.cb-card {
    background: var(--mc-tool-surface);
    border: 1px solid var(--mc-tool-border);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    position: relative;
}

.preview-grid {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .preview-grid {
        grid-template-columns: 1fr;
    }
}

.settings-panel {
    display: flex;
    flex-direction: column;
}

/* --- Aperçu graph --- */

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.jxgbox {
    width: 100%;
    border: 1px solid var(--mc-tool-border-strong);
    border-radius: 0.5rem;
    background-color: var(--mc-tool-surface-alt);
    cursor: grab;
}

.jxgbox:active {
    cursor: grabbing;
}

.jxgbox-landscape {
    aspect-ratio: 4/3;
}

.jxgbox-square {
    aspect-ratio: 1/1;
}

/* --- Formulaire réglages --- */

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.8rem;
    color: var(--mc-tool-text);
}

.form-group input[type="number"] {
    width: 100%;
    padding: 0.4rem 0.5rem;
    border: 1px solid var(--mc-tool-border-strong);
    border-radius: 0.375rem;
    font-size: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

/* --- Lignes de fonctions --- */

.func-row {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    background: var(--mc-tool-surface-muted);
    border-radius: 0.375rem;
}

.func-row-main {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.func-name-input {
    width: 2.2rem;
    padding: 0.25rem;
    border: 1px solid var(--mc-tool-border-strong);
    border-radius: 0.25rem;
    font-size: 0.85rem;
    font-style: italic;
    text-align: center;
    background: var(--mc-tool-surface);
}

.func-label {
    font-size: 0.85rem;
    color: var(--mc-tool-text-soft);
    white-space: nowrap;
}

.func-rendered {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    padding: 0.35rem 0.5rem;
    background: var(--mc-tool-surface);
    border: 1px solid var(--mc-tool-border-strong);
    border-radius: 0.25rem;
    cursor: text;
    display: flex;
    align-items: center;
    min-height: 36px;
}

.func-controls {
    display: flex;
    gap: 0.35rem;
    align-items: center;
    flex-wrap: wrap;
}

.func-controls input[type="color"] {
    width: 30px;
    height: 30px;
    padding: 1px;
    border: 1px solid var(--mc-tool-border-strong);
    border-radius: 0.25rem;
    cursor: pointer;
    background: none;
}

.func-controls select {
    padding: 0.25rem 0.3rem;
    border: 1px solid var(--mc-tool-border-strong);
    border-radius: 0.25rem;
    font-size: 0.8rem;
    background: var(--mc-tool-surface);
    color: var(--mc-tool-text);
    cursor: pointer;
    height: 30px;
}

/* --- Boutons icône --- */

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 0.25rem;
    border: 1px solid var(--mc-tool-border-strong);
    background: var(--mc-tool-surface);
    color: var(--mc-tool-text-strong);
    cursor: pointer;
    transition: all 0.15s;
}

.btn-icon:hover {
    background: var(--mc-tool-surface-muted);
}

.btn-icon-off {
    color: var(--mc-tool-text-muted);
    background: var(--mc-tool-surface-muted);
}

.btn-remove {
    background: var(--mc-tool-danger);
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    flex-shrink: 0;
}

.btn-remove:hover {
    background: var(--mc-tool-danger-strong);
}

/* --- Bouton ajouter --- */

.add-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.5rem;
    background: var(--mc-tool-border);
    border: 1px dashed var(--mc-tool-text-muted);
    border-radius: 0.375rem;
    color: var(--mc-tool-text-strong);
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s;
}

.add-btn:hover {
    background: var(--mc-tool-border-strong);
    border-style: solid;
}

/* --- Toast --- */

.cb-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(1rem);
    background: var(--mc-tool-text-dark);
    color: white;
    padding: 0.6rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 9999;
    pointer-events: none;
}

.cb-toast-show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* --- Mode sombre — exceptions spécifiques au constructeur de courbes --- */

/* La planche JSXGraph dessine ses axes/courbes avec des traits sombres : on la
   garde sur fond clair (le remap sombre de --mc-tool-surface-alt la rendrait
   illisible). */
body.mode-sombre .jsxgbox {
    background-color: #f8fafc !important;
}

/* .cb-toast utilise --mc-tool-text-dark comme fond (sombre en clair) : ce token
   redevient clair en mode sombre, rendant le texte blanc illisible. On rétablit
   un fond contrasté. */
body.mode-sombre .cb-toast {
    background: var(--mc-tool-surface-muted);
    color: var(--mc-tool-text);
    border: 1px solid var(--mc-tool-border);
}

/* Texte des champs de saisie (le thème ne style pas les inputs génériques) ;
   les cases à cocher et le sélecteur de couleur gardent leur rendu natif. */
body.mode-sombre .cb-card input:not([type="checkbox"]):not([type="color"]),
body.mode-sombre #tikz-output {
    color: var(--mc-tool-text);
}