/* Stack Spire — low-poly twilight stack puzzle */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#1a1530;--panel:rgba(28,22,52,.94);--text:#f0eaf8;--muted:#9a8fb8;
  --accent:#7c6cff;--hot:#ff6bcb;--warn:#ffd36b;--ok:#6dffb0;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,Cantarell,sans-serif;
  --safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);
}
html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--text);font-family:var(--font);
  -webkit-tap-highlight-color:transparent;touch-action:manipulation;user-select:none;-webkit-user-select:none}
#app{position:relative;width:100%;height:100%;height:100dvh;overflow:hidden;background:var(--bg)}
#game{display:block;width:100%;height:100%;touch-action:none;cursor:pointer}
.screen{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  padding:calc(20px + var(--safe-top)) 16px calc(20px + var(--safe-bottom));
  background:rgba(18,12,36,.78);backdrop-filter:blur(6px);opacity:0;pointer-events:none;transition:opacity .25s ease;z-index:10}
.screen.active{opacity:1;pointer-events:auto}
.panel{width:min(380px,100%);padding:1.6rem 1.3rem;text-align:center;background:var(--panel);
  border:1px solid rgba(124,108,255,.35);border-radius:20px;box-shadow:0 0 36px rgba(124,108,255,.22)}
.lang-picker{display:flex;gap:6px;justify-content:center;margin-bottom:10px}
.lang-btn{min-width:44px;min-height:36px;border-radius:10px;border:1px solid rgba(124,108,255,.35);
  background:rgba(36,28,64,.85);color:var(--muted);font-weight:700;cursor:pointer}
.lang-btn.active{background:rgba(124,108,255,.28);color:#cfc6ff;border-color:var(--accent)}
.badge{font-size:.72rem;letter-spacing:.14em;color:var(--hot);font-weight:800;margin-bottom:.35rem}
h1{font-size:1.9rem;letter-spacing:.02em;margin-bottom:.25rem;
  background:linear-gradient(90deg,var(--accent),var(--hot));-webkit-background-clip:text;background-clip:text;color:transparent}
.tagline{color:var(--muted);font-size:.95rem;margin-bottom:.4rem}
.ver-badge{display:inline-block;font-size:.7rem;color:var(--accent);border:1px solid rgba(124,108,255,.4);
  padding:2px 8px;border-radius:999px;margin-bottom:.8rem}
.howto{text-align:left;margin:0 auto .9rem;padding-left:1.2rem;color:var(--muted);font-size:.82rem;line-height:1.45;max-width:320px}
.howto li{margin-bottom:.25rem}
.btn{display:inline-flex;align-items:center;justify-content:center;width:100%;min-height:48px;margin-top:8px;
  border:none;border-radius:14px;font-weight:800;font-size:1rem;cursor:pointer;text-decoration:none;color:var(--text)}
.btn-play,.btn-primary{background:linear-gradient(135deg,var(--accent),#5a4ad4);color:#fff;box-shadow:0 0 20px rgba(124,108,255,.4)}
.btn-ghost{background:rgba(40,32,70,.75);border:1px solid rgba(154,143,184,.35);color:var(--muted)}
.btn-tip{background:rgba(255,107,203,.14);border:1px solid rgba(255,107,203,.45);color:var(--hot);font-size:.9rem}
.hint{margin-top:10px;color:var(--muted);font-size:.85rem}
.studio{margin-top:8px;font-size:.7rem;letter-spacing:.12em;color:#6a5f88;text-transform:uppercase}
.result{font-size:2rem;margin:.4rem 0;color:var(--accent)}
.result-sub,.result-best{color:var(--muted);margin:.2rem 0}
.new-record{color:var(--ok);font-weight:800;margin:.5rem 0}
.new-record.hidden{display:none}
.hud{position:absolute;top:0;left:0;right:0;padding:calc(10px + var(--safe-top)) 12px 0;z-index:5;pointer-events:none}
.hud.hidden{display:none}
.hud-row{display:flex;justify-content:space-between;gap:8px}
.hud-block{background:rgba(26,21,48,.72);border:1px solid rgba(124,108,255,.28);border-radius:12px;padding:6px 10px;min-width:72px;text-align:center}
.hud-label{display:block;font-size:.65rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.hud-block span:last-child{font-weight:800;font-variant-numeric:tabular-nums}
.drop-hint{text-align:center;margin-top:12px;font-size:.9rem;font-weight:700;color:var(--warn);
  text-shadow:0 0 12px rgba(255,211,107,.45);opacity:.9}
#float-host{position:absolute;left:50%;top:38%;transform:translate(-50%,-50%);pointer-events:none;width:92vw;text-align:center}
.float-msg{position:absolute;left:50%;transform:translateX(-50%);font-weight:900;font-size:1.45rem;color:var(--hot);
  text-shadow:0 0 16px rgba(255,107,203,.55);animation:floatUp 1s ease-out forwards;white-space:nowrap}
.float-msg.perfect{color:var(--warn);font-size:1.7rem}
@keyframes floatUp{0%{opacity:1;transform:translate(-50%,0)}100%{opacity:0;transform:translate(-50%,-42px)}}
#pause-overlay{position:absolute;inset:0;display:none;align-items:center;justify-content:center;background:rgba(12,8,28,.78);z-index:20}
#pause-overlay.show{display:flex}
.pause-panel{background:var(--panel);border:1px solid rgba(124,108,255,.35);border-radius:18px;padding:1.4rem 1.6rem;text-align:center;min-width:240px}
.pause-stats{color:var(--muted);margin:.5rem 0;font-size:.9rem}
#pause-hint{color:var(--muted);font-size:.8rem;margin-bottom:.6rem}
.pause-btn{pointer-events:auto;position:absolute;right:12px;top:calc(78px + var(--safe-top));width:44px;height:44px;border-radius:12px;
  border:1px solid rgba(124,108,255,.45);background:rgba(26,21,48,.65);color:var(--accent);font-weight:900;cursor:pointer;font-size:1rem}