/* Structure Viewer 2.2 – Loading Indicator */

.sv-loading {
    position: fixed;
    inset: 0;
    background: rgba(11, 15, 30, 0.75);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    gap: 14px;
}

.sv-loading span {
    font-size: 13px;
    font-weight: 600;
    color: var(--sv-text-2);
    letter-spacing: 0.02em;
}

.sv-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--sv-border-2);
    border-top-color: var(--sv-accent);
    border-radius: 50%;
    animation: sv-spin 0.75s linear infinite;
    box-shadow: 0 0 16px var(--sv-accent-glow);
}

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