/**
 * Single Post View Styles
 *
 * Full-page single post view with video player, comments, and engagement.
 * Uses variables.css tokens for theming.
 * Pure CSS — NO Bootstrap, NO Tailwind.
 *
 * @package    ContentFlows
 * @version    1.0.0
 */

.single-post-container {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-5) var(--space-4) var(--space-10);
}

/* Back Navigation */
.single-post-nav {
    margin-bottom: var(--space-4);
}

.single-post-back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: color var(--transition-base), background var(--transition-base);
}

.single-post-back-link:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
}

.single-post-back-link svg {
    width: 18px;
    height: 18px;
}

/* Post Card */
.single-post-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* Header */
.single-post-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-subtle);
}

.single-post-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.single-post-avatar-link {
    display: block;
    flex-shrink: 0;
}

.single-post-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid var(--color-border);
}

.single-post-user-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.single-post-username {
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.single-post-username:hover {
    color: var(--color-primary);
}

.single-post-verified {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 10px;
}

.single-post-timestamp {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.single-post-follow-button {
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-base);
}

.single-post-follow-button:hover {
    background: var(--color-primary-hover);
    transform: scale(1.02);
}

.single-post-follow-button.following {
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

/* Description */
.single-post-description {
    padding: var(--space-4);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-border-subtle);
}

/* Media */
.single-post-media {
    width: 100%;
    background: #000;
}

.single-post-video,
.single-post-image {
    width: 100%;
    max-height: 80vh;
    object-fit: contain;
    display: block;
}

/* Actions */
.single-post-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-subtle);
}

.single-post-action-group {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.single-post-action-button {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: background var(--transition-base), color var(--transition-base);
    text-decoration: none;
}

.single-post-action-button:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.single-post-action-emoji {
    font-size: var(--text-lg);
}

.single-post-action-count {
    font-weight: var(--weight-medium);
}

.single-post-views {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* Comments Section */
.single-post-comments-section {
    padding: var(--space-4);
}

.single-post-comments-title {
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    margin: 0 0 var(--space-4) 0;
    color: var(--color-text-primary);
}

.single-post-comment-input-wrapper {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.single-post-comment-input {
    flex: 1;
    padding: var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.single-post-comment-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.single-post-comment-submit {
    padding: var(--space-3) var(--space-4);
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    transition: background var(--transition-base);
}

.single-post-comment-submit:hover {
    background: var(--color-primary-hover);
}

.single-post-login-prompt {
    padding: var(--space-3);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    text-align: center;
    margin-bottom: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.single-post-login-prompt a {
    color: var(--color-primary);
    font-weight: var(--weight-semibold);
}

/* Comments List */
.single-post-comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.single-post-comment-item {
    display: flex;
    gap: var(--space-3);
}

.single-post-comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    object-fit: cover;
    flex-shrink: 0;
}

.single-post-comment-body {
    flex: 1;
}

.single-post-comment-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-1);
}

.single-post-comment-author {
    font-weight: var(--weight-semibold);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    text-decoration: none;
}

.single-post-comment-author:hover {
    color: var(--color-primary);
}

.single-post-comment-time {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.single-post-comment-text {
    margin: 0;
    font-size: var(--text-sm);
    line-height: 1.5;
    color: var(--color-text-primary);
}

.single-post-comments-empty {
    text-align: center;
    padding: var(--space-6);
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
}

/* Responsive */
@media (max-width: 640px) {
    .single-post-container {
        padding: var(--space-3) var(--space-2) var(--space-8);
    }
    
    .single-post-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .single-post-follow-button {
        align-self: flex-end;
    }
    
    .single-post-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .single-post-action-group {
        flex-wrap: wrap;
    }
}