.saecanet-html, .saecanet-body {
    margin: 0;
    padding: 0;
    height: 100%; 
}
.saecanet-body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    margin: 0; 
    padding: 20px; 
    background-color: #f4f4f9;
    color: #333;
    line-height: 1.6;
}

.saecanet-page-container {
    background-color: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
/*    max-width: 960px;*/
    margin: 20px auto;
}

.saecanet-main-title {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 25px;
    font-size: 2em;
}

.saecanet-usage-title,
.saecanet-preview-title,
.saecanet-explanation-title {
    margin-top: 35px;
    margin-bottom: 15px;
    border-bottom: 2px solid #007bff;
    padding-bottom: 8px;
    font-size: 1.6em;
    color: #34495e;
}
.saecanet-explanation-subtitle {
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 1.3em;
    color: #555;
}

.saecanet-usage-guide {
    margin-bottom: 30px;
    padding: 20px;
    background-color: #e9f7fd;
    border-left: 5px solid #007bff;
    border-radius: 5px;
}
.saecanet-usage-list {
    padding-left: 20px;
    margin-top: 0;
    list-style-type: decimal;
}
.saecanet-usage-item {
    margin-bottom: 10px;
}
.saecanet-usage-item:last-child {
    margin-bottom: 0;
}
.saecanet-important-note {
    color: #c0392b;
    font-weight: bold;
}

.saecanet-file-input-section {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.saecanet-file-input-trigger-button {
    display: inline-block;
    padding: 10px 15px;
    background-color: #6c757d;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-right: 10px;
    white-space: nowrap;
}
.saecanet-file-input-trigger-button:hover {
    background-color: #5a6268;
}

.saecanet-file-input-actual-hidden {
    opacity: 0;
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    z-index: -1;
}

.saecanet-file-name-display {
    font-style: italic;
    color: #555;
    margin-right: 15px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: calc(100% - 200px); 
}


.saecanet-column-select-label {
    display: block;
    margin-top: 15px;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.saecanet-column-select,
.saecanet-check-button,
.saecanet-reset-button {
    padding: 12px 15px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 1rem;
    transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out, background-color 0.3s ease, transform 0.1s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    min-width: 120px;
    border: none;
}

.saecanet-column-select:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
    outline: none;
}

.saecanet-column-select {
    width: 100%;
    max-width: 350px;
    background-color: #fff; 
    display: block;
}

.saecanet-check-button {
    background-color: #007bff;
    color: white;
}
.saecanet-check-button:hover {
    background-color: #0056b3;
    transform: translateY(-1px);
}
.saecanet-check-button:disabled {
    background-color: #adb5bd;
    cursor: not-allowed;
    transform: none;
}

.saecanet-reset-button {
    background-color: #dc3545;
    color: white;
}
.saecanet-reset-button:hover {
    background-color: #c82333;
    transform: translateY(-1px);
}
.saecanet-reset-icon {
}
.saecanet-reset-text {
}


.saecanet-csv-table-container {
    margin-top: 25px;
    max-height: 350px;
    overflow: auto;
    border: 1px solid #dee2e6;
    border-radius: 5px;
}

.saecanet-csv-table {
    width: 100%;
    border-collapse: collapse;
}

.saecanet-csv-table th,
.saecanet-csv-table td {
    border: 1px solid #dee2e6;
    padding: 10px 12px;
    text-align: left;
    white-space: nowrap;
}

.saecanet-csv-table th {
    background-color: #f8f9fa;
    color: #495057;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 1;
}

.saecanet-results-container {
    margin-top: 25px;
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
}

.saecanet-plot-container {
    border: 1px solid #dee2e6;
    padding: 15px;
    border-radius: 5px;
    background-color: #fff;
    flex: 1 1 400px; 
    min-width: 320px; 
    min-height: 400px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.saecanet-qqplot-explanation {
    margin-top: 35px;
    padding: 20px;
    background-color: #f9f9f9;
    border: 1px solid #e0e0e0;
    border-radius: 5px;
}
.saecanet-explanation-paragraph {
    margin-bottom: 12px;
}
.saecanet-explanation-list {
    padding-left: 25px;
    margin-bottom: 18px;
    list-style-type: decimal;
}
.saecanet-explanation-item {
    margin-bottom: 10px;
}
.saecanet-code-block {
    display: block;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    background-color: #eef1f3;
    padding: 10px 15px;
    border-radius: 4px;
    font-size: 0.9em;
    margin-top: 5px;
    overflow-x: auto;
    white-space: pre-wrap; 
    word-break: break-all; 
}
.saecanet-math-symbol {
    font-style: italic;
    font-family: "Times New Roman", Times, serif; 
}

.saecanet-hidden {
    display: none !important;
}

.saecanet-error-message {
    color: #721c24;
    margin-bottom: 15px;
    padding: 12px 15px;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: 5px;
    margin-left: 10px; 
}

.saecanet-data-error-message {
    color: #D8000C;
    background-color: #FFD2D2;
    border: 1px solid #D8000C;
    padding: 12px 15px;
    margin-bottom: 15px;
    border-radius: 5px;
    font-weight: bold;
    margin-left: 10px;
}


.saecanet-controls-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px; 
}
.saecanet-controls-container .saecanet-column-select-label {
    margin-bottom: 0;
    margin-right: 5px;
}
.saecanet-controls-container .saecanet-column-select {
    margin-bottom: 0;
    flex-grow: 1;
    max-width: 300px;
}


.saecanet-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    text-align: center;
}
.saecanet-footer-text {
    font-size: 0.9em;
    color: #777;
}

@media (max-width: 768px) { 
    .saecanet-page-container {
        padding: 15px 20px;
    }
    .saecanet-plot-container {
        flex-basis: 100%; 
    }
    .saecanet-controls-container {
        align-items: flex-start;
    }
    .saecanet-controls-container .saecanet-column-select {
        max-width: none;
        margin-bottom: 10px;
    }
    .saecanet-check-button, .saecanet-reset-button {
        width: 100%;
        margin-bottom: 10px;
    }
    .saecanet-controls-container .saecanet-column-select-label {
         margin-bottom: 5px;
    }
    .saecanet-file-input-section {
        flex-wrap: wrap;
    }
    .saecanet-file-name-display {
        max-width: 100%;
        margin-top: 5px;
        margin-left: 0;
        flex-basis: 100%; 
    }
    .saecanet-error-message, .saecanet-data-error-message {
        margin-left: 0;
        flex-basis: 100%;
        margin-top: 5px;
    }


}

@media (max-width: 600px) {
    .saecanet-main-title {
        font-size: 1.8em;
    }
    .saecanet-usage-title,
    .saecanet-preview-title,
    .saecanet-explanation-title {
        font-size: 1.4em;
    }
    .saecanet-explanation-subtitle {
        font-size: 1.15em;
    }
}