.card{perspective:1000px;cursor:pointer;aspect-ratio:1;position:relative}.card-inner{position:relative;width:100%;height:100%;text-align:center;transition:transform .6s var(--ease-elastic);transform-style:preserve-3d}.card.flipped .card-inner,.card.matched .card-inner{transform:rotateY(180deg)}.card-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}.card-front{background:var(--bg-card);border:1px solid var(--glass-border);color:var(--primary);transform:rotateY(180deg);font-size:2rem}.card-back{background:linear-gradient(135deg,var(--glass-bg),rgba(255,255,255,.05));border:1px solid var(--glass-border);display:flex;align-items:center;justify-content:center}.card-back:after{content:"?";font-size:1.5rem;font-weight:700;opacity:.3;color:var(--text-muted)}.card.matched .card-front{box-shadow:0 0 15px var(--secondary);border-color:var(--secondary);animation:pulse 1s infinite}@keyframes pulse{0%{transform:rotateY(180deg) scale(1)}50%{transform:rotateY(180deg) scale(1.05)}to{transform:rotateY(180deg) scale(1)}}.unsplash-search{display:flex;flex-direction:column;gap:1.5rem}.search-form{width:100%}.search-input-wrapper{display:flex;align-items:center;gap:.5rem;background:var(--bg-dark);border:1px solid var(--glass-border);border-radius:.5rem;padding:.75rem}@media(max-width:600px){.search-input-wrapper{flex-direction:column;align-items:stretch}.search-button{width:100%;justify-content:center;margin-top:.5rem}}.search-icon{color:var(--text-muted);flex-shrink:0}.search-input{flex:1;background:transparent;border:none;outline:none;color:var(--text-main);font-size:1rem}.search-input::placeholder{color:var(--text-muted)}.search-button{background:var(--primary);color:#fff;border:none;padding:.5rem 1.5rem;border-radius:.375rem;font-weight:600;cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:.5rem}.search-button:hover:not(:disabled){background:var(--accent);transform:translateY(-1px)}.search-button:disabled{opacity:.6;cursor:not-allowed}.spinner{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-message{display:flex;align-items:center;gap:.5rem;padding:1rem;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:.5rem;color:#ef4444}.results-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem;max-height:400px;overflow-y:auto;padding:.5rem}.result-item{position:relative;width:100%;padding-bottom:100%;border-radius:.5rem;overflow:hidden;cursor:pointer;transition:transform .2s;background:var(--bg-dark)}.result-item:hover{transform:scale(1.05);z-index:1}.result-item.selected{border:3px solid #10b981;box-shadow:0 0 0 2px #10b98133}.selected-badge{position:absolute;top:.5rem;right:.5rem;background:#10b981;color:#fff;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;box-shadow:0 2px 8px #0000004d;z-index:10}.result-item img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;display:block}.image-overlay{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(to top,rgba(0,0,0,.8),transparent);padding:.5rem;opacity:0;transition:opacity .2s}.result-item:hover .image-overlay{opacity:1}.photographer{font-size:.75rem;color:#fff}.no-results{text-align:center;padding:2rem;color:var(--text-muted)}.unsplash-attribution{text-align:center;font-size:.75rem;color:var(--text-muted);padding-top:.5rem;border-top:1px solid var(--glass-border)}.unsplash-attribution a{color:var(--primary);text-decoration:none}.unsplash-attribution a:hover{text-decoration:underline}.load-more-button{width:100%;padding:.75rem 1.5rem;background:var(--glass-bg);border:1px solid var(--primary);color:var(--primary);border-radius:.5rem;font-weight:600;cursor:pointer;transition:all .2s;margin-top:1rem}.load-more-button:hover:not(:disabled){background:var(--primary);color:#fff;transform:translateY(-1px)}.load-more-button:disabled{opacity:.5;cursor:not-allowed}.app-container{max-width:1400px;margin:0 auto;padding:2rem;min-height:100vh;display:flex;flex-direction:column;align-items:center;gap:2rem}.main-layout{display:flex;gap:2rem;width:100%;align-items:flex-start}.game-board-container{flex:1;display:flex;justify-content:center}.header{width:100%;display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;border-radius:1rem;margin-bottom:2rem;min-height:100px}.title{font-size:2.5rem;font-weight:800;letter-spacing:-.05em}.player-stats{display:flex;align-items:center;gap:2rem;padding:1rem 3rem;border-radius:2rem;margin-bottom:2rem}.player-badge{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:.5rem 1.5rem;border-radius:1rem;opacity:.5;transition:all .3s var(--ease-elastic);border:2px solid transparent}.player-badge.active{opacity:1;background:var(--glass-highlight);border-color:var(--player-color);box-shadow:0 0 20px -5px var(--player-color);transform:scale(1.1);border-width:3px;animation:pulseProfile 2s infinite}@keyframes pulseProfile{0%{box-shadow:0 0 10px -5px var(--player-color)}50%{box-shadow:0 0 25px 5px var(--player-color)}to{box-shadow:0 0 10px -5px var(--player-color)}}.player-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;font-weight:700;color:var(--text-muted)}.player-badge.active .player-label{color:var(--player-color)}.player-score{font-size:2rem;font-weight:800}.vs-divider{font-weight:900;font-style:italic;color:var(--text-muted);opacity:.3}@media(max-width:768px){.app-container{padding:.75rem;padding-bottom:80px}.header{flex-direction:column;gap:.75rem;text-align:center;padding:1rem}.header>div:last-child{flex-wrap:wrap;justify-content:center}.header button{min-width:44px!important;min-height:44px!important;padding:.75rem!important}.header button[style*="borderRadius: '50%'"]{padding:.75rem!important}.title{font-size:2rem!important}.stats{font-size:1rem!important;flex-wrap:wrap;justify-content:center}.player-stats{gap:1rem;padding:1rem;flex-wrap:wrap}}.leaderboard-sidebar{width:100%;max-width:400px;margin:0 auto}.game-board-container{width:100%;max-width:100%}} .collapsible-footer{position:fixed;bottom:0;left:0;right:0;background:var(--bg-card);border-top:2px solid var(--glass-border);box-shadow:0 -4px 20px #0000004d;z-index:100}.footer-toggle{width:100%;display:flex;align-items:center;justify-content:center;gap:1rem;padding:1rem 2rem;background:transparent;border:none;color:var(--text-main);font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.footer-toggle:hover{background:var(--glass-bg);color:var(--primary)}.footer-toggle-text{display:flex;align-items:center;gap:.5rem}.footer-content{padding:2rem;max-height:70vh;overflow-y:auto;animation:slideUp .3s ease-out;border-top:1px solid var(--glass-border)}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem}.footer-section h4{color:var(--primary);margin-bottom:.75rem;font-size:1.1rem;font-weight:700}.footer-section ul,.footer-section ol{margin-left:1.2rem;line-height:1.8;color:var(--text-main)}.footer-section li{margin-bottom:.5rem}.footer-quote{text-align:center;padding:1.5rem;background:var(--glass-bg);border-radius:.75rem;border:1px solid var(--glass-border);font-style:italic;color:var(--text-muted);font-size:1.1rem}.footer-quote strong{color:var(--primary);font-style:normal}[data-theme=light] select,[data-theme=light] select option{color:#000!important;background:#fff;border-color:#ccc}@media(max-width:768px){.footer-grid{grid-template-columns:1fr;gap:1.5rem}.footer-content{padding:1.5rem;max-height:60vh}.footer-toggle{padding:.75rem 1rem;font-size:.9rem}}.sidebar-wrapper{display:flex;flex-direction:column;gap:1.5rem;position:sticky;top:2rem;height:fit-content;align-self:start}@media(max-width:1100px){.main-layout{flex-direction:column;align-items:center}.sidebar-wrapper{position:static;width:100%;align-self:auto;align-items:center}}.sidebar-player-badge{padding:.5rem;border-radius:.5rem;border:1px solid transparent;transition:all .2s ease}.sidebar-player-badge:hover{background:var(--glass-highlight);border-color:var(--glass-border);transform:translateY(-2px)}:root{--bg-dark: #0f172a;--bg-card: #1e293b;--primary: #06b6d4;--secondary: #d946ef;--accent: #8b5cf6;--text-main: #f8fafc;--text-muted: #94a3b8;--glass-bg: rgba(30, 41, 59, .7);--glass-border: rgba(255, 255, 255, .1);--glass-highlight: rgba(255, 255, 255, .05);--font-main: "Inter", system-ui, -apple-system, sans-serif;--ease-elastic: cubic-bezier(.68, -.55, .265, 1.55)}:root[data-theme=light]{--bg-dark: #f0f9ff;--bg-card: #ffffff;--primary: #0891b2;--secondary: #c026d3;--accent: #7c3aed;--text-main: #0f172a;--text-muted: #64748b;--glass-bg: rgba(255, 255, 255, .6);--glass-border: rgba(0, 0, 0, .1);--glass-highlight: rgba(255, 255, 255, .5)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-main);background-color:var(--bg-dark);background-image:radial-gradient(circle at 10% 20%,rgba(6,182,212,.1) 0%,transparent 20%),radial-gradient(circle at 90% 80%,rgba(217,70,239,.1) 0%,transparent 20%);color:var(--text-main);min-height:100vh;-webkit-font-smoothing:antialiased;transition:background-color .3s ease,color .3s ease}button{cursor:pointer;font-family:inherit;border:none;outline:none}.glass-panel{background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);box-shadow:0 8px 32px #0000004d}.text-gradient{color:var(--primary);font-weight:800;text-shadow:0 0 10px rgba(6,182,212,.3)}