:root{--pink: #ff6b9d;--purple: #c44dff;--yellow: #ffd93d;--green: #6bcb77;--blue: #4d96ff;--bg: #1a1a2e;--card-bg: #16213e;--surface: #0f3460;color-scheme:dark;font-family:Segoe UI,system-ui,-apple-system,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:var(--bg);color:#fafafa}.shell{min-height:100vh;display:grid;place-items:center;padding:1.5rem}.menu-card{text-align:center;background:var(--card-bg);padding:2.5rem 2rem;border-radius:1.5rem;border:2px solid rgba(255,255,255,.08);max-width:26rem;width:100%}.menu-animals{font-size:2.5rem;letter-spacing:.3rem;margin-bottom:.75rem}.menu-card h1{margin:0 0 .25rem;font-size:2rem;background:linear-gradient(135deg,var(--pink),var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{color:#fff9;margin:0 0 1.75rem;font-size:1rem}.difficulty-buttons{display:flex;flex-direction:column;gap:.75rem}.diff-btn{border:none;border-radius:1rem;padding:.9rem 1.25rem;font-size:1.1rem;font-weight:600;cursor:pointer;transition:transform .15s,box-shadow .15s;display:flex;flex-direction:column;align-items:center;gap:.2rem}.diff-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}.diff-btn.easy{background:linear-gradient(135deg,var(--green),#2ecc71);color:#1a1a2e}.diff-btn.medium{background:linear-gradient(135deg,var(--yellow),#f0c040);color:#1a1a2e}.diff-btn.hard{background:linear-gradient(135deg,var(--pink),var(--purple));color:#fff}.diff-info{font-size:.75rem;font-weight:400;opacity:.8}.game-shell{align-content:start;gap:1.25rem}.game-header{text-align:center}.game-header h1{margin:0 0 .5rem;font-size:1.5rem}.stats{display:flex;gap:1.5rem;justify-content:center}.stat{font-size:1rem;font-weight:500;color:#fffc}.card-grid{display:grid;gap:.75rem;max-width:26rem;width:100%}.memory-card{aspect-ratio:1;border:none;border-radius:1rem;cursor:pointer;perspective:600px;padding:0;background:transparent}.memory-card:disabled{cursor:default}.card-inner{position:relative;width:100%;height:100%;transition:transform .4s ease;transform-style:preserve-3d}.memory-card.flipped .card-inner{transform:rotateY(180deg)}.card-front,.card-back{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;border-radius:1rem;backface-visibility:hidden;font-size:2.25rem}.card-front{background:linear-gradient(145deg,var(--surface),#1a3a6a);border:2px solid rgba(255,255,255,.06)}.card-front:hover{border-color:#fff3}.card-back{background:linear-gradient(145deg,#1e2a4a,#2a1e4a);border:2px solid rgba(255,255,255,.1);transform:rotateY(180deg)}.memory-card.matched .card-back{background:linear-gradient(145deg,#1a3a2a,#1a4a2a);border-color:var(--green);box-shadow:0 0 12px #6bcb774d;animation:pop .4s ease}@keyframes pop{0%{transform:rotateY(180deg) scale(1)}50%{transform:rotateY(180deg) scale(1.12)}to{transform:rotateY(180deg) scale(1)}}.win-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:grid;place-items:center;z-index:10;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.win-card{background:var(--card-bg);border-radius:1.5rem;padding:2.5rem 2rem;text-align:center;border:2px solid rgba(255,255,255,.1);animation:slideUp .4s ease;max-width:22rem;width:90%}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.win-animals{font-size:2rem;margin-bottom:.5rem}.win-card h2{margin:0 0 .5rem;font-size:1.75rem;background:linear-gradient(135deg,var(--yellow),var(--pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.win-card p{color:#ffffffb3;margin:0 0 1.5rem}.win-buttons{display:flex;gap:.75rem;justify-content:center}.win-buttons .diff-btn{padding:.7rem 1.5rem;font-size:1rem}