:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#1c1c1a;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:calc(100vh - 48px);display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.home{font-size:13px;color:var(--ink-2);text-decoration:none}
.home:hover{color:var(--ink)}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer}
.btn:hover{background:var(--hover)}
.btn:disabled{opacity:.4;cursor:default}
.btn:disabled:hover{background:transparent}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.text-input{height:40px;padding:0 12px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font:inherit;font-size:14px;color:var(--ink)}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 게임 공통 셸 ---------- */
.actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.btn--accent{background:var(--accent);color:#fff;border:none;font-weight:500}
.btn--accent:hover{background:var(--accent);filter:brightness(1.08)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.game{flex:1;display:flex;flex-wrap:wrap;align-items:stretch;min-height:0}
.stage{flex:999 1 420px;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:40px 28px}
.side{flex:1 1 300px;min-width:0;max-width:100%;border-left:1px solid var(--line);background:var(--panel);padding:28px 24px 40px;display:flex;flex-direction:column;gap:28px}
.group{display:flex;flex-direction:column;gap:12px}
.group + .group{border-top:1px solid var(--line-3);padding-top:24px}
.rules{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-2);line-height:1.6;counter-reset:rule}
.rules li{display:flex;gap:10px}
.rules li::before{counter-increment:rule;content:counter(rule,decimal-leading-zero);font-family:var(--mono);font-size:11px;color:var(--accent);padding-top:3px;flex-shrink:0}
.keys{display:flex;flex-direction:column;gap:8px;font-size:12px;color:var(--ink-2)}
.keys div{display:flex;justify-content:space-between;align-items:center;gap:12px}
.kbd{display:inline-block;font-family:var(--mono);font-size:11px;line-height:1.4;padding:1px 6px;border:1px solid var(--line-2);border-bottom-width:2px;border-radius:5px;background:var(--surface);color:var(--ink)}
.best-card{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:16px;border-radius:12px;background:var(--panel-soft)}
.best-val{font-family:var(--mono);font-size:28px;font-weight:500;letter-spacing:-.02em}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{flex:1;height:30px;padding:0 10px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-size:12px;cursor:pointer;white-space:nowrap}
.seg-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.link-btn{padding:0;background:none;border:none;font-size:12px;color:var(--muted);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
@media (max-width:640px){
  .stage{padding:24px 16px}
  .side{border-left:none;border-top:1px solid var(--line);padding:24px 16px 40px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}


/* ---------- 4키 리듬 게임 (네온 클럽) ---------- */
:root{--accent:#e2389a;--club:#130a2b;--club-2:#1f1342;--club-line:#33255f;--song:#ff8cc6;--pink:#ff5fa8;--cyan:#5ce1ff}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.stage{gap:12px;background:radial-gradient(80% 60% at 50% 20%,#f1e6f7 0%,var(--bg) 70%)}
.deck{width:min(100%,460px);border-radius:26px;background:var(--club);color:#efeaff;box-shadow:0 0 0 1px var(--club-line),0 34px 70px -30px rgba(226,56,154,.6);overflow:hidden}
.btn--ghost{border-color:rgba(255,255,255,.25);color:#efeaff}
.btn--ghost:hover{background:rgba(255,255,255,.08)}
.btn--big{height:52px;font-size:16px;width:100%;display:flex;align-items:center;justify-content:center;gap:10px}
.kbd--inv{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.3);color:#fff}

/* 곡 선택 */
.select{display:flex;flex-direction:column;gap:16px;padding:22px 20px 22px}
.select-head{display:flex;flex-direction:column;gap:6px}
.select-head .mono-label{color:var(--cyan);font-weight:700}
.select-head p{margin:0;font-size:12.5px;line-height:1.6;color:#b9b0dd;word-break:keep-all}
.tracks{display:flex;flex-direction:column;gap:10px}
.track{--c:#fff;position:relative;display:grid;grid-template-columns:1fr auto;grid-template-areas:"diff best" "title best" "meta meta";gap:3px 10px;width:100%;padding:14px 16px 13px 20px;border-radius:16px;border:1px solid var(--club-line);background:var(--club-2);text-align:left;cursor:pointer;color:#efeaff;transition:transform .15s,border-color .15s,background .15s}
.track::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:4px;border-radius:0 4px 4px 0;background:var(--c);opacity:.5}
.track:hover{border-color:#4a3a85}
.track.is-sel{border-color:var(--c);background:linear-gradient(100deg,rgba(255,255,255,.07),rgba(255,255,255,0));box-shadow:0 0 0 1px var(--c),0 10px 30px -14px var(--c);transform:translateX(3px)}
.track.is-sel::before{opacity:1}
.track:focus-visible{outline:2px solid #fff;outline-offset:2px}
.track-diff{grid-area:diff;font-family:var(--mono);font-size:10.5px;font-weight:800;letter-spacing:.16em;color:var(--c);display:flex;gap:8px;align-items:center}
.track-diff i{font-style:normal;letter-spacing:0;font-size:11px}
.track-diff em{font-style:normal;opacity:.25}
.track-title{grid-area:title;font-size:18px;font-weight:700;letter-spacing:-.02em}
.track-meta{grid-area:meta;font-family:var(--mono);font-size:10.5px;color:#8f86b8;letter-spacing:.04em}
.track-best{grid-area:best;align-self:center;display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;color:#b9b0dd;white-space:nowrap}
.track-best b{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:7px;background:rgba(255,255,255,.1);font-size:13px;color:#fff}
.settings{display:flex;flex-direction:column;gap:12px;padding:14px;border-radius:16px;background:rgba(255,255,255,.04)}
.set-row{display:flex;flex-direction:column;gap:6px}
.set-label{font-size:12px;color:#b9b0dd}
.set-head{display:flex;justify-content:space-between;align-items:center;gap:8px}
.settings .tb-num{color:#fff}
.settings .tb-num-wrap{color:#b9b0dd}
.settings .seg{background:rgba(255,255,255,.07)}
.settings .seg-btn{color:#b9b0dd;font-size:11.5px;padding:0 6px}
.settings .seg-btn.is-active{background:#fff;color:var(--club)}
input[type="range"]{width:100%;accent-color:var(--accent)}

/* 플레이 */
.play{display:flex;flex-direction:column}
.play-top{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;padding:14px 16px 10px}
.now-song{display:flex;flex-direction:column;gap:2px;min-width:0}
.now-song .mono-label{color:var(--song);font-weight:700;font-size:10px}
.now-song b{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.now-score{display:flex;flex-direction:column;align-items:flex-end;gap:2px}
.now-score .mono-label{font-size:10px;color:#8f86b8}
.now-score b{font-family:var(--mono);font-size:20px;font-variant-numeric:tabular-nums}
.progress{height:3px;background:rgba(255,255,255,.08)}
.progress span{display:block;height:100%;width:0;background:var(--song)}
.field{position:relative;height:min(600px,calc(100vh - 290px));min-height:380px;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}
.field canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.judge{position:absolute;left:0;right:0;top:38%;text-align:center;font-family:var(--mono);font-weight:800;font-size:clamp(24px,7vw,32px);letter-spacing:.06em;pointer-events:none;opacity:0}
.judge small{display:block;font-size:11px;letter-spacing:.2em;opacity:.8;margin-top:2px}
.judge.is-on{animation:judge .45s ease-out forwards}
@keyframes judge{0%{opacity:1;transform:scale(1.25)}25%{transform:scale(1)}80%{opacity:1}100%{opacity:0;transform:translateY(-6px)}}
.j-perfect{color:#fff6a8;text-shadow:0 0 18px rgba(255,246,168,.7)}
.j-great{color:var(--cyan);text-shadow:0 0 14px rgba(92,225,255,.6)}
.j-good{color:#9be38b}
.j-miss{color:#ff6b7d}
.combo{position:absolute;left:0;right:0;top:22%;display:flex;flex-direction:column;align-items:center;pointer-events:none;opacity:0;transition:opacity .2s}
.combo.is-on{opacity:.9}
.combo b{font-family:var(--mono);font-size:clamp(34px,10vw,46px);font-weight:800;line-height:1;color:#fff}
.combo span{font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:#b9b0dd}
.combo.pulse b{animation:pulse .15s ease-out}
@keyframes pulse{from{transform:scale(1.12)}}
.pause-layer{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:rgba(19,10,43,.82);backdrop-filter:blur(4px);text-align:center}
.pause-layer .mono-label{color:var(--cyan);font-weight:700}
.pause-layer strong{font-size:24px}
.pause-actions{display:flex;gap:8px}

/* 결과 */
.result{display:flex;flex-direction:column;align-items:center;gap:14px;padding:26px 20px 24px;text-align:center}
.result > .mono-label{color:var(--cyan);font-weight:700}
.rank{font-family:var(--mono);font-weight:800;font-size:96px;line-height:1;letter-spacing:-.04em;background:linear-gradient(180deg,#fff,var(--song));-webkit-background-clip:text;background-clip:text;color:transparent;animation:rankin .5s cubic-bezier(.2,1.5,.4,1)}
.rank[data-rank="S"]{background-image:linear-gradient(180deg,#fff6a8,#ff9f1c)}
.rank[data-rank="D"]{background-image:linear-gradient(180deg,#d6d0f0,#7d74a8)}
@keyframes rankin{from{transform:scale(.4);opacity:0}}
.res-title{font-size:16px}
.res-badges{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;min-height:0}
.badge{padding:4px 10px;border-radius:999px;font-family:var(--mono);font-size:10.5px;font-weight:800;letter-spacing:.14em}
.badge--ap{background:linear-gradient(90deg,#ff5fa8,#ffd23f,#5ce1ff);color:var(--club)}
.badge--fc{background:var(--cyan);color:var(--club)}
.badge--new{background:#fff;color:var(--accent)}
.res-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;width:100%}
.res-grid div{display:flex;flex-direction:column;gap:2px;padding:10px 6px;border-radius:12px;background:rgba(255,255,255,.06)}
.res-grid .mono-label{font-size:9.5px;color:#8f86b8}
.res-grid b{font-family:var(--mono);font-size:16px}
.res-judges{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;width:100%}
.res-judges div{display:flex;flex-direction:column;gap:2px;padding:8px 4px;border-radius:10px;border:1px solid var(--club-line);font-family:var(--mono)}
.res-judges span{font-size:10px;font-weight:700}
.res-judges b{font-size:18px;color:#fff}
.res-best{margin:0;font-size:12.5px;color:#b9b0dd}
.res-actions{display:flex;gap:8px}

.touch-hint{display:none;font-size:12px;color:var(--muted);text-align:center}
.app[data-state="playing"] .touch-hint{display:block}
@media (hover:hover) and (pointer:fine){ .touch-hint{display:none !important} }
.rank-table{display:flex;flex-direction:column;gap:6px;font-size:12.5px;color:var(--ink-2)}
.rank-table div{display:flex;align-items:center;gap:10px}
.rank-table b{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:7px;background:var(--club);color:#fff;font-family:var(--mono);font-size:12px}
.rank-table b[data-rank="S"]{background:linear-gradient(135deg,#ffd23f,#ff8c1c)}
.side-note{margin:0;font-size:12px;color:var(--muted);line-height:1.6}
@media (max-width:640px){
  .stage{padding:16px 16px 24px}
  .deck{border-radius:20px}
  .select{padding:18px 14px}
  .track{padding:12px 12px 11px 16px}
  .track-title{font-size:16px}
  .field{height:calc(100svh - 200px);min-height:420px;max-height:640px}
  .rank{font-size:80px}
}

/* 다크 모드 (인쇄는 라이트 그대로): 덱은 원래 네온 클럽이라 테두리만 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#15121c; --surface:#1b1823; --panel:#201d29; --panel-soft:#25222f;
    --ink:#eeeaf3; --ink-hover:#ffffff; --ink-2:#cbc5d6; --sub:#a39dae; --muted:#8d8799;
    --line:#2f2b3a; --line-2:#3a3646; --line-3:#272430; --hover:#2b2835; --soft:#272430; --track:#363243;
    --accent:#f05aae;
  }
  :root[data-theme="dark"] .btn--solid{color:var(--bg)}
  :root[data-theme="dark"] .btn--accent{background:#e2389a}
  :root[data-theme="dark"] .seg-btn.is-active{background:var(--track);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .settings .seg-btn.is-active{background:#cdc4f2;color:var(--club)}
  :root[data-theme="dark"] .stage{background:radial-gradient(80% 60% at 50% 20%,#2a1734 0%,var(--bg) 70%)}
  :root[data-theme="dark"] .deck{box-shadow:0 0 0 1px #45357a,0 34px 70px -30px rgba(226,56,154,.4)}
  :root[data-theme="dark"] .rank-table b{box-shadow:inset 0 0 0 1px var(--club-line)}
}