:root{font-family:"Arial Rounded MT Bold","Microsoft YaHei",sans-serif;color:#174d5c;background:#dffaf6}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:linear-gradient(145deg,#20d2c7,#c9faee 55%,#fff2b8)}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}.shell{width:min(1080px,calc(100% - 26px));margin:auto;padding:22px 0 40px}header{display:flex;align-items:center;gap:14px;background:#fffdf4;border:3px solid white;border-radius:25px;padding:13px 17px;box-shadow:0 8px 0 #82c8c2}header>div{flex:1;text-align:center}h1{margin:0;color:#ff7862;font-size:clamp(30px,6vw,50px)}header small{font-weight:900}.back,#newGame{border:0;text-decoration:none;background:#e2f7f3;border-radius:14px;padding:11px 14px;font-weight:900}#newGame{background:#ffda5c}.difficulty{display:flex;justify-content:center;gap:9px;margin:24px 0 16px}.difficulty button{border:3px solid white;border-radius:17px;background:#ebf9f6;padding:10px 18px;font-weight:900;box-shadow:0 5px 0 #82c8c2}.difficulty button small{display:block;margin-top:3px;font-weight:700}.difficulty button.active{background:#ffb18f;transform:translateY(2px);box-shadow:0 3px 0 #d97d68}.panel{background:#fffdf4;border:4px solid white;border-radius:28px;padding:16px;box-shadow:0 11px 0 #70bbb4}.status{display:grid;grid-template-columns:120px 1fr 120px;align-items:center;text-align:center;gap:10px;margin:0 auto 14px;max-width:820px}.status>div{background:#dbf5ef;border-radius:15px;padding:8px}.status span{display:block;font-size:12px}.status strong{font-size:25px}.status p{font-weight:900}.board-scroll{max-width:100%;overflow:auto;padding:7px;overscroll-behavior:contain}.board{--cell:36px;display:grid;grid-template-columns:repeat(var(--cols),var(--cell));width:max-content;margin:auto;padding:8px;gap:3px;border-radius:18px;background:#58bdb4;box-shadow:inset 0 0 0 3px rgba(255,255,255,.5);user-select:none;touch-action:pan-x pan-y}.cell{width:var(--cell);height:var(--cell);border:0;border-radius:8px;background:#d8f5ed;box-shadow:inset 0 -4px rgba(25,120,111,.18);font-weight:1000;font-size:18px}.cell:hover{filter:brightness(1.05)}.cell.revealed{background:#fffdf2;box-shadow:inset 0 0 0 1px #c5dfda;cursor:default}.cell.flagged{background:#ffe080}.cell.mine{background:#ff8377}.cell[data-n="1"]{color:#2e6fdb}.cell[data-n="2"]{color:#2a9a68}.cell[data-n="3"]{color:#e35454}.cell[data-n="4"]{color:#6953ba}.mobile-modes{display:none;justify-content:center;gap:8px;margin-bottom:12px}.mobile-modes button{border:0;border-radius:14px;background:#def4f0;padding:11px 18px;font-weight:900}.mobile-modes button.active{background:#ffcb66;box-shadow:inset 0 -4px #e5a83e}.instructions{background:rgba(255,255,255,.9);border-radius:22px;margin-top:18px;padding:16px 20px;line-height:1.55}.instructions p{margin:5px 0}@media(max-width:650px){.shell{padding-top:11px}.back span{display:none}.difficulty{overflow-x:auto;justify-content:flex-start;padding:2px}.difficulty button{flex:0 0 auto;padding:8px 13px}.panel{padding:10px}.status{grid-template-columns:76px 1fr 76px}.status p{font-size:13px}.mobile-modes{display:flex}.board{--cell:36px}.instructions{font-size:14px}}