.riddle-container{max-width:100%}.riddle-loading,.riddle-error{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;gap:1.5rem;background:#fff;border-radius:12px;padding:60px 40px;border:1px solid #e8ecf0;box-shadow:0 1px 3px #0000000d}.riddle-loading{color:#64748b;font-size:1.1rem}.riddle-error{color:#dc2626;font-size:1.1rem}.riddle-card{background:#fff;border-radius:4px;padding:50px 45px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a;transition:all .2s ease;position:relative}.riddle-card:hover{box-shadow:0 4px 12px #00000014;border-color:#e0e0e0}.riddle-content{margin-bottom:35px}.riddle-text-wrapper{margin-bottom:25px}.riddle-label{font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:#64748b;margin-bottom:12px}.riddle-text{font-size:1.3rem;line-height:1.8;color:#1e293b;margin:0;font-weight:400;padding:30px 35px;background:#fafafa;border-radius:4px;border-left:3px solid #000;font-style:italic;box-shadow:0 2px 8px #0000000a;position:relative;transition:all .2s ease}.riddle-text:hover{box-shadow:0 4px 12px #00000014}.riddle-difficulty{display:flex;align-items:center;gap:12px;margin-top:20px}.difficulty-label{font-size:.95rem;color:#64748b;font-weight:500}.difficulty-badge{padding:6px 14px;border-radius:20px;font-size:.85rem;font-weight:600;text-transform:capitalize}.difficulty-easy{background:#f5f5f5;color:#000;border:1px solid #e0e0e0}.difficulty-medium{background:#fafafa;color:#000;border:1px solid #e0e0e0}.difficulty-hard{background:#f0f0f0;color:#000;border:1px solid #e0e0e0}.riddle-form{margin:35px 0}.riddle-input-wrapper{display:flex;gap:15px;align-items:stretch}.riddle-input{flex:1;padding:14px 20px;font-size:1.05rem;border:2px solid #e8ecf0;border-radius:10px;background:#fff;color:#1e293b;font-family:inherit;transition:all .3s ease}.riddle-input:focus{outline:none;border-color:#000;box-shadow:0 0 0 3px #0000000d}.riddle-input:disabled{background:#f1f5f9;color:#94a3b8;cursor:not-allowed;border-color:#e2e8f0}.riddle-input::placeholder{color:#94a3b8}.riddle-submit-btn{padding:14px 32px;background:#000;color:#fff;border:none;border-radius:4px;font-size:1.05rem;font-weight:600;cursor:pointer;transition:background .2s ease;white-space:nowrap}.riddle-submit-btn:hover:not(:disabled){background:#333}.riddle-submit-btn:disabled{opacity:.5;cursor:not-allowed}.riddle-info{margin:25px 0;padding:25px 30px;background:#fafafa;border-radius:4px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a}.attempts-info,.time-info{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:12px}.time-info{margin-top:12px;padding-top:12px;border-top:1px solid #e8ecf0}.time-label{font-size:.95rem;color:#64748b;font-weight:500}.time-value{font-size:1.1rem;font-weight:700;color:#000;padding:8px 18px;background:#f5f5f5;border-radius:4px;border:1px solid #e0e0e0;font-family:Courier New,monospace}.attempts-label{font-size:.95rem;color:#64748b;font-weight:500}.attempts-count{font-size:1.1rem;font-weight:700;color:#000;padding:8px 18px;background:#f5f5f5;border-radius:4px;min-width:70px;text-align:center;border:1px solid #e0e0e0}.attempts-count.attempts-low{color:#000;background:#fafafa;border-color:#e0e0e0}.attempts-count.attempts-none{color:#dc2626;background:linear-gradient(135deg,#fee2e2,#fecaca);box-shadow:0 2px 8px #dc26264d,inset 0 1px #ffffff80;border-color:#dc26264d}.riddle-result{margin:25px 0;padding:18px 25px;border-radius:10px;font-size:1.05rem;font-weight:500;display:flex;align-items:center;gap:12px;animation:slideIn .3s ease}.riddle-result-success{background:linear-gradient(135deg,#d1fae5,#a7f3d0);color:#065f46;border:2px solid #6ee7b7}.riddle-result-error{background:linear-gradient(135deg,#fee2e2,#fecaca);color:#991b1b;border:2px solid #fca5a5}.riddle-no-attempts{margin:25px 0;padding:20px 25px;background:#fafafa;border:1px solid #f0f0f0;border-radius:4px;text-align:center}.riddle-no-attempts p{margin:0;color:#666;font-size:1rem;font-weight:500}.riddle-success-celebration{margin:30px 0;padding:40px 30px;background:#fafafa;border:1px solid #f0f0f0;border-radius:4px;text-align:center;box-shadow:0 2px 8px #0000000a}.riddle-success-celebration p{margin:0;color:#000;font-size:1.15rem;font-weight:600}@media(max-width:768px){.riddle-page{padding:30px 15px}.riddle-card{padding:40px 30px}.riddle-text{font-size:1.15rem;padding:20px 25px}.riddle-input-wrapper{flex-direction:column}.riddle-submit-btn{width:100%}.attempts-info{flex-direction:column;align-items:flex-start;gap:10px}}@media(max-width:480px){.riddle-card{padding:30px 20px}.riddle-text{font-size:1.05rem;padding:18px 20px}.riddle-input{font-size:1rem}.riddle-submit-btn{font-size:1rem;padding:12px 24px}}@keyframes pulse{0%,to{transform:scale(1);box-shadow:0 4px 20px #3b82f633}50%{transform:scale(1.02);box-shadow:0 6px 30px #3b82f666}}.math-rush-container{max-width:100%}.math-rush-progress{background:#fff;border-radius:12px;padding:20px 30px;margin-bottom:30px;border:1px solid #e8ecf0;box-shadow:0 1px 3px #0000000d}.progress-info{display:flex;flex-direction:column;gap:12px}.progress-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px}.question-number{font-size:1rem;font-weight:600;color:#475569;display:flex;align-items:center;gap:10px}.answered-badge{font-size:.85rem;padding:4px 10px;background:#f5f5f5;color:#000;border:1px solid #e0e0e0;border-radius:4px;font-weight:600}.timer,.score-tracker{font-size:.9rem;font-weight:600;color:#000;padding:6px 12px;background:#f5f5f5;border:1px solid #e0e0e0;border-radius:4px}.score-tracker{color:#000;background:#f5f5f5}.progress-bar{width:100%;height:8px;background:#f1f5f9;border-radius:10px;overflow:hidden}.progress-fill{height:100%;background:#000;border-radius:4px;transition:width .3s ease}.math-rush-loading,.math-rush-error,.math-rush-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;gap:1.5rem;background:#fff;border-radius:12px;padding:60px 40px;border:1px solid #e8ecf0;box-shadow:0 1px 3px #0000000d}.math-rush-loading{color:#64748b;font-size:1.1rem}.math-rush-error{color:#dc2626;font-size:1.1rem}.math-rush-empty{color:#64748b;font-size:1.05rem}.math-rush-card{background:#fff;border-radius:4px;padding:45px 40px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a;transition:all .2s ease;margin-bottom:30px;position:relative}.math-rush-card:hover{box-shadow:0 4px 12px #00000014;border-color:#e0e0e0}.question-header{margin-bottom:30px;padding-bottom:25px;border-bottom:2px solid #f1f5f9}.target-answer{display:flex;align-items:center;justify-content:center;gap:15px;padding:25px 35px;background:#fafafa;border-radius:4px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a;position:relative}.target-label{font-size:1.1rem;font-weight:600;color:#000}.target-value{font-size:3rem;font-weight:800;color:#000;font-family:Courier New,monospace;position:relative;z-index:1}.expression-display{margin-bottom:35px;margin-top:30px;padding:30px 35px;background:#fafafa;border-radius:4px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a;transition:all .2s ease}.expression-display:focus-within{box-shadow:0 4px 12px #00000014;border-color:#000}.expression-label{font-size:.9rem;font-weight:600;color:#64748b;text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}.expression-value{font-size:1.5rem;font-weight:600;color:#1e293b;font-family:Courier New,monospace;min-height:40px;display:flex;align-items:center;word-break:break-all}.expression-placeholder{color:#94a3b8;font-style:italic;font-weight:400}.operands-section{margin-bottom:25px;margin-top:30px}.section-title{font-size:1rem;font-weight:600;color:#475569;margin-bottom:15px;text-align:center}.operands-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:12px}.operand-tile{padding:18px 20px;background:#000;color:#fff;border:none;border-radius:4px;font-size:1.3rem;font-weight:700;cursor:pointer;transition:background .2s ease;font-family:Courier New,monospace}.operand-tile:hover:not(:disabled){background:#333}.operand-tile.used{background:#f5f5f5;color:#666;cursor:not-allowed;opacity:.6}.operand-tile.disabled{cursor:not-allowed;opacity:.7}.operators-section{margin-bottom:30px}.operators-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:12px}.operator-tile{padding:18px 20px;background:#000;color:#fff;border:none;border-radius:4px;font-size:1.5rem;font-weight:700;cursor:pointer;transition:background .2s ease}.operator-tile:hover:not(:disabled){background:#333}.operator-tile:active:not(:disabled){transform:translateY(-1px)}.operator-tile:disabled{opacity:.5;cursor:not-allowed}.controls-section{display:flex;gap:15px;margin-bottom:25px;flex-wrap:wrap}.control-btn{flex:1;min-width:120px;padding:14px 24px;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.clear-btn{background:#f1f5f9;color:#475569;border:2px solid #e2e8f0}.clear-btn:hover:not(:disabled){background:#e2e8f0;transform:translateY(-2px);box-shadow:0 2px 8px #0000001a}.remove-btn{background:#fef3c7;color:#92400e;border:2px solid #fde68a}.remove-btn:hover:not(:disabled){background:#fde68a;transform:translateY(-2px);box-shadow:0 2px 8px #f59e0b4d}.submit-btn{background:linear-gradient(135deg,#10b981,#059669,#047857);background-size:200% 200%;color:#fff;box-shadow:0 4px 15px #10b98166,0 0 20px #10b98133;position:relative;overflow:hidden}.submit-btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ffffff4d;transform:translate(-50%,-50%);transition:width .6s,height .6s}.submit-btn:hover:not(:disabled):before{width:300px;height:300px}.submit-btn:hover:not(:disabled){background-position:100% 0;transform:translateY(-3px) scale(1.02);box-shadow:0 8px 25px #10b98180,0 0 30px #10b9814d}.control-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.result-message{margin:25px 0;padding:18px 25px;border-radius:10px;font-size:1.05rem;font-weight:500;display:flex;align-items:center;gap:12px;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.result-message.success{background:#fafafa;color:#000;border:1px solid #f0f0f0}.result-message.error{background:#fafafa;color:#666;border:1px solid #f0f0f0}.success-celebration{margin:30px 0;padding:30px 25px;background:#fafafa;border:1px solid #f0f0f0;border-radius:4px;text-align:center}.celebration-icon{font-size:4rem;margin-bottom:15px;display:block}.success-celebration p{margin:0;color:#000;font-size:1.15rem;font-weight:600}.navigation-section{display:flex;justify-content:space-between;gap:20px;margin-top:30px}.nav-btn{flex:1;padding:14px 28px;border:2px solid #e8ecf0;border-radius:10px;background:#fff;color:#475569;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.nav-btn:hover:not(:disabled){background:#fafbfc;border-color:#cbd5e1;transform:translateY(-2px);box-shadow:0 2px 8px #0000001a}.nav-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.prev-btn:hover:not(:disabled){border-color:#000;color:#000}.next-btn:hover:not(:disabled){border-color:#000;color:#000}@media(max-width:768px){.math-rush-page{padding:30px 15px}.math-rush-card{padding:35px 25px}.target-value{font-size:2rem}.expression-value{font-size:1.3rem}.operands-grid,.operators-grid{grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:10px}.operand-tile,.operator-tile{padding:15px 18px;font-size:1.2rem}.controls-section{flex-direction:column}.control-btn{width:100%}.navigation-section{flex-direction:column}}@media(max-width:480px){.math-rush-card{padding:30px 20px}.target-answer{flex-direction:column;gap:10px;padding:18px 20px}.target-value{font-size:1.8rem}.expression-value{font-size:1.15rem}.operands-grid,.operators-grid{grid-template-columns:repeat(auto-fill,minmax(60px,1fr));gap:8px}.operand-tile,.operator-tile{padding:12px 15px;font-size:1.1rem}}.game-complete-card{background:#fff;border-radius:4px;padding:50px 40px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a;margin-top:30px;text-align:center;position:relative}.completion-celebration{display:flex;flex-direction:column;align-items:center;gap:20px}.completion-celebration h2{margin:0;font-size:2rem;color:#0f172a;font-weight:600}.completion-celebration p{margin:0;font-size:1.2rem;color:#64748b}.final-score{margin-top:20px;padding:35px;background:#fafafa;border-radius:4px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a;position:relative}.score-display-large{margin-bottom:20px}.score-value-large{font-size:4.5rem;font-weight:800;color:#3b82f6;line-height:1;margin-bottom:8px;text-shadow:0 4px 15px rgba(59,130,246,.4);font-family:Courier New,monospace;animation:scorePulse 2s ease-in-out infinite;position:relative;z-index:1}@keyframes scorePulse{0%,to{transform:scale(1);text-shadow:0 4px 15px rgba(59,130,246,.4)}50%{transform:scale(1.05);text-shadow:0 6px 20px rgba(59,130,246,.6),0 0 30px rgba(59,130,246,.3)}}.score-label-large{font-size:1rem;color:#64748b;text-transform:uppercase;letter-spacing:1px;font-weight:600}.rank-display-large{font-size:1.3rem;color:#1e293b;font-weight:600}.rank-number-large{font-size:1.8rem;color:#000;font-weight:700}.auth-prompt{margin-top:30px;padding:30px;background:#fafafa;border:1px solid #f0f0f0;border-radius:4px;text-align:center}.auth-prompt h3{margin:0 0 15px;color:#000;font-size:1.5rem;font-weight:600}.auth-prompt p{margin:0 0 20px;color:#666;font-size:1rem;font-weight:500}.auth-prompt-actions{display:flex;gap:15px;justify-content:center;flex-wrap:wrap}.auth-btn{padding:12px 30px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.login-btn{background:#000;color:#fff}.login-btn:hover{background:#333}.signup-btn{background:#fff;color:#000;border:1px solid #000}.signup-btn:hover{background:#f5f5f5}.submit-score-section{margin-top:20px;padding:20px;background:#fafafa;border-radius:4px;border:1px solid #f0f0f0}.submit-score-section p{margin:0 0 15px;color:#000;font-size:1.1rem;font-weight:500}.submit-final-score-btn{padding:14px 32px;background:#000;color:#fff;border:none;border-radius:4px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:background .2s ease}.submit-final-score-btn:hover:not(:disabled){background:#333}.submit-final-score-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}