@import"https://fonts.googleapis.com/css2?family=Lobster&family=Poppins:wght@400;600;700&display=swap";:root{--bg-primary: #f8f9fa;--bg-secondary: #edf2fb;--text-primary: #1d3557;--text-secondary: #457b9d;--accent-primary: #4cc9f0;--accent-secondary: #4895ef;--accent-danger: #f72585;--card-bg: white;--card-shadow: rgba(0, 0, 0, .1);--border-color: #ddd;--equation-bg: rgba(255, 255, 255, .8);--empty-equation-text: #999;--credits-text: rgba(0, 0, 0, .5);--credits-link: rgba(0, 0, 0, .6);--credits-link-hover: rgba(0, 0, 0, .8)}.dark-mode{--bg-primary: #1a1a1a;--bg-secondary: #2d2d2d;--text-primary: #e0e0e0;--text-secondary: #b0b0b0;--accent-primary: #ff9800;--accent-secondary: #ffb74d;--accent-danger: #f72585;--card-bg: #2d2d2d;--card-shadow: rgba(0, 0, 0, .3);--border-color: #404040;--equation-bg: rgba(45, 45, 45, .8);--empty-equation-text: #808080;--credits-text: rgba(255, 255, 255, .5);--credits-link: rgba(255, 255, 255, .6);--credits-link-hover: rgba(255, 255, 255, .8)}.game-container{max-width:1000px;margin:0 auto;padding:20px;font-family:Poppins,Arial,sans-serif}.target-number-display{background-color:var(--bg-primary);border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 4px 6px var(--card-shadow);text-align:center}.target-number-display h1{text-align:center;color:var(--text-primary);margin:0 0 10px;font-family:Lobster,cursive;font-size:3rem;text-shadow:2px 2px 4px var(--card-shadow)}.target-number-display .game-message{text-align:center;font-size:1.2rem;margin-bottom:20px;color:var(--text-secondary);font-weight:600}.target-number-display h2{font-family:Poppins,sans-serif;font-weight:600;font-size:1.8rem;text-align:center;margin:20px 0 0;color:var(--text-primary);display:flex;align-items:center;justify-content:center;gap:20px}.target-number-display h2:after{content:attr(data-number);font-size:2.5rem;font-weight:700;background-color:var(--accent-primary);color:#fff;padding:10px 25px;border-radius:8px;box-shadow:0 4px 8px #00000026;display:inline-block;margin:0}.target-number-display h2 span{display:none}.target-cards{display:flex;justify-content:center;gap:10px;margin:0}.play-cards-section{background-color:var(--bg-primary);border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 4px 8px var(--card-shadow)}.play-cards-section h3{font-family:Poppins,sans-serif;font-weight:600;color:var(--text-primary);text-align:center;margin-bottom:8px;margin-top:0;font-size:1.5rem}.cards-container{display:flex;flex-wrap:wrap;justify-content:center;gap:15px;margin-top:8px}.operations-row{background-color:var(--bg-secondary);padding:15px;border-radius:8px;box-shadow:0 2px 4px var(--card-shadow);margin-top:15px}.operations-row h3{font-family:Poppins,sans-serif;font-weight:600;color:var(--text-primary);text-align:center;margin-bottom:8px;margin-top:0;font-size:1.5rem}.operations-equation-row{display:flex;flex-direction:column;gap:20px;margin-bottom:20px}.operations-container{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:8px}.operations-box,.operations-box h3{display:none}.card{width:80px;height:112px;background-color:#fff;border-radius:10px;border:none;box-shadow:0 4px 8px var(--card-shadow);margin:5px;position:relative;-webkit-user-select:none;user-select:none;cursor:grab;transition:all .2s ease}.card:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#ffffff4d,#fff0 50%);z-index:1;border-radius:10px}.card:hover{transform:translateY(-8px) rotate(2deg);box-shadow:0 8px 16px #0003}.card:active{cursor:grabbing;transform:scale(.95);box-shadow:0 2px 4px #0000001a}.card.selected{box-shadow:0 0 0 3px #4361ee,0 8px 16px #0003;transform:translateY(-8px);opacity:.5;cursor:pointer;position:relative}.card.selected:hover{opacity:.9;transform:translateY(-4px);box-shadow:0 8px 16px #0003}.card.selected:active{transform:translateY(-2px);opacity:.6}.card.selected:after{content:"×";position:absolute;top:-6px;right:-6px;width:18px;height:18px;background:#f72585;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;box-shadow:0 2px 4px #0003;opacity:0;transition:opacity .2s ease;z-index:2}.card.selected:hover:after{opacity:1;box-shadow:0 6px 12px #4caf504d}.card-corner{position:absolute;display:flex;flex-direction:column;align-items:center;font-size:16px;font-weight:700}.top-left{top:5px;left:5px}.bottom-right{bottom:5px;right:5px;transform:rotate(180deg)}.card-center-suit{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:28px}.card-suit{font-size:16px}.card-value{font-size:16px;line-height:1}.operation-button{width:50px;height:50px;font-size:1.8rem;font-weight:700;background-color:var(--accent-primary);color:#fff;border:none;border-radius:10px;cursor:grab;transition:all .2s ease;box-shadow:0 4px 6px var(--card-shadow);display:flex;justify-content:center;align-items:center;position:relative;overflow:hidden}.operation-button:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#ffffff4d,#fff0 50%);z-index:1}.operation-button:hover{background-color:var(--accent-secondary);transform:translateY(-3px);box-shadow:0 6px 8px #00000026}.operation-button:active{cursor:grabbing;transform:scale(.95);box-shadow:0 2px 4px #0000001a}.delete-button{background-color:#f72585;color:#fff}.delete-button:hover{background-color:#e5267d}.equation-display{background-color:var(--bg-primary);border-radius:12px;padding:20px;flex:2;box-shadow:0 4px 8px var(--card-shadow);display:flex;flex-direction:column}.equation-display h3{margin-top:0;margin-bottom:15px;font-family:Poppins,sans-serif;font-weight:600;color:var(--text-primary);text-align:center;font-size:1.5rem}.equation{min-height:80px;border:2px dashed var(--border-color);border-radius:10px;padding:15px;margin-bottom:15px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:5px;background-color:var(--equation-bg);position:relative;overflow:visible}.empty-equation{color:var(--empty-equation-text);font-style:italic;text-align:center;width:100%}.equation-item{display:inline-flex;justify-content:center;align-items:center;margin:0 4px;padding:8px 12px;border-radius:6px;cursor:pointer;font-weight:700;box-shadow:0 1px 3px #0000001a;transition:transform .2s ease,opacity .2s ease,box-shadow .2s ease;-webkit-user-select:none;user-select:none;position:relative;z-index:1;will-change:transform}.equation-item:after{content:"×";position:absolute;top:-6px;right:-6px;width:18px;height:18px;background:#f72585;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;box-shadow:0 2px 4px #0003;opacity:0;transition:opacity .2s ease;z-index:2}.equation-item:hover:after{opacity:1}.equation-item:hover{transform:translateY(-2px);opacity:.8}.equation-item:active{cursor:grabbing;transform:scale(.95)}.equation-item.number{background-color:#f1faee;padding:6px 14px;border-radius:6px;color:#1d3557;font-weight:700;box-shadow:0 2px 4px #0000001a}.equation-item.operation{color:#4895ef;font-weight:700;font-size:1.5rem;padding:0 5px}.equation-item.parenthesis{color:#4cc9f0;font-weight:700;font-size:2rem;padding:0 2px}.equation-item.parenthesis.unmatched{color:#f72585;animation:shake .5s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-2px)}75%{transform:translate(2px)}}.result{font-size:1.8rem;font-weight:700;margin:10px 0 15px;padding:8px 15px;border-radius:8px;color:#333;text-align:center}.result.correct{color:#4caf50;background-color:#4caf501a}.result.incorrect{color:#f44336;background-color:#f443361a}.action-buttons{display:flex;justify-content:center;gap:15px;margin-top:10px}.action-buttons button{padding:10px 20px;border:none;border-radius:8px;background-color:var(--accent-primary);color:#fff;font-weight:700;font-family:Poppins,sans-serif;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px var(--card-shadow);min-width:100px}.action-buttons button:hover{background-color:var(--accent-secondary);transform:translateY(-3px);box-shadow:0 6px 8px #00000026}.action-buttons button:active{transform:translateY(1px);box-shadow:0 2px 4px #0000001a}.action-buttons .backspace-button,.action-buttons .trash-button{display:flex;align-items:center;justify-content:center;padding:8px 15px;font-size:1.2rem;min-width:50px}.action-buttons .backspace-button{background-color:#f0ad4e}.action-buttons .backspace-button:hover{background-color:#ec971f}.action-buttons .trash-button{background-color:#d9534f}.action-buttons .trash-button:hover{background-color:#c9302c}.action-buttons .trash-button.active{background-color:#c9302c;transform:scale(1.1);box-shadow:0 6px 12px #c9302c4d}.game-over{text-align:center;margin:20px 0}.game-over button{padding:12px 24px;font-size:1.2rem;background-color:#007bff;color:#fff;border:none;border-radius:5px;cursor:pointer;margin-top:15px;transition:background-color .3s}.game-over button:hover{background-color:#0056b3}@media (min-width: 768px){.operations-equation-row{flex-direction:row;align-items:stretch}.equation-display{width:100%}}.number-button{width:45px;height:45px;font-size:1.5rem;font-weight:700;background-color:#e9ecef;border:1px solid #ced4da;border-radius:5px;cursor:pointer;transition:transform .2s,background-color .2s;margin:5px}.number-button:hover{background-color:#dee2e6;transform:translateY(-2px)}.numbers-container{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:10px}.card-numbers{background-color:#f8f9fa;border-radius:8px;padding:15px;box-shadow:0 2px 4px #0000001a;margin-bottom:15px}.confetti-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1500;overflow:hidden}.confetti-piece{position:absolute;border-radius:50%;opacity:.8}@keyframes fall{0%{transform:translateY(0) rotate(0)}to{transform:translateY(1000px) rotate(720deg);opacity:0}}.drag-ghost-container{position:fixed;pointer-events:none;z-index:1000;-webkit-user-select:none;user-select:none}.ghost-item{opacity:.8;border-style:dashed!important;border-width:2px!important;box-shadow:0 2px 6px #00000026;transform:none!important;transition:none!important}.drop-preview-container{position:absolute;display:flex;justify-content:center;align-items:center;pointer-events:none;z-index:10;margin:0;padding:0;transform:translate(-50%,-50%)}.preview-item-wrapper{display:flex;justify-content:center;align-items:center;pointer-events:none;margin:0;padding:0}.preview-item{opacity:.7;pointer-events:none;border-style:dashed!important;border-width:2px!important;box-shadow:0 2px 4px #0000001a;transform:none!important;transition:none!important;margin:0!important;min-width:fit-content}.ghost-item.number,.preview-item.number{border-color:#4cc9f0!important}.ghost-item.operation,.preview-item.operation{border-color:#1d3557!important}.ghost-item.parenthesis,.preview-item.parenthesis{border-color:#4cc9f0!important}.drag-ghost,.ghost-card,.ghost-operation,.drop-preview,.preview-card,.preview-operation,.drop-indicator{display:none}.trash-can{padding:12px 18px;background-color:#f1f1f1;border-radius:12px;display:flex;align-items:center;justify-content:center;margin:15px auto;width:220px;height:60px;transition:all .3s ease;border:2px dashed #ccc;box-shadow:0 2px 6px #0000000d}.trash-can.active{background-color:#ffebee;border-color:#f72585;transform:scale(1.05);box-shadow:0 4px 10px #f7258533}.trash-icon{font-size:28px;margin-right:12px}.trash-text{font-size:16px;color:#666;font-family:Poppins,sans-serif}.trash-can.active .trash-icon,.trash-can.active .trash-text{color:#f72585}.tabs{display:flex;justify-content:center;margin-bottom:15px}.tab-button{background-color:#f1f1f1;border:none;padding:12px 24px;font-size:1rem;cursor:pointer;transition:background-color .3s,color .3s;font-family:Poppins,sans-serif;font-weight:600;border-radius:8px 8px 0 0;margin:0 5px}.tab-button.active{background-color:#4cc9f0;color:#fff}.tab-button:hover{background-color:#e0e0e0}.tab-button.active:hover{background-color:#3db8df}.info-tooltip-container{display:inline-block;position:relative;margin-left:5px;cursor:help;vertical-align:super;font-size:smaller}.info-icon{display:flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;background-color:#4cc9f0b3;color:#fff;font-size:10px;font-weight:700;font-style:italic;box-shadow:0 1px 3px #0000001a;transition:all .2s ease;line-height:1;text-align:center;padding-bottom:-1px;padding-top:1px;padding-right:1.5px}.info-tooltip-container:hover .info-icon{background-color:#3db8dfe6;transform:scale(1.1);box-shadow:0 2px 4px #00000026}.tooltip{position:absolute;bottom:120%;left:50%;transform:translate(-50%);min-width:160px;padding:8px 12px;background-color:#1d3557e6;color:#fff;text-align:center;border-radius:6px;font-size:12px;font-weight:400;font-style:normal;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s;z-index:100;pointer-events:none;box-shadow:0 3px 6px #00000026;line-height:1.4}.tooltip:after{content:"";position:absolute;top:100%;left:50%;margin-left:-5px;border-width:5px;border-style:solid;border-color:rgba(29,53,87,.9) transparent transparent transparent}.info-tooltip-container:hover .tooltip{opacity:1;visibility:visible}.credits{text-align:center;padding:10px;margin-top:20px;color:var(--credits-text);font-size:.8rem;font-family:Poppins,sans-serif}.credits a{color:var(--credits-link);text-decoration:none;transition:color .2s ease}.credits a:hover{color:var(--credits-link-hover);text-decoration:underline}.header-row{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;margin-bottom:20px;padding-bottom:10px;border-bottom:1px solid var(--border-color)}.game-title{grid-column:1}.game-mode-indicator{grid-column:2;justify-self:center}.header-buttons{display:flex;align-items:center;gap:12px;margin-left:auto}.game-title{font-family:Lobster,cursive;font-size:2.5rem;color:var(--accent-primary);margin:0;text-shadow:none}.game-mode-indicator{display:flex;align-items:center;gap:10px}.mode-badge{display:inline-flex;align-items:center;padding:5px 12px;border-radius:20px;font-size:.9rem;font-weight:600}.mode-badge.daily{background-color:#4cc9f033;color:var(--accent-primary);border:1px solid var(--accent-primary)}.mode-badge.unlimited{background-color:#4895ef33;color:var(--accent-secondary);border:1px solid var(--accent-secondary)}.switch-mode-button{background:linear-gradient(to right,var(--accent-primary),var(--accent-secondary));border:none;color:#fff;padding:6px 14px;border-radius:20px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px #0000001a;display:flex;align-items:center;gap:5px}.switch-mode-button:hover{transform:translateY(-2px);box-shadow:0 4px 8px #00000026;filter:brightness(1.1)}.mode-switch-icon{font-size:.9rem;margin-right:4px}.header-buttons{display:flex;gap:10px}.instructions-button{background:none;border:none;cursor:pointer;font-size:1.5rem;color:var(--text-primary);transition:transform .2s ease;display:flex;align-items:center;justify-content:center;padding:8px;border-radius:50%}.instructions-button:hover{transform:rotate(30deg);background-color:#0000000d}.dark-mode .instructions-button{color:var(--text-primary)}.dark-mode .instructions-button:hover{background-color:#ffffff1a}.instructions-icon{display:inline-flex;align-items:center;justify-content:center}.dark-mode .mode-badge.daily{background-color:#ff980033;color:var(--accent-primary);border:1px solid var(--accent-primary)}.dark-mode .mode-badge.unlimited{background-color:#ffb74d33;color:var(--accent-secondary);border:1px solid var(--accent-secondary)}.dark-mode .switch-mode-button{background:linear-gradient(to right,var(--accent-primary),var(--accent-secondary));color:#fff;box-shadow:0 2px 4px #0003}.dark-mode .switch-mode-button:hover{box-shadow:0 4px 8px #0000004d;filter:brightness(1.1)}@media (max-width: 768px){.header-row{flex-direction:column;gap:15px;align-items:center}.game-mode-indicator{margin:5px 0}.mode-dropdown{min-width:200px;font-size:.9rem;padding:8px 32px 8px 14px}}@media (max-width: 480px){.game-title{font-size:2rem}.mode-dropdown{min-width:180px;font-size:.9rem;padding:8px 30px 8px 14px}.dropdown-arrow{right:12px}}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.welcome-modal{z-index:1000}.instructions-modal{z-index:1100}.solved-modal{z-index:1050}.modal-content{position:relative;background:#fff;padding:1rem;border-radius:8px;max-width:600px;width:90%;max-height:90vh;overflow:hidden}.modal-content h2{color:#1d3557;font-family:Poppins,sans-serif;font-size:1.6rem;margin:0 0 8px;text-align:center}.instructions-content{max-height:calc(90vh - 4rem);overflow-y:auto;display:flex;flex-direction:column;gap:6px;padding:0 16px 0 8px;margin-right:-8px}.instructions-content section{background-color:var(--bg-secondary);border-radius:8px;padding:8px 12px;box-shadow:0 2px 4px var(--card-shadow)}.instructions-content h3{color:var(--accent-secondary);font-size:1rem;margin:0 0 4px;font-weight:600;border-bottom:2px solid var(--accent-primary);padding-bottom:2px;display:inline-block}.instruction-rows{display:flex;flex-direction:column;gap:3px}.instruction-row{display:flex;align-items:center;gap:6px;margin:0}.instruction-icon{width:24px;height:24px;font-size:12px}.instructions-content p{color:#333;line-height:1.5;margin:0 0 15px}.instructions-content ul{list-style-type:none;padding:0;margin:0}.instructions-content li{color:#333;padding:8px 0 8px 24px;position:relative;line-height:1.4}.instructions-content li:before{content:"•";color:#4cc9f0;position:absolute;left:8px}.modal-close{display:block;width:100%;padding:12px;background-color:#4cc9f0;color:#fff;border:none;border-radius:8px;font-family:Poppins,sans-serif;font-weight:600;font-size:1.1rem;cursor:pointer;transition:all .2s ease;margin-top:20px}.modal-close:hover{background-color:#3db8df;transform:translateY(-2px);box-shadow:0 4px 8px #00000026}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.info-tooltip-container{display:none}.dark-mode .modal-content{background:#2a2a2a;color:#fff}.dark-mode .modal-content h2{color:var(--text-primary)}.dark-mode .instructions-content h3{color:var(--accent-primary)}.dark-mode .instructions-content p,.dark-mode .instructions-content li{color:var(--text-secondary)}.face-down-card{background-color:#2563eb;cursor:pointer;transition:transform .3s ease,box-shadow .3s ease;position:relative;overflow:hidden;border:2px solid rgba(255,255,255,.3)}.face-down-card:hover{transform:translateY(-8px);box-shadow:0 12px 20px #2563eb4d}.redeal-text{position:absolute;bottom:8px;left:50%;transform:translate(-50%);text-align:center;color:#fff;font-weight:700;font-size:11px;letter-spacing:.5px;background-color:#fff3;padding:3px 10px;border-radius:12px;z-index:5;box-shadow:0 2px 4px #0000001a;text-transform:uppercase;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.face-down-card:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background-image:linear-gradient(45deg,rgba(255,255,255,.15) 25%,transparent 25%,transparent 50%,rgba(255,255,255,.15) 50%,rgba(255,255,255,.15) 75%,transparent 75%,transparent);background-size:20px 20px;z-index:2}.face-down-card:after{content:"🔄";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:24px;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.2);z-index:3}.card-back-pattern{width:100%;height:100%;position:absolute;top:0;left:0;border-radius:8px;z-index:1;background-image:linear-gradient(135deg,#ffffff1a,#ffffff0d)}.dark-mode .face-down-card{background-color:#1d4ed8;border:2px solid rgba(255,255,255,.2)}.instructions-modal{max-width:650px;overflow:hidden}.instructions-modal h2{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;padding:15px 20px;margin:-20px -20px 20px;border-radius:10px 10px 0 0;font-family:Lobster,cursive;font-size:2.2rem;text-align:center;box-shadow:0 2px 5px #0000001a}.instructions-content{max-height:calc(85vh - 6rem);overflow-y:auto;display:flex;flex-direction:column;gap:6px;padding:0 16px 16px 8px;margin-right:-8px}.instructions-content section{background-color:var(--bg-secondary);border-radius:8px;padding:15px 20px;box-shadow:0 2px 4px var(--card-shadow)}.instructions-content h3{margin-top:0;margin-bottom:15px;color:var(--accent-secondary);font-size:1.5rem;font-weight:600;border-bottom:2px solid var(--accent-primary);padding-bottom:8px;display:inline-block}.instructions-content p{margin:0 0 10px;line-height:1.5;color:var(--text-primary)}.instructions-content ul{margin:0;padding-left:10px}.instructions-content li{margin-bottom:8px;padding-left:25px;position:relative;list-style-type:none;line-height:1.4;color:var(--text-primary)}.instructions-content li:before{content:"✓";position:absolute;left:0;color:var(--accent-primary);font-weight:700}.target-example{display:flex;align-items:center;justify-content:center;margin-top:4px;gap:12px}.target-label{font-size:1.2rem;font-weight:600;color:var(--text-primary)}.target-number{background-color:var(--accent-primary);color:#fff;font-size:1.8rem;font-weight:700;padding:8px 20px;border-radius:8px;box-shadow:0 3px 6px #0000001a}.example-game{display:flex;flex-direction:column;align-items:center;gap:8px}.example-cards{display:flex;gap:10px;justify-content:center;margin-bottom:0}.example-card{width:60px;height:84px;background-color:#fff;border-radius:8px;position:relative;box-shadow:0 3px 6px var(--card-shadow);display:flex;justify-content:center;align-items:center}.example-card .card-corner{position:absolute;display:flex;flex-direction:column;align-items:center;font-size:12px;line-height:1}.example-card .top-left{top:5px;left:5px}.example-card .bottom-right{bottom:5px;right:5px;transform:rotate(180deg)}.example-card .card-center-suit{font-size:24px}.example-operations{display:flex;gap:15px;margin:3px 0}.example-operation{width:32px;height:32px;background-color:var(--accent-secondary);color:#fff;display:flex;justify-content:center;align-items:center;font-size:16px;font-weight:700;border-radius:50%;box-shadow:0 3px 6px var(--card-shadow)}.example-equation{background-color:#fafeff;border-radius:8px;padding:10px 15px;margin:10px 0;display:flex;align-items:center;min-height:50px;justify-content:center}.equation-example{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:5px;border-radius:8px;justify-content:center}.equation-example .equation-item{margin:0 3px}.equation-explanation{margin-top:15px;text-align:left;font-size:.9rem;line-height:1.6}.highlight{background-color:#4cc9f026;padding:2px 5px;border-radius:3px;font-weight:600;color:var(--accent-primary)}.instruction-row{display:flex;align-items:center;margin-bottom:12px;gap:15px}.instruction-icon{width:40px;height:40px;border-radius:50%;background-color:var(--bg-primary);display:flex;justify-content:center;align-items:center;font-size:20px;box-shadow:0 2px 4px var(--card-shadow);flex-shrink:0}.instruction-row p{margin:0}.drag-icon{background-color:#4cc9f0;color:#fff}.click-icon{background-color:#4895ef;color:#fff}.parentheses-icon{background-color:#560bad;color:#fff;font-weight:700}.warning-icon{background-color:#f72585;color:#fff}.modal-close{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border:none;padding:12px 30px;border-radius:30px;cursor:pointer;font-size:1.1rem;font-weight:600;margin-top:20px;box-shadow:0 4px 8px #0000001a;transition:all .2s ease}.modal-close:hover{transform:translateY(-3px);box-shadow:0 6px 12px #00000026}.dark-mode .example-card{background-color:#fff;box-shadow:0 3px 6px #0000004d}.dark-mode .example-operation{box-shadow:0 3px 6px #0000004d}.dark-mode .example-equation{background-color:#9f9f9f40}.dark-mode .highlight{background-color:#4cc9f040}@media (max-width: 600px){.instructions-modal{max-width:90vw}.example-cards{flex-wrap:wrap;justify-content:center}.example-card{width:50px;height:70px}.example-card .card-center-suit{font-size:20px}.example-operations{flex-wrap:wrap;justify-content:center}.instructions-content h3{font-size:1.3rem}}.modal-close-x{position:absolute;top:1rem;right:1rem;background:none;border:none;font-size:1.5rem;cursor:pointer;padding:.5rem;width:2.5rem;height:2.5rem;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background-color .2s;color:var(--text-primary)}.modal-close-x:hover{background-color:#0000001a}.dark-mode .modal-close-x{color:var(--text-primary)}.rules-list{display:flex;flex-direction:column;gap:.5rem;margin:.25rem 0}.rules-list>div{line-height:1.5}.no-hover{cursor:default!important}.no-hover:hover:after{content:none!important}.small-paren{font-size:1rem!important;padding:.25rem .5rem!important}.dark-mode .modal-close-x{color:#fff}.dark-mode .modal-close-x:hover{background-color:#ffffff1a}.modal-close-x.remove-item{position:absolute;top:1rem;right:1rem;background:none;border:none;font-size:1.5rem;cursor:pointer;padding:.5rem;width:2.5rem;height:2.5rem;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background-color .2s;color:var(--text-primary);margin:0;box-shadow:none}.modal-close-x.remove-item:hover{background-color:#0000001a;transform:none;box-shadow:none}.dark-mode .modal-close-x.remove-item{border:none;color:var(--text-primary)}.dark-mode .modal-close-x.remove-item:hover{background-color:#ffffff1a}.equation-example .result{display:inline-block;font-size:1rem;margin:0 0 0 4px;padding:0;font-weight:700}.equation-example .result.correct{color:#4caf50;background:none}.dark-mode .equation-example .result.correct{color:#81c784}@media (max-width: 600px){.modal-close-x.remove-item{margin-left:calc(90vw - 16px)}}.solved-modal{max-width:600px;text-align:center;padding:30px;animation:slideIn .3s ease-out forwards;z-index:1100}.solved-modal h2{color:var(--accent-primary);font-size:2.5rem;margin-bottom:20px;text-shadow:0 2px 4px rgba(0,0,0,.1)}.solved-content{display:flex;flex-direction:column;align-items:center;gap:20px}.solved-content p{font-size:1.2rem;margin-bottom:10px}.solved-equation{width:100%;padding:5px;margin:20px 0;display:flex;justify-content:center}.equation-solution{display:flex;flex-direction:column;align-items:center;padding:20px;max-width:90%;background-color:#fff;border-radius:10px;box-shadow:0 3px 6px #0000001a}.equation-text{font-size:1.8rem;font-weight:500;margin-top:15px;padding:10px;color:var(--accent-primary);text-align:center;word-wrap:break-word;max-width:100%}.dark-mode .equation-text{color:#4cc9f0}.operations-count{font-size:1.2rem;margin-top:15px;font-weight:500;color:#555}.dark-mode .operations-count{color:#bbb}.equation-items-container{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-top:15px}.dark-mode .equation-solution{background-color:#3a3a3a}.equation-solution .equation-item{margin:2px;flex-shrink:0;font-size:1.2rem}.equation-solution .result{margin-left:8px}.solved-equation h3{color:var(--accent-primary);font-size:1.3rem;text-align:center;margin-top:0;margin-bottom:5px}.solved-actions{display:flex;justify-content:center;gap:20px;margin-top:20px;padding:10px 0 15px}.continue-btn{background:linear-gradient(135deg,#62b6cb,#1b4965)}.continue-btn:hover{background:linear-gradient(135deg,#71c4d8,#245f7f)}.dark-mode .solved-modal{background-color:#2a2a2a;color:#f0f0f0}.dark-mode .solved-equation{background-color:#2a2a2a}.dark-mode .continue-btn{background:linear-gradient(135deg,#4a9bb0,#0e334e)}.dark-mode .continue-btn:hover{background:linear-gradient(135deg,#60b5ca,#1b4965)}@media (max-width: 600px){.solved-modal{max-width:90%;padding:20px}.solved-actions{flex-direction:column;align-items:center;gap:15px}.action-button,.play-unlimited-btn{width:100%;max-width:250px}}.welcome-modal{max-width:500px;padding:30px;text-align:center}.welcome-modal h2{font-size:2.8rem;margin-bottom:20px;color:var(--accent-primary);font-family:Lobster,cursive;text-shadow:none}.welcome-content{display:flex;flex-direction:column;align-items:center}.welcome-content p{margin-bottom:20px;font-size:1.2rem;color:var(--text-primary)}.game-mode-buttons{display:flex;flex-direction:column;gap:15px;width:100%;margin-bottom:25px}.game-mode-button{display:flex;flex-direction:column;align-items:center;padding:15px 20px;border-radius:10px;border:2px solid var(--border-color);background-color:var(--card-bg);transition:all .2s ease;cursor:pointer}.game-mode-button:hover{transform:translateY(-3px);box-shadow:0 5px 15px #0000001a}.daily-mode{border-color:var(--accent-primary)}.daily-mode:hover{background-color:#4cc9f01a}.unlimited-mode{border-color:var(--accent-secondary)}.unlimited-mode:hover{background-color:#4895ef1a}.mode-icon{font-size:2rem;margin-bottom:5px}.mode-title{font-size:1.3rem;font-weight:600;margin-bottom:5px;color:var(--text-primary)}.mode-description{font-size:.9rem;color:var(--text-secondary)}.how-to-play-button{padding:15px 24px;font-size:1rem;background-color:var(--card-bg);color:var(--text-primary);border:2px solid var(--border-color);border-radius:10px;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;margin-top:5px}.how-to-play-button:hover{background-color:var(--bg-primary);transform:translateY(-3px);box-shadow:0 5px 15px #0000001a}.dark-mode .welcome-modal,.dark-mode .game-mode-button{background-color:var(--bg-secondary)}.dark-mode .daily-mode:hover{background-color:#ff98001a}.dark-mode .unlimited-mode:hover{background-color:#ffb74d1a}.dark-mode .how-to-play-button{background-color:var(--bg-primary)}.dark-mode .how-to-play-button:hover{background-color:#2d2d2dcc}@media (max-width: 600px){.welcome-modal{max-width:90%;padding:20px}.welcome-modal h2{font-size:2.2rem}.game-mode-button{padding:12px 15px}.mode-title{font-size:1.1rem}}.mode-dropdown-container{position:relative;width:auto}.mode-dropdown{appearance:none;-webkit-appearance:none;-moz-appearance:none;background-color:var(--accent-primary);color:#fff;padding:10px 36px 10px 16px;border-radius:10px;border:none;font-family:Poppins,Arial,sans-serif;font-size:.95rem;font-weight:600;cursor:pointer;box-shadow:0 4px 6px var(--card-shadow);transition:all .2s ease;min-width:180px;width:100%;position:relative;overflow:hidden}.mode-dropdown:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#ffffff4d,#fff0 50%);z-index:1;pointer-events:none}.mode-dropdown:hover{background-color:var(--accent-secondary);transform:translateY(-3px);box-shadow:0 6px 8px #00000026}.mode-dropdown:focus{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px var(--accent-primary)}.dropdown-arrow{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:#fff;font-size:.8rem;font-weight:700;pointer-events:none;z-index:2}.dark-mode .mode-dropdown{background-color:var(--accent-primary);color:#fff;box-shadow:0 4px 6px #00000040}.dark-mode .mode-dropdown:hover{background-color:var(--accent-secondary);box-shadow:0 6px 8px #0000004d}.dark-mode .mode-dropdown:focus{box-shadow:0 0 0 2px var(--bg-primary),0 0 0 4px var(--accent-primary)}.mode-dropdown option{background-color:var(--bg-primary);color:var(--text-primary);font-weight:400;padding:10px;font-family:Poppins,Arial,sans-serif}.dark-mode .mode-dropdown option{background-color:var(--bg-secondary);color:var(--text-primary)}.mode-dropdown:active{transform:scale(.98);box-shadow:0 2px 4px #0000001a}.play-unlimited-btn{background:linear-gradient(135deg,#4cc9f0,#3a86ff);color:#fff;font-weight:700;font-family:Poppins,sans-serif;border:none;padding:12px 24px;border-radius:8px;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px var(--card-shadow);min-width:180px;text-align:center;letter-spacing:.5px}.play-unlimited-btn:hover{background:linear-gradient(135deg,#90e0ef,#4895ef);transform:translateY(-3px);box-shadow:0 6px 8px #00000026}.play-unlimited-btn:active{transform:translateY(1px);box-shadow:0 2px 4px #0000001a}.dark-mode .play-unlimited-btn{background:linear-gradient(135deg,#4a9bb0,#0e334e);box-shadow:0 2px 4px #0000004d}.dark-mode .play-unlimited-btn:hover{background:linear-gradient(135deg,#60b5ca,#1b4965);box-shadow:0 6px 8px #0006}.action-button{background:linear-gradient(135deg,#4cc9f0,#3a86ff);color:#fff;font-weight:700;font-family:Poppins,sans-serif;border:none;padding:12px 24px;border-radius:8px;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px var(--card-shadow);min-width:140px;text-align:center;letter-spacing:.5px}.action-button:hover{background:linear-gradient(135deg,#90e0ef,#4895ef);transform:translateY(-3px);box-shadow:0 6px 8px #00000026}.action-button:active{transform:translateY(1px);box-shadow:0 2px 4px #0000001a}.dark-mode .action-button{background:linear-gradient(135deg,#4a9bb0,#0e334e);box-shadow:0 2px 4px #0000004d}.dark-mode .action-button:hover{background:linear-gradient(135deg,#60b5ca,#1b4965);box-shadow:0 6px 8px #0006}.rectangular-btn{border-radius:4px!important;transition:all .2s ease;box-shadow:0 2px 4px #0000001a}.rectangular-btn:hover{transform:translateY(-2px);box-shadow:0 4px 8px #00000026}.daily-completion{margin-top:20px;background-color:#fff;padding:15px;border-radius:10px;border:1px solid var(--border-color);text-align:center;position:relative}.completion-message{font-size:1.1rem;color:var(--text-primary);margin-bottom:5px;font-weight:500}.copy-message-btn{position:absolute;bottom:10px;right:10px;background-color:transparent;color:var(--accent-primary);border:none;width:40px;height:40px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;padding:8px}.copy-message-btn svg{width:24px;height:24px;fill:currentColor;display:block}.copy-message-btn:hover{background-color:#4cc9f01a;transform:translateY(0)}.dark-mode .daily-completion{background-color:var(--card-bg);border-color:var(--border-color)}.dark-mode .completion-message{color:var(--text-primary)}.dark-mode .copy-message-btn{color:var(--accent-primary)}.dark-mode .copy-message-btn:hover{background-color:#4cc9f01a}.game-type-toggle{display:flex;align-items:center;justify-content:flex-end;margin:0 0 0 auto;padding-right:10px}.game-type-button{position:relative;width:70px;height:32px;background:var(--bg-secondary);border-radius:16px;border:none;cursor:pointer;transition:all .3s ease;overflow:hidden;box-shadow:inset 0 0 5px #0003;padding:0;display:flex;align-items:center}.game-type-button:before{content:"";position:absolute;top:3px;left:3px;width:26px;height:26px;background:var(--accent-primary);border-radius:50%;transition:transform .3s ease,background-color .3s ease;z-index:2;box-shadow:0 2px 4px #0003}.game-type-button.active:before{transform:translate(38px);background:var(--accent-secondary)}.game-type-text{position:absolute;width:100%;text-align:center;font-size:.7rem;font-weight:700;color:var(--text-primary);transition:opacity .3s ease;-webkit-user-select:none;user-select:none}.game-type-text.left{left:5px;opacity:1}.game-type-text.right{right:5px;opacity:0}.game-type-button.active .game-type-text.left{opacity:0}.game-type-button.active .game-type-text.right{opacity:1}.dark-mode .game-type-button{background:#444}@media (max-width: 600px){.game-type-button{font-size:.85rem;padding:6px 12px}}.game-types{display:flex;flex-direction:column;gap:15px;margin-top:10px}.game-type{background-color:var(--bg-primary);border-radius:8px;padding:12px 15px;box-shadow:0 2px 4px var(--card-shadow)}.game-type h4{color:var(--accent-primary);margin:0 0 8px;font-size:1.1rem}.game-type p{margin:0;font-size:.95rem}.dark-mode .game-type{background-color:#333}.example-title{font-weight:600;margin-bottom:10px;color:var(--accent-primary)}.example-target{margin:10px 0;font-weight:600}.examples{display:flex;flex-direction:column;gap:20px}.example{background-color:var(--bg-primary);border-radius:8px;padding:15px;box-shadow:0 2px 4px var(--card-shadow)}.example-solution{margin-top:10px;font-style:italic}.dark-mode .example{background-color:#333}@media (min-width: 768px){.game-types{flex-direction:row}.game-type{flex:1}.examples{flex-direction:row}.example{flex:1}}@media (max-width: 600px){.header-row{grid-template-columns:1fr auto;grid-template-rows:auto auto;gap:10px}.game-title{grid-column:1;grid-row:1}.header-buttons{grid-column:2;grid-row:1;justify-self:end}.game-mode-indicator{grid-column:1 / span 2;grid-row:2;justify-self:center}}.instructions-modal .modal-content{padding:0;overflow:hidden}.settings-button{background:none;border:none;cursor:pointer;font-size:1.5rem;color:var(--text-primary);transition:transform .2s ease;display:flex;align-items:center;justify-content:center;padding:8px;border-radius:50%}.settings-button:hover{transform:rotate(30deg);background-color:#0000000d}.dark-mode .settings-button{color:var(--text-primary)}.dark-mode .settings-button:hover{background-color:#ffffff1a}.settings-modal{max-width:450px}.setting-row{display:flex;justify-content:space-between;align-items:center;padding:.5rem 1rem;border-radius:8px}.setting-label{display:flex;align-items:center;gap:10px}.setting-icon{font-size:1.2rem}.setting-name{font-size:1.1rem;font-weight:500}.setting-control{display:flex;align-items:center}.settings-switch{position:relative;width:70px;height:32px;background:var(--bg-secondary);border-radius:16px;border:none;cursor:pointer;transition:all .3s ease;overflow:hidden;box-shadow:inset 0 0 5px #0003;padding:0;display:flex;align-items:center}.settings-switch:before{content:"";position:absolute;top:3px;left:3px;width:26px;height:26px;background:var(--accent-primary);border-radius:50%;transition:transform .3s ease,background-color .3s ease;z-index:2;box-shadow:0 2px 4px #0003}.settings-switch.active:before{transform:translate(38px);background:var(--accent-secondary)}.switch-text{position:absolute;width:100%;text-align:center;font-size:.7rem;font-weight:700;color:var(--text-primary);transition:opacity .3s ease;-webkit-user-select:none;user-select:none}.switch-text.left{left:5px;opacity:1}.switch-text.right{right:5px;opacity:0}.dark-mode .setting-row:hover{background-color:#3a3a3a}.settings-modal{max-width:500px;padding-bottom:1.5rem}.settings-content{padding:1rem 0;display:flex;flex-direction:column;gap:1.5rem}.setting-row{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;border-radius:12px;transition:background-color .2s ease;position:relative}.setting-row:hover{background-color:var(--bg-secondary)}.setting-label{display:flex;align-items:center;gap:12px;flex:1}.setting-icon{font-size:1.4rem;display:flex;align-items:center;justify-content:center;width:32px;height:32px}.setting-name{font-size:1.1rem;font-weight:600;color:var(--text-primary)}.setting-description{font-size:.85rem;color:var(--text-secondary);margin-left:8px;font-style:italic;display:none}.setting-control{display:flex;align-items:center;position:relative}.settings-switch{position:relative;width:80px;height:34px;background:var(--bg-secondary);border-radius:17px;border:none;cursor:pointer;transition:all .3s ease;overflow:hidden;box-shadow:inset 0 0 5px #0003;padding:0;display:flex;align-items:center}.settings-switch:before{content:"";position:absolute;top:3px;left:3px;width:28px;height:28px;background:var(--accent-primary);border-radius:50%;transition:transform .3s cubic-bezier(.175,.885,.32,1.275),background-color .3s ease;z-index:2;box-shadow:0 2px 6px #00000040}.settings-switch.active:before{transform:translate(46px);background:var(--accent-secondary)}.switch-text{position:absolute;text-align:center;font-size:.75rem;font-weight:700;color:var(--text-primary);transition:opacity .3s ease;-webkit-user-select:none;user-select:none;text-shadow:0 1px 2px rgba(0,0,0,.1)}.switch-text.left{left:8px;opacity:1}.switch-text.right{right:8px;opacity:0}.settings-switch.active .switch-text.left{opacity:0}.settings-switch.active .switch-text.right{opacity:1}.tooltip-container{position:relative}.settings-tooltip{position:absolute;top:-45px;right:0;background-color:var(--bg-primary);color:var(--text-primary);padding:8px 12px;border-radius:6px;font-size:.85rem;box-shadow:0 3px 10px #0003;opacity:0;transform:translateY(10px);transition:opacity .3s ease,transform .3s ease;pointer-events:none;white-space:nowrap;z-index:100;width:max-content;max-width:200px;border:1px solid var(--border-color)}.tooltip-container:hover .settings-tooltip{opacity:1;transform:translateY(0)}.settings-tooltip:after{content:"";position:absolute;bottom:-8px;right:15px;border-left:8px solid transparent;border-right:8px solid transparent;border-top:8px solid var(--bg-primary)}.game-mode-description{margin-top:1rem;padding:1rem;border-radius:12px;background-color:var(--bg-secondary)}.game-mode-description h3{margin:0 0 .75rem;font-size:1.1rem;color:var(--text-primary);font-weight:600}.mode-explanation-container{position:relative;min-height:120px}.mode-explanation{position:absolute;width:100%;opacity:0;transform:translate(20px);transition:opacity .3s ease,transform .3s ease;pointer-events:none}.mode-explanation.active{opacity:1;transform:translate(0);pointer-events:auto}.mode-explanation h4{margin:0 0 .5rem;font-size:1rem;color:var(--accent-primary)}.mode-explanation p{margin:0;font-size:.9rem;line-height:1.5;color:var(--text-primary)}.dark-mode .settings-switch{background:#444}.dark-mode .setting-row:hover,.dark-mode .game-mode-description{background-color:#ffffff0d}.dark-mode .mode-explanation h4{color:var(--accent-secondary)}@media (max-width: 600px){.settings-modal{max-width:90%;padding:1rem}.settings-tooltip{top:auto;bottom:-45px;max-width:150px;font-size:.8rem;white-space:normal;text-align:center}.settings-tooltip:after{top:-8px;bottom:auto;border-bottom:8px solid var(--bg-primary);border-top:none}.mode-explanation-container{min-height:160px}}.App{text-align:center;min-height:100vh;background-color:var(--bg-secondary);display:flex;flex-direction:column;transition:background-color .3s ease}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .3s ease}body.dark-mode{background-color:#121212}button{cursor:pointer}.card,button{-webkit-user-select:none;user-select:none}.App-header{background-color:var(--bg-primary);min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:calc(10px + 2vmin);color:var(--text-primary)}.App-link{color:var(--accent-primary)}@keyframes App-logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}@media (max-width: 768px){.header-row{flex-direction:column;gap:15px;align-items:center}.game-mode-indicator{margin:5px 0}.mode-dropdown{min-width:200px;font-size:.9rem;padding:8px 32px 8px 14px}.card,.operation-button,.equation-item{min-height:44px;min-width:44px}.card{width:65px;height:91px;margin:3px}.card-center-suit{font-size:1.5rem;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.card-corner{font-size:.9rem;padding:4px}.card-corner .card-suit{display:none}.top-left{top:2px;left:2px}.bottom-right{bottom:2px;right:2px}.card:hover,.operation-button:hover,.equation-item:hover{transform:none;box-shadow:0 4px 8px var(--card-shadow)}.card:active,.operation-button:active,.equation-item:active{transform:scale(.95);box-shadow:0 2px 4px var(--card-shadow)}.operations-container{gap:8px}.operation-button{width:45px;height:45px;font-size:1.2rem;border-radius:6px;margin:2px;padding:0;box-shadow:0 2px 4px var(--card-shadow)}.equation-display{margin-bottom:15px;padding:10px}.equation-display h3{font-size:1.3rem;margin-bottom:8px}.equation{padding:10px 8px;min-height:60px;border-radius:8px;width:95%;margin:0 auto}.equation-item{margin:0 3px;padding:5px 6px;font-size:1rem;border-radius:6px;min-width:auto}.equation-item.operation,.equation-item.parenthesis{font-size:1rem;padding:5px 6px;min-width:auto}.result{margin-top:10px;font-size:1.1rem;padding:6px 10px}.cards-container{gap:8px}.ghost-item,.preview-item{font-size:1.1rem;padding:6px 10px;border-radius:6px}.preview-item-wrapper{height:2.5rem}.action-buttons{gap:10px;margin-top:10px}.action-buttons button{padding:8px 14px;font-size:.9rem}.trash-can{width:80px;height:40px;padding:5px}.trash-icon{font-size:1.1rem}.trash-text{font-size:.8rem}.drag-ghost-container{z-index:1000;pointer-events:none;transform:scale(1.1);opacity:.9;box-shadow:0 5px 15px #0000004d}.dragging-active{background-color:#4cc9f01a}.operations-row{padding:10px;margin-top:10px;border-radius:8px}.operations-container{gap:8px;padding:5px}.play-cards-section{padding:15px;margin-bottom:15px}}@media (max-width: 480px){.game-title{font-size:1.8rem}.mode-dropdown{padding:6px 30px 6px 12px;font-size:.85rem}.dropdown-arrow{font-size:.8rem}.card{width:55px;height:77px;margin:2px}.card-center-suit{font-size:1.3rem}.card-corner{font-size:.8rem;padding:2px}.top-left{top:1px;left:1px}.bottom-right{bottom:1px;right:1px}.operations-row{padding:6px;margin-top:6px;border-radius:6px}.operations-container{gap:4px;padding:2px}.operation-button{width:38px;height:38px;font-size:1rem;border-radius:4px;margin:1px;padding:0;box-shadow:0 1px 3px var(--card-shadow)}.play-cards-section{padding:10px;margin-bottom:10px}.equation-display{padding:6px;margin-bottom:8px}.equation-display h3{font-size:1.1rem;margin-bottom:5px}.equation{padding:5px 4px;min-height:40px;width:95%;border-radius:6px;margin:0 auto}.equation-item{margin:0 1px;padding:3px 4px;font-size:.85rem;border-radius:4px;min-width:auto}.equation-item.number{padding:3px 4px;min-width:auto}.equation-item.operation,.equation-item.parenthesis{font-size:.85rem;padding:3px 4px;margin:0 1px;min-width:auto}.empty-equation{font-size:.9rem}.result{margin-top:8px;font-size:1rem;padding:4px 8px}.ghost-item,.preview-item{font-size:.85rem;padding:3px 4px;border-radius:4px;min-width:auto}.preview-item-wrapper{height:1.8rem}.play-cards-section h3,.operations-row h3{font-size:1.1rem;margin-bottom:6px}.action-buttons{gap:8px;margin-top:8px}.action-buttons button{padding:6px 12px;font-size:.85rem}}@supports (-webkit-touch-callout: none){.card,.operation-button,.equation-item{-webkit-touch-callout:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}.drag-ghost-container{transform:translateZ(0)}.card-container,.operations-container,.equation{-webkit-user-select:none;user-select:none}}