:root{
  --bg1:#1b1056; --bg2:#3a1c71; --bg3:#5f0a87; --accent:#ffd166; --accent2:#06d6a0;
  --pink:#ff6b9d; --blue:#4cc9f0; --good:#06d6a0; --bad:#ef476f; --text:#fff;
  --panel:rgba(28,18,72,.92);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;}
html,body{height:100%;overflow:hidden;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Comic Sans MS",system-ui,sans-serif;
  color:var(--text);
  background:radial-gradient(circle at 30% 20%,var(--bg3),transparent 60%),
             radial-gradient(circle at 80% 80%,var(--bg2),transparent 55%),
             linear-gradient(160deg,var(--bg1),#0d0726);
  user-select:none;
}
#app{position:relative;width:100vw;height:100vh;overflow:hidden;}
#game{position:absolute;inset:0;width:100%;height:100%;display:block;}
.hidden{display:none !important;}

/* ---------- HUD（底部） ---------- */
#hud{
  position:absolute;bottom:0;left:0;right:0;z-index:5;
  display:flex;align-items:center;justify-content:space-between;
  padding:8px 16px 10px;gap:10px;
  background:linear-gradient(0deg,rgba(13,7,38,.92),rgba(13,7,38,.55) 70%,rgba(13,7,38,0));
  pointer-events:none;
}
#hud .icon-btn{pointer-events:auto;}
.hud-left,.hud-right{display:flex;align-items:center;gap:14px;}
.hud-stat{font-size:16px;opacity:.95;}
.hud-stat b{color:var(--accent);font-size:20px;}
.hearts{display:flex;gap:4px;font-size:24px;filter:drop-shadow(0 2px 3px rgba(0,0,0,.4));}
.heart{display:inline-block;color:#ff3b5c;font-size:24px;line-height:1;font-variant-emoji:text;transition:color .2s,opacity .2s;}
/* 已扣掉的心：从红变成灰色（颜色由 CSS 控制，电脑/手机一致） */
.hearts .heart.lost{color:#9aa0a6;opacity:.85;}
.icon-btn{
  background:rgba(255,255,255,.15);border:none;color:#fff;font-size:20px;
  width:42px;height:42px;border-radius:50%;cursor:pointer;transition:.15s;
}
.icon-btn:hover{background:rgba(255,255,255,.3);transform:scale(1.08);}

/* ---------- 手机端 HUD 优化 ---------- */
@media (max-width:600px){
  #hud{
    flex-direction:row;
    align-items:flex-end;
    justify-content:space-between;
    /* 底部留出空间给横排爱心，再 safe-area 兜底 */
    padding:6px 10px calc(46px + env(safe-area-inset-bottom, 0px));
    gap:0;
  }
  .hud-left{
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-end;
    gap:1px;
    max-width:38vw;
  }
  .hud-right{
    flex-direction:row;
    align-items:flex-end;
    justify-content:flex-end;
    gap:6px;
    max-width:38vw;
  }
  .hearts{
    position:absolute;
    left:50%;
    bottom:calc(6px + env(safe-area-inset-bottom, 0px));
    transform:translateX(-50%);
    font-size:21px;
    gap:4px;
    padding:3px 12px;
    border-radius:999px;
    background:rgba(13,7,38,.78);
    box-shadow:0 4px 12px rgba(0,0,0,.35);
    white-space:nowrap;
  }
  .hud-stat{font-size:12px;white-space:nowrap;line-height:1.25;}
  .hud-stat b{font-size:13px;}
  .icon-btn{width:32px;height:32px;font-size:15px;}
}

/* ---------- Overlays ---------- */
.overlay{
  position:absolute;inset:0;z-index:10;display:flex;align-items:center;justify-content:center;
  background:rgba(8,4,24,.55);backdrop-filter:blur(4px);padding:16px;
}
.overlay.soft{background:rgba(8,4,24,.35);}
.panel{
  width:min(460px,92vw);
  background:var(--panel);
  border:2px solid rgba(255,255,255,.12);
  border-radius:26px;padding:26px 24px;text-align:center;
  box-shadow:0 20px 60px rgba(0,0,0,.5),inset 0 0 30px rgba(255,255,255,.04);
  animation:pop .35s cubic-bezier(.2,1.3,.5,1);
}
@keyframes pop{from{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}
.title{font-size:34px;margin-bottom:4px;text-shadow:0 0 18px var(--pink);}
.subtitle{opacity:.85;margin-bottom:18px;font-size:15px;}
.big-emoji{font-size:64px;margin-bottom:6px;animation:bounce 1.2s infinite;}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.field{margin:14px 0;text-align:left;}
.field-label{font-size:14px;opacity:.8;margin-bottom:8px;}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  border:2px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);
  color:#fff;padding:9px 16px;border-radius:999px;font-size:15px;cursor:pointer;transition:.15s;
}
.chip:hover{background:rgba(255,255,255,.16);}
.chip.active{
  background:linear-gradient(135deg,var(--accent),var(--pink));border-color:transparent;
  color:#2a1740;font-weight:800;box-shadow:0 6px 16px rgba(255,107,157,.4);
}
.switch{display:flex;align-items:center;gap:8px;font-size:15px;margin:7px 0;cursor:pointer;}
.switch input{width:18px;height:18px;accent-color:var(--accent2);}
.big-btn{
  margin-top:18px;width:100%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--accent2),var(--blue));color:#06281f;
  font-size:21px;font-weight:800;padding:14px;border-radius:16px;
  box-shadow:0 10px 24px rgba(6,214,160,.4);transition:.15s;
}
.big-btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(6,214,160,.55);}
.big-btn:active{transform:translateY(1px);}
.ghost-btn{
  margin-top:10px;width:100%;border:2px solid rgba(255,255,255,.25);background:transparent;
  color:#fff;font-size:16px;padding:11px;border-radius:14px;cursor:pointer;
}
.ghost-btn:hover{background:rgba(255,255,255,.1);}
.hint{margin-top:14px;font-size:13px;opacity:.7;line-height:1.5;}

/* 飘字反馈 */
.float-text{
  position:absolute;z-index:8;font-weight:800;font-size:26px;pointer-events:none;
  text-shadow:0 2px 6px rgba(0,0,0,.4);animation:floatUp .9s ease-out forwards;
}
@keyframes floatUp{from{transform:translateY(0);opacity:1}to{transform:translateY(-60px);opacity:0}}

/* ---------- 机库 ---------- */
.panel.wide{width:min(560px,94vw);}
#planeList{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:12px;margin:16px 0 6px;
}
.plane-card{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:16px;padding:12px 10px;text-align:center;
}
.plane-emoji{font-size:40px;line-height:1;}
.plane-name{font-size:15px;font-weight:800;margin-top:4px;}
.plane-count{font-size:13px;opacity:.85;margin-top:4px;min-height:18px;}
.merge-btn{
  margin-top:8px;width:100%;border:none;cursor:pointer;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),var(--pink));color:#2a1740;
  font-weight:800;font-size:13px;padding:8px;
}
.merge-btn.disabled{
  background:rgba(255,255,255,.1);color:rgba(255,255,255,.6);cursor:default;font-weight:600;
}
.merge-btn:not(.disabled):hover{filter:brightness(1.08);transform:translateY(-1px);}

/* ---------- 奖励飘条 ---------- */
.reward-toast{
  position:absolute;top:18px;left:50%;transform:translate(-50%,-30px);
  z-index:20;padding:12px 22px;border-radius:999px;
  background:linear-gradient(135deg,#ffd166,#ff6b9d);color:#3a1740;font-weight:800;font-size:17px;
  box-shadow:0 10px 30px rgba(0,0,0,.45);opacity:0;transition:.35s ease;
  pointer-events:none;white-space:nowrap;
}
.reward-toast.show{opacity:1;transform:translate(-50%,0);}