body {
    font-family: Segoe UI;
    background: #f4f6fb;
    padding: 20px;
}

h2 {
    margin-top: 0;
}

#formulaControls {
    border: 0;
    margin: 0;
    padding: 0;
    min-width: 0;
}

#editorStatus.is-error {
    color: #b42318;
}

button:disabled {
    cursor: wait;
    opacity: .6;
}

.copy-guide {
    margin: 0 0 12px;
    padding: 10px;
    border: 1px solid #ccd6e8;
    background: white;
    line-height: 1.5;
}

.copy-guide summary {
    cursor: pointer;
    font-weight: 600;
}

.copy-guide code {
    overflow-wrap: anywhere;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
}

button {
    padding: 6px 10px;
    border: 1px solid #ccc;
    background: white;
    cursor: pointer;
    font-size: 14px;
}

    button:hover {
        background: #e8eefc;
    }

math-field {
    width: 100%;
    font-size: 26px;
    border: 1px solid #ccc;
    padding: 10px;
    background: white;
}

.preview {
    margin-top: 10px;
    padding: 10px;
    background: white;
    border: 1px solid #ccc;
    min-height: 60px;
}

.palette {
    display: grid;
    grid-template-columns: repeat(12,40px);
    gap: 4px;
    margin-top: 10px;
}

    .palette button {
        width: 40px;
        height: 34px;
        padding: 0;
    }

.tabs {
    margin-top: 10px;
}

    .tabs button {
        margin-right: 5px;
    }

.matrix-picker {
    display: grid;
    grid-template-columns: repeat(8,20px);
    gap: 2px;
    margin-top: 6px;
}

.matrix-cell {
    width: 20px;
    height: 20px;
    background: #ddd;
    padding: 0;
}

.matrix-cell.is-selected {
    background: #4a90e2;
}

#exportArea {
    position: absolute;
    left: -9999px;
}

.formula-export {
    display: inline-block;
    font-size: 16px;
    line-height: 1;
    padding: 0;
    margin: 0;
}


.katex {
    line-height: 1.2;
}

.katex-display {
    margin: 0 !important;
}

    .katex-display > .katex {
        padding: 0 !important;
    }