:root {
  --bg: #020810;
  --panel: #050f1e;
  --border: #0a3a5c;
  --glow: #00d4ff;
  --glow2: #ff003c;
  --accent: #00ff9f;
  --warn: #ffaa00;
  --text: #c8e8ff;
  --muted: #4a7a99;
  --font-mono: 'Share Tech Mono', monospace;
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Exo 2', sans-serif;
}

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

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

/* Scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,212,255,0.015) 2px, rgba(0,212,255,0.015) 4px);
  pointer-events: none;
  z-index: 9999;
}

/* Animated grid background */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: gridMove 20s linear infinite;
  pointer-events: none;
  z-index: 0;
}
@keyframes gridMove {
  0% { transform: translateY(0); }
  100% { transform: translateY(40px); }
}

/* Screens */
.screen { display: none; position: relative; z-index: 1; }
.screen.active { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }

/* ASCII Logo */
.ascii-logo {
  font-family: var(--font-mono);
  font-size: clamp(7px, 1.2vw, 13px);
  color: var(--glow);
  text-shadow: 0 0 10px var(--glow);
  white-space: pre;
  line-height: 1.2;
  animation: flicker 5s infinite;
  margin-bottom: 30px;
}
@keyframes flicker {
  0%,100% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.6; }
  94% { opacity: 1; }
  96% { opacity: 0.8; }
  97% { opacity: 1; }
}

/* Panel */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 36px;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 0 40px rgba(0,212,255,0.08), inset 0 0 20px rgba(0,0,0,0.5);
  position: relative;
}
.panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--glow), transparent);
}
.panel-wide { max-width: 700px; }

h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 3px;
  color: var(--glow);
  text-transform: uppercase;
  margin-bottom: 24px;
  text-shadow: 0 0 15px var(--glow);
}

label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 6px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

input[type="text"], input[type="password"], input[type="number"] {
  width: 100%;
  background: rgba(0,212,255,0.04);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 10px 14px;
  margin-bottom: 18px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus {
  border-color: var(--glow);
  box-shadow: 0 0 12px rgba(0,212,255,0.25);
}

/* Buttons */
.btn {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--glow);
  color: var(--glow);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 2px;
  padding: 12px 28px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glow);
  transform: translateX(-100%);
  transition: transform 0.2s;
  opacity: 0.1;
}
.btn:hover::before { transform: translateX(0); }
.btn:hover { box-shadow: 0 0 20px rgba(0,212,255,0.4); text-shadow: 0 0 10px var(--glow); }
.btn:active { transform: scale(0.97); }

.btn-danger { border-color: var(--glow2); color: var(--glow2); }
.btn-danger::before { background: var(--glow2); }
.btn-danger:hover { box-shadow: 0 0 20px rgba(255,0,60,0.4); }

.btn-accent { border-color: var(--accent); color: var(--accent); }
.btn-accent::before { background: var(--accent); }
.btn-accent:hover { box-shadow: 0 0 20px rgba(0,255,159,0.4); }

.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* Messages */
.msg {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 10px 14px;
  border-radius: 2px;
  margin-bottom: 16px;
}
.msg-err { background: rgba(255,0,60,0.1); border: 1px solid rgba(255,0,60,0.4); color: var(--glow2); }
.msg-ok  { background: rgba(0,255,159,0.07); border: 1px solid rgba(0,255,159,0.3); color: var(--accent); }
.msg-warn { background: rgba(255,170,0,0.07); border: 1px solid rgba(255,170,0,0.3); color: var(--warn); }

/* HUD */
.hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 700px;
  padding: 12px 20px;
  background: rgba(5,15,30,0.9);
  border: 1px solid var(--border);
  border-radius: 2px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.hud-user { color: var(--glow); }
.hud-level { color: var(--accent); }
.lives { display: flex; gap: 6px; align-items: center; }
.heart { font-size: 1.1rem; transition: all 0.3s; }
.heart.lost { opacity: 0.2; filter: grayscale(1); }

/* Level map */
.level-map {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 20px 0;
}
.level-node {
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 14px 8px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  position: relative;
  transition: all 0.3s;
}
.level-node.done {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,255,159,0.05);
  box-shadow: 0 0 10px rgba(0,255,159,0.15);
}
.level-node.current {
  border-color: var(--glow);
  color: var(--glow);
  background: rgba(0,212,255,0.08);
  box-shadow: 0 0 15px rgba(0,212,255,0.25);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { box-shadow: 0 0 15px rgba(0,212,255,0.25); }
  50%      { box-shadow: 0 0 25px rgba(0,212,255,0.5); }
}
.level-node .node-icon { font-size: 1.4rem; display: block; margin-bottom: 6px; }
.level-node .node-name { display: block; font-size: 0.65rem; letter-spacing: 1px; }

/* Number guess */
.clue-display {
  font-family: var(--font-display);
  font-size: 2rem;
  text-align: center;
  padding: 20px;
  margin: 16px 0;
  border: 1px solid var(--border);
  letter-spacing: 4px;
}
.guess-count {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
  margin-bottom: 12px;
}
.hint-display {
  text-align: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  padding: 16px;
  margin: 12px 0;
  border: 1px solid var(--border);
  min-height: 60px;
  letter-spacing: 2px;
  transition: all 0.4s;
}

/* Word game */
.jumbled-word {
  font-family: var(--font-display);
  font-size: 2.5rem;
  text-align: center;
  letter-spacing: 8px;
  color: var(--glow);
  text-shadow: 0 0 20px var(--glow);
  padding: 20px;
  margin: 16px 0;
}
.word-hint {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 16px;
}

/* Game 24 */
.numbers-24 {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin: 20px 0;
}
.num-chip {
  background: rgba(0,212,255,0.08);
  border: 1px solid var(--glow);
  color: var(--glow);
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 900;
  width: 60px; height: 60px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 2px;
  text-shadow: 0 0 10px var(--glow);
  box-shadow: 0 0 12px rgba(0,212,255,0.2);
}
.target-24 {
  text-align: center;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  color: var(--warn);
  text-shadow: 0 0 20px var(--warn);
  margin: 10px 0;
}
.formula-input { font-size: 1.2rem; text-align: center; letter-spacing: 2px; }
.op-btns { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin: 12px 0; }
.op-btn {
  background: rgba(0,212,255,0.06);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  width: 44px; height: 44px;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
}
.op-btn:hover { border-color: var(--glow); color: var(--glow); }
.op-btn.num-op {
  border-color: rgba(0,212,255,0.3);
  color: var(--glow);
  font-weight: bold;
  font-size: 1.2rem;
}
.op-btn.num-op.used { opacity: 0.3; }

/* Cat finder */
.cat-grid { display: inline-grid; gap: 4px; margin: 16px auto; }
.cat-cell {
  width: 52px; height: 52px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.2s;
  font-family: var(--font-mono);
  color: var(--muted);
  background: rgba(0,0,0,0.3);
  user-select: none;
}
.cat-cell:hover:not(.revealed):not(.correct):not(.wrong) { border-color: var(--glow); color: var(--glow); }
.cat-cell.correct { border-color: var(--accent); background: rgba(0,255,159,0.12); }
.cat-cell.wrong   { border-color: var(--glow2);  background: rgba(255,0,60,0.12); }
.cat-cell.cat-show { font-size: 1.5rem; background: rgba(0,212,255,0.06); }
.memorize-bar {
  width: 100%; height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin: 12px 0;
  overflow: hidden;
}
.memorize-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--glow), var(--accent));
  transition: width 1s linear;
}
.cat-grid-wrap { text-align: center; }

/* Countdown overlay */
.countdown-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(2,8,16,0.92);
  z-index: 500;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.countdown-overlay.show { display: flex; }
.countdown-num {
  font-family: var(--font-display);
  font-size: 8rem;
  font-weight: 900;
  color: var(--glow2);
  text-shadow: 0 0 60px var(--glow2);
  animation: countPulse 1s ease-out;
}
@keyframes countPulse {
  0%   { transform: scale(1.5); opacity: 0; }
  100% { transform: scale(1);   opacity: 1; }
}

/* Result / Victory */
.big-msg {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 3rem);
  font-weight: 900;
  text-align: center;
  letter-spacing: 4px;
  margin-bottom: 20px;
}
.big-msg.win  { color: var(--accent); text-shadow: 0 0 40px var(--accent); }
.big-msg.lose { color: var(--glow2);  text-shadow: 0 0 40px var(--glow2);  }

/* Misc */
.notif {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
  padding: 8px;
  letter-spacing: 1px;
}
.sub-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 6px;
}
hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

/* Glitch animation */
.glitch { position: relative; animation: glitch 3s infinite; }
@keyframes glitch {
  0%,94%,100% { clip-path: none; transform: none; }
  95% { clip-path: polygon(0 10%, 100% 10%, 100% 40%, 0 40%); transform: translate(-3px, 0); }
  96% { clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%); transform: translate(3px, 0); }
  97% { clip-path: none; transform: none; }
}

/* Loading screen */
#screen-loading { justify-content: center; }
.loading-bar-wrap { width: 300px; margin: 24px 0; }
.loading-bar {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.loading-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--glow), var(--accent));
  width: 0;
  animation: loadFill 1.8s ease-out forwards;
}
@keyframes loadFill { 0% { width: 0; } 70% { width: 85%; } 100% { width: 100%; } }
.loading-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 10px;
  letter-spacing: 2px;
  animation: blink 1.2s step-end infinite;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* Responsive */
@media (max-width: 600px) {
  .level-map { grid-template-columns: repeat(2, 1fr); }
  .num-chip { width: 48px; height: 48px; font-size: 1.3rem; }
}