.auth-home-link {
    position: absolute;
    top: 20px;
    left: 24px;
    z-index: 20;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
    padding: 10px 14px;
    border: 1px solid var(--borda-cinza);
    border-radius: var(--radius-sm);
    background: var(--branco);
    color: var(--azul-vibrante);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow-xs);
    transition: background-color .2s ease;
}
.auth-home-link svg { width: 18px; height: 18px; }
.auth-home-link:hover { background: var(--azul-suave); color: var(--azul-escuro); }
.auth-home-link:focus-visible { outline: 3px solid var(--azul-vibrante); outline-offset: 3px; }
body:has(.login-mockup) .auth-home-link {
    padding: 8px 14px;
    border: 1px solid var(--borda-cinza);
    border-radius: var(--radius-pill, 999px);
    background: var(--branco);
    color: var(--brand-blue);
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-xs);
    cursor: pointer;
}
body:has(.login-mockup) .auth-home-link:hover {
    background: var(--azul-suave);
    color: var(--azul-escuro);
}
body:has(.login-mockup) .auth-home-link:focus-visible {
    outline-color: var(--brand-blue);
}
.login-mockup.auth-main { padding-top: 80px; padding-bottom: 80px; }
/* Secondary navigation stays out of the header's document flow. */
body:has(.register-page) .auth-hero .auth-home-link {
    top: 0;
    left: 14px;
    padding: 8px 10px;
    border: 0;
    background: transparent;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    box-shadow: none;
    border-radius: 8px;
    cursor: pointer;
}
body:has(.register-page) .auth-hero .auth-home-link:hover {
    background: rgba(255, 255, 255, .08);
    color: #fff;
}
body:has(.register-page) .auth-hero .auth-home-link:focus-visible {
    outline-color: #fff;
}
@media (max-width: 600px) {
    .auth-home-link { top: 12px; left: 16px; }
    .login-mockup.auth-main { padding-top: 72px; padding-bottom: 72px; }
    body:has(.register-page) .auth-hero .auth-home-link { left: 6px; }
}