/* ============================
   游戏 HUD 样式
   ============================ */
#screen-hud {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 5;
  pointer-events: none;
  transition: opacity 0.3s;
}
#screen-hud.hidden { opacity: 0; }
#screen-hud > * { pointer-events: auto; }

/* 顶部统计 */
.hud-top {
  position: absolute;
  top: 10px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 16px;
}
.hud-stats {
  display: flex;
  gap: 14px;
}
.hud-stat {
  font-size: 13px;
  font-weight: 600;
  background: rgba(0,0,0,0.5);
  padding: 4px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(4px);
}
.hud-level-info {
  font-size: 12px;
  color: var(--dim);
  background: rgba(0,0,0,0.4);
  padding: 4px 12px;
  border-radius: 12px;
}

/* 血条/经验条 */
.hud-bars {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  width: min(500px, 70vw);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hud-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.hud-bar-label {
  font-size: 11px;
  font-weight: 700;
  width: 28px;
  text-align: right;
  color: var(--dim);
}
.hud-bar-track {
  flex: 1;
  height: 10px;
  background: rgba(0,0,0,0.5);
  border-radius: 5px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
}
.hud-bar-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.15s ease;
}
.hp-fill {
  background: linear-gradient(90deg, #FF1744, #FF6B00);
  box-shadow: 0 0 10px rgba(255,23,68,0.3);
}
.xp-fill {
  background: linear-gradient(90deg, #B026FF, #D4A5FF);
  box-shadow: 0 0 10px rgba(176,38,255,0.3);
}
.hud-bar-value {
  font-size: 11px;
  font-weight: 600;
  width: 60px;
  color: var(--dim);
  text-align: left;
}

/* 技能图标 */
.hud-skills {
  position: absolute;
  bottom: 110px;
  right: 16px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  max-width: 150px;
}
.hud-skill-icon {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  background: rgba(0,0,0,0.5);
  border: 1.5px solid var(--skill-color, var(--cyan));
  transition: all 0.3s;
  box-shadow: 0 0 8px color-mix(in srgb, var(--skill-color, var(--cyan)) 20%, transparent);
}

/* 通知 */
.hud-notifications {
  position: absolute;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.hud-notif {
  font-size: 14px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 8px;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.08);
  animation: notifFade 2s ease-out forwards;
}
@keyframes notifFade {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-20px); }
}

/* 武器栏 */
.hud-weapons {
  position: absolute;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 6;
}
.hud-weapon-item {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: rgba(0,0,0,0.55);
  border: 1.5px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}
.hud-weapon-item:hover {
  transform: translateY(-2px);
  border-color: var(--wpn-color, var(--cyan));
  box-shadow: 0 0 10px color-mix(in srgb, var(--wpn-color, var(--cyan)) 30%, transparent);
}
.hud-weapon-item.current {
  border-color: var(--wpn-color, var(--cyan));
  box-shadow: 0 0 12px color-mix(in srgb, var(--wpn-color, var(--cyan)) 40%, transparent);
  background: rgba(0,0,0,0.7);
}
.hud-weapon-item.current::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--wpn-color, var(--cyan));
}
.hud-wpn-icon {
  font-size: 18px;
  line-height: 1;
}
.hud-wpn-lvl {
  font-size: 9px;
  font-weight: 700;
  color: var(--dim);
  line-height: 1;
  margin-top: 1px;
}

/* 事件提示 */
#hudEvent {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 28px;
  font-weight: 900;
  text-shadow: 0 0 20px rgba(255,215,0,0.5);
  animation: eventPop 1.5s ease-out forwards;
  pointer-events: none;
}
@keyframes eventPop {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.5); }
  20% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
  40% { transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1) translateY(-30px); }
}