@media(max-width:800px){body>div[style*="display: flex"]{flex-direction:column!important;gap:0!important;align-items:stretch!important}.sidebar{display:none!important}.container{max-width:100%;order:1}}.mode-button:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.2)}#nitro-four-colors-leaderboard{min-height:250px}@media(max-width:990px){#nitro-four-colors-leaderboard{min-height:90px}}@media(max-width:750px){#nitro-four-colors-leaderboard{min-height:100px}}.container{margin:40px auto;background:#fff;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,8%);padding:24px}h1{text-align:center;margin-bottom:24px}#status,#game-status{text-align:center;margin:12px 0;font-size:1.1em}.board{display:grid;grid-template-columns:repeat(7,70px);grid-template-rows:repeat(6,70px);gap:8px;justify-content:center;margin:20px 0;background:#5b7a9e;padding:12px;border-radius:12px;cursor:pointer}.cell{width:70px;height:70px;background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.2em;transition:background .2s;position:relative;pointer-events:none}.cell.column-hover:not(.red):not(.yellow):not(.preview-piece){background:#bbdefb}.cell.preview-piece.preview-red{background:#e85d75;opacity:.75}.cell.preview-piece.preview-yellow{background:#f4a261;opacity:.75}.cell.red{background:#e85d75;color:#fff}.cell.yellow{background:#f4a261;color:#fff}#restart{display:block;margin:0 auto;padding:8px 24px;font-size:1em;border-radius:6px;border:none;background:#07c;color:#fff;cursor:pointer}#restart:hover{background:#005fa3}@media(max-width:600px){.container{margin:20px auto;padding:16px;border-radius:8px}h1{font-size:1.5em;margin-bottom:16px}.board{grid-template-columns:repeat(7,48px);grid-template-rows:repeat(6,48px);gap:6px;padding:8px;margin:12px 0}.cell{width:48px;height:48px;font-size:1.5em}#status,#game-status{font-size:1em;margin:8px 0}}@media(max-width:400px){.container{margin:10px;padding:12px}h1{font-size:1.3em}.board{grid-template-columns:repeat(7,40px);grid-template-rows:repeat(6,40px);gap:5px;padding:6px}.cell{width:40px;height:40px;font-size:1.2em}}