/* GCA global page loader + realtime latency metrics */
html.gca-page-loading,
html.gca-page-busy {
    overflow: hidden;
}

html.gca-page-loading body,
html.gca-page-busy body {
    overflow: hidden;
    pointer-events: none;
    user-select: none;
}

.gca-page-loader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(15, 30, 48, 0.88);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

html.gca-page-loading .gca-page-loader,
html.gca-page-busy .gca-page-loader {
    opacity: 1;
    visibility: visible;
}

.gca-page-loader__panel {
    text-align: center;
    color: #fff;
    width: min(100%, 400px);
    padding: 2rem 1.75rem 1.65rem;
    border-radius: 16px;
    background: linear-gradient(145deg, rgba(30, 58, 95, 0.95) 0%, rgba(22, 45, 71, 0.98) 100%);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.gca-page-loader__spinner {
    width: 52px;
    height: 52px;
    margin: 0 auto 1.15rem;
    border: 4px solid rgba(255, 255, 255, 0.15);
    border-top-color: #00cfe8;
    border-radius: 50%;
    animation: gca-loader-spin 0.75s linear infinite;
}

.gca-page-loader__brand {
    margin: 0 0 0.5rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.gca-page-loader__text {
    margin: 0 0 1rem;
    font-size: 1.02rem;
    font-weight: 700;
    line-height: 1.45;
}

.gca-page-loader__metrics {
    margin: 0 0 1rem;
    padding: 0.85rem 0.95rem 0.75rem;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.22);
    border: 1px solid rgba(255, 255, 255, 0.06);
    text-align: left;
}

.gca-page-loader__elapsed-wrap {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.55rem;
}

.gca-page-loader__elapsed-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.gca-page-loader__elapsed {
    font-size: 1.35rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
    color: #fff;
}

.gca-page-loader__elapsed[data-level="fast"],
.gca-page-loader__stat-value[data-level="fast"] {
    color: #5eead4;
}

.gca-page-loader__elapsed[data-level="medium"],
.gca-page-loader__stat-value[data-level="medium"] {
    color: #fcd34d;
}

.gca-page-loader__elapsed[data-level="slow"],
.gca-page-loader__stat-value[data-level="slow"] {
    color: #fca5a5;
}

.gca-page-loader__progress {
    height: 5px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    overflow: hidden;
    margin-bottom: 0.65rem;
}

.gca-page-loader__progress-bar {
    height: 100%;
    width: 0;
    border-radius: inherit;
    background: linear-gradient(90deg, #00cfe8 0%, #5eead4 100%);
    transition: width 0.18s ease-out;
}

.gca-page-loader__phase {
    margin: 0 0 0.65rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.35;
}

.gca-page-loader__stats {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.45rem 0.75rem;
}

.gca-page-loader__stats li {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
}

.gca-page-loader__stat-label {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.48);
}

.gca-page-loader__stat-value {
    font-size: 0.88rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: rgba(255, 255, 255, 0.92);
}

.gca-page-loader__hint {
    margin: 0;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.62);
    line-height: 1.4;
    text-align: center;
}

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

@media (max-width: 420px) {
    .gca-page-loader__panel {
        padding: 1.5rem 1.15rem 1.25rem;
    }

    .gca-page-loader__elapsed {
        font-size: 1.15rem;
    }

    .gca-page-loader__stats {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .gca-page-loader__spinner {
        animation-duration: 1.5s;
    }

    .gca-page-loader,
    .gca-page-loader__progress-bar {
        transition: none;
    }
}