/* 파이프 연결 퍼즐 — 수도 배관 테마(자체 테마, 사이트 라이트/다크 모두 동일하게 보인다) */
#pf-game { position:relative; width:100%; max-width:100%; margin:0 auto; border:1px solid #2b3a4a; border-radius:20px; overflow:hidden; background:linear-gradient(180deg,#141b24,#0e131a); color:#e8f1f8; box-shadow:0 18px 45px rgba(8,20,35,.32); user-select:none; -webkit-user-select:none; }
#pf-game, #pf-game * { box-sizing:border-box; }
#pf-game [hidden] { display:none !important; }
#pf-game button { font-family:inherit; }
#pf-game button:focus-visible { outline:3px solid #7ce7ff; outline-offset:-3px; }

.pf-toolbar { display:flex; align-items:center; justify-content:space-between; gap:8px; padding:12px 16px; background:linear-gradient(110deg,#1d2835,#141b24); border-bottom:1px solid #ffffff12; }
.pf-brand { display:flex; align-items:center; gap:10px; font-weight:900; letter-spacing:.14em; font-size:.72rem; color:#7ce7ff; }
.pf-brand > i { font-size:22px; color:#57c9e8; }
.pf-brand small { display:block; margin-top:2px; font-size:.65rem; font-weight:600; color:#94a6b6; letter-spacing:.02em; }
#pf-sound { border:1px solid #ffffff30; background:#ffffff08; color:#d5e5ee; border-radius:8px; padding:8px 10px; font-size:.72rem; cursor:pointer; }

.pf-hud { display:grid; grid-template-columns:repeat(5,1fr); gap:6px; padding:12px 12px 8px; align-items:center; }
.pf-hud > div { text-align:center; border-left:1px solid #ffffff12; }
.pf-hud > div:first-child { border-left:0; }
.pf-hud small { display:block; font-size:.62rem; font-weight:600; color:#93a3b3; letter-spacing:.03em; }
.pf-hud strong { display:block; line-height:1.4; font-size:1.05rem; font-weight:800; font-variant-numeric:tabular-nums; }
.pf-hud .pf-scorebox strong { color:#7ce7ff; font-size:1.4rem; }
.pf-hud .pf-lives strong { font-size:.9rem; letter-spacing:-2px; }
#pf-time.warn { color:#ff7b7b; animation:pfWarn .55s ease-in-out infinite alternate; }
@keyframes pfWarn { from { opacity:1; transform:scale(1); } to { opacity:.55; transform:scale(1.08); } }

/* 진행바 = 물이 닿은 칸 비율. 칸 수 표시가 바 위에 떠 있어 overflow 를 자르지 않는다(막대에 직접 radius) */
.pf-track { position:relative; margin:12px 16px 14px; height:6px; border-radius:3px; background:#080c11; }
#pf-progress { display:block; height:100%; width:0; border-radius:3px; background:linear-gradient(90deg,#2f8fb8,#7ce7ff); transition:width .25s ease; box-shadow:0 0 12px #35b6dd66; }
.pf-trackcap { position:absolute; right:0; bottom:calc(100% + 4px); font-size:.62rem; font-weight:800; color:#8fb6c8; font-variant-numeric:tabular-nums; }

#pf-stage { position:relative; margin:0 12px; padding:14px 12px 10px; border:1px solid #ffffff14; border-radius:14px; background:radial-gradient(120% 90% at 50% 0%,#20303e 0%,#101720 100%); }

/* 판 : 칸마다 버튼 하나. 회전은 안쪽 .pf-rotor 의 transform 이 맡는다. */
#pf-board { display:grid; grid-template-columns:repeat(var(--pf-cols,6),1fr); gap:3px; width:100%;
    max-width:min(100%, 540px, max(260px, calc((100dvh - 330px) * var(--pf-cols,6) / var(--pf-rows,6))));
    aspect-ratio:var(--pf-cols,6) / var(--pf-rows,6); margin:0 auto; padding:5px;
    border-radius:12px; background:#0a1016; box-shadow:inset 0 0 0 2px #22303d, 0 6px 20px #0006; touch-action:manipulation; }
@supports not (aspect-ratio:1/1) { #pf-board { max-width:min(100%,540px); } }

.pf-cell { position:relative; display:block; width:100%; height:100%; min-width:0; min-height:0; padding:0;
    border:0; border-radius:7px; background:#16202a; cursor:pointer; overflow:visible;
    transition:background .18s ease; -webkit-tap-highlight-color:transparent; }
.pf-cell:hover { background:#1d2a36; }
.pf-cell.wet { background:#12303c; }
.pf-rotor { display:block; width:100%; height:100%; transition:transform .17s cubic-bezier(.3,1.5,.5,1); }
.pf-pipe { display:block; width:100%; height:100%; overflow:visible; }
.pf-ink line { stroke:#56697c; stroke-width:21; stroke-linecap:round; fill:none; transition:stroke .18s ease; }
.pf-hub { fill:#56697c; transition:fill .18s ease; }
.pf-cap { fill:#56697c; stroke:#3b4a59; stroke-width:5; transition:fill .18s ease,stroke .18s ease; }
.pf-cell.wet .pf-ink line { stroke:#3fd2f7; }
.pf-cell.wet .pf-hub { fill:#8ceaff; }
.pf-cell.wet .pf-cap { fill:#8ceaff; stroke:#2aa6c9; }
.pf-cell.wet .pf-pipe { filter:drop-shadow(0 0 4px #3fd2f7aa); }
.pf-cell.just .pf-pipe { animation:pfSplash .42s ease-out; }
@keyframes pfSplash { 0% { filter:drop-shadow(0 0 0 #fff0) brightness(2.2); transform:scale(1.14); } 100% { filter:drop-shadow(0 0 4px #3fd2f7aa) brightness(1); transform:scale(1); } }

/* 수원(수도꼭지) 칸 */
.pf-cell.src { background:#243043; }
.pf-cell.src.wet { background:#1d4152; }
.pf-valve { position:absolute; inset:0; pointer-events:none; }
.pf-valve::before { content:''; position:absolute; left:50%; top:50%; width:46%; height:46%; transform:translate(-50%,-50%); border-radius:50%; border:2px solid #ffd479; box-shadow:0 0 10px #ffd47955; }
.pf-valve::after { content:''; position:absolute; left:50%; top:50%; width:16%; height:16%; transform:translate(-50%,-50%); border-radius:50%; background:#ffd479; }

#pf-stage.done #pf-board { box-shadow:inset 0 0 0 2px #3fd2f7, 0 0 32px #3fd2f755; }
#pf-hint { margin:12px 6px 0; text-align:center; font-size:.74rem; font-weight:600; color:#a3b3c2; min-height:18px; }

.pf-controls { display:flex; gap:8px; padding:12px; }
.pf-controls button { flex:1; min-width:0; min-height:52px; border-radius:10px; border:1px solid #ffffff2b; background:linear-gradient(160deg,#263442,#18212b); color:#e8f1f8; font-size:.88rem; font-weight:800; cursor:pointer; touch-action:manipulation; box-shadow:0 3px 0 #0a0f14; transition:transform .08s,filter .08s; }
.pf-controls button:active { transform:translateY(2px); box-shadow:0 1px 0 #0a0f14; filter:brightness(1.15); }
.pf-controls button:disabled { opacity:.38; cursor:default; box-shadow:none; }
.pf-controls button small { display:block; margin-top:3px; font-size:.62rem; font-weight:600; opacity:.7; }
#pf-giveup { flex:0 0 88px; background:linear-gradient(160deg,#33252f,#20161d); border-color:#d59ec03d; }

#pf-toast { position:absolute; left:50%; bottom:86px; transform:translate(-50%,10px); z-index:11; max-width:86%; padding:9px 15px; border-radius:999px; background:#080c11e8; border:1px solid #ffffff2b; color:#e8f1f8; font-size:.76rem; font-weight:700; text-align:center; opacity:0; pointer-events:none; transition:opacity .18s,transform .18s; }
#pf-toast.on { opacity:1; transform:translate(-50%,0); }

.pf-overlay { position:absolute; inset:0; z-index:12; display:none; align-items:center; justify-content:center; padding:22px; background:linear-gradient(180deg,#080c11aa,#080c11e8 45%); }
.pf-overlay.on { display:flex; }
.pf-panel { width:100%; max-width:400px; max-height:100%; overflow:auto; text-align:center; padding:26px 20px; border:1px solid #ffffff2b; border-radius:16px; background:linear-gradient(155deg,#1f2b38f2,#121920f7); box-shadow:0 16px 45px #04091266; }
.pf-eyebrow { display:inline-block; font-size:.66rem; font-weight:700; letter-spacing:.12em; color:#7ce7ff; margin-bottom:10px; }
.pf-panel h2 { margin:0 0 12px; font-size:1.32rem; font-weight:900; color:#fff; }
.pf-panel p { margin:0 0 16px; font-size:.86rem; line-height:1.65; color:#c2d1dd; }
.pf-panel p b { color:#7ce7ff; }
.pf-panel small { color:#8fa0b0; }
.pf-primary { width:100%; min-height:52px; margin-top:6px; border:0; border-radius:12px; background:linear-gradient(135deg,#2bb6dd,#7ce7ff); color:#06222c; font-size:1rem; font-weight:900; cursor:pointer; box-shadow:0 4px 0 #1a6b85; }
.pf-primary:active { transform:translateY(2px); box-shadow:0 2px 0 #1a6b85; }

/* 인트로 미니 도해 — 엘보 관이 한 번 돌아 물길이 이어지는 모습 */
.pf-demo { display:flex; justify-content:center; gap:6px; margin:2px auto 16px; }
.pf-demo i { display:block; width:40px; height:40px; border-radius:7px; background:#16202a; position:relative; }
.pf-demo i::before { content:''; position:absolute; left:50%; top:50%; width:10px; height:calc(50% + 5px); transform:translate(-50%,-50%); }
.pf-demo i:nth-child(1)::before { background:#3fd2f7; height:10px; width:calc(50% + 5px); left:auto; right:0; transform:translateY(-50%); top:50%; border-radius:5px 0 0 5px; }
.pf-demo i:nth-child(2)::before { background:#3fd2f7; width:100%; height:10px; left:0; top:50%; transform:translateY(-50%); }
.pf-demo i:nth-child(3)::before { background:#56697c; width:10px; height:calc(50% + 5px); left:0; top:50%; transform:none; border-radius:0 0 5px 5px; animation:pfDemo 2.4s ease-in-out infinite; transform-origin:5px 0; }
@keyframes pfDemo { 0%,30% { transform:rotate(0deg); background:#56697c; } 55%,100% { transform:rotate(-90deg); background:#3fd2f7; } }

#pf-newrecord { display:inline-block; margin-bottom:8px; padding:4px 12px; border-radius:999px; background:#7ce7ff; color:#04252f; font-size:.68rem; font-weight:900; letter-spacing:.08em; }
#pf-final { display:inline-block; font-size:3rem; font-weight:900; line-height:1.1; color:#7ce7ff; }
.pf-final-unit { font-size:1rem; font-weight:800; color:#7ce7ff; margin-left:3px; }
#pf-grade { margin:6px 0 4px; font-size:1.05rem; font-weight:900; color:#fff; }
#pf-detail { margin:10px 0 4px; font-size:.8rem; line-height:1.7; color:#b2c1cf; }
#pf-detail b { color:#7ce7ff; }

.pf-guide { text-align:left; line-height:1.7; margin-top:16px; }
.pf-guide h3 { font-size:1rem; margin:0 0 8px; }
.pf-guide p { font-size:.88rem; margin:0 0 8px; }
.pf-guide small { display:block; font-size:.78rem; opacity:.85; }

@media (max-width:420px) {
    .pf-hud { grid-template-columns:repeat(5,1fr); gap:3px; padding:10px 8px 6px; }
    .pf-hud strong { font-size:.92rem; }
    .pf-hud .pf-scorebox strong { font-size:1.2rem; }
    #pf-stage { margin:0 8px; padding:12px 6px 8px; }
    #pf-board { gap:2px; padding:4px; }
    .pf-controls { padding:10px 8px; gap:6px; }
    .pf-controls button { min-height:48px; font-size:.82rem; }
    #pf-giveup { flex:0 0 74px; }
    .pf-ink line { stroke-width:24; }
}

@media (prefers-reduced-motion:reduce) {
    .pf-rotor { transition:none; }
    .pf-cell.just .pf-pipe { animation:none; }
    #pf-time.warn { animation:none; }
    .pf-demo i:nth-child(3)::before { animation:none; transform:rotate(-90deg); background:#3fd2f7; }
}

/* ── PC(≥860px) 2단 배치 — 판은 왼쪽, HUD·진행바·버튼은 오른쪽 세로 열 ── */
@media (min-width:860px) {
    #pf-game { display:grid; grid-template-columns:minmax(0,1fr) 300px; grid-template-rows:auto auto auto minmax(0,1fr);
        grid-template-areas:"tb tb" "st hud" "st tr" "st ct"; }
    .pf-toolbar { grid-area:tb; }
    #pf-stage { grid-area:st; margin:12px 0 12px 12px; padding:14px; display:flex; flex-direction:column; justify-content:center; }
    #pf-board { max-width:min(100%, 470px); }
    .pf-hud { grid-area:hud; grid-template-columns:1fr 1fr; gap:8px; padding:14px 14px 6px 12px; align-content:start; }
    .pf-hud > div { border-left:0; padding:9px 6px 8px; border-radius:10px; background:#ffffff08; border:1px solid #ffffff10; }
    .pf-hud .pf-scorebox { grid-column:1 / -1; padding:10px 6px; }
    .pf-hud strong { font-size:1.12rem; }
    .pf-hud .pf-scorebox strong { font-size:1.7rem; }
    .pf-hud .pf-lives strong { font-size:1rem; }
    .pf-track { grid-area:tr; margin:20px 14px 8px 12px; }
    .pf-controls { grid-area:ct; flex-direction:column; align-self:end; gap:8px; padding:8px 14px 14px 12px; }
    .pf-controls button { flex:0 0 auto; min-height:52px; }
    #pf-giveup { flex:0 0 auto; }
}