:root {
  --zx-black: #000000;
  --zx-blue: #0000D7;
  --zx-red: #D70000;
  --zx-magenta: #D700D7;
  --zx-green: #00D700;
  --zx-cyan: #00D7D7;
  --zx-yellow: #D7D700;
  --zx-white: #D7D7D7;
  --zx-bright-blue: #0000FF;
  --zx-bright-red: #FF0000;
  --zx-bright-magenta: #FF00FF;
  --zx-bright-green: #00FF00;
  --zx-bright-cyan: #00FFFF;
  --zx-bright-yellow: #FFFF00;
  --zx-bright-white: #FFFFFF;
  --header-bg: #8B4513;
  --header-bg-dark: #6B3410;
  --cell-bg: #F5DEB3;
  --cell-bg-hover: #FFE4B5;
  --border-color: #000000;
  --body-bg: #2A2A2A;
}

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

body {
  background-color: var(--body-bg);
  font-family: 'Share Tech Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

.pixel-font {
  font-family: 'Press Start 2P', cursive;
}

.mono-font {
  font-family: 'Share Tech Mono', monospace;
}

.rainbow-bar {
  height: 8px;
  display: flex;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

.rainbow-bar div {
  flex: 1;
  transition: height 0.3s ease;
}

.rainbow-bar:hover div {
  height: 12px;
}

.matrix-table {
  border-collapse: collapse;
  border: 3px solid var(--border-color);
  box-shadow: 0 0 0 1px rgba(0,0,0,0.3), 4px 4px 0 rgba(0,0,0,0.5);
}

.matrix-table th,
.matrix-table td {
  border: 2px solid var(--border-color);
  padding: 0;
  text-align: center;
  vertical-align: middle;
}

.matrix-table th {
  background-color: var(--header-bg);
  color: var(--zx-bright-white);
  font-weight: bold;
}

.header-port {
  background-color: var(--header-bg) !important;
  color: var(--zx-bright-white) !important;
  font-family: 'Press Start 2P', cursive;
  font-size: 14px;
  padding: 10px 12px;
  min-width: 80px;
}

.header-bit {
  background-color: var(--header-bg) !important;
  color: var(--zx-bright-white) !important;
  font-family: 'Press Start 2P', cursive;
  font-size: 14px;
  padding: 8px 10px;
}

.header-bit-num {
  background-color: var(--header-bg-dark) !important;
  color: var(--zx-bright-yellow) !important;
  font-family: 'Press Start 2P', cursive;
  font-size: 14px;
  padding: 8px 14px;
  min-width: 72px;
}

.port-cell {
  background-color: var(--header-bg);
  color: var(--zx-bright-white);
  font-family: 'Share Tech Mono', monospace;
  font-size: 16px;
  font-weight: bold;
  padding: 10px 10px;
  min-width: 80px;
  letter-spacing: 1px;
}

.key-cell {
  background-color: var(--cell-bg);
  color: var(--zx-black);
  font-family: 'Share Tech Mono', monospace;
  font-size: 18px;
  font-weight: bold;
  padding: 10px 14px;
  min-width: 72px;
  cursor: pointer;
  transition: all 0.12s ease;
  position: relative;
  user-select: none;
}

.key-cell:hover {
  background-color: var(--zx-bright-cyan) !important;
  color: var(--zx-black);
  transform: scale(1.05);
  z-index: 10;
  box-shadow: 0 0 12px rgba(0, 215, 215, 0.6);
}

.key-cell.active {
  background-color: var(--zx-bright-magenta) !important;
  color: var(--zx-bright-white);
  box-shadow: 0 0 16px rgba(215, 0, 215, 0.8);
}

.key-cell.row-highlight {
  background-color: #EED8A6;
}

.key-cell.col-highlight {
  background-color: #EED8A6;
}

.port-cell.row-highlight {
  background-color: #A0581A;
}

.header-bit-num.col-highlight {
  background-color: #8B4513;
}

.info-panel {
  background-color: var(--zx-black);
  border: 3px solid var(--zx-bright-cyan);
  color: var(--zx-bright-green);
  font-family: 'Share Tech Mono', monospace;
  box-shadow: 0 0 20px rgba(0, 215, 215, 0.3), inset 0 0 40px rgba(0, 0, 0, 0.8);
  position: relative;
  overflow: hidden;
}

.info-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 255, 0, 0.03) 2px,
    rgba(0, 255, 0, 0.03) 4px
  );
  pointer-events: none;
}

.flash-animation {
  animation: keyFlash 0.4s ease-out;
}

@keyframes keyFlash {
  0% { background-color: var(--zx-bright-white); color: var(--zx-black); transform: scale(1.15); }
  50% { background-color: var(--zx-bright-magenta); color: var(--zx-bright-white); }
  100% { background-color: var(--cell-bg); color: var(--zx-black); transform: scale(1); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeInUp 0.3s ease-out;
}

@keyframes scanline {
  0% { top: -10%; }
  100% { top: 110%; }
}

.scanline-effect::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(0, 255, 0, 0.1);
  animation: scanline 3s linear infinite;
  pointer-events: none;
}

@keyframes cursorBlink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.blink-cursor::after {
  content: '█';
  animation: cursorBlink 1s step-end infinite;
  color: var(--zx-bright-green);
}

.table-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 600px) {
  .header-port, .header-bit, .header-bit-num {
    font-size: 10px;
    padding: 6px 6px;
  }
  .port-cell {
    font-size: 12px;
    padding: 6px 4px;
    min-width: 58px;
  }
  .key-cell {
    font-size: 13px;
    padding: 8px 8px;
    min-width: 52px;
  }
  .pixel-font {
    font-size: 12px !important;
  }
}