:root {
  --bg: #060a14;
  --bg2: #0b1224;
  --panel: rgba(12, 20, 40, 0.72);
  --panel-border: rgba(0, 229, 255, 0.22);
  --cyan: #00e5ff;
  --cyan-dim: #00a8c4;
  --magenta: #ff2bd6;
  --amber: #ffc14a;
  --lime: #7cff6b;
  --danger: #ff4d6d;
  --text: #e8f1ff;
  --muted: #8aa0c0;
  --glow: 0 0 24px rgba(0, 229, 255, 0.35);
  --font-display: "Orbitron", system-ui, sans-serif;
  --font-ui: "Rajdhani", system-ui, sans-serif;
  --radius: 16px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  overflow: hidden;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#app {
  position: relative;
  width: 100%; height: 100%;
  display: grid; place-items: center;
}

#bg-fx {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(0, 229, 255, 0.12), transparent 55%),
    radial-gradient(ellipse 70% 50% at 85% 80%, rgba(255, 43, 214, 0.10), transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(80, 120, 255, 0.06), transparent 60%),
    linear-gradient(180deg, #060a14 0%, #0a1020 50%, #050810 100%);
}
#bg-fx::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  animation: gridDrift 40s linear infinite;
}
@keyframes gridDrift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 48px 48px, 48px 48px; }
}

.screen {
  position: relative; z-index: 1;
  display: none;
  width: min(1100px, 96vw);
  max-height: 96vh;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
}
.screen.active { display: flex; }

.logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.8rem, 10vw, 5.5rem);
  letter-spacing: 0.12em;
  margin: 1.5rem 0 0.2rem;
  text-shadow: 0 0 40px rgba(0, 229, 255, 0.55), 0 0 80px rgba(255, 43, 214, 0.25);
}
.logo span { color: var(--cyan); }
.tagline {
  color: var(--muted);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-size: 0.95rem;
  margin: 0 0 1.5rem;
}
.credit { color: var(--muted); margin-top: 1.5rem; font-size: 0.95rem; }

.title-glow {
  position: absolute; top: 8%; width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(0,229,255,0.25), transparent 70%);
  filter: blur(20px); pointer-events: none; z-index: -1;
}

.menu-stack { display: flex; flex-direction: column; gap: 0.7rem; width: min(320px, 90vw); }

.btn {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, rgba(20, 36, 64, 0.9), rgba(10, 18, 36, 0.95));
  color: var(--text);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.2s, border-color 0.2s, background 0.2s;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}
.btn:hover, .btn:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: var(--glow);
  outline: none;
}
.btn:active { transform: translateY(0); }
.btn.primary {
  background: linear-gradient(135deg, #00c8e0, #0077ff 55%, #c400a8);
  border: none;
  color: #041018;
  font-weight: 700;
  box-shadow: 0 0 28px rgba(0, 229, 255, 0.4);
}
.btn.primary:hover { box-shadow: 0 0 40px rgba(0, 229, 255, 0.65); }
.btn.danger { border-color: rgba(255,77,109,0.5); color: #ffb3c1; }
.btn.small { font-size: 0.75rem; padding: 0.55rem 0.9rem; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.back-btn {
  align-self: flex-start;
  background: transparent;
  border: none;
  color: var(--cyan);
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.4rem 0;
}
.back-btn:hover { text-shadow: 0 0 12px var(--cyan); }

h2 {
  font-family: var(--font-display);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 1.4rem;
  margin: 0.2rem 0 0.8rem;
  color: var(--cyan);
}

.panel {
  width: min(640px, 94vw);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  backdrop-filter: blur(16px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.howto ol { margin: 0; padding-left: 1.2rem; line-height: 1.7; font-size: 1.15rem; }
.howto .hint { margin-top: 1rem; color: var(--muted); }
.cyan { color: var(--cyan); }
.magenta { color: var(--magenta); }
kbd {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  padding: 0.1rem 0.4rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.8rem;
  width: min(720px, 94vw);
  max-height: 70vh;
  overflow: auto;
  padding: 0.25rem;
}
.level-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 1rem 0.8rem;
  text-align: center;
  cursor: pointer;
  transition: 0.15s ease;
}
.level-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--glow);
  transform: translateY(-2px);
}
.level-card.locked { opacity: 0.4; cursor: not-allowed; }
.level-card .n {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--cyan);
}
.level-card .meta { color: var(--muted); font-size: 0.9rem; margin-top: 0.35rem; }
.level-card .stars { color: var(--amber); letter-spacing: 0.15em; margin-top: 0.4rem; }

#score-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1.05rem;
  margin-bottom: 1rem;
}
#score-table th, #score-table td {
  padding: 0.45rem 0.35rem;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
#score-table th { color: var(--muted); font-weight: 600; letter-spacing: 0.08em; font-size: 0.85rem; }
#score-table tbody tr:nth-child(1) td { color: var(--amber); }
#score-table tbody tr:nth-child(2) td { color: #c0d0e8; }
#score-table tbody tr:nth-child(3) td { color: #cd7f32; }

.settings-panel .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 1.1rem;
}
.settings-panel input[type="range"] { width: 160px; accent-color: var(--cyan); }
.settings-panel input[type="checkbox"] { width: 1.2rem; height: 1.2rem; accent-color: var(--cyan); }
.settings-panel input[type="text"] {
  width: 140px;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.4rem 0.6rem;
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* GAME HUD */
#screen-game {
  width: 100%;
  max-width: 1280px;
  height: 100%;
  max-height: 100vh;
  padding: 0.6rem 0.8rem 1rem;
  gap: 0.6rem;
}
.hud {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.5rem;
}
.hud-left, .hud-right { display: flex; align-items: center; gap: 0.6rem; }
.hud-right { justify-content: flex-end; }
.hud-center { text-align: center; }
.stat {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 0.35rem 0.75rem;
  min-width: 72px;
  text-align: center;
}
.stat .label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-family: var(--font-display);
}
.stat span:last-child {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--cyan);
}
.stat.big span:last-child { font-size: 1.6rem; color: var(--amber); }

.icon-btn {
  width: 42px; height: 42px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
}
.icon-btn:hover { border-color: var(--cyan); box-shadow: var(--glow); }

.playfield-wrap {
  flex: 1;
  width: 100%;
  display: grid;
  grid-template-columns: 110px 1fr 150px;
  gap: 0.75rem;
  min-height: 0;
  align-items: stretch;
}
.queue-panel, .info-panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 0.75rem 0.5rem;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}
.queue-title {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}
#queue-canvas { width: 80px; max-height: 100%; }

.board-frame {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  background:
    linear-gradient(145deg, rgba(20,40,70,0.5), rgba(8,12,24,0.8));
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow:
    inset 0 0 60px rgba(0, 229, 255, 0.05),
    0 24px 60px rgba(0,0,0,0.5);
  overflow: hidden;
}
#game-canvas {
  max-width: 100%;
  max-height: calc(100vh - 110px);
  width: auto;
  height: auto;
  image-rendering: auto;
  border-radius: 12px;
  cursor: crosshair;
}

.toast {
  position: absolute;
  left: 50%; top: 18%;
  transform: translateX(-50%);
  background: rgba(6, 10, 20, 0.85);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-display);
  letter-spacing: 0.12em;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  pointer-events: none;
  animation: toastIn 0.25s ease;
}
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, -8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

.meter { width: 100%; }
.meter-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin-bottom: 0.35rem;
  text-align: center;
}
.meter-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
}
#pressure-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  box-shadow: 0 0 12px var(--cyan);
  transition: width 0.15s linear;
}
.tips {
  font-size: 0.95rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.35;
  flex: 1;
  display: flex;
  align-items: center;
}

.overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(2, 6, 14, 0.72);
  backdrop-filter: blur(8px);
  display: grid; place-items: center;
}
.overlay[hidden] { display: none !important; }
.overlay-card {
  width: min(420px, 92vw);
  background: linear-gradient(160deg, rgba(18,30,55,0.95), rgba(8,12,28,0.98));
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: 0 30px 80px rgba(0,0,0,0.55), var(--glow);
  animation: cardIn 0.28s ease;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.overlay-card h2 {
  margin-bottom: 0.6rem;
}
.overlay-card p {
  color: var(--muted);
  font-size: 1.15rem;
  margin: 0 0 1.25rem;
  line-height: 1.45;
}
.overlay-actions {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

@media (max-width: 860px) {
  .playfield-wrap {
    grid-template-columns: 72px 1fr;
    grid-template-rows: 1fr auto;
  }
  .info-panel {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
  }
  .tips { display: none; }
  #queue-canvas { width: 56px; height: 280px; }
}

@media (prefers-reduced-motion: reduce) {
  #bg-fx::before { animation: none; }
  .btn { transition: none; }
}

body.shake { animation: shake 0.35s ease; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(2px); }
}