@font-face{font-family:NotoSansJP;src:url(/fonts/NotoSansJP-VariableFont_wght.ttf) format("truetype");font-weight:100 900}:root{--cell: 52px;--tile-size: 48px;--tray-rows: 2}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:NotoSansJP,sans-serif;background:#111;color:#eee;height:100dvh;display:flex;flex-direction:column;overflow:hidden}header{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem .75rem;padding:.5rem 1rem;border-bottom:1px solid #2a2a2a;flex-shrink:0}.header-left{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.header-right{display:flex;align-items:center;gap:.5rem;flex-shrink:0;margin-left:auto}.header-center{flex:1 1 100%;display:grid;grid-template-columns:8rem minmax(0,1fr) auto;align-items:center;gap:.5rem}.back-link{color:#666;text-decoration:none;font-size:.82rem;white-space:nowrap}.back-link:hover{color:#eee}#str-input{background:#1a1a1a;border:1px solid #3a3a3a;color:#eee;padding:.32rem .65rem;border-radius:5px;font-family:inherit;font-size:.95rem;min-width:0;width:100%}#str-input:focus{outline:none;border-color:#555}select.btn{padding-right:.6rem;width:100%}.btn{background:#222;border:1px solid #3a3a3a;color:#ccc;padding:.32rem .75rem;border-radius:5px;font-family:inherit;font-size:.83rem;cursor:pointer;white-space:nowrap;transition:border-color .12s,color .12s}.btn:hover{border-color:#666;color:#eee}.btn:disabled{opacity:.35;cursor:default}.btn:disabled:hover{border-color:#3a3a3a;color:#ccc}.help-btn{width:1.6rem;height:1.6rem;border-radius:50%;background:#222;border:1px solid #3a3a3a;color:#ccc;font-family:inherit;font-size:.9rem;font-weight:700;line-height:1;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;transition:border-color .12s,color .12s}.help-btn:hover{border-color:#666;color:#eee}main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-height:0}#grid-wrap{flex:1;overflow:auto;padding:1rem;min-height:0}#grid{position:relative;background-color:#0d0d0d;background-image:linear-gradient(to right,#222 1px,transparent 1px),linear-gradient(to bottom,#222 1px,transparent 1px);background-size:var(--cell) var(--cell);display:inline-block;border:1px solid #222}.cell-hl{position:absolute;width:var(--cell);height:var(--cell);background:#63b3ff24;border:1px solid rgba(99,179,255,.32);border-radius:4px;pointer-events:none}.tile{width:var(--tile-size);height:var(--tile-size);display:flex;align-items:center;justify-content:center;font-size:clamp(11px,calc(var(--tile-size) * .56),28px);font-weight:700;background:#252525;border:1.5px solid #484848;border-radius:5px;cursor:grab;user-select:none;touch-action:none;color:#ddd;transition:background .1s,border-color .1s;flex-shrink:0}.tile:hover{background:#2e2e2e;border-color:#777;color:#fff}.tile.drag-source{opacity:.2}.tile-ghost{position:fixed;width:var(--tile-size);height:var(--tile-size);display:flex;align-items:center;justify-content:center;font-size:clamp(11px,calc(var(--tile-size) * .56),28px);font-weight:700;background:#383838;border:1.5px solid #888;border-radius:5px;color:#fff;pointer-events:none;z-index:1000;box-shadow:0 8px 28px #000000b3}#tray{flex-shrink:0;display:flex;flex-wrap:wrap;align-content:flex-start;gap:5px;padding:.6rem 1rem;border-top:1px solid #2a2a2a;height:calc(var(--tile-size) * var(--tray-rows) + 5px * (var(--tray-rows) - 1) + 1.2rem + 1px);overflow-y:auto;background:#0a0a0a}#tray-hint{color:#3a3a3a;font-size:.8rem;align-self:center;width:100%;text-align:center;pointer-events:none}.modal-overlay{display:none;position:fixed;inset:0;background:#000000b3;z-index:200;align-items:center;justify-content:center}.modal-overlay.open{display:flex}.modal-box{background:#1a1a1a;border:1px solid #3a3a3a;border-radius:10px;padding:1.4rem 1.6rem;color:#eee;font-family:inherit;width:min(480px,90vw)}.modal-box p{margin:0 0 .8rem;font-size:.9rem;color:#aaa}#load-textarea{width:100%;background:#111;border:1px solid #3a3a3a;color:#eee;padding:.5rem .65rem;border-radius:5px;font-family:inherit;font-size:1rem;resize:vertical}#load-textarea:focus{outline:none;border-color:#555}.modal-btns{display:flex;justify-content:flex-end;gap:.5rem;margin-top:.8rem}.help-box{position:relative;width:min(440px,90vw)}.help-close{position:absolute;top:.7rem;right:.9rem;background:none;border:none;color:#888;font-size:1rem;line-height:1;cursor:pointer;padding:.2rem}.help-close:hover{color:#eee}.help-title{font-size:1rem;font-weight:700;color:#eee;margin:0 0 .7rem}.help-page p{margin:0 0 .7rem;font-size:.9rem;line-height:1.75;color:#ccc}.help-page p:last-child{margin-bottom:0}.help-page .help-note{font-size:.82rem;color:#888}.help-nav{display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-top:1.1rem}#help-indicator{font-size:.82rem;color:#888}.set-preview{display:flex;flex-wrap:wrap;gap:4px;max-height:40vh;overflow-y:auto}.set-preview span{display:inline-flex;align-items:center;justify-content:center;width:1.9rem;height:1.9rem;background:#252525;border:1px solid #484848;border-radius:4px;font-size:1rem;font-weight:700;flex-shrink:0}