.matrix-container {
    position: relative;
    padding: 0 20px;
}
.matrix-container::before, .matrix-container::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 20px;
    border: 2px solid #a0aec0;
}
.matrix-container::before {
    left: 0;
    border-right: none;
    border-radius: 20px 0 0 20px;
}
.matrix-container::after {
    right: 0;
    border-left: none;
    border-radius: 0 20px 20px 0;
}
.result-matrix {
    display: inline-block;
    position: relative;
    padding: 0 15px;
    margin: 0 10px;
    vertical-align: middle;
}
.result-matrix::before, .result-matrix::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 15px;
    border: 1px solid #a0aec0;
}
.result-matrix::before {
    left: 0;
    border-right: none;
    border-radius: 15px 0 0 15px;
}
.result-matrix::after {
    right: 0;
    border-left: none;
    border-radius: 0 15px 15px 0;
}
.op-symbol {
    display: inline-block;
    vertical-align: middle;
    font-size: 2em;
    margin: 0 15px;
}
.tab-button.active {
    background-color: #4a5568; /* gray-700 */
    color: white;
}
#molecule-viewer-canvas {
    background-color: #e2e8f0; /* light gray for background */
}
body {
    background-color: #1f2937; /* bg-gray-800 */
    color: #d1d5db; /* text-gray-300 */
    font-family: sans-serif;
}
.orbital-box {
    border: 1px solid #a0aec0;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 4px;
    color: #f3f4f6; /* text-gray-100 */
}