/* --- Reading Controls (Font Size Adjustment) --- */

:root {
    --reading-btn-bg: #ffffff;
    --reading-btn-color: #4a5568;
    --reading-btn-active: #1a365d;
}

/* Right Floating Bar (Desktop) */
.reading-bar-desktop {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 1000;
    transition: all 0.3s ease;
}

/* Control Group Style */
.reading-bar-desktop .reading-group {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 30px;
    padding: 0.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border: 1px solid rgba(0,0,0,0.05);
}

.reading-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--reading-btn-bg);
    color: var(--reading-btn-color);
    border: 1px solid rgba(0,0,0,0.05);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 700;
    position: relative;
}

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

.reading-btn:hover {
    background: var(--reading-btn-active);
    color: #ffffff;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.2);
}

.reading-btn.btn-reset {
    font-size: 0.9rem;
}

/* Tooltip (CSS only) */
.reading-btn::after {
    content: attr(title);
    position: absolute;
    right: 120%;
    background: #1a202c;
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
}

.reading-btn:hover::after {
    opacity: 1;
    visibility: visible;
    right: 130%;
}

/* Mobile Integration */
@media (max-width: 992px) {
    .reading-bar-desktop { display: none; }
    
    .share-bar-mobile {
        justify-content: space-around !important;
        gap: 0.5rem !important;
    }
    
    .mobile-divider {
        width: 1px;
        height: 24px;
        background: rgba(0,0,0,0.1);
        margin: 0 0.5rem;
        align-self: center;
    }
}

/* Smooth Article Sizing Transition */
.article-card {
    transition: font-size 0.3s ease;
}