@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Orbitron:wght@400;700;900&display=swap');

:root {
  --bg:          #080810;
  --bg-panel:    #0a100c;
  --accent:      rgb(0, 255, 140);    /* green — overridden by JS */
  --accent-dim:  rgba(0, 255, 140, 0.18);
  --accent-glow: rgba(0, 255, 140, 0.45);
  --data:        rgb(180, 255, 80);
  --data-dim:    rgba(180, 255, 80, 0.15);
  --warn:        #ffb700;             /* amber — fixed */
  --grid:        rgba(0, 255, 140, 0.08);
  --border:      rgba(0, 255, 140, 0.25);
  --border-dim:  rgba(0, 255, 140, 0.10);
  --text-hi:     rgba(255, 255, 255, 0.85);
  --text-lo:     rgba(140, 210, 160, 0.45);
  --mono:        'Share Tech Mono', 'Courier New', monospace;
  --head:        'Orbitron', sans-serif;
}

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

html { height: 100%; }

body {
  min-height: 100%;
  background: var(--bg);
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.18) 2px,
      rgba(0, 0, 0, 0.18) 4px
    );
  font-family: var(--mono);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 24px 40px;
}

#page-header {
  width: 100%;
  max-width: 900px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}

#page-header h1 {
  font-family: var(--head);
  font-size: clamp(13px, 2vw, 18px);
  font-weight: 900;
  letter-spacing: 0.22em;
  color: var(--accent);
  text-shadow: 0 0 18px var(--accent-glow), 0 0 40px var(--accent-glow);
  text-transform: uppercase;
}

#page-header .header-tag {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-lo);
  text-transform: uppercase;
}

#main {
  width: 100%;
  max-width: 1200px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

#canvas-wrap {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  border: 1px solid var(--border-dim);
}

#canvas-wrap::before,
#canvas-wrap::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  z-index: 5;
  pointer-events: none;
}
#canvas-wrap::before {
  top: -1px; left: -1px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
  box-shadow: -2px -2px 8px var(--accent-glow);
}
#canvas-wrap::after {
  bottom: -1px; right: -1px;
  border-bottom: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  box-shadow: 2px 2px 8px var(--accent-glow);
}

.corner-tr, .corner-bl {
  position: absolute;
  width: 18px; height: 18px;
  z-index: 5;
  pointer-events: none;
}
.corner-tr {
  top: -1px; right: -1px;
  border-top: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  box-shadow: 2px -2px 8px var(--accent-glow);
}
.corner-bl {
  bottom: -1px; left: -1px;
  border-bottom: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
  box-shadow: -2px 2px 8px var(--accent-glow);
}

#cfd-canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
}

#canvas-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 4px 10px;
  background: rgba(8, 8, 16, 0.75);
  border-top: 1px solid var(--border-dim);
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}
#canvas-label span {
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--text-lo);
  text-transform: uppercase;
}
#canvas-label .live-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--data);
  box-shadow: 0 0 6px var(--data);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

#control-panel {
  flex: 0 0 220px;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  box-shadow: 0 0 24px var(--accent-dim), inset 0 0 40px var(--grid);
}

.panel-section {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-dim);
}
.panel-section:last-child { border-bottom: none; }

.section-label {
  font-size: 8.5px;
  font-family: var(--head);
  letter-spacing: 0.2em;
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent-glow);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.btn-row {
  display: flex;
  gap: 8px;
}

.ctrl-btn {
  flex: 1;
  height: 34px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-hi);
  font-family: var(--head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: background 0.12s, border-color 0.12s, box-shadow 0.12s, color 0.12s;
  text-transform: uppercase;
  outline: none;
  position: relative;
  overflow: hidden;
}

.ctrl-btn::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.12s;
}

.ctrl-btn:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow), inset 0 0 12px var(--grid);
  color: #fff;
}
.ctrl-btn:hover::before { opacity: 1; }
.ctrl-btn:active { background: var(--accent-dim); }

#btn-play.playing {
  border-color: var(--data);
  color: var(--data);
  box-shadow: 0 0 10px rgba(0,255,157,0.3);
}
#btn-play.playing::before {
  background: linear-gradient(90deg, transparent, var(--data), transparent);
  opacity: 1;
}

.mode-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
}

.mode-btn {
  flex: 1;
  height: 28px;
  border: none;
  border-right: 1px solid var(--border);
  background: transparent;
  color: var(--text-lo);
  font-family: var(--head);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  outline: none;
}
.mode-btn:last-child { border-right: none; }

.mode-btn:hover {
  background: var(--accent-dim);
  color: var(--text-hi);
}

.mode-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent-glow);
  box-shadow: inset 0 -1px 0 var(--accent);
}

.slider-group { display: flex; flex-direction: column; gap: 7px; }
.slider-group + .slider-group { margin-top: 10px; }

.slider-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.slider-label {
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--text-lo);
  text-transform: uppercase;
}

.slider-value {
  font-size: 11px;
  color: var(--data);
  text-shadow: 0 0 6px rgba(0,255,157,0.5);
  min-width: 38px;
  text-align: right;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px; height: 11px;
  background: var(--accent);
  border: none;
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%); /* diamond */
  box-shadow: 0 0 8px var(--accent-glow);
  cursor: pointer;
  transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.3); }
input[type="range"]::-moz-range-thumb {
  width: 11px; height: 11px;
  border: none;
  background: var(--accent);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  box-shadow: 0 0 8px var(--accent-glow);
  cursor: pointer;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat-cell {
  border: 1px solid var(--border-dim);
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  background: rgba(0,0,0,0.3);
}

.stat-cell.full-width {
  grid-column: 1 / -1;
}

.stat-cell .s-label {
  font-size: 7.5px;
  letter-spacing: 0.16em;
  color: var(--text-lo);
  text-transform: uppercase;
}

.stat-cell .s-value {
  font-size: 12px;
  color: var(--data);
  text-shadow: 0 0 6px rgba(0,255,157,0.4);
  white-space: nowrap;
}

.stat-cell .s-value.warn { color: var(--warn); text-shadow: 0 0 6px rgba(255,183,0,0.4); }
.stat-cell .s-value.accent { color: var(--accent); text-shadow: 0 0 6px var(--accent-glow); }

#page-footer {
  width: 100%;
  max-width: 900px;
  margin-top: 16px;
  border-top: 1px solid var(--border-dim);
  padding-top: 8px;
  display: flex;
  justify-content: space-between;
}
#page-footer span {
  font-size: 8.5px;
  letter-spacing: 0.14em;
  color: var(--text-lo);
  text-transform: uppercase;
}

/* ── Palette picker ─────────────────────────────────────────────────────── */
#palette-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

#palette-toggle {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 10px;
  cursor: pointer;
  opacity: 0.4;
  padding: 0 4px;
  transition: opacity 0.15s, color 0.15s;
  line-height: 1;
}
#palette-toggle:hover { opacity: 1; }

#palette-menu {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel);
  border: 1px solid var(--border-dim);
  padding: 6px;
  gap: 6px;
  flex-direction: row;
  box-shadow: 0 0 16px var(--accent-dim);
}
#palette-menu.open { display: flex; }

.palette-swatch {
  width: 16px;
  height: 16px;
  border: 1px solid rgba(255,255,255,0.15);
  background: var(--sw);
  cursor: pointer;
  padding: 0;
  transition: transform 0.1s, box-shadow 0.1s;
}
.palette-swatch:hover {
  transform: scale(1.25);
  box-shadow: 0 0 8px var(--sw);
}
.palette-swatch.active {
  border-color: rgba(255,255,255,0.7);
  box-shadow: 0 0 6px var(--sw);
}

@media (max-width: 700px) {
  body { padding: 24px 12px 24px; }

  #page-header h1 { font-size: 12px; }

  #main {
    flex-direction: column;
    align-items: stretch;
  }

  #control-panel {
    flex: none;
    width: 100%;
    /* switch to horizontal-ish layout on small screens */
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .panel-section { border-bottom: none; border-right: 1px solid var(--border-dim); }
  .panel-section:nth-child(even) { border-right: none; }
  .panel-section:last-child, .panel-section:nth-last-child(2) { border-bottom: none; }
}