] {
  width: 100%;
  accent-color: var(--brand-color);
}

.fx-control input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--brand-color);
}

.fx-control-select {
  grid-template-columns: minmax(120px, 1fr) 160px;
}

.fx-control select {
  width: 100%;
  font-family: inherit;
  font-size: 12px;
  color: var(--gray-6);
  background: var(--gray-0);
  border: 1px solid var(--gray-3);
  border-radius: 4px;
  padding: 4px;
}

.fx-control input[type="color"] {
  width: 32px;
  height: 22px;
  padding: 0;
  border: 1px solid var(--gray-3);
  border-radius: 4px;
  background: var(--gray-1);
  cursor: pointer;
}

.fx-reset {
  width: 100%;
  margin-top: 4px;
  font-family: inherit;
  font-size: 12px;
  color: var(--gray-6);
  background: transparent;
  border: 1px solid var(--gray-3);
  border-radius: 6px;
  padding: 7px 0;
  cursor: pointer;
}

.fx-reset:hover {
  color: var(--gray-0);
  background: var(--brand-color);
  border-color: var(--brand-color);
}

.fx-toggle:focus-visible,
.fx-panel input:focus-visible,
.fx-reset:focus-visible {
  outline: 2px solid var(--brand-color);
  outline-offset: 2px;
}