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

:root {
  --green: #33ff33;
  --green-dim: #1a8a1a;
  --green-glow: #22cc2244;
  --amber: #ffaa00;
  --amber-dim: #8a6600;
  --bg: #0a0a0a;
  --bezel: #1a1714;
  --bezel-border: #3a3530;
  --panel-bg: #111110;
  --text-dim: #556655;
  --red: #cc2222;
}

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

#app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header { width: 100%; text-align: center; padding: 10px 0 6px; }
.title-bar {
  display: flex; align-items: center; justify-content: center; gap: 12px;
}
.apple-logo { font-size: 20px; color: var(--green-dim); }
h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: 18px; color: var(--green); letter-spacing: 4px;
  text-shadow: 0 0 10px var(--green-glow), 0 0 20px var(--green-glow);
}
.subtitle { font-size: 10px; color: var(--text-dim); letter-spacing: 2px; }

#main { width: 100%; display: flex; flex-direction: column; align-items: center; }

#monitor-bezel {
  background: var(--bezel);
  border: 3px solid var(--bezel-border);
  border-radius: 18px;
  padding: 18px 22px;
  box-shadow: inset 0 0 40px rgba(0,0,0,0.8), 0 0 30px rgba(0,0,0,0.6);
  position: relative;
  margin: 8px 0;
  max-width: 100%;
}

#monitor-inner {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
  box-shadow: inset 0 0 20px rgba(0,0,0,1);
}

#crt {
  display: block;
  width: 640px;
  max-width: 100%;
  height: auto;
  image-rendering: pixelated;
  border-radius: 6px;
}

#scanlines {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0,0,0,0.15) 1px,
    rgba(0,0,0,0.15) 2px
  );
  pointer-events: none;
  border-radius: 6px;
}

#screen-glow {
  position: absolute; top: -10px; left: -10px; right: -10px; bottom: -10px;
  border-radius: 16px;
  box-shadow: inset 0 0 60px rgba(51,255,51,0.04);
  pointer-events: none;
}

#control-strip {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; max-width: 686px;
  background: #141412; border: 1px solid #2a2a25;
  border-radius: 8px; padding: 8px 14px; margin: 6px 0;
  flex-wrap: wrap; gap: 8px;
}

.controls-left, .controls-center, .controls-right {
  display: flex; align-items: center; gap: 10px;
}

.led-group { display: flex; gap: 12px; }
.led-indicator { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.led-indicator label { font-size: 8px; color: var(--text-dim); letter-spacing: 1px; }
.led {
  width: 8px; height: 8px; border-radius: 50%;
  background: #222; border: 1px solid #333;
  transition: all 0.15s;
}
.led.on { background: var(--green); box-shadow: 0 0 6px var(--green), 0 0 12px var(--green-glow); }
.led.amber.on { background: var(--amber); box-shadow: 0 0 6px var(--amber), 0 0 12px rgba(255,170,0,0.3); }

.ctrl-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px; font-weight: 700;
  padding: 5px 10px; border: 1px solid #3a3a35;
  border-radius: 4px; cursor: pointer;
  background: #1e1e1a; color: var(--green-dim);
  letter-spacing: 1px; transition: all 0.1s;
  text-transform: uppercase;
}
.ctrl-btn:hover { background: #2a2a25; color: var(--green); border-color: var(--green-dim); }
.ctrl-btn:active { transform: scale(0.96); }

.power-btn { border-color: var(--green-dim); }
.power-btn.active { color: var(--green); border-color: var(--green); box-shadow: 0 0 8px var(--green-glow); }
.reset-btn { border-color: #552222; color: #aa4444; }
.reset-btn:hover { border-color: var(--red); color: #ff4444; }

.speed-control { display: flex; align-items: center; gap: 6px; }
.speed-control label { font-size: 8px; color: var(--text-dim); letter-spacing: 1px; }
.speed-control select, #preset-select {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px; background: #1a1a16; color: var(--green-dim);
  border: 1px solid #3a3a35; border-radius: 3px; padding: 3px 6px;
}

#extra-controls {
  display: flex; align-items: center; gap: 10px;
  max-width: 686px; width: 100%;
  padding: 4px 0;
}

/* Debug Panel */
#debug-panel {
  position: fixed; right: 0; top: 0; bottom: 0;
  width: 320px; background: var(--panel-bg);
  border-left: 2px solid #2a2a25;
  overflow-y: auto; padding: 12px;
  z-index: 100;
  transition: transform 0.2s;
}
#debug-panel.hidden { transform: translateX(100%); }

.debug-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px; border-bottom: 1px solid #2a2a25; padding-bottom: 8px;
}
.debug-header h2 { font-size: 12px; color: var(--amber); letter-spacing: 2px; }
.debug-controls { display: flex; gap: 4px; }
.dbg-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px; padding: 3px 8px;
  background: #1a1a16; color: var(--amber-dim);
  border: 1px solid #3a3530; border-radius: 3px;
  cursor: pointer; letter-spacing: 1px;
}
.dbg-btn:hover { color: var(--amber); border-color: var(--amber-dim); }

.debug-section { margin-bottom: 14px; }
.debug-section h3 {
  font-size: 9px; color: var(--amber-dim); letter-spacing: 2px;
  margin-bottom: 6px; display: flex; align-items: center; gap: 8px;
}
.debug-section h3 input {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px; background: #0a0a0a; color: var(--amber);
  border: 1px solid #3a3530; border-radius: 2px;
  padding: 2px 6px; width: 60px;
}

.register-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px;
}
.register-grid div {
  text-align: center; background: #0a0a08; border: 1px solid #1a1a16;
  border-radius: 3px; padding: 4px 2px;
}
.register-grid label { display: block; font-size: 8px; color: var(--amber-dim); }
.register-grid span { font-size: 12px; color: var(--amber); font-weight: 700; }

.flag-grid { display: flex; gap: 8px; }
.flag-item { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.flag-item label { font-size: 8px; color: var(--amber-dim); }
.flag-led {
  width: 10px; height: 10px; border-radius: 50%;
  background: #221a00; border: 1px solid #3a3530;
}
.flag-led.on { background: var(--amber); box-shadow: 0 0 6px var(--amber); }

#disasm, #memdump {
  font-size: 10px; line-height: 1.5;
  color: var(--green-dim); background: #0a0a08;
  border: 1px solid #1a1a16; border-radius: 3px;
  padding: 6px 8px; overflow-x: auto;
  white-space: pre; max-height: 200px; overflow-y: auto;
}

/* Modals */
.modal {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85); z-index: 200;
  display: flex; align-items: center; justify-content: center;
}
.modal.hidden { display: none; }
.modal-content {
  background: #141412; border: 2px solid var(--bezel-border);
  border-radius: 12px; padding: 24px; max-width: 520px; width: 90%;
  max-height: 80vh; overflow-y: auto; position: relative;
}
.modal-content h2 {
  font-size: 14px; color: var(--green); margin-bottom: 14px;
  letter-spacing: 2px;
}
.modal-content h3 { font-size: 11px; color: var(--amber); margin: 12px 0 6px; }
.modal-content p, .modal-content li {
  font-size: 11px; color: #889988; line-height: 1.6;
}
.modal-content ul { padding-left: 18px; }
.modal-content code {
  background: #0a0a08; padding: 1px 5px; border-radius: 2px; color: var(--green);
  font-size: 11px;
}
.modal-close {
  position: absolute; top: 10px; right: 14px;
  background: none; border: none; color: var(--green-dim);
  font-size: 22px; cursor: pointer;
}
.modal-close:hover { color: var(--green); }

#load-textarea {
  width: 100%; font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; background: #0a0a08; color: var(--green);
  border: 1px solid #2a2a25; border-radius: 4px;
  padding: 8px; resize: vertical; margin-bottom: 10px;
}

footer {
  margin-top: 20px; padding: 10px;
  text-align: center;
}
footer a { color: #333; font-size: 10px; text-decoration: none; }
footer a:hover { color: #555; }

/* CRT power-on animation */
@keyframes powerOn {
  0% { filter: brightness(0) blur(20px); transform: scaleY(0.01); }
  30% { filter: brightness(0.3) blur(10px); transform: scaleY(0.01); }
  50% { filter: brightness(0.5) blur(5px); transform: scaleY(1); }
  100% { filter: brightness(1) blur(0); transform: scaleY(1); }
}

#crt.power-on { animation: powerOn 0.6s ease-out forwards; }
#crt.off { filter: brightness(0); }

/* Responsive */
@media (max-width: 700px) {
  #crt { width: 100%; }
  #monitor-bezel { padding: 10px 12px; border-radius: 12px; }
  #control-strip { flex-direction: column; gap: 6px; }
  .controls-left, .controls-center, .controls-right { justify-content: center; flex-wrap: wrap; }
  #debug-panel { width: 100%; }
  h1 { font-size: 14px; }
  .subtitle { font-size: 8px; }
}