:root {
    --pwa-primary: #1d4ed8;
    --pwa-primary-strong: #0f766e;
    --pwa-surface: #ffffff;
    --pwa-text: #0f172a;
    --pwa-muted: #64748b;
    --pwa-border: #dbe2ea;
    --pwa-shadow: 0 18px 48px -28px rgba(15, 23, 42, 0.55);
}

@media (display-mode: standalone) {
    html {
        min-height: 100%;
        background: #f8fafc;
    }

    body {
        overscroll-behavior-y: contain;
        -webkit-tap-highlight-color: transparent;
        user-select: text;
    }
}

.pwa-shell-content {
    scroll-behavior: smooth;
}

.pwa-offline-indicator,
.pwa-install-banner,
.pwa-update-banner {
    position: fixed;
    z-index: 3000;
    left: max(12px, env(safe-area-inset-left));
    right: max(12px, env(safe-area-inset-right));
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--pwa-border);
    background: color-mix(in srgb, var(--pwa-surface) 96%, transparent);
    color: var(--pwa-text);
    box-shadow: var(--pwa-shadow);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.pwa-offline-indicator {
    top: calc(10px + env(safe-area-inset-top));
    width: fit-content;
    max-width: calc(100vw - 24px);
    margin-inline: auto;
    padding: 9px 14px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    transform: translateY(-140%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.24s ease, opacity 0.24s ease;
}

.pwa-offline-indicator.is-visible {
    transform: translateY(0);
    opacity: 1;
}

.pwa-offline-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: #ef4444;
    box-shadow: 0 0 0 5px rgba(239, 68, 68, 0.12);
    flex: 0 0 auto;
}

.pwa-install-banner,
.pwa-update-banner {
    bottom: calc(14px + env(safe-area-inset-bottom));
    max-width: 520px;
    margin-inline: auto;
    padding: 12px;
    border-radius: 18px;
    transform: translateY(calc(100% + 32px));
    opacity: 0;
    pointer-events: none;
    transition: transform 0.24s ease, opacity 0.24s ease;
}

.pwa-install-banner.is-visible,
.pwa-update-banner.is-visible {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.pwa-install-icon,
.pwa-update-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    color: #ffffff;
    background: linear-gradient(135deg, var(--pwa-primary), var(--pwa-primary-strong));
    overflow: hidden;
}

.pwa-install-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pwa-install-copy,
.pwa-update-copy {
    min-width: 0;
    flex: 1 1 auto;
}

.pwa-install-title,
.pwa-update-title {
    margin: 0;
    color: var(--pwa-text);
    font-size: 0.88rem;
    font-weight: 800;
    line-height: 1.25;
}

.pwa-install-text,
.pwa-update-text {
    margin: 3px 0 0;
    color: var(--pwa-muted);
    font-size: 0.76rem;
    line-height: 1.4;
}

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

.pwa-button,
.pwa-icon-button {
    min-height: 48px;
    min-width: 48px;
    border: 0;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.pwa-button {
    padding-inline: 16px;
    color: #ffffff;
    background: linear-gradient(135deg, var(--pwa-primary), var(--pwa-primary-strong));
}

.pwa-icon-button {
    color: var(--pwa-muted);
    background: rgba(148, 163, 184, 0.12);
}

.pwa-bottom-nav {
    display: none;
}

@media (max-width: 768px) {
    .mobile-menu-btn,
    .close-sidebar-btn,
    .notification-btn,
    .logout-btn,
    .notification-close-btn,
    .notification-detail-close-btn {
        min-width: 48px;
        min-height: 48px;
    }

    .profile-link {
        min-height: 48px;
    }

    .pwa-shell-content {
        padding-bottom: calc(5.5rem + env(safe-area-inset-bottom)) !important;
    }

    .pwa-install-banner,
    .pwa-update-banner {
        bottom: calc(5.35rem + env(safe-area-inset-bottom));
        align-items: stretch;
    }

    .pwa-install-actions,
    .pwa-update-actions {
        align-self: center;
    }

    .pwa-install-text,
    .pwa-update-text {
        display: none;
    }

    .pwa-bottom-nav {
        position: fixed;
        z-index: 2600;
        left: 0;
        right: 0;
        bottom: 0;
        display: grid;
        grid-template-columns: repeat(var(--pwa-nav-count, 5), minmax(0, 1fr));
        gap: 2px;
        padding: 8px max(8px, env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));
        border-top: 1px solid var(--pwa-border);
        background: color-mix(in srgb, var(--pwa-surface) 94%, transparent);
        box-shadow: 0 -18px 42px -34px rgba(15, 23, 42, 0.8);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
    }

    .pwa-bottom-nav__item {
        min-width: 0;
        min-height: 56px;
        border-radius: 14px;
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        color: var(--pwa-muted);
        text-decoration: none;
        font-size: 0.68rem;
        font-weight: 800;
        line-height: 1.1;
        transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
    }

    .pwa-bottom-nav__item:active {
        transform: scale(0.98);
    }

    .pwa-bottom-nav__item.is-active {
        color: var(--pwa-primary);
        background: rgba(29, 78, 216, 0.1);
    }

    .pwa-bottom-nav__item svg,
    .pwa-bottom-nav__item i {
        width: 21px;
        height: 21px;
        flex: 0 0 auto;
    }
}

body.dark-theme,
.dark {
    --pwa-surface: #0f172a;
    --pwa-text: #f8fafc;
    --pwa-muted: #94a3b8;
    --pwa-border: #334155;
}

@media (prefers-reduced-motion: reduce) {
    .pwa-offline-indicator,
    .pwa-install-banner,
    .pwa-update-banner,
    .pwa-bottom-nav__item {
        transition: none;
    }
}