/**
 * QFlow Loading Screen with Sprite Sheet Animation
 */

.qflow-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    background-image: url('../loading_images_and_popups/Desktop_Laptop%20(1).webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

.qflow-loader::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    z-index: 0;
}

.qflow-loader > * {
    position: relative;
    z-index: 1;
}

.qflow-loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.qflow-loader__animation {
    width: 250px;
    height: 250px;
    background-image: url('../Loader/loader_sheet.png');
    background-size: 1250px auto; /* 5 columns × 250px */
    background-position: 0 0;
    background-repeat: no-repeat;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.qflow-loader__text {
    margin-top: 2rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: #000000;
    animation: qflow-loader-pulse 1.5s ease-in-out infinite;
}

@keyframes qflow-loader-pulse {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

.qflow-loader__spinner {
    margin-top: 1rem;
    width: 40px;
    height: 40px;
    border: 3px solid var(--accent-color-light);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: qflow-loader-spin 0.8s linear infinite;
}

@keyframes qflow-loader-spin {
    to {
        transform: rotate(360deg);
    }
}

/* Smooth fade-in for page content after loader */
body.loading .page-shell {
    opacity: 0;
}

body:not(.loading) .page-shell {
    animation: qflow-page-fadein 0.5s ease-out forwards;
}

@keyframes qflow-page-fadein {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive loading screen backgrounds */
@media (max-width: 768px) {
    .qflow-loader {
        background-image: url('../loading_images_and_popups/Mobile%20(2).webp');
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .qflow-loader {
        background-image: url('../loading_images_and_popups/Tablet%20(2).webp');
    }
}