@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;900&family=Rajdhani:wght@400;500;600&display=swap');

:root {
  --bg-deep: #05070f;
  --bg-panel: #0c1120;
  --line: #1e2740;
  --teal: #00ffc8;
  --teal-dim: #0a8f6e;
  --violet: #7f5af0;
  --violet-dim: #4b2fb0;
  --text-hi: #eaf2ff;
  --text-lo: #7a86a8;
}

[data-theme="light"] {
  --bg-deep: #eef1f8;
  --bg-panel: #ffffff;
  --line: #d3d9ea;
  --teal: #0a8f6e;
  --teal-dim: #0a8f6e;
  --violet: #5a43c9;
  --violet-dim: #5a43c9;
  --text-hi: #1a2036;
  --text-lo: #626d8c;
}

[data-theme="light"] .bg-grid { opacity: 0.35; }
[data-theme="light"] .title { text-shadow: none; }
[data-theme="light"] .eyebrow { text-shadow: none; }
[data-theme="light"] .btn-primary { background: linear-gradient(180deg, rgba(10,143,110,0.14), rgba(10,143,110,0.05)); }
[data-theme="light"] .hud-card,
[data-theme="light"] .icon-btn,
[data-theme="light"] .dpad button { background: rgba(255,255,255,0.85); }

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-deep);
  color: var(--text-hi);
  font-family: 'Rajdhani', sans-serif;
  overflow: hidden;
}

.display {
  font-family: 'Orbitron', sans-serif;
}

/* ---------- background grid ambience ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  opacity: 0.55;
  animation: driftGrid 30s linear infinite;
}
@keyframes driftGrid {
  from { background-position: 0 0, 0 0; }
  to { background-position: 400px 0, 0 400px; }
}
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at 18% 25%, rgba(127, 90, 240, 0.28), transparent 40%),
    radial-gradient(circle at 82% 70%, rgba(0, 255, 200, 0.20), transparent 42%);
  pointer-events: none;
}

/* ---------- start screen ---------- */
.start-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.eyebrow {
  letter-spacing: 6px;
  font-size: 13px;
  color: var(--teal);
  margin: 0 0 14px;
  text-shadow: 0 0 12px rgba(0,255,200,0.6);
}

.title {
  font-size: clamp(40px, 9vw, 84px);
  line-height: 0.98;
  margin: 0 0 8px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--text-hi);
  text-shadow: 0 0 24px rgba(127,90,240,0.55), 0 0 4px rgba(0,255,200,0.5);
}

.title span { color: var(--teal); }

.subtitle {
  color: var(--text-lo);
  font-size: 17px;
  max-width: 460px;
  margin: 0 0 40px;
  letter-spacing: 0.5px;
}

.menu-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  max-width: 320px;
}

.btn {
  font-family: 'Orbitron', sans-serif;
  font-size: 15px;
  letter-spacing: 2px;
  padding: 16px 20px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  color: var(--text-hi);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  text-transform: uppercase;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0px) scale(0.98); }

.btn-primary {
  background: linear-gradient(180deg, rgba(0,255,200,0.18), rgba(0,255,200,0.06));
  border-color: var(--teal-dim);
  color: var(--teal);
  box-shadow: 0 0 0 rgba(0,255,200,0);
}
.btn-primary:hover { box-shadow: 0 0 24px rgba(0,255,200,0.35); border-color: var(--teal); }

.btn-secondary:hover { border-color: var(--violet); color: var(--violet); box-shadow: 0 0 20px rgba(127,90,240,0.25); }

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-lo);
  font-size: 13px;
}
.btn-ghost:hover { color: var(--text-hi); }

.footer-credit {
  position: fixed;
  bottom: 14px;
  left: 0; right: 0;
  text-align: center;
  color: var(--text-lo);
  font-size: 12px;
  letter-spacing: 1px;
  z-index: 1;
}

/* ---------- modal / overlay panels (level select, settings, win) ---------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(4,6,12,0.78);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.overlay.visible { display: flex; }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 28px;
  width: 100%;
  max-width: 480px;
  max-height: 84vh;
  overflow-y: auto;
  box-shadow: 0 0 40px rgba(0,255,200,0.08), 0 0 80px rgba(127,90,240,0.10);
}

.panel h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 20px;
  letter-spacing: 2px;
  margin: 0 0 18px;
  color: var(--teal);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.level-tile {
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  background: rgba(255,255,255,0.02);
  color: var(--text-hi);
  font-family: 'Orbitron', sans-serif;
  font-size: 18px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.level-tile:hover { border-color: var(--teal); box-shadow: 0 0 18px rgba(0,255,200,0.25); }
.level-tile.done { border-color: var(--violet); color: var(--violet); }
.level-tile.done::after { content: '\2713'; font-size: 11px; color: var(--violet); }
.level-tile.locked {
  cursor: not-allowed;
  color: var(--text-lo);
  opacity: 0.45;
  background: rgba(255,255,255,0.01);
}
.level-tile.locked:hover { border-color: var(--line); box-shadow: none; }
.level-tile.locked .lock-icon { font-size: 12px; }

.row { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); }
.row:last-child { border-bottom: none; }
.row span:first-child { color: var(--text-lo); font-size: 14px; letter-spacing: 1px; }

.toggle {
  width: 46px; height: 24px; border-radius: 12px;
  background: var(--line); position: relative; cursor: pointer; border: none;
}
.toggle::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--text-lo); transition: left 0.15s ease, background 0.15s ease;
}
.toggle.on { background: rgba(0,255,200,0.18); }
.toggle.on::after { left: 24px; background: var(--teal); }

.panel-close {
  margin-top: 8px;
}

/* ---------- game screen ---------- */
.game-wrap { position: relative; width: 100%; height: 100vh; z-index: 1; }
#gameCanvas { position: absolute; inset: 0; display: block; touch-action: none; }

.hud-top {
  position: absolute; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 18px 22px; z-index: 5; pointer-events: none;
}
.hud-card {
  background: rgba(8,12,24,0.72);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 16px;
  pointer-events: auto;
}
.hud-card .label { font-size: 11px; letter-spacing: 2px; color: var(--text-lo); margin: 0; }
.hud-card .value { font-family: 'Orbitron', sans-serif; font-size: 16px; color: var(--teal); margin: 2px 0 0; }

.hud-actions { display: flex; gap: 10px; }
.hud-stats { display: flex; gap: 22px; }
.icon-btn {
  width: 42px; height: 42px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(8,12,24,0.72);
  color: var(--text-hi);
  cursor: pointer;
  pointer-events: auto;
  font-family: 'Orbitron', sans-serif;
  font-size: 14px;
}
.icon-btn:hover { border-color: var(--teal); color: var(--teal); }
.icon-btn.active { border-color: var(--teal); color: var(--teal); }

.dpad {
  position: absolute;
  bottom: 26px; left: 50%; transform: translateX(-50%);
  display: none;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(3, 52px);
  gap: 6px;
  z-index: 5;
}
.dpad button {
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(8,12,24,0.72);
  color: var(--teal);
  font-size: 18px;
}
.dpad button:active { background: rgba(0,255,200,0.15); }

@media (pointer: coarse) {
  .dpad { display: grid; }
}

.win-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.cam-hint {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  color: var(--text-lo);
  font-size: 12px;
  letter-spacing: 1px;
  background: rgba(8,12,24,0.55);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 6px 16px;
  pointer-events: none;
  transition: opacity 0.6s ease;
}
.cam-hint.hide { opacity: 0; }

/* ---------- virtual camera controls (rotation + zoom) ---------- */
.cam-controls {
  position: absolute;
  right: 16px;
  bottom: 120px;
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}
.cam-row { display: flex; gap: 8px; }
.cam-controls .icon-btn { width: 42px; height: 42px; touch-action: none; }
.cam-controls .icon-btn:active { background: rgba(0,255,200,0.15); }

@media (pointer: coarse) {
  .cam-controls { bottom: 200px; }
}

/* ---------- win celebration ---------- */
.win-panel { text-align: center; position: relative; overflow: hidden; }
.win-panel .display { font-size: 26px; color: var(--teal); margin: 0 0 8px; letter-spacing: 2px; }
.win-panel p { color: var(--text-lo); margin: 0 0 22px; }
.win-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.celebrate { animation: popIn 0.65s cubic-bezier(.34, 1.56, .64, 1); }
@keyframes popIn {
  0% { transform: scale(0.4); opacity: 0; }
  60% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.confetti {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.confetti span {
  position: absolute;
  top: -12px;
  width: 7px;
  height: 13px;
  border-radius: 2px;
  opacity: 0.95;
  animation-name: confettiFall;
  animation-timing-function: ease-in;
  animation-fill-mode: forwards;
}
@keyframes confettiFall {
  to { transform: translateY(360px) rotate(560deg); opacity: 0; }
}
.win-panel > *:not(.confetti) { position: relative; z-index: 1; }

/* ---------- bottom key-control legend (desktop) ---------- */
.keys-hint {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  gap: 20px;
  background: rgba(8,12,24,0.6);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 20px;
  pointer-events: none;
}
.key-group { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text-lo); letter-spacing: 0.5px; white-space: nowrap; }
kbd {
  display: inline-block;
  min-width: 18px;
  text-align: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--text-hi);
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  line-height: 1.4;
}
[data-theme="light"] kbd { background: rgba(0,0,0,0.05); }

@media (pointer: coarse) {
  .keys-hint { display: none; }
}
@media (max-width: 760px) {
  .keys-hint { display: none; }
}

/* ---------- responsive / mobile ---------- */
@media (max-width: 640px) {
  .title { letter-spacing: 0.5px; }
  .subtitle { font-size: 15px; }
  .menu-col { max-width: 100%; }
  .btn { padding: 14px 16px; font-size: 13px; }

  .hud-top { padding: 12px; gap: 8px; flex-wrap: wrap; }
  .hud-card { padding: 8px 12px; }
  .hud-card .value { font-size: 14px; }
  .hud-stats { gap: 14px; }
  .icon-btn { width: 38px; height: 38px; font-size: 13px; }

  .dpad {
    grid-template-columns: repeat(3, 46px);
    grid-template-rows: repeat(3, 46px);
    bottom: 18px;
  }

  .cam-controls { right: 10px; bottom: 190px; gap: 6px; }
  .cam-controls .icon-btn { width: 38px; height: 38px; font-size: 13px; }

  .panel { padding: 20px; max-width: 100%; }
  .level-grid { grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 8px; }
  .level-tile { font-size: 15px; }
}

@media (max-width: 380px) {
  .hud-top { flex-direction: column; align-items: stretch; }
  .hud-actions { justify-content: flex-end; }
}