/* ====== STELLAR ASSAULT - styles ====== */
:root{
  --bg:#05060f;
  --bg2:#0b1230;
  --neon:#3df0ff;
  --neon2:#ff3df0;
  --gold:#ffd23d;
  --green:#5dff7a;
  --red:#ff4d5e;
  --ink:#e8f4ff;
  --font-disp:'Orbitron','Trebuchet MS',sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;900&family=Rajdhani:wght@500;600;700&display=swap');

*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{
  height:100%;width:100%;overflow:hidden;
  background:#000;
  font-family:'Rajdhani',var(--font-disp);
  color:var(--ink);
  user-select:none;touch-action:none;
}

#game-wrap{
  position:fixed;inset:0;
  display:flex;align-items:center;justify-content:center;
  background:
    radial-gradient(ellipse at 50% -10%, #16205c 0%, transparent 60%),
    radial-gradient(ellipse at 50% 120%, #2a0b3a 0%, transparent 55%),
    var(--bg);
}

#game{
  display:block;
  background:linear-gradient(180deg,#02030a 0%,#070b22 50%,#0a0518 100%);
  box-shadow:0 0 60px rgba(61,240,255,.15), inset 0 0 80px rgba(0,0,0,.6);
  touch-action:none;
}

/* ===== HUD ===== */
#hud{
  position:absolute;top:0;left:0;right:0;
  display:flex;justify-content:space-between;
  padding:10px 14px;
  font-family:var(--font-disp);
  pointer-events:none;z-index:10;
  text-shadow:0 0 8px rgba(61,240,255,.6);
}
.hud-row{display:flex;align-items:center;gap:6px;font-size:15px;font-weight:700;letter-spacing:1px;}
.hud-label{font-size:10px;color:var(--neon);opacity:.8;letter-spacing:2px;}
.hud-sep{font-size:11px;opacity:.5;}
.lives{display:flex;gap:4px;}
.lives .heart{
  width:16px;height:16px;
  background:var(--red);
  clip-path:polygon(50% 100%,0 35%,15% 0,50% 25%,85% 0,100% 35%);
  filter:drop-shadow(0 0 5px var(--red));
}

/* ===== パワーバー ===== */
#powerbar{
  position:absolute;left:0;right:0;bottom:8px;
  display:flex;justify-content:center;gap:10px;
  pointer-events:none;z-index:10;
}
.pw{
  display:flex;align-items:center;gap:4px;
  background:rgba(8,14,40,.7);
  border:1px solid rgba(61,240,255,.35);
  border-radius:20px;padding:3px 10px;
  font-family:var(--font-disp);font-size:12px;font-weight:700;
  backdrop-filter:blur(4px);
}
.pw-ico{font-size:13px;}
.pw:nth-child(1){border-color:rgba(255,77,94,.5);color:#ffd0d4;}
.pw:nth-child(1) .pw-ico{color:var(--red);}
.pw:nth-child(2){border-color:rgba(93,255,122,.5);color:#d3ffdc;}
.pw:nth-child(2) .pw-ico{color:var(--green);}
.pw:nth-child(3){border-color:rgba(255,210,61,.5);color:#fff0c4;}
.pw:nth-child(3) .pw-ico{color:var(--gold);}
.pw-label{font-size:9px;opacity:.7;}

/* ===== ボスHP ===== */
#bossbar{
  position:absolute;top:46px;left:50%;transform:translateX(-50%);
  width:78%;max-width:520px;z-index:10;pointer-events:none;
  transition:opacity .3s;
}
#bossbar.hidden{opacity:0;}
.boss-name{
  font-family:var(--font-disp);font-size:12px;font-weight:900;
  letter-spacing:3px;color:var(--neon2);text-align:center;margin-bottom:3px;
  text-shadow:0 0 10px var(--neon2);
}
.boss-hp-outer{
  height:10px;background:rgba(0,0,0,.5);
  border:1px solid rgba(255,61,240,.6);border-radius:6px;overflow:hidden;
  box-shadow:0 0 12px rgba(255,61,240,.3);
}
.boss-hp-inner{
  height:100%;width:100%;
  background:linear-gradient(90deg,var(--neon2),#ff8a3d,var(--gold));
  transition:width .15s;
}

/* ===== トースト ===== */
#toast-area{
  position:absolute;top:42%;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:6px;
  pointer-events:none;z-index:12;
}
.toast{
  font-family:var(--font-disp);font-weight:700;font-size:18px;letter-spacing:1px;
  padding:6px 16px;border-radius:8px;
  background:rgba(8,14,40,.85);border:1px solid;
  animation:toastUp 1.1s ease forwards;
  white-space:nowrap;
}
.toast.power{color:#ffd0d4;border-color:var(--red);text-shadow:0 0 8px var(--red);}
.toast.spread{color:#d3ffdc;border-color:var(--green);text-shadow:0 0 8px var(--green);}
.toast.range{color:#fff0c4;border-color:var(--gold);text-shadow:0 0 8px var(--gold);}
.toast.warn{color:#fff;border-color:var(--neon2);font-size:24px;text-shadow:0 0 12px var(--neon2);}
.toast.life{color:#fff;border-color:var(--red);font-size:22px;}
@keyframes toastUp{
  0%{opacity:0;transform:translateY(14px) scale(.8);}
  18%{opacity:1;transform:translateY(0) scale(1);}
  80%{opacity:1;}
  100%{opacity:0;transform:translateY(-26px) scale(.95);}
}

/* ===== オーバーレイ ===== */
.overlay{
  position:absolute;inset:0;z-index:30;
  display:flex;align-items:center;justify-content:center;
  background:radial-gradient(ellipse at 50% 40%, rgba(11,18,48,.78), rgba(2,3,10,.95));
  backdrop-filter:blur(3px);
}
.overlay.hidden{display:none;}
.overlay-inner{text-align:center;padding:24px;animation:fadeIn .5s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
.title{
  font-family:var(--font-disp);font-weight:900;
  font-size:clamp(34px,9vw,68px);line-height:.95;letter-spacing:2px;
  color:var(--neon);text-shadow:0 0 18px var(--neon),0 0 40px rgba(61,240,255,.4);
}
.title span{display:block;color:var(--neon2);text-shadow:0 0 18px var(--neon2),0 0 40px rgba(255,61,240,.4);}
.subtitle{margin-top:8px;font-size:15px;letter-spacing:6px;color:var(--ink);opacity:.7;}
.how{margin:22px auto;max-width:340px;font-size:13px;line-height:1.9;opacity:.85;}
.how b{color:var(--gold);}
.result-score{font-family:var(--font-disp);font-size:20px;margin-top:14px;letter-spacing:2px;}
.result-score span{color:var(--gold);font-size:30px;text-shadow:0 0 12px var(--gold);}
.result-reach{margin-top:8px;font-size:14px;opacity:.75;}
.btn{
  margin-top:26px;
  font-family:var(--font-disp);font-weight:700;font-size:18px;letter-spacing:3px;
  color:#02030a;background:linear-gradient(135deg,var(--neon),#7df);
  border:none;border-radius:30px;padding:14px 46px;cursor:pointer;
  box-shadow:0 0 24px rgba(61,240,255,.5);transition:transform .12s,box-shadow .2s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(61,240,255,.8);}
.btn:active{transform:scale(.96);}
.hidden{display:none;}


/* ===== ゲーム説明 ===== */
.shooting-info {
  width: min(760px, calc(100% - 28px));
  margin: 18px auto 28px;
  padding: 16px 18px;
  border: 1px solid rgba(61,240,255,.25);
  border-radius: 14px;
  background: rgba(8,14,40,.86);
  color: var(--ink);
  line-height: 1.8;
}
.shooting-info h2 {
  margin: 12px 0 8px;
  color: var(--neon);
  font-family: var(--font-disp);
  font-size: 18px;
}
.shooting-info p {
  margin: 0 0 8px;
  font-size: 13px;
  opacity: .85;
}
.back-link {
  color: var(--neon);
  font-size: 13px;
  text-decoration: underline;
}

/* ===== 説明文を一定時間後に自動で消す ===== */
/* 表示6秒 → 1.2秒かけてフェードアウト → 高さも畳む */
.autohide-desc {
  animation: descAutoHide 1.2s ease 6s forwards;
}
@keyframes descAutoHide {
  0%   { opacity: .85; max-height: 200px; margin-top: var(--mt,0); }
  99%  { opacity: 0;   max-height: 200px; }
  100% { opacity: 0;   max-height: 0; margin: 0; padding: 0;
         overflow: hidden; pointer-events: none; }
}
/* アニメーションを無効にしたい人への配慮 */
@media (prefers-reduced-motion: reduce) {
  .autohide-desc { animation: none; }
}