:root {
  --bg: #0a0a14;
  --bg-panel: #12121f;
  --neon-cyan: #00f0ff;
  --neon-pink: #ff2bd6;
  --neon-purple: #b026ff;
  --neon-yellow: #fff933;
  --border-soft: #24243a;
  --text-main: #e8e8ff;
  --text-dim: #7a7a9a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text-main);
  font-family: 'Segoe UI', 'Courier New', monospace;
  overflow-x: hidden;
  height: 100%;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

body {
  background:
    radial-gradient(circle at 20% 10%, rgba(176,38,255,0.12), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(0,240,255,0.10), transparent 40%),
    var(--bg);
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px;
}

/* ---------- TOPBAR ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  flex-wrap: wrap;
  gap: 8px;
}

.logo {
  font-size: 22px;
  letter-spacing: 3px;
  margin: 0;
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan), 0 0 18px rgba(0,240,255,0.5);
}
.logo span {
  color: var(--neon-pink);
  text-shadow: 0 0 8px var(--neon-pink), 0 0 18px rgba(255,43,214,0.5);
}

.topbar-actions { display: flex; gap: 8px; }

.icon-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  color: var(--text-main);
  font-size: 18px;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
  transition: box-shadow .15s, border-color .15s;
}
.icon-btn:active, .icon-btn:hover {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 10px rgba(0,240,255,0.35);
}
.icon-btn.muted { opacity: 0.4; }

/* ---------- LAYOUT ---------- */
.game-layout {
  display: grid;
  grid-template-columns: 150px auto 150px;
  gap: 16px;
  justify-content: center;
  align-items: start;
  flex: 1;
  padding: 10px 0;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 10px;
  text-align: center;
}

.panel-label {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.panel-value {
  font-size: 22px;
  font-weight: bold;
  color: var(--neon-yellow);
  text-shadow: 0 0 6px rgba(255,249,51,0.5);
}

.panel-box canvas {
  display: block;
  margin: 0 auto;
  background: #0d0d18;
  border-radius: 6px;
}

.mobile-info { display: none; }

/* ---------- BOARD ---------- */
.board-wrap {
  display: flex;
  justify-content: center;
}

.board-frame {
  position: relative;
  border: 2px solid var(--neon-purple);
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(176,38,255,0.35), inset 0 0 25px rgba(176,38,255,0.08);
  background: #08080f;
  overflow: hidden;
  line-height: 0;
}

#board, #fxCanvas {
  display: block;
  width: 300px;
  height: 600px;
}

#fxCanvas {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

/* ---------- OVERLAYS ---------- */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(6,6,14,0.88);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  padding: 20px;
}
.overlay.hidden { display: none; }

.overlay-title {
  font-size: 30px;
  letter-spacing: 3px;
  color: var(--neon-cyan);
  text-shadow: 0 0 10px var(--neon-cyan), 0 0 24px rgba(0,240,255,0.5);
}

.overlay-title.glitch {
  color: var(--neon-pink);
  text-shadow: 0 0 10px var(--neon-pink), 0 0 24px rgba(255,43,214,0.6);
  animation: glitchFlicker 1.4s infinite;
}

@keyframes glitchFlicker {
  0%, 92%, 100% { opacity: 1; transform: translate(0,0); }
  93% { opacity: 0.7; transform: translate(-2px,1px); }
  95% { opacity: 1; transform: translate(2px,-1px); }
  97% { opacity: 0.85; transform: translate(-1px,0); }
}

.overlay-sub {
  font-size: 14px;
  color: var(--text-dim);
}

.neon-btn {
  background: transparent;
  border: 2px solid var(--neon-cyan);
  color: var(--neon-cyan);
  padding: 10px 26px;
  font-size: 14px;
  letter-spacing: 2px;
  border-radius: 8px;
  cursor: pointer;
  text-shadow: 0 0 6px var(--neon-cyan);
  box-shadow: 0 0 10px rgba(0,240,255,0.3);
  transition: all .15s;
}
.neon-btn:active, .neon-btn:hover {
  background: rgba(0,240,255,0.12);
  box-shadow: 0 0 18px rgba(0,240,255,0.6);
}

/* ---------- LEVEL UP FX ---------- */
.level-flash {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: rgba(255,249,51,0.15);
  animation: levelFlash 0.5s ease-out;
}
@keyframes levelFlash {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* ---------- TOUCH CONTROLS ---------- */
.touch-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 14px 6px 6px;
  flex-wrap: wrap;
}

.tc-group {
  display: flex;
  gap: 10px;
}

.tc-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  color: var(--text-main);
  font-size: 20px;
  width: 58px;
  height: 58px;
  border-radius: 14px;
  cursor: pointer;
  touch-action: none;
  transition: background .1s, box-shadow .1s;
}
.tc-btn:active {
  background: rgba(0,240,255,0.15);
  box-shadow: 0 0 14px rgba(0,240,255,0.5);
}

.tc-hold, .tc-drop {
  font-size: 12px;
  letter-spacing: 1px;
  width: 68px;
}
.tc-drop {
  border-color: var(--neon-pink);
  color: var(--neon-pink);
}
.tc-hold {
  border-color: var(--neon-purple);
  color: var(--neon-purple);
}
.tc-rotate {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  font-size: 26px;
}

/* ---------- SCORE POPUP ---------- */
.score-popup {
  position: absolute;
  font-weight: bold;
  color: var(--neon-yellow);
  text-shadow: 0 0 8px rgba(255,249,51,0.7);
  pointer-events: none;
  animation: popupFloat 0.8s ease-out forwards;
  font-size: 16px;
}
@keyframes popupFloat {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-40px); }
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 720px) {
  .game-layout {
    grid-template-columns: 1fr;
    padding: 4px 0;
  }
  .side-panel { display: none; }
  .mobile-info {
    display: flex;
    justify-content: space-between;
    gap: 6px;
    order: 2;
    padding: 8px 2px;
  }
  .mini-box {
    background: var(--bg-panel);
    border: 1px solid var(--border-soft);
    border-radius: 8px;
    padding: 6px 4px;
    text-align: center;
    flex: 1;
    min-width: 0;
  }
  .mini-label {
    font-size: 9px;
    color: var(--text-dim);
    letter-spacing: 1px;
  }
  .mini-value {
    font-size: 15px;
    font-weight: bold;
    color: var(--neon-yellow);
  }
  .mini-box canvas {
    display: block;
    margin: 2px auto 0;
    background: #0d0d18;
    border-radius: 4px;
  }
  .board-wrap { order: 1; }
  #board, #fxCanvas {
    width: 90vw;
    max-width: 320px;
    height: calc(90vw * 2);
    max-height: 640px;
  }
  .logo { font-size: 17px; }
  .touch-controls {
    order: 3;
    justify-content: space-around;
  }
  .tc-btn { width: 52px; height: 52px; font-size: 18px; }
  .tc-hold, .tc-drop { width: 60px; }
}

@media (max-width: 380px) {
  .tc-btn { width: 46px; height: 46px; font-size: 16px; }
  .tc-hold, .tc-drop { width: 54px; font-size: 10px; }
}