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

body{
    background:#77757a;
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
}

.todo-container{
    width:400px;
    background:#575258;
    padding:25px;
    box-shadow:0 5px 15px rgba(0,0,0,0.3);
}

h1{
    text-align:center;
    color:white;
    margin-bottom:20px;
}

.input-box{
    display:flex;
    margin-bottom:15px;
}

.input-box input{
    flex:1;
    padding:14px;
    border:none;
    outline:none;
    font-size:16px;
}

.input-box button{
    background:#22d642;
    color:white;
    border:none;
    padding:14px 20px;
    cursor:pointer;
    font-weight:bold;
    transition:0.3s;
}

.input-box button:hover{
    background:#18b436;
}

#taskCounter{
    color:white;
    margin-bottom:15px;
    font-size:16px;
}

.task{
    display:flex;
    justify-content:space-between;
    align-items:center;
    background:white;
    margin-bottom:10px;
}

.task span{
    padding:15px;
    font-size:18px;
    flex:1;
}

.completed{
    text-decoration:line-through;
    color:gray;
}

.buttons{
    display:flex;
}

.complete-btn{
    background:#22d642;
    color:white;
    border:none;
    width:50px;
    height: 50px;
    cursor:pointer;
    transition:0.3s;
}

.complete-btn:hover{
    background:#18b436;
}

.delete-btn{
    background:#ff4b4b;
    color:white;
    border:none;
    width:50px;
    height: 50px;
    cursor:pointer;
    transition:0.3s;
}

.delete-btn:hover{
    background:#e63939;
}