*{box-sizing:border-box}body{color:#222;background-color:#f4f6f8;margin:0;font-family:Arial,sans-serif}.app-page{justify-content:center;align-items:flex-start;min-height:100vh;padding:40px 16px;display:flex}.todo-card{background-color:#fff;border-radius:14px;width:100%;max-width:560px;padding:28px;box-shadow:0 8px 24px #00000014}.app-title{text-align:center;color:#1f2937;margin:0 0 24px;font-size:28px}.section{margin-bottom:22px}.section-label{color:#4b5563;margin-bottom:8px;font-size:14px;font-weight:600;display:block}.input-row{align-items:center;gap:10px;margin-bottom:12px;display:flex}.text-input{border:1px solid #d1d5db;border-radius:8px;outline:none;flex:1;width:100%;padding:11px 12px;font-size:15px}.text-input:focus{border-color:#2563eb}.full-width{width:100%;margin-top:10px}.primary-button{color:#fff;cursor:pointer;background-color:#2563eb;border:none;border-radius:8px;padding:11px 16px;font-size:15px;font-weight:600}.primary-button:hover{background-color:#1d4ed8}.primary-button:disabled{cursor:not-allowed;background-color:#9ca3af}.list-buttons{flex-wrap:wrap;gap:8px;display:flex}.list-button{color:#374151;cursor:pointer;background-color:#e5e7eb;border:none;border-radius:8px;padding:9px 14px;font-size:14px}.list-button:hover{background-color:#d1d5db}.list-button.active{color:#fff;background-color:#22c55e}.list-title{color:#111827;margin:16px 0 12px;font-size:21px}.task-section{margin-top:10px}.task-section>div{margin-bottom:12px}.task-item{background-color:#f9fafb;border:1px solid #e5e7eb;border-radius:10px;align-items:center;gap:10px;margin-top:8px;padding:12px;display:flex}.task-checkbox{cursor:pointer;width:18px;height:18px}.task-text{color:#1f2937;word-break:break-word;flex:1;font-size:15px}.task-text.completed{color:#6b7280;text-decoration:line-through}.delete-button{color:#991b1b;cursor:pointer;background-color:#fee2e2;border:none;border-radius:8px;padding:7px 9px}.delete-button:hover{background-color:#fecaca}.empty-message{text-align:center;color:#6b7280;background-color:#f9fafb;border-radius:10px;margin:8px 0 0;padding:14px;font-size:15px}