*{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-color:#f5f5f5;color:#333}.exercise-list{max-width:1200px;margin:0 auto;padding:2rem}.exercise-list h1{text-align:center;margin-bottom:2rem;color:#333}.exercises-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.exercise-card{background:#fff;border:2px solid #e0e0e0;border-radius:12px;padding:0;text-decoration:none;color:inherit;transition:all .3s ease;cursor:pointer;overflow:hidden;display:flex;flex-direction:column}.exercise-card:hover{border-color:#4caf50;box-shadow:0 4px 12px #4caf5033;transform:translateY(-2px)}.exercise-image{width:100%;height:200px;overflow:hidden;background:linear-gradient(135deg,#667eea,#764ba2)}.exercise-image img{width:100%;height:100%;object-fit:cover}.exercise-content{padding:1.5rem}.exercise-card h2{margin:0 0 .5rem;color:#2c3e50;font-size:1.25rem}.exercise-card p{margin:0 0 1rem;color:#666;font-size:.9rem;line-height:1.4}.exercise-meta{display:flex;gap:1rem;font-size:.85rem;color:#888}.exercise-meta span{background:#f5f5f5;padding:.25rem .75rem;border-radius:12px}.timer-container{max-width:600px;margin:0 auto;padding:2rem;text-align:center}.timer-container h2{margin:0 0 2rem;color:#2c3e50}.progress-info{font-size:1.1rem;color:#666;margin-bottom:2rem;font-weight:500}.countdown-display{margin:3rem 0}.countdown-number{font-size:8rem;font-weight:700;color:#4caf50;line-height:1;margin-bottom:1rem;text-shadow:0 2px 4px rgba(0,0,0,.1)}.countdown-label{font-size:1.5rem;color:#888;text-transform:uppercase;letter-spacing:2px}.timer-stats{display:flex;justify-content:center;gap:3rem;margin-top:3rem}.stat{display:flex;flex-direction:column;gap:.5rem}.stat-label{font-size:.9rem;color:#888}.stat-value{font-size:1.25rem;font-weight:600;color:#2c3e50}.timer-container.completed{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px}.timer-container.completed h1{font-size:2.5rem;color:#4caf50;margin-bottom:1rem}.timer-container.completed p{font-size:1.25rem;color:#666;margin-bottom:2rem}.finish-btn{padding:1rem 3rem;background:#4caf50;color:#fff;border:none;border-radius:8px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:background .3s ease}.finish-btn:hover{background:#45a049}.finish-btn:active{transform:scale(.98)}.exercise-detail{max-width:900px;margin:0 auto;padding:2rem}.back-btn{background:transparent;border:none;color:#4caf50;font-size:1rem;cursor:pointer;padding:.5rem 0;margin-bottom:1rem}.back-btn:hover{text-decoration:underline}.exercise-header{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-bottom:2rem;align-items:start}.exercise-image-large{width:100%;border-radius:12px;overflow:hidden;background:linear-gradient(135deg,#667eea,#764ba2);box-shadow:0 4px 12px #0000001a}.exercise-image-large img{width:100%;height:auto;display:block}.exercise-info h1{margin:0 0 1rem;color:#2c3e50}.description{color:#666;line-height:1.6;margin-bottom:0}.exercise-details{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-bottom:2rem}.benefits-section,.instructions-section{background:#f9f9f9;border-radius:12px;padding:1.5rem}.benefits-section h3,.instructions-section h3{margin:0 0 1rem;color:#2c3e50;font-size:1.1rem}.benefits-section ul,.instructions-section ol{margin:0;padding-left:1.5rem}.benefits-section li,.instructions-section li{color:#555;line-height:1.8;margin-bottom:.5rem}@media(max-width:768px){.exercise-header,.exercise-details{grid-template-columns:1fr}}.config-section{background:#f9f9f9;border-radius:12px;padding:1.5rem;margin-bottom:2rem}.config-section h2{margin:0 0 1.5rem;font-size:1.25rem;color:#2c3e50}.config-item{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.config-item:last-child{margin-bottom:0}.config-item label{font-weight:500;color:#555}.config-item input{width:80px;padding:.5rem;border:2px solid #ddd;border-radius:6px;font-size:1rem;text-align:center}.config-item input:focus{outline:none;border-color:#4caf50}.start-btn{width:100%;padding:1rem;background:#4caf50;color:#fff;border:none;border-radius:8px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:background .3s ease}.start-btn:hover{background:#45a049}.start-btn:active{transform:scale(.98)}#root{min-height:100vh}