.workout-timer-app{--primary: #4f46e5;--primary-hover: #4338ca;--primary-light: #e0e7ff;--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--bg: #ffffff;--bg-light: #f9fafb;--bg-secondary: #f3f4f6;--text: #111827;--text-secondary: #6b7280;--text-tertiary: #9ca3af;--border: #e5e7eb;--shadow: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07);--shadow-lg: 0 10px 20px rgba(0, 0, 0, .1);--radius: 12px;--radius-sm: 8px;--transition: all .2s ease}.workout-timer-app *{margin:0;padding:0;box-sizing:border-box}.workout-timer-app{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,sans-serif;background-color:var(--bg-light);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}.workout-timer-app .container{max-width:720px;margin:0 auto;padding:0 20px}.workout-timer-app .timer-home-link{padding:12px 20px;background-color:var(--bg);border-bottom:1px solid var(--border)}.workout-timer-app .timer-home-link a{color:var(--primary);text-decoration:none;font-size:14px;font-weight:500}.workout-timer-app .timer-home-link a:hover{text-decoration:underline}.workout-timer-app .view{display:none;min-height:100vh;padding:24px 0}.workout-timer-app .view.active{display:block}.workout-timer-app #timerView{display:none;min-height:100vh;background:linear-gradient(135deg,var(--bg) 0%,var(--bg-light) 100%)}.workout-timer-app #timerView.active{display:flex;align-items:center;justify-content:center;padding:0}.workout-timer-app .view-tabs.hidden{display:none}.workout-timer-app .page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:16px}.workout-timer-app .page-header h1{font-size:32px;font-weight:700;letter-spacing:-.5px;color:var(--text)}.workout-timer-app .view-tabs{display:flex;align-items:center;gap:0;border-bottom:1px solid var(--border);padding:0 20px;background:var(--bg);position:sticky;top:0;z-index:10}.workout-timer-app.dark-mode .view-tabs{background:#000;border-bottom:none}.workout-timer-app .brand-logo{font-size:18px;font-weight:700;color:var(--primary);text-decoration:none;margin-right:16px;padding:12px 0;letter-spacing:-.5px}.workout-timer-app .brand-logo:hover{color:var(--primary-hover)}.workout-timer-app .nav-tabs{display:flex;gap:0;flex:1}.workout-timer-app .nav-tabs-left{flex:1}.workout-timer-app .tab-btn{padding:12px 16px;background:none;border:none;border-bottom:3px solid transparent;color:var(--text-secondary);font-size:15px;font-weight:500;cursor:pointer;transition:var(--transition)}.workout-timer-app .tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.workout-timer-app .tab-btn:hover{color:var(--text)}.workout-timer-app .btn{padding:12px 24px;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:var(--transition);white-space:nowrap;display:inline-flex;align-items:center;gap:8px}.workout-timer-app .btn-primary{background-color:var(--primary);color:#fff;box-shadow:var(--shadow)}.workout-timer-app .btn-primary:hover{background-color:var(--primary-hover);box-shadow:var(--shadow-md);transform:translateY(-2px)}.workout-timer-app .btn-primary:active{transform:translateY(0)}.workout-timer-app .btn-secondary{background-color:var(--bg-secondary);color:var(--text);border:1px solid var(--border)}.workout-timer-app .btn-secondary:hover{background-color:var(--border);border-color:var(--text-tertiary)}.workout-timer-app .btn-danger{background-color:var(--danger);color:#fff;box-shadow:var(--shadow)}.workout-timer-app .btn-danger:hover{background-color:#dc2626;box-shadow:var(--shadow-md)}.workout-timer-app .btn-large{padding:16px 40px;font-size:16px;border-radius:var(--radius)}.workout-timer-app .btn-small{padding:8px 12px;font-size:13px;background-color:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition)}.workout-timer-app .btn-small:hover{background-color:var(--border)}.workout-timer-app .btn-icon{background:none;border:none;font-size:18px;cursor:pointer;padding:8px;border-radius:var(--radius-sm);transition:var(--transition);color:var(--text-secondary)}.workout-timer-app .btn-icon:hover{color:var(--text);background-color:var(--bg-secondary)}.workout-timer-app .workouts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px;margin-bottom:40px}.workout-timer-app .workout-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:var(--transition);cursor:pointer}.workout-timer-app .workout-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.workout-timer-app .workout-card-header{margin-bottom:20px}.workout-timer-app .workout-card-name{font-size:22px;font-weight:700;margin-bottom:12px;word-break:break-word;color:var(--text)}.workout-timer-app .workout-card-info{font-size:14px;color:var(--text-secondary);display:flex;gap:20px;flex-wrap:wrap}.workout-timer-app .workout-card-actions{display:flex;gap:10px;margin-top:20px}.workout-timer-app .workout-card-actions button{flex:1;padding:10px 16px;font-size:13px}.workout-timer-app .workout-card-start{grid-column:span 2}.workout-timer-app .empty-state{text-align:center;padding:80px 20px}.workout-timer-app .empty-state.hidden{display:none}.workout-timer-app .empty-icon{font-size:64px;margin-bottom:24px}.workout-timer-app .empty-state h2{font-size:28px;font-weight:700;margin-bottom:12px;color:var(--text)}.workout-timer-app .empty-state p{color:var(--text-secondary);margin-bottom:32px;font-size:16px}.workout-timer-app .workout-name-input{flex:1;font-size:32px;font-weight:700;border:none;background:transparent;color:var(--text);padding:0}.workout-timer-app .workout-name-input::placeholder{color:var(--text-tertiary)}.workout-timer-app .workout-name-input:focus{outline:none;box-shadow:0 0 0 3px var(--primary-light)}.workout-timer-app .editor-content{display:grid;grid-template-columns:1fr 240px;gap:40px;margin-bottom:40px}@media (max-width: 768px){.workout-timer-app .editor-content{grid-template-columns:1fr}}.workout-timer-app .intervals-section h2,.workout-timer-app .rounds-section label{font-size:18px;font-weight:700;margin-bottom:20px;color:var(--text)}.workout-timer-app .intervals-list{display:flex;flex-direction:column;gap:16px;margin-bottom:24px}.workout-timer-app .interval-row{display:flex;gap:12px;align-items:flex-start;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;transition:var(--transition)}.workout-timer-app [draggable=true]{-webkit-user-select:none;user-select:none}.workout-timer-app [draggable=true]:active{cursor:grabbing}.workout-timer-app .interval-row:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}.workout-timer-app .interval-color{width:40px;height:40px;border-radius:50%;cursor:pointer;border:2px solid var(--border);transition:var(--transition);flex-shrink:0;margin-top:2px}.workout-timer-app .interval-color:hover{border-color:var(--text);box-shadow:var(--shadow-md)}.workout-timer-app .interval-name{flex:1;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-weight:500;transition:var(--transition)}.workout-timer-app .interval-name:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.workout-timer-app .interval-duration{width:80px;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;text-align:center;font-family:Courier New,monospace;font-weight:500;transition:var(--transition)}.workout-timer-app .interval-duration:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.workout-timer-app .interval-duration.invalid{border-color:var(--danger);background-color:#ef44440d}.workout-timer-app .interval-duration.invalid:focus{border-color:var(--danger);box-shadow:0 0 0 3px #ef44441a}.workout-timer-app .interval-error{font-size:12px;color:var(--danger);margin-top:4px;min-height:16px}.workout-timer-app .interval-actions{display:flex;gap:4px;flex-shrink:0}.workout-timer-app .interval-btn{padding:8px;background:none;border:none;cursor:pointer;font-size:16px;transition:var(--transition);border-radius:var(--radius-sm);color:var(--text-secondary)}.workout-timer-app .interval-btn:hover{background-color:var(--bg-secondary);color:var(--text)}.workout-timer-app .rounds-control{display:flex;gap:12px;align-items:center}.workout-timer-app .rounds-control input{width:70px;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:16px;text-align:center;font-weight:600;transition:var(--transition)}.workout-timer-app .rounds-control input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.workout-timer-app .total-duration{font-size:14px;color:var(--text-secondary);padding-top:16px;margin-top:16px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:8px}.workout-timer-app .total-duration strong{color:var(--primary);font-size:20px;font-weight:700}.workout-timer-app .editor-footer{display:flex;gap:12px;justify-content:flex-end;padding-top:24px;border-top:1px solid var(--border)}.workout-timer-app .editor-footer button{min-width:100px}.workout-timer-app .save-button-wrapper{display:flex;align-items:center;gap:12px}.workout-timer-app .save-message{color:var(--success);font-size:14px;font-weight:600;animation:fadeInOut 2s ease}@keyframes fadeInOut{0%{opacity:0}15%{opacity:1}85%{opacity:1}to{opacity:0}}.workout-timer-app .sync-enabled{background:#a855f71a;border:1px solid rgba(168,85,247,.3);padding:16px;border-radius:var(--radius-sm);margin-bottom:16px}.workout-timer-app .sync-status-badge{display:inline-block;background:#10b981;color:#fff;padding:4px 12px;border-radius:12px;font-size:12px;font-weight:600;margin-bottom:12px}.workout-timer-app .sync-spinner{display:inline-block;color:#8b5cf6;font-size:14px;margin-bottom:8px;animation:spin 1s linear infinite}@keyframes spin{0%{opacity:.6}50%{opacity:1}to{opacity:.6}}.workout-timer-app .sync-error{background:#f8717126;color:#ef4444;padding:8px 12px;border-radius:4px;font-size:14px;margin-bottom:8px;border-left:3px solid #ef4444}.workout-timer-app .sync-time{color:var(--text-secondary);font-size:13px;margin-bottom:12px}.workout-timer-app .sync-backend-url{color:var(--text-secondary);font-size:13px;margin-bottom:8px}.workout-timer-app .sync-backend-url code{font-size:12px}.workout-timer-app .sync-setup{background:var(--bg-secondary);padding:16px;border-radius:var(--radius-sm);border:1px solid var(--border)}.workout-timer-app .sync-note{background:#a855f71a;border-left:3px solid #8b5cf6;padding:12px;border-radius:4px;margin-bottom:16px;font-size:14px;color:var(--text)}.workout-timer-app .sync-form{display:flex;flex-direction:column;gap:16px;margin-bottom:16px}.workout-timer-app .form-group{display:flex;flex-direction:column;gap:6px}.workout-timer-app .form-group label{font-weight:600;font-size:14px;color:var(--text)}.workout-timer-app .form-input{padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-light);color:var(--text);font-size:14px;font-family:inherit;transition:var(--transition)}.workout-timer-app .form-input:focus{outline:none;border-color:#8b5cf6;box-shadow:0 0 0 3px #8b5cf61a}.workout-timer-app .form-group small{font-size:12px;color:var(--text-secondary);line-height:1.4}.workout-timer-app .form-group small a{color:#8b5cf6;text-decoration:none}.workout-timer-app .form-group small a:hover{text-decoration:underline}.workout-timer-app .sync-message{margin-top:12px;padding:12px 16px;border-radius:var(--radius-sm);font-size:14px}.workout-timer-app .sync-message.success{background:#4ade8026;color:#22c55e;border:1px solid rgba(74,222,128,.3);border-left:3px solid #22c55e}.workout-timer-app .sync-message.error{background:#f8717126;color:#ef4444;border:1px solid rgba(248,113,113,.3);border-left:3px solid #ef4444}.workout-timer-app .about-section h3{font-size:16px;font-weight:600;margin-top:20px;margin-bottom:12px;color:var(--text)}.workout-timer-app .about-section h3:first-child{margin-top:0}.workout-timer-app code{background:var(--bg-secondary);padding:2px 6px;border-radius:4px;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:13px;color:#8b5cf6}.workout-timer-app .code-block{display:block;background:var(--bg-secondary);border:1px solid var(--border);padding:12px;border-radius:var(--radius-sm);margin:8px 0;overflow-x:auto;font-size:12px;line-height:1.5;color:#8b5cf6;white-space:pre-wrap;word-break:break-word;font-family:Monaco,Menlo,Ubuntu Mono,monospace}.workout-timer-app .btn-danger.hidden{display:none}.workout-timer-app .timer-container{width:100%;max-width:600px;padding:20px;text-align:center}.workout-timer-app .timer-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:60px;gap:20px}.workout-timer-app .timer-info{flex:1}.workout-timer-app .timer-workout-name{font-size:16px;color:var(--text-secondary);font-weight:600}.workout-timer-app .timer-progress{font-size:13px;color:var(--text-tertiary);margin-top:6px}.workout-timer-app .timer-display{margin-bottom:60px}.workout-timer-app .timer-interval-name{font-size:28px;color:var(--text-secondary);margin-bottom:24px;font-weight:600}.workout-timer-app .timer-countdown{font-family:Courier New,Monaco,monospace;font-size:140px;font-weight:700;color:var(--primary);line-height:1;margin-bottom:28px;letter-spacing:-4px}.workout-timer-app .timer-next-interval{font-size:15px;color:var(--text-tertiary);font-weight:500}.workout-timer-app .timer-progress-bar{width:100%;height:6px;background-color:var(--bg-secondary);border-radius:3px;margin-bottom:60px;overflow:hidden}.workout-timer-app .progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-hover));width:0%;transition:width .3s ease}.workout-timer-app .timer-controls{margin-bottom:40px}.workout-timer-app .timer-controls button{min-width:200px;padding:16px 40px;font-size:16px}.workout-timer-app .timer-settings{text-align:left;background:var(--bg-secondary);padding:20px;border-radius:var(--radius-sm)}.workout-timer-app .checkbox-label{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:14px;color:var(--text-secondary);font-weight:500}.workout-timer-app .checkbox-label input{cursor:pointer;accent-color:var(--primary);width:18px;height:18px}.workout-timer-app .histories-list{display:flex;flex-direction:column;gap:16px}.workout-timer-app .history-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}.workout-timer-app .history-item:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}.workout-timer-app .history-item-info h3{font-size:16px;font-weight:600;margin-bottom:6px}.workout-timer-app .history-item-date{font-size:13px;color:var(--text-tertiary)}.workout-timer-app .history-item-duration{font-size:15px;font-weight:700;color:var(--primary)}.workout-timer-app .filter-buttons{display:flex;gap:10px;margin-bottom:24px}.workout-timer-app .filter-btn{padding:10px 18px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;font-weight:500;cursor:pointer;transition:var(--transition)}.workout-timer-app .filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.workout-timer-app .filter-btn:hover{border-color:var(--primary);color:var(--primary)}.workout-timer-app .filter-btn.active:hover{background:var(--primary-hover)}@media (max-width: 768px){.workout-timer-app .container{padding:0 16px}.workout-timer-app .view{padding:16px 0}.workout-timer-app .interval-row{flex-wrap:wrap;gap:8px}.workout-timer-app .interval-name{flex:1 1 100%;order:1}.workout-timer-app .interval-color{order:0;width:32px;height:32px}.workout-timer-app .interval-duration{order:2;width:70px}.workout-timer-app .interval-actions{order:3}.workout-timer-app .editor-footer{flex-wrap:wrap}.workout-timer-app .editor-footer button{min-width:100px;flex:1}.workout-timer-app .total-duration strong{font-size:20px}}@media (max-width: 640px){.workout-timer-app .page-header{flex-direction:column;align-items:flex-start;margin-bottom:16px;gap:12px}.workout-timer-app .page-header h1{font-size:24px}.workout-timer-app .page-header>div{width:100%;display:flex;gap:8px}.workout-timer-app .page-header button{flex:1}.workout-timer-app .workouts-grid{grid-template-columns:1fr}.workout-timer-app .timer-header,.workout-timer-app .timer-display{margin-bottom:30px}.workout-timer-app .timer-countdown{font-size:72px;letter-spacing:-2px;margin-bottom:16px}.workout-timer-app .timer-interval-name{font-size:20px;margin-bottom:16px}.workout-timer-app .timer-progress-bar{margin-bottom:30px}.workout-timer-app .timer-controls button{min-width:150px;padding:14px 30px}.workout-timer-app .timer-container{padding:16px}.workout-timer-app .filter-buttons{flex-wrap:wrap}.workout-timer-app .workout-name-input{font-size:20px}.workout-timer-app .interval-btn{padding:6px;font-size:14px}.workout-timer-app .workout-card-actions{flex-wrap:wrap}.workout-timer-app .workout-card-actions button{flex:1;min-width:60px}.workout-timer-app .brand-logo{font-size:16px;margin-right:12px;padding:10px 0}.workout-timer-app .tab-btn{padding:10px 12px;font-size:14px}}.workout-timer-app .about-content{max-width:700px}.workout-timer-app .about-section{margin-bottom:24px}.workout-timer-app .about-section h2{font-size:20px;font-weight:700;color:var(--text);margin-bottom:12px}.workout-timer-app .about-section p{font-size:16px;color:var(--text-secondary);line-height:1.7;margin-bottom:16px}.workout-timer-app .use-cases-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}.workout-timer-app .use-case{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;text-align:center}.workout-timer-app .use-case-icon{font-size:32px;margin-bottom:12px}.workout-timer-app .use-case h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:8px}.workout-timer-app .use-case p{font-size:13px;color:var(--text-secondary);margin:0;line-height:1.5}.workout-timer-app .features-list{list-style:none;padding:0;margin:0}.workout-timer-app .features-list li{font-size:15px;color:var(--text-secondary);padding:10px 0 10px 28px;position:relative;border-bottom:1px solid var(--border)}.workout-timer-app .features-list li:last-child{border-bottom:none}.workout-timer-app .features-list li:before{content:"✓";position:absolute;left:0;color:var(--success);font-weight:600}.workout-timer-app .features-list li strong{color:var(--text)}.workout-timer-app .how-to-list{list-style:none;padding:0;margin:0;counter-reset:step-counter}.workout-timer-app .how-to-list li{font-size:15px;color:var(--text-secondary);padding:16px 0 16px 48px;position:relative;border-bottom:1px solid var(--border);counter-increment:step-counter}.workout-timer-app .how-to-list li:last-child{border-bottom:none}.workout-timer-app .how-to-list li:before{content:counter(step-counter);position:absolute;left:0;top:14px;width:28px;height:28px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600}.workout-timer-app .how-to-list li strong{color:var(--text)}.workout-timer-app .templates-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:16px}.workout-timer-app .template-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px}.workout-timer-app .template-card h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:6px}.workout-timer-app .template-card p{font-size:13px;color:var(--text-secondary);margin:0}.workout-timer-app .about-cta{text-align:center;padding:24px 0;border-top:1px solid var(--border);margin-top:24px}.workout-timer-app .data-summary{color:var(--text-secondary);margin-bottom:16px}.workout-timer-app .backup-buttons{display:flex;gap:12px;flex-wrap:wrap}.workout-timer-app .backup-buttons .btn{flex:1;min-width:150px}.workout-timer-app .import-status{margin-top:16px;padding:12px 16px;border-radius:var(--radius-sm);font-size:14px}.workout-timer-app .import-status.success{background:#4ade8026;color:#22c55e;border:1px solid rgba(74,222,128,.3)}.workout-timer-app .import-status.error{background:#f8717126;color:#ef4444;border:1px solid rgba(248,113,113,.3)}.workout-timer-app .settings-content{max-width:700px}.workout-timer-app .settings-section{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px}.workout-timer-app .settings-section h2{font-size:18px;font-weight:700;color:var(--text);margin-bottom:12px}.workout-timer-app .settings-section p{font-size:15px;color:var(--text-secondary);line-height:1.6;margin-bottom:16px}.workout-timer-app .setting-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0}.workout-timer-app .setting-info label{font-size:15px;font-weight:600;color:var(--text);display:block}.workout-timer-app .setting-info small{font-size:13px;color:var(--text-secondary)}.workout-timer-app .toggle-btn{padding:8px 20px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-secondary);font-size:14px;font-weight:500;cursor:pointer;transition:var(--transition);min-width:60px}.workout-timer-app .toggle-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.workout-timer-app .toggle-btn:hover{border-color:var(--primary)}.workout-timer-app .intervals-footer{margin-top:auto;padding:32px 20px;text-align:center;color:var(--text-tertiary);font-size:14px;border-top:1px solid var(--border)}.workout-timer-app .intervals-footer a{color:var(--primary);text-decoration:none}.workout-timer-app .intervals-footer a:hover{text-decoration:underline}.workout-timer-app.dark-mode{--bg: #1a1a1a;--bg-light: #000000;--bg-secondary: #2a2a2a;--text: #e4e4e7;--text-secondary: #a1a1a6;--text-tertiary: #71717a;--border: #2a2a2a}.workout-timer-app.dark-mode .brand-logo{color:#8b5cf6}.workout-timer-app .dark-mode-toggle{border:none;font-size:18px;cursor:pointer;padding:8px 12px;margin-left:auto;margin-right:0;transition:var(--transition);border-radius:var(--radius-sm);background-color:var(--bg-secondary);color:var(--text);display:flex;align-items:center;justify-content:center}.workout-timer-app .dark-mode-toggle:hover{background-color:var(--text-tertiary)}.workout-timer-app.dark-mode .dark-mode-toggle{background-color:var(--bg-secondary)}