:root {
  --bg-deep: #0a0a1a;
  --bg-panel: #12122a;
  --bg-input: #0d0d20;
  --border: #2a2a5a;
  --border-bright: #4040e0;
  --cyan: #40e0d0;
  --purple: #7b68ee;
  --blue: #4040e0;
  --green: #39ff14;
  --yellow: #ffe066;
  --red: #ff4444;
  --text: #d0d0e8;
  --text-dim: #6868a0;
  --white: #eeeeff;
}

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

body {
  background: var(--bg-deep);
  color: var(--text);
  font-family: 'VT323', monospace;
  overflow-x: hidden;
  min-height: 100vh;
}

/* CRT Scanline Overlay */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
}

#root { min-height: 100vh; display: flex; flex-direction: column; }

/* Scrollbar styling */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 0; }
::-webkit-scrollbar-thumb:hover { background: var(--border-bright); }

/* Animations */
@keyframes pulse-glow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
@keyframes flash-register {
  0% { background-color: rgba(64, 224, 208, 0.4); }
  100% { background-color: transparent; }
}
@keyframes flash-mem {
  0% { background-color: rgba(255, 224, 102, 0.5); }
  100% { background-color: transparent; }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}
@keyframes bootFlicker {
  0% { opacity: 0; }
  10% { opacity: 1; }
  12% { opacity: 0.3; }
  14% { opacity: 1; }
  100% { opacity: 1; }
}

.animate-blink { animation: blink 1s step-end infinite; }
.flash-reg { animation: flash-register 0.6s ease-out; }
.flash-mem { animation: flash-mem 1.2s ease-out; }
.boot-flicker { animation: bootFlicker 0.8s ease-out; }

/* Text glow for important values */
.glow-cyan { text-shadow: 0 0 8px rgba(64, 224, 208, 0.6); }
.glow-green { text-shadow: 0 0 8px rgba(57, 255, 20, 0.6); }
.glow-purple { text-shadow: 0 0 8px rgba(123, 104, 238, 0.6); }

/* Panel styling */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  position: relative;
}
.panel:hover { border-color: var(--border-bright); }
.panel-title {
  font-family: 'Press Start 2P', cursive;
  font-size: 10px;
  color: var(--cyan);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(64, 64, 224, 0.08);
}

/* Code editor textarea */
.code-editor {
  background: var(--bg-input);
  color: var(--green);
  font-family: 'Fira Code', monospace;
  font-size: 14px;
  line-height: 1.6;
  border: none;
  outline: none;
  resize: none;
  width: 100%;
  padding: 12px;
  tab-size: 8;
}
.code-editor::placeholder { color: var(--text-dim); }

/* Button styles */
.btn {
  font-family: 'VT323', monospace;
  font-size: 18px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(64, 224, 208, 0.08);
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(64, 224, 208, 0.1);
}
.btn-danger {
  border-color: var(--red);
  color: var(--red);
}
.btn-danger:hover {
  border-color: var(--red);
  color: #fff;
  background: rgba(255, 68, 68, 0.2);
}

/* Flag indicators */
.flag-on {
  background: rgba(57, 255, 20, 0.2);
  color: var(--green);
  border-color: var(--green);
  text-shadow: 0 0 6px rgba(57, 255, 20, 0.8);
}
.flag-off {
  background: rgba(40, 40, 80, 0.3);
  color: var(--text-dim);
  border-color: var(--border);
}

/* Memory hex view */
.mem-row { font-family: 'Fira Code', monospace; font-size: 13px; line-height: 1.5; }
.mem-addr { color: var(--purple); }
.mem-byte { color: var(--text); }
.mem-ascii { color: var(--text-dim); }
.mem-pc { background: rgba(64, 224, 208, 0.25); color: var(--cyan); }
.mem-sp { background: rgba(123, 104, 238, 0.2); }
.mem-io { background: rgba(255, 224, 102, 0.15); color: var(--yellow); }
.mem-write { animation: flash-mem 1.2s ease-out; }

/* Console output */
.console-output {
  font-family: 'Fira Code', monospace;
  font-size: 13px;
  background: var(--bg-input);
  color: var(--text);
  padding: 8px;
  overflow-y: auto;
  max-height: 120px;
}
.console-error { color: var(--red); }
.console-info { color: var(--cyan); }
.console-warn { color: var(--yellow); }

/* Mobile tab switcher */
.tab-btn {
  font-family: 'Press Start 2P', cursive;
  font-size: 9px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
}
.tab-btn.active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(64, 224, 208, 0.1);
}

/* Speed slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  height: 4px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  background: var(--cyan);
  cursor: pointer;
}

/* Easter egg boot screen */
.c64-boot {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #4040e0;
  z-index: 10000;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 40px;
  font-family: 'Press Start 2P', cursive;
  font-size: 14px;
  color: #a0a0ff;
  animation: bootFlicker 0.8s ease-out;
}

/* Tooltip */
.tooltip {
  position: absolute;
  background: #1a1a3a;
  border: 1px solid var(--cyan);
  padding: 8px 12px;
  font-size: 14px;
  color: var(--text);
  z-index: 1000;
  max-width: 320px;
  pointer-events: none;
  box-shadow: 0 0 12px rgba(64, 224, 208, 0.2);
}

/* Dropdown / Select */
select {
  font-family: 'VT323', monospace;
  font-size: 16px;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 8px;
  outline: none;
  cursor: pointer;
}
select:hover { border-color: var(--cyan); }
select option { background: var(--bg-panel); color: var(--text); }

input[type="text"], input[type="number"] {
  font-family: 'VT323', monospace;
  font-size: 16px;
  background: var(--bg-input);
  color: var(--cyan);
  border: 1px solid var(--border);
  padding: 4px 8px;
  outline: none;
}
input:focus { border-color: var(--cyan); }

@media (max-width: 900px) {
  .desktop-layout { display: none !important; }
  .mobile-layout { display: flex !important; }
}
@media (min-width: 901px) {
  .desktop-layout { display: flex !important; }
  .mobile-layout { display: none !important; }
}