.margin-top-min {
    margin-top: -70px;
}

.filter-btn.active {
    background: linear-gradient(135deg, #5C51E8, #7C3AED);
    color: white;
    box-shadow: 0 4px 15px rgba(92, 81, 232, 0.3);
}

/* Removed hover effects for better performance */

.portfolio-item {
    position: relative;
    overflow: hidden;
}

.portfolio-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.portfolio-item:hover::before {
    left: 100%;
}

.portfolio-item:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.4);
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fade-in 0.6s ease-out;
}

.animate-fade-in.delay-100 {
    animation-delay: 0.1s;
}

.animate-fade-in.delay-200 {
    animation-delay: 0.2s;
}

.animate-fade-in.delay-300 {
    animation-delay: 0.3s;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fade-in-up 0.8s ease-out;
}

/* پریلودر نمونه کارها */
.portfolio-preloader {
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

/* انیمیشن‌های delay */
.animation-delay-150 {
    animation-delay: 0.15s;
}

/* انیمیشن‌های سفارشی */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}