/* Loading Screen */
.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader {
    width: 48px;
    height: 48px;
    border: 5px solid var(--accent-color);
    border-bottom-color: transparent;
    border-radius: 50%;
    animation: rotation 1s linear infinite;
}

@keyframes rotation {
    0% {
        transform: rotate(0deg)
    }

    100% {
        transform: rotate(360deg)
    }
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0
    }

    100% {
        background-position: -200% 0
    }
}

/* AOS Animations */
[data-aos] {
    opacity: 0;
    transition-property: opacity, transform;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Skill Bars */
.skill-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    margin: 8px 0;
}

.skill-progress {
    height: 100%;
    background: var(--accent-color);
    border-radius: 4px;
    transform-origin: left;
    animation: skillProgress 1s ease-out forwards;
}

@keyframes skillProgress {
    from {
        transform: scaleX(0)
    }

    to {
        transform: scaleX(var(--progress))
    }
}

/* Portfolio Filter Animations */
.portfolio-item {
    transition: all 0.4s ease;
}

.portfolio-item.hidden {
    opacity: 0;
    transform: scale(0.8);
}