body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #0079bf;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    box-sizing: border-box;
}

#app {
    width: 100%;
    max-width: 1200px;
}

.board {
    display: flex;
    gap: 10px;
    align-items: flex-start; 
}

.column {
    background-color: #ebecf0;
    border-radius: 3px;
    width: 300px; 
    padding: 8px;
    display: flex;
    flex-direction: column;
    min-height: 100px;
    box-shadow: 0 1px 0 rgba(9,30,66,.25);
}

.column__header {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 8px 0;
    padding: 0 8px;
    color: #172b4d;
}

.column__cards {
    flex-grow: 1; 
    min-height: 5px;
}

.card {
    background-color: #fff;
    border-radius: 3px;
    box-shadow: 0 1px 0 rgba(9,30,66,.25);
    margin-bottom: 8px;
    padding: 6px 8px;
    position: relative;
    word-wrap: break-word; 
    cursor: grab;
}

    .card:last-child {
        margin-bottom: 0;
    }

    .card:hover {
        background-color: #f4f5f7;
        cursor: grab;
    }

    .card.dragging { 
        opacity: 0.7;
        cursor: grabbing;
    }

.card__delete-icon {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 18px;
    color: #6b778c;
    cursor: pointer;
    opacity: 0; 
    transition: opacity 0.2s ease-in-out;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.card:hover .card__delete-icon {
    opacity: 1; 
}

.card__delete-icon:hover {
    color: #172b4d;
    background-color: rgba(0, 0, 0, 0.1);
}


.add-card-btn {
    background-color: #ebecf0;
    color: #5e6c84;
    border-radius: 3px;
    border: none;
    cursor: pointer;
    padding: 8px 12px;
    font-size: 14px;
    text-align: left;
    width: 100%;
    transition: background-color 0.2s ease-in-out;
}

    .add-card-btn:hover {
        background-color: #dfe1e6;
        color: #172b4d;
    }


.add-card-form {
    background-color: #fff;
    border-radius: 3px;
    padding: 6px 8px;
    margin-bottom: 8px;
    box-shadow: 0 1px 0 rgba(9,30,66,.25);
}

.add-card-textarea {
    border: none;
    resize: vertical;
    width: calc(100% - 16px); 
    min-height: 40px;
    max-height: 160px;
    padding: 8px;
    box-sizing: border-box;
    font-size: 14px;
    margin-bottom: 8px;
    outline: none;
    border-radius: 3px;
    background-color: #f4f5f7;
}

.add-card-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.add-card-confirm {
    background-color: #0079bf;
    color: #fff;
    border: none;
    border-radius: 3px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
}

    .add-card-confirm:hover {
        background-color: #026aa7;
    }

.add-card-cancel {
    background: none;
    border: none;
    color: #6b778c;
    font-size: 24px;
    cursor: pointer;
    padding: 0 5px;
}

    .add-card-cancel:hover {
        color: #172b4d;
    }


.card-placeholder {
    background-color: rgba(0, 0, 0, 0.1);
    border: 2px dashed #a0a0a0;
    border-radius: 3px;
    margin-bottom: 8px;

    min-height: 20px; 
}