/**
 * iOS-подобная навигация: nav bar, safe area.
 * Переходы по ссылкам — нативные (без JS-анимаций, чтобы не было дёрганья).
 */

/* ——— iOS nav bar (настройки, редактирование) ——— */
.ios-nav-bar {
    display: none;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    column-gap: 0.75rem;
    min-height: 44px;
    margin: 0 0 0.75rem;
    padding: 0.5rem var(--space-4);
    position: sticky;
    top: var(--header-height);
    z-index: 40;
    background: color-mix(in srgb, var(--color-bg-primary) 92%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 65%, transparent);
}

.ios-nav-back {
    grid-column: 1;
    justify-self: start;
}

.ios-nav-title {
    grid-column: 2;
    flex: none;
    margin: 0;
    text-align: center;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    max-width: 100%;
}

.ios-nav-action,
.ios-nav-spacer {
    grid-column: 3;
    justify-self: end;
}

.ios-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
    min-height: 44px;
    min-width: 44px;
    padding: 0 0.35rem;
    border: none;
    background: none;
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: opacity var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.ios-nav-btn:active {
    opacity: 0.55;
}

.ios-nav-back span {
    font-size: 1.05rem;
}

.ios-nav-back [data-lucide],
.ios-nav-back svg {
    width: 1.35rem;
    height: 1.35rem;
    margin-left: 0;
}

.ios-nav-action {
    font-weight: 600;
    justify-content: flex-end;
    padding-right: 0;
}

.ios-nav-spacer {
    min-width: 44px;
    min-height: 44px;
}

.nav-stack-page .page-header {
    display: none;
}

.nav-stack-page .post-create-actions .btn-outline.btn-sm[href] {
    display: none;
}

@media (min-width: 769px) {
    .nav-stack-page .page-header {
        display: block;
    }
}

@media (max-width: 768px) {
    .ios-nav-bar {
        display: grid;
        padding-top: calc(0.5rem + env(safe-area-inset-top, 0px));
    }

    .nav-stack-page .ios-nav-bar {
        top: var(--header-height);
    }
}

@media (min-width: 769px) {
    .ios-nav-bar--always {
        display: grid;
        top: var(--header-height);
    }
}

body.auth-page-enter {
    background-color: var(--color-bg);
}

[data-theme="dark"] body.auth-page-enter {
    background-color: transparent;
}

/* Auth: мягкое появление карточки при первой загрузке */
body.auth-page-enter .auth-layout {
    animation: ios-auth-in 360ms cubic-bezier(0.32, 0.72, 0, 1) both;
}

@keyframes ios-auth-in {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    body.auth-page-enter .auth-layout {
        animation: none !important;
    }
}