.scroll-progress-container {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 50px;
    height: 50px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.scroll-progress-container.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-progress-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: conic-gradient(#18af3d 0%, #e0e0e0 0%);
    transition: background 0.1s linear;
}

.scroll-progress-circle-inner {
    position: absolute;
    top: 4px;
    left: 4px;
    width: calc(100% - 8px);
    height: calc(100% - 8px);
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-progress-text {
    position: relative;
    color: #18af3d;
    font-size: 14px;
    font-weight: bold;
    z-index: 2;
    transition: opacity 0.2s;
}

.scroll-progress-icon {
    position: absolute;
    color: #18af3d;
    font-size: 20px;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-progress-container.done .scroll-progress-text {
    opacity: 0;
}

.scroll-progress-container.done .scroll-progress-icon {
    opacity: 1;
}