/**
 * COREN page loader — compact letter-wave animation.
 */
#loading-wrapper.coren-page-loader {
    position: fixed;
    inset: 0;
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(229, 233, 244, 0.82);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: opacity 0.45s ease, visibility 0.45s ease;
}

#loading-wrapper.coren-page-loader.coren-page-loader--hide {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.coren-page-loader__card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.65rem;
    padding: 1.1rem 1.35rem 1rem;
    background: #fff;
    border: 1px solid rgba(47, 167, 122, 0.18);
    border-radius: 14px;
    box-shadow:
        0 12px 32px rgba(47, 167, 122, 0.12),
        0 2px 8px rgba(15, 23, 42, 0.06);
    min-width: 9.5rem;
}

.coren-page-loader__letters {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.12rem;
    line-height: 1;
}

.coren-page-loader__letter {
    display: inline-block;
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: #94a3b8;
    opacity: 0.4;
    transform: translateY(4px) scale(0.9);
    animation: coren-letter-wave 1.35s ease-in-out infinite;
}

.coren-page-loader__letter:nth-child(1) { animation-delay: 0s; }
.coren-page-loader__letter:nth-child(2) { animation-delay: 0.12s; }
.coren-page-loader__letter:nth-child(3) { animation-delay: 0.24s; }
.coren-page-loader__letter:nth-child(4) { animation-delay: 0.36s; }
.coren-page-loader__letter:nth-child(5) { animation-delay: 0.48s; }

@keyframes coren-letter-wave {
    0%,
    100% {
        opacity: 0.38;
        color: #94a3b8;
        transform: translateY(4px) scale(0.9);
        text-shadow: none;
    }
    45% {
        opacity: 1;
        color: #2fa77a;
        transform: translateY(-2px) scale(1.02);
        text-shadow: 0 4px 14px rgba(47, 167, 122, 0.28);
    }
}

.coren-page-loader__hint {
    margin: 0;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #64748b;
}

.coren-page-loader__track {
    width: 100%;
    height: 3px;
    border-radius: 999px;
    background: rgba(47, 167, 122, 0.12);
    overflow: hidden;
}

.coren-page-loader__track span {
    display: block;
    height: 100%;
    width: 35%;
    border-radius: inherit;
    background: linear-gradient(90deg, #2fa77a 0%, #268f66 100%);
    animation: coren-loader-bar 1.1s ease-in-out infinite;
}

@keyframes coren-loader-bar {
    0% {
        transform: translateX(-120%);
    }
    100% {
        transform: translateX(320%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .coren-page-loader__letter {
        animation: none;
        opacity: 1;
        color: #2fa77a;
        transform: none;
    }

    .coren-page-loader__track span {
        animation: none;
        width: 70%;
        margin: 0 auto;
    }
}