/* ─── Гостевой баннер авторизации ──────────────────────────────────────── */

.gc-auth-banner {
    position: fixed;
    bottom: calc(max(env(safe-area-inset-bottom, 0px), var(--gc-body-pad-bottom, 0px)) + var(--space-4));
    left: calc(var(--gc-overlay-left, 0px) + var(--space-4));
    right: calc(var(--gc-overlay-right, 0px) + var(--space-4));
    max-width: var(--layout-event-main-max-width);
    margin-inline: auto;
    box-sizing: border-box;
    z-index: 1060;
    background: var(--surface-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-16);
    padding: var(--space-4);
    display: flex;
    /* Текст · кнопки · close — одна верхняя линия */
    align-items: flex-start;
    gap: var(--space-4);
    box-shadow: 0 -4px 24px color-mix(in srgb, var(--fill-emphasis) 15%, transparent);
    animation: gc-banner-slide-up 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes gc-banner-slide-up {
    from { transform: translateY(100%); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}

.gc-auth-banner.gc-banner-hiding {
    animation: gc-banner-slide-down 0.25s ease-in forwards;
}

@keyframes gc-banner-slide-down {
    from { transform: translateY(0);    opacity: 1; }
    to   { transform: translateY(100%); opacity: 0; }
}

.gc-auth-banner-body {
    flex: 1;
    display: flex;
    align-items: flex-start;
    gap: var(--space-6);
    min-width: 0;
}

.gc-auth-banner-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    /* Как gc-list-title + gc-list-meta: ритм только из line-height */
    gap: 0;
    min-width: 0;
}

.gc-auth-banner-text strong {
    margin: 0;
    font-size: var(--type-ui-title-size);
    font-weight: 500;
    line-height: var(--type-ui-title-line-height);
    color: var(--text-primary);
}

.gc-auth-banner-text span {
    margin: 0;
    font-size: var(--type-ui-caption-size);
    font-weight: 400;
    line-height: var(--type-ui-caption-line-height);
    color: var(--text-secondary);
}

.gc-auth-banner-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

.gc-auth-banner-close {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-8);
    padding: 0;
    transition: background 0.15s, color 0.15s;
}

.gc-auth-banner-close:hover {
    background: var(--surface-elevated);
    color: var(--text-primary);
}

/* Челлендж: одна CTA вместо дефолтного гостевого баннера */
.gc-auth-banner--challenge-cta {
    padding: var(--space-2) var(--space-4);
}

.gc-auth-banner-body--challenge-cta {
    width: 100%;
}

.gc-auth-banner-challenge-submit {
    width: 100%;
    justify-content: center;
}

/* Мобильная версия */
@media (max-width: 991.98px) {
    .gc-auth-banner {
        padding: var(--space-2) var(--space-4);
    }

    .gc-auth-banner-body {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-3);
    }

    .gc-auth-banner-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .gc-auth-banner-actions .gc-btn {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .gc-auth-banner--challenge-cta {
        padding: var(--space-2) var(--space-4) calc(var(--space-2) + env(safe-area-inset-bottom));
    }
}