/* ===================================================
   TETRIS NEON - LumoArcadia
=================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #060610;
  --panel: #0d0d1a;
  --accent: #00f5ff;
  --accent-2: #ff2d78;
  --accent-3: #ffe600;
  --good: #39ff14;
  --text: #e8e8f8;
  --muted: #7070a0;
  --border: rgba(0, 245, 255, .18);
  --font-display: 'Orbitron', monospace;
  --font-body: 'Rajdhani', sans-serif;
}

html { font-size: 16px; }

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 10%, rgba(0,245,255,.10) 0%, transparent 38%),
    radial-gradient(circle at 85% 90%, rgba(255,45,120,.09) 0%, transparent 38%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: var(--font-display); cursor: pointer; }

/* -- Layout -- */
.game-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: .75rem 1rem;
  gap: .6rem;
}

/* -- Header -- */
.game-header {
  width: min(900px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.back-link, .neon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 245, 255, .4);
  color: var(--accent);
  background: transparent;
  border-radius: 6px;
  padding: .5rem .9rem;
  font-size: .62rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  transition: background .18s, color .18s, box-shadow .18s;
  white-space: nowrap;
}
.back-link:hover, .neon-btn:hover {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 20px rgba(0,245,255,.55);
}
.neon-btn.lg {
  min-height: 48px;
  padding: 0 2rem;
  font-size: .78rem;
  letter-spacing: .2em;
}

.game-title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 3.5vw, 1.55rem);
  letter-spacing: .14em;
  color: var(--accent);
  text-shadow: 0 0 18px rgba(0,245,255,.65);
}

/* -- Play area -- */
.play-area {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: .75rem;
  width: min(900px, 100%);
}

/* -- Side panels -- */
.side-panel {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  flex-shrink: 0;
  width: 128px;
}

.panel-block {
  background: rgba(13, 13, 26, .8);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 8px;
  padding: .55rem .75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .25rem;
}

.panel-label {
  display: block;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: .52rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.panel-value {
  display: block;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(0,245,255,.65);
  line-height: 1;
  transition: transform .1s;
}

.panel-value.accent-2 {
  color: var(--accent-2);
  text-shadow: 0 0 10px rgba(255,45,120,.65);
}

.combo-val {
  font-size: 1.4rem;
  color: var(--accent-3);
  text-shadow: 0 0 12px rgba(255,230,0,.7);
  transition: transform .12s;
}

.hold-hint {
  color: var(--muted);
  font-family: var(--font-display);
  font-size: .45rem;
  letter-spacing: .1em;
  text-align: center;
  margin-top: -.1rem;
}

#nextCanvas, #holdCanvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

/* -- Stage -- */
.stage-wrap {
  position: relative;
  flex-shrink: 0;
  /* width set via JS based on cell size */
  border: 1px solid rgba(0,245,255,.28);
  border-radius: 10px;
  overflow: hidden;
  background: rgba(4, 4, 16, .96);
  box-shadow:
    0 0 0 1px rgba(0,245,255,.05),
    0 0 40px rgba(0,245,255,.10),
    0 0 70px rgba(255,45,120,.08);
}

canvas#gameCanvas {
  display: block;
  touch-action: none;
}

/* -- Overlays -- */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(4, 4, 16, .92);
  backdrop-filter: blur(4px);
  text-align: center;
  z-index: 10;
}
.screen.hidden { display: none; }

.screen-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 7vw, 3.2rem);
  font-weight: 900;
  letter-spacing: .08em;
  color: #fff;
  text-shadow: 0 0 28px rgba(255,255,255,.22);
  line-height: 1.05;
}

.screen-accent {
  color: var(--accent);
  text-shadow: 0 0 22px rgba(0,245,255,.8);
}

.screen-sub {
  color: var(--muted);
  font-size: .9rem;
  font-family: var(--font-body);
  letter-spacing: .06em;
  line-height: 1.65;
  max-width: 340px;
}

/* Key hints grid */
.key-hints {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .4rem .75rem;
  margin-top: .25rem;
}

.key-row {
  display: flex;
  align-items: center;
  gap: .45rem;
}

kbd {
  font-family: var(--font-display);
  font-size: .56rem;
  letter-spacing: .06em;
  color: var(--accent);
  background: rgba(0,245,255,.08);
  border: 1px solid rgba(0,245,255,.3);
  border-radius: 4px;
  padding: .18rem .4rem;
  white-space: nowrap;
}

.key-row span {
  color: var(--muted);
  font-size: .78rem;
  font-weight: 600;
  white-space: nowrap;
}

/* -- Mobile controls -- */
.mobile-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

.touch-col {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.touch-btn {
  min-width: 54px;
  min-height: 44px;
  border: 1px solid rgba(0,245,255,.34);
  background: rgba(0,245,255,.07);
  color: var(--accent);
  border-radius: 8px;
  font-size: 1rem;
  touch-action: manipulation;
  user-select: none;
  transition: background .1s, box-shadow .1s;
}
.touch-btn:active {
  background: rgba(0,245,255,.22);
  box-shadow: 0 0 14px rgba(0,245,255,.4);
}

.drop-btn {
  color: var(--accent-3);
  border-color: rgba(255,230,0,.34);
  background: rgba(255,230,0,.07);
  font-size: .75rem;
  letter-spacing: .06em;
}
.drop-btn:active { background: rgba(255,230,0,.22); box-shadow: 0 0 14px rgba(255,230,0,.4); }

.hold-btn {
  color: var(--accent-2);
  border-color: rgba(255,45,120,.34);
  background: rgba(255,45,120,.07);
  font-size: .62rem;
  letter-spacing: .1em;
}
.hold-btn:active { background: rgba(255,45,120,.22); }

/* -- Bottom hint -- */
.controls-hint {
  color: var(--muted);
  font-family: var(--font-display);
  font-size: .52rem;
  letter-spacing: .12em;
  text-align: center;
}

/* -- Responsive -- */
@media (max-width: 720px) {
  .side-panel { width: 90px; }
  .panel-value { font-size: .9rem; }
  .combo-val { font-size: 1.1rem; }
}

@media (max-width: 560px) {
  .game-page { padding: .5rem; gap: .4rem; }
  .side-panel { display: none; }
  .play-area { gap: 0; }
  .game-header { width: 100%; }
  .game-title { font-size: 1rem; }
  .controls-hint { display: none; }
}