:root {
    --color-white: #ffffff;
    --color-whitesmoke: #f5f5f5;
    --color-black-80: #333333;
    --color-gray: #444444;
    --color-lightgray: #dddddd;

    --color-skyblue: skyblue;
	--color-blue: #2196F3;
    --color-green: green;
    --color-orange: #ff9800;
    --color-red: #f44336;

    /* light backgrounds (tints) */
    --color-blue-light: #e7f3ff;
    --color-green-light: #e6f4ea;
    --color-orange-light: #fff4e5;
    --color-red-light: #fdecea;
}

body { 
    font-family: Arial; 
    background: var(--color-whitesmoke); 
    padding: 20px; 
}

.container_CLASS {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 15px;
}

.column_CLASS {
    background: var(--color-black-80); 
    color: var(--color-white);
    padding: 10px; 
    border-radius: 8px;
}

.column-header_CLASS { 
    font-weight: bold; 
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px; 
}

.arrow_CLASS {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.column-header_CLASS.collapsed .arrow_CLASS {
    transform: rotate(-90deg);
}

.options_CLASS {
    max-height: none;
    overflow: visible;
    transition: max-height 0.3s ease;
}

.options_CLASS.collapsed {
    max-height: 0;
    overflow: hidden;
}

.column-actions_CLASS {
    margin: 5px 0;
    display: flex;
    gap: 5px;
}

.column-actions_CLASS button {
    font-size: 12px;
    padding: 4px 6px;
    background: var(--color-lightgray);
    cursor: pointer;
}

button {
    margin: 8px;
    padding: 10px 15px;
    font-size: 18px;
    border-radius: 8px;
    border: 1px;
    cursor: pointer;
    background: var(--color-skyblue);
}

.results_CLASS { 
    margin-top: 20px; 
    background: var(--color-white); 
    padding: 10px; 
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
}

.note_CLASS {
    margin-top: 10px;
    padding: 10px;
    border-radius: 6px;
    color:var(--color-gray);
    font-weight: 500;
}

.note-info {
    background-color: var(--color-blue-light);
    border-left: 5px solid var(--color-blue);
}

.note-success {
    background-color: var(--color-green-light);
    border-left: 5px solid var(--color-green);
}

.note-warning {
    background-color: var(--color-orange-light);
    border-left: 5px solid var(--color-orange);
}

.note-error {
    background-color: var(--color-red-light);
    border-left: 5px solid var(--color-red);
}


.responsive-img_CLASS {
    max-width: 100%;
    height: auto;
}

.green-line {
    border: none;
    height: 2px;
    background-color: var(--color-green);
    margin: 20px 0;
}

.blue-line {
    border: none;
    height: 2px;
    background-color: var(--color-blue);
    margin: 20px 0;
}

.spaced-list li {
  margin-bottom: 20px; /* creates blank line effect */
}