/* Module: 01-loading-overlay.css */
/* Scope: Initial app loading overlay, spinner, and startup transitions. */

/*
----------------------------------------------------
 Initial Loading Overlay
----------------------------------------------------
*/
.initial-loading-overlay {
    position: fixed;
    inset: 0;
    width: 100vw;
    min-height: 100dvh;
    background: linear-gradient(135deg, var(--theme-primary) 0%, var(--theme-primary-active) 100%);
    display: grid;
    place-items: center;
    z-index: 10000;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}

.initial-loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.initial-loading-overlay:not(.hidden) ~ #main-nav-bar {
    visibility: hidden;
    pointer-events: none;
}

.initial-loading-content {
    text-align: center;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
    padding: 1.75rem 1.5rem;
}

.initial-loading-mark {
    position: relative;
    width: 132px;
    height: 132px;
    display: grid;
    place-items: center;
}

.initial-loading-glow {
    position: absolute;
    inset: 14px;
    border-radius: 50%;
    padding: 1rem;
    background: radial-gradient(circle, var(--theme-white-34) 0%, var(--theme-white-8) 48%, transparent 74%);
    filter: blur(8px);
    animation: pulse 1.8s ease-in-out infinite;
}

.initial-loading-logo-shell {
    position: relative;
    z-index: 1;
    width: 88px;
    height: 88px;
    border-radius: 100%;
    background: linear-gradient(180deg, var(--theme-white-96) 0%, var(--theme-white-88) 100%);
    box-shadow:
        0 24px 44px var(--theme-dark-34),
        0 8px 18px var(--theme-dark-18),
        inset 0 0 0 1px var(--theme-white-72);
    display: grid;
    place-items: center;
    overflow: hidden;
}

.initial-loading-logo-shell::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(180deg, var(--theme-white-26) 0%, transparent 44%, var(--theme-dark-8) 100%);
    pointer-events: none;
}

.initial-loading-logo-shell::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: -10px;
    height: 18px;
    background: var(--theme-dark-24);
    filter: blur(10px);
    z-index: -1;
    pointer-events: none;
}

.initial-loading-logo {
    width: 100%;
    object-fit: contain;
    filter: drop-shadow(0 12px 20px var(--theme-primary-24));
}

.initial-spinner {
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    background: conic-gradient(
        from 0deg,
        var(--theme-white-16) 0deg,
        var(--theme-white-98) 96deg,
        var(--theme-primary-85) 196deg,
        var(--theme-white-14) 286deg,
        transparent 320deg,
        var(--theme-white-16) 360deg
    );
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 10px), var(--theme-dark) calc(100% - 9px));
    mask: radial-gradient(farthest-side, transparent calc(100% - 10px), var(--theme-dark) calc(100% - 9px));
    box-shadow: 0 0 0 1px var(--theme-white-22);
    animation: spin 0.9s linear infinite;
    z-index: 2;
    pointer-events: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.initial-loading-text {
    font-size: 1.1rem;
    font-weight: 500;
    margin: 0;
    min-height: 2rem;
    color: var(--theme-white-92);
    animation: pulse 1.5s ease-in-out infinite;
}

body.ui-pending {
    overflow: hidden;
}

body.ui-pending > :not(#startup-loading-overlay):not(.main-shell-header-row):not(.app-header-row) {
    visibility: hidden;
    pointer-events: none;
}

body.ui-pending > .main-shell-header-row,
body.ui-pending > .app-header-row {
    visibility: visible;
    pointer-events: auto;
}

body.ui-pending > #startup-loading-overlay {
    visibility: visible;
    pointer-events: auto;
}
/* App Name in Initial Loading Overlay */
.app-name {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 1px;
    text-shadow: 0 10px 26px var(--theme-dark-26);
}

@media (max-width: 640px) {
    .initial-loading-mark {
        width: 112px;
        height: 112px;
    }

    .initial-loading-logo-shell {
        width: 76px;
        height: 76px;
        border-radius: 50%;
    }

    .app-name {
        font-size: 1.7rem;
    }
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}