:root {
    --card-width: 93mm;
    --card-height: 65mm;
    --primary-color: #007bff;
}

body {
    display: flex;
    flex-direction: column;
    height: 100vh;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f4f9;
}

#toolbar {
    background: #333;
    color: white;
    padding: 10px;
    display: flex;
    gap: 10px;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

#toolbar button {
    background: #555;
    color: white;
    border: none;
    padding: 8px 15px;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.3s;
}

#about-btn {
    margin-left: auto;
    /* Aligne le bouton ? à droite de la toolbar */
    font-weight: bold;
    background: #666 !important;
}

#about-btn:hover {
    background: #888 !important;
}

/* Modal Styling */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(3px);
}

.modal-content {
    background-color: white;
    padding: 30px;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    position: relative;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    line-height: 1.6;
}

.modal-content-excalidraw {
    background-color: white;
    padding: 40px 20px 20px 20px;
    border-radius: 12px;
    width: 95%;
    height: 95%;
    position: relative;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
}

#excalidraw-container {
    flex-grow: 1;
    border: 1px solid #ccc;
    margin-bottom: 10px;
}

.excalidraw-actions {
    display: flex;
    justify-content: center;
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
}

.close-modal:hover {
    color: #333;
}

.source-link {
    display: inline-block;
    margin-top: 15px;
    background: var(--primary-color);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    transition: background 0.3s;
}

.source-link:hover {
    background: #0056b3;
}

.modal hr {
    border: 0;
    border-top: 1px solid #eee;
    margin: 20px 0;
}

#toolbar button:hover {
    background: #777;
}

#toolbar button.active {
    background: var(--primary-color);
}

#main-container {
    flex-grow: 1;
    display: flex;
    overflow: hidden;
}

.view-section {
    width: 100%;
    height: 100%;
    display: flex;
    box-sizing: border-box;
}

.hidden {
    display: none !important;
}

/* Editor Section */
#editor-container {
    padding: 20px;
    flex-direction: column;
}

#editor-toolbar {
    background: #eee;
    padding: 10px;
    border: 1px solid #ccc;
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    display: flex;
    gap: 10px;
}

#editor-toolbar button {
    background: white;
    border: 1px solid #bbb;
    padding: 5px 12px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 5px;
}

#editor-toolbar button:hover {
    background: #fdfdfd;
    border-color: #999;
}

#markdown-input {
    width: 100%;
    height: 100%;
    padding: 15px;
    font-family: monospace;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 0 0 4px 4px;
    resize: none;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
}

#markdown-input.dragover {
    border: 2px dashed var(--primary-color);
    background: #eef7ff;
}

/* Preview Section (Grid) */
#preview-container {
    padding: 20px;
    overflow-y: auto;
    background: #eee;
    display: flex;
    flex-direction: column;
    /* On empile les pages verticalement */
    align-items: center;
    /* On centre les pages à l'écran */
    gap: 40px;
    /* Espace entre chaque "page" */
}

.grid-wrapper {
    width: 100%;
    max-width: 210mm;
    /* Largeur d'une page A4 pour un aperçu réaliste */
}

.grid-wrapper h3 {
    text-align: center;
    color: #333;
    margin-bottom: 10px;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    /* 2 colonnes comme à l'impression ! */
    grid-auto-rows: var(--card-height);
    gap: 10px;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    /* Joli effet "feuille de papier" */
}

#revision-container {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}




#revision-card-wrapper {
    perspective: 1000px;

    /* On définit la largeur maximale souhaitée */
    width: 90%;
    max-width: 900px;

    /* On impose le ratio (Largeur / Hauteur) */
    aspect-ratio: 900 / 600;

    /* Centrage et espacement */
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 20px;
    user-select: none;
}

.card-flip-container {
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.card-flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.card-flip-container.flipped .card-flip-inner {
    transform: rotateY(180deg);
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    border-radius: 12px;
    border: 2px solid #ccc;
    background: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.card-back {
    transform: rotateY(180deg);
}

#leitner-controls {
    display: none;
    /* Masqué par défaut */
    flex-direction: row;
    /* Forcer la ligne */
    gap: 20px;
    align-items: center;
    justify-content: center;
    background: white;
    padding: 10px 20px;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-top: 10px;
}


#leitner-selector {
    padding: 15px 25px;
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    font-weight: 500;
}

#leitner-selector label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 8px;
    transition: background 0.2s;
}

#leitner-selector label:hover {
    background: #f0f4f8;
}

#leitner-selector input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

#start-session-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#start-session-btn:hover {
    background: #0056b3;
    transform: translateY(-1px);
}



#leitner-controls button {
    border: none;
    background: #eee;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
}

#leitner-controls button:hover {
    background: #ddd;
}

#revision-controls {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 30px;
    align-items: center;
    background: white;
    padding: 15px 30px;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

#revision-controls button {
    background: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#revision-controls button:hover {
    transform: scale(1.1);
    background: #0056b3;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

#revision-controls button:active {
    transform: scale(0.95);
}

#shuffle-btn.active {
    background: #28a745;
    /* Vert pour indiquer que le mélange est actif */
    box-shadow: 0 0 10px rgba(40, 167, 69, 0.5);
}

#card-counter {
    font-weight: bold;
    font-size: 1.2em;
    color: #555;
    min-width: 80px;
    text-align: center;
}

/* Card Styling (shared between Grid and Revision) */
.card {
    position: relative;
    background: #f0f1f5;
    border: 1.5pt solid #8c8f9f;
    border-radius: 8px;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 5px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    width: 100%;
    height: 100%;
}

.card-content {
    background: white;
    color: #333;
    /* Force dark text on white background */
    padding: 10px;
    border-radius: 6px;
    width: 94%;
    height: 94%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    overflow: hidden;
    /*word-break: break-word;*/
    word-break: normal;
    object-fit: contain;
}

.card-content h1,
.card-content h2,
.card-content h3,
.card-content h4,
.card-content h5,
.card-content h6,
.card-content p {
    margin: 0.1em 0;
    height: 100%;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Force LaTeX and math to stay on a single line */
.katex-display,
.katex {
    white-space: nowrap !important;
}

/* Ensure math containers don't break lines */
.card-content .katex-display {
    margin: 0.2em 0 !important;
    width: 100%;
    overflow: visible;
}

/* Colors from FlashMD - More pronounced versions */
.card.fond-bleu {
    background-color: #2196f3;
    color: white;
}

.card.fond-bleu .card-content {
    border: 2px solid #1976d2;
}

.card.fond-rouge {
    background-color: #f44336;
    color: white;
}

.card.fond-rouge .card-content {
    border: 2px solid #d32f2f;
}

.card.fond-vert {
    background-color: #4caf50;
    color: white;
}

.card.fond-vert .card-content {
    border: 2px solid #388e3c;
}

.card.fond-jaune {
    background-color: #ffeb3b;
    color: #333;
}

.card.fond-jaune .card-content {
    border: 2px solid #fbc02d;
}

.card.fond-orange {
    background-color: #ff9800;
    color: white;
}

.card.fond-orange .card-content {
    border: 2px solid #f57c00;
}

.card.fond-violet {
    background-color: #9c27b0;
    color: white;
}

.card.fond-violet .card-content {
    border: 2px solid #7b1fa2;
}

.card.fond-gris {
    background-color: #757575;
    color: white;
}

.card.fond-gris .card-content {
    border: 2px solid #616161;
}

/* Labels */
.card-label {
    position: absolute;
    font-size: 0.5em;
    font-weight: bold;
    background: white;
    color: #333;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1.5pt solid #333;
    max-width: 45%;
    z-index: 0;
    box-shadow: 1px 1px 0px rgba(0, 0, 0, 0.2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    /* Empêche de voir l'étiquette à travers ou à l'envers lors du flip */
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

#revision-container .card-label {
    font-size: 0.8em;
}

.label-bottom-right {
    bottom: 4px;
    right: 4px;
}

#revision-container .label-bottom-right {
    bottom: 8px;
    right: 8px;
}

.label-top-left {
    top: 4px;
    left: 4px;
}

#revision-container .label-top-left {
    top: 8px;
    left: 8px;
}

@media print {

    body,
    html,
    #main-container,
    .view-section,
    #preview-container {
        height: auto !important;
        overflow: visible !important;
        display: block !important;
        /* Retire le flexbox qui peut perturber l'impression */
        background-color: white !important;
        background-image: none !important;
        color: black !important;
    }

    @page {
        size: A4;
        margin: 10mm;
    }

    #toolbar,
    #editor-container,
    #revision-container,
    h3,
    #screen-grid-wrapper {
        display: none !important;
    }

    #preview-container,
    #print-grid-wrapper {
        display: block !important;
        visibility: visible !important;
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    #print-grid-wrapper .print-page {
        display: grid !important;
        grid-template-columns: repeat(2, 90mm) !important;
        grid-auto-rows: 60mm !important;
        gap: 10mm !important;
        width: 190mm !important;
        margin: 0 auto !important;
        padding: 0 !important;
        page-break-after: always !important;
        break-after: page !important;
        float: none !important;
    }

    .card {
        width: 90mm !important;
        height: 60mm !important;
        margin: 0 !important;
        box-shadow: none !important;
        border: 1pt solid #000 !important;
        page-break-inside: avoid !important;
        break-inside: avoid !important;
    }

    /* We don't need nth-child page break here if every grid is one page */
}