/* ============================================================
   CGA PALETTE GENERATOR - STYLES
   ============================================================ */

:root {
  /* Canonical CGA 16-color RGBI palette */
  --cga-black:       #000000;
  --cga-blue:        #0000AA;
  --cga-green:       #00AA00;
  --cga-cyan:        #00AAAA;
  --cga-red:         #AA0000;
  --cga-magenta:     #AA00AA;
  --cga-brown:       #AA5500;
  --cga-lgray:       #AAAAAA;
  --cga-dgray:       #555555;
  --cga-lblue:       #5555FF;
  --cga-lgreen:      #55FF55;
  --cga-lcyan:       #55FFFF;
  --cga-lred:        #FF5555;
  --cga-lmagenta:    #FF55FF;
  --cga-yellow:      #FFFF55;
  --cga-white:       #FFFFFF;

  --bg: #000000;
  --bg-soft: #0a0a0a;
  --panel: #0d0d12;
  --panel-edge: #2a2a44;
  --ink: #cfcfff;
  --ink-dim: #6a6a8a;
  --accent: var(--cga-lcyan);
  --accent-2: var(--cga-lmagenta);
  --accent-3: var(--cga-yellow);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Courier New", "Lucida Console", monospace;
  font-size: 15px;
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: none;
  text-rendering: optimizeSpeed;
  letter-spacing: .3px;
}

/* ---------- PLASMA BACKGROUND ---------- */
#plasma {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  opacity: .18;
  image-rendering: pixelated;
  filter: blur(.4px);
}

/* ---------- CRT OVERLAY ---------- */
#crt-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(0,0,0,0) 0,
      rgba(0,0,0,0) 2px,
      rgba(0,0,0,.25) 3px
    );
  mix-blend-mode: multiply;
}
body[data-scanlines="off"] #crt-overlay { display: none; }

/* CRT mask = subtle RGB triad + vignette */
body[data-crt="on"]::after {
  content: "";
  position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  background:
    radial-gradient(ellipse at center, rgba(0,0,0,0) 55%, rgba(0,0,0,.55) 100%);
}

/* flicker */
body[data-flicker="on"] #crt-overlay { animation: flicker .12s steps(2) infinite; }
@keyframes flicker {
  0% { opacity: 1; }
  100% { opacity: .82; }
}

/* chroma aberration text on headings */
body[data-chroma="on"] h2 { animation: chroma 2.4s infinite; }
@keyframes chroma {
  0%,100% { text-shadow: -1px 0 var(--cga-lred), 1px 0 var(--cga-lcyan); }
  50%     { text-shadow:  1px 0 var(--cga-lred), -1px 0 var(--cga-lcyan); }
}

/* extra vignette toggle */
body[data-vignette="on"] { box-shadow: inset 0 0 200px 60px rgba(0,0,0,.9); }

/* ---------- HERO ---------- */
.hero {
  text-align: center;
  padding: 64px 16px 24px;
  position: relative;
}
.ascii-logo {
  color: var(--accent);
  font-size: clamp(8px, 2.4vw, 16px);
  line-height: 1.05;
  text-shadow: 0 0 8px var(--cga-cyan), 0 0 2px var(--cga-white);
  white-space: pre;
  overflow-x: auto;
  display: inline-block;
}
.tagline {
  margin-top: 18px;
  color: var(--accent-3);
  letter-spacing: 4px;
  font-size: 13px;
  text-shadow: 0 0 6px var(--cga-yellow);
}
.status-bar {
  margin-top: 14px;
  font-size: 12px;
  color: var(--ink-dim);
  letter-spacing: 2px;
}
.status-bar .sep { color: var(--cga-magenta); margin: 0 8px; }
#clock { color: var(--accent-2); }

/* ---------- LAYOUT ---------- */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 80px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.panel {
  background: linear-gradient(180deg, var(--panel) 0%, #07070b 100%);
  border: 1px solid var(--panel-edge);
  border-radius: 2px;
  padding: 20px;
  box-shadow: inset 0 0 0 1px rgba(0,170,170,.05);
  position: relative;
}
.panel::before {
  content: "";
  position: absolute; top: -1px; left: -1px; right: -1px; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  opacity: .6;
}
.panel h2 {
  color: var(--accent);
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 6px;
  text-shadow: 0 0 6px rgba(0,170,170,.5);
}
.hint {
  font-size: 12px;
  color: var(--ink-dim);
  margin-bottom: 14px;
}

/* ---------- SWATCH GRID ---------- */
.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 8px;
}
.swatch {
  position: relative;
  cursor: pointer;
  border: 1px solid #222;
  transition: transform .08s, box-shadow .12s;
  overflow: hidden;
}
.swatch .chip {
  width: 100%;
  height: 64px;
  image-rendering: pixelated;
}
.swatch .meta {
  background: #000;
  color: var(--ink);
  font-size: 10px;
  padding: 4px 6px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid #222;
}
.swatch .meta b { color: var(--accent-3); }
.swatch:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px var(--accent), 0 6px 18px rgba(0,170,170,.25);
  z-index: 2;
}

/* ---------- MODE PALETTES ---------- */
.palette-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.palette-tab {
  background: #111;
  border: 1px solid var(--panel-edge);
  color: var(--ink-dim);
  padding: 8px 12px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 1px;
  transition: all .1s;
}
.palette-tab:hover { color: var(--accent); border-color: var(--accent); }
.palette-tab.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(0,170,170,.6);
}
.mode-display {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.mode-cell {
  height: 80px;
  border: 1px solid #222;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 6px;
  font-size: 10px;
  color: rgba(0,0,0,.0);
  text-shadow: 0 0 2px #000;
  position: relative;
}
.mode-cell .idx {
  background: rgba(0,0,0,.7);
  color: #fff;
  padding: 1px 5px;
}

/* ---------- GRADIENT FORGE ---------- */
.gradient-builder {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.stops {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  min-height: 44px;
}
.stop {
  height: 40px;
  flex: 1 1 60px;
  border: 1px solid #333;
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-weight: bold;
  font-size: 11px;
  text-shadow: 0 0 2px rgba(255,255,255,.6);
}
.stop .x {
  position: absolute; top: 2px; right: 4px;
  font-size: 12px; color: rgba(0,0,0,.7); cursor: pointer;
  line-height: 1;
}
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}
.control { display: flex; flex-direction: column; gap: 4px; font-size: 11px; }
.control label { color: var(--accent-2); letter-spacing: 1px; }
.control.inline { flex-direction: row; align-items: center; gap: 6px; }
.control select, .control input[type="range"] {
  background: #000; color: var(--ink);
  border: 1px solid var(--panel-edge);
  padding: 4px 6px;
  font-family: inherit;
}
.control input[type="range"] { width: 120px; accent-color: var(--accent); }
.control span { color: var(--accent-3); font-size: 11px; }

.btn {
  background: transparent;
  border: 1px solid var(--accent-2);
  color: var(--accent-2);
  padding: 8px 12px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .1s;
}
.btn:hover {
  background: var(--accent-2);
  color: #000;
  box-shadow: 0 0 10px rgba(170,0,170,.5);
}
.btn:active { transform: scale(.96); }

.gradient-preview {
  height: 80px;
  border: 1px solid #333;
  image-rendering: pixelated;
}
.gradient-code {
  background: #000;
  border: 1px solid #222;
  padding: 10px;
  font-size: 12px;
  color: var(--cga-lgreen);
  word-break: break-all;
}

/* ---------- DITHER ---------- */
.dither-controls {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  margin-bottom: 14px;
}
.dither-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.dither-stage canvas {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  background: #000;
  border: 1px solid #222;
  image-rendering: pixelated;
}
.dither-stage canvas::after { content: ""; }

/* ---------- FX ---------- */
.fx-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.fx-toggle {
  background: #111;
  border: 1px solid var(--panel-edge);
  color: var(--ink-dim);
  padding: 10px 14px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .1s;
}
.fx-toggle.active {
  background: var(--accent-3);
  color: #000;
  border-color: var(--accent-3);
  box-shadow: 0 0 10px rgba(255,255,85,.4);
}
.fx-note {
  margin-top: 14px; font-size: 12px; color: var(--ink-dim);
}
.fx-note span { color: var(--accent-3); }

/* ---------- FOOTER ---------- */
footer {
  text-align: center;
  padding: 30px 16px;
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 1px;
}

/* ---------- TOAST ---------- */
#toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--accent-3);
  color: #000;
  padding: 10px 20px;
  font-size: 12px;
  font-weight: bold;
  letter-spacing: 1px;
  opacity: 0;
  pointer-events: none;
  transition: all .2s;
  z-index: 10000;
  box-shadow: 0 0 20px rgba(255,255,85,.6);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- DEMO SCENE ---------- */
.demo { padding: 0; overflow: hidden; }
.demo > h2, .demo > .hint { padding: 20px 20px 0; }
.demo-frame {
  position: relative;
  margin: 14px 20px 0;
  border: 1px solid var(--panel-edge);
  background: #000;
  overflow: hidden;
}
#demo-canvas {
  display: block;
  width: 100%;
  aspect-ratio: 320/200;
  image-rendering: pixelated;
  background: #000;
}
/* HUD overlay */
.demo-hud {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  padding: 6px 10px;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--accent-3);
  background: linear-gradient(0deg, rgba(0,0,0,.85), rgba(0,0,0,0));
  text-shadow: 0 0 4px #000;
  pointer-events: none;
}
.demo-hud .hud-name { color: var(--accent); }
.demo-hud .hud-name b { color: var(--accent-3); text-shadow: 0 0 6px var(--cga-yellow); }
.demo-hud .hud-meta i { color: var(--accent-2); font-style: normal; }

/* boot typewriter overlay */
#boot-text {
  position: absolute;
  inset: 0;
  padding: 14px;
  font-size: 13px;
  color: var(--cga-lgreen);
  white-space: pre;
  background: #000;
  z-index: 3;
  text-shadow: 0 0 6px var(--cga-green);
  line-height: 1.5;
}
#boot-text.done { opacity: 0; transition: opacity .4s; }

.demo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px 20px 0;
}
.demo-controls .ctrl-hint {
  font-size: 11px; color: var(--ink-dim); letter-spacing: 1px; margin-left: auto;
}
#auto-toggle { border-color: var(--accent); color: var(--accent); }
#auto-toggle.active { background: var(--accent); color: #000; box-shadow: 0 0 10px rgba(0,170,170,.5); }

.fx-select {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 14px 20px 20px;
}
.fx-pick {
  background: #0c0c12;
  border: 1px solid var(--panel-edge);
  color: var(--ink-dim);
  padding: 7px 11px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .1s;
}
.fx-pick:hover { color: var(--accent); border-color: var(--accent); }
.fx-pick.active {
  background: var(--accent-2);
  color: #000;
  border-color: var(--accent-2);
  box-shadow: 0 0 10px rgba(170,0,170,.5);
}

/* ---------- 4K DITHER STUDIO ---------- */
.grad-opts { display: none; }
.grad-opts.show { display: contents; }
#grad-pal-ctl { display: none; }
#grad-pal-ctl.show { display: flex; }
.ctl input[type="color"] {
  width: 100%; height: 26px; padding: 0;
  border: 1px solid var(--panel-edge);
  background: #000; cursor: pointer;
}

.studio-grid {
  display: grid;
  grid-template-columns: minmax(180px, 260px) 1fr;
  gap: 16px;
  margin-bottom: 14px;
}
.dropzone {
  border: 2px dashed var(--panel-edge);
  background: #07070b;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  min-height: 150px;
  padding: 16px;
  transition: all .12s;
}
.dropzone.hot, .dropzone:hover {
  border-color: var(--accent);
  background: #0b0e14;
  box-shadow: inset 0 0 24px rgba(0,170,170,.18);
}
.dz-icon { color: var(--accent); font-size: 12px; letter-spacing: 1px; margin-bottom: 8px; }
.dz-sub { color: var(--ink-dim); font-size: 11px; word-break: break-all; }

.studio-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  align-content: start;
}
.ctl {
  display: flex; flex-direction: column; gap: 4px;
  font-size: 10px; letter-spacing: 1px; color: var(--accent-2);
}
.ctl select, .ctl input[type="range"] {
  background: #000; color: var(--ink);
  border: 1px solid var(--panel-edge);
  padding: 5px 6px; font-family: inherit; font-size: 12px;
}
.ctl input[type="range"] { width: 100%; accent-color: var(--accent); }
.ctl span { color: var(--accent-3); font-size: 11px; }
.ctl-inline {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px; color: var(--ink-dim); letter-spacing: 1px; white-space: nowrap;
}
.ctl-inline input { accent-color: var(--accent-3); }
.studio-actions {
  grid-column: 1 / -1;
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  margin-top: 4px;
}

.progress {
  position: relative;
  height: 18px;
  background: #000;
  border: 1px solid var(--panel-edge);
  margin-bottom: 14px;
  overflow: hidden;
}
#d-prog {
  position: absolute; inset: 0; width: 0;
  background: linear-gradient(90deg, var(--cga-green), var(--cga-lcyan), var(--cga-yellow));
  transition: width .15s;
}
#d-prog-t {
  position: absolute; inset: 0;
  display: flex; align-items: center; padding-left: 8px;
  font-size: 11px; color: var(--ink); letter-spacing: 1px;
  mix-blend-mode: difference;
}

.studio-stage {
  border: 1px solid var(--panel-edge);
  background:
    repeating-conic-gradient(#111 0% 25%, #0a0a0a 0% 50%) 0 0/16px 16px;
  max-height: 60vh;
  overflow: auto;
  display: flex;
  justify-content: center;
}
#d-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}
.studio-meta {
  margin-top: 10px;
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 1px;
}

@media (max-width: 640px) {
  .studio-grid { grid-template-columns: 1fr; }
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 640px) {
  .dither-stage { grid-template-columns: 1fr; }
  .mode-display { grid-template-columns: repeat(2, 1fr); }
  .ascii-logo { font-size: 7px; }
}

/* prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}