@import url(https://fonts.googleapis.com/css?family=Poppins:100,100italic,200,200italic,300,300italic,regular,italic,500,500italic,600,600italic,700,700italic,800,800italic,900,900italic);

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins',sans-serif;
}

:root{
    --primary: #7749f8;
    --primary-light: #9775fa;
    --dark: #212529;
    --light: #f8f9fa;
    --gray: #868e96;
    --danger: #fa5252;
    --success: #40c057;
    --border: #e9ecef;
}

body{
    background-color: #eee6fa;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--dark);
}

.container{
    width: 100%;
    max-width: 500px;
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

header{
    background-color: var(--primary);
    color: white;
    padding: 20px 25px;
}

header h1{
    font-size: 24px;
    margin-bottom: 5px;
    font-weight: 600;
}

header p{
    font-size: 14px;
    opacity: 0.9;
}

.todo-input{
    padding: 20px 25px;
    display: flex;
    gap: 10px;
    background-color: var(--light);
    border-bottom: 1px solid var(--border);
}

.todo-input input{
    flex: 1;
    padding: 12px 15px;
    border: 1px solid #dee2e6;
    font-size: 1rem;
    transition: all 0.2s;
    border-radius: 6px;
}

.todo-input input:focus{
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(119,73,248,0.2);
}

.todo-input button{
    background-color: var(--primary);
    color: white;
    margin-top: 5px;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.todo-input button:hover{
    background-color: var(--primary-light);
}

.filters{
    display: flex;
    gap: 15px;
    border-bottom: 1px solid var(--border);
    padding: 15px 25px;
}

.filter{
    padding: 5px 3px;
    cursor: pointer;
    color:var(--gray);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.filter:hover{
    color: var(--primary);
}

.filter:active{
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
    font-weight: 500;
}

.todo-container{
    padding: 15px 0;
    max-height: 300px;
    overflow-y: auto;
}

#todo-list{
    list-style-type: none;
}

.todo-item{
    padding: 12px 15px;
    display: flex;
    align-items: center;
    transition: background-color 0.2s;
}

.todo-item:hover{
    background-color: var(--light);
}

.checkbox-container{
    margin-right: 15px;
}

.todo-checkbox{
    opacity: 0;
    position: absolute;
}

 .checkmark{
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #dee2e6;
    border-radius: 4px;
    position: relative;
    cursor: pointer;
    transition: all 0.2s;
 }

 .todo-checkbox:checked + .checkmark{
    background-color: var(--success);
    border-color: var(--success);
 }

 .todo-checkbox:checked + .checkmark::after{
    content: "";
    position: absolute;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
 }

 .todo-item-text{
    flex: 1;
    font-size: 1rem;
    transition: all 0.2s;
 }

 .todo-item.completed .todo-item-text{
    text-decoration: line-through;
    color: var(--gray);
 }

 .delete-btn{
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 16px;
    opacity: 0;
    transition: all 0.2s;
}

.todo-item:hover .delete-btn{
    opacity: 1;
}

.delete-btn:hover{
    color: var(--danger);
}

.empty-state{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    color: var(--gray);
}

.empty-state i{
    font-size: 40px;
    margin-bottom: 10px;
    opacity: 0.7;
}

.hidden{
    display: none;
}

footer{
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    border-top: 1px solid var(--border);
    background-color: var(--light);
    font-size: 14px;
}

#items-left{
    color: var(--gray );
}

#clear-completed{
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s;
}

#clear-completed:hover{
    color: var(--danger);
}