/* --- Main Calculator Wrapper --- */
.mswc-calculator-wrapper {
    background-color: #f9f9f9;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 25px;
    /*max-width: 700px;*/
    margin: 20px auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #333;
}

.mswc-form-container h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: #004d40; /* Dark teal */
    text-align: center;
    font-size: 22px;
}

/* --- Input Grid --- */
.mswc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px 20px;
}

/* --- Input Groups & Fields --- */
.mswc-input-group {
    display: flex;
    flex-direction: column;
}

.mswc-input-group label {
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 14px;
}

.mswc-input-group select,
.mswc-input-group input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

.mswc-input-group select:focus,
.mswc-input-group input[type="number"]:focus {
    outline: none;
    border-color: #004d40;
}

.mswc-input-group select {
    margin-bottom: 20px;
}

.mswc-input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.mswc-input-with-unit .mswc-unit {
    position: absolute;
    right: 10px;
    color: #777;
    font-size: 14px;
    pointer-events: none;
    padding-right: 20px;
}

/* --- Unit Switcher --- */
.mswc-unit-switcher {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.mswc-unit-switcher label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
}

.mswc-unit-switcher input[type="radio"] {
    margin-right: 15px;
    scale: 200%;
}

/* --- Results Section --- */
.mswc-results-container {
    background-color: #e0f2f1; /* Light teal */
    border-radius: 8px;
    padding: 20px;
    margin-top: 25px;
    border-left: 5px solid #004d40;
    position: relative;
}

.mswc-results-container h4 {
    margin-top: 0;
    margin-bottom: 15px;
    color: #004d40;
    display: flex;
    align-items: center;
}

.mswc-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 16px;
    padding: 10px 0;
}

.mswc-result-item + .mswc-result-item {
    border-top: 1px solid #b2dfdb;
}

.mswc-result-value {
    font-weight: 700;
    font-size: 18px;
    color: #333;
}

.mswc-total-weight .mswc-result-value {
    font-size: 22px;
    color: #004d40;
}

/* --- AJAX Loader Spinner --- */
.mswc-loader {
    display: inline-block;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #00796b;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    animation: mswc-spin 1s linear infinite;
    margin-left: 10px;
}

@keyframes mswc-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Error Message --- */
.mswc-error {
    background-color: #ffebee;
    color: #c62828;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
}

/* --- Density Table --- */
.mswc-density-table-wrapper {
    margin: 40px auto;
    max-width: 700px;
}
.mswc-density-table-wrapper h4 {
    text-align: center;
    color: #333;
    font-size: 18px;
}
.mswc-density-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.mswc-density-table th, .mswc-density-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}
.mswc-density-table th { background-color: #f5f5f5; font-weight: 600; }
.mswc-density-table tbody tr:nth-child(even) { background-color: #fafafa; }

/* --- Responsive Design --- */
@media (max-width: 600px) {
    .mswc-grid { grid-template-columns: 1fr; }
}