@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500;600;700&family=Press+Start+2P&display=swap');

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

:root {
  --bg-deep: #050808;
  --bg-panel: #0a100e;
  --bg-panel-alt: #0c1210;
  --green: #33ff33;
  --green-dim: #1a7a1a;
  --green-dark: #0d3d0d;
  --green-glow: rgba(51, 255, 51, 0.15);
  --amber: #ffaa00;
  --amber-dim: #7a5500;
  --cyan: #00ffcc;
  --cyan-dim: #007a66;
  --red: #ff3333;
  --red-dim: #7a1a1a;
  --blue: #4488ff;
  --yellow: #ffdd44;
  --purple: #cc88ff;
  --white: #ccddcc;
  --border: #1a3a1a;
  --border-glow: rgba(51, 255, 51, 0.08);
  --font-mono: 'IBM Plex Mono', 'Fira Code', 'Courier New', monospace;
  --font-pixel: 'Press Start 2P', monospace;
}

html, body {
  background: var(--bg-deep);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.4;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Scanline overlay */
.scanline-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 9998;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.06) 2px,
    rgba(0, 0, 0, 0.06) 4px
  );
}

/* App container */
.app-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 8px;
  position: relative;
}

/* Header */
.app-header {
  text-align: center;
  padding: 16px 0 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.title-text {
  font-family: var(--font-pixel);
  font-size: 16px;
  color: var(--green);
  text-shadow: 0 0 10px var(--green-glow), 0 0 20px var(--green-glow);
  letter-spacing: 1px;
}

.title-6502 {
  color: var(--amber);
  animation: neonFlicker 4s infinite;
}

.title-emoji {
  font-family: sans-serif;
}

@keyframes neonFlicker {
  0%, 95%, 100% { opacity: 1; }
  96% { opacity: 0.8; }
  97% { opacity: 1; }
  98% { opacity: 0.6; }
  99% { opacity: 1; }
}

.subtitle {
  font-size: 11px;
  color: var(--green-dim);
  margin-top: 4px;
  font-style: italic;
}

/* NOP Sled Banner */
.nop-sled-banner {
  background: var(--bg-panel);
  border: 1px solid var(--amber);
  color: var(--amber);
  padding: 8px 16px;
  text-align: center;
  margin: 4px 0;
  border-radius: 4px;
  font-size: 12px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 5px rgba(255, 170, 0, 0.2); }
  50% { box-shadow: 0 0 15px rgba(255, 170, 0, 0.4); }
}

/* Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.toolbar-buttons {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.toolbar-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--green);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn:hover {
  background: var(--green-dark);
  border-color: var(--green-dim);
  box-shadow: 0 0 8px var(--green-glow);
}

.btn:active {
  transform: translateY(1px);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.5);
}

.btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.btn-sm {
  padding: 3px 8px;
  font-size: 10px;
}

.btn-active {
  background: var(--green-dark);
  border-color: var(--green);
  box-shadow: 0 0 10px var(--green-glow);
  color: var(--green);
}

.btn-run {
  color: var(--cyan);
  border-color: var(--cyan-dim);
}

.btn-run:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 8px rgba(0,255,204,0.2);
}

.btn-run.btn-active {
  background: rgba(0,255,204,0.1);
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn-reset {
  color: var(--amber);
  border-color: var(--amber-dim);
}

.btn-reset:hover {
  border-color: var(--amber);
  box-shadow: 0 0 8px rgba(255,170,0,0.2);
}

.btn-danger {
  color: var(--red);
  border-color: var(--red-dim);
}

.btn-danger:hover {
  border-color: var(--red);
  box-shadow: 0 0 8px rgba(255,51,51,0.2);
}

.btn-load {
  color: var(--cyan);
  border-color: var(--cyan-dim);
  padding: 6px 16px;
}

.btn-load:hover {
  background: rgba(0,255,204,0.08);
  border-color: var(--cyan);
}

/* Speed control */
.speed-control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: var(--amber);
}

.speed-slider {
  width: 80px;
  accent-color: var(--green);
  height: 4px;
}

.speed-value {
  min-width: 55px;
  text-align: right;
  color: var(--green);
  font-size: 10px;
}

/* Status badges */
.halted-badge {
  color: var(--red);
  font-weight: 700;
  font-size: 11px;
  animation: blink 1s infinite;
}

.running-badge {
  color: var(--cyan);
  font-weight: 700;
  font-size: 11px;
  animation: pulse 1s infinite;
}

.ready-badge {
  color: var(--green-dim);
  font-weight: 500;
  font-size: 11px;
}

@keyframes blink {
  0%, 50% { opacity: 1; } 51%, 100% { opacity: 0.3; }
}

/* Cycle counter (odometer) */
.cycle-counter {
  display: flex;
  align-items: center;
  gap: 6px;
}

.cycle-label {
  font-size: 9px;
  color: var(--amber-dim);
  letter-spacing: 1px;
}

.odometer {
  display: flex;
  gap: 1px;
}

.odo-digit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 20px;
  background: #0c0c0c;
  border: 1px solid #222;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  border-radius: 2px;
}

/* Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px;
  overflow: hidden;
}

.panel-title {
  font-size: 10px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.panel-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.panel-title-row .panel-title {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

/* Main content layout */
.main-content {
  display: grid;
  grid-template-columns: 240px 1fr 300px;
  gap: 8px;
  margin-bottom: 8px;
  min-height: 380px;
}

/* Register panel */
.register-panel {
  font-size: 12px;
}

.register-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.register-row {
  display: grid;
  grid-template-columns: 24px 60px 30px 1fr;
  gap: 6px;
  align-items: center;
  padding: 3px 4px;
  border-radius: 2px;
  transition: background 0.3s, color 0.3s;
}

.register-row.reg-changed {
  animation: regFlash 0.5s ease-out;
}

@keyframes regFlash {
  0% { background: rgba(255,255,255,0.15); color: #fff; }
  100% { background: transparent; }
}

.reg-label {
  font-weight: 700;
  color: var(--amber);
  font-size: 11px;
}

.reg-value {
  color: var(--green);
  font-weight: 600;
  text-shadow: 0 0 6px var(--green-glow);
}

.reg-dec {
  color: var(--green-dim);
  font-size: 10px;
}

.reg-bin {
  color: var(--green-dim);
  font-size: 9px;
  letter-spacing: 0.5px;
}

/* Status register / flags */
.status-register {
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

.status-label {
  font-size: 10px;
  color: var(--amber);
  margin-bottom: 6px;
  font-weight: 600;
}

.flag-row {
  display: flex;
  gap: 3px;
}

.flag-bit {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 26px;
  padding: 3px 0;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: all 0.2s;
}

.flag-set {
  background: var(--green-dark);
  border-color: var(--green-dim);
  box-shadow: 0 0 6px var(--green-glow);
}

.flag-set .flag-name { color: var(--green); }
.flag-set .flag-val { color: var(--green); }

.flag-clear .flag-name { color: #333; }
.flag-clear .flag-val { color: #333; }

.flag-unused { opacity: 0.3; }

.flag-name {
  font-size: 8px;
  font-weight: 700;
  line-height: 1;
}

.flag-val {
  font-size: 10px;
  font-weight: 600;
  line-height: 1;
  margin-top: 2px;
}

/* Memory panel */
.memory-panel {
  overflow: hidden;
}

.mem-toolbar {
  display: flex;
  gap: 4px;
  margin-bottom: 6px;
}

.mem-goto-input {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  color: var(--green);
  padding: 3px 6px;
  width: 70px;
}

.mem-goto-input:focus {
  outline: none;
  border-color: var(--green-dim);
  box-shadow: 0 0 5px var(--green-glow);
}

.mem-container {
  font-size: 11px;
  line-height: 1.5;
  overflow: hidden;
  user-select: none;
}

.mem-row {
  display: flex;
  gap: 4px;
  padding: 1px 4px;
  white-space: nowrap;
  border-left: 2px solid transparent;
}

.mem-row-pc {
  background: rgba(51, 255, 51, 0.06);
  border-left-color: var(--green);
}

.mem-row-stack {
  border-left-color: rgba(68, 136, 255, 0.3);
}

.mem-row-zp {
  border-left-color: rgba(255, 221, 68, 0.2);
}

.mem-row-vec {
  border-left-color: rgba(255, 51, 51, 0.3);
}

.mem-addr {
  color: var(--amber-dim);
  font-weight: 500;
  min-width: 52px;
}

.mem-bytes {
  display: inline-flex;
  gap: 4px;
  flex-wrap: nowrap;
}

.mem-byte {
  cursor: pointer;
  transition: color 0.15s;
  min-width: 16px;
  text-align: center;
}

.mem-byte:hover {
  color: var(--cyan);
  text-shadow: 0 0 6px rgba(0,255,204,0.3);
}

.mem-byte-pc {
  color: #fff;
  font-weight: 700;
  text-shadow: 0 0 8px var(--green-glow);
}

.mem-sep {
  display: inline-block;
  width: 4px;
}

.mem-ascii {
  color: var(--green-dim);
  font-size: 10px;
  margin-left: 4px;
}

.mem-edit-input {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--cyan-dim);
  border: 1px solid var(--cyan);
  color: #fff;
  padding: 0 2px;
  text-align: center;
}

/* Disassembly panel */
.disasm-panel {
  overflow: hidden;
}

.dis-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 9px;
}

.dis-legend .dis-load { color: var(--green); }
.dis-legend .dis-jump { color: var(--blue); }
.dis-legend .dis-arith { color: var(--yellow); }
.dis-legend .dis-shift { color: var(--red); }
.dis-legend .dis-misc { color: var(--white); }

.dis-container {
  overflow-y: auto;
  max-height: 340px;
}

.dis-line {
  display: flex;
  gap: 4px;
  padding: 1px 4px;
  cursor: pointer;
  transition: background 0.1s;
  font-size: 11px;
  white-space: nowrap;
}

.dis-line:hover {
  background: rgba(255,255,255,0.03);
}

.dis-current {
  background: rgba(51, 255, 51, 0.08);
  border-left: 2px solid var(--green);
}

.dis-past {
  opacity: 0.4;
}

.dis-bp { width: 10px; color: var(--red); font-size: 10px; }
.dis-bp-active { color: var(--red); text-shadow: 0 0 6px rgba(255,51,51,0.5); }

.dis-marker {
  width: 12px;
  color: var(--cyan);
  font-weight: 700;
}

.dis-addr {
  color: var(--amber-dim);
  min-width: 44px;
  font-weight: 500;
}

.dis-hex {
  color: var(--green-dim);
  min-width: 64px;
  font-size: 10px;
}

.dis-load .dis-inst { color: #44dd66; }
.dis-jump .dis-inst { color: var(--blue); }
.dis-arith .dis-inst { color: var(--yellow); }
.dis-shift .dis-inst { color: #ff6666; }
.dis-misc .dis-inst { color: var(--white); }

/* Bottom panels */
.bottom-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}

/* Loader */
.loader-panel .loader-controls {
  display: flex;
  gap: 6px;
  align-items: center;
}

.mode-toggle {
  display: flex;
  gap: 2px;
}

.select-input {
  font-family: var(--font-mono);
  font-size: 10px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  color: var(--green);
  padding: 3px 4px;
}

.code-input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  color: var(--green);
  padding: 8px;
  resize: vertical;
  min-height: 120px;
  line-height: 1.5;
}

.code-input:focus {
  outline: none;
  border-color: var(--green-dim);
  box-shadow: 0 0 8px var(--green-glow);
}

.loader-bottom {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.addr-input-row {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--amber);
}

.addr-input {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  color: var(--green);
  padding: 3px 6px;
  width: 56px;
}

.addr-input:focus {
  outline: none;
  border-color: var(--green-dim);
}

.load-error {
  color: var(--red);
  font-size: 10px;
}

/* Console */
.console-panel {
  min-height: 200px;
}

.console-output {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
  background: var(--bg-deep);
  border: 1px solid var(--border);
  padding: 8px;
  min-height: 140px;
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  text-shadow: 0 0 4px var(--green-glow);
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 12px;
  border-top: 1px solid var(--border);
  font-size: 10px;
  color: var(--green-dim);
}

.footer-link {
  color: var(--cyan);
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
  text-shadow: 0 0 8px rgba(0,255,204,0.3);
}

/* Toast notification animation */
@keyframes fadeInOut {
  0% { opacity: 0; transform: translateY(-10px); }
  15% { opacity: 1; transform: translateY(0); }
  85% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-10px); }
}

/* Mobile tabs */
.mobile-tabs {
  display: none;
  gap: 2px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
}

.mobile-tab {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--green-dim);
  background: transparent;
  border: 1px solid var(--border);
  padding: 6px 16px;
  cursor: pointer;
  flex: 1;
}

.mobile-tab-active {
  color: var(--green);
  background: var(--green-dark);
  border-color: var(--green-dim);
}

/* Scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--green-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--green-dim); }

/* Responsive */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 200px 1fr;
  }
  .col-disasm {
    grid-column: 1 / -1;
  }
  .bottom-panels {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-tabs {
    display: flex;
  }

  .main-content {
    display: block;
  }

  .main-col {
    display: none;
  }

  .main-col.mobile-visible {
    display: block;
    margin-bottom: 8px;
  }

  .bottom-panels {
    display: none;
    grid-template-columns: 1fr;
  }

  .bottom-panels.mobile-visible {
    display: grid;
  }

  .toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .toolbar-buttons {
    width: 100%;
    justify-content: space-between;
  }

  .toolbar-info {
    width: 100%;
    justify-content: space-between;
  }

  .title-text {
    font-size: 11px;
  }

  .app-container {
    padding: 4px;
  }

  .dis-container {
    max-height: 400px;
  }

  .mem-ascii {
    display: none;
  }
}

@media (max-width: 480px) {
  .btn {
    padding: 4px 8px;
    font-size: 10px;
  }

  .title-text {
    font-size: 9px;
  }

  .mem-bytes {
    font-size: 10px;
    gap: 2px;
  }

  .mem-addr {
    font-size: 10px;
  }
}