:root {
  --bg-primary: #0a0a0f;
  --bg-panel: #12121a;
  --border-neon: #00ff41;
  --border-magenta: #ff00ff;
  --border-cyan: #00ffff;
  --text-primary: #d0d0e0;
  --text-glitch: #ff00ff;
  --font-ui: 'Courier New', monospace;
  --font-header: 'Press Start 2P', cursive;
  --scanline-opacity: 0.03;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-ui);
  height: 100%;
  overflow: hidden;
}

#particle-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: -1;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---------- HEADER ---------- */
#main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: rgba(10, 10, 15, 0.9);
  border-bottom: 1px solid var(--border-neon);
  animation: headerBorderPulse 3s infinite;
  z-index: 5;
}

@keyframes headerBorderPulse {
  0% { border-bottom-color: var(--border-neon); }
  50% { border-bottom-color: var(--border-magenta); }
  100% { border-bottom-color: var(--border-neon); }
}

#logo {
  font-family: var(--font-header);
  font-size: 14px;
  color: #fff;
  text-shadow: 2px 0 #ff0000, -2px 0 #00ffff;
}

#header-status { display: flex; align-items: center; gap: 8px; font-size: 12px; text-transform: uppercase; }

#status-light {
  width: 10px; height: 10px;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px currentColor;
}
#status-light.green { background: var(--border-neon); color: var(--border-neon); }
#status-light.yellow { background: #ffea00; color: #ffea00; }
#status-light.red { background: #ff2b2b; color: #ff2b2b; }

#header-fps { font-size: 11px; color: var(--border-cyan); }

/* ---------- MAIN LAYOUT ---------- */
#main-container {
  flex: 1;
  display: flex;
  overflow: hidden;
}

#effect-panel, #controls-panel {
  width: 260px;
  background: var(--bg-panel);
  border: 1px inset #1e1e2a;
  overflow-y: auto;
  padding: 10px;
}

#effect-panel::-webkit-scrollbar, #controls-panel::-webkit-scrollbar { width: 6px; }
#effect-panel::-webkit-scrollbar-thumb, #controls-panel::-webkit-scrollbar-thumb {
  background: var(--border-neon);
  box-shadow: 0 0 4px var(--border-neon);
}
#effect-panel::-webkit-scrollbar-track, #controls-panel::-webkit-scrollbar-track { background: #060608; }

.category { margin-bottom: 18px; }
.cat-title {
  color: var(--border-cyan);
  font-size: 12px;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.effect-cmd {
  display: block;
  width: 100%;
  text-align: left;
  background: #0d0d14;
  color: var(--text-primary);
  border: 1px solid #2a2a3a;
  clip-path: polygon(0 0, 100% 0, 100% 80%, 95% 100%, 0 100%);
  padding: 8px 10px;
  margin-bottom: 6px;
  font-family: var(--font-ui);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.05s ease;
}
.effect-cmd:hover {
  border-color: var(--border-magenta) !important;
  box-shadow: 0 0 15px rgba(255, 0, 255, 0.3);
  transform: skewX(-2deg);
}
.effect-cmd.active {
  border-color: var(--border-neon) !important;
  box-shadow: 0 0 20px rgba(0, 255, 65, 0.4), inset 0 0 10px rgba(0, 255, 65, 0.1);
}
.effect-cmd.flash { background: #ffffff; color: #000; }
.effect-cmd.primary { border-color: var(--border-cyan); }

.cmd-select {
  width: 100%;
  background: #0d0d14;
  color: var(--text-primary);
  border: 1px solid #2a2a3a;
  padding: 6px;
  font-family: var(--font-ui);
  font-size: 12px;
  margin-bottom: 6px;
}

.cmd-input-group {
  display: flex;
  align-items: center;
  border: 1px solid #2a2a3a;
  background: #0d0d14;
  margin-bottom: 6px;
  padding: 4px 6px;
}
.prompt-symbol { color: var(--border-neon); font-size: 12px; margin-right: 6px; }
#shader-prompt {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 12px;
}

/* ---------- CANVAS ---------- */
#canvas-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
}

#canvas-wrapper {
  position: relative;
  border: 4px solid var(--border-neon);
  border-radius: 6px;
  box-shadow: 0 0 25px rgba(0,255,65,0.25);
}
#canvas-wrapper.processing {
  animation: canvasBorderCycle 0.6s linear infinite;
}
@keyframes canvasBorderCycle {
  0% { border-color: var(--border-neon); }
  33% { border-color: var(--border-cyan); }
  66% { border-color: var(--border-magenta); }
  100% { border-color: var(--border-neon); }
}

#main-canvas { display: block; background: #000; max-width: 80vw; max-height: 60vh; }

#crt-overlay {
  pointer-events: none;
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,0) 0px, rgba(0,0,0,0) 2px, rgba(0,255,65,var(--scanline-opacity)) 2px, rgba(0,255,65,var(--scanline-opacity)) 4px);
  z-index: 10;
  animation: scanlines 10s linear infinite;
}
@keyframes scanlines {
  0% { background-position: 0 0; }
  100% { background-position: 0 400px; }
}

#drop-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 2px dashed var(--border-magenta);
  cursor: pointer;
  background: rgba(10,10,15,0.6);
  z-index: 11;
}
#drop-overlay.hidden { display: none; }

.glitch-text {
  font-family: var(--font-header);
  font-size: 16px;
  color: var(--text-glitch);
  animation: glitch 0.3s infinite alternate;
  text-shadow: 2px 0 #ff00ff, -2px 0 #00ffff;
}
@keyframes glitch {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(2px, -2px); }
  60% { transform: translate(-2px, -2px); }
  80% { transform: translate(2px, 2px); }
  100% { transform: translate(0); }
}
.sub-text { font-size: 11px; color: #888; }

#corrupt-progress {
  position: absolute;
  bottom: 0; left: 0; width: 100%; height: 18px;
  background: #060608;
  display: none;
  z-index: 12;
  overflow: hidden;
  font-family: monospace;
  font-size: 12px;
  color: var(--border-neon);
}
#corrupt-progress.active { display: block; }
#corrupt-bar { padding-left: 4px; white-space: nowrap; }

#canvas-toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 12px;
}
#canvas-toolbar button {
  background: #0d0d14;
  color: var(--text-primary);
  border: 1px solid var(--border-cyan);
  padding: 6px 10px;
  font-family: var(--font-ui);
  cursor: pointer;
}
#canvas-toolbar button:hover { border-color: var(--border-magenta); }
#history-counter { color: var(--border-cyan); }

/* ---------- CONTROLS PANEL ---------- */

/* "Select an effect" hint shown before any effect is chosen */
.controls-hint {
  font-size: 10px;
  color: #444460;
  text-align: center;
  padding: 24px 8px;
  letter-spacing: 1px;
}

/* Title bar rendered above per-effect controls */
.controls-effect-title {
  font-size: 10px;
  color: var(--border-cyan);
  letter-spacing: 1px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid #1e1e2a;
}

.control-group { margin-bottom: 14px; }
.control-group label {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  color: #9a9ab0;
  margin-bottom: 4px;
}
.control-group label span { color: var(--border-neon); }

input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: #2a2a3a;
  position: relative;
  outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px;
  background: var(--border-neon);
  box-shadow: 0 0 6px var(--border-neon);
  cursor: pointer;
  border-radius: 0;
}
input[type=range]::-moz-range-thumb {
  width: 12px; height: 12px;
  background: var(--border-neon);
  box-shadow: 0 0 6px var(--border-neon);
  cursor: pointer;
  border: none;
}

.divider-glitch {
  border: none;
  border-top: 1px dashed var(--border-magenta);
  margin: 16px 0;
}

#active-effects-list label {
  display: block;
  font-size: 10px;
  color: #9a9ab0;
  margin-bottom: 6px;
}
#effect-log { list-style: none; padding: 0; margin: 0; font-size: 11px; }
#effect-log li {
  display: flex;
  justify-content: space-between;
  padding: 4px 6px;
  border-left: 2px solid var(--border-neon);
  background: #0d0d14;
  margin-bottom: 4px;
}
#effect-log li.empty-log { border-left-color: #333; color: #666; }
#effect-log li .remove-x { color: var(--border-magenta); cursor: pointer; }

#export-section { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.export-btn {
  background: #0d0d14;
  color: var(--text-primary);
  border: 1px solid var(--border-neon);
  padding: 10px;
  font-family: var(--font-ui);
  cursor: pointer;
  animation: exportPulse 2s infinite;
}
.export-btn.special { border-color: var(--border-magenta); }
@keyframes exportPulse {
  0% { box-shadow: 0 0 4px rgba(0,255,65,0.3); }
  50% { box-shadow: 0 0 14px rgba(0,255,65,0.6); }
  100% { box-shadow: 0 0 4px rgba(0,255,65,0.3); }
}

/* ---------- FOOTER ---------- */
#main-footer {
  display: flex;
  gap: 24px;
  padding: 6px 20px;
  font-size: 10px;
  color: #9a9ab0;
  border-top: 1px solid var(--border-neon);
  background: rgba(10,10,15,0.9);
  flex-shrink: 0;
}

/* ---------- RESPONSIVE ---------- */

/* Tablet: 769px – 1024px — narrow the side panels */
@media (max-width: 1024px) {
  #effect-panel, #controls-panel {
    width: 200px;
  }

  #logo {
    font-size: 11px;
  }

  #main-canvas {
    max-width: 85vw;
    max-height: 55vh;
  }
}

/* Mobile: ≤768px — stack panels above/below the canvas */
@media (max-width: 768px) {
  html, body {
    overflow: auto;
  }

  #app {
    height: auto;
    min-height: 100vh;
  }

  /* Header: single row, tighten spacing */
  #main-header {
    padding: 8px 12px;
    gap: 8px;
  }

  #logo {
    font-size: 9px;
  }

  #header-status {
    font-size: 10px;
  }

  #header-fps {
    font-size: 10px;
  }

  /* Stack three columns into a single column */
  #main-container {
    flex-direction: column;
    overflow: visible;
  }

  /* Side panels become full-width horizontal strips */
  #effect-panel, #controls-panel {
    width: 100%;
    max-height: 220px;
    overflow-y: auto;
    border: none;
    border-bottom: 1px solid #1e1e2a;
    padding: 10px 12px;
  }

  /* Effect panel: show buttons in a wrapping row */
  #effect-panel .panel-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  #effect-panel .category {
    flex: 1 1 160px;
    margin-bottom: 0;
  }

  /* Canvas section: full width, auto height */
  #canvas-section {
    width: 100%;
    padding: 10px;
  }

  #main-canvas {
    max-width: 92vw;
    max-height: 50vw;
  }

  /* Controls panel: sliders side-by-side in two columns */
  #controls-panel {
    border-top: 1px solid #1e1e2a;
    border-bottom: none;
  }

  #controls-panel > .control-group {
    display: inline-block;
    width: 48%;
    margin-right: 2%;
    vertical-align: top;
  }

  /* Keep the active effects list and export section full-width */
  #active-effects-list,
  #export-section,
  .divider-glitch {
    display: block;
    width: 100%;
    clear: both;
  }

  #export-section {
    flex-direction: row;
    flex-wrap: wrap;
    margin-top: 8px;
  }

  .export-btn {
    flex: 1 1 140px;
  }

  /* Canvas toolbar: center and allow wrapping */
  #canvas-toolbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  /* Footer: allow wrapping */
  #main-footer {
    flex-wrap: wrap;
    gap: 8px;
    padding: 6px 12px;
  }
}

/* Very small screens: ≤420px — further tighten */
@media (max-width: 420px) {
  #logo {
    font-size: 8px;
  }

  #header-fps {
    display: none;
  }

  #controls-panel > .control-group {
    width: 100%;
    margin-right: 0;
  }

  #main-canvas {
    max-width: 96vw;
    max-height: 60vw;
  }
}