:root {
    --pwa-banner-height: 48px;
    --pwa-transition: 0.3s ease;
}

.pwa-install-banner,
.pwa-update-banner,
.pwa-offline-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--pwa-banner-height);
    background: var(--surface);
    border-top: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    z-index: 9999;
    animation: slideUp var(--pwa-transition);
}

.pwa-offline-banner {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    border-color: rgba(239, 68, 68, 0.2);
}

.pwa-update-banner {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(99, 102, 241, 0.05));
    border-color: rgba(99, 102, 241, 0.2);
}

.pwa-banner-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text);
}

.pwa-banner-content .material-symbols-outlined {
    font-size: 1.25rem;
}

.pwa-offline-banner .pwa-banner-content .material-symbols-outlined {
    color: var(--error);
}

.pwa-update-banner .pwa-banner-content .material-symbols-outlined {
    color: var(--primary-light);
}

.pwa-banner-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pwa-banner-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.pwa-banner-btn.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.pwa-banner-btn.primary:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
}

.pwa-banner-btn .material-symbols-outlined {
    font-size: 1rem;
}

#pwaUpdateBanner,
#pwaOfflineBanner {
    display: none;
}

.pwa-install-banner.bottom-offset,
.pwa-update-banner.bottom-offset,
.pwa-offline-banner.bottom-offset {
    bottom: var(--pwa-banner-height);
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(100%);
        opacity: 0;
    }
}

body.offline .content-area {
    filter: grayscale(0.5);
    opacity: 0.8;
}

body.standalone .pwa-install-banner {
    display: none !important;
}

.pwa-install-prompt {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 360px;
    width: 90%;
    text-align: center;
    z-index: 10000;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.3s ease-out;
}

.pwa-install-prompt-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.pwa-install-prompt-icon .material-symbols-outlined {
    font-size: 2.5rem;
    color: white;
}

.pwa-install-prompt h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.pwa-install-prompt p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.pwa-install-prompt-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    text-align: left;
}

.pwa-install-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
}

.pwa-install-feature .material-symbols-outlined {
    font-size: 1.125rem;
    color: var(--success);
}

.pwa-install-prompt-actions {
    display: flex;
    gap: 0.75rem;
}

.pwa-install-prompt-actions button {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pwa-install-prompt-actions .btn-install {
    background: var(--primary);
    border: none;
    color: white;
}

.pwa-install-prompt-actions .btn-install:hover {
    background: var(--primary-light);
}

.pwa-install-prompt-actions .btn-dismiss {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text);
}

.pwa-install-prompt-actions .btn-dismiss:hover {
    background: rgba(255, 255, 255, 0.05);
}

@keyframes modalIn {
    from {
        transform: translate(-50%, -50%) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

.share-target-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.share-target-card h4 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.share-target-apps {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.share-target-app {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-target-app:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

@media (max-width: 767px) {
    .pwa-install-banner,
    .pwa-update-banner,
    .pwa-offline-banner {
        height: 56px;
    }

    .pwa-banner-content {
        font-size: 0.8rem;
    }

    .pwa-banner-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.75rem;
    }
}

@media (display-mode: standalone) {
    .pwa-install-banner,
    #pwaInstallBtn {
        display: none !important;
    }
}

/* Offline Page Enhancements */
.status-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #9ca3af;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
    animation: pulse 2s ease-in-out infinite;
}

.status-dot.connected {
    background: #22c55e;
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.last-sync {
    font-size: 12px;
    color: #6b7280;
}

.support-link {
    color: #6366f1;
    text-decoration: underline;
    transition: color 0.2s ease;
}

.support-link:hover {
    color: #818cf8;
}

/* Accessibility Enhancements */
[aria-label] { outline: none; }
[aria-label]:focus { outline: 2px solid #6366f1; outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* High contrast mode support */
@media (prefers-contrast: high) {
    .button { border: 2px solid #fff; }
    body { background: #000; color: #fff; }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

/* Offline Page Enhancements */
.status-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #9ca3af;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
    animation: pulse 2s ease-in-out infinite;
}

.status-dot.connected {
    background: #22c55e;
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.last-sync {
    font-size: 12px;
    color: #6b7280;
}

.support-link {
    color: #6366f1;
    text-decoration: underline;
    transition: color 0.2s ease;
}

.support-link:hover {
    color: #818cf8;
}

/* Accessibility Enhancements */
[aria-label] { outline: none; }
[aria-label]:focus { outline: 2px solid #6366f1; outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* High contrast mode support */
@media (prefers-contrast: high) {
    .button { border: 2px solid #fff; }
    body { background: #000; color: #fff; }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}