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

:root {
  --bg: #0a0a0a;
  --bg-panel: #111;
  --bg-card: #181818;
  --border: #2a2a2a;
  --text: #bbb;
  --text-dim: #666;
  --green: #33ff33;
  --green-dim: #1a8a1a;
  --amber: #ffaa00;
  --red: #ff4444;
  --blue: #4488ff;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  min-height: 100vh;
  overflow-x: hidden;
}

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 16px;
}

header {
  text-align: center;
  padding: 10px 0 6px;
}

header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #eee;
  letter-spacing: 1px;
}

header .subtitle {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-weight: 300;
}

#main-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

/* CRT Monitor */
#crt-container {
  display: flex;
  justify-content: center;
  width: 100%;
}

#monitor-bezel {
  background: linear-gradient(145deg, #222 0%, #111 50%, #0a0a0a 100%);
  border-radius: 18px;
  padding: 20px 24px;
  border: 2px solid #2a2a2a;
  box-shadow:
    0 0 40px rgba(51, 255, 51, 0.05),
    inset 0 1px 0 rgba(255,255,255,0.05);
  position: relative;
}

#screen-wrapper {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
  box-shadow:
    0 0 30px rgba(51, 255, 51, 0.08),
    inset 0 0 60px rgba(0, 0, 0, 0.5);
}

#screen {
  display: block;
  width: 700px;
  height: 480px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: #000;
}

#scanlines {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.12) 2px,
    rgba(0, 0, 0, 0.12) 4px
  );
  pointer-events: none;
}

/* Controls */
#controls {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  align-items: center;
  padding: 4px 0;
}

.ctrl-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.ctrl-btn:hover {
  border-color: var(--green-dim);
  color: var(--green);
  background: #1a1a1a;
}

.ctrl-btn:active { transform: scale(0.97); }

.ctrl-btn.power {
  border-color: var(--green-dim);
  color: var(--green);
  font-weight: 700;
}

.ctrl-btn.active {
  border-color: var(--green-dim);
  color: var(--green);
}

.ctrl-btn.small {
  padding: 3px 8px;
  font-size: 0.65rem;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
}

.speed-control select {
  font-family: var(--mono);
  font-size: 0.7rem;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px;
}

/* Panels */
.panel {
  width: 100%;
  max-width: 760px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  max-height: 500px;
  overflow-y: auto;
}

.panel.hidden { display: none; }

.panel h2 {
  font-size: 0.9rem;
  color: var(--green);
  margin-bottom: 8px;
  font-weight: 500;
}

.panel h3 {
  font-size: 0.75rem;
  color: var(--amber);
  margin: 10px 0 6px;
  font-weight: 500;
}

.panel-hint {
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

/* ROM Slots */
.rom-slot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 6px;
  background: var(--bg-card);
  flex-wrap: wrap;
}

.rom-slot .rom-info {
  flex: 1;
  min-width: 200px;
}

.rom-slot .rom-label {
  font-size: 0.72rem;
  color: #ddd;
  font-weight: 500;
}

.rom-slot .rom-range {
  font-size: 0.6rem;
  color: var(--text-dim);
}

.rom-slot .rom-file-info {
  font-size: 0.6rem;
  color: var(--blue);
}

.rom-slot .rom-status {
  font-size: 1rem;
  min-width: 24px;
  text-align: center;
}

.rom-slot .rom-btn {
  font-family: var(--mono);
  font-size: 0.6rem;
  padding: 4px 10px;
  border: 1px dashed var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}

.rom-slot .rom-btn:hover {
  border-color: var(--green-dim);
  color: var(--green);
}

.rom-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.load-binary-section {
  border-top: 1px solid var(--border);
  margin-top: 12px;
  padding-top: 8px;
}

.binary-load-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
}

.binary-load-row input[type="text"] {
  width: 60px;
  font-family: var(--mono);
  font-size: 0.72rem;
  background: var(--bg-card);
  color: var(--green);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 6px;
  text-transform: uppercase;
}

/* Debug Panel */
.debug-section {
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #1a1a1a;
}

.register-grid {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.reg {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.reg-label {
  font-size: 0.6rem;
  color: var(--text-dim);
}

.reg-val {
  font-size: 0.85rem;
  color: var(--green);
  font-weight: 700;
}

.flags-row {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.flag {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-dim);
}

.flag.lit {
  background: var(--green-dim);
  color: var(--green);
  border-color: var(--green-dim);
}

.flag.dim { opacity: 0.3; }

.disasm-line {
  font-size: 0.8rem;
  color: var(--amber);
  padding: 4px 0;
}

.exec-info {
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* Memory Map */
.memmap {
  display: flex;
  height: 16px;
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.memmap-seg {
  height: 100%;
  cursor: pointer;
  transition: opacity 0.15s;
  position: relative;
}

.memmap-seg:hover { opacity: 0.7; }

/* Memory Viewer */
.mem-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 6px;
  font-size: 0.72rem;
}

.mem-nav input {
  width: 50px;
  font-family: var(--mono);
  font-size: 0.72rem;
  background: var(--bg-card);
  color: var(--green);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 5px;
  text-transform: uppercase;
}

.mem-viewer {
  font-size: 0.58rem;
  line-height: 1.5;
  color: var(--text-dim);
  max-height: 160px;
  overflow-y: auto;
  white-space: pre;
  background: #0a0a0a;
  padding: 6px;
  border-radius: 4px;
}

.bp-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
}

.bp-row input {
  width: 50px;
  font-family: var(--mono);
  font-size: 0.7rem;
  background: var(--bg-card);
  color: var(--green);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 5px;
  text-transform: uppercase;
}

#bp-status {
  color: var(--text-dim);
  font-size: 0.6rem;
}

/* Status Bar */
#status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 0.6rem;
  color: var(--text-dim);
  border-top: 1px solid #1a1a1a;
  margin-top: 8px;
  flex-wrap: wrap;
  gap: 8px;
}

#machine-status { color: var(--amber); }
#rom-cache-status { color: var(--green-dim); }
#keyboard-hint { color: var(--text-dim); }

footer {
  text-align: center;
  padding: 12px 0;
  font-size: 0.6rem;
  color: var(--text-dim);
  display: flex;
  justify-content: center;
  gap: 16px;
}

footer a {
  color: var(--green-dim);
  text-decoration: none;
}

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

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

/* Responsive */
@media (max-width: 780px) {
  #screen { width: 100%; height: auto; aspect-ratio: 280/192; }
  #monitor-bezel { padding: 12px; }
  .panel { max-height: 400px; }
}