.site-back-button {
    position: fixed;
    top: 18px;
    left: 18px;
    z-index: 10000;
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    gap: 8px;
    padding: 9px 15px;
    border: 1px solid rgba(148, 180, 211, 0.28);
    border-radius: 999px;
    color: #f3f8fc;
    font: 700 0.78rem/1 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: 0.02em;
    text-decoration: none;
    background: rgba(6, 16, 29, 0.78);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.site-back-button:hover,
.site-back-button:focus-visible {
    border-color: rgba(89, 185, 245, 0.7);
    outline: none;
    background: rgba(17, 36, 58, 0.94);
    transform: translateY(-2px);
}

.site-back-button__arrow {
    font-size: 1.05rem;
    color: #59b9f5;
}

@media (max-width: 600px) {
    .site-back-button {
        top: 12px;
        left: 12px;
        min-height: 38px;
        padding: 8px 12px;
        font-size: 0.72rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .site-back-button { transition: none; }
}