:root{
  --bg:#080b14;
  --bg2:#0d1224;
  --panel:#121a30;
  --panel2:#1a2440;
  --line:rgba(125,211,252,.16);
  --text:#e2e8f0;
  --dim:#94a3b8;
  --accent:#38bdf8;
  --accent2:#f472b6;
  --gold:#fbbf24;
  --danger:#fb7185;
  --r:14px;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
html{background:var(--bg)}
body.app{
  min-height:100dvh;
  background:radial-gradient(1200px 700px at 50% -10%,#182347 0%,var(--bg) 60%);
  color:var(--text);
  font-family:system-ui,-apple-system,"Segoe UI","Hiragino Sans","Noto Sans JP",sans-serif;
  overscroll-behavior:none;
  padding-top:env(safe-area-inset-top);
  padding-bottom:env(safe-area-inset-bottom);
}

/* ---------- screens ---------- */
.screen{display:none;min-height:100dvh;flex-direction:column}
.screen.is-active{display:flex}
.screen-play{display:none;position:fixed;inset:0;background:#000}
.screen-play.is-active{display:block}

.stack{padding:24px 20px 48px;gap:18px;display:flex;flex-direction:column}
.center{align-items:center;justify-content:center;flex:1;text-align:center}

/* ---------- title ---------- */
.logo{
  font-size:clamp(44px,13vw,76px);
  font-weight:900;letter-spacing:-.04em;margin:0;
  background:linear-gradient(100deg,#7dd3fc,#f472b6 70%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 6px 30px rgba(244,114,182,.35));
}
.logo span{-webkit-text-fill-color:var(--gold);color:var(--gold)}
.tagline{color:var(--dim);margin:-6px 0 10px;font-size:15px;letter-spacing:.14em}

.btns{display:flex;flex-direction:column;gap:12px;width:min(420px,100%)}
.btns.row{flex-direction:row}
.btns.row .btn{flex:1}

.btn{
  appearance:none;border:1px solid var(--line);background:var(--panel);
  color:var(--text);font:inherit;font-weight:700;font-size:16px;
  padding:16px 18px;border-radius:var(--r);cursor:pointer;
  transition:transform .08s ease,background .15s ease,border-color .15s;
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn:hover{background:var(--panel2)}
.btn-primary{
  background:linear-gradient(120deg,#0ea5e9,#7c3aed);border-color:transparent;
  box-shadow:0 8px 26px rgba(56,189,248,.28);
}
.btn-primary:hover{background:linear-gradient(120deg,#38bdf8,#8b5cf6)}
.btn-ghost{background:transparent;color:var(--dim);border-color:transparent;font-weight:600}
.btn-ghost:hover{color:var(--text);background:rgba(255,255,255,.04)}
.btn[disabled]{opacity:.45;pointer-events:none}

.sound-toggle{
  margin-top:14px;background:none;border:none;color:var(--dim);
  font:inherit;font-size:13px;letter-spacing:.1em;cursor:pointer;padding:8px
}

/* ---------- topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:5;
  display:flex;align-items:center;gap:12px;
  padding:14px 16px;background:rgba(8,11,20,.86);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar h2{font-size:17px;margin:0;flex:1;text-align:center;font-weight:800}
.icon-btn{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  border:1px solid var(--line);background:var(--panel);color:var(--text);
  font-size:18px;line-height:1;cursor:pointer
}
.icon-btn.ghost{border-color:transparent;background:none;pointer-events:none}

/* ---------- stage list ---------- */
.group{display:block}
.group-title{
  display:flex;align-items:center;gap:8px;
  margin:18px 16px 0;font-size:13px;font-weight:800;color:var(--dim);letter-spacing:.06em
}
.reload-btn{
  margin-left:auto;width:30px;height:30px;border-radius:8px;
  border:1px solid var(--line);background:var(--panel);color:var(--dim);
  font-size:14px;line-height:1;cursor:pointer
}
.reload-btn:hover{color:var(--text)}
.no-thumb{
  position:absolute;inset:0;display:grid;place-items:center;
  background:var(--panel2);color:#475569;font-size:28px;font-weight:900
}

.list{display:grid;gap:12px;padding:16px;flex:1;align-content:start}
.card{
  position:relative;display:grid;grid-template-columns:96px 1fr;gap:12px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:12px;cursor:pointer;overflow:hidden;transition:border-color .15s,transform .08s
}
.card:active{transform:scale(.995)}
.card:hover{border-color:rgba(125,211,252,.4)}
/* サムネは「ブロックの格子越しに少し透けて見える」状態にする。
   真っ暗だと何のステージか分からず遊ぶ動機にならないので、
   色と構図までは見せて、細部は分からない程度に留める。 */
.card-thumb{position:relative;width:96px;height:96px;border-radius:10px;overflow:hidden;background:#0b1020}
.card-thumb img{
  width:100%;height:100%;object-fit:cover;
  filter:blur(2.5px) saturate(1.25) contrast(1.05);
  transform:scale(1.06)
}
.thumb-veil{
  position:absolute;inset:0;
  /* 格子＝ブロックの目地。ベタ塗りではなく線だけ乗せる */
  background:
    repeating-linear-gradient(0deg,rgba(8,12,24,.62) 0 2px,transparent 2px 12px),
    repeating-linear-gradient(90deg,rgba(8,12,24,.62) 0 2px,transparent 2px 12px),
    linear-gradient(rgba(8,12,24,.30),rgba(8,12,24,.44));
}
.card-body{min-width:0;display:flex;flex-direction:column;gap:5px;justify-content:center}
.card-title{font-weight:800;font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card-author{color:var(--accent);font-size:12px}
.card-meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--dim);font-size:12px;align-items:center}
.card-rec{font-size:12px;color:var(--gold);font-weight:700}
.card-rec.dim{color:#475569;font-weight:500}
.card-del{
  position:absolute;top:8px;right:8px;width:28px;height:28px;border-radius:8px;
  background:rgba(0,0,0,.4);border:1px solid var(--line);color:var(--dim);cursor:pointer;font-size:12px
}
.card-del:hover{color:var(--danger);border-color:var(--danger)}

.tier{
  color:var(--tier,var(--accent));border:1px solid currentColor;border-radius:999px;
  padding:2px 9px;font-size:11px;font-weight:800;letter-spacing:.06em
}
.empty{color:var(--dim);text-align:center;padding:60px 20px;font-size:14px}
.hint{color:#64748b;font-size:12px;padding:0 20px 30px;line-height:1.8;text-align:center}
.hint code{background:var(--panel);padding:2px 6px;border-radius:6px;color:var(--accent)}
#screen-select.dropping{outline:2px dashed var(--accent);outline-offset:-10px}

/* ---------- play ---------- */
#game-canvas{display:block;width:100%;height:100%;touch-action:none}
.pause-btn{
  position:absolute;top:calc(10px + env(safe-area-inset-top));right:10px;
  width:44px;height:44px;border-radius:12px;
  background:rgba(18,26,48,.75);border:1px solid var(--line);color:var(--text);
  font-size:15px;cursor:pointer;z-index:2
}

/* ---------- result ---------- */
.result-wrap{padding:24px 18px 44px;max-width:520px;margin:0 auto;width:100%;display:flex;flex-direction:column;gap:16px}
.result-head{display:flex;align-items:center;gap:16px}
.rank{
  width:84px;height:84px;flex:0 0 84px;border-radius:20px;
  display:grid;place-items:center;font-size:48px;font-weight:900;
  color:var(--rank,var(--gold));border:2px solid var(--rank,var(--gold));
  box-shadow:0 0 40px color-mix(in srgb,var(--rank,#fbbf24) 40%,transparent);
  background:rgba(0,0,0,.3)
}
.result-title{font-size:26px;font-weight:900;letter-spacing:.02em}
.result-sub{color:var(--dim);font-size:13px;margin-top:4px}

.reward{position:relative;border-radius:var(--r);overflow:hidden;background:#000;cursor:zoom-in}
.reward img{display:block;width:100%;max-height:52dvh;object-fit:contain}
.reward.locked img{filter:blur(18px) brightness(.55);transform:scale(1.06)}
.reward.locked{cursor:default}
.reward-veil{
  position:absolute;inset:auto 0 0 0;padding:10px;text-align:center;
  background:linear-gradient(transparent,rgba(0,0,0,.75));
  font-size:12px;letter-spacing:.18em;color:#cbd5e1
}

.score-big{font-size:44px;font-weight:900;text-align:center;font-variant-numeric:tabular-nums}
.score-big small{font-size:16px;color:var(--dim);font-weight:700}
.cal-note{
  background:rgba(74,222,128,.10);border:1px solid rgba(74,222,128,.4);
  border-radius:10px;padding:12px 14px;font-size:13px;line-height:1.8;color:#d1fae5;text-align:center
}
.cal-note b{font-size:20px;color:#4ade80}
.newrec{
  text-align:center;color:var(--gold);font-weight:900;letter-spacing:.14em;
  animation:pop .5s ease infinite alternate
}
@keyframes pop{from{transform:scale(1)}to{transform:scale(1.06)}}

.stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0}
.stats>div{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.stats dt{color:var(--dim);font-size:11px;margin:0}
.stats dd{margin:3px 0 0;font-weight:800;font-size:15px;font-variant-numeric:tabular-nums}

/* ---------- howto ---------- */
.doc{padding:20px 20px 60px;max-width:640px;margin:0 auto;line-height:1.9;font-size:14px}
.doc h3{margin:28px 0 10px;font-size:16px;color:var(--accent)}
.doc h3:first-child{margin-top:6px}
.doc ul{padding-left:20px;margin:0;color:#cbd5e1}
.doc li{margin:6px 0}
.doc p{color:#cbd5e1;margin:8px 0}
.doc .small{color:#64748b;font-size:12px}
.formula{
  background:var(--panel);border:1px solid var(--line);border-radius:10px;
  padding:14px;text-align:center;font-weight:800;color:var(--gold)!important
}
.pw b{color:var(--accent2)}
.tier-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:12px}
.tier-table th,.tier-table td{border-bottom:1px solid var(--line);padding:9px 6px;text-align:left}
.tier-table th{color:var(--dim);font-weight:700}

/* ---------- toast / lightbox ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translateX(-50%);
  background:#1e293b;border:1px solid var(--line);color:var(--text);
  padding:12px 18px;border-radius:999px;font-size:13px;z-index:60;max-width:88vw;text-align:center;
  box-shadow:0 10px 40px rgba(0,0,0,.6)
}
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.94);z-index:70;display:grid;place-items:center;padding:16px}
.lightbox img{max-width:100%;max-height:100%;object-fit:contain;border-radius:8px}
.lightbox-close{
  position:absolute;top:calc(14px + env(safe-area-inset-top));right:14px;width:44px;height:44px;
  border-radius:50%;background:rgba(30,41,59,.9);border:1px solid var(--line);color:#fff;font-size:16px;cursor:pointer
}
[hidden]{display:none!important}