/* Botón de cambio de tema */
.theme-toggle {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 999;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 15px var(--card-shadow);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle i {
    transition: transform 0.3s ease;
}

.theme-toggle:hover i {
    transform: rotate(20deg);
}

/* Responsive */
@media (max-width: 768px) {
    .theme-toggle {
        top: 70px;
        right: 15px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}