:root{--color-bg: #0a0a0f;--color-surface: #1a1a2e;--color-primary: #7c3aed;--color-primary-hover: #8b5cf6;--color-secondary: #3a506b;--color-text: #f8f9fa;--color-text-dim: #adb5bd;--color-success: #10b981;--color-error: #ef4444;--color-warning: #f59e0b;--kick-color: #00ff88;--kick-glow: rgba(0, 255, 136, .6);--snare-color: #00d4ff;--snare-glow: rgba(0, 212, 255, .6);--hihat-color: #ffb800;--hihat-glow: rgba(255, 184, 0, .6);--bass-color: #bf00ff;--bass-glow: rgba(191, 0, 255, .6);--grid-cell-size: 70px;--grid-gap: 10px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:linear-gradient(135deg,#0a0a0f,#1a1a2e,#0a0a0f);color:var(--color-text);min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px;position:relative;overflow-x:hidden}body:before{content:"";position:fixed;inset:0;background-image:radial-gradient(circle at 20% 50%,rgba(124,58,237,.1) 0%,transparent 50%),radial-gradient(circle at 80% 50%,rgba(16,185,129,.1) 0%,transparent 50%);pointer-events:none;z-index:0}#app{width:100%;max-width:900px;background:linear-gradient(180deg,#1a1a2ef2,#1a1a2efa);border-radius:20px;overflow:hidden;box-shadow:0 20px 60px #000000b3,0 0 100px #7c3aed1a,inset 0 1px #ffffff1a;position:relative;z-index:1;border:1px solid rgba(255,255,255,.05)}#mute-overlay{position:absolute;top:16px;right:16px;z-index:100}#mute-overlay .btn-icon{width:44px;height:44px;background-color:#ffffff1a;color:var(--color-text);font-size:1.2rem;border-radius:50%;border:none;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center}#mute-overlay .btn-icon:hover{background-color:#fff3}#mute-overlay .btn-icon.muted{color:var(--color-error)}.screen{display:none;padding:30px;flex-direction:column;align-items:center;justify-content:center;min-height:500px}.screen.active{display:flex}#title-screen{text-align:center;gap:24px}h1{font-size:3.5rem;font-weight:800;background:linear-gradient(135deg,var(--color-primary) 0%,var(--kick-color) 50%,var(--snare-color) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px;text-shadow:0 0 40px rgba(124,58,237,.3);animation:titlePulse 3s ease-in-out infinite}@keyframes titlePulse{0%,to{filter:brightness(1)}50%{filter:brightness(1.2)}}.subtitle{font-size:1.2rem;color:var(--color-text-dim);margin-bottom:32px}.instructions{max-width:500px;margin-top:20px;color:var(--color-text-dim);line-height:1.6}.difficulty-selector{width:100%;max-width:450px;margin:20px 0;animation:fadeInUp .6s ease-out .2s both}.difficulty-selector h3{font-size:1rem;color:var(--color-text-dim);margin-bottom:16px;text-transform:uppercase;letter-spacing:2px;font-weight:600}.difficulty-options{display:flex;flex-direction:column;gap:12px}.difficulty-btn{display:flex;flex-direction:column;align-items:flex-start;padding:16px 20px;background:linear-gradient(135deg,#ffffff0d,#ffffff05);border:2px solid rgba(255,255,255,.1);border-radius:14px;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);text-align:left;color:var(--color-text);position:relative;overflow:hidden}.difficulty-btn:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,var(--color-primary) 0%,var(--kick-color) 100%);opacity:0;transition:opacity .3s ease}.difficulty-btn:hover:not(:disabled){background-color:#ffffff14;border-color:var(--color-primary);transform:translateY(-2px);box-shadow:0 8px 20px #7c3aed4d}.difficulty-btn.selected{background:linear-gradient(135deg,#7c3aed4d,#10b98133);border-color:var(--color-primary);box-shadow:0 0 20px #7c3aed66,inset 0 0 20px #7c3aed1a}.difficulty-btn.selected:before{opacity:.1}.difficulty-btn.locked{opacity:.4;cursor:not-allowed;border-color:#ffffff0d}.difficulty-btn.locked:hover{transform:none;box-shadow:none}.difficulty-btn.locked .fa-lock{margin-right:6px;font-size:.9em}.difficulty-name{font-weight:700;font-size:1.1rem;margin-bottom:4px;position:relative;z-index:1}.difficulty-desc{font-size:.85rem;color:var(--color-text-dim);position:relative;z-index:1}.cell.hint-flash{animation:hintFlash .4s ease-out}@keyframes hintFlash{0%{box-shadow:0 0 #0f8c;transform:scale(1)}50%{box-shadow:0 0 30px 15px #0f89;transform:scale(1.1)}to{box-shadow:0 0 #0f80;transform:scale(1)}}.grid-container.pattern-shift-flash .target-cell{animation:patternShiftFlash .5s ease-out}@keyframes patternShiftFlash{0%{opacity:.6;background-color:#ffffffe6;transform:scale(1)}50%{opacity:1;background-color:#ffffff80;transform:scale(1.05)}to{opacity:.6;background-color:transparent;transform:scale(1)}}.feedback.success{animation:successPulse .8s ease-out;font-size:1.6rem;padding:16px 32px}@keyframes successPulse{0%{transform:scale(1);text-shadow:0 0 0 rgba(16,185,129,0)}50%{transform:scale(1.2);text-shadow:0 0 40px rgba(16,185,129,1),0 0 60px rgba(16,185,129,.8)}to{transform:scale(1);text-shadow:0 0 30px rgba(16,185,129,.6)}}@keyframes successParticles{0%{transform:translateY(0) scale(1);opacity:1}to{transform:translateY(-150px) scale(0);opacity:0}}.game-screen.success-state{animation:successScreenFlash 1.5s ease-out;background:linear-gradient(180deg,#1a1a2efa,#101e19fa)}@keyframes successScreenFlash{0%{box-shadow:inset 0 0 #10b98100;background:linear-gradient(180deg,#1a1a2efa 0% 100%)}20%{box-shadow:inset 0 0 150px 80px #10b98166;background:linear-gradient(180deg,#10281efa,#0a1e19fa)}to{box-shadow:inset 0 0 #10b98100;background:linear-gradient(180deg,#1a1a2efa 0% 100%)}}.game-screen.success-state .game-header{border-bottom-color:#10b98180}.game-screen.success-state .game-header h2{background:linear-gradient(135deg,var(--color-success) 0%,var(--kick-color) 50%,var(--snare-color) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;animation:headerCelebrate 1.5s ease-out}@keyframes headerCelebrate{0%{filter:brightness(1)}50%{filter:brightness(1.5)}to{filter:brightness(1.2)}}.particle-container{position:fixed;inset:0;pointer-events:none;z-index:1000;overflow:hidden}.particle{position:absolute;width:10px;height:10px;border-radius:50%;animation:successParticles 1.5s ease-out forwards}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.btn-primary,.btn-icon{border:none;border-radius:14px;font-family:inherit;font-weight:600;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;justify-content:center;gap:10px}.btn-primary{background:linear-gradient(135deg,var(--color-primary) 0%,var(--kick-color) 100%);color:#fff;font-size:1.2rem;padding:18px 36px;min-width:220px;box-shadow:0 4px 15px #7c3aed66,0 0 30px #7c3aed33;position:relative;overflow:hidden}.btn-primary:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s ease}.btn-primary:hover:before{left:100%}.btn-primary:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 8px 25px #7c3aed80,0 0 40px #7c3aed4d}.btn-primary:active{transform:translateY(-1px) scale(.98)}.btn-primary:disabled{background:linear-gradient(135deg,var(--color-secondary) 0%,var(--color-secondary) 100%);color:var(--color-text-dim);cursor:not-allowed;transform:none;box-shadow:none}.btn-icon{width:48px;height:48px;background:linear-gradient(135deg,#ffffff1a,#ffffff0d);color:var(--color-text);font-size:1.2rem;border-radius:50%;border:1px solid rgba(255,255,255,.1)}.btn-icon:hover{background:linear-gradient(135deg,#fff3,#ffffff1a);transform:scale(1.1);box-shadow:0 4px 15px #fff3}.btn-icon:active{transform:scale(.95)}.game-header{display:flex;justify-content:space-between;align-items:center;width:100%;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,.1)}.game-header h2{font-size:2rem;background:linear-gradient(135deg,var(--color-primary) 0%,var(--kick-color) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:700}.grid-container{position:relative;display:flex;flex-direction:column;gap:var(--grid-gap);width:fit-content;margin:0 auto;padding:25px;background:linear-gradient(135deg,#0006,#0003);border-radius:20px;border:1px solid rgba(255,255,255,.05);box-shadow:0 10px 40px #00000080,inset 0 1px #ffffff0d}.grid-row{display:flex;align-items:center;gap:20px;position:relative}.grid-row:nth-child(1){--row-color: var(--kick-color)}.grid-row:nth-child(2){--row-color: var(--snare-color)}.grid-row:nth-child(3){--row-color: var(--hihat-color)}.grid-row:nth-child(4){--row-color: var(--bass-color)}.instrument-label{width:90px;text-align:right;font-weight:700;color:var(--color-text);font-size:1rem;text-transform:uppercase;letter-spacing:1px;position:relative;padding-right:15px}.grid-row:nth-child(1) .instrument-label{color:var(--kick-color);text-shadow:0 0 10px var(--kick-glow)}.grid-row:nth-child(2) .instrument-label{color:var(--snare-color);text-shadow:0 0 10px var(--snare-glow)}.grid-row:nth-child(3) .instrument-label{color:var(--hihat-color);text-shadow:0 0 10px var(--hihat-glow)}.grid-row:nth-child(4) .instrument-label{color:var(--bass-color);text-shadow:0 0 10px var(--bass-glow)}.grid-cells{display:flex;gap:var(--grid-gap)}.cell{width:var(--grid-cell-size);height:var(--grid-cell-size);background:linear-gradient(135deg,#ffffff14,#ffffff0a);border:2px solid rgba(255,255,255,.15);border-radius:12px;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.cell:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at center,var(--row-color) 0%,transparent 70%);opacity:0;transition:opacity .2s ease}.cell:hover{background:linear-gradient(135deg,#ffffff26,#ffffff14);border-color:#ffffff4d;transform:scale(1.08);box-shadow:0 4px 15px #0000004d}.cell:active{transform:scale(.95)}.cell.active{border-color:var(--row-color);background:linear-gradient(135deg,var(--row-color) 0%,color-mix(in srgb,var(--row-color) 70%,black) 100%);box-shadow:0 0 20px var(--row-glow),0 0 40px var(--row-glow),inset 0 0 20px #fff3;transform:scale(1.05)}.cell.active:before{opacity:.3}.row-0 .cell.active{--row-color: var(--kick-color);--row-glow: var(--kick-glow)}.row-1 .cell.active{--row-color: var(--snare-color);--row-glow: var(--snare-glow)}.row-2 .cell.active{--row-color: var(--hihat-color);--row-glow: var(--hihat-glow)}.row-3 .cell.active{--row-color: var(--bass-color);--row-glow: var(--bass-glow)}.target-overlay{position:absolute;inset:0;pointer-events:none;display:flex;flex-direction:column;gap:var(--grid-gap);padding:25px 0 25px 115px;z-index:10}.target-cell{position:absolute;width:var(--grid-cell-size);height:var(--grid-cell-size);border-radius:12px;border:3px dashed rgba(255,255,255,.6);background:radial-gradient(circle at center,rgba(255,255,255,.15) 0%,transparent 70%);opacity:.7;box-shadow:0 0 10px #fff3,inset 0 0 10px #ffffff1a;animation:targetPulse 2s ease-in-out infinite}@keyframes targetPulse{0%,to{opacity:.6;border-color:#ffffff80}50%{opacity:.8;border-color:#fffc}}.target-cell:after{content:"◆";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#ffffffb3;font-size:14px}.game-footer{margin-top:30px;display:flex;flex-direction:column;align-items:center;gap:20px;position:relative}.game-actions{display:flex;align-items:center;gap:15px;justify-content:center}#play-pause-button{display:flex;width:50px;height:50px;background:linear-gradient(135deg,#ffffff1a,#ffffff0d);border:2px solid rgba(255,255,255,.2);border-radius:50%;color:var(--color-text);font-size:1.1rem;cursor:pointer;transition:all .3s ease;align-items:center;justify-content:center}#play-pause-button:hover{background:linear-gradient(135deg,#fff3,#ffffff1a);border-color:var(--color-primary);transform:scale(1.1);box-shadow:0 4px 15px #7c3aed66}#play-pause-button:active{transform:scale(.95)}.feedback{min-height:32px;font-size:1.3rem;font-weight:700;text-align:center;padding:12px 24px;border-radius:12px;transition:all .3s ease}.feedback.success{color:var(--color-success);background:linear-gradient(135deg,#10b98133,#10b9811a);border:1px solid rgba(16,185,129,.3);box-shadow:0 0 30px #10b9814d}.feedback.error{color:var(--color-error);background:linear-gradient(135deg,#ef444433,#ef44441a);border:1px solid rgba(239,68,68,.3)}.feedback.warning{color:var(--color-warning);background:linear-gradient(135deg,#f59e0b33,#f59e0b1a);border:1px solid rgba(245,158,11,.3)}.audio-status{color:var(--color-text-dim);font-size:.9rem;display:flex;align-items:center;gap:8px;padding:8px 16px;background:#ffffff0d;border-radius:20px;border:1px solid rgba(255,255,255,.1)}#error-screen{text-align:center;gap:20px}@media(max-width:1024px){:root{--grid-cell-size: 65px}#app{max-width:700px}}@media(max-width:768px){:root{--grid-cell-size: 55px;--grid-gap: 8px}.grid-container{padding:20px}.target-overlay{padding:20px 0 20px 90px}.instrument-label{width:70px;font-size:.85rem}h1{font-size:2.5rem}.game-header h2{font-size:1.5rem}.btn-primary{font-size:1.1rem;padding:16px 28px;min-width:200px}}@media(max-width:480px){:root{--grid-cell-size: 45px;--grid-gap: 6px}.screen{padding:20px 15px}.grid-container{padding:15px}.target-overlay{padding:15px 0 15px 70px}.instrument-label{width:55px;font-size:.75rem}h1{font-size:2rem}.game-header h2{font-size:1.3rem}.btn-primary{padding:14px 24px;min-width:180px;font-size:1rem}.feedback{font-size:1.1rem}}@media(min-width:1920px){:root{--grid-cell-size: 80px;--grid-gap: 12px}#app{max-width:1000px}.grid-container{padding:30px}.target-overlay{padding:30px 0 30px 130px}.instrument-label{width:100px;font-size:1.1rem}h1{font-size:4rem}}