/* ── Progressive Web App ── */

:root {
    --pwa-safe-top: env(safe-area-inset-top, 0px);
    --pwa-safe-bottom: env(safe-area-inset-bottom, 0px);
    --pwa-safe-left: env(safe-area-inset-left, 0px);
    --pwa-safe-right: env(safe-area-inset-right, 0px);
}

.pwa-offline-bar,
.pwa-install-banner,
.pwa-update-banner,
.pwa-ios-hint {
    position: fixed;
    left: 0;
    right: 0;
    z-index: 120;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.pwa-offline-bar.show,
.pwa-install-banner.show,
.pwa-update-banner.show,
.pwa-ios-hint.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.pwa-offline-bar {
    top: 0;
    padding: 10px 16px;
    padding-top: calc(10px + var(--pwa-safe-top));
    background: #7c2d12;
    color: #fff7ed;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
}

.pwa-install-banner {
    bottom: calc(16px + var(--pwa-safe-bottom));
    left: 16px;
    right: 16px;
    margin: 0 auto;
    max-width: 560px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.pwa-install-content {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.pwa-install-icon img {
    display: block;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.pwa-install-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.pwa-install-text strong {
    font-size: 14px;
    color: var(--text);
}

.pwa-install-text span {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.35;
}

.pwa-install-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.pwa-update-banner {
    top: 0;
    padding: 12px 18px;
    padding-top: calc(12px + var(--pwa-safe-top));
    background: linear-gradient(135deg, var(--primary), #6d71d6);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 600;
}

.pwa-ios-hint {
    bottom: calc(16px + var(--pwa-safe-bottom));
    left: 16px;
    right: 16px;
    margin: 0 auto;
    max-width: 420px;
}

.pwa-ios-hint-inner {
    position: relative;
    background: var(--sidebar-bg);
    color: white;
    border-radius: 16px;
    padding: 16px 42px 16px 16px;
    box-shadow: var(--shadow-lg);
}

.pwa-ios-hint-inner strong {
    display: block;
    margin-bottom: 4px;
}

.pwa-ios-hint-inner span {
    font-size: 13px;
    color: #d1d5db;
}

.pwa-ios-hint-inner em {
    font-style: normal;
    color: #fff;
    font-weight: 700;
}

.pwa-ios-hint-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    border: 0;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    color: white;
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
}

body.pwa-offline .topbar {
    top: 36px;
}

body.pwa-standalone {
    overscroll-behavior-y: contain;
}

body.pwa-standalone .app-shell {
    min-height: 100vh;
    min-height: 100dvh;
}

body.pwa-standalone .topbar {
    padding-top: var(--pwa-safe-top);
    height: calc(68px + var(--pwa-safe-top));
}

body.pwa-standalone .sidebar {
    padding-top: var(--pwa-safe-top);
    padding-bottom: var(--pwa-safe-bottom);
}

body.pwa-standalone .page-content {
    padding-bottom: calc(32px + var(--pwa-safe-bottom));
}

body.pwa-standalone .pwa-install-trigger,
body.pwa-standalone .pwa-install-banner,
body.pwa-standalone .pwa-ios-hint {
    display: none !important;
}

body.pwa-standalone .mobile-menu-btn {
    margin-left: var(--pwa-safe-left);
}

@media (display-mode: standalone) {
    body {
        overscroll-behavior-y: contain;
    }

    .topbar {
        padding-top: var(--pwa-safe-top);
        height: calc(68px + var(--pwa-safe-top));
    }

    .sidebar {
        padding-top: var(--pwa-safe-top);
        padding-bottom: var(--pwa-safe-bottom);
    }

    .page-content {
        padding-bottom: calc(32px + var(--pwa-safe-bottom));
    }
}

@media (max-width: 640px) {
    .pwa-install-banner {
        flex-direction: column;
        align-items: stretch;
    }

    .pwa-install-actions {
        justify-content: flex-end;
    }
}

/* Auth / marketing pages using PWA banners */
.auth-layout,
body:not(.pwa-enabled) .pwa-install-banner {
    /* no-op placeholder */
}

body.pwa-enabled.auth-page {
    min-height: 100vh;
    min-height: 100dvh;
}

body.pwa-enabled.auth-page .pwa-install-banner {
    z-index: 200;
}