.oauth-icon-btn {
    width: 4rem;
    height: 4rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    border: 1px solid #cbd5e1;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
    text-decoration: none;
    transition: transform 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
    touch-action: manipulation;
}

.oauth-icon-btn:hover {
    transform: scale(1.08);
    background: #ffffff;
    box-shadow: 0 6px 20px rgba(15, 23, 42, 0.14);
}

.oauth-icon-btn:focus-visible {
    outline: 2px solid #334155;
    outline-offset: 2px;
}

.oauth-icon-btn .oauth-icon-glyph {
    display: inline-block;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--oauth-provider-color, #1e293b);
}

.oauth-icon-debug {
    margin-top: 0.75rem;
    text-align: center;
    color: #64748b;
}

.oauth-icon-debug .oauth-icon-glyph {
    font-size: 1rem;
}