/**
 * Subtle Engagement Styles for InkMuse
 * User-friendly and non-intrusive engagement elements
 */

/* Reading Progress Bar */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    z-index: var(--z-header, 1000);
    backdrop-filter: blur(10px);
}

.reading-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    width: 0%;
    transition: width 0.3s ease;
}

/* Subtle Engagement Card */
.subtle-engagement {
    position: fixed;
    bottom: 20px;
    right: 20px;
    max-width: 320px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    z-index: var(--z-notification, 4000);
    transform: translateY(100px);
    opacity: 0;
    animation: slideInUp 0.5s ease forwards;
    backdrop-filter: blur(10px);
}

@keyframes slideInUp {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.engagement-content h4 {
    margin: 0 0 8px 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

.engagement-content p {
    margin: 0 0 16px 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.engagement-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.btn-subtle {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-subtle:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.btn-primary {
    background: var(--color-primary);
    border: none;
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.close-engagement {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.close-engagement:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

/* Related Content Section */
.subtle-related-content {
    margin-top: 40px;
    padding: 30px 0;
    border-top: 1px solid var(--color-border);
}

.subtle-related-content h3 {
    margin: 0 0 20px 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

/* Subtle Share Button */
.subtle-share-button {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: var(--z-tooltip, 3000);
}

.share-toggle {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.share-toggle:hover {
    background: var(--color-primary);
    color: white;
    transform: scale(1.1);
}

.share-options {
    position: absolute;
    left: 60px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-50%) translateX(-10px);
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    min-width: 120px;
}

.share-options.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
}

.share-options button {
    background: none;
    border: none;
    padding: 8px 12px;
    text-align: left;
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--color-text);
    transition: background 0.2s ease;
}

.share-options button:hover {
    background: var(--color-surface-hover);
}

.share-facebook:hover { background: rgba(24, 119, 242, 0.1); }
.share-twitter:hover { background: rgba(29, 161, 242, 0.1); }
.share-whatsapp:hover { background: rgba(37, 211, 102, 0.1); }
.share-copy:hover { background: rgba(108, 117, 125, 0.1); }

/* Copy Confirmation */
.copy-confirmation {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-success, #28a745);
    color: white;
    padding: 12px 20px;
    border-radius: 6px;
    font-size: 0.9rem;
    z-index: var(--z-notification, 4000);
    animation: fadeInOut 2s ease;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0; transform: translateX(-50%) translateY(20px); }
    10%, 90% { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .subtle-engagement {
        bottom: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
        margin: 0 10px;
    }
    
    .subtle-share-button {
        left: 10px;
        bottom: 80px;
        top: auto;
        transform: none;
    }
    
    .share-options {
        left: 0;
        top: -120px;
        transform: none;
        flex-direction: row;
        min-width: auto;
    }
    
    .share-options.active {
        transform: none;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .engagement-actions {
        flex-direction: column;
    }
    
    .btn-subtle,
    .btn-primary {
        width: 100%;
        justify-content: center;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .subtle-engagement,
    .share-toggle,
    .share-options {
        border-width: 2px;
    }
    
    .reading-progress-bar {
        height: 4px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .subtle-engagement,
    .share-toggle,
    .reading-progress-fill {
        animation: none;
        transition: none;
    }
}

/* Focus styles for accessibility */
.btn-subtle:focus,
.btn-primary:focus,
.close-engagement:focus,
.share-toggle:focus,
.share-options button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
    .reading-progress-bar {
        background: rgba(0, 0, 0, 0.3);
    }
    
    .subtle-engagement,
    .share-toggle,
    .share-options {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    }
}