html, body {
    height: 100%;
    margin: 0;
}
body {
    display: flex;
    flex-direction: column;
}
#paper {
    width: 100%;
    flex: 1;
    min-height: 0;
    display: block;
    margin: auto;
    border: solid;
}
.buttons {
    display: flex;
    gap: 10px;
}
#layoutButtons {
    display: flex;
    gap: 4px;
}
.filters-container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0;
    font-family: sans-serif;
    font-size: 14px;
}
.filters-label {
    font-weight: bold;
}
#categoryFilters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.filter-dropdown {
    position: relative;
}
.filter-dropdown-toggle {
    cursor: pointer;
    border: 1px solid #ccc;
    border-radius: 4px;
    background: #f9f9f9;
    padding: 4px 10px;
    font-size: 13px;
}
.filter-dropdown.open .filter-dropdown-toggle {
    background: #e3edff;
    border-color: #3b82f6;
}
.filter-dropdown-partial .filter-dropdown-toggle {
    border-color: #3b82f6;
    border-style: dashed;
}
.filter-dropdown-empty .filter-dropdown-toggle {
    color: #999;
}
.filter-dropdown-panel {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    z-index: 20;
    background: white;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 8px 12px;
    min-width: 180px;
    max-height: 320px;
    overflow-y: auto;
}
.filter-dropdown.open .filter-dropdown-panel {
    display: block;
}
.filter-category-label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
    padding-bottom: 6px;
    border-bottom: 1px solid #ddd;
    cursor: pointer;
}
.filter-kind-label {
    display: block;
    margin-left: 4px;
    margin-bottom: 2px;
    cursor: pointer;
    white-space: nowrap;
}
#tooltip {
    position: absolute;
    display: none;
    background: white;
    border: solid;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 15px;
}
input[type="checkbox"] {
    accent-color: #3b82f6;
}