.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99999;
    display: none;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.loading-screen.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.15);
    border-top: 4px solid #fff;
    border-radius: 50%;
    animation: loading-spin 1s linear infinite;
}

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

.loading-tips {
    text-align: center;
    max-width: 400px;
}

.tip-text {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    margin: 0;
    transition: opacity 0.3s ease;
    font-style: italic;
    line-height: 1.5;
}

.loading-screen.fade-out {
    animation: loading-fade-out 1s ease-out forwards;
}

@keyframes loading-fade-out {
    to {
        opacity: 0;
        visibility: hidden;
    }
}