.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--spacing-lg);background:linear-gradient(135deg,#1a1f2e,#2d3548)}.auth-card{background:var(--bg-secondary);border-radius:var(--radius-xl);padding:2.5rem;width:100%;max-width:420px;box-shadow:var(--shadow-xl);animation:fadeIn .3s ease-in-out}.auth-header{text-align:center;margin-bottom:2rem}.auth-title{font-size:2rem;font-weight:700;margin-bottom:.5rem;display:flex;align-items:center;justify-content:center;gap:.5rem}.auth-icon{font-size:1.75rem}.auth-welcome{font-size:1.75rem;font-weight:600;margin-bottom:.5rem}.auth-subtitle{color:var(--text-secondary);font-size:.95rem}.auth-form{display:flex;flex-direction:column;gap:1.25rem}.input-wrapper{position:relative;display:flex;align-items:center}.input-icon{position:absolute;left:1rem;font-size:1.1rem;opacity:.7}.input-wrapper input{padding-left:3rem}.password-wrapper{position:relative;display:flex;align-items:center}.password-toggle{position:absolute;right:1rem;background:none;border:none;cursor:pointer;font-size:1.2rem;padding:.25rem;opacity:.7;transition:opacity var(--transition-base)}.password-toggle:hover{opacity:1}.forgot-password{font-size:.875rem;color:var(--text-secondary);text-align:right;margin-top:.25rem}.forgot-password:hover{color:var(--accent-blue)}.error-message{background:#ef44441a;border:1px solid rgba(239,68,68,.3);color:#fca5a5;padding:.75rem 1rem;border-radius:var(--radius-md);font-size:.9rem;margin-bottom:1rem}.btn-register{background:var(--accent-teal);color:#fff;padding:.875rem;font-size:1rem;font-weight:600;border-radius:var(--radius-md);margin-top:.5rem;transition:all var(--transition-base)}.btn-register:hover:not(:disabled){background:#2eb87a;transform:translateY(-2px);box-shadow:0 4px 12px #3ecf8e4d}.btn-login{background:var(--accent-blue);color:#fff;padding:.875rem;font-size:1rem;font-weight:600;border-radius:var(--radius-md);margin-top:.5rem;transition:all var(--transition-base)}.btn-login:hover:not(:disabled){background:#3a7bc8;transform:translateY(-2px);box-shadow:0 4px 12px #4a90e24d}.btn-register:disabled,.btn-login:disabled{opacity:.6;cursor:not-allowed;transform:none}.auth-footer{text-align:center;margin-top:1.5rem;color:var(--text-secondary);font-size:.9rem}.auth-footer a{color:var(--accent-teal);font-weight:500;text-decoration:none}.auth-footer a:hover{color:var(--accent-blue);text-decoration:underline}@media(max-width:480px){.auth-card{padding:2rem 1.5rem}.auth-title{font-size:1.75rem}.auth-welcome{font-size:1.5rem}}.navbar{position:fixed;left:0;top:0;height:100vh;width:250px;background:var(--bg-secondary);display:flex;flex-direction:column;padding:var(--spacing-lg);box-shadow:2px 0 10px #0000001a;z-index:100}.navbar-header{margin-bottom:2rem}.navbar-brand{display:flex;align-items:center;gap:.75rem}.brand-icon{font-size:2rem}.brand-text h2{font-size:1.5rem;font-weight:700;margin:0;color:var(--text-primary)}.brand-text p{font-size:.75rem;color:var(--text-muted);margin:0}.user-profile{display:flex;align-items:center;gap:.75rem;padding:1rem;background:var(--bg-card);border-radius:var(--radius-lg);margin-bottom:2rem}.user-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--accent-blue),var(--accent-purple));display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:600;color:#fff}.user-info{flex:1;min-width:0}.user-name{font-weight:600;font-size:.95rem;margin:0;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-email{font-size:.8rem;color:var(--text-muted);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav-links{flex:1;display:flex;flex-direction:column;gap:.5rem}.nav-link{display:flex;align-items:center;gap:.75rem;padding:.875rem 1rem;border-radius:var(--radius-md);color:var(--text-secondary);text-decoration:none;font-weight:500;transition:all var(--transition-base);background:transparent;border:none;width:100%;text-align:left;cursor:pointer}.nav-link:hover{background:var(--bg-card);color:var(--text-primary)}.nav-link.active{background:var(--accent-blue);color:#fff}.nav-icon{font-size:1.25rem;display:flex;align-items:center;justify-content:center;width:24px}.nav-label{font-size:.95rem}.navbar-footer{margin-top:auto;padding-top:1rem;border-top:1px solid var(--border-color)}.logout-btn{color:#ef4444}.logout-btn:hover{background:#ef44441a;color:#dc2626}@media(max-width:768px){.navbar{width:70px;padding:var(--spacing-md)}.brand-text,.user-info,.nav-label{display:none}.navbar-brand{justify-content:center}.user-profile{justify-content:center;padding:.75rem}.nav-link{justify-content:center;padding:.875rem}}.page-container{display:flex;min-height:100vh;background:var(--bg-primary)}.main-content{flex:1;margin-left:250px;padding:2rem;overflow-y:auto}.dashboard{max-width:1400px;margin:0 auto}.dashboard-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:2rem}.dashboard-header h1{font-size:2rem;margin-bottom:.5rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-bottom:2rem}.stat-card{background:var(--bg-secondary);padding:1.5rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:transform var(--transition-base)}.stat-card:hover{transform:translateY(-2px)}.stat-card h3{font-size:.9rem;color:var(--text-secondary);margin-bottom:.75rem;font-weight:500}.stat-value{font-size:2rem;font-weight:700;color:var(--text-primary);margin:0}.stat-card.highlight{background:linear-gradient(135deg,var(--bg-secondary) 0%,rgba(62,207,142,.1) 100%);border:1px solid rgba(62,207,142,.2)}.stat-highlight{color:var(--accent-teal)}.dashboard-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:1.5rem}.workout-history-card,.progress-chart-card{background:var(--bg-secondary);padding:1.5rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.card-header h2{font-size:1.25rem;font-weight:600}.link-btn{background:none;border:none;color:var(--accent-blue);font-size:.9rem;font-weight:500;cursor:pointer;transition:color var(--transition-base)}.link-btn:hover{color:#3a7bc8;text-decoration:underline}.workout-list{display:flex;flex-direction:column;gap:1rem}.workout-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--bg-card);border-radius:var(--radius-md);transition:background var(--transition-base)}.workout-item:hover{background:var(--hover-bg)}.workout-icon{font-size:1.75rem;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);border-radius:var(--radius-md)}.workout-details{flex:1}.workout-details h4{font-size:1rem;font-weight:600;margin:0 0 .25rem}.workout-details p{font-size:.875rem;color:var(--text-muted);margin:0}.workout-date{font-size:.875rem;color:var(--text-secondary)}.chart-tabs{display:flex;gap:.5rem;background:var(--bg-card);padding:.25rem;border-radius:var(--radius-md)}.tab-btn{padding:.5rem 1rem;background:transparent;border:none;color:var(--text-secondary);font-size:.875rem;font-weight:500;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-base)}.tab-btn:hover{color:var(--text-primary)}.tab-btn.active{background:var(--accent-blue);color:#fff}.chart-container{height:300px;margin-top:1rem}.empty-state,.empty-chart{display:flex;align-items:center;justify-content:center;height:200px;color:var(--text-muted);font-size:.95rem}.loading{display:flex;justify-content:center;align-items:center;height:100vh;font-size:1.25rem;color:var(--text-secondary)}@media(max-width:1024px){.dashboard-grid{grid-template-columns:1fr}}@media(max-width:768px){.main-content{margin-left:70px;padding:1rem}.dashboard-header{flex-direction:column;gap:1rem}.dashboard-header button{width:100%}.stats-grid{grid-template-columns:1fr}}.workouts-page{max-width:1400px;margin:0 auto}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.page-header h1{font-size:2rem}.workout-form-card{background:var(--bg-secondary);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:2rem}.workout-form-card h2{font-size:1.5rem;margin-bottom:1.5rem}.workout-form{display:flex;flex-direction:column;gap:1.5rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-size:.9rem;font-weight:500;color:var(--text-secondary)}.range-value{display:inline-block;margin-top:.5rem;font-weight:600;color:var(--accent-blue)}input[type=range]{-webkit-appearance:none;appearance:none;height:6px;background:var(--bg-card);border-radius:3px;outline:none;padding:0}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;background:var(--accent-blue);border-radius:50%;cursor:pointer}input[type=range]::-moz-range-thumb{width:18px;height:18px;background:var(--accent-blue);border-radius:50%;cursor:pointer;border:none}.exercises-section{background:var(--bg-card);padding:1.5rem;border-radius:var(--radius-md)}.exercises-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.exercises-header h3{font-size:1.125rem;margin:0}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.exercise-row{display:grid;grid-template-columns:2fr 1fr 1fr 1fr auto;gap:1rem;align-items:end;margin-bottom:1rem;padding:1rem;background:var(--bg-secondary);border-radius:var(--radius-md)}.remove-exercise-btn{background:#ef44441a;color:#ef4444;border:none;width:32px;height:32px;border-radius:var(--radius-sm);cursor:pointer;font-size:1.125rem;display:flex;align-items:center;justify-content:center;transition:all var(--transition-base);margin-bottom:.5rem}.remove-exercise-btn:hover{background:#ef444433}.form-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:1rem}.workouts-table-card{background:var(--bg-secondary);padding:1.5rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);overflow-x:auto}.workouts-table{width:100%;border-collapse:collapse}.workouts-table thead{background:var(--bg-card)}.workouts-table th{text-align:left;padding:1rem;font-size:.875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.workouts-table td{padding:1rem;border-top:1px solid var(--border-color)}.workouts-table tbody tr{transition:background var(--transition-base)}.workouts-table tbody tr:hover{background:var(--bg-card)}.action-buttons{display:flex;gap:.5rem}.action-btn{background:none;border:none;cursor:pointer;font-size:1.125rem;padding:.25rem .5rem;border-radius:var(--radius-sm);transition:all var(--transition-base)}.edit-btn:hover{background:#4a90e21a}.delete-btn:hover{background:#ef44441a}@media(max-width:768px){.page-header{flex-direction:column;align-items:flex-start;gap:1rem}.page-header button{width:100%}.form-row,.exercise-row{grid-template-columns:1fr}.workouts-table{font-size:.875rem}.workouts-table th,.workouts-table td{padding:.75rem .5rem}}.progress-page{max-width:1400px;margin:0 auto}.progress-form-card{background:var(--bg-secondary);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:2rem}.progress-form-card h2{font-size:1.5rem;margin-bottom:1.5rem}.progress-form-card h3{font-size:1.125rem;margin:1.5rem 0 1rem;color:var(--text-secondary)}.progress-form{display:flex;flex-direction:column;gap:1.5rem}.progress-chart-card{background:var(--bg-secondary);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:2rem}.chart-controls{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;flex-wrap:wrap;gap:1rem}.metric-selector,.chart-type-selector{display:flex;gap:.5rem;background:var(--bg-card);padding:.25rem;border-radius:var(--radius-md)}.metric-btn,.type-btn{padding:.5rem 1rem;background:transparent;border:none;color:var(--text-secondary);font-size:.875rem;font-weight:500;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-base)}.metric-btn:hover,.type-btn:hover{color:var(--text-primary)}.metric-btn.active,.type-btn.active{background:var(--accent-teal);color:#fff}.chart-wrapper{min-height:400px}.progress-table-card{background:var(--bg-secondary);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);overflow-x:auto}.progress-table-card h2{font-size:1.25rem;margin-bottom:1.5rem}.progress-table{width:100%;border-collapse:collapse}.progress-table thead{background:var(--bg-card)}.progress-table th{text-align:left;padding:1rem;font-size:.875rem;font-weight:600;color:var(--text-secondary)}.progress-table td{padding:1rem;border-top:1px solid var(--border-color)}.progress-table tbody tr{transition:background var(--transition-base)}.progress-table tbody tr:hover{background:var(--bg-card)}@media(max-width:768px){.chart-controls{flex-direction:column;align-items:stretch}.metric-selector,.chart-type-selector{width:100%;justify-content:space-between}.metric-btn,.type-btn{flex:1}}.profile-page{max-width:1200px;margin:0 auto}.profile-page>h1{font-size:2rem;margin-bottom:2rem}.profile-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:2rem;margin-bottom:2rem}.profile-card{background:var(--bg-secondary);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.profile-header{display:flex;align-items:center;gap:1.5rem;margin-bottom:2rem;padding-bottom:2rem;border-bottom:1px solid var(--border-color)}.profile-avatar-large{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,var(--accent-blue),var(--accent-purple));display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:700;color:#fff}.profile-header h2{font-size:1.5rem;margin:0 0 .25rem}.profile-stats{display:flex;flex-direction:column;gap:1.5rem}.profile-stat{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--bg-card);border-radius:var(--radius-md)}.stat-icon{font-size:2rem}.stat-label{font-size:.875rem;color:var(--text-muted);margin:0 0 .25rem}.stat-value{font-size:1.125rem;font-weight:600;margin:0}.profile-form-card{background:var(--bg-secondary);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.profile-form{display:flex;flex-direction:column;gap:1.5rem}.profile-form input:disabled,.profile-form select:disabled{background:var(--bg-card);cursor:not-allowed;opacity:.7}.danger-zone{background:var(--bg-secondary);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid rgba(239,68,68,.2)}.danger-zone h2{font-size:1.25rem;margin-bottom:1.5rem;color:#ef4444}.danger-actions{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;background:var(--bg-card);border-radius:var(--radius-md);margin-bottom:1rem}.danger-actions:last-child{margin-bottom:0}.danger-actions h3{font-size:1rem;margin:0 0 .25rem}.danger-actions p{font-size:.875rem;color:var(--text-muted);margin:0}.btn-danger{background:#ef44441a;color:#ef4444;border:1px solid rgba(239,68,68,.3);padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:500;cursor:pointer;transition:all var(--transition-base)}.btn-danger:hover{background:#ef444433;border-color:#ef444480}@media(max-width:768px){.profile-grid{grid-template-columns:1fr}.profile-header{flex-direction:column;text-align:center}.danger-actions{flex-direction:column;gap:1rem;align-items:stretch}.danger-actions button{width:100%}}:root{--bg-primary: #1a1f2e;--bg-secondary: #2d3548;--bg-card: #3a4359;--bg-input: #2a3142;--text-primary: #ffffff;--text-secondary: #b8c1d9;--text-muted: #8892a6;--accent-blue: #4a90e2;--accent-teal: #3ecf8e;--accent-green: #2dd4bf;--accent-purple: #8b5cf6;--border-color: #4a5568;--hover-bg: #4a5568;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--transition-fast: .15s ease-in-out;--transition-base: .2s ease-in-out;--transition-slow: .3s ease-in-out}*{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:var(--bg-primary);color:var(--text-primary);line-height:1.6}#root{min-height:100vh}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-card);border-radius:var(--radius-md)}::-webkit-scrollbar-thumb:hover{background:var(--hover-bg)}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}h5{font-size:1.125rem}h6{font-size:1rem}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:all var(--transition-base)}.btn{padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:500;font-size:1rem;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;transition:all var(--transition-base)}.btn-primary{background:var(--accent-blue);color:#fff}.btn-primary:hover{background:#3a7bc8;transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-success{background:var(--accent-teal);color:#fff}.btn-success:hover{background:#2eb87a;transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--bg-card);color:var(--text-primary)}.btn-secondary:hover{background:var(--hover-bg)}input,select,textarea{font-family:inherit;width:100%;padding:.75rem 1rem;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:1rem;transition:all var(--transition-base)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent-blue);box-shadow:0 0 0 3px #4a90e21a}input::placeholder{color:var(--text-muted)}.card{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-md);transition:all var(--transition-base)}.card:hover{box-shadow:var(--shadow-lg)}a{color:var(--accent-blue);text-decoration:none;transition:color var(--transition-base)}a:hover{color:#3a7bc8}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-lg)}.flex{display:flex}.flex-col{display:flex;flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-secondary{color:var(--text-secondary)}.mt-sm{margin-top:var(--spacing-sm)}.mt-md{margin-top:var(--spacing-md)}.mt-lg{margin-top:var(--spacing-lg)}.mt-xl{margin-top:var(--spacing-xl)}.mb-sm{margin-bottom:var(--spacing-sm)}.mb-md{margin-bottom:var(--spacing-md)}.mb-lg{margin-bottom:var(--spacing-lg)}.mb-xl{margin-bottom:var(--spacing-xl)}.w-full{width:100%}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn var(--transition-base)}