/*
 * CEI Interactive Exercises - Stylesheet v2.0.0
 */

/* --- Estilos Generales del Bloque --- */
.cei-exercise {
    border: 1px solid #EEEEEE;
    border-inline-start: 5px solid #8A2976;
    padding: 1.5em;
    margin-bottom: 2em;
    border-radius: 5px;
}

.cei-exercise__header {
    margin-bottom: 1em;
}

.cei-exercise__title {}

.cei-exercise__instructions {
    font-size: 0.9em;
    font-style: italic;
}

.cei-exercise__actions {
    margin-top: 1.5em;
}

.cei-exercise__check-btn {
    display: inline-block;
    background-color: #1895BD;
    color: #FFFFFF;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    line-height: 1.2;
    transition: background-color 0.2s ease;
    white-space: normal;
    text-align: center;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.cei-exercise__check-btn:hover {
    background-color: #1FA7A2;
}

.cei-exercise__feedback {
    margin-top: 1em;
    padding: 0.8em;
    border-radius: 4px;
    font-weight: bold;
    display: none;
}

.cei-exercise__feedback--correct {
    display: block;
    background-color: #d4edda;
    color: #155724;
}

.cei-exercise__feedback--incorrect {
    display: block;
    background-color: #f8d7da;
    color: #721c24;
}

.cei-exercise__feedback--warning {
    display: block;
    background-color: #fff3cd;
    color: #856404;
}

/* --- Estilos para otros tipos de ejercicios --- */
.cei-exercise__option {
    border: 1px solid #EEEEEE;
    padding: 10px;
    margin-bottom: 5px;
    border-radius: 3px;
    cursor: pointer;
    background-color: #FFFFFF;
    transition: background-color 0.2s, border-color 0.2s;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.cei-exercise__option.is-selected {
    border-color: #1895BD;
    background-color: #E8F4F8;
}

.cei-exercise__blank-input {
    border: 1px solid #EEEEEE;
    border-bottom: 2px solid #1895BD;
    padding: 8px;
    border-radius: 3px;
    inline-size: min(100%, 12rem);
}

.cei-exercise__sentence-area,
.cei-exercise__word-bank {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px;
    border-radius: 5px;
    min-height: 45px;
}

.cei-exercise__sentence-area {
    background-color: #FFFFFF;
    border: 1px solid #EEEEEE;
    margin-bottom: 15px;
}

.cei-exercise__word-bank {
    background-color: transparent;
}

.cei-exercise__word {
    padding: 8px 12px;
    border: 1px solid #EEEEEE;
    background-color: #a4829d;
    border-bottom-width: 3px;
    border-radius: 5px;
    cursor: pointer;
    user-select: none;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.cei-exercise__match-container {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.cei-exercise__match-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.cei-exercise__match-item {
    padding: 12px;
    border: 1px solid #EEEEEE;
    border-radius: 5px;
    cursor: pointer;
    background-color: #FFFFFF;
    transition: all 0.2s;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.cei-exercise__match-item.is-selected {
    border-color: #1895BD;
    background-color: #E8F4F8;
    transform: scale(1.03);
}

.cei-exercise__match-item.is-matched {
    background-color: #d4edda;
    border-color: #155724;
    cursor: default;
    opacity: 0.7;
}

.cei-exercise__dialogue-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.cei-exercise__dialogue-line {
    padding: 12px;
    background-color: #FFFFFF;
    border: 1px solid #EEEEEE;
    border-radius: 8px;
    cursor: grab;
    user-select: none;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

/* --- [NUEVO] Estilos para el feedback de dialogue-scramble --- */
.cei-exercise__dialogue-line.is-incorrect {
    border-color: #721c24; /* Rojo oscuro */
    background-color: #f8d7da; /* Rojo claro */
}

.cei-exercise__dialogue-line.is-dragging {
    opacity: 0.95; /* Casi opaco, solo un toque de transparencia */
    background-color: #FFFFFF; /* Fondo blanco para que destaque el borde */
    border: 2px solid #1895BD; /* Un borde azul más grueso */
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2); /* Sombra para dar efecto de profundidad */
    cursor: grabbing;
}

.cei-exercise__deck-container {
    display: grid;
    perspective: 1000px;
    min-height: initial;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

@media (min-width: 768px) {
    .cei-exercise__deck-container {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

@media (min-width: 1024px) {
    .cei-exercise__deck-container {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

.cei-exercise__card {
    position: relative;
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    cursor: pointer;
}

.cei-exercise__card.is-flipped {
    transform: rotateY(180deg);
}

/* --- CÓDIGO CORREGIDO Y ADAPTABLE --- */
.cei-exercise__card-front,
.cei-exercise__card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;

    /* Control de desbordamiento de texto */
    overflow-wrap: break-word;
    overflow-y: auto;

    /* Tamaño de fuente base para móviles */
    font-size: 0.9em;
    line-height: 1.2;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

/* Aumentamos el tamaño de la fuente para pantallas más grandes */
@media (min-width: 768px) {
    .cei-exercise__card-front,
    .cei-exercise__card-back {
        font-size: 1.4em;
    }
}

/* --- [INICIO] NUEVAS CLASES PARA AJUSTAR LA FUENTE DINÁMICAMENTE --- */
/*
 * Estas clases son añadidas por JavaScript cuando el texto de una tarjeta
 * es demasiado largo, para evitar que aparezca una barra de scroll.
 */

/* Para texto medianamente largo en la parte trasera */
.cei-exercise__card-back.font-size-medium {
    font-size: 1.2em;
}

/* Para texto muy largo en la parte trasera */
.cei-exercise__card-back.font-size-small {
    font-size: 1em;
    line-height: 1.15;
}

/* Ajustes específicos para pantallas pequeñas (móviles) */
@media (max-width: 767px) {
    .cei-exercise__card-back.font-size-medium {
        font-size: 0.7em;
        line-height: 1.15;
    }

    .cei-exercise__card-back.font-size-small {
        font-size: 0.6em;
        line-height: 1.15;
    }
}
/* --- [FIN] DE LAS NUEVAS CLASES --- */

.cei-exercise__card-front {
    border: 1px solid #2a6174;
    background: linear-gradient(315deg, #2f6576 0%, #3d7f95 50%, #4ea9bf 100%);
    color: #FFFFFF;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
}

.cei-exercise__card-back {
    border: 1px solid #e0e0e0;
    background: linear-gradient(to bottom, #f8f9fa, #e9ecef);
    color: #212529;
    transform: rotateY(180deg);
}

.cei-exercise__card:hover .cei-exercise__card-front {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.cei-exercise__card:hover .cei-exercise__card-back {
    transform: rotateY(180deg) translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.cei-exercise__progress {
    text-align: center;
    margin-top: 10px;
    font-size: 0.9em;
    color: #777;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

/* --- Dialogue Choice (Chat Interactivo) --- */
.cei-exercise[data-exercise-type="dialogue-choice"] {
    max-height: min(700px, 80vh);
    padding: 0;
    background: #FFFFFF;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border: 1px solid #EEEEEE;
}

.cei-exercise[data-exercise-type="dialogue-choice"] .cei-exercise__header {
    padding: 1.5em;
    padding-bottom: 1em;
    border-bottom: 1px solid #EEEEEE;
    background: #FFFFFF;
}

.cei-exercise__chat-history {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
}

.cei-exercise__chat-message {
    padding: 10px 15px;
    border-radius: 18px;
    margin-bottom: 12px;
    max-width: 80%;
    line-height: 1.4;
    animation: cei-fadeIn 0.3s ease-out;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.cei-exercise__chat-message--system {
    background-color: #EEEEEE;
    margin-inline-end: auto;
    text-align: start;
    border-end-start-radius: 4px;
}

.cei-exercise__chat-message--user {
    background-color: #1895BD;
    color: #FFFFFF;
    margin-inline-start: auto;
    text-align: start;
    border-end-end-radius: 4px;
}

.cei-exercise__options-area {
    padding: 15px;
    border-top: 1px solid #EEEEEE;
    background: #FFFFFF;
}

/* --- [CAMBIO CLAVE] Estilos de las Opciones --- */
.cei-exercise[data-exercise-type="dialogue-choice"] .cei-exercise__option {
    opacity: 1;
    background-color: #356a7d;
    color: #FFFFFF;
    border: 1px solid #356a7d;
    padding: 12px 15px;
    margin: 5px 0;
    border-radius: 8px;
    display: block;
    width: 100%;
    text-align: start;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.cei-exercise[data-exercise-type="dialogue-choice"] .cei-exercise__option:hover {
    background-color: #1895BD;
    border-color: #1895BD;
    color: #FFFFFF;
}

/* --- ANIMACIÓN SHAKE --- */
.cei-exercise[data-exercise-type="dialogue-choice"] .cei-exercise__option--wrong {
    animation: cei-shake 0.5s;
    border-color: #dc3545;
}

/* --- Keyframes de Animaciones --- */
@keyframes cei-fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes cei-shake {
    0%, 100% {
        transform: translateX(0);
    }
    20%, 60% {
        transform: translateX(-5px);
    }
    40%, 80% {
        transform: translateX(5px);
    }
}