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

:root {
  --amber: #FF9F00;
  --amber-dim: #7a4d00;
  --green: #33FF33;
  --green-dim: #0a5a0a;
  --bg-dark: #0a0a0a;
  --bg-panel: #141414;
  --bg-panel-inner: #0d0d0d;
  --border: #2a2a2a;
  --text-dim: #555;
  --red: #ff3333;
  --cyan: #00cccc;
  --magenta: #cc66ff;
  --blue: #4488ff;
  --yellow: #cccc00;
}

body {
  background: var(--bg-dark);
  color: var(--amber);
  font-family: 'VT323', monospace;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

#root { width: 100%; }

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 8px;
}

.header {
  text-align: center;
  padding: 12px 0 8px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.header h1 {
  font-size: 32px;
  text-shadow: 0 0 10px var(--amber), 0 0 20px rgba(255,159,0,0.3);
  letter-spacing: 2px;
}

.header .subtitle {
  font-size: 16px;
  color: var(--amber-dim);
  margin-top: 2px;
}

.power-led {
  width: 10px; height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-left: 10px;
  vertical-align: middle;
  box-shadow: 0 0 4px currentColor;
  transition: all 0.3s;
}
.power-led.off { background: #440000; color: #440000; }
.power-led.on { background: #00ff00; color: #00ff00; animation: pulse-led 2s infinite; }

@keyframes pulse-led {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.main-layout {
  display: grid;
  grid-template-columns: 260px 1fr 280px;
  gap: 8px;
  margin-top: 8px;
}

@media (max-width: 1100px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px;
}

.panel-title {
  font-size: 14px;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  margin-bottom: 6px;
  cursor: pointer;
  user-select: none;
}

.panel-title:hover { color: #ffb833; }

/* CRT Display */
.crt-bezel {
  background: #1a1a1a;
  border: 3px solid #333;
  border-radius: 12px;
  padding: 12px;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.8), 0 0 10px rgba(0,0,0,0.5);
  position: relative;
  overflow: hidden;
}

.crt-screen {
  position: relative;
  background: #050505;
  border-radius: 6px;
  overflow: hidden;
}

.crt-screen canvas {
  display: block;
  width: 100%;
  image-rendering: pixelated;
}

.crt-screen::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.15) 2px,
    rgba(0,0,0,0.15) 4px
  );
  pointer-events: none;
}

/* Buttons */
.hw-btn {
  font-family: 'VT323', monospace;
  font-size: 14px;
  padding: 6px 12px;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.1s;
  letter-spacing: 1px;
}

.hw-btn:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.5) !important;
}

.hw-btn-red {
  background: linear-gradient(180deg, #cc3333, #991111);
  color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
}

.hw-btn-green {
  background: linear-gradient(180deg, #33aa33, #117711);
  color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
}

.hw-btn-blue {
  background: linear-gradient(180deg, #3355cc, #112299);
  color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
}

.hw-btn-gray {
  background: linear-gradient(180deg, #555, #333);
  color: #ccc;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.05);
}

.hw-btn-amber {
  background: linear-gradient(180deg, #cc7700, #995500);
  color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
}

/* Register display */
.reg-panel {
  background: var(--bg-panel-inner);
  border: 1px solid #222;
  border-radius: 3px;
  padding: 6px;
}

.reg-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2px 4px;
  font-size: 18px;
}

.reg-label {
  color: var(--amber-dim);
  font-size: 13px;
  min-width: 28px;
}

.reg-value {
  color: var(--green);
  text-shadow: 0 0 6px rgba(51,255,51,0.4);
  font-size: 20px;
}

.flag-display {
  display: flex;
  gap: 3px;
  justify-content: center;
  margin-top: 4px;
}

.flag-bit {
  width: 22px;
  text-align: center;
  font-size: 13px;
  padding: 2px;
  border-radius: 2px;
}

.flag-bit.set {
  color: var(--green);
  text-shadow: 0 0 6px rgba(51,255,51,0.5);
  background: rgba(51,255,51,0.1);
}

.flag-bit.clear {
  color: #333;
}

/* Memory viewer */
.mem-row {
  font-size: 13px;
  white-space: pre;
  line-height: 1.4;
}

.mem-addr { color: var(--amber-dim); }
.mem-zp { color: var(--blue); }
.mem-stack { color: var(--green); }
.mem-vdu { color: var(--yellow); }
.mem-io { color: var(--cyan); }
.mem-rom { color: var(--magenta); }
.mem-ram { color: #aaa; }
.mem-ascii { color: #666; }

/* Hex keypad */
.hex-keypad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.hex-key {
  font-family: 'VT323', monospace;
  font-size: 18px;
  padding: 8px;
  background: linear-gradient(180deg, #444, #222);
  color: #ccc;
  border: 1px solid #555;
  border-radius: 3px;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 2px 3px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
  transition: all 0.05s;
}

.hex-key:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.6);
  background: linear-gradient(180deg, #333, #1a1a1a);
}

.hex-key.special {
  background: linear-gradient(180deg, #884400, #552200);
  color: var(--amber);
  border-color: #774400;
}

/* File upload */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 6px;
  padding: 16px;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
}

.drop-zone:hover, .drop-zone.active {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(255,159,0,0.03);
}

.rom-slot {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  font-size: 13px;
  border-bottom: 1px solid #1a1a1a;
}

.rom-indicator {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.rom-indicator.loaded { background: #33ff33; box-shadow: 0 0 4px #33ff33; }
.rom-indicator.empty { background: #550000; }

/* Speed slider */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  background: var(--amber);
  border-radius: 50%;
  cursor: pointer;
}

/* Disassembler */
.disasm-line {
  font-size: 13px;
  padding: 1px 4px;
  white-space: pre;
}

.disasm-line.current {
  background: rgba(255,159,0,0.15);
  color: var(--amber);
}

.disasm-line.breakpoint {
  background: rgba(255,0,0,0.15);
}

.disasm-addr { color: var(--amber-dim); }
.disasm-bytes { color: #555; }
.disasm-mnemonic { color: var(--green); }
.disasm-operand { color: #aaa; }

/* Memory map bar */
.memmap-bar {
  display: flex;
  height: 20px;
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.memmap-seg {
  cursor: pointer;
  position: relative;
  transition: opacity 0.2s;
}

.memmap-seg:hover { opacity: 0.8; }

/* Scrollbars */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Status bar */
.status-bar {
  display: flex;
  justify-content: space-between;
  padding: 6px 8px;
  font-size: 13px;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}

.status-bar .running { color: var(--green); }
.status-bar .halted { color: var(--red); }

/* Footer */
.footer {
  text-align: center;
  padding: 12px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.footer a {
  color: var(--amber-dim);
  text-decoration: none;
  font-size: 14px;
}

.footer a:hover { color: var(--amber); }

/* Input fields */
.hex-input {
  font-family: 'VT323', monospace;
  font-size: 16px;
  background: var(--bg-panel-inner);
  border: 1px solid var(--border);
  color: var(--green);
  padding: 4px 6px;
  border-radius: 2px;
  outline: none;
  width: 60px;
}

.hex-input:focus { border-color: var(--amber); }

.btn-group {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

/* Tooltip */
[data-tooltip] {
  position: relative;
}

[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: #222;
  color: var(--amber);
  padding: 4px 8px;
  border-radius: 3px;
  font-size: 12px;
  white-space: nowrap;
  z-index: 100;
  border: 1px solid var(--border);
  pointer-events: none;
}

/* CRT warmup */
@keyframes crt-warmup {
  0% { filter: brightness(0); }
  30% { filter: brightness(0.3) blur(2px); }
  100% { filter: brightness(1) blur(0); }
}

.crt-warming {
  animation: crt-warmup 0.8s ease-out;
}

.bottom-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 8px;
}

@media (max-width: 900px) {
  .bottom-panels { grid-template-columns: 1fr; }
}

.panel-scroll {
  max-height: 250px;
  overflow-y: auto;
  overflow-x: hidden;
}

.file-list-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 0;
  font-size: 12px;
  border-bottom: 1px solid #1a1a1a;
}

.file-list-item .fname { color: var(--amber); flex: 1; overflow: hidden; text-overflow: ellipsis; }
.file-list-item .fsize { color: var(--text-dim); min-width: 50px; text-align: right; }