body{margin:0;padding:0;background:#000;color:#fff;font-family:Arial,sans-serif}.app-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0}.centered{text-align:center}.title{font-size:3em;margin-bottom:20px;color:#0f0}.subtitle{font-size:1.2em;margin-bottom:30px;line-height:1.6}.green-text{color:#0f0}.moves-text{color:#888;font-size:.85em}.primary-button{padding:15px 40px;font-size:1.5em;background:#0f0;color:#000;border:none;border-radius:8px;cursor:pointer;font-weight:700;margin-bottom:20px;transition:transform .1s ease}.primary-button:hover{transform:scale(1.05)}.full-width{width:100%}.stats-bar{margin-bottom:20px;display:flex;gap:40px;justify-content:center;font-size:1.2em}.grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;width:90vw;max-width:500px}.card-item{aspect-ratio:1;position:relative;cursor:pointer;perspective:600px}.card-inner{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .35s ease;border-radius:8px}.card-item.is-flipped .card-inner,.card-item.is-matched .card-inner{transform:rotateY(180deg)}.card-front,.card-back{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:8px;backface-visibility:hidden;display:flex;align-items:center;justify-content:center;border:2px solid #555}.card-front{background:#333;transition:background .1s}.card-item:not(.is-matched):not(.is-flipped):hover .card-front{background:#444}.card-front-dot{width:8px;height:8px;border-radius:50%;background:#555}.card-back{background:#111;border-color:#0f0;transform:rotateY(180deg);font-size:1.8em}.card-item.is-matched .card-back{background:#0a1a0a;border-color:#0a0;opacity:.6;cursor:default}@keyframes shake{0%,to{transform:rotateY(180deg) translate(0)}20%{transform:rotateY(180deg) translate(-5px)}40%{transform:rotateY(180deg) translate(5px)}60%{transform:rotateY(180deg) translate(-4px)}80%{transform:rotateY(180deg) translate(4px)}}.card-item.is-shaking .card-inner{animation:shake .45s ease}.card-item.is-shaking .card-back{background:#1a0000;border-color:red}.card{background:#111;padding:20px;border-radius:8px;border:2px solid #0f0}.card-large{padding:30px}.score-row{display:flex;justify-content:space-between;padding:10px}.score-row:not(:last-child){border-bottom:1px solid #333}.game-over-title{font-size:3em;margin-bottom:30px;color:#0f0}input{padding:12px;font-size:1.2em;width:100%;margin-bottom:15px;background:#222;color:#fff;border:2px solid #0f0;border-radius:8px;outline:none;box-sizing:border-box}input:focus{box-shadow:0 0 8px #0f0}.new-score{animation:highlightScore 1s ease-in-out alternate;background:#00ff001a}@keyframes highlightScore{0%{transform:scale(1);box-shadow:0 0 #0f0}to{transform:scale(1.05);box-shadow:0 0 15px #0f0}}.reset-button{margin-top:12px;padding:6px 12px;border-radius:6px;border:1px solid #666;background:transparent;color:#ccc;cursor:pointer}.reset-button:hover{color:#fff;border-color:#fff}.top-bar{padding:20px}.back-button{text-decoration:none;color:#0f0;border:1px solid #0f0;padding:6px 12px;border-radius:8px;font-weight:600;transition:all .2s ease}.back-button:hover{background:#0f0;color:#000}