/*
 * Styles for Interactive Exercise Pages
 */

.exercise-header {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.exercise-title {
    margin-bottom: 0;
}

.exercise-controls {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
    margin-top: 2rem;
    justify-content: flex-end;
}

.exercise-results {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    display: none; /* Hidden by default */
    border: 1px solid transparent;
}
.exercise-results.correct {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}
.exercise-results.incorrect {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.exercise {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}
.exercise:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
}

.exercise-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.exercise-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
}
.exercise-instruction {
    font-size: 0.95rem;
    color: var(--text-color-light);
    margin-bottom: 1.5rem;
    background-color: #f9f9f9;
    padding: 0.75rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

/* === Exercise 1: Multiple Choice === */
.mcq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
.mcq-group {
    position: relative;
    padding-right: 25px; /* Space for icon */
}
.mcq-question {
    font-weight: 600;
    margin-bottom: 0.75rem;
}
.mcq-options {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.mcq-options label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
}
.mcq-options input[type="radio"] {
    margin-right: 0.5rem;
}

/* === Exercises 2 & 3: Fill in the blank === */
.fill-in-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}
.fill-in-group {
    display: flex;
    align-items: center;
    gap: 0.5ch; /* Use character unit for spacing around input */
    flex-wrap: wrap; /* Allow wrapping on small screens */
    position: relative;
    padding-right: 25px; /* Space for icon */
}
.fill-in-group span {
    line-height: 1.5;
}
.fill-in-group input[type="text"] {
    flex-grow: 1;
    min-width: 150px;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-align: center;
}

/* === Exercise 4: Short Answer === */
.short-answer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem 2rem;
}
.short-answer-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    position: relative;
    padding-right: 25px;
}
.short-answer-group span:first-child {
    font-weight: 600;
}
.short-answer-group span:last-child {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.short-answer-group input[type="text"] {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 100px;
}

/* === Exercises 5 & 6: Sentence Scramble / Translation === */
.sentence-scramble-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}
.sentence-scramble-group {
    position: relative;
    padding-right: 25px;
}
.sentence-scramble-group p {
    color: var(--text-color-light);
    margin-bottom: 0.5rem;
}
.sentence-scramble-group input[type="text"] {
    width: 100%;
    padding: 0.5rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

/* === Feedback Styles === */
.feedback-icon {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    font-size: 1.2rem;
}
.mcq-group .feedback-icon {
    top: 0;
    transform: translateY(0);
}
.is-correct .feedback-icon { color: var(--success-color); }
.is-incorrect .feedback-icon { color: var(--error-color); }

.is-correct > label[data-checked="true"] { background-color: #d4edda; }
.is-incorrect > label[data-checked="true"] { background-color: #f8d7da; }

input[type="text"].is-correct { border-color: var(--success-color); background-color: #f2fcf5; }
input[type="text"].is-incorrect { border-color: var(--error-color); background-color: #fdf4f5; }

.correct-answer-feedback {
    display: block;
    font-size: 0.85rem;
    color: #4CAF50;
    margin-top: 0.25rem;
    width: 100%;
    text-align: left;
    padding-left: 20px;
}
.sentence-scramble-group .correct-answer-feedback {
    padding-left: 0;
}

/* === Responsive === */
@media (max-width: 992px) {
    .mcq-grid, .short-answer-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .exercise-title {
        font-size: 1.3rem;
    }
    .exercise-header {
        align-items: flex-start;
    }
    .exercise-controls {
        width: 100%;
        justify-content: center;
    }
}