.user-nav {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    flex-shrink: 0;
}

.user-nav__envelope {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.85rem;
    height: 1.85rem;
    border-radius: 999px;
    border: 1px solid rgba(56, 189, 248, 0.55);
    background: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
    text-decoration: none;
    flex-shrink: 0;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    animation: user-nav-envelope-pulse 2.4s ease-in-out infinite;
}

.user-nav__envelope:hover {
    border-color: rgba(56, 189, 248, 0.85);
    box-shadow: 0 0 14px rgba(56, 189, 248, 0.35);
    background: rgba(56, 189, 248, 0.24);
}

.user-nav__envelope-icon {
    font-size: 0.95rem;
    line-height: 1;
    filter: drop-shadow(0 0 4px rgba(56, 189, 248, 0.45));
}

@keyframes user-nav-envelope-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.25); }
    50% { box-shadow: 0 0 10px 2px rgba(56, 189, 248, 0.35); }
}

.user-nav__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.38rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(56, 189, 248, 0.35);
    background: rgba(15, 23, 42, 0.92);
    color: #e2e8f0;
    font-family: var(--font-main, "Inter", system-ui, sans-serif);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    max-width: 12rem;
}

.user-nav__btn:hover {
    border-color: rgba(56, 189, 248, 0.65);
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.2);
}

.user-nav__avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #38bdf8, #0284c7);
    color: #0f172a;
    font-size: 0.62rem;
    font-weight: 800;
    flex-shrink: 0;
}

.user-nav__label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-nav__btn--guest {
    border-color: rgba(148, 163, 184, 0.35);
    color: #94a3b8;
}

.user-nav__btn--guest:hover {
    color: #e2e8f0;
    border-color: rgba(56, 189, 248, 0.45);
}

body.chat-page .chat-topbar .user-nav {
    margin-left: 0;
}

body.chat-page .chat-topbar .lang-toggle {
    margin-left: 0;
}

.azure-locale-page .op-header__meta .user-nav,
.azure-locale-page .bb-header__lang .user-nav,
.azure-locale-page .ob-header .user-nav {
    margin-right: 0.35rem;
}

.azure-locale-page .bb-header__lang,
.azure-locale-page .op-header__meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}