:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --background-color: #f5f7fa;
    --card-color: #ffffff;
    --text-color: #333333;
    --border-color: #e1e8ed;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

header {
    grid-column: 1 / -1;
    text-align: center;
    margin-bottom: 20px;
    padding: 20px;
    background-color: var(--card-color);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    margin-bottom: 10px;
}

.back-button {
    border: none;
    background: none;
    cursor: pointer;
    padding: 5px;
    width: fit-content;
}

.back-button i {
    font-size: xx-large;
    color: var(--primary-color);
}

h1 {
    color: var(--primary-color);
    margin: 0;
    flex: 1;
}

.description {
    color: #7f8c8d;
    max-width: 800px;
    margin: 0 auto;
}

.panels-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
    align-items: start;
}

.panel {
    background-color: var(--card-color);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    height: 100%;
    min-height: 500px;
    display: flex;
    flex-direction: column;
}

.panel-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.panel-scrollable {
    flex: 1;
    overflow-y: auto;
    max-height: 600px;
    padding-right: 5px;
}

.panel-scrollable::-webkit-scrollbar {
    width: 6px;
}

.panel-scrollable::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.panel-scrollable::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.panel-scrollable::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

.panel h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.form-group {
    margin-bottom: 15px;
    flex-shrink: 0;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

input,
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
}

textarea {
    min-height: 200px;
    resize: vertical;
}

.color-picker {
    display: flex;
    gap: 10px;
    align-items: center;
}

.color-picker input {
    width: 60px;
    height: 40px;
    padding: 0;
    border: none;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.3s;
    width: 100%;
    margin-top: 10px;
}

button:hover {
    background-color: var(--secondary-color);
}

.preview-container {
    background-color: var(--card-color);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    display: flex;
    flex-direction: column;
}

#sankey_chart {
    width: 100%;
    height: 600px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.data-examples {
    margin-top: 15px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.example-btn {
    background-color: #f1f2f6;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    width: auto;
    margin: 0;
}

.example-btn:hover {
    background-color: #dfe4ea;
}

.export-options {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-shrink: 0;
}

.export-options button {
    width: auto;
    flex: 1;
}

footer {
    grid-column: 1 / -1;
    text-align: center;
    margin-top: 30px;
    color: #7f8c8d;
    font-size: 14px;
    padding: 20px;
}

/* Styles pour le système de données */
.data-inputs {
    margin-top: 20px;
}

.data-row {
    display: grid;
    grid-template-columns: 1fr 1fr 100px 50px 40px;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
    padding: 10px;
    border-radius: 5px;
    background-color: #f9f9f9;
    transition: all 0.3s;
}

.data-row:hover {
    background-color: #f0f0f0;
}

.data-row input {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.color-selector {
    position: relative;
    display: flex;
    align-items: center;
    gap: 5px;
}

.color-preview-small {
    width: 25px;
    height: 25px;
    border-radius: 4px;
    border: 2px solid #ddd;
    cursor: pointer;
    transition: all 0.3s;
}

.color-preview-small:hover {
    border-color: #999;
    transform: scale(1.1);
}

.color-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    grid-template-columns: repeat(5, 1fr);
    gap: 5px;
    padding: 10px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 150px;
}

.color-dropdown.active {
    display: grid;
}

.color-option-small {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    border: 1px solid #ddd;
    cursor: pointer;
    transition: all 0.2s;
}

.color-option-small:hover {
    transform: scale(1.2);
    border-color: #666;
}

.btn-add {
    background-color: var(--success-color);
    width: 100%;
    margin: 0;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.btn-add:hover {
    background-color: #27ae60;
}

.btn-remove {
    background-color: var(--danger-color);
    width: 100%;
    margin: 0;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.btn-remove:hover {
    background-color: #c0392b;
}

.data-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-shrink: 0;
}

.data-actions button {
    width: auto;
    flex: 1;
    margin: 0;
}

.data-summary {
    margin-top: 15px;
    padding: 10px;
    background-color: #f0f7ff;
    border-radius: 5px;
    border-left: 4px solid var(--primary-color);
    flex-shrink: 0;
}

.data-summary h3 {
    margin-bottom: 5px;
    color: var(--primary-color);
}

.data-tabs {
    display: flex;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.data-tab {
    padding: 10px 15px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}

.data-tab.active {
    border-bottom: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.data-content {
    display: none;
}

.data-content.active {
    display: block;
}

.color-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-top: 10px;
}

.color-option {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.color-option label {
    font-size: 14px;
    font-weight: normal;
}

.color-preview {
    width: 100%;
    height: 30px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.advanced-options {
    margin-top: 20px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    display: none;
}

.advanced-options.active {
    display: block;
}

.advanced-options h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.toggle-advanced {
    background-color: #6c757d;
    font-size: 14px;
    padding: 8px 15px;
    margin-bottom: 0;
    flex-shrink: 0;
}

.toggle-advanced:hover {
    background-color: #5a6268;
}

.generate-button-container {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.generate-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s;
    width: auto;
    min-width: 200px;
}

.generate-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Styles pour les messages d'erreur */
.error-message {
    color: var(--danger-color);
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

.data-row.error {
    border: 1px solid var(--danger-color);
    background-color: #ffeaea;
}

.loading-overlay {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@media (max-width: 1024px) {
    .panels-container {
        grid-template-columns: 1fr;
    }

    .panel {
        min-height: auto;
    }

    .panel-scrollable {
        max-height: none;
    }
}

@media (max-width: 768px) {
    .data-row {
        grid-template-columns: 1fr;
        gap: 5px;
    }

    .data-actions {
        flex-direction: column;
    }

    .color-dropdown {
        width: 120px;
        grid-template-columns: repeat(4, 1fr);
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .back-button {
        margin-right: 0;
        margin-bottom: 10px;
    }
}