:root{--background: #0f0f23;--surface: #1a1a2e;--primary-color: #6366f1;--primary-hover: #5b5bd6;--text-primary: #ffffff;--text-secondary: #a1a1aa;--border: #374151;--radius: 8px;--radius-lg: 12px;--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--transition: all .2s ease-in-out}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--background);color:var(--text-primary);line-height:1.6}.app{min-height:100vh;background:var(--background)}.container{max-width:600px;margin:0 auto;padding:2rem 1rem}.app-header{text-align:center;margin-bottom:3rem;background:linear-gradient(135deg,var(--primary-color),#8b5cf6);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.app-header h1{font-size:2.5rem;font-weight:700;margin-bottom:.5rem;color:#fff}.subtitle{font-size:1.1rem;opacity:.9;color:#fff}.add-task-section{display:flex;gap:1rem;margin-bottom:2rem}.input-wrapper{position:relative;flex:1}.input-wrapper input{width:100%;padding:1rem;font-size:1rem;background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);color:var(--text-primary);transition:var(--transition)}.input-wrapper input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f11a}.input-wrapper.large input{padding:1.25rem;font-size:1.1rem}.char-counter{position:absolute;bottom:-1.5rem;right:0;font-size:.75rem;color:var(--text-secondary)}.char-counter.warning{color:#f59e0b}.add-button{background:var(--primary-color);color:#fff;border:none;padding:1rem 1.5rem;border-radius:var(--radius);font-weight:500;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:.5rem;white-space:nowrap}.add-button:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px)}.add-button:disabled{opacity:.5;cursor:not-allowed}.filter-section{margin-bottom:2rem}.filter-buttons{display:flex;gap:.5rem;background:var(--surface);padding:.5rem;border-radius:var(--radius)}.filter-buttons button{flex:1;padding:.75rem;background:transparent;color:var(--text-secondary);border:none;border-radius:var(--radius);cursor:pointer;transition:var(--transition);font-size:.9rem}.filter-buttons button.active{background:var(--primary-color);color:#fff}.filter-buttons button:hover:not(.active){background:#ffffff0d;color:var(--text-primary)}.tasks-section{background:var(--surface);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-lg)}.loading{text-align:center;padding:2rem;color:var(--text-secondary)}.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-secondary)}.task-list{list-style:none}.task-item{border-bottom:1px solid var(--border);padding:1rem 0}.task-item:last-child{border-bottom:none}.task-view{display:flex;align-items:center;gap:1rem}.task-checkbox{display:flex;align-items:center;gap:.75rem;flex:1;cursor:pointer}.task-checkbox input{display:none}.checkmark{width:20px;height:20px;border:2px solid var(--border);border-radius:4px;display:flex;align-items:center;justify-content:center;transition:var(--transition);flex-shrink:0}.task-checkbox input:checked+.checkmark{background:var(--primary-color);border-color:var(--primary-color);color:#fff}.task-title{flex:1;word-break:break-word}.task-item.completed .task-title{text-decoration:line-through;opacity:.6}.task-actions{display:flex;gap:.5rem}.edit-button,.delete-button,.save-button,.cancel-button{background:transparent;border:1px solid var(--border);color:var(--text-secondary);padding:.5rem;border-radius:var(--radius);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center}.edit-button:hover{border-color:var(--primary-color);color:var(--primary-color)}.delete-button:hover{border-color:#ef4444;color:#ef4444}.save-button:hover{border-color:#10b981;color:#10b981}.cancel-button:hover{border-color:#f59e0b;color:#f59e0b}.edit-mode{display:flex;gap:1rem;align-items:center}.edit-mode .input-wrapper{flex:1}.edit-actions{display:flex;gap:.5rem}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;background:var(--background)}.loading-spinner{width:40px;height:40px;border:4px solid var(--border);border-top:4px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.auth-container{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--background);padding:2rem}.auth-card{background:var(--surface);padding:3rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);text-align:center;max-width:400px;width:100%}.auth-card h1{margin-bottom:1rem;color:var(--text-primary)}.auth-card p{margin-bottom:2rem;color:var(--text-secondary)}.auth-button{background:var(--primary-color);color:#fff;border:none;padding:.75rem 2rem;border-radius:var(--radius);font-size:1rem;font-weight:500;cursor:pointer;transition:var(--transition);width:100%}.auth-button:hover{background:var(--primary-hover);transform:translateY(-1px)}.user-info{display:flex;align-items:center;gap:1rem;margin-top:1rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.2);font-size:.9rem}.logout-button{background:#fff3;color:#fff;border:1px solid rgba(255,255,255,.3);padding:.5rem 1rem;border-radius:var(--radius);font-size:.875rem;cursor:pointer;transition:var(--transition)}.logout-button:hover{background:#ffffff4d;border-color:#ffffff80}.profile-modal{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.profile-content{background:var(--surface);border-radius:var(--radius-lg);width:100%;max-width:500px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.profile-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid var(--border)}.profile-header h2{margin:0;color:var(--text-primary)}.close-button{background:transparent;border:none;font-size:1.5rem;color:var(--text-secondary);cursor:pointer;padding:.25rem;border-radius:var(--radius);transition:var(--transition)}.close-button:hover{background:#ffffff1a;color:var(--text-primary)}.profile-body{padding:1.5rem}.welcome-message{background:linear-gradient(135deg,var(--primary-color),#8b5cf6);color:#fff;padding:1rem;border-radius:var(--radius);text-align:center;margin-bottom:1.5rem}.welcome-message p{margin:0;font-weight:500}.profile-avatar-section{text-align:center;margin-bottom:2rem}.profile-avatar{position:relative;width:80px;height:80px;margin:0 auto;border-radius:50%;overflow:hidden;border:3px solid var(--border)}.profile-avatar img{width:100%;height:100%;object-fit:cover}.avatar-fallback{width:100%;height:100%;background:var(--border);display:flex;align-items:center;justify-content:center;color:var(--text-secondary)}.form-group{margin-bottom:1.5rem}.form-group:last-child{margin-bottom:0}.form-group label{display:block;margin-bottom:.5rem;color:var(--text-primary);font-weight:500}.form-group input,.form-group textarea{width:100%;padding:.75rem;background:var(--background);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:.9rem;transition:var(--transition)}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f11a}.form-group textarea{resize:vertical;min-height:80px}.char-count{display:block;text-align:right;font-size:.75rem;color:var(--text-secondary);margin-top:.25rem}.profile-actions{display:flex;gap:1rem;margin-top:2rem}.save-button,.cancel-button,.edit-profile-button{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:var(--radius);font-weight:500;cursor:pointer;transition:var(--transition);border:none}.save-button{background:var(--primary-color);color:#fff;flex:1}.save-button:hover:not(:disabled){background:var(--primary-hover)}.save-button:disabled{opacity:.5;cursor:not-allowed}.cancel-button{background:transparent;color:var(--text-secondary);border:1px solid var(--border);flex:1}.cancel-button:hover:not(:disabled){background:#ffffff0d;color:var(--text-primary)}.edit-profile-button{background:var(--primary-color);color:#fff;width:100%;justify-content:center}.edit-profile-button:hover{background:var(--primary-hover)}.profile-display{text-align:center}.profile-info h3{margin:0 0 .5rem;color:var(--text-primary);font-size:1.5rem}.profile-email{color:var(--text-secondary);margin-bottom:1rem}.profile-bio{text-align:left;margin:1.5rem 0;padding:1rem;background:var(--background);border-radius:var(--radius)}.profile-bio h4{margin:0 0 .5rem;color:var(--text-primary);font-size:.9rem;text-transform:uppercase;letter-spacing:.5px}.profile-bio p{margin:0;color:var(--text-secondary);line-height:1.5}.profile-joined{color:var(--text-secondary);font-size:.8rem;margin:1rem 0 2rem}.user-info-expanded{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-top:1rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.2);font-size:.9rem}.user-avatar-info{display:flex;align-items:center;gap:.75rem}.header-avatar{position:relative;width:32px;height:32px;border-radius:50%;overflow:hidden;border:2px solid rgba(255,255,255,.3);flex-shrink:0}.header-avatar img{width:100%;height:100%;object-fit:cover}.header-avatar-fallback{position:absolute;top:0;left:0;width:100%;height:100%;background:#ffffff1a;display:none;align-items:center;justify-content:center;color:#ffffffb3}.profile-button{background:#ffffff1a;color:#fff;border:1px solid rgba(255,255,255,.2);padding:.5rem 1rem;border-radius:var(--radius);font-size:.875rem;cursor:pointer;transition:var(--transition)}.profile-button:hover{background:#fff3;border-color:#fff6}@media (max-width: 640px){.container{padding:1rem}.app-header{padding:1.5rem}.app-header h1{font-size:2rem}.add-task-section,.filter-buttons{flex-direction:column}.task-view{gap:.5rem}.task-actions{flex-direction:column;gap:.25rem}.auth-container{padding:1rem}.auth-card{padding:2rem 1.5rem}.user-info-expanded{flex-direction:column;gap:1rem;text-align:center}.user-avatar-info{justify-content:center}.logout-button,.profile-button{width:100%}.edit-mode{flex-direction:column;gap:.5rem}.edit-actions{align-self:stretch}}