:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0a0a0a;color:#fafafa}.app-container{min-height:100vh;display:flex;align-items:center;justify-content:center;transition:background .5s ease}.menu-screen{text-align:center;padding:2rem;max-width:480px;width:100%}.menu-emoji{font-size:4rem;line-height:1;margin-bottom:.5rem;animation:bounce 2s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.menu-title{font-size:2.2rem;font-weight:800;margin:0;background:linear-gradient(135deg,#fff,#ffffffb3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.03em}.menu-subtitle{color:#fff9;margin:.5rem 0 1.5rem;font-size:1.05rem}.menu-coins{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:1.5rem}.coin-icon{font-size:1.3rem}.coin-amount{font-weight:700;font-size:1.2rem;color:#fbbf24;min-width:3ch}.btn-shop{background:#ffffff1a;border:1px solid rgba(255,255,255,.15);color:#fff;padding:.4rem 1rem;border-radius:999px;cursor:pointer;font-size:.85rem;transition:all .2s}.btn-shop:hover{background:#fff3}.difficulty-grid{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin-bottom:1.5rem}.diff-card{background:#ffffff0f;border:1px solid rgba(255,255,255,.1);border-radius:1rem;padding:1.25rem;cursor:pointer;transition:all .2s;color:#fff}.diff-card:hover{background:#ffffff1f;border-color:#ffffff40;transform:translateY(-2px)}.diff-name{font-weight:700;font-size:1.1rem;margin-bottom:.25rem}.diff-grid-size{font-size:.8rem;color:#ffffff80}.diff-best{font-size:.75rem;color:#fff6;margin-top:.35rem}.menu-footer{color:#fff6;font-size:.85rem}.active-theme strong{color:#ffffffb3}.game-screen{padding:1rem;width:100%;max-width:700px;display:flex;flex-direction:column;align-items:center;gap:1rem}.game-top-bar{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:560px}.btn-back{background:#ffffff1a;border:1px solid rgba(255,255,255,.12);color:#fff;padding:.4rem .9rem;border-radius:.5rem;cursor:pointer;font-size:.85rem;transition:all .2s}.btn-back:hover{background:#ffffff2e}.game-stats{display:flex;gap:1.25rem}.stat{display:flex;flex-direction:column;align-items:center}.stat-label{font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;color:#ffffff73}.stat-value{font-weight:700;font-size:1.1rem}.btn-restart{background:#ffffff1a;border:1px solid rgba(255,255,255,.12);color:#fff;width:2.2rem;height:2.2rem;border-radius:.5rem;cursor:pointer;font-size:1.2rem;display:flex;align-items:center;justify-content:center;transition:all .2s}.btn-restart:hover{background:#ffffff2e;transform:rotate(90deg)}.card-grid{display:grid;gap:10px;padding:0 1rem}.match-card{aspect-ratio:1;perspective:600px;cursor:pointer;background:none;border:none;padding:0;min-width:0}.match-card:disabled{cursor:default}.match-card-inner{position:relative;width:100%;height:100%;transition:transform .5s cubic-bezier(.4,0,.2,1);transform-style:preserve-3d}.match-card.flipped .match-card-inner{transform:rotateY(180deg)}.match-card-front,.match-card-back{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:.75rem;display:flex;align-items:center;justify-content:center;backface-visibility:hidden;-webkit-backface-visibility:hidden}.match-card-front{background:#ffffff14;border:2px solid var(--accent, #4ade80);transform:rotateY(180deg);box-shadow:0 0 20px #4ade8026}.match-card-back{background:var(--card-back, linear-gradient(135deg, #166534, #14532d));border:2px solid rgba(255,255,255,.08)}.match-card-symbol{font-size:2rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}.match-card-question{font-size:1.6rem;font-weight:700;color:#ffffff59}.match-card.matched .match-card-inner{transform:rotateY(180deg)}.match-card.matched .match-card-front{border-color:var(--accent);box-shadow:0 0 25px #4ade804d;animation:matchPulse .5s ease}@keyframes matchPulse{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;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.win-modal{background:#141414f2;border:1px solid rgba(255,255,255,.1);border-radius:1.5rem;padding:2.5rem 3rem;text-align:center;animation:scaleIn .4s cubic-bezier(.175,.885,.32,1.275)}@keyframes scaleIn{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}.win-emoji{font-size:3.5rem;margin-bottom:.5rem}.win-title{font-size:1.8rem;font-weight:800;margin:0 0 1.5rem}.win-stats{display:flex;gap:2rem;justify-content:center;margin-bottom:2rem}.win-stat{display:flex;flex-direction:column;align-items:center}.win-stat-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:#fff6}.win-stat-value{font-weight:700;font-size:1.3rem}.win-actions{display:flex;gap:.75rem;justify-content:center}.btn-win{background:linear-gradient(135deg,#4ade80,#22c55e);color:#052e16;border:none;padding:.7rem 2rem;border-radius:.75rem;font-weight:700;font-size:.95rem;cursor:pointer;transition:all .2s}.btn-win:hover{transform:translateY(-2px);box-shadow:0 4px 20px #4ade804d}.btn-win-secondary{background:#ffffff1a;color:#fff}.btn-win-secondary:hover{background:#ffffff2e;box-shadow:none}.shop-screen{padding:2rem;max-width:560px;width:100%}.shop-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}.shop-title{font-size:1.5rem;font-weight:700;margin:0}.theme-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.theme-card{border-radius:1rem;padding:1.25rem;text-align:center;border:2px solid rgba(255,255,255,.08);transition:all .2s}.theme-card.active{border-color:#fff6}.theme-card.locked{opacity:.7}.theme-card-symbols{display:flex;flex-wrap:wrap;gap:.25rem;justify-content:center;margin-bottom:.75rem}.theme-preview-emoji{font-size:1.5rem}.theme-card-name{font-size:1rem;font-weight:600;margin:0 0 .75rem}.btn-theme{background:#ffffff26;border:1px solid rgba(255,255,255,.2);color:#fff;padding:.45rem 1.25rem;border-radius:999px;cursor:pointer;font-size:.85rem;transition:all .2s}.btn-theme:hover{background:#ffffff40}.btn-theme-active{background:#ffffff40;border-color:#fff6}.btn-unlock{background:#fbbf2426;border-color:#fbbf244d;color:#fbbf24}.btn-unlock:hover{background:#fbbf2440}.btn-unlock:disabled{opacity:.5;cursor:not-allowed}@media(max-width:500px){.menu-title{font-size:1.6rem}.match-card-symbol{font-size:1.4rem}.match-card-question{font-size:1.2rem}.card-grid{gap:6px}.win-modal{padding:1.5rem;margin:1rem}.win-stats{gap:1.25rem}}