:root{--brand:#2e7d32;--brand-dark:#1f2937}
.install-banner{
  position:fixed;left:0;right:0;bottom:0;background:var(--brand-dark);color:#fff;
  display:none;align-items:center;gap:.85rem;padding:.9rem 1rem;box-shadow:0 -8px 20px rgba(0,0,0,.25);z-index:9999
}
.install-banner.show{display:flex}
.install-banner .logo{width:40px;height:40px;border-radius:8px;flex:0 0 auto}
.install-banner .text{flex:1}
.install-banner .title{margin:0 0 .2rem;font-weight:700}
.install-banner .subtitle{margin:0;opacity:.85}
.install-banner .actions{display:flex;gap:.5rem}
.install-banner button{padding:.6rem .9rem;border-radius:10px;border:1px solid #374151;background:#fff;color:#111827;font-weight:600;cursor:pointer}
.install-banner button.install{background:var(--brand);color:#fff;border:none}
.install-banner .close{background:transparent;border:none;color:#fff;font-size:1.1rem}