:root{--primary-color: #3498db;--primary-hover: #2980b9;--background-color: #f4f7f6;--container-bg: #ffffff;--text-color: #2c3e50;--border-color: #dfe6e9;--shadow-color: rgba(0, 0, 0, .08);--status-pending: #bdc3c7;--status-in-progress: #f39c12;--status-completed: #2ecc71}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;background-color:var(--background-color);color:var(--text-color)}.app-container{max-width:100%;min-height:100%;margin:0 auto;padding:15px;display:flex;flex-direction:column;align-items:center}header,main{width:100%;max-width:960px}header h1{text-align:center;margin-bottom:25px;font-size:2rem;color:var(--text-color)}.add-task-form{display:flex;flex-direction:column;gap:10px;margin-bottom:30px}.add-task-form input{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:5px;font-size:1rem;box-sizing:border-box}.add-task-form button{padding:12px 15px;background-color:var(--primary-color);color:#fff;border:none;border-radius:5px;cursor:pointer;transition:background-color .2s;font-size:1rem}.add-task-form button:hover{background-color:var(--primary-hover)}.todo-list{display:grid;grid-template-columns:1fr;gap:15px}.todo-item{background:var(--container-bg);padding:15px;border-radius:5px;box-shadow:0 2px 5px var(--shadow-color);display:flex;flex-direction:column;align-items:flex-start;gap:15px;border-left:5px solid var(--status-pending)}.todo-item.in-progress{border-left-color:var(--status-in-progress)}.todo-item.completed{border-left-color:var(--status-completed)}.todo-item.completed p{text-decoration:line-through;color:#95a5a6}.todo-item p{margin:0;word-break:break-word}.task-actions{display:flex;width:100%;gap:10px}.task-actions select{flex-grow:1}.task-actions select,.task-actions button{padding:8px 10px;border:1px solid var(--border-color);border-radius:4px;cursor:pointer;background-color:#fff}.task-content{flex-grow:1;display:flex;flex-direction:column;gap:4px}.task-creator{font-size:.75rem;color:#7f8c8d;font-style:italic}.error-message{color:#c0392b;background-color:#fdd;border:1px solid #c0392b;padding:10px;border-radius:5px;text-align:center;margin-bottom:20px}.page-header{width:100%;max-width:960px;display:flex;justify-content:space-between;margin-bottom:25px;padding-bottom:15px;border-bottom:1px solid var(--border-color)}.page-header h1{margin:0}.logout-button{padding:8px 16px;font-size:.9rem;font-weight:600;color:#e74c3c;background-color:transparent;border:1px solid #e74c3c;border-radius:5px;cursor:pointer;transition:all .2s ease-in-out}.logout-button:hover{background-color:#e74c3c;color:#fff;transform:translateY(-1px);box-shadow:0 2px 8px #e74c3c4d}.auth-container{display:flex;justify-content:center;align-items:center;min-height:80vh;padding:20px}.auth-form{background:var(--container-bg);padding:30px 40px;border-radius:8px;box-shadow:0 4px 20px #00000014;width:100%;max-width:420px;box-sizing:border-box;display:flex;flex-direction:column;gap:20px}.auth-form h2{text-align:center;margin:0 0 10px;color:var(--text-color);font-size:2rem;font-weight:600}.auth-form input{width:100%;padding:12px 15px;border:1px solid var(--border-color);border-radius:5px;font-size:1rem;box-sizing:border-box;transition:border-color .2s,box-shadow .2s}.auth-form input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #3498db33}.auth-form button{width:100%;padding:12px 15px;background-color:var(--primary-color);color:#fff;border:none;border-radius:5px;cursor:pointer;transition:background-color .2s;font-size:1rem;font-weight:600;letter-spacing:.5px}.auth-form button:hover{background-color:var(--primary-hover)}.auth-link{text-align:center;margin-top:10px;font-size:.9rem;color:#555}.auth-link a{color:var(--primary-color);text-decoration:none;font-weight:600}.auth-link a:hover{text-decoration:underline}.spinner-container{display:flex;justify-content:center;align-items:center;min-height:80vh}.loading-spinner{width:50px;height:50px;border:6px solid #f3f3f3;border-top:6px solid var(--primary-color);border-radius:50%;animation:spin 1.2s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (min-width: 768px){.app-container{padding:30px}header h1{font-size:2.5rem}.add-task-form{flex-direction:row;align-items:center}.add-task-form input{width:auto;flex-grow:1}.todo-list{grid-template-columns:repeat(2,1fr)}.todo-item{flex-direction:row;align-items:center}.task-actions{width:auto}}@media (min-width: 1024px){header h1{font-size:3rem}.todo-list{grid-template-columns:repeat(3,1fr);gap:20px}}