/* ========== Animation Utilities ========== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.fade-in-delay-1 {
    animation-delay: 0.2s;
}

.fade-in-delay-2 {
    animation-delay: 0.4s;
}

.fade-in-delay-3 {
    animation-delay: 0.6s;
}

/* Slide animations */
.slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scale animations */
.hover-scale {
    transition: transform 0.3s ease;
}

.hover-scale:hover {
    transform: scale(1.02);
}

/* Fade in on scroll */
.fade-in-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

/* Error message */
.error-message {
    background: rgba(255, 0, 0, 0.1);
    color: #ff4444;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-align: center;
    margin: var(--spacing-md) 0;
}

/* Keyframes */
@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Loading animation for images */
.image-loading {
    position: relative;
    overflow: hidden;
}

.image-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        to right,
        transparent 0%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 100%
    );
    animation: loading 1.5s infinite;
}

@keyframes loading {
    from {
        left: -100%;
    }
    to {
        left: 100%;
    }
}

/* ========== Button Hover Effects ========== */
.btn {
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

/* ========== Image Hover Effects ========== */
.hover-scale:hover {
    transform: scale(1.02);
}

/* ========== Feature Icons ========== */
.feature-icon {
    transition: transform 0.3s ease;
}

.feature:hover .feature-icon {
    transform: scale(1.1);
}

/* ========== Mobile Menu Animation ========== */
.nav-links {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

@media (max-width: 767px) {
    .nav-links[aria-expanded="false"] {
        transform: translateX(100%);
        opacity: 0;
    }
    
    .nav-links[aria-expanded="true"] {
        transform: translateX(0);
        opacity: 1;
    }
}