:root{--primary: #A0C4FF;--bg: #F0F4F8;--white: #FFFFFF;--text: #2D3436;--accent: #A0C4FF;--radius: 24px;--shadow: 0 10px 40px rgba(0, 0, 0, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg);color:var(--text);display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;margin:0;overflow-x:hidden}#root{width:100%;max-width:500px;height:100vh;padding:10px;display:flex;flex-direction:column;justify-content:center}.card{background:var(--white);border-radius:var(--radius);padding:min(1.5rem,3vh);box-shadow:var(--shadow);text-align:center;max-height:98vh;display:flex;flex-direction:column;justify-content:center;align-items:center;position:relative}.nav-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;width:100%}.title{font-size:min(1.5rem,4vh);margin:0;font-weight:800;color:#555}.icon-btn{background:#f1f2f6;border:none;border-radius:12px;padding:10px;cursor:pointer;color:#555;transition:all .2s;display:flex;align-items:center;justify-content:center;text-decoration:none;font-size:1.2rem}.icon-btn:active{transform:scale(.95)}.score-board{font-size:min(1.1rem,2.5vh);font-weight:600;margin-bottom:2vh;color:#666;background:#f8f9fa;padding:8px;border-radius:10px;width:100%}.score-board span{color:var(--primary);font-size:1.3rem}.game-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px!important;perspective:1200px;width:min(90vw,45vh)!important;margin-bottom:2vh!important}.memory-card{width:100%;aspect-ratio:1/1;cursor:pointer;position:relative}.card-inner{position:relative;width:100%;height:100%;transition:transform .6s cubic-bezier(.175,.885,.32,1.275);transform-style:preserve-3d}.memory-card.flipped .card-inner{transform:rotateY(180deg)}.memory-card.matched{opacity:.6;cursor:default}.memory-card.matched .card-inner{transform:rotateY(180deg) scale(.95)}.card-front,.card-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px #0000000d;border:1px solid rgba(0,0,0,.05)}.card-front{background-color:#fff;transform:rotateY(180deg)}.card-back{background-color:var(--primary);position:relative;overflow:hidden}.pattern-overlay{position:absolute;width:100%;height:100%;background-image:radial-gradient(rgba(255,255,255,.3) 2px,transparent 2px);background-size:15px 15px}.win-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:90%;max-width:400px;background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:2rem;border-radius:var(--radius);display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:20;box-shadow:0 20px 40px #0003;animation:popIn .4s cubic-bezier(.175,.885,.32,1.275)}@keyframes popIn{0%{transform:translate(-50%,-50%) scale(.8);opacity:0}to{transform:translate(-50%,-50%) scale(1);opacity:1}}.congrats{font-size:2.5rem;font-weight:800;color:var(--text);margin-bottom:10px}.final-score{font-size:1.2rem;color:#666;margin-bottom:25px}.restart-btn{background:var(--primary);color:#fff;border:none;padding:15px 40px;border-radius:15px;font-size:1.1rem;font-weight:700;width:100%;cursor:pointer;box-shadow:0 4px 15px #a0c4ff66}.ad-container{width:100%;min-height:100px;background:#f1f2f6;border-radius:12px;margin-top:1.5vh;display:flex;justify-content:center;align-items:center;border:1px dashed #ced4da;padding:10px}