:root {
    --color-primary: #2B3A67;
    --color-secondary: #F0F2F5;
    --color-accent: #64C9A7;
    --color-primary-action: #4A90E2;
    --color-warning: #FFC107;
    --color-text-main: #333333;
    --color-text-secondary: #757575;
    --color-background: #FFFFFF;
    --color-success: #5CB85C;
    --color-info: #2B3A67;
    --color-error: #D9534F;
    --color-border: #D1D5DB;
    --color-highlight: #FFFACD;
    --font-primary: 'Figtree', sans-serif;
    --text-regular: 400;
    --text-medium: 500;
    --text-semibold: 600;
    --text-bold: 700;
    --container-max-width: 900px;
    --spacing-unit: 1rem;
    
}

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

html {
    font-size: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text-main);
    background-color: var(--color-secondary); /* CHANGEMENT ICI */
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 0 var(--spacing-unit);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.app-header {
    text-align: center;
    padding: calc(var(--spacing-unit) * 1.5) 0;
    border-bottom: 1px solid var(--color-secondary);
}

.app-header h1 {
    font-weight: var(--text-bold);
    font-size: 5rem;
    background: linear-gradient(125deg, var(--color-primary), var(--color-accent), var(--color-primary-action), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    /* AJOUTS CI-DESSOUS */
    background-size: 400% 400%;
    animation: plasma-flow 15s ease-in-out infinite;
}

.app-main {
    flex-grow: 1;
    width: 90%; /* Le conteneur fait 90% de la largeur de l'écran */
    max-width: 1600px; /* Mais ne dépassera jamais 1600px */
    margin: 0 auto; /* Reste centré */
    padding: calc(var(--spacing-unit) * 2) 0;
}

.file-interaction-section {
    background-color: var(--color-background);
    padding: calc(var(--spacing-unit) * 2.5); /* Un peu plus d'espace interne */
    border-radius: 12px; /* Coins plus arrondis */
    border: 1px solid #E5E7EB; /* Bordure plus douce */
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1); /* Ombre moderne */
    text-align: center;
}

.welcome-zone .invitation-message {
    font-size: 1.25rem;
    color: var(--color-text-main);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    font-weight: var(--text-medium);
}

.file-input-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-unit);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

#fileInput {
    display: none;
}

.button-browse {
    background-color: var(--color-secondary);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    font-weight: var(--text-medium);
}

.button-browse:hover,
.button-browse:focus {
    background-color: #e0e3e8;
    border-color: #1e2a4a;
}

.file-selected-zone {
    margin-top: var(--spacing-unit);
    padding: var(--spacing-unit);
    background-color: var(--color-secondary);
    border-radius: 4px;
    border: 1px dashed var(--color-border);
}

.file-selected-zone p {
    margin-bottom: var(--spacing-unit);
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.file-selected-zone .file-name {
    font-weight: var(--text-medium);
    color: var(--color-text-main);
}

.button {
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    border: none;
    border-radius: 6px;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: var(--text-medium);
    cursor: pointer;
    transition: background-color 0.2s ease-in-out, transform 0.1s ease, border-color 0.2s ease-in-out;
    min-width: 160px;
    margin: calc(var(--spacing-unit) * 0.25);
}

.button:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

.button:active {
    transform: translateY(1px);
}

.button-primary {
    background-color: var(--color-primary); /* Couleur principale plus affirmée */
    color: var(--color-background);
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05); /* Petite ombre */
}

.button-primary:hover,
.button-primary:focus {
    background-color: #1e2a4a; /* Assombrissement au survol */
}

.button-primary:disabled {
    background-color: #a0c4e8;
    cursor: not-allowed;
    color: #748ead;
}

.button-accent {
    background-color: var(--color-accent);
    color: var(--color-background);
}

.button-accent:hover,
.button-accent:focus {
    background-color: #52b393;
}

.button-accent:disabled {
    background-color: #b0d9cb;
    cursor: not-allowed;
    color: #78a093;
}

.button-success {
    background-color: var(--color-success);
    color: var(--color-background);
}

.button-success:hover,
.button-success:focus {
    background-color: #4a934a;
}

.button-warning {
    background-color: var(--color-warning);
    color: var(--color-text-main);
}

.button-warning:hover,
.button-warning:focus {
    background-color: #e0a800;
}

.button-secondary {
    background-color: transparent; /* Fond transparent */
    color: var(--color-text-secondary);
    border: 1px solid transparent; /* Pas de bordure visible */
}

.button-secondary:hover,
.button-secondary:focus {
    background-color: var(--color-secondary); /* Léger fond au survol */
    color: var(--color-text-main);
}

.security-message {
    margin-top: calc(var(--spacing-unit) * 2.5);
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    background-color: var(--color-background); /* Fond blanc pour un effet "carte" */
    border-radius: 8px; /* Bords arrondis cohérents */
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    border: 1px solid #E5E7EB; /* Bordure subtile, comme la carte principale */
    border-left: 4px solid var(--color-accent); /* Accent de couleur verte pour la sécurité/confiance */
    text-align: center; /* Centrage du texte */
}

.security-message p {
    margin: 0;
}

.status-zone {
    margin-top: calc(var(--spacing-unit) * 1.5);
    min-height: calc(var(--spacing-unit) * 2.5);
}

.status-message {
    font-size: 1rem;
    color: var(--color-info);
    font-weight: var(--text-medium);
    min-height: 1.6em;
    text-align: left;
    line-height: 1.4;
}

.status-message.success {
    color: var(--color-success);
}

.status-message.error {
    color: var(--color-error);
    font-weight: var(--text-semibold);
}

.progress-bar-container {
    width: 100%;
    background-color: var(--color-secondary);
    border-radius: 4px;
    margin-top: var(--spacing-unit);
    overflow: hidden;
    height: 12px;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background-color: var(--color-accent);
    transition: width 0.3s ease-out;
    border-radius: 4px;
}

#previewSection {
    margin-top: calc(var(--spacing-unit) * 2);
    padding-top: var(--spacing-unit);
    border-top: 1px solid var(--color-secondary);
    text-align: left;
}

.preview-heading {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-unit);
}

.preview-table-container {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background-color: var(--color-background);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    max-height: 60vh; /* Limite la hauteur à 60% de la hauteur de l'écran */
    overflow-y: auto; /* Ajoute une barre de défilement verticale si nécessaire */
}

.preview-table-container table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.preview-table-container th,
.preview-table-container td {
    padding: calc(var(--spacing-unit) * 0.75) var(--spacing-unit);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
    vertical-align: middle;
}

.preview-table-container th {
    background-color: var(--color-secondary);
    font-weight: var(--text-semibold);
    color: var(--color-primary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.preview-table-container th > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.preview-table-container tr:last-child td {
    border-bottom: none;
}

.preview-table-container tr:nth-child(even) td {
    background-color: #f9fafb;
}

.preview-table-container td.space-highlight {
    background-color: var(--color-highlight);
}

.preview-table-container td.has-special-char {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.special-char-icon {
    margin-left: 0.75rem;
    cursor: help;
    opacity: 0.8;
    font-size: 1.1em;
    user-select: none;
}

.special-char-icon:hover {
    opacity: 1;
}

.artifact-text {
    background-color: var(--color-highlight);
    padding: 0.1em 0.3em;
    border-radius: 4px;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.9em;
}

.info-icon {
    display: inline-block;
    width: 1.1rem;
    height: 1.1rem;
    border-radius: 50%;
    background-color: var(--color-text-secondary);
    color: var(--color-background);
    font-family: serif;
    font-weight: bold;
    font-style: italic;
    text-align: center;
    line-height: 1.1rem;
    font-size: 0.8rem;
    cursor: help;
    flex-shrink: 0;
}

.column-config-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    font-size: 1.1rem;
    color: var(--color-primary-action);
    vertical-align: middle;
    line-height: 1;
    flex-shrink: 0;
}

.column-config-button:hover {
    color: var(--color-primary);
}

.column-config-popover {
    position: absolute;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: var(--spacing-unit);
    z-index: 100;
    min-width: 280px;
    font-size: 0.9rem;
}

.column-config-popover h4 {
    font-size: 1rem;
    color: var(--color-primary);
    margin-top: 0;
    margin-bottom: calc(var(--spacing-unit) * 0.75);
    border-bottom: 1px solid var(--color-secondary);
    padding-bottom: calc(var(--spacing-unit) * 0.5);
}

.column-config-popover ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.column-config-popover li {
    margin-bottom: calc(var(--spacing-unit) * 0.75);
}

.column-config-popover label {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    cursor: pointer;
}

.column-config-popover input[type="checkbox"]:disabled + * {
    color: #aaa;
    cursor: not-allowed;
}

.column-config-popover input[type="checkbox"] {
    margin-right: calc(var(--spacing-unit) * 0.75);
    cursor: pointer;
    transform: scale(1.1);
}

.date-format-options,
.phone-format-options,
.case-options {
    padding-left: calc(var(--spacing-unit) * 1.75);
    margin-top: calc(var(--spacing-unit) * 0.5);
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 0.25);
}

.date-format-options select,
.phone-format-options select,
.case-options select {
    width: 100%;
    padding: calc(var(--spacing-unit) * 0.5);
    border-radius: 4px;
    border: 1px solid var(--color-border);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    background-color: var(--color-background);
}

.result-zone {
    margin-top: calc(var(--spacing-unit) * 2);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.75);
}

.app-footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2) 0;
    border-top: 1px solid var(--color-secondary);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.language-switcher {
    margin-bottom: var(--spacing-unit);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.language-switcher .lang-link {
    text-decoration: none;
    color: var(--color-primary-action);
    font-weight: var(--text-medium);
    padding: 0.25rem;
}

.language-switcher .lang-link:hover,
.language-switcher .lang-link:focus {
    text-decoration: underline;
}

.language-switcher .lang-link.active {
    font-weight: var(--text-bold);
    text-decoration: none;
    color: var(--color-text-main);
    cursor: default;
}

.language-switcher .lang-separator {
    color: var(--color-border);
}

.app-footer nav ul {
    list-style: none;
    padding: 0;
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    display: flex;
    justify-content: center;
    gap: var(--spacing-unit);
}

.app-footer nav a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--text-medium);
}

.app-footer nav a:hover,
.app-footer nav a:focus {
    text-decoration: underline;
    color: #1e2a4a;
}

@media (min-width: 768px) {
    .file-input-controls {
        flex-direction: row;
        justify-content: center;
    }
    .result-zone {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-unit);
    }
}

@media (max-width: 480px) {
    .app-header h1 {
        font-size: 1.8rem;
    }
    .welcome-zone .invitation-message {
        font-size: 1.1rem;
    }
    .button {
        width: 100%;
        padding: calc(var(--spacing-unit) * 0.9) var(--spacing-unit);
        margin-left: 0;
        margin-right: 0;
    }
    #fileSelectedZone .button {
        width: auto;
        margin-top: var(--spacing-unit);
    }
    .file-interaction-section {
        padding: var(--spacing-unit);
    }
    .result-zone {
        gap: var(--spacing-unit);
    }
    .preview-table-container th,
    .preview-table-container td {
        padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.75);
    }
    .column-config-popover {
        min-width: 240px;
        max-width: calc(100vw - 2 * var(--spacing-unit));
    }
}
/* Centrage général des zones de contenu principales */
.file-interaction-section,
#previewSection,
.result-zone {
    text-align: center;
}

/* Centrage du message d'invitation initial */
.invitation-message {
    text-align: center;
}

/* Ajustement pour centrer le message de statut */
.status-zone .status-message {
    text-align: center;
}

/* Assure le centrage des éléments dans les contrôles de sélection de fichier */
.file-input-controls {
    justify-content: center;
}

/* Centrage du texte dans la zone de fichier sélectionné */
.file-selected-zone p {
    text-align: center;
}

/* Centrage des boutons d'action (Appliquer, Télécharger, Annuler, Nettoyer un autre fichier) */
.action-buttons-zone {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-unit);
}

/* Centrage du message de sécurité */
.security-message {
    text-align: center;
}

/* Ajustement pour le contenu des en-têtes de colonne dans le tableau de prévisualisation */
.preview-table-container th > div {
    justify-content: center;
    text-align: center;
}

/* Pour s'assurer que le texte de l'en-tête du popover est bien centré */
.column-config-popover h4 {
    text-align: center;
}

/* Styles pour la pagination */
.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.5);
    margin-top: calc(var(--spacing-unit) * 1.5);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    flex-wrap: wrap;
}

.pagination-controls .button {
    min-width: unset;
    padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 1);
}

.pagination-controls .button:disabled {
    background-color: var(--color-secondary);
    color: var(--color-text-secondary);
    border-color: var(--color-border);
    cursor: not-allowed;
}

.pagination-controls .page-info {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: var(--text-medium);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.pagination-controls .page-input {
    width: 60px;
    padding: calc(var(--spacing-unit) * 0.5);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    text-align: center;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--color-text-main);
}

.pagination-controls .page-input:focus {
    outline: 2px solid var(--color-primary-action);
    outline-offset: 1px;
}

@media (max-width: 480px) {
    .pagination-controls {
        flex-direction: row;
        gap: calc(var(--spacing-unit) * 0.25);
    }
    .pagination-controls .button {
        padding: calc(var(--spacing-unit) * 0.4) calc(var(--spacing-unit) * 0.8);
    }
    .pagination-controls .page-info {
        font-size: 0.9rem;
    }
    .pagination-controls .page-input {
        width: 50px;
        padding: calc(var(--spacing-unit) * 0.4);
        font-size: 0.85rem;
    }
}

#previewSection {
    text-align: center;
}

#previewSection .action-buttons-zone {
    justify-content: center;
}

/* --- Section d'information dépliable (ACCORDÉON) --- */
.intro-section {
    padding: 0;
    margin-top: calc(var(--spacing-unit) * 2.5);
    border-top: none;
}

.intro-section details {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background-color: #fcfdff;
}

.intro-section summary {
    padding: var(--spacing-unit);
    font-size: 1.5rem;
    font-weight: var(--text-medium);
    color: var(--color-primary);
    cursor: pointer;
    list-style: none;
    outline-offset: 3px;
    text-align: center;
}

.intro-section summary::-webkit-details-marker {
    display: none;
}

.intro-section details[open] > summary {
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-secondary);
}

.details-content {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
}

.details-content .how-it-works,
.details-content .transformations-showcase {
    margin-bottom: 0;
}

.details-content .how-it-works {
     margin-bottom: calc(var(--spacing-unit) * 2);
}

.details-content h2 {
    font-size: 1.5rem;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    font-weight: var(--text-medium);
}

.details-content .steps-container {
    display: flex;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 2);
    text-align: center;
}

.details-content .step {
    flex: 1;
    padding: 1.5rem;
    border-radius: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border);
    background-color: var(--color-background); /* Fond blanc simple */
}

.details-content .step:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.07);
}

.details-content .step-number {
    width: 35px;
    height: 35px;
    background-color: var(--color-accent);
    color: var(--color-background);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: var(--text-bold);
    margin: 0 auto calc(var(--spacing-unit) * 1);
}

.details-content .step h3 {
    font-size: 1.2rem; /* Ajustement de la taille pour l'harmonie */
    color: var(--color-text-main); /* CORRECTION : Texte principal pour lisibilité */
    font-weight: var(--text-semibold);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.details-content .step p {
    font-size: 0.9rem;
    color: var(--color-text-secondary); /* CORRECTION : Texte secondaire pour lisibilité */
    line-height: 1.5;
    flex-grow: 1;
}
/* --- FIN DE LA MODIFICATION --- */

.details-content .transformations-showcase ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 0.75);
}

.details-content .showcase-columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: calc(var(--spacing-unit) * 2);
    align-items: start; /* On garde l'alignement par sécurité */
}

.details-content .transformations-showcase li {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.details-content .transformations-showcase li strong {
    color: var(--color-text-main);
    font-weight: var(--text-medium);
}

@media (max-width: 768px) {
    .details-content .steps-container {
        flex-direction: column;
        gap: var(--spacing-unit);
    }
    .details-content .transformations-showcase ul {
        grid-template-columns: 1fr;
    }
    .details-content .showcase-columns {
        grid-template-columns: 1fr;
    }
}
/* Style pour le bandeau d'instruction de configuration */
#configInstructionBanner {
    padding: var(--spacing-unit);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    background-color: #eef7ff; /* Un bleu très clair et doux */
    border: 1px solid #bde0ff;
    border-radius: 6px;
    color: var(--color-primary);
    font-weight: var(--text-medium);
    text-align: center;
    transition: all 0.3s ease-in-out;
}

.sheet-selector-zone {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    background-color: #eef7ff;
    padding: var(--spacing-unit);
    border-radius: 8px;
    border: 1px solid #bde0ff;
}

.sheet-selector-zone label {
    font-weight: var(--text-medium);
    color: var(--color-primary);
}

.sheet-select-dropdown {
    padding: calc(var(--spacing-unit) * 0.5);
    border-radius: 6px;
    border: 1px solid var(--color-border);
    min-width: 200px;
    font-family: var(--font-primary);
    font-size: 0.9rem;
}

@keyframes plasma-flow {
  0% {
    background-position: 0% 0%;
  }
  50% {
    background-position: 100% 100%;
  }
  100% {
    background-position: 0% 0%;
  }
}