/* ========================================
   NEON SURGE — Cyberpunk Tower Stacker
   ======================================== */

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --neon-pink: #ff006e;
  --neon-cyan: #00f0ff;
  --neon-purple: #b400ff;
  --neon-gold: #ffd700;
  --bg-dark: #0a0015;
  --glass-bg: rgba(10, 0, 25, 0.88);
  --glass-border: rgba(255, 0, 110, 0.25);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', sans-serif;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-dark);
  font-family: var(--font-display);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

/* --- Canvas --- */
#gameCanvas {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
}

.back-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 1200;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.75);
  font-family: var(--font-body);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  background: rgba(10, 0, 25, 0.55);
  transition: all 0.2s ease;
}

.back-link:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(10, 0, 25, 0.8);
}

/* --- Overlays --- */
.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  opacity: 1;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.96);
}

.overlay-content {
  text-align: center;
  padding: 36px 28px;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  max-width: 380px;
  width: 88%;
  box-shadow:
    0 0 80px rgba(255, 0, 110, 0.1),
    0 0 0 1px rgba(255, 255, 255, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* --- Neon Title --- */
.neon-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.08em;
  color: #fff;
  text-shadow:
    0 0 7px var(--neon-pink),
    0 0 20px var(--neon-pink),
    0 0 42px var(--neon-pink),
    0 0 80px var(--neon-pink);
  animation: neonPulse 2.5s ease-in-out infinite;
  margin-bottom: 8px;
}

@keyframes neonPulse {

  0%,
  100% {
    text-shadow:
      0 0 7px var(--neon-pink),
      0 0 20px var(--neon-pink),
      0 0 42px var(--neon-pink),
      0 0 80px var(--neon-pink);
  }

  50% {
    text-shadow:
      0 0 4px var(--neon-pink),
      0 0 10px var(--neon-pink),
      0 0 22px var(--neon-pink),
      0 0 44px var(--neon-pink);
  }
}

.subtitle {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.35em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 28px;
}

/* --- High Score --- */
.high-score-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 28px;
}

.hs-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.35);
}

.hs-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--neon-cyan);
  text-shadow: 0 0 12px var(--neon-cyan);
}

/* --- Buttons --- */
.btn {
  display: block;
  width: 100%;
  padding: 16px 24px;
  border: none;
  border-radius: 14px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 10px;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-pink), #cc0058);
  color: #fff;
  box-shadow:
    0 4px 24px rgba(255, 0, 110, 0.35),
    0 0 0 1px rgba(255, 0, 110, 0.5);
}

.btn-primary:hover {
  box-shadow:
    0 6px 32px rgba(255, 0, 110, 0.5),
    0 0 0 1px rgba(255, 0, 110, 0.7);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--neon-cyan);
  border: 1px solid rgba(0, 240, 255, 0.2);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.06);
}

.btn-secondary:hover {
  background: rgba(0, 240, 255, 0.08);
  border-color: rgba(0, 240, 255, 0.4);
}

.btn-share {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-share:hover {
  background: rgba(255, 255, 255, 0.1);
}

.pulse {
  animation: btnPulse 2s ease-in-out infinite;
}

@keyframes btnPulse {

  0%,
  100% {
    box-shadow: 0 4px 24px rgba(255, 0, 110, 0.35), 0 0 0 1px rgba(255, 0, 110, 0.5);
  }

  50% {
    box-shadow: 0 4px 40px rgba(255, 0, 110, 0.6), 0 0 0 2px rgba(255, 0, 110, 0.7);
  }
}

/* --- Streak --- */
.streak-display {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.3);
  margin-top: 8px;
  letter-spacing: 0.1em;
}

/* --- Game Over --- */
.game-over-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.12em;
  margin-bottom: 20px;
  text-shadow: 0 0 20px var(--neon-pink);
}

.final-score-block {
  margin-bottom: 20px;
}

.score-label {
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.35);
  margin-bottom: 4px;
}

.score-value {
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 20px var(--neon-cyan);
  line-height: 1.1;
}

.new-high {
  font-size: 0.8rem;
  color: var(--neon-gold);
  text-shadow: 0 0 12px var(--neon-gold);
  margin-top: 6px;
  animation: newHighPop 0.6s ease-out;
}

.new-high.hidden {
  display: none;
}

@keyframes newHighPop {
  0% {
    transform: scale(0);
    opacity: 0;
  }

  60% {
    transform: scale(1.2);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* --- Stats Row --- */
.stats-row {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 18px;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan);
}

.stat-label {
  font-size: 0.5rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.3);
  margin-top: 2px;
}

/* --- Scorecard --- */
.scorecard-preview {
  font-size: 1rem;
  line-height: 1.3;
  margin-bottom: 18px;
  word-break: break-all;
  letter-spacing: 2px;
}

/* --- Button Row --- */
.button-row {
  display: flex;
  gap: 10px;
}

.button-row .btn {
  flex: 1;
  margin-bottom: 0;
}

/* --- Share Feedback --- */
.share-feedback {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--neon-gold);
  margin-top: 10px;
  animation: fadeIn 0.3s ease;
}

.share-feedback.hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Screen Shake --- */
@keyframes screenShake {

  0%,
  100% {
    transform: translate(0, 0);
  }

  10% {
    transform: translate(-3px, -2px);
  }

  20% {
    transform: translate(4px, 1px);
  }

  30% {
    transform: translate(-2px, 3px);
  }

  40% {
    transform: translate(3px, -1px);
  }

  50% {
    transform: translate(-1px, 2px);
  }

  60% {
    transform: translate(2px, -3px);
  }

  70% {
    transform: translate(-4px, 1px);
  }

  80% {
    transform: translate(1px, -2px);
  }

  90% {
    transform: translate(-2px, 3px);
  }
}

.shake {
  animation: screenShake 0.3s ease-out;
}

/* --- Responsive --- */
@media (max-height: 600px) {
  .back-link {
    top: 10px;
    left: 10px;
    font-size: 0.74rem;
    padding: 7px 10px;
  }

  .neon-title {
    font-size: 2.6rem;
  }

  .overlay-content {
    padding: 24px 20px;
  }

  .score-value {
    font-size: 2.2rem;
  }
}

@media (max-width: 360px) {
  .neon-title {
    font-size: 2.8rem;
  }

  .overlay-content {
    padding: 28px 18px;
  }
}