:root{
  /* ui-ux-pro-max DS (Retro-Futurism): bg #0F0F23, primary #7C3AED, CTA #F43F5E */
  --bg:#0F0F23;
  --panel:#111B31;
  --panel2:#0C1428;
  --text:#E2E8F0;
  --muted:#A7B4CF;
  --line:#2A3560;

  --primary:#7C3AED;
  --primary2:#A78BFA;
  --cta:#F43F5E;

  --accent:#79FFA8;
  --danger:#FF5C7A;
  --warn:#FFD66E;
  --info:#78B7FF;

  --shadow: 0 22px 70px rgba(0,0,0,.50);
  --radius: 18px;
}
*{box-sizing:border-box}
html,body{height:100%}

/* ui-ux-pro-max DS: Retro-Futurism + Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background:
    radial-gradient(980px 640px at 18% 10%, rgba(124,58,237,.22) 0%, rgba(15,15,35,0) 55%),
    radial-gradient(920px 620px at 88% 14%, rgba(244,63,94,.14) 0%, rgba(15,15,35,0) 58%),
    radial-gradient(900px 620px at 50% 110%, rgba(167,139,250,.10) 0%, rgba(15,15,35,0) 60%),
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(0,0,0,0));
  background-color: var(--bg);
  color:var(--text);
}

.topbar{
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 22px;
  border-bottom:1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(10,14,22,.72), rgba(10,14,22,.44));
  backdrop-filter: blur(12px);
  position:sticky; top:0; z-index:20;
}
.brand{display:flex; align-items:center; gap:14px;}
.logo{
  width:44px; height:44px; border-radius:14px;
  display:grid; place-items:center;
  background: radial-gradient(18px 18px at 30% 30%, rgba(255,255,255,.18) 0%, rgba(255,255,255,0) 70%),
              linear-gradient(135deg, rgba(121,255,168,.28), rgba(120,183,255,.22));
  border:1px solid rgba(255,255,255,.14);
  box-shadow: 0 18px 70px rgba(0,0,0,.40);
  font-weight:900;
  letter-spacing:.6px;
}
.title{font-size:16px; font-weight:800; letter-spacing:.2px}
.subtitle{font-size:12px; color:var(--muted); margin-top:2px}
.muted{color:var(--muted)}
.small{font-size:12px}

.controls{display:flex; align-items:center; gap:10px; flex-wrap:wrap; justify-content:flex-end;}
button{
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  cursor:pointer;
  transition: transform .08s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
  box-shadow: 0 8px 26px rgba(0,0,0,.25);
}
button:hover{
  background: rgba(255,255,255,.10);
  border-color: rgba(255,255,255,.22);
  box-shadow: 0 12px 34px rgba(0,0,0,.28);
}
button:active{transform: translateY(1px)}
button.secondary{background: rgba(0,0,0,.18)}

.toggle{display:flex; align-items:center; gap:8px; font-size:12px; color:var(--muted)}
.toggle input{accent-color: var(--accent)}

.grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 16px;
  max-width: 1200px;
  margin: 0 auto;
}
.grid.one{
  grid-template-columns: 1fr;
  max-width: 980px;
}
@media (max-width: 980px){
  .grid{grid-template-columns:1fr}
}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important; animation:none !important}
}

.panel{
  background:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.panelHeader{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 14px;
  background: rgba(0,0,0,.18);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.panelHeader h2{margin:0; font-size:14px; letter-spacing:.4px}

.badge{
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(121,255,168,.10);
  color: var(--accent);
  font-weight: 900;
  letter-spacing:.9px;
  text-shadow: 0 1px 0 rgba(0,0,0,.35);
}
.badge.neutral{background: rgba(120,183,255,.12); color: var(--info)}
.badge.danger{background: rgba(255,92,122,.12); color: var(--danger)}
.badge.warn{background: rgba(255,214,110,.14); color: var(--warn)}

.hud{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 12px 14px;
}
@media (max-width: 520px){
  .hud{grid-template-columns: repeat(2,1fr)}
}
.hudItem{
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(0,0,0,.18));
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 16px;
  padding: 10px 10px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.03);
}
.hudItem .k{font-size:11px; color: var(--muted)}
.hudItem .v{font-size:18px; font-weight:900; margin-top:2px}

.canvasWrap{padding: 14px; display:grid; place-items:center; gap: 10px}

/* Dynamic Background System for Memory Challenge Mode */

/* Base canvas wrapper with animated background */
.canvasWrap {
  position: relative;
  overflow: hidden;
}

/* Light Mode Background - Cyberpunk Tech Grid */
.canvasWrap.light-mode::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    /* Animated gradient overlay */
    linear-gradient(135deg, 
      rgba(124, 58, 237, 0.3) 0%,
      rgba(120, 183, 255, 0.2) 50%,
      rgba(121, 255, 168, 0.1) 100%
    ),
    /* Tech grid pattern */
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 40px,
      rgba(124, 58, 237, 0.15) 40px,
      rgba(124, 58, 237, 0.15) 41px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 40px,
      rgba(120, 183, 255, 0.15) 40px,
      rgba(120, 183, 255, 0.15) 41px
    ),
    /* Base gradient */
    radial-gradient(ellipse at 30% 20%, rgba(124, 58, 237, 0.4) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(121, 255, 168, 0.3) 0%, transparent 50%),
    linear-gradient(180deg, #0a0a1a 0%, #1a0a2e 50%, #0a1a2e 100%);
  animation: lightModePulse 4s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

/* Dark Mode Background - Mysterious Abyss */
.canvasWrap.dark-mode::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    /* Subtle purple glow in center */
    radial-gradient(ellipse at 50% 50%, rgba(88, 28, 135, 0.3) 0%, transparent 60%),
    /* Distant stars/particles */
    radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(124, 58, 237, 0.4), transparent),
    radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(2px 2px at 130px 80px, rgba(120, 183, 255, 0.4), transparent),
    radial-gradient(1px 1px at 160px 20px, rgba(255, 255, 255, 0.6), transparent),
    /* Deep base gradient */
    linear-gradient(180deg, #050508 0%, #0a0810 30%, #0d0815 70%, #080510 100%);
  animation: darkModeBreath 6s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

/* Light Mode Animations */
@keyframes lightModePulse {
  0%, 100% {
    filter: brightness(1) saturate(1);
    transform: scale(1);
  }
  50% {
    filter: brightness(1.1) saturate(1.2);
    transform: scale(1.02);
  }
}

/* Dark Mode Animations */
@keyframes darkModeBreath {
  0%, 100% {
    opacity: 0.9;
    filter: brightness(0.9) contrast(1.1);
  }
  50% {
    opacity: 1;
    filter: brightness(1) contrast(1.2);
  }
}

/* Canvas glow effect based on visibility mode */
#gameCanvas {
  transition: box-shadow 0.5s ease;
}

.canvasWrap.light-mode #gameCanvas {
  box-shadow: 
    0 0 60px rgba(124, 58, 237, 0.4),
    0 0 100px rgba(120, 183, 255, 0.2),
    inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.canvasWrap.dark-mode #gameCanvas {
  box-shadow: 
    0 0 40px rgba(88, 28, 135, 0.3),
    0 0 80px rgba(0, 0, 0, 0.5),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* Retro scanline effect overlay */
.canvasWrap::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  z-index: 10;
  opacity: 0.5;
}

canvas{
  width: min(520px, 94vw);
  height: min(520px, 94vw);
  image-rendering: pixelated;
  border-radius: 16px;
  background: rgba(0,0,0,.14);
  border: 1px solid rgba(255,255,255,.14);
  box-shadow:
    0 22px 90px rgba(0,0,0,.46),
    0 0 0 1px rgba(124,58,237,.25),
    inset 0 0 0 1px rgba(255,255,255,.06);
  position: relative;
}
.hint{font-size:12px; color: var(--muted)}

.unit{font-size:12px; color: var(--muted); margin-left:6px; font-weight:600}
.vis-mode{font-weight:900; letter-spacing:.4px}
.vis-mode.visible{color: var(--accent)}
.vis-mode.dark{color: var(--cta)}

.visBarWrap{width:min(520px, 94vw); margin-top: 6px}
.visBarTrack{
  height: 10px;
  border-radius: 999px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.24);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.04);
}
.visBar{height:100%; width: 100%; border-radius: 999px}
.visHint{margin-top:8px; font-size:12px; color: var(--muted)}

.inbox,.outbox{padding: 0 14px 14px 14px}
.inboxHeader{display:flex; align-items:center; justify-content:space-between; gap:10px; margin: 8px 0 10px}
.inboxTitle{font-weight:800; font-size:12px}
.log{
  height: 180px;
  overflow:auto;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(0,0,0,.22), rgba(0,0,0,.34));
  border: 1px solid rgba(255,255,255,.10);
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  line-height: 1.55;
}
.log .item{padding: 6px 6px; border-bottom: 1px dashed rgba(255,255,255,.10)}
.log .item:last-child{border-bottom:none}
.log .t{color: var(--muted); margin-right:8px}
.log .ok{color: var(--accent)}
.log .bad{color: var(--danger)}
.log .hold{color: var(--warn)}

.compose{padding: 0 14px 14px 14px}
.row{display:flex; gap:10px}
input[type="text"]{
  flex:1;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.22);
  color: var(--text);
  outline:none;
}
input[type="text"]:focus{border-color: rgba(121,255,168,.35); box-shadow: 0 0 0 4px rgba(121,255,168,.10)}

.keypad{margin-top:10px}
.pad{
  margin-top:8px;
  display:grid;
  grid-template-columns: repeat(3, 44px);
  gap: 8px;
}
.padBtn{
  width:44px; height:44px;
  border-radius: 14px;
  font-weight: 900;
  background: rgba(0,0,0,.18);
}

.footer{max-width: 1200px; margin: 0 auto; padding: 12px 16px 18px}

/* Music Controls - 音乐控制面板 */
.music-controls {
  margin-top: 16px;
  padding: 16px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(0, 0, 0, 0.2) 100%);
  border-radius: 16px;
  border: 1px solid rgba(124, 58, 237, 0.2);
}

.music-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.music-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.music-mode {
  font-size: 11px;
  padding: 4px 8px;
  background: rgba(124, 58, 237, 0.2);
  border-radius: 12px;
  color: var(--primary2);
}

.music-buttons {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.music-btn {
  flex: 1;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(124, 58, 237, 0.2);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
}

.music-btn:hover {
  background: rgba(124, 58, 237, 0.35);
  border-color: rgba(124, 58, 237, 0.5);
}

.music-btn.secondary {
  flex: 0.5;
  background: rgba(0, 0, 0, 0.2);
}

.music-btn.secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 10px;
}

.volume-icon {
  font-size: 14px;
  opacity: 0.8;
}

.volume-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(124, 58, 237, 0.5);
  transition: transform 0.1s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(124, 58, 237, 0.5);
}

.volume-value {
  font-size: 12px;
  color: var(--muted);
  min-width: 36px;
  text-align: right;
}

.music-status {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(124, 58, 237, 0.1);
  border-radius: 8px;
  font-size: 12px;
  color: var(--primary2);
  text-align: center;
  border: 1px solid rgba(124, 58, 237, 0.15);
}