/* ==========================================================
   Portfolio
   ========================================================== */

   .portfolio {
    width: 100%;
    background: var(--color-light);
}


/* ----------------------------------------------------------
   Portfolio header
   ---------------------------------------------------------- */

.portfolio-header {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 27px 40px;
    background: var(--color-dark);
    color: var(--color-light);
}

.portfolio-header h2 {
    margin: 0;
    font-size: var(--font-size-heading);
    font-weight: var(--font-extra-bold);
    line-height: 1.1;
    text-transform: uppercase;
}


/* ----------------------------------------------------------
   Portfolio grid
   ---------------------------------------------------------- */

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}


/* ----------------------------------------------------------
   Portfolio item
   ---------------------------------------------------------- */

@media screen and (min-width: 1301px) {

    .portfolio-item:nth-child(n + 9) {
        display: none;
    }

}

.portfolio-item {
    position: relative;
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-dark);
    color: var(--color-light);
    text-decoration: none;
}

.portfolio-poster {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.portfolio-preview {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    z-index: 2;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.portfolio-item.is-previewing .portfolio-preview {
    opacity: 1;
}


/* ----------------------------------------------------------
   Portfolio title
   ---------------------------------------------------------- */

.portfolio-title {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 4;
    color: var(--color-light);
    font-size: 18px;
    font-weight: var(--font-bold);
    line-height: 1.2;
    text-transform: uppercase;
    pointer-events: none;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}


/* ----------------------------------------------------------
   Portfolio footer / filters
   ---------------------------------------------------------- */

.portfolio-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
    padding: 18px 30px;
    background: var(--color-dark);
    color: var(--color-light);
}

.portfolio-filter {
    margin: 0;
    padding: 12px 18px;
    border: 0;
    background: transparent;
    color: var(--color-light);
    font-size: var(--font-size-menu);
    font-weight: var(--font-bold);
    text-transform: uppercase;
    cursor: pointer;
}

.portfolio-filter.is-active {
    text-decoration: underline;
}

.portfolio-filter-hidden {
    display: none;
}


/* ==========================================================
   Tablet
   ========================================================== */

@media screen and (min-width: 701px) and (max-width: 1300px) {

    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }

}


/* ==========================================================
   Mobile
   ========================================================== */

@media screen and (max-width: 700px) {

    .portfolio-header {
        padding: 20px 20px;
    }

    .portfolio-header h2 {
        font-size: 20px;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    /*
     * Black separators between mobile videos.
     */

    .portfolio-item {
        margin-bottom: 30px;
    }
    .portfolio {
        background-color: var(--color-dark);
    }
    
    .portfolio-item:last-child {
        margin-bottom: 0;
    }

    .portfolio-item:nth-child(n + 6) {
        display: none;
    }

    .portfolio-title {
        top: 15px;
        left: 15px;
        font-size: 16px;
    }

    .portfolio-mobile-hidden {
        display: none;
    }

    .portfolio-footer {
        padding: 10px 10px;
    }

    .portfolio-filter {
        padding: 7px 10px;
        font-size: 12px;
    }

}