/* Ejercicios de completar frases (preposiciones) */

.exercise {
    max-width: calc(820px + 40px);
}

.question-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: pregunta;
}

.question {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    counter-increment: pregunta;
    transition: border-color 0.25s, box-shadow 0.25s, background-color 0.25s;
    animation: rise 0.45s var(--ease) backwards;
    animation-delay: calc(var(--i, 0) * 40ms);
}

.question::before {
    content: counter(pregunta);
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    margin-top: 2px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--tone) 14%, transparent);
    color: color-mix(in srgb, var(--tone) 72%, var(--text));
    font-size: 0.85rem;
    font-weight: 800;
    transition: background-color 0.25s, color 0.25s;
}

.question--loading {
    align-items: center;
    min-height: 66px;
}

.question--loading::before {
    content: "";
}

.question--loading .skeleton-line {
    height: 16px;
    margin: 0;
}

.question-body {
    flex: 1;
    min-width: 0;
}

.question > .speak-btn {
    margin-top: 2px;
    animation: rise 0.3s var(--ease) both;
}

.phrase {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.2rem;
    line-height: 1.9;
}

/* Desplegable integrado en la frase */
.prep-select {
    appearance: none;
    -webkit-appearance: none;
    min-width: 92px;
    margin-inline: 2px;
    padding: 2px 30px 2px 12px;
    border-radius: 10px;
    border: 2px dashed color-mix(in srgb, var(--tone) 55%, var(--border));
    background-color: color-mix(in srgb, var(--tone) 8%, var(--surface));
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237f8aa3' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 14px;
    color: color-mix(in srgb, var(--tone) 72%, var(--text));
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 800;
    vertical-align: baseline;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s, box-shadow 0.2s;
}

.prep-select:hover {
    border-color: var(--tone);
}

.prep-select:focus {
    outline: none;
    border-style: solid;
    border-color: var(--tone);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--tone) 18%, transparent);
}

.prep-select.has-value {
    border-style: solid;
}

/* Segundo hueco de una misma frase: repite lo elegido */
.prep-mirror {
    display: inline-block;
    min-width: 40px;
    padding: 0 6px;
    border-bottom: 2px dashed color-mix(in srgb, var(--tone) 55%, var(--border));
    color: color-mix(in srgb, var(--tone) 72%, var(--text));
    font-family: var(--font-sans);
    font-weight: 800;
    text-align: center;
}

/* Estados tras comprobar */
.question.is-correct {
    border-color: color-mix(in srgb, var(--success) 55%, var(--border));
    background: color-mix(in srgb, var(--success) 6%, var(--surface));
}

.question.is-correct::before {
    content: "✓";
    background: var(--success);
    color: #ffffff;
}

.question.is-correct .prep-select {
    border-style: solid;
    border-color: var(--success);
    background-color: color-mix(in srgb, var(--success) 12%, var(--surface));
    color: color-mix(in srgb, var(--success) 75%, var(--text));
}

.question.is-incorrect {
    border-color: color-mix(in srgb, var(--danger) 55%, var(--border));
    background: color-mix(in srgb, var(--danger) 5%, var(--surface));
}

.question.is-incorrect::before {
    content: "✕";
    background: var(--danger);
    color: #ffffff;
}

.question.is-incorrect .prep-select {
    border-style: solid;
    border-color: var(--danger);
    background-color: color-mix(in srgb, var(--danger) 10%, var(--surface));
    color: color-mix(in srgb, var(--danger) 80%, var(--text));
    text-decoration: line-through;
}

.question.is-incorrect.just-checked {
    animation: shake 0.45s ease-in-out;
}

.feedback {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    background: var(--surface-2);
    animation: rise 0.35s var(--ease) both;
}

.feedback p {
    margin: 0;
}

.feedback-answer {
    font-weight: 700;
}

.feedback-answer strong {
    padding: 1px 8px;
    border-radius: 6px;
    background: var(--success);
    color: #ffffff;
}

.feedback-explanation {
    margin-top: 6px !important;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Resumen de puntuación */
.summary {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 24px;
    padding: 20px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow);
    animation: rise 0.4s var(--ease) both;
}

.summary-score {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 3rem;
    line-height: 1;
    color: var(--primary-text);
    font-variant-numeric: tabular-nums;
}

.summary-total {
    color: var(--text-muted);
    font-size: 1.6rem;
}

.summary-text {
    flex: 1;
}

.summary-title {
    margin: 0 0 10px;
    font-weight: 800;
    font-size: 1.1rem;
}

.progress {
    height: 10px;
    overflow: hidden;
    border-radius: 999px;
    background: var(--surface-2);
}

.progress-fill {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--success), #4fd18b);
    transition: width 0.6s var(--ease);
}

.exercise-actions {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

@media (max-width: 560px) {
    .question {
        padding: 16px;
        gap: 12px;
    }

    .phrase {
        font-size: 1.08rem;
    }

    .exercise-actions .btn {
        flex: 1;
    }

    .summary {
        padding: 16px 18px;
    }

    .summary-score {
        font-size: 2.4rem;
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(5px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(2px); }
}

/* ---------- Ejercicios de frases (Excercises/frases.html) ---------- */

.page-header .chip {
    margin-bottom: 10px;
}

.serie-teoria {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 10px;
    margin-top: 12px !important;
    font-size: 0.92rem;
}

.teoria-label {
    color: var(--text-muted);
    font-weight: 700;
}

.teoria-link {
    padding: 3px 12px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--tone) 35%, var(--border));
    background: color-mix(in srgb, var(--tone) 8%, var(--surface));
    color: color-mix(in srgb, var(--tone) 72%, var(--text));
    font-weight: 700;
    text-decoration: none;
    transition: background-color 0.2s;
}

.teoria-link:hover {
    background: color-mix(in srgb, var(--tone) 16%, var(--surface));
}

.frase-q .chip {
    margin-bottom: 6px;
}

/* Hueco para escribir dentro de la frase */
.blank-input {
    max-width: 100%;
    margin-inline: 2px;
    padding: 1px 8px;
    border: 0;
    border-bottom: 2px dashed color-mix(in srgb, var(--tone) 55%, var(--border));
    border-radius: 8px 8px 0 0;
    background: color-mix(in srgb, var(--tone) 8%, var(--surface));
    color: color-mix(in srgb, var(--tone) 72%, var(--text));
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 800;
    text-align: left;
    transition: border-color 0.2s, background-color 0.2s, box-shadow 0.2s;
}

.blank-input:focus {
    outline: none;
    border-bottom-style: solid;
    border-bottom-color: var(--tone);
    box-shadow: 0 4px 0 -2px color-mix(in srgb, var(--tone) 25%, transparent);
}

.verb-hint {
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-style: italic;
    font-weight: 600;
    white-space: nowrap;
}

.question.is-correct .blank-input {
    border-bottom-style: solid;
    border-bottom-color: var(--success);
    background: color-mix(in srgb, var(--success) 12%, var(--surface));
    color: color-mix(in srgb, var(--success) 75%, var(--text));
}

.question.is-incorrect .blank-input {
    border-bottom-style: solid;
    border-bottom-color: var(--danger);
    background: color-mix(in srgb, var(--danger) 10%, var(--surface));
    color: color-mix(in srgb, var(--danger) 80%, var(--text));
    text-decoration: line-through;
}

/* "¡Casi!": solo fallan los acentos */
.question.is-almost {
    border-color: color-mix(in srgb, #e0901f 55%, var(--border));
    background: color-mix(in srgb, #e0901f 6%, var(--surface));
}

.question.is-almost::before {
    content: "~";
    background: #e0901f;
    color: #ffffff;
}

.question.is-almost .blank-input {
    border-bottom-style: solid;
    border-bottom-color: #e0901f;
    background: color-mix(in srgb, #e0901f 12%, var(--surface));
}

.feedback-alt {
    color: var(--text-muted);
    font-weight: 600;
}

.feedback-tense {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 6px !important;
    font-size: 0.9rem;
    font-weight: 700;
}

.feedback-tense .chip {
    align-self: center;
}

.feedback-translation {
    margin-top: 6px !important;
    font-style: italic;
}

.question.is-correct .feedback {
    background: transparent;
    padding: 0;
    margin-top: 8px;
}

/* Teclado de acentos fijo en la parte inferior */
.accent-dock {
    position: sticky;
    bottom: 0;
    z-index: 5;
    margin: 24px -20px -64px;
    padding: 10px 20px calc(10px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 85%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.accent-dock accent-keys {
    gap: 5px;
}

.accent-dock .accent-key {
    min-width: 34px;
    height: 34px;
}