/* Modern Top Loading Bar */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--loading-overlay-bg);
    backdrop-filter: blur(4px);
    z-index: 9999;
    opacity: 0;
    animation: fadeIn 0.2s ease-out forwards;
    pointer-events: none;
}

html[data-theme="dark"] .loading-overlay {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(6px);
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.loading-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        transparent 0%,
        #cbd5ff 25%,
        #60a5fa 50%,
        #cbd5ff 75%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.45);
}

html[data-theme="dark"] .loading-overlay::before {
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(96, 165, 250, 0.4) 25%,
        rgba(59, 130, 246, 0.65) 50%,
        rgba(96, 165, 250, 0.4) 75%,
        transparent 100%
    );
    box-shadow: 0 2px 12px rgba(37, 99, 235, 0.45);
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    opacity: 0;
    animation: fadeInUp 0.4s ease-out 0.2s forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--gray-200);
    border-top: 3px solid transparent;
    border-right: 3px solid transparent;
    border-radius: 50%;
    animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    margin: 0 auto var(--spacing-sm);
}

html[data-theme="dark"] .spinner {
    border: 3px solid rgba(148, 163, 184, 0.4);
    border-top: 3px solid transparent;
    border-right: 3px solid transparent;
}

.loading-spinner p {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

html[data-theme="dark"] .loading-spinner p {
    color: #c7c7cc;
}