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:root{--bg-color:#070908;--panel-bg:#0f1512;--panel-bg-hover:#1a241f;--text-primary:#fff;--text-secondary:#6b7280;--border-color:#1a241f;--danger:#ef4444;--easy-rgb:30, 215, 96;--medium-rgb:234, 179, 8;--hard-rgb:249, 115, 22;--expert-rgb:239, 68, 68;--impossible-rgb:139, 92, 246;--accent-rgb:var(--easy-rgb);--accent-color:rgb(var(--accent-rgb))}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-family:var(--font-geist-sans), sans-serif;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:relative;overflow:hidden}body:before{content:"";background:radial-gradient(ellipse 50% 100% at 50% -10%, rgba(var(--accent-rgb), .15) 0%, rgba(var(--accent-rgb), .04) 50%, transparent 100%);pointer-events:none;z-index:-1;width:150vw;height:100vh;transition:background .3s;position:absolute;top:0;left:50%;transform:translate(-50%)}.app-container{grid-template-columns:250px 1fr 250px;justify-content:space-between;gap:2rem;width:100%;max-width:1600px;height:100%;padding:2rem 4rem;display:grid}.sidebar{flex-direction:column;justify-content:center;gap:2rem;padding:1rem 12px;display:flex;overflow:visible}.main-content{flex-direction:column;justify-content:center;align-items:center;display:flex;position:relative}.section-title{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.1em;margin-bottom:.75rem;font-size:.75rem;font-weight:700}.sidebar-btn{color:var(--text-secondary);cursor:pointer;text-align:left;background:#ffffff05;border:1px solid #ffffff1a;border-radius:8px;width:100%;margin-bottom:.5rem;padding:.75rem 1rem;font-size:.9rem;font-weight:600;transition:all .2s}.sidebar-btn:hover{color:var(--text-primary);background:#ffffff0f}.sidebar-btn.active{background:rgba(var(--accent-rgb), .1);color:var(--accent-color);border-color:rgba(var(--accent-rgb), .2)}.logo{color:#ffffff0f;text-shadow:0 0 25px #ffffff0d;letter-spacing:-.02em;pointer-events:none;-webkit-user-select:none;user-select:none;text-align:center;margin-bottom:2rem;font-size:3.5rem;font-style:italic;font-weight:900}.difficulty-pills{background:#ffffff0d;border-radius:20px;gap:clamp(.2rem,1.5vw,.5rem);width:100%;max-width:600px;margin-bottom:2rem;padding:.25rem;display:flex}.pill{text-align:center;letter-spacing:-.03em;cursor:pointer;color:var(--text-secondary);white-space:nowrap;border-radius:16px;flex:1;justify-content:center;align-items:center;padding:.4rem clamp(.1rem,1vw,.75rem);font-size:clamp(.55rem,2vw,.8rem);font-weight:700;transition:all .2s;display:flex}.pill.active{background:var(--accent-color);color:#000}.pill:hover:not(.active){color:var(--text-primary)}.progress-container{width:100%;max-width:600px;margin-bottom:3rem;position:relative}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-color)}::-webkit-scrollbar-thumb{background:var(--surface);border-radius:4px}@keyframes popIn{0%{opacity:0;transform:scale(.9)translateY(20px)}to{opacity:1;transform:scale(1)translateY(0)}}.animate-pop-in{animation:.6s cubic-bezier(.175,.885,.32,1.275) forwards popIn}@keyframes slideUpFade{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-slide-up{animation:.4s ease-out forwards slideUpFade}.progress-bg{background:#ffffff14;border-radius:6px;width:100%;height:12px;position:relative;overflow:hidden}.progress-fill{background:var(--accent-color);border-radius:6px;height:100%;transition:width .3s,background .3s}.progress-marker{color:var(--accent-color);font-size:.75rem;font-weight:700;position:absolute;top:16px}.play-area{align-items:center;gap:1.5rem;margin-bottom:3rem;display:flex}.play-btn{background:var(--accent-color);cursor:pointer;width:100px;height:100px;box-shadow:0 0 40px rgba(var(--accent-rgb), .3);border:none;border-radius:50%;justify-content:center;align-items:center;transition:transform .2s,background .3s,box-shadow .3s;display:flex}.play-btn:hover{transform:scale(1.05)}.play-btn:disabled{background:var(--panel-bg);box-shadow:none;cursor:default;transform:none}.time-display{color:var(--accent-color);font-size:1.25rem;font-weight:700}.input-area{gap:1rem;width:100%;max-width:600px;display:flex}.search-input{color:var(--text-primary);background:#ffffff0a;border:1px solid #ffffff1a;border-radius:24px;outline:none;flex:1;align-items:center;padding:1rem 1.5rem;font-size:1rem;display:flex}.search-input:focus-within{border-color:var(--text-secondary)}.search-input input{color:#fff;background:0 0;border:none;outline:none;width:100%;margin-left:.75rem;font-size:.95rem}.skip-btn{color:var(--text-primary);cursor:pointer;background:#ffffff05;border:1px solid #ffffff1a;border-radius:24px;align-items:center;gap:.5rem;padding:0 1.5rem;font-weight:600;transition:background .2s;display:flex}.skip-btn:hover{background:var(--panel-bg-hover)}.grid-btns{grid-template-columns:1fr 1fr 1fr;gap:.5rem;display:grid}.grid-btn{color:var(--text-secondary);cursor:pointer;background:#ffffff05;border:1px solid #ffffff1a;border-radius:8px;padding:.5rem;font-size:.8rem;font-weight:700;transition:all .3s}.grid-btn.active{background:rgba(var(--accent-rgb), .1);color:var(--accent-color);border-color:rgba(var(--accent-rgb), .2)}.volume-slider{appearance:none;background:0 0;outline:none;width:100%;height:24px;margin:0}.volume-slider::-webkit-slider-runnable-track{background:linear-gradient(to right, var(--accent-color) 0%, var(--accent-color) var(--vol,0%), var(--panel-bg) var(--vol,0%), var(--panel-bg) 100%);border-radius:3px;width:100%;height:6px}.volume-slider::-moz-range-track{background:linear-gradient(to right, var(--accent-color) 0%, var(--accent-color) var(--vol,0%), var(--panel-bg) var(--vol,0%), var(--panel-bg) 100%);border-radius:3px;width:100%;height:6px}.volume-slider::-webkit-slider-thumb{appearance:none;background:var(--accent-color);cursor:pointer;width:16px;height:16px;box-shadow:0 0 12px var(--accent-color);opacity:0;border-radius:50%;margin-top:-5px;transition:opacity .2s,transform .2s,background .3s,box-shadow .3s;transform:scale(.5)}.volume-slider::-moz-range-thumb{appearance:none;background:var(--accent-color);cursor:pointer;width:16px;height:16px;box-shadow:0 0 12px var(--accent-color);opacity:0;border:none;border-radius:50%;transition:opacity .2s,transform .2s,background .3s,box-shadow .3s;transform:scale(.5)}.volume-slider:hover::-webkit-slider-thumb{opacity:1;transform:scale(1)}.volume-slider:hover::-moz-range-thumb{opacity:1;transform:scale(1)}.autocomplete-dropdown{-webkit-backdrop-filter:blur(24px);z-index:50;background:#141416d9;border:1px solid #ffffff0f;border-radius:16px;flex-direction:column;width:100%;max-height:280px;padding:.5rem;display:flex;position:absolute;bottom:calc(100% + 12px);left:0;overflow-y:auto;box-shadow:0 -10px 40px #000000b3}.dropdown-item{cursor:pointer;text-align:left;border-radius:10px;margin-bottom:2px;padding:.75rem 1rem;transition:all .2s}.dropdown-item:last-child{margin-bottom:0}.dropdown-item:hover,.dropdown-item.selected{background:#ffffff1a}.dropdown-item-title{color:#fff;letter-spacing:-.01em;margin-bottom:.1rem;font-size:1.05rem;font-weight:800}.dropdown-item-artist{color:var(--text-secondary);font-size:.85rem;font-weight:500}.mobile-menu-btn{cursor:pointer;z-index:40;width:44px;height:44px;color:var(--text-primary);background:#ffffff08;border:1px solid #ffffff0d;border-radius:50%;justify-content:center;align-items:center;display:none;position:absolute;top:1.5rem;left:1.5rem}.mobile-overlay{-webkit-backdrop-filter:blur(4px);z-index:50;opacity:0;background:#0009;animation:.3s forwards fadeIn;position:fixed;inset:0}@keyframes fadeIn{to{opacity:1}}.mobile-drawer{background:var(--bg-color);border-right:1px solid var(--border-color);z-index:60;flex-direction:column;width:320px;max-width:85vw;transition:transform .3s cubic-bezier(.4,0,.2,1);display:none;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%)}.mobile-drawer.open{transform:translate(0)}.mobile-drawer-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:1.5rem;display:flex}.close-btn{cursor:pointer;background:#ffffff08;border:1px solid #ffffff0d;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.mobile-drawer-content{flex-direction:column;flex:1;gap:2.5rem;padding:1.5rem;display:flex;overflow-y:auto}.drawer-divider{border:0;border-top:1px solid var(--border-color);margin:0 -1.5rem}@media (max-width:1024px){.app-container{flex-direction:column;justify-content:center;padding:1.5rem 10vw;display:flex}.desktop-sidebar{display:none!important}.mobile-menu-btn,.mobile-drawer{display:flex}.logo{margin-bottom:2rem;font-size:3rem}.progress-container,.input-area{max-width:100%}.grid-btns{grid-template-columns:repeat(2,1fr)}}@media (max-width:480px){.play-btn{width:80px;height:80px}.input-area{gap:.5rem}.search-input{padding:.75rem 1rem}.search-input input{font-size:.8rem}.skip-btn{padding:.75rem 1rem;font-size:.85rem}}