/* ==========================================================================
   KBC Universal Fullscreen White Transition Loader
   Clean, 60fps GPU-accelerated with breathing logo fade effect
   ========================================================================== */

#kbc-page-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    background-color: #ffffff;
    z-index: 9999999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    box-sizing: border-box;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.25, 1, 0.5, 1), visibility 0.3s ease;
    user-select: none;
    -webkit-user-select: none;
}

#kbc-page-loader.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

#kbc-page-loader.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.kbc-loader-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    max-width: 90vw;
    max-height: 85vh;
}

.kbc-loader-logo {
    width: 220px;
    max-width: 78vw;
    height: auto;
    object-fit: contain;
    display: block;
    animation: kbcLogoFadePulse 1.8s ease-in-out infinite alternate;
    will-change: opacity, transform;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.03));
}

@media (min-width: 640px) {
    .kbc-loader-logo {
        width: 300px;
        max-width: 400px;
    }
}

@media (min-width: 1024px) {
    .kbc-loader-logo {
        width: 350px;
        max-width: 440px;
    }
}

@media (max-height: 500px) {
    .kbc-loader-logo {
        max-height: 45vh;
        width: auto;
    }
}

@keyframes kbcLogoFadePulse {
    0% {
        opacity: 0.28;
        transform: scale(0.97);
    }
    50% {
        opacity: 0.82;
        transform: scale(1.0);
    }
    100% {
        opacity: 1;
        transform: scale(1.03);
    }
}

@media (prefers-reduced-motion: reduce) {
    .kbc-loader-logo {
        animation: kbcLogoFadeReduced 1.8s ease-in-out infinite alternate;
    }
}

@keyframes kbcLogoFadeReduced {
    0% {
        opacity: 0.3;
    }
    100% {
        opacity: 1;
    }
}