:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #1c2128;
  --border: #30363d;
  --green: #00ff41;
  --green-dim: #00cc33;
  --blue: #58a6ff;
  --red: #f85149;
  --yellow: #d29922;
  --orange: #e3b341;
  --cyan: #56d4dd;
  --text: #c9d1d9;
  --text-dim: #8b949e;
}

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

body {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text);
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #484f58; }

.font-mono { font-family: 'Fira Code', 'Courier New', monospace !important; }

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 4px var(--green); }
  50% { box-shadow: 0 0 12px var(--green), 0 0 20px rgba(0,255,65,0.3); }
}

@keyframes flash-change {
  0% { background: rgba(210,153,34,0.4); }
  100% { background: transparent; }
}

.blink-cursor {
  animation: blink 1s infinite;
}

.pulse-running {
  animation: pulse-green 1.5s ease-in-out infinite;
}

.reg-changed {
  animation: flash-change 0.8s ease-out;
}

.terminal-container {
  position: relative;
  background: #0a0a0a;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.crt-overlay {
  pointer-events: none;
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0,0,0,0.15) 0px,
    rgba(0,0,0,0.15) 1px,
    transparent 1px,
    transparent 3px
  );
  z-index: 2;
}

.terminal-text {
  font-family: 'Fira Code', monospace;
  color: var(--green);
  font-size: 13px;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-all;
  padding: 12px;
  min-height: 300px;
  max-height: 500px;
  overflow-y: auto;
  position: relative;
  z-index: 1;
}

.terminal-text:focus {
  outline: none;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg-tertiary);
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--blue);
  background: rgba(88,166,255,0.05);
}

.drop-zone.loaded {
  border-color: var(--green);
  border-style: solid;
  background: rgba(0,255,65,0.03);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-secondary);
  color: var(--text);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.btn:hover {
  background: var(--bg-tertiary);
  border-color: #484f58;
}

.btn-primary {
  background: rgba(0,255,65,0.1);
  border-color: var(--green-dim);
  color: var(--green);
}

.btn-primary:hover {
  background: rgba(0,255,65,0.2);
}

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

.btn-danger:hover {
  background: rgba(248,81,73,0.1);
}

.hex-input {
  font-family: 'Fira Code', monospace;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 4px 8px;
  font-size: 12px;
  width: 120px;
}

.hex-input:focus {
  outline: none;
  border-color: var(--blue);
}

.panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.panel-header {
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.panel-header:hover {
  background: rgba(255,255,255,0.03);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  font-family: 'Fira Code', monospace;
  text-transform: uppercase;
}

.status-halted {
  background: rgba(248,81,73,0.15);
  color: var(--red);
  border: 1px solid rgba(248,81,73,0.3);
}

.status-running {
  background: rgba(0,255,65,0.1);
  color: var(--green);
  border: 1px solid rgba(0,255,65,0.3);
}

.status-paused {
  background: rgba(210,153,34,0.15);
  color: var(--yellow);
  border: 1px solid rgba(210,153,34,0.3);
}

.glow-title {
  text-shadow: 0 0 10px rgba(0,255,65,0.5), 0 0 30px rgba(0,255,65,0.2);
}

select, option {
  background: var(--bg-primary);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 12px;
  font-family: 'IBM Plex Sans', sans-serif;
}

select:focus { outline: none; border-color: var(--blue); }

.memory-row:hover { background: rgba(255,255,255,0.03); }

@media (max-width: 768px) {
  .terminal-text {
    font-size: 11px;
    min-height: 200px;
    max-height: 350px;
  }
}