/* Layout: portrait game held in both hands. HUD, falling-note stage, four thumb pads.
   Menus and results are solid full screens; only the pause sheet lets the frozen game show through. */
:root{
  --bg:#0e1b22;        /* ink teal */
  --bg2:#08131a;       /* stage top */
  --panel:#13282f;
  --panel2:#1a3741;
  --line:#22434e;
  --key:#f4efe4;       /* falling keys, primary text */
  --muted:#8ea8ae;
  --miss:#e25d6f;      /* rose */
  --accent:#ff8f6b;    /* coral */
  --gold:#ffd27a;      /* perfect, fever */
  --mint:#7fdcc0;
  --display:"Young Serif", Georgia, "Times New Roman", serif;
  --ui:"Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  color-scheme:dark;
}
[hidden]{display:none!important}
html,body{height:100%}
body{margin:0;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{background:var(--bg);color:var(--key);font-family:var(--ui);overflow:hidden;
  -webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;touch-action:none;-webkit-touch-callout:none}
button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation}
select,input,label{touch-action:manipulation}
button:focus-visible,input:focus-visible,label:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------- game: two fixed full-screen canvases ---------- */
html,body{overflow:hidden;overscroll-behavior:none}
#game{position:fixed;top:0;right:0;bottom:0;left:0;overflow:hidden;touch-action:none;background:var(--bg);-webkit-user-select:none;user-select:none}
#game canvas{position:absolute;left:0;top:0;display:block}
#safe{position:fixed;top:0;right:0;bottom:0;left:0;visibility:hidden;pointer-events:none;
  padding:env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px)}
.icons{display:flex;gap:6px;flex:none}
.icon{width:38px;height:34px;border-radius:10px;border:1px solid var(--line);background:var(--panel);display:grid;place-items:center;padding:0}
.icon svg{width:16px;height:16px;fill:var(--key)}
.countdown{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;pointer-events:none;
  font:400 120px var(--display);color:var(--key);z-index:5}
.countdown.tick{animation:cd 1s ease-out forwards}
@keyframes cd{0%{transform:scale(1.35);opacity:0}18%{opacity:1}100%{transform:scale(.92);opacity:.25}}

/* ---------- solid screens ---------- */
.screen{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10;background:var(--bg);overflow-y:auto;overscroll-behavior:contain;touch-action:pan-y;
  padding-top:env(safe-area-inset-top, 0px);display:flex;flex-direction:column}
.wrap{width:100%;max-width:440px;margin:0 auto;box-sizing:border-box;display:flex;flex-direction:column;gap:20px;flex:1;
  padding-left:max(20px, env(safe-area-inset-left, 0px));padding-right:max(20px, env(safe-area-inset-right, 0px));padding-block:28px 24px}
.section{display:flex;flex-direction:column;gap:10px}
.section > h3 output{font:600 13px var(--mono);letter-spacing:0;text-transform:none;color:var(--key)}
.section > h3{margin:0;font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);
  display:flex;justify-content:space-between;align-items:baseline}
.chips{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:6px}
.chips button{padding:12px 2px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--muted);font-size:13px;font-weight:600}
.chips button[aria-pressed="true"]{background:var(--key);border-color:var(--key);color:var(--bg)}
.hint{font-size:12.5px;color:var(--muted);line-height:1.5;margin:0}
input[type=range]{width:100%;touch-action:pan-x;height:30px;margin:0;-webkit-appearance:none;appearance:none;background:transparent;--p:50%}
input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:3px;background:linear-gradient(90deg,var(--accent) var(--p),var(--panel2) var(--p))}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;margin-top:-10px;border-radius:50%;background:var(--key);border:4px solid var(--accent);box-sizing:border-box}
input[type=range]::-moz-range-track{height:6px;border-radius:3px;background:var(--panel2)}
input[type=range]::-moz-range-progress{height:6px;border-radius:3px;background:var(--accent)}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--key);border:4px solid var(--accent)}
.songs{max-height:300px;overflow-y:auto;border:1px solid var(--line);border-radius:12px;background:var(--panel);touch-action:pan-y}
.songs button{display:flex;justify-content:space-between;align-items:baseline;gap:10px;width:100%;background:none;border:0;
  border-bottom:1px solid var(--line);padding:13px 14px;font-size:14px;text-align:left}
.songs button:last-child{border-bottom:0}
.songs button span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.songs button small{color:var(--muted);font-size:12px;white-space:nowrap}
.songs button[aria-pressed="true"]{background:var(--panel2);box-shadow:inset 3px 0 0 var(--accent)}
.songs button[aria-pressed="true"] span{color:var(--accent);font-weight:700}
.songs .empty{padding:16px 14px;font-size:13px;color:var(--muted);line-height:1.5}
.vh{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.row{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:baseline;padding:11px 14px;border-bottom:1px solid var(--line);font-size:13px}
.row:last-child{border-bottom:0}
.row span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row b,.row em{font:500 13px var(--mono);font-style:normal;font-variant-numeric:tabular-nums}
.row em{color:var(--muted)}
.ghostbtn{background:none;border:1px solid var(--line);border-radius:12px;padding:12px;font-size:13px;font-weight:700;color:var(--key)}
.dock{position:sticky;bottom:0;background:var(--bg);border-top:1px solid var(--line);
  padding:12px max(20px, env(safe-area-inset-right, 0px)) calc(14px + env(safe-area-inset-bottom, 0px)) max(20px, env(safe-area-inset-left, 0px))}
.dock > div{max-width:440px;margin:0 auto;display:flex;flex-direction:column;gap:8px}
.play{width:100%;padding:17px;border-radius:14px;border:0;background:var(--accent);color:var(--bg);font-size:16px;font-weight:700;letter-spacing:.04em}
.second{width:100%;padding:15px;border-radius:14px;border:1px solid var(--line);background:var(--panel);font-size:15px;font-weight:700}

.top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.logo{font:400 40px/1 var(--display);margin:0;letter-spacing:-.01em}
.logo span{color:var(--accent)}
.title{font:400 32px/1 var(--display);margin:0}
.tabs{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:4px;gap:4px}
.tabs button{border:0;background:none;border-radius:10px;padding:12px 4px;font-size:14px;font-weight:700;color:var(--muted)}
.tabs button[aria-pressed="true"]{background:var(--key);color:var(--bg)}
.lede{margin:0;font-size:15px;line-height:1.55;color:var(--key);max-width:44ch;min-height:2.6em}
.lede small{display:block;color:var(--muted);font-size:13px;margin-top:4px}
.statline{margin:auto 0 0;font-size:12.5px;color:var(--muted);text-align:center}
.songs .load{display:block;padding:13px 14px;font-size:14px;color:var(--accent);font-weight:700;cursor:pointer;border-top:1px solid var(--line)}
.preview{border-radius:18px;border:1px solid var(--line);background:linear-gradient(180deg,var(--bg2),var(--panel));overflow:hidden;aspect-ratio:16/10;max-width:100%}
.preview svg{display:block;width:100%;height:100%}
.preview .keys{animation:fall 3.2s linear infinite}
@keyframes fall{from{transform:translateY(-200px)}to{transform:translateY(0)}}
@media (prefers-reduced-motion: reduce){.preview .keys{animation:none}}
.selwrap{position:relative}
.selwrap::after{content:"";position:absolute;right:16px;top:50%;width:8px;height:8px;margin-top:-6px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);pointer-events:none}
select{width:100%;-webkit-appearance:none;appearance:none;background:var(--panel);color:var(--key);border:1px solid var(--line);border-radius:12px;padding:13px 40px 13px 14px;font:600 15px var(--ui)}
.board{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:14px;background:var(--panel);overflow:hidden}
.brow{display:grid;grid-template-columns:30px 28px 1fr auto auto;gap:10px;align-items:center;padding:11px 14px;border-bottom:1px solid var(--line);font-size:14px}
.brow:last-child{border-bottom:0}
.brow .rk{font:600 15px var(--mono);color:var(--muted);text-align:center}
.brow.r1 .rk{color:var(--gold)}.brow.r2 .rk{color:var(--key)}.brow.r3 .rk{color:var(--accent)}
.brow img{width:28px;height:28px;border-radius:50%;display:block;background:var(--panel2)}
.brow .av{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font:700 13px var(--ui);font-style:normal;color:var(--bg);background:var(--panel2)}
.brow .nm{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}
.brow .nm small{display:block;font-weight:400;font-size:12px;color:var(--muted)}
.brow em{font:500 12px var(--mono);font-style:normal;color:var(--muted)}
.brow b{font:600 15px var(--mono);font-variant-numeric:tabular-nums}
.brow.me{background:var(--panel2);box-shadow:inset 3px 0 0 var(--accent)}
.brow.me .nm{color:var(--accent)}
.board .empty{padding:18px 14px;font-size:13.5px;color:var(--muted);line-height:1.5}
.nick{display:flex;gap:8px}
.nick input{flex:1;min-width:0;-webkit-user-select:text;user-select:text;background:var(--panel);border:1px solid var(--line);color:var(--key);border-radius:12px;padding:12px 14px;font:16px var(--ui)}
.nick button{border:0;border-radius:12px;padding:0 18px;background:var(--key);color:var(--bg);font-weight:700}
.rank-line{color:var(--gold)!important}
#records,#settings{z-index:11}
/* results */
.result-head{display:flex;align-items:center;gap:18px}
.grade{width:84px;height:84px;flex:none;border-radius:50%;display:grid;place-items:center;font:400 46px var(--display);
  border:2px solid currentColor;color:var(--gold)}
.result-head h2{margin:0;font:400 28px/1.15 var(--display);text-wrap:balance}
.result-head p{margin:6px 0 0;font:600 26px var(--mono);font-variant-numeric:tabular-nums}
.result-head small{display:block;margin-top:4px;font-size:12px;color:var(--muted)}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.tile{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:3px}
.tile b{font:600 19px var(--mono);font-variant-numeric:tabular-nums}
.tile small{font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.lanes{display:grid;grid-template-columns:1fr 1fr 10px 1fr 1fr;gap:8px;align-items:end;height:104px}
.lane{display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.lane .track{width:44%;min-width:28px;flex:1;border-radius:8px;background:var(--panel);border:1px solid var(--line);position:relative;overflow:hidden}
.lane .fill{position:absolute;left:0;right:0;bottom:0;background:var(--mint)}
.lane.weak .fill{background:var(--miss)}
.lane small{font:500 12px var(--mono);color:var(--muted)}

/* pause sheet: the only see-through layer */
.pause{position:fixed;top:0;right:0;bottom:0;left:0;z-index:12;display:flex;align-items:center;justify-content:center;
  background:rgba(14,27,34,.6);background:color-mix(in srgb, var(--bg) 60%, transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  padding-left:max(20px, env(safe-area-inset-left, 0px));padding-right:max(20px, env(safe-area-inset-right, 0px))}
.sheet{width:min(340px, 100%);box-sizing:border-box;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:24px;
  display:flex;flex-direction:column;gap:12px;box-shadow:0 24px 60px -20px #000}
.sheet h2{margin:0 0 4px;font:400 30px var(--display)}
.sheet p{margin:0 0 6px;color:var(--muted);font-size:13.5px;line-height:1.5}
@media (prefers-reduced-motion: reduce){.countdown.tick{animation:none}}

/* PC / Phone switch on the menu */
.devsw{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.devsw button{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:10px 14px;border-radius:12px;border:1px solid var(--line);background:var(--panel);color:var(--muted);text-align:left}
.devsw b{font-size:14px;font-weight:700}
.devsw small{font-size:12px;opacity:.85}
.devsw button[aria-pressed="true"]{border-color:var(--key);color:var(--key);box-shadow:inset 0 0 0 1px var(--key)}