.app-container{max-width:1200px;margin:0 auto}.app-header{background:#fff;padding:20px 30px;border-radius:12px;box-shadow:0 4px 6px #0000001a;margin-bottom:30px}.header-controls{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px;margin-top:15px}.app-header h1{color:#667eea;font-size:2rem;font-weight:700}.view-toggle{display:flex;align-items:center;gap:10px}.toggle-label{font-weight:500;color:#333;white-space:nowrap}.toggle-switch{display:flex;background:#f0f0f0;border-radius:8px;padding:4px;gap:4px}.toggle-option{padding:8px 16px;border:none;border-radius:6px;background:transparent;color:#666;font-size:14px;font-weight:500;cursor:pointer;transition:all .3s;white-space:nowrap}.toggle-option:hover{background:#667eea1a;color:#667eea}.toggle-option.active{background:#667eea;color:#fff;box-shadow:0 2px 4px #667eea4d}.date-selector{display:flex;align-items:center;gap:10px}.date-selector label{font-weight:500;color:#333}.date-selector input{padding:8px 12px;border:2px solid #e0e0e0;border-radius:6px;font-size:14px;transition:border-color .3s}.date-selector input:focus{outline:none;border-color:#667eea}.refresh-btn{padding:10px 20px;background:#667eea;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:background .3s}.refresh-btn:hover:not(:disabled){background:#5568d3}.refresh-btn:disabled{opacity:.6;cursor:not-allowed}.error-message{background:#fee;color:#c33;padding:15px 20px;border-radius:8px;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center;border-left:4px solid #c33}.error-message button{background:none;border:none;color:#c33;font-size:20px;cursor:pointer;padding:0 10px}.saving-indicator{background:#e3f2fd;color:#1976d2;padding:10px 20px;border-radius:8px;margin-bottom:20px;text-align:center;font-weight:500}.loading{text-align:center;padding:50px;color:#fff;font-size:1.5rem}.habits-container{display:flex;flex-direction:column;gap:30px}.category-section{background:#fff;padding:25px;border-radius:12px;box-shadow:0 4px 6px #0000001a}.category-title{color:#333;font-size:1.5rem;margin-bottom:20px;padding-bottom:10px;border-bottom:2px solid #f0f0f0}.category-title.collapsible-header{cursor:pointer;-webkit-user-select:none;user-select:none;display:flex;align-items:center;gap:10px;transition:all .2s ease;padding:10px;margin:-10px -10px 10px;border-radius:8px}.category-title.collapsible-header:hover{background:#f8f9fa;color:#667eea}.group-name{flex:1}.group-count{color:#999;font-size:1rem;font-weight:400}.collapse-icon{font-size:.9rem;color:#667eea;transition:transform .3s ease;display:inline-block}.collapse-icon.collapsed{transform:rotate(0)}.collapse-icon.expanded{transform:rotate(90deg)}.habits-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;overflow:hidden;transition:max-height .3s ease,opacity .3s ease}.habits-grid.collapsed{max-height:0;opacity:0;margin:0;padding:0}.habits-grid.expanded{max-height:5000px;opacity:1}.no-habits{text-align:center;padding:50px;color:#fff;font-size:1.2rem;background:#fff;border-radius:12px;color:#666}@media (max-width: 768px){.app-header{padding:15px 20px}.header-controls{flex-direction:column;align-items:flex-start;gap:15px}.view-toggle{width:100%;justify-content:space-between}.toggle-switch{flex:1;justify-content:space-around}.habits-grid{grid-template-columns:1fr}}.habit-card{background:#f8f9fa;border:2px solid #e0e0e0;border-radius:10px;padding:20px;transition:all .3s ease;display:flex;flex-direction:column;gap:15px}.habit-card:hover{transform:translateY(-2px);box-shadow:0 6px 12px #00000026}.habit-card.completed{border-color:#4caf50;background:#f1f8f4}.habit-header{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.habit-name{color:#333;font-size:1.2rem;font-weight:600;margin:0;flex:1}.habit-frequency{background:#667eea;color:#fff;padding:4px 12px;border-radius:12px;font-size:.75rem;font-weight:500;white-space:nowrap}.habit-stats{display:flex;flex-direction:column;gap:8px}.stat-item{display:flex;justify-content:space-between;align-items:center}.stat-label{color:#666;font-size:.9rem}.stat-value{font-weight:600;font-size:.95rem;color:#333}.progress-bar-container{width:100%;height:8px;background:#e0e0e0;border-radius:4px;overflow:hidden}.progress-bar{height:100%;transition:width .3s ease;border-radius:4px}.toggle-btn{padding:12px 20px;border:2px solid #667eea;background:#fff;color:#667eea;border-radius:6px;cursor:pointer;font-size:1rem;font-weight:500;transition:all .3s ease}.toggle-btn:hover:not(:disabled){background:#667eea;color:#fff}.toggle-btn.completed-btn{background:#4caf50;border-color:#4caf50;color:#fff}.toggle-btn.completed-btn:hover:not(:disabled){background:#45a049;border-color:#45a049}.toggle-btn:disabled{opacity:.6;cursor:not-allowed}.habit-meta{font-size:.85rem;color:#999;text-align:center;padding-top:10px;border-top:1px solid #e0e0e0}.start-date{font-style:italic}*{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:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}