:root{--primary-color:#f97316;--accent-color:#dc2626;--bg-color:#fff;--bg-secondary:#f9fafb;--text-primary:#111827;--text-secondary:#6b7280;--border-color:#e5e7eb;--shadow:0 1px 3px 0 #0000001a, 0 1px 2px 0 #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d}*{box-sizing:border-box;margin:0;padding:0}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--text-primary);background-color:var(--bg-secondary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}#root{flex-direction:column;min-height:100vh;display:flex}.app-container{flex-direction:column;flex:1;width:100%;max-width:1200px;margin:0 auto;display:flex}.screen-content{flex:1;padding:20px 20px 80px;overflow-y:auto}.screen-header{margin-bottom:24px}.screen-title{color:var(--text-primary);margin-bottom:8px;font-size:28px;font-weight:700}.screen-subtitle{color:var(--text-secondary);font-size:16px}.tab-bar{background-color:var(--bg-color);border-top:1px solid var(--border-color);box-shadow:var(--shadow-lg);z-index:100;justify-content:space-around;padding:12px 0;display:flex;position:fixed;bottom:0;left:0;right:0}.tab-button{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;flex-direction:column;align-items:center;min-width:80px;padding:8px 16px;font-size:12px;font-weight:500;transition:all .2s;display:flex}.tab-button:hover{color:var(--primary-color);transform:translateY(-2px)}.tab-button.active{color:var(--primary-color)}.tab-icon{margin-bottom:4px;font-size:24px}.card{background-color:var(--bg-color);box-shadow:var(--shadow);border-radius:12px;margin-bottom:16px;padding:20px}.card-title{color:var(--text-primary);margin-bottom:16px;font-size:18px;font-weight:600}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px;display:grid}.stat-card{background-color:var(--bg-color);box-shadow:var(--shadow);border-left:4px solid var(--primary-color);border-radius:12px;padding:20px}.stat-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;font-size:14px}.stat-value{color:var(--primary-color);font-size:32px;font-weight:700}.stat-unit{color:var(--text-secondary);margin-left:4px;font-size:16px}.form{flex-direction:column;gap:16px;display:flex}.form-group{flex-direction:column;gap:8px;display:flex}.form-label{color:var(--text-primary);font-size:14px;font-weight:600}.form-input,.form-select,.form-textarea{border:2px solid var(--border-color);color:var(--text-primary);background-color:var(--bg-color);border-radius:8px;padding:12px;font-size:16px;transition:border-color .2s}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary-color);outline:none}.form-textarea{resize:vertical;min-height:80px;font-family:inherit}.form-row{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}.button{cursor:pointer;text-align:center;border:none;border-radius:8px;padding:14px 24px;font-size:16px;font-weight:600;transition:all .2s}.button-primary{background-color:var(--primary-color);color:#fff}.button-primary:hover{box-shadow:var(--shadow-lg);background-color:#ea580c;transform:translateY(-2px)}.button-primary:active{transform:translateY(0)}.button-secondary{background-color:var(--bg-secondary);color:var(--text-primary);border:2px solid var(--border-color)}.button-secondary:hover{border-color:var(--primary-color);color:var(--primary-color)}.button-danger{background-color:var(--accent-color);color:#fff}.button-danger:hover{background-color:#b91c1c}.workout-list{flex-direction:column;gap:12px;display:flex}.workout-item{background-color:var(--bg-color);box-shadow:var(--shadow);border-radius:8px;justify-content:space-between;align-items:center;padding:16px;transition:all .2s;display:flex}.workout-item:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.workout-info{flex:1}.workout-name{color:var(--text-primary);margin-bottom:8px;font-size:18px;font-weight:600}.workout-details{color:var(--text-secondary);gap:16px;font-size:14px;display:flex}.workout-detail{align-items:center;gap:4px;display:flex}.workout-date{color:var(--text-secondary);margin-top:4px;font-size:12px}.workout-actions{gap:8px;display:flex}.icon-button{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;border-radius:4px;padding:8px;font-size:20px;transition:all .2s}.icon-button:hover{background-color:var(--bg-secondary);color:var(--primary-color)}.icon-button.danger:hover{color:var(--accent-color)}.empty-state{text-align:center;padding:60px 20px}.empty-icon{opacity:.3;margin-bottom:16px;font-size:64px}.empty-title{color:var(--text-primary);margin-bottom:8px;font-size:20px;font-weight:600}.empty-message{color:var(--text-secondary);margin-bottom:24px;font-size:16px}.filter-bar{flex-wrap:wrap;gap:12px;margin-bottom:20px;display:flex}.filter-input{flex:1;min-width:200px}.pb-list{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;display:grid}.pb-item{background:linear-gradient(135deg, var(--primary-color) 0%, #ea580c 100%);color:#fff;box-shadow:var(--shadow);border-radius:12px;padding:20px}.pb-exercise{margin-bottom:12px;font-size:18px;font-weight:600}.pb-weight{margin-bottom:4px;font-size:36px;font-weight:700}.pb-date{opacity:.9;font-size:12px}.chart-container{width:100%;height:300px;margin-top:16px}.success-message{color:#fff;background-color:#10b981;border-radius:8px;align-items:center;gap:8px;margin-bottom:16px;padding:12px 20px;animation:.3s ease-out slideIn;display:flex}@keyframes slideIn{0%{opacity:0;transform:translateY(-100%)}to{opacity:1;transform:translateY(0)}}@media (width<=768px){.screen-content{padding:16px}.screen-title{font-size:24px}.form-row,.stat-grid{grid-template-columns:1fr}.filter-bar{flex-direction:column}.filter-input{width:100%}}