/**
 * Sentence Builder Styles
 * Grammar production exercise - Minimalistic activation-first design
 * Pro-only feature - Matches grammar exercises styling
 */

.sentence-builder {
    max-width: 800px;
    margin: 0 auto;
    font-family: 'Poppins', sans-serif;
}

/* Main Exercise Card - matches .exercise-question-card */
.sb-exercise-card {
    background: var(--bg-white, #FEFEFE);
    border: 2px solid var(--border-primary, #E8E3DA);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
}

/* Topic Badge - matches .question-type-badge */
.sb-topic-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: rgba(92, 111, 92, 0.1);
    color: var(--primary-dark, #2d5f4d);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

/* Rule Hint - subtle, not prominent */
.sb-hint {
    font-size: 0.9rem;
    color: var(--text-muted, #9E9689);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

/* Sentence Construction Area - Primary Focus */
.sb-construction-area {
    margin-bottom: 1.5rem;
}

.sb-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted, #9E9689);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.sb-sentence-box {
    min-height: 64px;
    padding: 1rem;
    background: var(--bg-cream, #F7F4EF);
    border: 2px solid var(--border-primary, #E8E3DA);
    border-radius: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    transition: border-color 0.2s ease;
}

.sb-sentence-box:hover {
    border-color: var(--primary, #5C6F5C);
}

.sb-placeholder {
    color: var(--text-muted, #9E9689);
    font-size: 0.875rem;
}

/* Selected Words - clean pills */
.sb-selected-word {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: var(--primary, #5C6F5C);
    color: white;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sb-selected-word:hover {
    background: #ef4444;
    transform: scale(0.95);
}

/* Word Bank - Activation First */
.sb-word-bank {
    margin-bottom: 1.5rem;
}

.sb-words {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.sb-word {
    padding: 0.5rem 1rem;
    background: var(--bg-white, #FEFEFE);
    border: 2px solid var(--border-primary, #E8E3DA);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary, #3A3633);
    cursor: pointer;
    transition: all 0.15s ease;
}

.sb-word:hover:not(.used) {
    border-color: var(--primary, #5C6F5C);
    background: var(--bg-cream, #F7F4EF);
}

.sb-word.used {
    background: var(--bg-cream, #F7F4EF);
    border-color: transparent;
    color: var(--text-muted, #9E9689);
    cursor: default;
    opacity: 0.4;
}

/* Actions - centered, clean */
.sb-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
}

.sb-clear-btn,
.sb-submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sb-clear-btn {
    background: transparent;
    border: 2px solid var(--border-primary, #E8E3DA);
    color: var(--text-muted, #9E9689);
}

.sb-clear-btn:hover:not(:disabled) {
    border-color: #ef4444;
    color: #ef4444;
}

.sb-submit-btn {
    background: var(--primary, #5C6F5C);
    border: 2px solid var(--primary, #5C6F5C);
    color: white;
}

.sb-submit-btn:hover:not(:disabled) {
    background: var(--primary-dark, #2d5f4d);
    border-color: var(--primary-dark, #2d5f4d);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(92, 111, 92, 0.25);
}

.sb-clear-btn:disabled,
.sb-submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Spinner */
.sb-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* Feedback - matches .feedback-card */
.sb-feedback {
    margin-top: 1.5rem;
}

.sb-feedback.hidden {
    display: none;
}

.sb-feedback-card {
    background: var(--bg-white, #FEFEFE);
    border: 2px solid var(--border-primary, #E8E3DA);
    border-radius: 8px;
    padding: 1.5rem;
}

.sb-feedback-card.correct {
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.03);
}

.sb-feedback-card.incorrect {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.03);
}

.sb-feedback-card.error {
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.03);
}

.sb-feedback-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.sb-feedback-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.sb-feedback-title.correct {
    color: #22c55e;
}

.sb-feedback-title.incorrect {
    color: #ef4444;
}

/* Answer Display */
.sb-user-answer,
.sb-correct-answer {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.sb-user-answer {
    background: rgba(239, 68, 68, 0.05);
    border-left: 3px solid #ef4444;
    color: var(--text-secondary, #3A3633);
}

.sb-correct-answer {
    background: rgba(34, 197, 94, 0.05);
    border-left: 3px solid #22c55e;
    color: var(--text-secondary, #3A3633);
}

.sb-explanation {
    padding: 0.875rem 1rem;
    background: rgba(92, 111, 92, 0.05);
    border-radius: 6px;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-secondary, #3A3633);
    margin-bottom: 1rem;
}

.sb-grammar-tip {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(245, 158, 11, 0.06);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary, #3A3633);
    margin-bottom: 1rem;
}

.sb-grammar-tip svg {
    color: #f59e0b;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

/* Feedback Actions */
.sb-feedback-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.25rem;
    flex-wrap: wrap;
}

.sb-next-btn,
.sb-petra-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sb-next-btn {
    background: var(--primary, #5C6F5C);
    border: none;
    color: white;
}

.sb-next-btn:hover {
    background: var(--primary-dark, #2d5f4d);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(92, 111, 92, 0.25);
}

.sb-petra-btn {
    background: rgba(92, 111, 92, 0.08);
    border: 1px solid rgba(92, 111, 92, 0.2);
    color: var(--primary, #5C6F5C);
}

.sb-petra-btn:hover {
    background: rgba(92, 111, 92, 0.12);
    border-color: rgba(92, 111, 92, 0.3);
}

/* Mobile Responsive */
@media (max-width: 640px) {
    .sb-exercise-card {
        padding: 1.5rem;
    }
    
    .sb-sentence-box {
        min-height: 56px;
        padding: 0.75rem;
    }
    
    .sb-selected-word,
    .sb-word {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .sb-actions {
        flex-direction: column;
    }
    
    .sb-clear-btn,
    .sb-submit-btn {
        width: 100%;
        justify-content: center;
    }
    
    .sb-feedback-actions {
        flex-direction: column;
    }
    
    .sb-next-btn,
    .sb-petra-btn {
        width: 100%;
        justify-content: center;
    }
}