* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}


body {
    background-color: #000;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 50px;
   
}


.container {
    width: 100%;
    max-width: 500px;
    padding: 30px;
    background-color: #1a1a1a;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.1);
    margin-top: 100px;
}


.container h1 {
    text-align: center;
    margin-bottom: 20px;
    color: cornflowerblue;
}

.input-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#todo-input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #444;
    border-radius: 8px;
    font-size: 16px;
    background-color: #111;
    color: #f5f5f5;
    transition: border-color 0.3s, background-color 0.3s;
}

#todo-input:focus {
    border-color:cornflowerblue;
    outline: none;
}


#add-task-btn {
    padding: 12px 20px;
    border: none;
    background-color: cornflowerblue;
    color: black;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#add-task-btn:hover {
    background-color:rgb(93, 135, 212);
}


#todo-list {
    list-style: none;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 5px;
}


#todo-list li {
    background-color: #111;
    padding: 12px 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 8px rgba(190, 181, 181, 0.043);
    color: #f5f5f5;
    transition: all 0.2s ease-in-out;
}

#todo-list li:hover {
    transform: translateY(-1px);
    background-color: #1a1a1a;
}


.delete-btn {
    background-color: #ff4d4d;
    border: none;
    color: white;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.delete-btn:hover {
    background-color: #e60000;
    
}


#todo-list::-webkit-scrollbar {
    width: 6px;
}

#todo-list::-webkit-scrollbar-thumb {
    background-color: #B379E7;
    border-radius: 10px;
}

#todo-list::-webkit-scrollbar-track {
    background-color: #000;
}


.completed {
    text-decoration: line-through; 
    opacity: 0.6;
    transition: opacity 0.3s, text-decoration 0.3s;
}