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

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

:root {
  --bg-dark:    #0a0a14;
  --bg-mid:     #11112a;
  --accent:     #00f0ff;
  --accent2:    #ff3aff;
  --warn:       #ff6b00;
  --danger:     #ff1a1a;
  --text:       #e8e8ff;
  --text-dim:   #7070aa;
  --gold:       #ffd700;
}

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

#app { width: 100%; height: 100%; position: relative; }

/* =====================
   屏幕切换
===================== */
.screen {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.4s ease;
}
.screen.active { opacity: 1; pointer-events: all; }

/* =====================
   启动画面
===================== */
#screen-start {
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0,240,255,0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(255,58,255,0.08) 0%, transparent 60%),
    var(--bg-dark);
}

.start-content {
  display: flex; flex-direction: column; align-items: center; gap: 24px;
  text-align: center;
}

.game-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 900;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.08em;
  filter: drop-shadow(0 0 20px rgba(0,240,255,0.4));
  animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {
  0%,100% { filter: drop-shadow(0 0 20px rgba(0,240,255,0.4)); }
  50%      { filter: drop-shadow(0 0 40px rgba(0,240,255,0.8)) drop-shadow(0 0 60px rgba(255,58,255,0.3)); }
}

.game-subtitle {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(0.7rem, 2vw, 1rem);
  letter-spacing: 0.4em;
  color: var(--text-dim);
  margin-top: -16px;
}

/* =====================
   按钮
===================== */
.btn-primary, .btn-secondary {
  padding: 14px 48px;
  border: none; border-radius: 4px;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 1.05rem; font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s;
  min-width: 200px;
}
.btn-primary {
  background: linear-gradient(90deg, var(--accent), #0080cc);
  color: #000;
  box-shadow: 0 0 20px rgba(0,240,255,0.4);
}
.btn-primary:hover  { transform: scale(1.04); box-shadow: 0 0 32px rgba(0,240,255,0.7); }
.btn-primary:active { transform: scale(0.97); }

.btn-secondary {
  background: transparent;
  border: 1px solid var(--text-dim);
  color: var(--text-dim);
}
.btn-secondary:hover  { border-color: var(--accent); color: var(--accent); transform: scale(1.03); }
.btn-secondary:active { transform: scale(0.97); }

/* =====================
   说明画面
===================== */
#screen-howto {
  background: rgba(10,10,20,0.97);
}

.howto-content {
  max-width: 480px; width: 90%;
  display: flex; flex-direction: column; gap: 24px; align-items: center;
}

.howto-content h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.6rem;
  color: var(--accent);
}

.howto-list {
  width: 100%;
  display: flex; flex-direction: column; gap: 16px;
}

.howto-item {
  display: flex; align-items: center; gap: 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 14px 18px;
}
.howto-item .icon { font-size: 1.8rem; }
.howto-item p { font-size: 0.92rem; color: var(--text); line-height: 1.5; }

/* =====================
   游戏画面
===================== */
#screen-game { background: var(--bg-dark); }

#gameCanvas {
  display: block;
  width: 100%; height: 100%;
  image-rendering: pixelated;
}

/* =====================
   结算画面
===================== */
#screen-gameover {
  background: rgba(10,10,20,0.97);
}

.gameover-content {
  display: flex; flex-direction: column; align-items: center; gap: 28px;
  text-align: center;
}

#gameover-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.8rem, 5vw, 3rem);
  color: var(--danger);
  text-shadow: 0 0 30px rgba(255,26,26,0.6);
}

.score-display {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.score-display .label  { font-size: 0.85rem; color: var(--text-dim); letter-spacing: 0.1em; }
.score-display .score-value {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 20px rgba(255,215,0,0.5);
}

/* =====================
   移动端适配
===================== */
@media (max-width: 480px) {
  .btn-primary, .btn-secondary { padding: 12px 32px; font-size: 0.95rem; min-width: 160px; }
}

/* =====================
   【新增】肉鸽 Buff 界面
===================== */
#buff-modal {
  background: rgba(0, 0, 0, 0.85); /* 半透明黑底 */
  backdrop-filter: blur(5px);
  z-index: 999; /* 保证在最上层 */
}
.buff-container {
  text-align: center;
  color: var(--text);
  width: 90%;
  max-width: 600px;
}
.buff-container h2 {
  color: var(--gold);
  margin-bottom: 10px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
.buff-cards {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 20px;
}
.buff-card {
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  border: 2px solid #4da8da;
  border-radius: 12px;
  padding: 15px 20px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: left;
}
.buff-card:hover {
  transform: scale(1.02);
  box-shadow: 0 0 15px #4da8da;
  background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
}
.buff-card h3 {
  margin: 0 0 8px 0;
  color: var(--accent);
  font-size: 1.2rem;
}
.buff-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text);
}