:root {
  --green: #33ff33;
  --green-dim: #1a8c1a;
  --green-glow: #33ff3366;
  --bg: #0a0a0a;
  --panel-bg: #131313;
  --section-bg: #1a1a1a;
  --border: #2a2a2a;
  --text: #cccccc;
  --text-dim: #666666;
  --yellow: #ffb000;
  --red: #ff3333;
}

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

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

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

header {
  text-align: center;
  padding: 20px 0 10px;
  position: relative;
}

header h1 {
  font-family: 'Press Start 2P', cursive;
  font-size: clamp(16px, 4vw, 28px);
  color: var(--green);
  text-shadow: 0 0 10px var(--green-glow), 0 0 30px var(--green-glow);
  letter-spacing: 2px;
}

.subtitle {
  font-size: 12px;
  color: var(--green-dim);
  margin-top: 6px;
  letter-spacing: 3px;
}

.badge {
  position: absolute;
  top: 10px;
  right: 0;
  font-size: 11px;
  color: var(--text-dim);
  background: #1a1a1a;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

#main-area {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  align-items: flex-start;
}

#crt-bezel {
  background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
  border-radius: 20px;
  padding: 20px;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.8), 0 0 20px rgba(0,0,0,0.5);
  flex-shrink: 0;
}

#crt-inner {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  box-shadow: inset 0 0 60px rgba(0,0,0,0.9);
}

#screen {
  display: block;
  width: 640px;
  height: 400px;
  image-rendering: pixelated;
}

#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;
}

#control-panel {
  flex: 1;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-section {
  background: var(--section-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}

.panel-section h2 {
  font-family: 'Press Start 2P', cursive;
  font-size: 10px;
  color: var(--green);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.file-btn {
  display: inline-block;
  background: #222;
  border: 1px solid var(--green-dim);
  color: var(--green);
  padding: 8px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  transition: all 0.15s;
}
.file-btn:hover { background: #2a2a2a; border-color: var(--green); }
.file-btn input { display: none; }
.file-btn.small { font-size: 11px; padding: 6px 10px; }

#rom-status-grid {
  margin-top: 10px;
  display: grid;
  gap: 4px;
  font-size: 10px;
}

.rom-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3px 6px;
  background: #151515;
  border-radius: 3px;
}

.rom-row .rom-name { color: var(--text-dim); flex: 1; font-size: 9px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rom-row .rom-addr { color: var(--green-dim); margin: 0 8px; font-size: 9px; }
.rom-row .rom-status { font-size: 11px; }

#ram-selector {
  display: flex;
  gap: 6px;
}

.ram-btn {
  flex: 1;
  background: #222;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 6px;
  border-radius: 4px;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  transition: all 0.15s;
}
.ram-btn:hover { border-color: var(--green-dim); color: var(--text); }
.ram-btn.active {
  border-color: var(--green);
  color: var(--green);
  background: #1a2a1a;
  box-shadow: 0 0 8px var(--green-glow);
}

#power-buttons {
  display: flex;
  gap: 8px;
}

.power-btn {
  flex: 1;
  padding: 10px 8px;
  border: 2px solid;
  border-radius: 6px;
  cursor: pointer;
  font-family: 'Press Start 2P', cursive;
  font-size: 8px;
  letter-spacing: 0.5px;
  transition: all 0.15s;
  background: transparent;
}
.power-btn.green { border-color: var(--green); color: var(--green); }
.power-btn.green:hover { background: #1a3a1a; box-shadow: 0 0 12px var(--green-glow); }
.power-btn.green:active { background: #0a2a0a; }
.power-btn.yellow { border-color: var(--yellow); color: var(--yellow); }
.power-btn.yellow:hover { background: #3a2a0a; box-shadow: 0 0 12px #ffb00044; }
.power-btn.red { border-color: var(--red); color: var(--red); }
.power-btn.red:hover { background: #3a0a0a; box-shadow: 0 0 12px #ff333344; }

#peripheral-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 10px;
}

.tab-btn {
  background: #222;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 4px 8px;
  border-radius: 4px 4px 0 0;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  background: var(--section-bg);
  border-color: var(--green-dim);
  border-bottom-color: var(--section-bg);
  color: var(--green);
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.periph-label {
  font-size: 10px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.device-label {
  font-size: 11px;
  color: var(--text-dim);
  display: block;
  margin-top: 8px;
}
.device-label select {
  background: #222;
  border: 1px solid var(--border);
  color: var(--green);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}

.info-text {
  font-size: 10px;
  color: var(--yellow);
  margin-top: 6px;
  min-height: 14px;
}

.action-btn {
  background: #222;
  border: 1px solid var(--green-dim);
  color: var(--green);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  margin-top: 6px;
  transition: all 0.15s;
}
.action-btn:hover:not(:disabled) { background: #2a2a2a; border-color: var(--green); }
.action-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* Keyboard */
#keyboard-section {
  margin-top: 20px;
  background: var(--section-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}

#keyboard-section h2 {
  font-family: 'Press Start 2P', cursive;
  font-size: 10px;
  color: var(--green);
  margin-bottom: 10px;
  text-transform: uppercase;
}

#pet-keyboard {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kb-row {
  display: flex;
  gap: 3px;
  align-items: center;
  flex-wrap: wrap;
}

.kb-row .numpad-sep { width: 12px; }

.kb-key {
  background: #2a2a2a;
  border: 1px solid #3a3a3a;
  color: #ccc;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  min-width: 32px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  cursor: pointer;
  user-select: none;
  padding: 0 4px;
  transition: all 0.08s;
  white-space: nowrap;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
}
.kb-key:hover { background: #3a3a3a; border-color: var(--green-dim); }
.kb-key:active, .kb-key.pressed {
  background: var(--green-dim);
  color: #000;
  transform: translateY(1px);
}
.kb-key.wide { min-width: 56px; font-size: 8px; }
.kb-key.wider { min-width: 72px; }
.kb-key.space-key { min-width: 180px; }

/* Debug */
#debug-section {
  margin-top: 16px;
}

#debug-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 6px 12px;
  cursor: pointer;
  border-radius: 4px;
  width: 100%;
  text-align: left;
}
#debug-toggle:hover { color: var(--text); border-color: var(--green-dim); }

#debug-panel {
  background: var(--section-bg);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 8px 8px;
  padding: 12px;
  overflow: hidden;
  transition: max-height 0.3s;
}
#debug-panel.collapsed { max-height: 0; padding: 0 12px; border: none; }

#debug-regs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 11px;
  margin-bottom: 10px;
}

.reg-item { color: var(--text-dim); }
.reg-item span { color: var(--green); font-weight: bold; }

#debug-controls {
  display: flex;
  gap: 8px;
}

#debug-controls button {
  background: #222;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}
#debug-controls button:hover { border-color: var(--green-dim); }
#debug-controls button:disabled { opacity: 0.3; cursor: not-allowed; }

footer {
  text-align: center;
  padding: 20px;
  margin-top: 20px;
}

footer a {
  color: var(--text-dim);
  font-size: 11px;
  text-decoration: none;
}
footer a:hover { color: var(--green-dim); }

/* Responsive */
@media (max-width: 960px) {
  #main-area { flex-direction: column; align-items: center; }
  #screen { width: 100%; height: auto; }
  #crt-bezel { width: 100%; max-width: 680px; }
  #control-panel { width: 100%; }
}

@media (max-width: 600px) {
  #crt-bezel { padding: 10px; border-radius: 12px; }
  .kb-key { min-width: 24px; height: 24px; font-size: 7px; }
  .kb-key.wide { min-width: 40px; }
  .kb-key.wider { min-width: 52px; }
  .kb-key.space-key { min-width: 100px; }
}