@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Noto+Sans+JP:wght@300;400;700&display=swap');

:root {
  --bg: #0a0a12;
  --surface: #12121e;
  --panel: #1a1a2e;
  --accent: #00ffcc;
  --accent2: #ff6b35;
  --accent3: #7b61ff;
  --text: #e0e0f0;
  --text-dim: #5a5a7a;
  --glow: 0 0 20px rgba(0,255,204,0.4);
  --glow2: 0 0 20px rgba(255,107,53,0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans JP', sans-serif;
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

/* ===== SCREENS ===== */
.screen {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  transition: opacity 0.4s;
  z-index: 10;
}
.screen.hidden { opacity: 0; pointer-events: none; }

/* ===== TITLE SCREEN ===== */
#title-screen {
  background: radial-gradient(ellipse at 30% 30%, #1a0a2e 0%, #0a0a12 60%);
}
.title-bg {
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(0,255,204,0.04) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(0,255,204,0.04) 40px);
  animation: gridPulse 4s ease-in-out infinite;
}
@keyframes gridPulse { 0%,100%{opacity:0.5} 50%{opacity:1} }

.title-logo {
  font-family: 'Orbitron', monospace;
  font-size: clamp(2rem, 8vw, 5rem);
  font-weight: 900;
  text-align: center;
  line-height: 1.1;
  letter-spacing: 0.05em;
  position: relative;
  z-index: 1;
}
.title-jp {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: clamp(1rem, 3vw, 1.8rem);
  font-weight: 300;
  letter-spacing: 0.5em;
  color: var(--text-dim);
  margin-top: 0.3em;
}
.title-accent { color: var(--accent); text-shadow: var(--glow); }
.title-sub { color: var(--accent3); }

.gravity-demo {
  display: flex; gap: 1.5rem; margin: 2.5rem 0;
  position: relative; z-index: 1;
}
.dir-icon {
  width: 44px; height: 44px;
  border: 1px solid var(--text-dim);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  color: var(--text-dim);
  transition: all 0.3s;
}
.dir-icon.active {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glow);
  transform: scale(1.2);
}

.btn {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.8rem, 2vw, 1rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.9em 2.5em;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  position: relative; z-index: 1;
  transition: all 0.2s;
  clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
}
.btn:hover, .btn:active {
  background: var(--accent);
  color: var(--bg);
  box-shadow: var(--glow);
  transform: translateY(-2px);
}
.btn-secondary {
  border-color: var(--accent3);
  color: var(--accent3);
  margin-top: 0.8rem;
}
.btn-secondary:hover, .btn-secondary:active {
  background: var(--accent3);
  color: var(--bg);
  box-shadow: 0 0 20px rgba(123,97,255,0.4);
}

.tagline {
  font-size: clamp(0.75rem, 2vw, 0.95rem);
  color: var(--text-dim);
  margin-top: 2rem;
  letter-spacing: 0.1em;
  position: relative; z-index: 1;
}

/* ===== GAME SCREEN ===== */
#game-screen {
  background: var(--bg);
  flex-direction: column;
  padding: 0;
}

#hud {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid rgba(0,255,204,0.15);
  flex-shrink: 0;
  z-index: 5;
}

.hud-block {
  display: flex; flex-direction: column; align-items: center;
  min-width: 70px;
}
.hud-label {
  font-family: 'Orbitron', monospace;
  font-size: 0.5rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  text-transform: uppercase;
}
.hud-value {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.9rem, 2.5vw, 1.2rem);
  font-weight: 700;
  color: var(--accent);
}

.stage-name {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.7rem, 2vw, 1rem);
  font-weight: 700;
  color: var(--text);
  text-align: center;
}
.stage-num {
  font-size: 0.6em;
  color: var(--text-dim);
  display: block;
  letter-spacing: 0.2em;
}

#canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

#game-canvas {
  display: block;
  image-rendering: pixelated;
}

/* タップエフェクト */
#tap-ripple {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  border: 2px solid var(--accent);
  transform: scale(0);
  opacity: 0;
}

@keyframes rippleOut {
  0%  { transform: scale(0); opacity: 1; }
  100%{ transform: scale(6); opacity: 0; }
}

#gravity-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.5rem, 2vw, 1.5rem);
  padding: 0.6rem 1rem;
  background: var(--panel);
  border-top: 1px solid rgba(0,255,204,0.15);
  flex-shrink: 0;
}

.grav-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--text-dim);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  color: var(--text-dim);
  transition: all 0.25s ease;
  position: relative;
}
.grav-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glow), inset 0 0 15px rgba(0,255,204,0.1);
  animation: gravPulse 1s ease-in-out infinite;
}
@keyframes gravPulse {
  0%,100% { box-shadow: var(--glow), inset 0 0 15px rgba(0,255,204,0.1); }
  50%      { box-shadow: 0 0 30px rgba(0,255,204,0.7), inset 0 0 20px rgba(0,255,204,0.2); }
}

.grav-label {
  font-family: 'Orbitron', monospace;
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
}

.tap-hint {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: clamp(0.6rem, 1.5vw, 0.75rem);
  color: var(--text-dim);
  letter-spacing: 0.1em;
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

/* ===== OVERLAY: CLEAR ===== */
#overlay {
  position: fixed; inset: 0;
  background: rgba(10,10,18,0.85);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 20;
  backdrop-filter: blur(4px);
}
#overlay.hidden { display: none; }

.overlay-box {
  background: var(--panel);
  border: 1px solid var(--accent);
  padding: clamp(1.5rem, 5vw, 3rem) clamp(2rem, 8vw, 5rem);
  text-align: center;
  box-shadow: var(--glow);
  clip-path: polygon(16px 0%, 100% 0%, calc(100% - 16px) 100%, 0% 100%);
  max-width: min(90vw, 480px);
  width: 100%;
}
.overlay-title {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  font-weight: 900;
  color: var(--accent);
  text-shadow: var(--glow);
  letter-spacing: 0.1em;
  margin-bottom: 0.3em;
}
.overlay-sub {
  color: var(--text-dim);
  font-size: clamp(0.75rem, 2vw, 0.9rem);
  margin-bottom: 1.5rem;
  letter-spacing: 0.1em;
}
.score-row {
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 0.5rem 0;
  font-size: clamp(0.8rem, 2vw, 0.95rem);
}
.score-row span:last-child {
  font-family: 'Orbitron', monospace;
  color: var(--accent);
}
.stars-display {
  font-size: 2rem;
  margin: 1rem 0;
  letter-spacing: 0.3em;
}
.btn-row {
  display: flex; gap: 1rem; justify-content: center;
  margin-top: 1.5rem; flex-wrap: wrap;
}

/* ===== STAGE SELECT ===== */
#stage-select {
  background: radial-gradient(ellipse at 70% 70%, #1a0a2e 0%, #0a0a12 60%);
  overflow-y: auto;
  padding: 2rem 1rem;
}
.stage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 0.8rem;
  width: min(600px, 90vw);
  margin-top: 1.5rem;
}
.stage-cell {
  aspect-ratio: 1;
  border: 1.5px solid var(--text-dim);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
  position: relative;
}
.stage-cell:hover, .stage-cell:active {
  border-color: var(--accent);
  box-shadow: var(--glow);
  transform: scale(1.05);
}
.stage-cell .s-num {
  font-family: 'Orbitron', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}
.stage-cell .s-stars {
  font-size: 0.6rem;
  letter-spacing: 0.05em;
}
.stage-cell.locked {
  opacity: 0.3;
  cursor: not-allowed;
}
.stage-cell.cleared { border-color: rgba(0,255,204,0.4); }

.page-title {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.1em;
  position: relative; z-index: 1;
}

/* パーティクルキャンバス */
#particle-canvas {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 15;
}