.portfolio-filters-placeholder {
    display: block;
    height: 0;
    transition: height 0.2s;
}

.filters.is-sticky {
    position: fixed !important;
    top: 0;
    left: 0;
    right: 0;
    width: 100% !important;
    float: none !important;
    z-index: 999;
    background: #ffffff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    padding: 14px 0 !important;
    margin-bottom: 0 !important;
    text-align: center !important;
    animation: filters-slide-down 0.25s ease;
}

@keyframes filters-slide-down {
    from { transform: translateY(-100%); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}

.portfolio-spinner {
    display: none;
    text-align: center;
    padding: 30px 0;
    width: 100%;
}
.portfolio-spinner.visible {
    display: block;
}
.portfolio-spinner__circle {
    display: inline-block;
    width: 48px;
    height: 48px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-top-color: #333;
    border-radius: 50%;
    animation: portfolio-spin 0.8s linear infinite;
}
@keyframes portfolio-spin {
    to { transform: rotate(360deg); }
}

.formulario_portfolio{
    background-color: #f1f1f1;
    padding: 10px;
    border: solid 1px #bbb;
}
.formulario_portfolio input{
    padding: 5px;
    width: 100%;
    border: 0;
}
.formulario_portfolio textarea{
    padding: 5px;
    width: 100%;
    min-height: 300px;
    border: 0;
}