:root{--ocean-deep: #0d3b5e;--ocean-mid: #1a5f8e;--ocean-light: #2980b9;--sand: #f5deb3;--sand-dark: #d4a84b;--coral: #e8734a;--gold: #f0c040;--parchment: #f4e4c1;--parchment-dark: #d4b896;--wood: #8b5e3c;--wood-dark: #5c3d1e;--text-dark: #2c1810;--text-light: #f5f0e8;--success: #2ecc71;--danger: #e74c3c;--cell-size: 48px;--label-size: 64px;--cell-gap: 4px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}@keyframes waveScroll{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}body{background-color:var(--ocean-deep);background-image:radial-gradient(ellipse at 20% 60%,rgba(26,95,142,.6) 0%,transparent 60%),radial-gradient(ellipse at 80% 40%,rgba(41,128,185,.4) 0%,transparent 55%),linear-gradient(160deg,var(--ocean-deep) 0%,var(--ocean-mid) 50%,var(--ocean-deep) 100%);background-size:300% 300%;animation:waveScroll 18s ease infinite;color:var(--text-light);font-family:Georgia,Times New Roman,serif;min-height:100vh;line-height:1.6}h1,h2,h3{color:var(--gold);font-weight:700;letter-spacing:.03em;text-shadow:0 1px 4px rgba(0,0,0,.5)}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.2rem}p{margin-bottom:.75rem}a{color:var(--gold);text-decoration:underline}a:hover{color:var(--sand)}button{background-color:var(--wood);color:var(--sand);border:2px solid var(--gold);border-radius:6px;padding:.5rem 1.1rem;font-family:Georgia,serif;font-size:1rem;cursor:pointer;transition:background-color .15s ease,transform .1s ease,box-shadow .15s ease;letter-spacing:.02em}button:hover{background-color:var(--wood-dark);box-shadow:0 0 8px #f0c04080}button:active{transform:translateY(1px);box-shadow:none}button:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background-color:var(--coral);border-color:var(--gold);color:var(--text-light)}.btn-primary:hover{background-color:#d4622f}.btn-secondary{background-color:var(--ocean-mid);border-color:var(--ocean-light);color:var(--text-light)}.btn-secondary:hover{background-color:var(--ocean-light)}.card{background-color:var(--parchment);color:var(--text-dark);border:2px solid var(--wood);border-radius:10px;padding:1.25rem 1.5rem;box-shadow:0 4px 16px #0006,inset 0 1px #ffffff4d}.card h1,.card h2,.card h3{color:var(--wood-dark);text-shadow:none}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background-color:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background-color:var(--parchment);color:var(--text-dark);border:3px solid var(--wood);border-radius:12px;padding:2rem;width:100%;max-width:480px;box-shadow:0 8px 32px #0009;position:relative}.modal h1,.modal h2,.modal h3{color:var(--wood-dark);text-shadow:none}.grid-cell{width:var(--cell-size);height:var(--cell-size);background-color:var(--ocean-mid);border:1.5px solid var(--gold);border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:var(--text-light);transition:background-color .15s ease,box-shadow .15s ease,transform .1s ease;-webkit-user-select:none;user-select:none}.grid-cell:hover{box-shadow:0 0 10px 2px #f0c040a6;transform:scale(1.05)}.grid-cell.miss{background-color:#1565a0;border-color:#5b9bd5;color:#a8d4f5;cursor:default}.grid-cell.miss:after{content:"💧";font-size:1.1rem}.grid-cell.miss:hover{box-shadow:none;transform:none}.grid-cell.hit{background-color:#b84a1a;border-color:var(--coral);cursor:default}.grid-cell.hit:after{content:"🔥";font-size:1.1rem}.grid-cell.hit:hover{box-shadow:none;transform:none}.grid-cell.sunk{background-color:#1a1008;border-color:#444;cursor:default}.grid-cell.sunk:after{content:"☠️";font-size:1.1rem}.grid-cell.sunk:hover{box-shadow:none;transform:none}.grid-cell.ship-bow,.grid-cell.ship-mid,.grid-cell.ship-stern,.grid-cell.ship-solo{background-color:var(--ocean-deep);border-color:var(--gold);box-shadow:0 0 8px #f0c04073;cursor:pointer}.grid-cell.ship-bow:hover,.grid-cell.ship-mid:hover,.grid-cell.ship-stern:hover,.grid-cell.ship-solo:hover{box-shadow:0 0 12px #f0c040bf;transform:none}.grid-cell.ship-bow.ship-h{border-radius:8px 0 0 8px;border-right-color:transparent}.grid-cell.ship-mid.ship-h{border-radius:0;border-left-color:transparent;border-right-color:transparent}.grid-cell.ship-stern.ship-h{border-radius:0 8px 8px 0;border-left-color:transparent}.grid-cell.ship-bow.ship-v{border-radius:8px 8px 0 0;border-bottom-color:transparent}.grid-cell.ship-mid.ship-v{border-radius:0;border-top-color:transparent;border-bottom-color:transparent}.grid-cell.ship-stern.ship-v{border-radius:0 0 8px 8px;border-top-color:transparent}.grid-cell.ship-solo{border-radius:8px}.grid-cell.ship-solo:after{content:"⚓";font-size:1rem}.grid-cell.placer-cell:hover:not(.preview-valid):not(.preview-invalid){box-shadow:none;transform:none}.grid-cell.preview-valid{background-color:#2ecc7159;border-color:#2ecc71;box-shadow:0 0 6px #2ecc7180}.grid-cell.preview-invalid{background-color:#e74c3c59;border-color:#e74c3c;box-shadow:0 0 6px #e74c3c80}.grid-cell.selected-ship{outline:2px solid var(--gold);box-shadow:0 0 14px #f0c040e6}.status-message{text-align:center;color:var(--gold);font-style:italic;font-size:1.05rem;letter-spacing:.02em;text-shadow:0 1px 3px rgba(0,0,0,.5);padding:.5rem 0}.room-code{display:inline-block;font-family:Courier New,Courier,monospace;font-size:1.8rem;font-weight:700;letter-spacing:.25em;background-color:var(--parchment);color:var(--wood-dark);border:2px solid var(--wood);border-radius:6px;padding:.3rem 1rem}@media (max-width: 600px){:root{--cell-size: 36px;--label-size: 46px;--cell-gap: 3px}.grid-cell{font-size:.6rem}.grid-cell.miss:after,.grid-cell.hit:after,.grid-cell.sunk:after{font-size:.85rem}.grid-cell.ship-solo:after{font-size:.85rem}h1{font-size:1.4rem}h2{font-size:1.1rem}.modal{margin:.75rem;padding:1.25rem;width:calc(100vw - 1.5rem)}.room-code{font-size:1.3rem}}