/* ========================================
   FEED.CSS - Feed Section Styles
   ======================================== */

/* Feed Container */
.feed-container {
    max-width: 100%;
    margin: 0 auto;
}

/* Feed Posts */
#feedPosts {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Empty Feed State */
.empty-feed {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-feed i {
    font-size: 4rem;
    color: var(--border-color);
    margin-bottom: 1rem;
}

.empty-feed h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-feed p {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Post Card Base */
.post-card {
    background: var(--surface-color);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: var(--transition);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-card:hover {
    box-shadow: var(--shadow-md);
}

/* Post Header */
.post-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.post-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.post-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 1.3rem;
}

.post-user-details {
    flex: 1;
}

.post-username {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.verified-badge {
    color: var(--primary-color);
    font-size: 0.9rem;
}

.post-handle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.post-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

/* Post Menu */
.post-menu-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.post-menu-btn:hover {
    background: var(--background-color);
    color: var(--text-primary);
}

/* Post Content */
.post-content {
    margin-bottom: 1rem;
}

.post-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 0;
    word-wrap: break-word;
}

/* Text Post with Background Color */
.post-content.colored-bg {
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 1rem;
}

.post-content.colored-bg .post-text {
    font-size: 1.3rem;
    font-weight: 500;
}

/* Post Media */
.post-media {
    margin: 1rem 0;
    border-radius: 12px;
    overflow: hidden;
}

.post-media img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 500px;
    object-fit: cover;
}

/* Post Actions */
.post-actions {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.action-btn i {
    font-size: 1.1rem;
}

.action-btn:hover {
    background: var(--background-color);
    color: var(--text-primary);
}

.action-btn:active {
    transform: scale(0.95);
}

/* Action Button States */
.action-btn.liked {
    color: var(--error-color);
}

.action-btn.liked:hover {
    color: var(--error-color);
    background: rgba(244, 67, 54, 0.1);
}

.action-btn.saved {
    color: var(--primary-color);
}

.action-btn.saved:hover {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

/* Action Count */
.action-count {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Quiz Post Specific Styles */
.quiz-question {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.quiz-option {
    padding: 1rem;
    background: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.quiz-option:hover {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.05);
    transform: translateX(4px);
}

.quiz-option.selected {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

.quiz-option.correct {
    border-color: var(--success-color);
    background: rgba(76, 175, 80, 0.1);
}

.quiz-option.incorrect {
    border-color: var(--error-color);
    background: rgba(244, 67, 54, 0.1);
}

.quiz-option.disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* Quiz Explanation */
.quiz-explanation {
    background: var(--background-color);
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    display: none;
}

.quiz-explanation.show {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quiz-explanation-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.quiz-explanation-header i {
    color: var(--success-color);
}

.quiz-explanation-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* Poll Post Specific Styles */
.poll-question {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.poll-options {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.poll-option {
    flex: 1;
    padding: 1.5rem;
    background: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    font-size: 1.1rem;
}

.poll-option.true-option {
    color: var(--success-color);
}

.poll-option.false-option {
    color: var(--error-color);
}

.poll-option:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.poll-option.selected {
    border-width: 3px;
    box-shadow: var(--shadow-md);
}

.poll-option.true-option.selected {
    border-color: var(--success-color);
    background: rgba(76, 175, 80, 0.1);
}

.poll-option.false-option.selected {
    border-color: var(--error-color);
    background: rgba(244, 67, 54, 0.1);
}

/* Poll Result */
.poll-result {
    background: var(--background-color);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    text-align: center;
    display: none;
}

.poll-result.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.poll-result.correct {
    border: 2px solid var(--success-color);
    background: rgba(76, 175, 80, 0.05);
}

.poll-result.incorrect {
    border: 2px solid var(--error-color);
    background: rgba(244, 67, 54, 0.05);
}

.poll-result-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.poll-result-icon.correct {
    color: var(--success-color);
}

.poll-result-icon.incorrect {
    color: var(--error-color);
}

.poll-result-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* Flashcard Post Specific Styles */
.flashcard-container {
    perspective: 1000px;
    min-height: 250px;
    margin-bottom: 1rem;
}

.flashcard {
    position: relative;
    width: 100%;
    height: 250px;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    cursor: pointer;
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.flashcard-front {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: #FFFFFF;
}

.flashcard-back {
    background: linear-gradient(135deg, var(--success-color) 0%, #388E3C 100%);
    color: #FFFFFF;
    transform: rotateY(180deg);
}

.flashcard-content {
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.5;
}

.flashcard-label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    font-size: 0.8rem;
    font-weight: 500;
    opacity: 0.8;
}

.flip-hint {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.flip-hint i {
    margin-right: 0.3rem;
}

/* Post Stats */
.post-stats {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.stat-item i {
    font-size: 0.9rem;
}

/* Loading State */
.post-loading {
    text-align: center;
    padding: 2rem;
}

.post-loading .spinner-border {
    width: 2rem;
    height: 2rem;
}

/* Responsive Design */
@media (max-width: 576px) {
    .post-card {
        padding: 1rem;
        border-radius: 12px;
    }
    
    .post-avatar {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .post-username {
        font-size: 0.95rem;
    }
    
    .post-handle {
        font-size: 0.8rem;
    }
    
    .action-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .action-btn i {
        font-size: 1rem;
    }
    
    .quiz-question {
        font-size: 1rem;
    }
    
    .quiz-option {
        padding: 0.85rem;
        font-size: 0.9rem;
    }
    
    .poll-options {
        gap: 0.75rem;
    }
    
    .poll-option {
        padding: 1.25rem;
        font-size: 1rem;
    }
    
    .flashcard {
        height: 200px;
    }
    
    .flashcard-content {
        font-size: 1.1rem;
    }
}

/* Dark Mode Adjustments */
body.dark-mode .post-content.colored-bg {
    filter: brightness(0.8);
}

body.dark-mode .quiz-option:hover {
    background: rgba(33, 150, 243, 0.15);
}

body.dark-mode .poll-option:hover {
    background: rgba(33, 150, 243, 0.15);
}