:root{--tile-width: 55px;--tile-height: 75px;--board-bg: #1b5e20}body{margin:0;background-color:var(--board-bg);color:#fff;font-family:Hiragino Kaku Gothic ProN,Meiryo,sans-serif;padding-top:70px;overflow-x:hidden}.status-bar{position:fixed;top:0;left:0;width:100%;height:60px;background-color:#000000e6;display:flex;align-items:center;justify-content:center;z-index:1000;box-shadow:0 2px 10px #00000080}.game-container{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;min-height:calc(100vh - 70px);padding-bottom:30px}.board{display:grid;grid-template-columns:repeat(19,var(--tile-width));gap:2px;width:fit-content;margin:0 auto}.tile.empty{visibility:hidden;pointer-events:none}.tile{background-color:#fff;border-radius:4px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 2px 4px #0006;overflow:hidden;transition:transform .1s}.tile:hover{transform:scale(1.05)}.tile img[src*="back.gif"]{width:100%;height:100%;object-fit:fill}.tile img{width:90%;height:90%;object-fit:contain}.tile.selected{outline:4px solid #ffeb3b;box-shadow:0 0 15px #ffeb3b;z-index:10}@keyframes hint-flash{0%{outline:4px solid #00ff00;box-shadow:0 0 10px #0f0}50%{outline:8px solid #00ff00;box-shadow:0 0 30px #0f0}to{outline:4px solid #00ff00;box-shadow:0 0 10px #0f0}}.tile.hint{z-index:20;animation:hint-flash .5s infinite}.menu-container{position:fixed;top:5px;right:15px;z-index:1001}.menu-button{font-size:35px;background:none;border:none;color:#fff;cursor:pointer}.menu-content{position:absolute;top:55px;right:0;background:#333;padding:20px;border-radius:8px;box-shadow:0 4px 10px #00000080;color:#fff;width:220px}.hint-btn{margin-left:30px;padding:8px 20px;font-size:18px;cursor:pointer;border-radius:8px;background-color:#4caf50;color:#fff;border:none;font-weight:700;box-shadow:0 4px #2e7d32}.hint-btn:active{box-shadow:none;transform:translateY(4px)}.start-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:10;background-color:#0006;border-radius:8px}.hero-start-btn{padding:25px 70px;font-size:36px;background-color:#ff9800;color:#fff;border:4px solid white;border-radius:20px;cursor:pointer;font-weight:700;box-shadow:0 10px 20px #00000080}.retry-btn{padding:15px 40px;font-size:24px;cursor:pointer;background-color:#2196f3;color:#fff;border:none;border-radius:12px;font-weight:700;margin-top:20px}