.sb-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--sb-general-color);
    z-index: 9999;
    width: 0;
    transition: opacity 0.4s ease, width 0.4s ease;
    pointer-events: none;
}

.sb-loading .sb-progress-bar {
    animation: sb-progress-load 0.8s ease forwards;
    opacity: 1;
}

.sb-loaded .sb-progress-bar {
    width: 100% !important;
    opacity: 0;
    transition: width 0.2s ease, opacity 0.4s ease 0.2s;
}

@keyframes sb-progress-load {
    from { width: 0; }
    to   { width: 70%; }
}

.sb-btt {
    position: fixed;
    bottom: 28px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: #1e293b;
    color: #ffffff;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease;
    z-index: 9990;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sb-btt.sb-btt-show {
    opacity: 1;
    pointer-events: auto;
}

.sb-btt:hover {
    background: var(--sb-general-color);
    transform: translateY(-3px);
}