:root{--ink:#0d0f12;--panel:#16191f;--line:#2a2f38;--text:#e8eaee;--dim:#7d8592;--go:#ffd60a;--danger:#ff453a;--go-ink:var(--go);--content:560px;--sp-1:6px;--sp-2:10px;--sp-3:14px;--sp-4:18px;--sp-5:24px;--sp-6:32px;--sp-7:40px;--radius:16px}.stack{gap:var(--stack-gap,var(--sp-4));flex-direction:column;display:flex}.stack-sm{--stack-gap:var(--sp-2)}.stack-lg{--stack-gap:var(--sp-6)}.l-header{gap:var(--sp-2);flex-direction:column;align-items:flex-start;display:flex}.stack>.sec-label{margin-bottom:0}:root[data-theme=light]{--ink:#f4f6f9;--panel:#fff;--line:#e3e7ee;--text:#1b1e24;--dim:#5c6675;--go-ink:#8a6800}:root[data-theme=light] #topbar{background:#f4f6f9eb}:root[data-theme=light] .btn{background:#eceff4}:root[data-theme=light] .toggle button.on{background:#e4e8ef}:root[data-theme=light] select,:root[data-theme=light] input[type=text]{background:#eef1f6}:root[data-theme=light] .explain,:root[data-theme=light] .success,:root[data-theme=light] 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var(--line);border-radius:10px;flex-shrink:0;display:flex;overflow:hidden}.toggle button{color:var(--dim);cursor:pointer;background:0 0;border:none;padding:8px 12px;font-size:12px;font-weight:600}.toggle button.on{color:var(--text);background:#22262e}.switch{background:var(--line);cursor:pointer;border-radius:999px;flex-shrink:0;width:46px;height:26px;transition:background .15s;position:relative}.switch:after{content:"";background:#fff;border-radius:50%;width:20px;height:20px;transition:left .15s;position:absolute;top:3px;left:3px}.switch.on{background:var(--go)}.switch.on:after{left:23px}select,input[type=text]{border:1px solid var(--line);color:var(--text);background:#1d2027;border-radius:10px;padding:8px 10px;font-size:13px}.btn{cursor:pointer;color:var(--text);background:#22262e;border:none;border-radius:12px;padding:10px 14px;font-size:13px;font-weight:700}.btn.ghost{border:1px solid var(--line);color:var(--dim);background:0 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var(--line);white-space:nowrap;border-radius:999px;padding:4px 10px;font-size:11px;font-weight:800}.session-play{padding:9px 22px}#sessionRest{background:var(--ink);text-align:center;z-index:58;flex-direction:column;padding:30px}.sess-next{letter-spacing:.28em;text-transform:uppercase;color:var(--dim);font-size:12px}.sess-name{letter-spacing:-.02em;color:var(--go-ink);margin-top:8px;font-size:min(11vw,44px);font-weight:800;line-height:1.1}.sess-setup{color:var(--text);max-width:440px;margin:14px auto 0;font-size:15px;line-height:1.5}.sess-count{font-variant-numeric:tabular-nums;margin-top:18px;font-size:min(20vw,88px);font-weight:800}#duel{z-index:57;background:#000;flex-direction:column;justify-content:stretch;align-items:stretch}.duel-half{background:var(--ink);touch-action:none;-webkit-user-select:none;user-select:none;flex:50%;justify-content:center;align-items:center;width:100%;display:flex;position:relative;overflow:hidden}#duelB{border-bottom:3px solid #000;transform:rotate(180deg)}#duelA{border-top:3px solid #000}.duel-score{text-align:center;pointer-events:none;font-variant-numeric:tabular-nums;color:#ffffff8c;font-size:min(15vw,64px);font-weight:800;position:absolute;bottom:6vh;left:0;right:0}.duel-main{pointer-events:none;text-align:center;color:#fff;padding:0 16px;font-size:min(16vw,110px);font-weight:800;line-height:1}.duel-half.cueAnim{animation:.18s ease-out duelFlash}@keyframes duelFlash{0%{filter:brightness(1.75)}to{filter:brightness()}}#duelWin{background:var(--ink);text-align:center;z-index:59;flex-direction:column;gap:24px;padding:30px}#duelWinText{letter-spacing:-.01em;font-size:min(11vw,48px);font-weight:800;line-height:1.1}.duel-win-btns{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}@media (width>=760px){:root{--content:860px}#modeCards{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;gap:14px;display:grid}#modeCards .bigcard{height:100%;margin-bottom:0}#home 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