.nb-portfolio {
    --nb-portfolio-hover-fill: #f8f5f2;
    --nb-portfolio-noise-opacity: 0.9;
    --nb-portfolio-noise-speed: 0.3s;
    --nb-portfolio-fill-in: 0.2s;
    --nb-portfolio-fill-out: 0.8s;
    --nb-portfolio-zoom-duration: 0.8s;

    position: relative;
    width: 100%;
    height: 100vh;
    background-color: #1a1917;
    color: #f8f5f2;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Background image */
.nb-portfolio__bg-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.nb-portfolio__bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.2);
    transition: transform var(--nb-portfolio-zoom-duration) cubic-bezier(0.25, 0.46, 0.45, 0.94);
    opacity: 0;
}

.nb-portfolio__bg-image:not([src]) {
    display: none;
}

/* Noise overlay */
.nb-portfolio__noise {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: transparent url("https://assets.iceable.com/img/noise-transparent.png") repeat 0 0;
    background-size: 300px 300px;
    animation: nb-portfolio-noise var(--nb-portfolio-noise-speed) steps(5) infinite;
    opacity: var(--nb-portfolio-noise-opacity);
    will-change: transform;
    z-index: 50;
    pointer-events: none;
}

@keyframes nb-portfolio-noise {
    0%   { transform: translate(0, 0); }
    10%  { transform: translate(-2%, -3%); }
    20%  { transform: translate(-4%, 2%); }
    30%  { transform: translate(2%, -4%); }
    40%  { transform: translate(-2%, 5%); }
    50%  { transform: translate(-4%, 2%); }
    60%  { transform: translate(3%, 0); }
    70%  { transform: translate(0, 3%); }
    80%  { transform: translate(-3%, 0); }
    90%  { transform: translate(2%, 2%); }
    100% { transform: translate(1%, 0); }
}

/* Container */
.nb-portfolio__container {
    width: 100%;
    max-width: 1000px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    position: relative;
}

/* Projects list */
.nb-portfolio__projects {
    width: 100%;
    position: relative;
    z-index: 10;
    max-height: 80vh;
    overflow-y: auto;
    padding: 20px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nb-portfolio__projects::-webkit-scrollbar {
    display: none;
}

/* Project item */
.nb-portfolio__item {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.nb-portfolio__item:hover {
    color: inherit;
    text-decoration: none;
}

/* Title and year */
.nb-portfolio__title,
.nb-portfolio__date {
    font-size: 1.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.03em;
    position: relative;
    z-index: 2;
    mix-blend-mode: exclusion;
    margin: 0;
    line-height: 1.2;
}

/* Hover fill animation */
.nb-portfolio__item::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--nb-portfolio-hover-fill);
    z-index: 1;
    pointer-events: none;
    transition: height var(--nb-portfolio-fill-in) cubic-bezier(0.445, 0.05, 0.55, 0.95) 0s;
}

.nb-portfolio__item:hover::before {
    height: 100%;
}

.nb-portfolio__item:not(:hover)::before {
    transition-duration: var(--nb-portfolio-fill-out);
}

/* Responsive */
@media (max-width: 768px) {
    .nb-portfolio__title,
    .nb-portfolio__date {
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    .nb-portfolio__item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
}