/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0a0f;
  --surface: #14141f;
  --neon-green: #39ff14;
  --neon-pink: #ff1493;
  --neon-cyan: #00e5ff;
  --neon-gold: #ffd700;
  --text: #e0e0e0;
  --text-dim: #888;
  --grid-line: rgba(57, 255, 20, 0.08);
  --grid-border: rgba(57, 255, 20, 0.3);
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* ===== SCREENS ===== */
.screen {
  display: none;
  width: 100%; height: 100%;
  position: absolute; top: 0; left: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.screen.active { display: flex; }

/* ===== TITLE ===== */
.title-container {
  text-align: center;
  padding: 20px;
  max-width: 500px;
}

.brand-logo {
  font-size: 1rem;
  color: var(--neon-pink);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.game-title {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--neon-green);
  text-shadow: 0 0 20px rgba(57, 255, 20, 0.5), 0 0 40px rgba(57, 255, 20, 0.2);
  line-height: 1.2;
}

.game-title-en {
  font-size: 1.2rem;
  color: var(--neon-cyan);
  letter-spacing: 3px;
  margin-bottom: 16px;
}

.snake-preview {
  font-size: 3rem;
  margin: 12px 0;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

.description {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.6;
}

.desc-en, .btn-en, .hud-en, .result-title-en {
  font-size: 0.7em;
  color: var(--text-dim);
}

.controls-info {
  background: var(--surface);
  border: 1px solid var(--grid-border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 36px;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  font-family: inherit;
}
.btn:active { transform: scale(0.95); }

.btn-primary {
  background: linear-gradient(135deg, var(--neon-green), #20c911);
  color: #000;
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.3);
}
.btn-primary:hover { box-shadow: 0 0 30px rgba(57, 255, 20, 0.5); }

.btn-share {
  background: #000;
  color: #fff;
  border: 2px solid #fff;
}
.btn-share:hover { background: #1a1a1a; }

.patreon-link {
  margin-top: 20px;
}
.patreon-link a {
  color: var(--neon-pink);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 8px 16px;
  border: 1px solid var(--neon-pink);
  border-radius: 8px;
  transition: background 0.2s;
  display: inline-block;
}
.patreon-link a:hover {
  background: rgba(255, 20, 147, 0.15);
}

/* ===== HUD ===== */
#game-hud {
  display: flex;
  justify-content: space-around;
  width: 100%;
  max-width: 600px;
  padding: 8px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--grid-border);
  flex-shrink: 0;
}

.hud-item {
  text-align: center;
}

.hud-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

.hud-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--neon-green);
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.4);
}

/* ===== CANVAS ===== */
#game-screen {
  justify-content: flex-start;
}

#canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  position: relative;
  overflow: hidden;
}

#game-canvas {
  background: var(--bg);
  border: 2px solid var(--grid-border);
  border-radius: 4px;
  box-shadow: 0 0 30px rgba(57, 255, 20, 0.1);
}

/* ===== MOBILE CONTROLS ===== */
#mobile-controls {
  display: none;
  flex-direction: column;
  align-items: center;
  padding: 8px 0 16px;
  flex-shrink: 0;
  gap: 4px;
}

.ctrl-row {
  display: flex;
  gap: 8px;
}

.ctrl-btn {
  width: 56px; height: 56px;
  border-radius: 12px;
  border: 2px solid var(--grid-border);
  background: var(--surface);
  color: var(--neon-green);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.1s;
}
.ctrl-btn:active {
  background: rgba(57, 255, 20, 0.2);
}

/* ===== OVERLAYS ===== */
#countdown-overlay, #pause-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.hidden { display: none !important; }

#countdown-text {
  font-size: 5rem;
  font-weight: 900;
  color: var(--neon-green);
  text-shadow: 0 0 40px rgba(57, 255, 20, 0.6);
  animation: countPulse 0.6s ease-out;
}

@keyframes countPulse {
  0% { transform: scale(2); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

#pause-overlay p {
  font-size: 2rem;
  font-weight: 700;
  color: var(--neon-cyan);
  margin-bottom: 20px;
  text-align: center;
}

/* ===== RESULT ===== */
.result-container {
  text-align: center;
  padding: 20px;
  max-width: 420px;
  max-height: 100vh;
  overflow-y: auto;
}

.result-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--neon-pink);
  text-shadow: 0 0 20px rgba(255, 20, 147, 0.5);
}
.result-title-en {
  font-size: 1rem;
  display: block;
  margin-bottom: 12px;
}

.result-image-wrap {
  width: 140px; height: 140px;
  margin: 0 auto 16px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--neon-pink);
  box-shadow: 0 0 20px rgba(255, 20, 147, 0.3);
}
.result-image-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.result-stats {
  background: var(--surface);
  border: 1px solid var(--grid-border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 20px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.stat-row:last-child { border-bottom: none; }

.stat-label {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.stat-value {
  font-weight: 700;
  color: var(--neon-gold);
  font-size: 1.1rem;
}

.result-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .game-title { font-size: 2rem; }
  .snake-preview { font-size: 2.2rem; }
  #mobile-controls { display: flex; }
  .hud-value { font-size: 1.1rem; }
  .btn { padding: 12px 24px; font-size: 1rem; }
  .result-title { font-size: 1.6rem; }
  .result-image-wrap { width: 110px; height: 110px; }
}

@media (max-width: 380px) {
  .game-title { font-size: 1.6rem; }
  .ctrl-btn { width: 48px; height: 48px; font-size: 1.1rem; }
}