@media(max-width:600px){.container{padding:15px;margin:10px}h1{font-size:16px;letter-spacing:1px}.subtitle{font-size:8px}.controls{gap:8px;flex-wrap:wrap}.controls button{padding:10px 8px;font-size:8px;letter-spacing:0.5px;flex:1 1 calc(50% - 4px);min-width:0}.difficulty-content h3{font-size:14px}.diff-label{font-size:10px}.diff-value{font-size:8px}.difficulty-menu-buttons{flex-direction:column;gap:8px}.difficulty-menu-btn{max-width:100%;font-size:8px;padding:10px 12px}.tile{font-size:18px}.tile[data-value="128"],.tile[data-value="256"],.tile[data-value="512"]{font-size:16px}.tile[data-value="1024"],.tile[data-value="2048"]{font-size:14px}.tile[data-value="4096"],.tile[data-value="8192"],.tile[data-value="16384"],.tile[data-value="32768"],.tile[data-value="65536"]{font-size:12px}.game-board{gap:8px;padding:8px}.score-columns{flex-direction:column;align-items:center;gap:10px}.score-column{max-width:100%;width:100%}.score-label{font-size:8px}.score{font-size:14px}.scoreboard-content h3,.instructions-content h3{font-size:12px}.scoreboard-content{padding:12px;max-height:78vh;width:96%}.scoreboard-content h3{font-size:11px;margin-bottom:10px}.mode-selector-container{margin-bottom:10px;min-height:40px}.dropdown-selected{padding:9px 14px;font-size:9px}.instructions-content p{font-size:8px}.game-over h2{font-size:18px}.game-over p{font-size:11px}}@media(max-width:400px){h1{font-size:14px;letter-spacing:0.5px}.subtitle{font-size:7px}.score-container{padding:8px 12px}.score{font-size:12px}.score-label{font-size:7px}.controls{gap:6px}.controls button{padding:8px 6px;font-size:7px;flex:1 1 calc(50% - 3px)}.difficulty-content h3{font-size:12px}.diff-label{font-size:9px}.diff-value{font-size:7px}.tile{font-size:16px}.tile[data-value="128"],.tile[data-value="256"],.tile[data-value="512"]{font-size:14px}.tile[data-value="1024"],.tile[data-value="2048"]{font-size:12px}.tile[data-value="4096"],.tile[data-value="8192"],.tile[data-value="16384"],.tile[data-value="32768"],.tile[data-value="65536"]{font-size:10px}}