.install-prompt-banner{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(120%);width:calc(100% - 32px);max-width:500px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-md) var(--space-lg);box-shadow:var(--shadow-2xl),0 0 0 1px rgba(255,255,255,0.1);z-index:10000;transition:transform 0.6s cubic-bezier(0.34,1.56,0.64,1);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.install-prompt-banner.show{transform:translateX(-50%) translateY(0)}.install-prompt-content{display:flex;align-items:center;gap:var(--space-lg)}.install-icon{width:48px;height:48px;background:linear-gradient(135deg,var(--primary-blue),var(--accent-purple));border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;color:white;font-size:1.25rem;box-shadow:0 4px 12px rgba(31,86,232,0.30);flex-shrink:0}.install-text{flex:1;display:flex;flex-direction:column;gap:2px}.install-text strong{font-size:1rem;color:var(--text-dark);font-weight:700}.install-text span{font-size:0.85rem;color:var(--text-soft)}.install-actions{display:flex;gap:var(--space-sm);align-items:center}.install-prompt-banner .btn{white-space:nowrap}[data-theme="dark"] .install-prompt-banner{background:rgba(30,41,59,0.8);border-color:var(--border-dark);box-shadow:0 20px 50px rgba(0,0,0,0.5)}@media (max-width:600px){.install-prompt-banner{bottom:16px;padding:var(--space-md)}.install-prompt-content{gap:var(--space-md)}.install-icon{width:40px;height:40px;font-size:1rem}.install-actions{flex-direction:column;gap:4px}.install-actions .btn{width:100%;padding:6px 12px;font-size:0.8rem}}@media (prefers-reduced-motion:reduce){.install-prompt-banner{transition:opacity 0.3s ease;transform:translateX(-50%) translateY(0);opacity:0}.install-prompt-banner.show{opacity:1}}