:root {
  --bg: #0a0a0a;
  --bg2: #111318;
  --bg3: #1a1d24;
  --green: #33ff33;
  --green-dim: #0a3a0a;
  --amber: #ffaa00;
  --amber-dim: #3a2a00;
  --red: #ff3333;
  --cyan: #33ffff;
  --magenta: #ff33ff;
  --yellow: #ffff33;
  --gray: #888;
  --text: #c0c0c0;
  --border: #2a2d34;
  --panel-glow: 0 0 8px rgba(51,255,51,0.15);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

#root { min-height: 100vh; }

.scanlines {
  pointer-events: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
}

.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--panel-glow);
  overflow: hidden;
}

.panel-header {
  background: var(--bg3);
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--green);
}

.register-box {
  background: #050505;
  border: 1px solid #1a3a1a;
  border-radius: 6px;
  padding: 8px 12px;
  text-align: center;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.5), 0 0 4px rgba(51,255,51,0.1);
}

.register-label {
  font-size: 10px;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 2px;
}

.register-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--green);
  text-shadow: 0 0 8px rgba(51,255,51,0.4);
}

.register-extra {
  font-size: 9px;
  color: #666;
  margin-top: 2px;
}

.flag-bit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  transition: all 0.15s;
  cursor: default;
}

.flag-set {
  background: var(--green);
  color: #000;
  box-shadow: 0 0 6px rgba(51,255,51,0.6);
}

.flag-clear {
  background: #1a1a1a;
  color: #444;
  border: 1px solid #333;
}

.flag-flash {
  animation: flagPulse 0.4s ease;
}

@keyframes flagPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); filter: brightness(1.5); }
}

.btn {
  padding: 6px 14px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.btn:hover {
  background: #252830;
  border-color: var(--green);
  color: var(--green);
}

.btn-primary {
  background: #0a3a0a;
  border-color: var(--green);
  color: var(--green);
}

.btn-primary:hover {
  background: #0f4f0f;
  box-shadow: 0 0 8px rgba(51,255,51,0.3);
}

.btn-danger {
  border-color: var(--red);
  color: var(--red);
}

.btn-danger:hover {
  background: #3a0a0a;
}

.hex-input {
  background: #050505;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--green);
  font-family: inherit;
  font-size: 13px;
  padding: 8px;
  width: 100%;
  resize: vertical;
  outline: none;
}

.hex-input:focus {
  border-color: var(--green);
  box-shadow: 0 0 4px rgba(51,255,51,0.2);
}

.disasm-row {
  display: flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 12px;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: background 0.1s;
}

.disasm-row:hover {
  background: rgba(51,255,51,0.05);
}

.disasm-current {
  background: rgba(51,255,51,0.1) !important;
  border-left-color: var(--green);
}

.disasm-breakpoint {
  border-left-color: var(--red) !important;
}

.mem-byte {
  display: inline-block;
  width: 22px;
  text-align: center;
  font-size: 11px;
  cursor: pointer;
  padding: 1px 0;
  border-radius: 2px;
  transition: background 0.15s;
}

.mem-byte:hover {
  background: rgba(51,255,51,0.15);
}

.mem-read {
  animation: memRead 0.5s ease;
}

.mem-write {
  animation: memWrite 0.5s ease;
}

@keyframes memRead {
  0% { background: rgba(51,100,255,0.4); }
  100% { background: transparent; }
}

@keyframes memWrite {
  0% { background: rgba(255,51,51,0.4); }
  100% { background: transparent; }
}

.cycle-display {
  font-size: 28px;
  font-weight: 700;
  color: var(--amber);
  text-shadow: 0 0 10px rgba(255,170,0,0.4);
  text-align: center;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
}

.ror-bug-badge {
  background: rgba(255,51,51,0.15);
  color: var(--red);
  border: 1px solid rgba(255,51,51,0.3);
  animation: bugShake 0.3s ease;
}

@keyframes bugShake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

.terminal-output {
  background: #050505;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px;
  min-height: 60px;
  max-height: 120px;
  overflow-y: auto;
  font-size: 13px;
  color: var(--green);
  white-space: pre-wrap;
  word-break: break-all;
}

.log-entry {
  font-size: 10px;
  padding: 1px 4px;
  border-bottom: 1px solid rgba(42,45,52,0.5);
  white-space: nowrap;
}

.opcode-grid {
  display: grid;
  grid-template-columns: repeat(17, 1fr);
  gap: 1px;
  font-size: 8px;
  background: var(--border);
}

.opcode-cell {
  background: var(--bg2);
  padding: 2px;
  text-align: center;
  min-height: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
}

.opcode-cell:hover {
  background: var(--bg3);
}

.opcode-header {
  background: var(--bg3) !important;
  color: var(--amber);
  font-weight: 700;
  font-size: 9px;
}

.cat-misc { color: var(--gray); }
.cat-jump { color: var(--yellow); }
.cat-load { color: var(--cyan); }
.cat-arith { color: var(--green); }
.cat-shift { color: var(--magenta); }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

select {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

select:focus { border-color: var(--green); }

input[type="range"] {
  accent-color: var(--green);
}

.loading-screen {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.5s;
}

.loading-text {
  color: var(--green);
  font-size: 16px;
  text-shadow: 0 0 10px rgba(51,255,51,0.4);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}