:root{--tennis-green: #2d7a3e;--tennis-green-dark: #1e5029;--tennis-green-light: #4a9d5f;--tennis-yellow: #d4af37;--court-clay: #c45a2a;--court-grass: #00a550;--court-hard: #2563eb;--background: #f8fafc;--card-bg: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--shadow: rgba(0, 0, 0, .1);--shadow-hover: rgba(0, 0, 0, .15)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--background);color:var(--text-primary);min-height:100vh}.App{min-height:100vh;display:flex;flex-direction:column}.header{background:linear-gradient(135deg,var(--tennis-green) 0%,var(--tennis-green-dark) 100%);color:#fff;box-shadow:0 2px 10px var(--shadow);position:sticky;top:0;z-index:100}.header-content{max-width:1200px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;gap:2rem}.logo{display:flex;align-items:center;gap:.75rem;cursor:pointer;transition:transform .2s}.logo:hover{transform:scale(1.05)}.tennis-icon{font-size:2rem;animation:bounce 2s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.logo h1{font-size:1.75rem;font-weight:700;letter-spacing:-.5px}.nav{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center}.nav button{background:transparent;border:2px solid transparent;color:#fff;padding:.5rem 1rem;border-radius:8px;cursor:pointer;font-weight:500;font-size:.95rem;transition:all .2s}.nav button:hover{background:#ffffff1a;border-color:#fff3}.nav button.active{background:#fff3;border-color:#ffffff4d}@media (max-width: 900px){.nav{gap:.25rem}.nav button{padding:.4rem .75rem;font-size:.85rem}}@media (max-width: 768px){.header-content{flex-direction:column;gap:1rem;padding:1rem}.nav{width:100%;justify-content:center}.nav button{flex:1 1 auto;min-width:fit-content}}.main-content{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:2rem}.page{animation:pageSlide .3s ease-out}@keyframes pageSlide{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.stats-banner{display:flex;gap:1rem;justify-content:center;margin-bottom:2rem}.stat-item{display:flex;align-items:center;gap:.75rem;background:var(--card-bg);padding:1rem 1.5rem;border-radius:12px;box-shadow:0 2px 8px var(--shadow)}.stat-icon{font-size:2rem}.stat-value{font-size:1.75rem;font-weight:700;color:var(--tennis-green)}.stat-label{font-size:.875rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.vote-container{max-width:1000px;margin:0 auto}.vote-title{text-align:center;font-size:2rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.vote-subtitle{text-align:center;color:var(--text-secondary);font-size:1.1rem;margin-bottom:2rem}.matchup{display:grid;grid-template-columns:1fr auto 1fr;gap:2rem;align-items:center}.court-card{background:var(--card-bg);border-radius:16px;overflow:hidden;box-shadow:0 4px 12px var(--shadow);cursor:pointer;transition:all .3s}.court-card:hover{transform:translateY(-8px);box-shadow:0 8px 24px var(--shadow-hover)}.court-image{position:relative;width:100%;padding-top:66.67%;overflow:hidden;background:var(--background)}.court-image img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}.court-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#2d7a3ef2,#1e5029f2);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}.court-card:hover .court-overlay{opacity:1}.vote-button{color:#fff;font-size:2rem;font-weight:700;padding:1rem 2rem;border:3px solid white;border-radius:50px;letter-spacing:1px;animation:pulse 2s infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.court-info{padding:1.5rem}.court-title{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem;min-height:2.6rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.court-stats{display:flex;gap:1.5rem;margin-bottom:.75rem}.court-stat{display:flex;flex-direction:column;gap:.25rem}.court-stat .stat-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.court-stat .stat-value{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.court-stat .stat-value.elo{color:var(--tennis-yellow)}.court-author{font-size:.875rem;color:var(--text-secondary);font-style:italic}.vs-divider{display:flex;align-items:center;justify-content:center}.vs-circle{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,var(--tennis-green),var(--tennis-green-dark));color:#fff;display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:700;box-shadow:0 4px 12px var(--shadow)}.page-header{text-align:center;margin-bottom:2rem}.page-header h1{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.page-header p{font-size:1.1rem;color:var(--text-secondary)}.leaderboard-list{display:flex;flex-direction:column;gap:1rem}.leaderboard-item{background:var(--card-bg);border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px var(--shadow);display:grid;grid-template-columns:60px 120px 1fr;gap:1.5rem;align-items:center;transition:all .2s}.leaderboard-item:hover{transform:translate(8px);box-shadow:0 4px 12px var(--shadow-hover)}.leaderboard-item.top-three{background:linear-gradient(135deg,var(--card-bg),rgba(212,175,55,.05));border:2px solid var(--tennis-yellow)}.rank-badge{font-size:2rem;font-weight:700;text-align:center;color:var(--tennis-green)}.court-thumbnail{width:120px;height:80px;border-radius:8px;overflow:hidden;box-shadow:0 2px 6px var(--shadow)}.court-thumbnail img{width:100%;height:100%;object-fit:cover}.court-details{display:flex;flex-direction:column;gap:.75rem}.court-metrics{display:flex;gap:2rem}.metric{display:flex;flex-direction:column;gap:.25rem}.metric-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.metric-value{font-size:1.1rem;font-weight:600;color:var(--text-primary)}.metric-value.highlight{color:var(--tennis-yellow);font-size:1.25rem}.info-page{max-width:800px;margin:0 auto}.info-content{display:flex;flex-direction:column;gap:2rem}.info-section{background:var(--card-bg);padding:2rem;border-radius:12px;box-shadow:0 2px 8px var(--shadow)}.info-section h2{color:var(--tennis-green);font-size:1.75rem;margin-bottom:1rem}.info-section h3{color:var(--text-primary);font-size:1.25rem;margin:1.5rem 0 .75rem}.info-section p{line-height:1.7;color:var(--text-secondary);margin-bottom:1rem}.info-section ul,.info-section ol{margin-left:1.5rem;line-height:1.8;color:var(--text-secondary)}.info-section li{margin-bottom:.5rem}.info-section a{color:var(--tennis-green);text-decoration:none;font-weight:500;border-bottom:1px solid transparent;transition:border-color .2s}.info-section a:hover{border-bottom-color:var(--tennis-green)}.highlight-box{background:linear-gradient(135deg,#2d7a3e0d,#1e50290d);border-left:4px solid var(--tennis-green)}.steps{display:flex;flex-direction:column;gap:1.5rem}.step{display:flex;gap:1rem;align-items:flex-start}.step-number{width:40px;height:40px;border-radius:50%;background:var(--tennis-green);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.step-content h3{margin-top:0;color:var(--text-primary)}.comparison-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:1rem 0}.comparison-item{padding:1.5rem;border-radius:8px;border:2px solid var(--border)}.comparison-item h3{margin-top:0;margin-bottom:1rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin:1rem 0}.stat-card{padding:1.5rem;border:2px solid var(--border);border-radius:8px;text-align:center}.stat-card .stat-icon{font-size:3rem;margin-bottom:.5rem}.stat-card h3{margin:.5rem 0;color:var(--tennis-green)}.stat-card p{margin:0;color:var(--text-secondary);font-size:.9rem}.formula-box{background:var(--background);padding:1.5rem;border-radius:8px;border-left:4px solid var(--tennis-yellow);margin:1rem 0}.formula-box code{display:block;background:#fff;padding:1rem;border-radius:4px;font-family:Courier New,monospace;color:var(--tennis-green);margin:.5rem 0;overflow-x:auto}.example-box{background:var(--background);padding:1.5rem;border-radius:8px;margin:1rem 0}.scenario{background:#fff;padding:1.5rem;border-radius:8px;margin-bottom:1.5rem;box-shadow:0 2px 6px var(--shadow)}.scenario h4{color:var(--tennis-green);margin-bottom:1rem}.scenario-content{display:grid;grid-template-columns:1fr auto 1fr;gap:1rem;align-items:center;margin-bottom:1rem}.before,.after{padding:1rem;background:var(--background);border-radius:6px;font-family:Courier New,monospace;font-size:.9rem}.arrow{font-size:2rem;color:var(--tennis-green)}.explanation{background:#2d7a3e1a;padding:.75rem;border-radius:6px;margin:0;font-style:italic}.tiers-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:1rem 0}.tier{padding:1.5rem;border-radius:8px;text-align:center;border:2px solid}.tier.legendary{border-color:gold;background:linear-gradient(135deg,#ffd7001a,#ffd7000d)}.tier.elite{border-color:silver;background:linear-gradient(135deg,#c0c0c01a,#c0c0c00d)}.tier.above{border-color:#cd7f32;background:linear-gradient(135deg,#cd7f321a,#cd7f320d)}.tier.average{border-color:var(--tennis-green);background:linear-gradient(135deg,#2d7a3e1a,#2d7a3e0d)}.tier.below,.tier.beginner{border-color:var(--border);background:var(--background)}.tier h3{margin:0 0 .5rem;font-size:1.1rem}.tier-range{font-size:1.25rem;font-weight:700;color:var(--tennis-green);margin:.5rem 0}.tier p{margin:0;font-size:.9rem;color:var(--text-secondary)}.benefits-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin:1rem 0}.benefit{text-align:center;padding:1rem;background:var(--background);border-radius:8px}.benefit-icon{font-size:2.5rem;margin-bottom:.5rem}.benefit h3{margin:.5rem 0;font-size:1rem}.benefit p{margin:0;font-size:.85rem;color:var(--text-secondary)}.faq{display:flex;flex-direction:column;gap:1rem}.faq-item{padding:1.5rem;background:var(--background);border-radius:8px;border-left:4px solid var(--tennis-green)}.faq-item h3{margin:0 0 .5rem;color:var(--tennis-green)}.faq-item p{margin:0}.loading-container{text-align:center;padding:4rem 2rem}.tennis-ball-loader{width:60px;height:60px;border-radius:50%;background:radial-gradient(circle at 30% 30%,var(--tennis-yellow),#b8941f);margin:0 auto 1rem;animation:spin 1s linear infinite;position:relative}.tennis-ball-loader:before{content:"";position:absolute;top:50%;left:0;right:0;height:2px;background:#fff;transform:translateY(-50%)}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-container{text-align:center;padding:4rem 2rem;background:var(--card-bg);border-radius:12px;box-shadow:0 2px 8px var(--shadow)}.error-icon{font-size:4rem;margin-bottom:1rem}.error-container h2{color:var(--text-primary);margin-bottom:1rem}.error-container code{display:inline-block;background:var(--background);padding:.5rem 1rem;border-radius:6px;font-family:Courier New,monospace;color:var(--tennis-green);margin-top:1rem}.empty-state{text-align:center;padding:4rem 2rem;color:var(--text-secondary)}.big-stat-card{background:linear-gradient(135deg,var(--tennis-green),var(--tennis-green-dark));color:#fff;padding:2rem;border-radius:12px;text-align:center;box-shadow:0 4px 12px var(--shadow)}.big-stat-card .stat-icon{font-size:3rem;margin-bottom:1rem;opacity:.9}.big-stat-card .stat-number{font-size:3rem;font-weight:700;margin-bottom:.5rem}.big-stat-card .stat-label{font-size:1.1rem;text-transform:uppercase;letter-spacing:1px;opacity:.9;margin-bottom:.5rem}.big-stat-card .stat-description{font-size:.9rem;opacity:.8}.progress-section{margin:1rem 0}.accuracy-meter{margin:1.5rem 0}.accuracy-levels{display:flex;justify-content:space-between;gap:.5rem;margin-bottom:1rem}.accuracy-level{flex:1;text-align:center;padding:1rem;border-radius:8px;background:var(--background);border:2px solid var(--border);opacity:.5;transition:all .3s}.accuracy-level.active{opacity:1;border-color:var(--tennis-green);background:#2d7a3e1a}.level-badge{font-weight:700;color:var(--tennis-green);margin-bottom:.5rem}.level-label{font-size:.85rem;color:var(--text-secondary)}.current-level{text-align:center;padding:1rem;background:var(--background);border-radius:8px;color:var(--text-primary)}.milestones{display:flex;flex-direction:column;gap:1rem}.milestone{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--background);border-radius:8px;border:2px solid var(--border);opacity:.6;transition:all .3s}.milestone.achieved{opacity:1;border-color:var(--tennis-green);background:#2d7a3e0d}.milestone-icon{font-size:2rem;flex-shrink:0}.milestone-content h3{margin:0 0 .25rem;font-size:1.1rem}.milestone-content p{margin:0;font-size:.9rem;color:var(--text-secondary)}.help-boxes{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:1rem 0}.help-box{padding:1.5rem;background:var(--background);border-radius:8px;border:2px solid var(--border)}.help-box h3{margin:0 0 .75rem;color:var(--tennis-green)}.help-box p{margin:0;font-size:.9rem}.footer{background:var(--card-bg);border-top:1px solid var(--border);margin-top:auto;padding:2rem;color:var(--text-secondary)}.footer-content{max-width:1200px;margin:0 auto;text-align:center}.footer-content p{margin-bottom:1rem}.footer-content a{color:var(--tennis-green);text-decoration:none;font-weight:500}.footer-content a:hover{text-decoration:underline}.footer-links{display:flex;justify-content:center;gap:1rem;align-items:center;flex-wrap:wrap}.footer-links button{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:0;font-size:.9rem}.footer-links button:hover{color:var(--tennis-green);text-decoration:underline}@media (max-width: 768px){.header-content{flex-direction:column;align-items:flex-start;gap:1rem}.nav{width:100%}.nav button{flex:1;text-align:center}.matchup{grid-template-columns:1fr;gap:2rem}.vs-divider{order:2}.vs-circle{transform:rotate(90deg)}.leaderboard-item{grid-template-columns:50px 1fr;gap:1rem}.court-thumbnail{grid-column:1 / -1;width:100%;height:200px}.court-metrics{flex-wrap:wrap;gap:1rem}.comparison-grid,.stats-grid,.benefits-grid{grid-template-columns:1fr}.scenario-content{grid-template-columns:1fr;gap:1rem}.arrow{transform:rotate(90deg)}.tiers-grid{grid-template-columns:1fr}.accuracy-levels{flex-direction:column}}@media (max-width: 480px){.main-content{padding:1rem}.logo h1{font-size:1.25rem}.vote-title{font-size:1.5rem}.page-header h1{font-size:2rem}.stat-item{padding:.75rem 1rem}.stat-value{font-size:1.5rem}.info-section{padding:1.5rem}}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400}body{margin:0;min-width:320px;min-height:100vh}