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

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

:root {
  --bg: #0a0a0e;
  --panel-bg: #0e0e18;
  --panel-border: #1a2a4a;
  --text: #00FF41;
  --text-dim: #007722;
  --text-bright: #44FF77;
  --accent: #00FFFF;
  --red: #FF4444;
  --yellow: #FFFF00;
  --amber: #FFB000;
  --btn-bg: #151528;
  --btn-border: #2a2a5a;
  --input-bg: #0a0a14;
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
}

body { background: var(--bg); color: var(--text); font-size: 13px; line-height: 1.4; overflow-x: hidden; min-height: 100vh; }

.scanlines { 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(0,0,0,0.06) 2px, rgba(0,0,0,0.06) 4px); }

.app-container { display: flex; flex-direction: column; min-height: 100vh; max-width: 1600px; margin: 0 auto; padding: 8px; }

.app-header { display: flex; justify-content: space-between; align-items: center; padding: 8px 16px; border: 1px solid var(--panel-border); background: var(--panel-bg); margin-bottom: 8px; flex-wrap: wrap; gap: 8px; }
.header-title { font-size: 18px; font-weight: 700; text-shadow: 0 0 10px var(--text), 0 0 20px rgba(0,255,65,0.3); letter-spacing: 1px; }
.chip-icon { color: var(--amber); text-shadow: 0 0 8px var(--amber); }
.header-sub { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
.header-right { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.status-indicator { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; animation: pulse 1.5s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.status-text { font-weight: 600; font-size: 12px; }
.cycle-counter { color: var(--text-dim); font-size: 12px; }
.error-msg { color: var(--red); font-size: 11px; max-width: 300px; }

.panel { background: var(--panel-bg); border: 1px solid var(--panel-border); padding: 6px; overflow: hidden; }
.panel-title { font-size: 11px; font-weight: 600; color: var(--accent); margin-bottom: 6px; text-shadow: 0 0 6px rgba(0,255,255,0.3); white-space: nowrap; letter-spacing: 1px; }
.panel-title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }

/* CGA Display Area */
.cga-row { display: grid; grid-template-columns: 1fr 300px; gap: 8px; margin-bottom: 8px; }

@media (max-width: 1000px) {
  .cga-row { grid-template-columns: 1fr; }
}

.cga-side-panels { display: flex; flex-direction: column; gap: 8px; }

.cga-panel { display: flex; flex-direction: column; }
.cga-display-wrapper {
  background: #000;
  border: 2px solid #222;
  border-radius: 6px;
  padding: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: inset 0 0 40px rgba(0,255,65,0.05), 0 0 15px rgba(0,0,0,0.5);
}

.cga-canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: 100%;
  max-width: 640px;
  height: auto;
  aspect-ratio: 640/200;
  background: #000;
  border-radius: 2px;
}

.cga-info { font-size: 10px; color: var(--text-dim); margin-top: 4px; text-align: center; }

/* Floppy Panel */
.floppy-panel { font-size: 11px; }
.floppy-status { display: flex; align-items: center; gap: 4px; margin-bottom: 4px; }
.floppy-icon { font-size: 16px; }
.floppy-inserted { color: var(--text-bright); }
.floppy-empty { color: var(--text-dim); }
.floppy-motor { color: var(--amber); font-size: 10px; animation: pulse 0.5s infinite; }
.floppy-controls { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 4px; }
.floppy-geometry { font-size: 10px; color: var(--text-dim); }

/* Main Layout */
.main-layout { display: grid; grid-template-columns: 190px 1fr 200px; gap: 8px; flex: 1; min-height: 0; overflow: hidden; }

@media (max-width: 900px) {
  .main-layout { grid-template-columns: 1fr; grid-template-rows: auto auto auto; }
}

.center-column { display: flex; flex-direction: column; gap: 8px; min-height: 0; overflow: hidden; }
.right-column { display: flex; flex-direction: column; gap: 8px; min-height: 0; overflow: hidden; }

/* Register Panel */
.register-panel { overflow-y: auto; font-size: 12px; }
.reg-section { margin-bottom: 4px; }
.reg-section-title { font-size: 10px; color: var(--text-dim); margin: 3px 0 1px; text-align: center; }
.reg-row { display: flex; justify-content: space-between; align-items: center; padding: 1px 4px; cursor: pointer; border-radius: 2px; transition: background 0.15s; }
.reg-row:hover { background: rgba(0,255,65,0.08); }
.reg-changed { animation: regFlash 0.6s ease-out; }
@keyframes regFlash { 0% { background: rgba(255,255,0,0.3); } 100% { background: transparent; } }
.reg-label { color: var(--amber); font-weight: 600; width: 28px; }
.reg-val { color: var(--text-bright); font-weight: 500; }
.reg-hi, .reg-lo { color: var(--text-bright); }
.reg-sep { color: var(--text-dim); margin: 0 1px; }
.reg-edit { background: var(--input-bg); border: 1px solid var(--accent); color: var(--text-bright); font-family: inherit; font-size: 12px; width: 50px; padding: 1px 3px; text-align: right; }
.phys-addr { font-size: 10px; color: var(--text-dim); text-align: center; padding: 2px; }

.flags-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
.flag-item { text-align: center; padding: 2px; cursor: pointer; border: 1px solid #1a1a2e; border-radius: 2px; transition: all 0.15s; }
.flag-item:hover { border-color: var(--text-dim); }
.flag-set { background: rgba(0,255,65,0.15); border-color: var(--text); }
.flag-name { font-size: 9px; color: var(--amber); }
.flag-val { font-size: 11px; font-weight: 700; }
.flag-set .flag-val { color: var(--text-bright); text-shadow: 0 0 4px var(--text); }

/* Disassembly */
.disasm-panel { flex: 1; min-height: 150px; display: flex; flex-direction: column; }
.disasm-list { flex: 1; overflow-y: auto; font-size: 12px; }
.disasm-line { display: flex; align-items: center; padding: 1px 4px; cursor: pointer; white-space: nowrap; border-left: 3px solid transparent; }
.disasm-line:hover { background: rgba(0,255,255,0.05); }
.disasm-current { background: rgba(0,255,255,0.1) !important; border-left-color: var(--accent); }
.disasm-bp { background: rgba(255,68,68,0.1); }
.disasm-bp-dot { color: var(--red); width: 12px; font-size: 10px; }
.disasm-arrow { color: var(--accent); width: 12px; font-weight: bold; }
.disasm-addr { color: var(--text-dim); width: 85px; font-size: 11px; }
.disasm-bytes { color: #555588; width: 95px; font-size: 11px; }
.disasm-mnemonic { color: var(--text-bright); font-weight: 500; }

/* Memory */
.memory-panel { display: flex; flex-direction: column; }
.mem-nav { display: flex; gap: 4px; margin-bottom: 4px; flex-wrap: wrap; }
.mem-input { background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text); font-family: inherit; font-size: 12px; padding: 3px 6px; width: 90px; }
.mem-view { font-size: 11px; overflow-x: auto; }
.mem-row { display: flex; gap: 8px; padding: 1px 0; white-space: nowrap; }
.mem-addr { color: var(--text-dim); width: 50px; }
.mem-bytes { display: flex; gap: 4px; }
.mem-byte { color: var(--text); }
.mem-read { color: #4488FF; }
.mem-write { color: var(--red); }
.mem-ascii { color: #556655; margin-left: 4px; }

/* Stack */
.stack-panel { min-height: 100px; }
.stack-list { font-size: 12px; }
.stack-entry { display: flex; gap: 8px; padding: 2px 4px; }
.stack-top { background: rgba(0,255,255,0.08); border-left: 2px solid var(--accent); }
.stack-addr { color: var(--text-dim); width: 75px; font-size: 11px; }
.stack-val { color: var(--text-bright); font-weight: 500; }
.stack-sp { color: var(--accent); font-size: 10px; }

/* Console */
.console-panel { min-height: 80px; display: flex; flex-direction: column; flex: 1; }
.console-output { flex: 1; background: #000; color: var(--text); padding: 6px; font-size: 12px; overflow-y: auto; border: 1px solid #0a1a0a; white-space: pre-wrap; word-break: break-all; min-height: 50px; text-shadow: 0 0 4px rgba(0,255,65,0.4); }

/* Controls */
.controls-bar { display: flex; gap: 8px; padding: 8px 0; align-items: flex-start; flex-wrap: wrap; }
.control-buttons { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.btn-ctrl { background: var(--btn-bg); border: 1px solid var(--btn-border); color: var(--text); font-family: inherit; font-size: 12px; padding: 6px 14px; cursor: pointer; transition: all 0.15s; font-weight: 600; }
.btn-ctrl:hover { background: rgba(0,255,65,0.1); border-color: var(--text); text-shadow: 0 0 6px var(--text); }
.btn-run { color: var(--accent); border-color: rgba(0,255,255,0.3); }
.btn-run:hover { border-color: var(--accent); }
.btn-reset { color: var(--amber); border-color: rgba(255,176,0,0.3); }
.btn-reset:hover { border-color: var(--amber); }
.btn-sm { background: var(--btn-bg); border: 1px solid var(--btn-border); color: var(--text-dim); font-family: inherit; font-size: 10px; padding: 2px 6px; cursor: pointer; }
.btn-sm:hover { color: var(--text); border-color: var(--text-dim); }
.speed-control { display: flex; align-items: center; gap: 6px; }
.speed-label { color: var(--text-dim); font-size: 11px; }
.speed-slider { width: 100px; accent-color: var(--text); }
.speed-val { color: var(--text-dim); font-size: 10px; min-width: 70px; }

/* Loader */
.loader-panel { flex: 1; min-width: 280px; }
.loader-row { display: flex; gap: 6px; align-items: center; margin-bottom: 4px; }
.example-select { background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text); font-family: inherit; font-size: 11px; padding: 4px; flex: 1; max-width: 360px; }
.hex-input { background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text-bright); font-family: inherit; font-size: 12px; padding: 6px; width: 100%; resize: vertical; }
.hex-input:focus, .mem-input:focus, .reg-edit:focus, .addr-input:focus, .example-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 4px rgba(0,255,255,0.2); }
.loader-label { color: var(--text-dim); font-size: 11px; }
.addr-input { background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text); font-family: inherit; font-size: 12px; padding: 3px 6px; width: 80px; }
.btn-load { background: rgba(0,255,65,0.1); border: 1px solid var(--text); color: var(--text-bright); font-family: inherit; font-size: 12px; font-weight: 600; padding: 4px 12px; cursor: pointer; }
.btn-load:hover { background: rgba(0,255,65,0.2); text-shadow: 0 0 6px var(--text); }

/* Footer */
.app-footer { text-align: center; padding: 12px; font-size: 11px; }
.app-footer a { color: var(--text-dim); text-decoration: none; }
.app-footer a:hover { color: var(--text); text-shadow: 0 0 6px var(--text); }

/* Scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }
option { background: var(--panel-bg); color: var(--text); }