.calculation-main-container {
    width: 100%;
    margin: 0;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
}

.main-title {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 10px;
}

.page-description.site-description {
    font-size: 0.95em;
    color: #555;
    line-height: 1.6;
    margin-bottom: 25px;
    text-align: left;
    padding: 0 10px;
}

.element-rows-wrapper {
    margin-bottom: 20px;
}

.element-row.dynamic-element-row {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #f9f9f9;
    flex-wrap: wrap;
    gap: 10px;
}

.element-row.dynamic-element-row .element-selector.select-css,
.element-row.dynamic-element-row .count-input.input-css {
    padding: 8px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1em;
    box-sizing: border-box;
}

.element-row.dynamic-element-row .element-selector.select-css {
    flex-grow: 1;
    min-width: 200px;
}

.element-row.dynamic-element-row .count-input.input-css {
    width: 80px;
    flex-grow: 0;
    text-align: center;
}

.element-row.dynamic-element-row .delete-row-btn.button.remove-button {
    padding: 8px 12px;
    font-size: 0.9em;
    color: #fff;
    background-color: #e74c3c;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    flex-shrink: 0;
}

.element-row.dynamic-element-row .delete-row-btn.button.remove-button:hover {
    background-color: #c0392b;
}

.action-buttons-row.main-action-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    align-items: stretch;
}

.main-controls {
    flex-grow: 1;
    display: flex;
}

.main-controls .button.add-button {
    padding: 10px 20px;
    font-size: 1em;
    color: #fff;
    background-color: #66cdaa;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    width: 100%;
}

.main-controls .button.add-button:hover {
    background-color: #57b398;
}

button#calculateButton.calculate-execution-button {
    display: block;
    flex-grow: 1;
    padding: 12px 20px;
    font-size: 1.1em;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
button#calculateButton.calculate-execution-button:hover {
    background-color: #0056b3;
}

.result-container {
    background-color: #fff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    box-sizing: border-box;
}
.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.result-header .result-title-text {
    margin: 0;
    color: #0056b3;
    font-size: 1.3em;
}

.result-output-area {
    width: 100%;
    box-sizing: border-box;
    min-height: 100px;
    padding: 10px;
    font-size: 1.1em;
    border: 1px solid #ccc;
    border-radius: 4px;
    background-color: #e9ecef;
    white-space: pre-wrap;
    word-wrap: break-word;
    line-height: 1.6;
}

.result-output-area sub {
    font-size: 0.75em;
    vertical-align: sub;
    line-height: 0;
}
.result-output-area.error-message {
    color: red;
    font-weight: bold;
}

@media (max-width: 600px) {
    .action-buttons-row.main-action-buttons {
        flex-direction: column;
    }
    .result-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .header-buttons.action-buttons-group {
        flex-wrap: wrap;
    }

    .element-row.dynamic-element-row {
        flex-direction: column;
        align-items: stretch;
    }
    .element-row.dynamic-element-row .element-selector.select-css,
    .element-row.dynamic-element-row .count-input.input-css,
    .element-row.dynamic-element-row .delete-row-btn.button.remove-button {
        width: 100%;
        margin-right: 0;
        margin-left: 0;
    }
    .element-row.dynamic-element-row .element-selector.select-css {
        min-width: auto;
    }
}

.header-buttons.action-buttons-group {
    display: flex;
    align-items: center;
}

.header-buttons.action-buttons-group .button {
    width: auto;
    height: 32px;
    padding: 5px 10px;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
    position: relative;
    flex-shrink: 0;
    gap: 5px;
}

.header-buttons.action-buttons-group .button .icon {
    width: 18px;
    height: 18px;
    fill: white;
}

.header-buttons.action-buttons-group .button span:not(.copy-tooltip) {
    font-size: 0.9em;
    line-height: 1;
}

button#copyBtn.copy-action-button {
    background-color: #6c757d;
    margin-right: 10px;
}

button#copyBtn.copy-action-button:hover {
    background-color: #5a6268;
}

button#copyBtn.copy-action-button .copy-tooltip.tooltip-text {
    visibility: hidden;
    width: 80px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    position: absolute;
    z-index: 1;
    bottom: 110%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s, visibility 0.3s, background-color 0.3s;
    font-size: 0.8em;
    white-space: nowrap;
    pointer-events: none;
}

button#copyBtn.copy-action-button.copied .copy-tooltip.tooltip-text {
    visibility: visible;
    opacity: 1;
    background-color: #28a745;
}

button#copyBtn.copy-action-button.copied[data-copy-state="error"] .copy-tooltip.tooltip-text {
    background-color: #dc3545;
}

button#resetBtn.reset-action-button {
    background-color: #dc3545;
}

button#resetBtn.reset-action-button:hover {
    background-color: #c82333;
}