/* =====================================================================
   /maths/calcul/soustraction/fiches/fiches.css
   Aperçu fidèle au PDF + entiers et décimaux
   ===================================================================== */

.soustraction-fiches .soustraction-fiches-panel {
    position: sticky;
    top: 1rem;
}

.soustraction-fiches-preview {
    min-height: 360px;
}

/* ---------------------------------------------------------------------
   APERÇU A4
   --------------------------------------------------------------------- */

.soustraction-fiches-preview-viewport {
    width: 100%;
    overflow-x: auto;
    padding: 0.25rem 0 0.5rem;
}

.soustraction-fiches-preview-sheet {
    width: min(100%, 820px);
    min-width: 690px;
    aspect-ratio: 210 / 297;
    margin: 0 auto;
    padding: 14px 14px 12px;
    box-sizing: border-box;

    display: flex;
    flex-direction: column;

    border: 1px solid #d6dbe3;
    border-radius: 0.45rem;
    background: #fff;
    box-shadow: 0 0.2rem 0.8rem rgba(0, 0, 0, 0.06);
}

.soustraction-fiches-preview-title {
    text-align: center;
    font-weight: 700;
    font-size: 1.55rem;
    color: #2f4f90;
    line-height: 1.05;
}

.soustraction-fiches-preview-subtitle {
    text-align: center;
    color: #6c757d;
    font-size: 0.8rem;
    line-height: 1.1;
    margin-top: 0.25rem;
    margin-bottom: 0.75rem;
}

.soustraction-fiches-preview-name-line {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.78rem;
    line-height: 1;
    margin-bottom: 0.65rem;
    white-space: nowrap;
}

.soustraction-fiches-preview-meta-row {
    display: grid;
    align-items: stretch;
    margin-bottom: 0.7rem;
    border: 1px solid #d6dbe3;
    background: #f8f9fb;
}

.soustraction-fiches-preview-meta-row.meta-4 {
    grid-template-columns: 0.9fr 1.5fr 1.15fr 1.15fr;
}

.soustraction-fiches-preview-meta-row.meta-5 {
    grid-template-columns: 0.85fr 1.2fr 1.55fr 1.15fr 1.15fr;
}

.soustraction-fiches-preview-meta-row.meta-6 {
    grid-template-columns: 0.72fr 0.65fr 1.28fr 1.55fr 1.15fr 1.18fr;
}

.soustraction-fiches-preview-meta-row > span {
    min-width: 0;
    padding: 0.38rem 0.3rem;
    color: #344767;
    font-size: 0.67rem;
    line-height: 1.1;
    text-align: center;
    white-space: nowrap;
}


.soustraction-fiches-preview-meta-row.meta-6 > span {
    white-space: normal;
}

.soustraction-fiches-preview-grid {
    flex: 1 1 auto;
    min-height: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
}

.soustraction-fiches-preview-grid.rows-3 {
    grid-template-rows: repeat(3, minmax(0, 1fr));
}

.soustraction-fiches-preview-grid.rows-4 {
    grid-template-rows: repeat(4, minmax(0, 1fr));
}

.soustraction-fiches-preview-grid.rows-5 {
    grid-template-rows: repeat(5, minmax(0, 1fr));
}

.soustraction-fiches-preview-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding-top: 0.6rem;
    color: #6c757d;
    font-size: 0.62rem;
    line-height: 1;
}

/* ---------------------------------------------------------------------
   CARTES
   --------------------------------------------------------------------- */

.soustraction-fiches-operation {
    min-width: 0;
    min-height: 0;
    height: 100%;
    box-sizing: border-box;
    overflow: hidden;

    border: 1px solid #ced4da;
    border-radius: 0.45rem;
    background: #fff;
    padding: 0.55rem;

    display: flex;
    flex-direction: column;
}

.soustraction-fiches-operation-number {
    font-size: 0.67rem;
    line-height: 1;
    font-weight: 700;
    color: #778394;
    margin-bottom: 0.3rem;
}

/* Opérations déjà posées */
.soustraction-fiches-vertical {
    margin: auto;
    min-width: 5.6rem;
    font-family: "Courier New", monospace;
    font-size: 1rem;
    line-height: 1.02;
    text-align: right;
}

.soustraction-fiches-vertical .sf-term-row {
    white-space: nowrap;
}

.soustraction-fiches-vertical .sf-number-pre {
    display: inline-block;
    white-space: pre;
    font: inherit;
    letter-spacing: 0;
}

.soustraction-fiches-vertical.has-decimals {
    min-width: 7.2rem;
    font-size: 0.92rem;
}

.soustraction-fiches-vertical .sf-last-term {
    display: grid;
    grid-template-columns: 1.1em 1fr;
    column-gap: 0.2rem;
}

.soustraction-fiches-vertical .sf-line {
    border-top: 2px solid #212529;
    margin-top: 0.15rem;
    height: 0.8em;
}

/* Opérations à poser */
.soustraction-fiches-operation--to-pose {
    padding: 0.48rem 0.5rem 0.5rem;
}

.soustraction-fiches-to-pose {
    display: flex;
    flex: 1 1 auto;
    min-height: 0;
    flex-direction: column;
    margin: 0;
}

.soustraction-fiches-to-pose-head {
    display: block;
    flex: 0 0 auto;
    min-height: 2rem;
    margin-bottom: 0.25rem;
}

.soustraction-fiches-to-pose-head .soustraction-fiches-operation-number {
    margin-bottom: 0.12rem;
}

.soustraction-fiches-expression {
    min-width: 0;
    font-size: 0.68rem;
    line-height: 1.03;
    font-weight: 700;
    text-align: left;
    overflow-wrap: anywhere;
}

.soustraction-fiches-expression.has-decimals {
    font-size: 0.62rem;
    line-height: 1.02;
}

/*
 * Le quadrillage de l'aperçu reproduit la géométrie du PDF :
 * 12 colonnes et un nombre de lignes fourni par JS.
 * L'aspect-ratio garantit des carreaux réellement carrés quelle que soit
 * la largeur d'affichage de la miniature.
 */
.soustraction-fiches-pose-zone {
    --sf-pose-rows: 7;

    width: 100%;
    flex: 0 0 auto;
    box-sizing: border-box;
    margin-top: 0.1rem;

    border: 1px solid #dfe4ea;
    background-color: #fff;
    background-image:
        linear-gradient(to right, #dfe4ea 1px, transparent 1px),
        linear-gradient(to bottom, #dfe4ea 1px, transparent 1px);
    background-size:
        calc(100% / 12) calc(100% / var(--sf-pose-rows)),
        calc(100% / 12) calc(100% / var(--sf-pose-rows));
    background-position: -1px -1px;
}

/* ---------------------------------------------------------------------
   RESPONSIVE
   L'aperçu reste volontairement une miniature A4 en 3 colonnes.
   Sur un écran étroit, on le fait défiler horizontalement plutôt que de
   transformer sa géométrie, afin qu'il continue de refléter le PDF.
   --------------------------------------------------------------------- */

@media (max-width: 991.98px) {
    .soustraction-fiches .soustraction-fiches-panel {
        position: static;
    }
}

/* ---------------------------------------------------------------------
   APERÇU CORRIGÉ / BASCULE DE VUE
   --------------------------------------------------------------------- */

#sfPreviewSwitch .btn.active {
    color: #fff;
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.soustraction-fiches-preview-correction-note {
    margin-bottom: 0.65rem;
    color: #198754;
    font-size: 0.72rem;
    line-height: 1.1;
    font-weight: 700;
}

.soustraction-fiches-preview-grid.cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.soustraction-fiches-preview-grid.cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.soustraction-fiches-preview-grid.rows-6 {
    grid-template-rows: repeat(6, minmax(0, 1fr));
}

.soustraction-fiches-preview-sheet.is-correction .soustraction-fiches-operation {
    padding: 0.42rem 0.5rem;
}

.soustraction-fiches-operation--correction .soustraction-fiches-operation-number {
    margin-bottom: 0.12rem;
}

.sf-correction-operation {
    margin: auto;
    font-family: "Courier New", monospace;
    font-size: 0.95rem;
    line-height: 1;
}

.soustraction-fiches-preview-grid.cols-2 .sf-correction-operation {
    font-size: 1.05rem;
}

.soustraction-fiches-preview-grid.rows-6 .sf-correction-operation {
    font-size: 0.84rem;
}

.sf-correction-row {
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    min-height: 1.25em;
    white-space: nowrap;
}

.sf-correction-sign {
    display: inline-block;
    width: 1.05em;
    flex: 0 0 1.05em;
    text-align: center;
    font-weight: 700;
}

.sf-correction-digits {
    display: inline-flex;
    align-items: flex-end;
    white-space: nowrap;
}

.sf-correction-digit-slot {
    position: relative;
    display: inline-flex;
    justify-content: center;
    align-items: flex-end;
    width: 0.92em;
    min-width: 0.92em;
    height: 1.2em;
    overflow: visible;
}

.sf-correction-digit-value {
    display: inline-block;
    width: 100%;
    text-align: center;
}

.sf-correction-comma {
    display: inline-block;
    width: 0.38em;
    text-align: center;
}

.sf-correction-marker {
    position: absolute;
    left: -0.38em;
    bottom: -0.02em;
    font-family: Arial, sans-serif;
    font-size: 0.48em;
    line-height: 1;
    font-weight: 700;
    z-index: 2;
}

.sf-correction-marker.sf-marker-top {
    color: #d94a3a;
}

.sf-correction-marker.sf-marker-bottom {
    color: #1682a8;
    left: -0.58em;
    font-size: 0.43em;
}

.sf-correction-result-row {
    margin-top: 0.12em;
    padding-top: 0.16em;
    border-top: 2px solid #263238;
    color: #198754;
    font-weight: 700;
}

.sf-zero-inutile {
    color: #adb5bd;
    font-weight: normal;
}