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

:root {
  --bg-dark: #0d0d1a;
  --bg-panel: #1a1a2e;
  --bg-panel-border: #2a2a4a;
  --beige: #c4a882;
  --beige-dark: #a08060;
  --text: #e0d8cc;
  --text-dim: #8888aa;
  --accent-red: #cc4444;
  --accent-green: #44cc66;
  --accent-yellow: #cccc44;
  --commodore-blue: #42348b;
  --commodore-lblue: #7e70ca;
  --monitor-bezel: #2a2a2a;
  --monitor-inner: #1a1a1a;
  --kb-bg: #c8b494;
  --kb-key-bg: #d4c4a0;
  --kb-key-border: #a89878;
  --kb-key-active: #8b7355;
  --kb-key-text: #2a2015;
  --kb-func-bg: #a89070;
  --kb-special-bg: #baa888;
}

body {
  background: var(--bg-dark);
  color: var(--text);
  font-family: 'VT323', monospace;
  font-size: 18px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-user-select: none;
  user-select: none;
}

#app {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Rainbow stripe */
.rainbow-stripe {
  height: 6px;
  background: linear-gradient(90deg,
    #e44 0%, #e44 16.6%,
    #ea4 16.6%, #ea4 33.3%,
    #ee4 33.3%, #ee4 50%,
    #4c4 50%, #4c4 66.6%,
    #48e 66.6%, #48e 83.3%,
    #a4e 83.3%, #a4e 100%
  );
  border-radius: 3px 3px 0 0;
}

/* Header */
#header {
  background: var(--bg-panel);
  border: 1px solid var(--bg-panel-border);
  border-radius: 6px;
  margin: 16px 0;
  overflow: hidden;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.res-label {
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--text-dim);
  background: rgba(0,0,0,0.3);
  padding: 3px 10px;
  border-radius: 3px;
  border: 1px solid var(--bg-panel-border);
}

.commodore-c {
  font-family: 'Press Start 2P', monospace;
  font-size: 32px;
  color: var(--beige);
  background: var(--commodore-blue);
  padding: 8px 12px;
  border-radius: 6px;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.5);
}

h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: 20px;
  color: var(--beige);
  letter-spacing: 1px;
}

.subtitle {
  font-size: 16px;
  color: var(--text-dim);
  margin-top: 6px;
}

.led {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  flex-shrink: 0;
}

.led-yellow { background: var(--accent-yellow); box-shadow: 0 0 8px var(--accent-yellow); }
.led-green { background: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); }
.led-red { background: var(--accent-red); box-shadow: 0 0 8px var(--accent-red); }

/* Main layout */
#main {
  display: grid;
  grid-template-columns: 260px 1fr 220px;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 1400px) {
  #main {
    grid-template-columns: 1fr;
  }
}

/* Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--bg-panel-border);
  border-radius: 6px;
  padding: 16px;
}

.panel h2 {
  font-family: 'Press Start 2P', monospace;
  font-size: 11px;
  color: var(--beige);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.panel-hint {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

/* ROM slots */
.rom-slots {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.rom-slot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--bg-panel-border);
  border-radius: 4px;
  padding: 10px;
  gap: 8px;
}

.rom-slot.loaded {
  border-color: var(--accent-green);
  background: rgba(68, 204, 102, 0.05);
}

.rom-info {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.rom-info strong {
  font-size: 14px;
  display: block;
}

.rom-info small {
  font-size: 12px;
  color: var(--text-dim);
  word-break: break-all;
}

.rom-status {
  font-size: 18px;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

.rom-status.ok { color: var(--accent-green); }
.rom-status.fail { color: var(--accent-red); }

.rom-upload-btn {
  font-family: 'VT323', monospace;
  font-size: 14px;
  background: var(--beige-dark);
  color: #fff;
  border: none;
  border-radius: 3px;
  padding: 4px 10px;
  cursor: pointer;
  flex-shrink: 0;
  text-align: center;
}

.rom-upload-btn:hover {
  background: var(--beige);
  color: #000;
}

/* Power buttons */
.power-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-power, .btn-reset, .btn-poweroff {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  padding: 8px 12px;
  border: 2px solid;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-power {
  background: #1a3a1a;
  color: var(--accent-green);
  border-color: var(--accent-green);
}

.btn-power:disabled {
  background: #1a1a1a;
  color: #444;
  border-color: #444;
  cursor: not-allowed;
}

.btn-power:not(:disabled):hover {
  background: var(--accent-green);
  color: #000;
}

.btn-reset {
  background: #3a3a1a;
  color: var(--accent-yellow);
  border-color: var(--accent-yellow);
}

.btn-reset:disabled {
  background: #1a1a1a;
  color: #444;
  border-color: #444;
  cursor: not-allowed;
}

.btn-reset:not(:disabled):hover {
  background: var(--accent-yellow);
  color: #000;
}

.btn-poweroff {
  background: #3a1a1a;
  color: var(--accent-red);
  border-color: var(--accent-red);
}

.btn-poweroff:disabled {
  background: #1a1a1a;
  color: #444;
  border-color: #444;
  cursor: not-allowed;
}

.btn-poweroff:not(:disabled):hover {
  background: var(--accent-red);
  color: #000;
}

/* Monitor */
#monitor {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.monitor-bezel {
  background: var(--monitor-bezel);
  border-radius: 16px;
  padding: 24px;
  box-shadow:
    0 4px 20px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.05);
  max-width: 100%;
  transition: width 0.2s;
}

.monitor-screen-area {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  line-height: 0;
}

#canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  -ms-interpolation-mode: nearest-neighbor;
  display: block;
}

#canvas.mode-bordered {
  width: 1152px;
  height: 840px;
}

#canvas.mode-borderless {
  width: 792px;
  height: 552px;
}

@media (max-width: 1400px) {
  #canvas.mode-bordered,
  #canvas.mode-borderless {
    width: 100%;
    height: auto;
  }
}

.crt-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(0,0,0,0.10) 0px,
    rgba(0,0,0,0.10) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: multiply;
}

.crt-overlay.off {
  display: none;
}

.monitor-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 10px;
  gap: 16px;
}

.monitor-label {
  text-align: center;
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: #666;
  letter-spacing: 2px;
}

/* Controls panel */
.control-group {
  margin-bottom: 12px;
}

.control-group label {
  font-size: 13px;
  color: var(--text-dim);
  display: block;
  margin-bottom: 4px;
}

.control-group select, .control-group input[type="range"] {
  width: 100%;
  font-family: 'VT323', monospace;
  font-size: 16px;
  background: rgba(0,0,0,0.4);
  color: var(--text);
  border: 1px solid var(--bg-panel-border);
  border-radius: 3px;
  padding: 4px;
}

.sound-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn-small {
  font-family: 'VT323', monospace;
  font-size: 16px;
  background: rgba(0,0,0,0.4);
  color: var(--text);
  border: 1px solid var(--bg-panel-border);
  border-radius: 3px;
  padding: 4px 10px;
  cursor: pointer;
}

.btn-small:hover { border-color: var(--beige); }

.btn-toggle.active {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.btn-upload-label {
  display: inline-block;
}

.periph-status {
  font-size: 13px;
  color: var(--text-dim);
  display: block;
  margin-top: 4px;
}

/* Border toggle */
.border-toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-borders {
  min-width: 50px;
  text-align: center;
  font-weight: bold;
}

.btn-borders.active {
  border-color: var(--commodore-lblue);
  color: var(--commodore-lblue);
  background: rgba(66,52,139,0.2);
}

.border-res-info {
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--text-dim);
  background: rgba(0,0,0,0.3);
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid var(--bg-panel-border);
}

/* ============================================================
   ON-SCREEN KEYBOARD
   ============================================================ */
#keyboard-container {
  max-width: 900px;
  margin: 0 auto 16px auto;
  padding: 0 8px;
}

#vic20-keyboard {
  background: var(--kb-bg);
  border-radius: 10px;
  padding: 12px 10px;
  box-shadow:
    0 4px 16px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.3),
    inset 0 -2px 0 rgba(0,0,0,0.15);
  border: 2px solid #a89070;
}

.kb-row {
  display: flex;
  gap: 3px;
  margin-bottom: 3px;
  justify-content: center;
  align-items: stretch;
}

.kb-row:last-child {
  margin-bottom: 0;
}

.kb-key {
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  line-height: 1.3;
  color: var(--kb-key-text);
  background: var(--kb-key-bg);
  border: 1px solid var(--kb-key-border);
  border-bottom: 3px solid #8a7a5a;
  border-right: 2px solid #9a8a6a;
  border-radius: 4px;
  padding: 6px 5px;
  min-width: 38px;
  min-height: 34px;
  cursor: pointer;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.05s, border-bottom 0.05s, transform 0.05s;
  touch-action: manipulation;
  white-space: nowrap;
}

.kb-key:hover {
  background: #c8b488;
}

.kb-key.kb-active,
.kb-key:active {
  background: var(--kb-key-active) !important;
  color: #fff;
  border-bottom: 1px solid #6a5a3a;
  transform: translateY(2px);
}

/* Wide keys */
.kb-wide {
  min-width: 56px;
  padding: 6px 4px;
  font-size: 6px;
}

/* Return key */
.kb-return {
  min-width: 68px;
  background: #bfa878;
}

/* Shift keys */
.kb-shift {
  min-width: 52px;
}

/* Function keys */
.kb-func {
  background: var(--kb-func-bg);
  color: #1a1000;
  min-width: 36px;
  font-size: 7px;
  border-color: #8a7a5a;
  margin-left: 6px;
}

.kb-func:hover {
  background: #988060;
}

.kb-func.kb-active,
.kb-func:active {
  background: #6a5a3a !important;
  color: #fff;
}

/* Space bar */
.kb-space {
  flex: 1;
  max-width: 420px;
  min-width: 200px;
  min-height: 36px;
  font-size: 8px;
}

/* Cursor keys */
.kb-cursor {
  min-width: 44px;
  font-size: 6px;
}

/* Special keys */
.kb-special {
  background: var(--kb-special-bg);
  min-width: 52px;
  font-size: 6px;
  border-color: #9a8a6a;
}

.kb-special:hover {
  background: #a89878;
}

/* C= key */
.kb-cbm {
  background: #8a7a5a;
  color: #e8d8b8;
  font-size: 9px;
  font-weight: bold;
}

.kb-cbm:hover {
  background: #7a6a4a;
}

.kb-cbm.kb-active,
.kb-cbm:active {
  background: #5a4a2a !important;
  color: #fff;
}

/* Space row alignment */
.kb-row-space {
  justify-content: center;
  gap: 6px;
}

/* Responsive keyboard */
@media (max-width: 700px) {
  #vic20-keyboard {
    padding: 8px 4px;
  }
  .kb-key {
    font-size: 5px;
    min-width: 24px;
    min-height: 26px;
    padding: 3px 2px;
  }
  .kb-wide {
    min-width: 36px;
    font-size: 4.5px;
  }
  .kb-return {
    min-width: 44px;
  }
  .kb-func {
    min-width: 24px;
    margin-left: 3px;
  }
  .kb-space {
    min-width: 120px;
  }
  .kb-cursor {
    min-width: 28px;
    font-size: 4.5px;
  }
  .kb-row {
    gap: 2px;
    margin-bottom: 2px;
  }
}

@media (max-width: 480px) {
  .kb-key {
    font-size: 4px;
    min-width: 18px;
    min-height: 22px;
    padding: 2px 1px;
    border-radius: 3px;
  }
  .kb-wide {
    min-width: 26px;
    font-size: 3.5px;
  }
  .kb-return {
    min-width: 32px;
  }
  .kb-func {
    min-width: 18px;
    margin-left: 2px;
    font-size: 4px;
  }
  .kb-space {
    min-width: 80px;
    font-size: 5px;
  }
  .kb-cursor {
    min-width: 22px;
    font-size: 3.5px;
  }
}

/* Debug panel */
.debug-panel {
  margin-bottom: 16px;
}

.debug-panel.hidden {
  display: none;
}

.debug-regs {
  background: rgba(0,0,0,0.4);
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.debug-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 4px;
  font-size: 16px;
}

.debug-row code {
  color: var(--accent-green);
  font-family: 'VT323', monospace;
}

.debug-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.debug-mem {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.debug-mem input {
  font-family: 'VT323', monospace;
  font-size: 16px;
  width: 60px;
  background: rgba(0,0,0,0.4);
  color: var(--accent-green);
  border: 1px solid var(--bg-panel-border);
  border-radius: 3px;
  padding: 4px;
  text-transform: uppercase;
}

.debug-mem pre {
  width: 100%;
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--text-dim);
  background: rgba(0,0,0,0.4);
  padding: 8px;
  border-radius: 4px;
  overflow-x: auto;
  white-space: pre;
  margin-top: 8px;
}

/* Footer */
footer {
  text-align: center;
  padding: 16px;
  font-size: 14px;
  color: var(--text-dim);
  border-top: 1px solid var(--bg-panel-border);
  margin-bottom: 24px;
}

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

footer a:hover {
  text-decoration: underline;
}

footer p + p {
  margin-top: 6px;
}