:root{--bg:#0c1412;--bg-raised:#13201d;--card-bg:#ffffff0a;--card-border:#ffffff14;--panel-bg:#0c1412eb;--panel-bg-soft:#0c1412cc;--scrim:#060c0b9e;--scrim-soft:#060c0b80;--line:#ffffff1f;--line-soft:#ffffff1a;--shadow:#00000059;--shadow-strong:#0009;--text:#f2efe9;--text-strong:#fff;--text-title:#e7e0d4;--text-soft:#bcc7c0;--text-muted:#9aa8a2;--text-hint:#8d9b95;--text-faint:#7d8b85;--text-dim:#6e7b76;--accent:#ff7a5c;--accent-hover:#ff9478;--accent-contrast:#2b0d06;--accent-soft:#ff7a5c24;--accent-hover-soft:#ff7a5c3d;--accent-medium:#ff7a5c52;--accent-border:#ff7a5c80;--accent-faint:#ff7a5c0f;--accent-2:#ffc46b;--accent-2-light:#ffd89b;--accent-2-soft:#ffc46b24;--accent-3:#4fd1a5;--danger:#ff6b6b;--success:#4fd1a5;--warn:#ffc46b;--gold:#ffd166;--judge-perfect:#ffd166;--judge-great:#4fd1a5;--judge-good:#6fb5ff;--judge-miss:#ff5d5d;--radius-lg:.9rem;--radius-md:.6rem;--radius-sm:.45rem;--font-display:"Teko", "Rajdhani", "Segoe UI", system-ui, sans-serif;--font-body:"Rajdhani", "Segoe UI", system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{background:var(--bg);width:100%;height:100dvh;color:var(--text);font-family:var(--font-body);margin:0;padding:0;overflow:hidden}html,body{overscroll-behavior:none;-webkit-tap-highlight-color:transparent}#root{padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.center-msg{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:1rem;width:100%;height:100%;display:flex}.select-screen{padding:calc(3.4rem + env(safe-area-inset-top)) 1rem 3rem;touch-action:pan-y;justify-content:flex-start;overflow-y:auto}.app-title{justify-content:center;align-items:baseline;gap:.5rem;margin:0;display:flex}.app-title .app-title-en{font-family:var(--font-display);letter-spacing:.06em;color:var(--text);font-size:clamp(1.8rem,7vw,2.6rem);font-weight:600}.app-title .app-title-cn{font-family:var(--font-body);letter-spacing:.08em;color:var(--accent);font-size:clamp(1rem,3.2vw,1.2rem);font-weight:600}.subtitle{color:var(--text-muted);max-width:30rem;margin:0;font-size:clamp(.85rem,3vw,1rem)}button,input,select,textarea{font:inherit}.song-btn{border-radius:var(--radius-md);background:var(--accent-soft);color:var(--text);cursor:pointer;touch-action:manipulation;border:none;padding:.8rem 1.8rem;font-size:1.05rem;transition:background .15s,transform .15s}@media (hover:hover){.song-btn:hover:not(:disabled):not([aria-pressed=true]):not(.start){background:var(--accent-hover-soft);transform:translateY(-2px)}}.song-btn:disabled{opacity:.45;cursor:not-allowed}.song-btn.small{padding:.55rem 1.1rem;font-size:.95rem}.song-btn.start{background:var(--accent);color:var(--accent-contrast);font-weight:600}.song-btn.start:disabled{background:var(--line);color:var(--text-muted);opacity:1}.upload-panel{border:1px dashed var(--accent-border);background:var(--accent-faint);text-align:left;border-radius:.8rem;flex-direction:column;align-items:stretch;gap:.7rem;width:100%;max-width:34rem;padding:1rem;display:flex}.upload-panel label{color:var(--text-soft);flex-direction:column;flex:1;gap:.25rem;font-size:.9rem;display:flex}.upload-panel input:not([type=checkbox]),.upload-panel select,.upload-panel textarea{border:1px solid var(--accent-border);background:var(--bg-raised);width:100%;color:var(--text-strong);resize:vertical;border-radius:.45rem;padding:.5rem .65rem}.upload-row{justify-content:center;display:flex}.field-row{flex-wrap:wrap;gap:.7rem;display:flex}.field-row label{min-width:10rem}.difficulty-field{flex-direction:column;gap:.35rem;display:flex}.field-label{color:var(--text-soft);font-size:.9rem}.difficulty-segments{grid-template-columns:repeat(4,1fr);gap:.35rem;display:grid}.difficulty-segments button{border-radius:var(--radius-sm);background:var(--bg-raised);min-width:0;color:var(--text-muted);cursor:pointer;border:none;flex-direction:column;align-items:center;gap:.12rem;padding:.55rem .3rem;transition:background .18s,color .18s,transform .18s;display:flex}@media (hover:hover){.difficulty-segments button:hover{background:var(--accent-soft);transform:translateY(-1px)}}.difficulty-segments button.active{background:var(--accent-soft);color:var(--text)}.difficulty-segments button span{max-width:100%;color:var(--text-dim);text-overflow:ellipsis;white-space:nowrap;font-size:.72rem;overflow:hidden}.difficulty-segments button.active span{color:var(--accent)}.custom-difficulty{opacity:0;grid-template-rows:0fr;transition:grid-template-rows .2s,opacity .16s,transform .2s;display:grid;transform:translateY(-.2rem)}.custom-difficulty.open{opacity:1;grid-template-rows:1fr;transform:translateY(0)}.custom-difficulty>label{grid-template-columns:auto 1fr;min-height:0;display:grid;overflow:hidden}.custom-difficulty output{color:var(--accent);font-variant-numeric:tabular-nums;justify-self:end}.custom-difficulty input[type=range]{box-sizing:border-box;accent-color:var(--accent);grid-column:1/-1;padding:0}.difficulty-summary{color:var(--text-faint);font-size:.78rem}.upload-btn{text-overflow:ellipsis;white-space:nowrap;max-width:100%;overflow:hidden}.upload-estimate{color:var(--success);font-size:.85rem;line-height:1.4}.upload-estimate.warn{color:var(--warn)}.upload-estimate-note{color:var(--text-faint);font-size:.78rem;display:block}.link-btn{color:var(--accent);cursor:pointer;background:0 0;border:none;margin-left:.4rem;padding:0;text-decoration:underline}.difficulty-editor{background:var(--accent-faint);border:none;border-radius:.6rem;flex-direction:column;grid-column:1/-1;gap:.6rem;padding:.7rem;display:flex}.difficulty-editor .custom-difficulty>label{color:var(--text-soft);font-size:.9rem}.difficulty-editor-actions{justify-content:flex-end;gap:.4rem;display:flex}.upload-error{color:var(--danger);white-space:pre-wrap;text-align:left;max-height:8rem;margin:0;font-size:.8rem;overflow:auto}@media (prefers-reduced-motion:reduce){.difficulty-segments button,.custom-difficulty{transition:none}}.song-list{flex-direction:column;gap:.6rem;width:100%;max-width:40rem;display:flex}.song-row{background:var(--card-bg);text-align:left;overflow:hidden}.song-row-head{width:100%;color:inherit;text-align:left;cursor:pointer;touch-action:manipulation;background:0 0;border:none;align-items:center;gap:.7rem;min-height:4.5rem;padding:.6rem .7rem;display:flex}.song-row-thumb{border-radius:var(--radius-sm);flex-shrink:0;justify-content:center;align-items:center;width:3.4rem;height:3.4rem;display:flex;overflow:hidden}.song-row-thumb img{object-fit:contain;max-width:100%;max-height:100%}.thumb-empty{opacity:.5;display:flex}.thumb-wrap{justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:relative}.thumb-loading{pointer-events:none;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.spinner{box-sizing:border-box;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.list-loading{color:var(--text-soft);justify-content:center;align-items:center;gap:.6rem;padding:1.4rem 0;display:flex}.thumb-cycle{width:100%;height:100%;position:relative}.thumb-cycle img{object-fit:contain;opacity:0;width:100%;height:100%;transition:opacity .9s;position:absolute;inset:0}.thumb-cycle img.visible{opacity:1}.thumb-cycle img.locked{filter:blur(4px)grayscale(.6)}.thumb-cycle img.locked.visible{opacity:.5}.thumb-lock{color:var(--text-strong);text-shadow:0 1px 3px #000000a6;pointer-events:none;flex-direction:column;align-items:center;gap:.3rem;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.thumb-lock-text{white-space:nowrap;font-size:.55rem;line-height:1}.btn-icon{vertical-align:-.2em;flex-shrink:0;margin-right:.4rem}.song-row-info{flex-direction:column;flex:1;gap:.15rem;min-width:0;display:flex}.song-row-title{text-overflow:ellipsis;white-space:nowrap;font-size:1.05rem;font-weight:600;line-height:1.3;overflow:hidden}.song-row-sub{min-width:0;color:var(--text-muted);align-items:center;gap:.4rem;font-size:.85rem;line-height:1.3;display:flex;overflow:hidden}.song-row-artist{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.song-row-tag{color:var(--accent-2);flex-shrink:0}.song-row-tag:before{content:"["}.song-row-tag:after{content:"]"}.song-row-stage{color:var(--text-dim);font-size:.8rem}.song-row-meta{color:var(--text-muted);font-variant-numeric:tabular-nums;flex-shrink:0;align-items:center;gap:.5rem;font-size:.85rem;line-height:1;display:flex}.song-row-chevron{color:var(--text-dim);flex-shrink:0;align-items:center;line-height:1;transition:transform .2s;display:flex}.song-row-head[aria-expanded=true] .song-row-chevron{color:var(--accent);transform:rotate(180deg)}.song-row-body{opacity:0;grid-template-rows:0fr;transition:grid-template-rows .2s,opacity .16s;display:grid}.song-row-body.open{opacity:1;grid-template-rows:1fr}.song-row-body>div{flex-direction:column;gap:.6rem;min-height:0;padding:0 .7rem;display:flex;overflow:hidden}.song-row-body.open>div{padding-bottom:.7rem}@media (prefers-reduced-motion:reduce){.song-row-body,.song-row-chevron{transition:none}}.song-row-actions{flex-wrap:wrap;gap:.4rem;display:flex}.diff-list{flex-direction:column;display:flex}.diff-row{border-top:1px solid var(--card-border);align-items:center;gap:.7rem;padding:.5rem 0;display:flex}.diff-row:first-child{border-top:none}.diff-stats>span{align-items:center;display:inline-flex}.diff-name{flex:none;min-width:3.2rem;font-weight:600}.diff-stats{min-width:0;color:var(--text-muted);font-variant-numeric:tabular-nums;flex-wrap:wrap;flex:1;align-items:center;gap:.7rem;font-size:.82rem;line-height:1.2;display:flex}.diff-actions{flex:none;align-items:center;gap:.4rem;display:flex}.regen-btn{border-radius:var(--radius-sm);background:var(--accent-soft);min-width:2.6rem;height:2.6rem;color:var(--text);cursor:pointer;touch-action:manipulation;border:none;justify-content:center;align-items:center;font-size:1rem;text-decoration:none;display:inline-flex}@media (hover:hover){.regen-btn:hover:not(:disabled):not(.play-btn){background:var(--accent-medium)}}.regen-btn[aria-pressed=true]{background:var(--accent-medium)}.regen-btn:disabled{opacity:.35;cursor:not-allowed}.latency-row{color:var(--text-soft);width:100%;max-width:22rem;margin-top:1rem;font-size:.9rem}.latency-row label{flex-direction:column;gap:.4rem;display:flex}.latency-row input[type=range]{width:100%}.app-footer{color:var(--text-dim);max-width:34rem;font-size:.8rem}.app-footer p{margin:.2rem 0}.app-footer a{color:var(--text-muted)}.game-root{z-index:1;touch-action:none;-webkit-user-select:none;user-select:none;width:100%;height:100%;position:relative}.loading-screen{z-index:2;background:var(--scrim-soft);height:auto;transition:opacity .35s;position:fixed;inset:0}.loading-screen.done{opacity:0;pointer-events:none}.loading-title{font-family:var(--font-display);letter-spacing:.06em;color:var(--text-strong);margin:0;font-size:1.6rem}.loading-bar{background:var(--line);border-radius:999px;width:min(18rem,70vw);height:.5rem;overflow:hidden}.loading-bar-fill{border-radius:inherit;background:linear-gradient(90deg, var(--accent), var(--accent-2));height:100%;transition:width .2s}.loading-percent{color:var(--text-soft);font-variant-numeric:tabular-nums;margin:0}.countdown{color:var(--accent-2);text-shadow:0 0 30px var(--accent-2);z-index:10;pointer-events:none;justify-content:center;align-items:center;font-size:clamp(4rem,22vw,8rem);font-weight:700;display:flex;position:absolute;inset:0}.hud{pointer-events:none;flex-direction:column;align-items:center;padding-top:1rem;display:flex;position:absolute;inset:0}.hud-top{flex-direction:column;align-items:center;gap:.15rem;display:flex}.hud-score{letter-spacing:.05em;font-size:clamp(1.3rem,5vw,1.9rem);font-weight:700}.hud-combo{font-size:calc(clamp(1rem, 3.5vw, 1.25rem) * (1 + var(--heat,0) * 1.15));font-weight:calc(400 + var(--heat,0) * 300);letter-spacing:calc(var(--heat,0) * .06em);color:var(--accent-2-light);text-shadow:0 0 calc(var(--heat,0) * .9rem) rgba(255, 196, 107, calc(var(--heat,0) * .85)), 0 0 calc(var(--heat,0) * 2rem) rgba(255, 106, 92, calc(var(--heat,0) * .6));will-change:transform;animation:.22s ease-out combo-pop}@keyframes combo-pop{0%{transform:scale(calc(1 + var(--heat,0) * .35))}to{transform:scale(1)}}.hud-progress-wrap{width:min(14rem,60vw);margin:.15rem 0 .35rem;position:relative}.hud-progress{background:var(--line);border-radius:2px;width:100%;height:4px;overflow:hidden}.hud-progress-bar{background:linear-gradient(90deg, var(--accent-2), var(--gold));height:100%}.hud-flame{width:0;height:0;transform:scale(calc(.55 + var(--heat,0) * .85));opacity:calc(.45 + var(--heat,0) * .55);animation:2.4s linear infinite flame-hue;position:absolute;top:2px}.hud-flame-core{filter:blur(1px);background:radial-gradient(circle,#ffffe6f2 0%,#ffc46bcc 32%,#ff6a5c73 60%,#ff6a5c00 75%);border-radius:50%;width:1.5rem;height:1.5rem;animation:.26s ease-in-out infinite alternate flame-flicker;position:absolute;top:-.75rem;left:-.75rem}.hud-spark{background:#fff0c8f2;border-radius:50%;width:4px;height:4px;animation:.9s linear infinite spark-fly;position:absolute;top:-2px;left:-2px;box-shadow:0 0 .35rem #ffc46be6}.hud-spark:nth-child(2){--dx:.9rem;--dy:-1.1rem;animation-duration:.85s;animation-delay:0s}.hud-spark:nth-child(3){--dx:.3rem;--dy:-1.5rem;animation-duration:1.05s;animation-delay:.12s}.hud-spark:nth-child(4){--dx:1.3rem;--dy:-.6rem;animation-duration:.75s;animation-delay:.26s}.hud-spark:nth-child(5){--dx:-.4rem;--dy:-1.2rem;animation-duration:.95s;animation-delay:.38s}.hud-spark:nth-child(6){--dx:.7rem;--dy:-1.8rem;animation-duration:1.15s;animation-delay:.5s}.hud-spark:nth-child(7){--dx:1.6rem;--dy:-1.3rem;animation-duration:.9s;animation-delay:.64s}@keyframes flame-flicker{0%{opacity:.8;transform:scale(.85)translateY(0)}to{opacity:1;transform:scale(1.15)translateY(-.1rem)}}@keyframes flame-hue{0%{filter:hue-rotate()saturate(1.2)}to{filter:hue-rotate(360deg)saturate(1.2)}}@keyframes spark-fly{0%{opacity:0;transform:translate(0)scale(1)}15%{opacity:1}to{transform:translate(calc(var(--dx,1rem) * (.5 + var(--heat,0))), calc(var(--dy,-1rem) * (.5 + var(--heat,0)))) scale(.2);opacity:0}}@media (prefers-reduced-motion:reduce){.hud-combo,.hud-flame,.hud-flame-core,.hud-spark{animation:none}.hud-spark{display:none}}.hud-judgement{letter-spacing:.1em;font-size:clamp(1.5rem,6vw,2.2rem);font-weight:700;animation:.4s ease-out forwards pop;position:absolute;top:30%}@keyframes pop{0%{opacity:0;transform:scale(1.4)}30%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(1)}}.hud-keys{left:0;right:0;bottom:calc(.5rem + env(safe-area-inset-bottom));color:var(--text-hint);text-align:center;padding:0 1rem;font-size:.8rem;position:absolute}.hud-demo{color:var(--gold);letter-spacing:.1em}.result-root{z-index:1;pointer-events:none;width:100%;height:100%;position:relative}.result-root .game-back-btn{pointer-events:auto}.result-info{top:calc(1rem + env(safe-area-inset-top));text-align:center;text-shadow:0 2px 10px #060c0bd9,0 0 3px #060c0bb3;flex-direction:column;align-items:center;gap:.3rem;width:min(40rem,100% - 2rem);animation:.7s ease-out .5s both result-info-in;display:flex;position:absolute;left:50%;transform:translate(-50%)}@keyframes result-info-in{0%{opacity:0;transform:translate(-50%,-1.2rem)}to{opacity:1;transform:translate(-50%)}}.result-info h1{color:var(--text-title);margin:0;font-size:clamp(1.1rem,4.5vw,1.5rem)}.result-score{font-size:clamp(1.8rem,8vw,2.6rem);font-weight:700}.result-bottom{pointer-events:auto;bottom:calc(1rem + env(safe-area-inset-bottom));flex-direction:column;align-items:center;gap:.5rem;width:min(40rem,100% - 2rem);animation:.7s ease-out .5s both result-actions-in;display:flex;position:absolute;left:50%;transform:translate(-50%)}.result-counts{text-align:center;text-shadow:0 2px 10px #060c0bd9,0 0 3px #060c0bb3;flex-wrap:wrap;justify-content:center;gap:.3rem 1rem;font-size:.95rem;display:flex}.result-beads{color:var(--accent-2-light);text-align:center;text-shadow:0 2px 10px #060c0bd9,0 0 3px #060c0bb3;font-size:.95rem}.result-actions{flex-wrap:wrap;justify-content:center;gap:.5rem;display:flex}.result-actions .song-btn{background-color:#ffffff0d;background-image:var(--neon-flow-dim);color:var(--text-strong);text-shadow:0 1px 3px #060c0bcc;background-size:240% 100%;animation:9s ease-in-out infinite alternate neon-flow}@media (hover:hover){.result-actions .song-btn:hover:not(:disabled){background-color:#ffffff17;background-image:var(--neon-flow);transform:translateY(-2px)}}@media (prefers-reduced-motion:reduce){.result-actions .song-btn{background-position:50%;animation:none}}@keyframes result-actions-in{0%{opacity:0;transform:translate(-50%,1.5rem)}to{opacity:1;transform:translate(-50%)}}.account-corner{top:calc(.75rem + env(safe-area-inset-top));right:calc(.75rem + env(safe-area-inset-right));z-index:20;align-items:center;gap:.25rem;display:flex;position:fixed}.icon-btn{color:var(--text);cursor:pointer;touch-action:manipulation;background:0 0;border:none;justify-content:center;align-items:center;padding:.4rem;display:flex}.account-popover{z-index:60;border-radius:var(--radius-md);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 12px 32px var(--shadow-strong), 0 2px 8px var(--shadow);white-space:nowrap;background:#09100ef7;border:1px solid #ffffff24;align-items:center;gap:.5rem;padding:.6rem .8rem;display:flex;position:absolute;top:2.5rem;right:0}form.account-popover{width:max(16rem,60vw);max-width:calc(100vw - 1.5rem - env(safe-area-inset-right));white-space:normal;flex-direction:column;align-items:stretch}.account-email{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.account-form{margin-bottom:0}.account-tabs{gap:8px;display:flex}.account-tabs button{border-radius:var(--radius-sm);background:var(--bg-raised);color:var(--text-muted);cursor:pointer;border:none;flex:1;padding:6px}.account-tabs button[aria-pressed=true]{background:var(--accent-soft);color:var(--text);font-weight:600}.account-code-row{gap:8px;display:flex}.account-code-row input{letter-spacing:.2em;flex:1;min-width:0}.account-code-row button{white-space:nowrap}.account-hint{color:var(--text-muted);font-size:.8rem}.account-notice{opacity:.8;margin:0 auto 12px;font-size:13px}.section{flex-direction:column;align-items:center;gap:.6rem;width:100%;display:flex}.section-title{letter-spacing:.04em;max-width:40rem;color:var(--text-muted);text-transform:uppercase;align-self:flex-start;margin:12px auto 0;font-size:.95rem;font-weight:600}.game-back-btn{top:calc(.75rem + env(safe-area-inset-top));left:calc(.75rem + env(safe-area-inset-left));z-index:20;width:2.6rem;height:2.6rem;color:var(--text);opacity:.75;cursor:pointer;touch-action:manipulation;background:0 0;border:none;justify-content:center;align-items:center;transition:opacity .15s,transform .15s;display:flex;position:absolute}@media (hover:hover){.game-back-btn:hover{opacity:1;transform:scale(1.08)}}.pause-overlay{z-index:30;background:var(--scrim);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);justify-content:center;align-items:center;padding:1rem;display:flex;position:absolute;inset:0}.pause-menu{background:var(--panel-bg);border:1px solid var(--line);text-align:center;border-radius:.9rem;flex-direction:column;gap:.7rem;width:min(18rem,100%);padding:1.4rem 1.2rem;display:flex}.pause-menu.wide{width:min(24rem,100%);max-height:100%;overflow-y:auto}.pause-menu .settings-list{background:0 0;width:100%;padding:0}.pause-menu h2{letter-spacing:.1em;color:var(--text-title);margin:0 0 .3rem;font-size:1.4rem}.world{z-index:0;pointer-events:none;position:fixed;inset:0}.world canvas{display:block}.world.interactive{pointer-events:auto}.menu-scrim{background:radial-gradient(34rem 90%,#060c0b61,#060c0b00 70%);transition:background-color .4s,opacity .6s;position:absolute;inset:0}.menu-scrim.dim{background-color:var(--scrim)}.menu-scrim.exiting{opacity:0}.menu-layer{z-index:1;width:100%;height:100%;position:relative}.home-screen .app-title{text-shadow:0 2px 14px #060c0bbf,0 0 2px #060c0b99}.home-screen{gap:2.2rem;width:min(100%,24rem);margin:0 auto;padding:0 1.25rem}.home-menu{flex-direction:column;gap:.8rem;width:100%;display:flex}.home-menu-btn{border-radius:var(--radius-lg);background:var(--panel-bg-soft);min-height:4.2rem;box-shadow:0 6px 18px var(--shadow);color:var(--text);text-align:left;cursor:pointer;touch-action:manipulation;border:none;flex-direction:row;justify-content:flex-start;align-items:center;gap:1rem;padding:0 1.3rem;font-size:1.15rem;font-weight:600;transition:background .15s,transform .15s,border-color .15s;display:flex}@media (hover:hover){.home-menu-btn:hover{background:color-mix(in srgb, var(--accent) 16%, var(--panel-bg));transform:translateY(-2px)}}.home-menu-btn svg{color:var(--accent);flex-shrink:0}.sub-screen{padding-left:1.25rem;padding-right:1.25rem;padding-top:calc(3.2rem + env(safe-area-inset-top));touch-action:pan-y;justify-content:flex-start;gap:1.2rem;padding-bottom:3rem;overflow-y:auto}.sub-screen>*{flex-shrink:0}.sub-screen>.game-back-btn{position:fixed}.tutorial-root{touch-action:none;-webkit-user-select:none;user-select:none;width:100%;height:100%;position:relative;overflow:hidden}.tutorial-lanes{pointer-events:none;width:100%;height:100%;position:absolute;inset:0}.tutorial-panel{top:calc(.75rem + env(safe-area-inset-top));border-radius:var(--radius-lg);background:var(--panel-bg-soft);width:min(26rem,100% - 7rem);box-shadow:0 6px 18px var(--shadow);text-align:center;pointer-events:none;flex-direction:column;align-items:center;gap:.4rem;padding:.8rem 1rem;display:flex;position:absolute;left:50%;transform:translate(-50%)}.tutorial-panel h2{letter-spacing:.06em;color:var(--text-title);margin:0;font-size:1.25rem}.tutorial-status{color:var(--accent);font-variant-numeric:tabular-nums;margin:0;font-weight:600}.tutorial-dots{flex-wrap:wrap;justify-content:center;gap:.4rem;display:flex}.tutorial-dots span{background:var(--line);border-radius:50%;width:.7rem;height:.7rem;transition:background .15s}.tutorial-dots span.on{background:var(--gold)}.tutorial-count{text-align:center;color:var(--accent-2);text-shadow:0 0 24px var(--accent-2);pointer-events:none;font-size:clamp(3rem,14vw,5rem);font-weight:700;animation:.5s ease-out forwards pop;position:absolute;top:38%;left:0;right:0}.hud-judgement.long{animation-duration:1.2s}.tutorial-root .keys-touch{display:none}@media (pointer:coarse){.tutorial-root .keys-kbd{display:none}.tutorial-root .keys-touch{display:inline}}.create-panels{flex-wrap:wrap;justify-content:center;gap:1rem;width:100%;max-width:40rem;display:flex}.create-panel{border-radius:var(--radius-lg);background:var(--card-bg);border:1px dashed var(--card-border);flex-direction:column;flex:14rem;align-items:center;gap:.5rem;padding:1.4rem 1rem;display:flex}.create-panel h2{margin:0;font-size:1.1rem}.create-soon{color:var(--text-dim);font-size:.8rem}.settings-list{border-radius:var(--radius-lg);background:var(--card-bg);text-align:left;flex-direction:column;gap:1.6rem;width:min(26rem,100%);padding:1.4rem 1.5rem;display:flex}.settings-row{justify-content:space-between;align-items:center;gap:1rem;display:flex}.settings-toggle{gap:.5rem;display:flex}.source-tabs{gap:8px;display:flex}.source-tabs button{border-radius:var(--radius-sm);background:var(--bg-raised);color:var(--text-muted);cursor:pointer;border:none;flex:1;padding:6px}.source-tabs button[aria-pressed=true]{background:var(--accent-soft);color:var(--text);font-weight:600}.source-tabs button:disabled{opacity:.4;cursor:not-allowed}.field-hint{color:var(--text-dim);margin:0;font-size:.8rem;line-height:1.4}.design-picker{flex-direction:column;gap:.6rem;display:flex}.design-picker-group{flex-direction:column;gap:.3rem;display:flex}.design-grid{grid-template-columns:repeat(auto-fill,minmax(5.5rem,1fr));gap:.5rem;max-height:16rem;display:grid;overflow-y:auto}.design-tile{border-radius:var(--radius-sm);background:var(--bg-raised);min-width:0;color:var(--text-muted);cursor:pointer;border:2px solid #0000;flex-direction:column;align-items:center;gap:.25rem;padding:.4rem;display:flex;position:relative}@media (hover:hover){.design-tile:hover{background:var(--accent-soft)}}.design-tile.active{border-color:var(--accent);color:var(--text)}.design-tile img{aspect-ratio:1;object-fit:contain;width:100%}.design-tile-name{text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:.75rem;overflow:hidden}.design-tile-check{color:var(--accent);position:absolute;top:.25rem;right:.25rem}.photo-pick{align-items:center;gap:.8rem;display:flex}.photo-drop{border:1px dashed var(--accent);border-radius:var(--radius-md);background:var(--bg-raised);width:7rem;height:7rem;color:var(--text-muted);cursor:pointer;flex-direction:column;flex:none;justify-content:center;align-items:center;gap:.3rem;padding:0;display:flex;overflow:hidden}.photo-drop img{object-fit:cover;width:100%;height:100%}@media (width<=480px){.photo-pick{flex-direction:column;align-items:stretch}.photo-drop{width:100%}}.create-flow{flex-direction:column;gap:.8rem;width:100%;max-width:36rem;display:flex}.create-tabs{grid-template-columns:1fr 1fr;gap:.5rem;display:grid}.create-tab{border:1px solid var(--card-border);border-radius:var(--radius-md);background:var(--card-bg);min-width:0;color:var(--text-muted);text-align:left;cursor:pointer;align-items:center;gap:.55rem;padding:.6rem .7rem;transition:background .18s,border-color .18s;display:flex}@media (hover:hover){.create-tab:hover:not(:disabled):not(.active):not(.done){background:var(--accent-soft)}}.create-tab.active{border-color:var(--accent);background:var(--accent-soft);color:var(--text)}.create-tab:disabled{cursor:default}.create-reset{align-self:flex-end;margin:-.2rem 0 0;font-size:.85rem}.create-tab-icon{border-radius:var(--radius-sm);background:var(--bg-raised);flex:none;justify-content:center;align-items:center;width:2.4rem;height:2.4rem;display:flex;overflow:hidden}.create-tab-icon img{object-fit:contain;width:100%;height:100%}.create-tab-text{flex-direction:column;min-width:0;display:flex}.create-tab-text span{color:var(--text-dim);text-overflow:ellipsis;white-space:nowrap;font-size:.78rem;overflow:hidden}.create-tab.done .create-tab-text span{color:var(--accent)}.create-tab-check{color:var(--accent);flex:none;margin-left:auto}.create-flow .create-panel{text-align:left;flex:none;align-items:stretch;gap:.7rem}.create-flow .create-panel>.subtitle,.create-flow .create-panel>h2{text-align:center;margin:0}.create-flow .upload-panel{background:0 0;border:none;max-width:none;padding:0}.create-flow .create-panel[role=tabpanel]{background:0 0;border:none;border-radius:0;padding:0}.create-flow form.create-panel.upload-panel{border:1px dashed var(--card-border);background:var(--card-bg);padding:1.2rem 1rem}.design-tile>button{width:100%;min-width:0;color:inherit;font:inherit;cursor:pointer;background:0 0;border:none;flex-direction:column;align-items:center;gap:.25rem;padding:0;display:flex}.design-tile>button:disabled{cursor:default}.design-tile:not(.done) img{opacity:.5}.design-tile.error .design-tile-name{color:var(--danger)}.design-tile-delete{background:var(--shadow-strong);width:1.4rem;height:1.4rem;color:var(--text);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;padding:0;display:none;position:absolute;top:.15rem;left:.15rem}.design-tile:hover .design-tile-delete,.design-tile:focus-within .design-tile-delete{display:flex}@media (pointer:coarse){.design-tile-delete{display:flex}}.create-done{border-radius:var(--radius-md);background:var(--accent-soft);color:var(--text);text-align:left;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;padding:.6rem .8rem;font-size:.9rem;display:flex}.confirm-overlay{z-index:50;background:var(--scrim);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.confirm-message{color:var(--text);margin:0 0 .3rem;line-height:1.4}.slider{flex-direction:column;gap:.7rem;display:flex}.slider-head{justify-content:space-between;align-items:baseline;gap:1rem;display:flex}.slider-label{color:var(--text-soft);font-size:.95rem}.slider-value{color:var(--accent);font-variant-numeric:tabular-nums;font-weight:600}.slider input[type=range]{--thumb:1.3rem;--track:.4rem;appearance:none;width:100%;height:var(--thumb);cursor:pointer;touch-action:pan-y;background:0 0;margin:0}.slider input[type=range]::-webkit-slider-runnable-track{height:var(--track);border-radius:var(--track);background:linear-gradient(to right, var(--accent) var(--fill), var(--line) var(--fill))}.slider input[type=range]::-moz-range-track{height:var(--track);border-radius:var(--track);background:var(--line)}.slider input[type=range]::-moz-range-progress{height:var(--track);border-radius:var(--track);background:var(--accent)}.slider input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:var(--thumb);height:var(--thumb);margin-top:calc((var(--track) - var(--thumb)) / 2);background:var(--text-strong);box-shadow:0 0 0 .25rem var(--accent-soft), 0 .1rem .4rem var(--shadow);border:none;border-radius:50%;transition:box-shadow .15s}.slider input[type=range]::-moz-range-thumb{width:var(--thumb);height:var(--thumb);background:var(--text-strong);box-shadow:0 0 0 .25rem var(--accent-soft), 0 .1rem .4rem var(--shadow);border:none;border-radius:50%}.slider input[type=range]:active::-webkit-slider-thumb{box-shadow:0 0 0 .4rem var(--accent-medium), 0 .1rem .4rem var(--shadow)}.slider input[type=range]:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 .4rem var(--accent-medium), 0 .1rem .4rem var(--shadow)}.list-tabs{width:100%;max-width:40rem}.list-tabs button{padding:.7rem}.switch{color:var(--text-soft);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:.7rem;display:inline-flex}.switch input{opacity:0;width:0;height:0;position:absolute}.switch-track{background:var(--line);border-radius:1.5rem;flex-shrink:0;width:2.6rem;height:1.5rem;transition:background .15s;position:relative}.switch-track:after{content:"";background:var(--text-strong);width:1.1rem;height:1.1rem;box-shadow:0 .1rem .3rem var(--shadow);border-radius:50%;transition:transform .15s;position:absolute;top:.2rem;left:.2rem}.switch input:checked+.switch-track{background:var(--accent)}.switch input:checked+.switch-track:after{transform:translate(1.1rem)}.switch input:focus-visible+.switch-track{box-shadow:0 0 0 .25rem var(--accent-medium)}.switch input:checked~.switch-label{color:var(--text)}.settings-row.switch .slider-label{flex-direction:column;flex:1;gap:.15rem;display:flex}.settings-hint{color:var(--text-dim);font-size:.78rem;line-height:1.3}@media (prefers-reduced-motion:reduce){.switch-track,.switch-track:after{transition:none}}.switch.settings-row{justify-content:space-between;display:flex}.create-song-title{padding:.8rem 1rem}.design-tile.locked img{filter:blur(4px)grayscale(.6);opacity:.5}.design-tile.locked .design-tile-name{color:var(--text-dim)}.design-tile-lock{color:var(--text-soft);pointer-events:none;position:absolute;top:38%;left:50%;transform:translate(-50%,-50%)}.design-tile.locked .design-tile-name{white-space:normal;text-align:center;font-size:.72rem;line-height:1.25}.song-picker{flex-direction:column;gap:.5rem;width:100%;display:flex}.song-picker-search{border-radius:var(--radius-md);background:var(--bg-raised);align-items:center;gap:.5rem;min-height:2.9rem;padding:0 .9rem;color:var(--text-dim)!important;flex-direction:row!important;display:flex!important}.song-picker-search:focus-within{box-shadow:0 0 0 2px var(--accent-medium)}.song-picker .song-picker-search input{min-width:0;color:var(--text);background:0 0;border:none;outline:none;flex:1;padding:.2rem 0}.song-picker-list{flex-direction:column;gap:.3rem;display:flex}.song-picker-header{color:var(--text-dim);letter-spacing:.06em;margin:.5rem 0 .2rem;font-size:.75rem}.song-picker-option{border-radius:var(--radius-sm);background:var(--card-bg);width:100%;min-height:2.8rem;color:var(--text-soft);text-align:left;cursor:pointer;touch-action:manipulation;border:none;align-items:center;gap:.5rem;padding:0 .9rem;display:flex}@media (hover:hover){.song-picker-option:hover{background:var(--accent-soft);color:var(--text)}}.song-picker-option.selected{background:var(--accent-soft);color:var(--accent)}.song-picker-option-text{white-space:nowrap;flex:1;align-items:baseline;gap:.5rem;min-width:0;display:flex;overflow:hidden}.song-picker-option-title{text-overflow:ellipsis;overflow:hidden}.song-picker-artist{color:var(--text-muted);font-size:.85em}.song-picker-sentinel{height:1px}.song-picker-empty{color:var(--text-dim);text-align:center;padding:1rem;font-size:.9rem}.splash{z-index:50;padding:calc(1rem + env(safe-area-inset-top)) 1rem calc(1rem + env(safe-area-inset-bottom));background:var(--bg);justify-content:center;align-items:center;display:flex;position:fixed;inset:0;overflow-y:auto}body.splash-open{overflow:hidden}.splash-inner{text-align:center;flex-direction:column;align-items:center;gap:1.5rem;width:min(26rem,100%);margin:auto;display:flex}.splash-title{font-family:var(--font-display);letter-spacing:.06em;color:var(--text-strong);margin:0;font-size:clamp(2rem,9vw,2.6rem)}.splash-intro{color:var(--text-soft);text-align:left;text-wrap:pretty;margin:0;font-size:.95rem;line-height:1.75}.splash-lead{border-bottom:1px solid var(--line-soft);color:var(--text-dim);letter-spacing:.12em;text-align:left;align-self:stretch;margin:0;padding-bottom:.5rem;font-size:.72rem}.splash-terms{color:var(--text-dim);text-align:left;flex-direction:column;gap:.55rem;margin:-.75rem 0 0;padding:0;font-size:.78rem;line-height:1.7;list-style:none;display:flex}.splash-warn{color:var(--text-dim);margin:-.75rem 0 0;font-size:.78rem}.splash .song-btn.start{min-width:11rem}.splash-footer{color:var(--text-muted);letter-spacing:.04em;flex-direction:column;gap:.3rem;margin-top:-.5rem;font-size:.72rem;display:flex}.splash-footer p{margin:0}:root{--neon-flow:linear-gradient(100deg, #38e0b457 0%, #ffc46b42 22%, #ff6a5c70 50%, #ffc46b42 78%, #38e0b457 100%);--neon-flow-dim:linear-gradient(100deg, #38e0b42b 0%, #ffc46b21 22%, #ff6a5c38 50%, #ffc46b21 78%, #38e0b42b 100%);--neon-glow:0 0 1.2rem #ff7a5c33, 0 0 2.4rem #4fd1a51a;--surface-off:#ffffff0d;--surface-off-hover:#ffffff17}@keyframes neon-flow{0%{background-position:0%}to{background-position:100%}}.source-tabs button,.account-tabs button,.settings-toggle button,.difficulty-segments button,.song-picker-option,.design-tile,.create-tab{background-color:var(--surface-off);box-shadow:none;color:var(--text-muted);background-image:none;border-color:#0000;transition:background-color .18s,box-shadow .18s,color .18s}@media (hover:hover){.source-tabs button:hover:not(:disabled):not([aria-pressed=true]),.account-tabs button:hover:not([aria-pressed=true]),.settings-toggle button:hover:not([aria-pressed=true]),.difficulty-segments button:hover:not(.active),.song-picker-option:hover:not(.selected),.design-tile:hover:not(.active),.create-tab:hover:not(:disabled):not(.active):not(.done){background-color:var(--surface-off-hover);color:var(--text)}}.source-tabs button[aria-pressed=true],.account-tabs button[aria-pressed=true],.settings-toggle button[aria-pressed=true],.difficulty-segments button.active,.song-picker-option.selected,.design-tile.active,.create-tab.active,.create-tab.done{background-color:#ffffff0f;background-image:var(--neon-flow);box-shadow:var(--neon-glow);color:var(--text-strong);background-size:240% 100%;border-color:#0000;font-weight:600;animation:7s ease-in-out infinite alternate neon-flow}@media (hover:hover){.source-tabs button[aria-pressed=true]:hover,.account-tabs button[aria-pressed=true]:hover,.settings-toggle button[aria-pressed=true]:hover,.difficulty-segments button.active:hover,.song-picker-option.selected:hover,.design-tile.active:hover,.create-tab.active:hover,.create-tab.done:hover{background-color:#ffffff1a;background-image:var(--neon-flow);transform:none;box-shadow:0 0 1.4rem #ff7a5c4d,0 0 2.8rem #4fd1a524}}.difficulty-segments button.active span,.create-tab.active .create-tab-text span,.create-tab.done .create-tab-text span,.design-tile.active .design-tile-name{color:#ffffffd9}.create-tab.active .create-tab-check,.create-tab.done .create-tab-check,.design-tile.active .design-tile-check{color:var(--text-strong)}.create-tab:disabled{opacity:1}.create-tab-icon,.create-tab.active .create-tab-icon,.create-tab.done .create-tab-icon{background:0 0;border:none}@media (prefers-reduced-motion:reduce){.source-tabs button[aria-pressed=true],.account-tabs button[aria-pressed=true],.settings-toggle button[aria-pressed=true],.difficulty-segments button.active,.song-picker-option.selected,.design-tile.active,.create-tab.active,.create-tab.done{background-position:50%;animation:none}}@keyframes neon-radiate{0%{background-size:140% 240%}to{background-size:230% 420%}}.song-btn.start,.regen-btn.play-btn{color:var(--text-strong);text-shadow:0 1px 2px #060c0b80;background-color:#ffffff0f;background-image:radial-gradient(circle,#ffe4c7f2 0%,#ff8a60d1 22%,#ff7a5c8c 48%,#ffc46b4d 72%,#4fd1a51f 100%);background-position:50%;background-repeat:no-repeat;background-size:180% 320%;border:none;font-weight:600;animation:3.6s ease-in-out infinite alternate neon-radiate;box-shadow:0 0 1.2rem #ff7a5c4d,0 0 2.8rem #ffc46b24}@media (hover:hover){.song-btn.start:hover:not(:disabled),.regen-btn.play-btn:hover:not(:disabled){background-color:#ffffff1a;box-shadow:0 0 1.6rem #ff7a5c73,0 0 3.4rem #ffc46b38}}.song-btn.start:disabled,.regen-btn.play-btn:disabled{background-color:var(--line);box-shadow:none;color:var(--text-muted);text-shadow:none;background-image:none;animation:none}@media (prefers-reduced-motion:reduce){.song-btn.start,.regen-btn.play-btn{animation:none}}.upload-panel,.create-flow form.create-panel.upload-panel{background:0 0;border-color:#ffffff14}.upload-panel input:not([type=checkbox]),.upload-panel select,.upload-panel textarea,.song-picker-search,.design-grid{background:#ffffff06;border:1px solid #ffffff1a}.account-popover input{background:#ffffff0f;border:1px solid #ffffff24}.upload-panel input:not([type=checkbox]):focus,.upload-panel select:focus,.upload-panel textarea:focus{background:#ffffff14;border-color:#0000;outline:none;box-shadow:0 0 0 2px #ff7a5c61,0 0 1.2rem #ff7a5c29}.photo-drop{background:#ffffff06;border:1px dashed #ffffff29}@media (hover:hover){.photo-drop:hover{background:#ffffff12;border-color:#ff7a5c73}}.home-menu-btn{white-space:nowrap;isolation:isolate;position:relative;overflow:hidden}.home-menu-btn:before{content:"";z-index:-1;background-image:var(--neon-flow);-webkit-mask-image:linear-gradient(90deg, #0000 0, #000 min(1.5rem, calc(var(--pulse,0) * 100%)), #000 max(0px, calc(var(--pulse,0) * 100% - 3rem)), #0000 calc(var(--pulse,0) * 100%));-webkit-mask-image:linear-gradient(90deg, #0000 0, #000 min(1.5rem, calc(var(--pulse,0) * 100%)), #000 max(0px, calc(var(--pulse,0) * 100% - 3rem)), #0000 calc(var(--pulse,0) * 100%));mask-image:linear-gradient(90deg, #0000 0, #000 min(1.5rem, calc(var(--pulse,0) * 100%)), #000 max(0px, calc(var(--pulse,0) * 100% - 3rem)), #0000 calc(var(--pulse,0) * 100%));opacity:.85;background-size:240% 100%;animation:7s ease-in-out infinite alternate neon-flow;position:absolute;inset:0}@media (prefers-reduced-motion:reduce){.home-menu-btn:before{animation:none}}