:root {
   --bg-color: #f0f2f5;
   --text-color: #000;
   --header-bg: #4CAF50;
   --card-bg: #fff;
 }

 [data-theme="dark"] {
   --bg-color: #121212;
   --text-color: #eee;
   --header-bg: #2e7d32;
   --card-bg: #1e1e1e;
 }

 * {
   box-sizing: border-box;
 }

 body {
   font-family: Arial, sans-serif;
   background-color: var(--bg-color);
   color: var(--text-color);
   margin: 0;
   padding: 0;
 }

 header {
   background-color: var(--header-bg);
   color: white;
   padding: 20px 0;
   text-align: center;
 }

 main {
   padding: 20px;
   max-width: 800px;
   margin: auto;
 }

 .input-wrapper {
   display: flex;
   flex-wrap: wrap;
   gap: 10px;
   justify-content: center;
   margin-bottom: 20px;
 }

 input[type="text"],
 input[type="date"],
 select {
   padding: 10px;
   font-size: 16px;
   flex: 1 1 200px;
   min-width: 150px;
 }

 .btn {
   padding: 10px 16px;
   font-size: 16px;
   border: none;
   color: white;
   cursor: pointer;
   border-radius: 5px;
   flex-shrink: 0;
 }

 .btn-adicionar {
   background-color: #4CAF50;
 }

 .btn-editar {
   background-color: #FFA500;
 }

 .btn-excluir {
   background-color: #F44336;
 }

 .btn:hover {
   opacity: 0.9;
 }

 ul {
   list-style: none;
   padding: 0;
 }

 li {
   background-color: var(--card-bg);
   margin: 10px 0;
   padding: 10px;
   box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
   display: flex;
   flex-direction: column;
   gap: 10px;
   touch-action: pan-y;
 }

 li.concluida span {
   text-decoration: line-through;
   color: gray;
 }

 .botoes {
   display: flex;
   gap: 10px;
   flex-wrap: wrap;
   justify-content: flex-end;
 }

 .filtros {
   margin-top: 20px;
   text-align: center;
 }

 .filtros .btn {
   background-color: #888;
   margin: 0 5px;
 }

 .filtro-btn.active {
   background-color: #2e7d32;
 }

 @media (max-width: 600px) {
   .btn {
     font-size: 14px;
     padding: 8px 12px;
   }

   input,
   select {
     font-size: 14px;
   }

   li {
     padding: 8px;
   }
 }