body{margin:0;background:var(--portal-bg);color:var(--portal-ink);font-family:system-ui,sans-serif}*{box-sizing:border-box}.pwa-install-page{max-width:900px;margin:auto;padding: max(24px,env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(20px,env(safe-area-inset-left))}.pwa-step{border:1px solid var(--portal-border);border-radius:12px;padding:24px;margin:24px 0;background:var(--portal-surface)}.pwa-platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:20px}.pwa-platform-card:focus{outline:2px solid var(--portal-brand);outline-offset:4px}a{color:var(--portal-ink)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 16px;min-height:44px;text-decoration:none;cursor:pointer}.pwa-install-header h1{font-size:clamp(1.8rem,5vw,2.6rem)}p,li{line-height:1.6}[data-install-status=error]{color:var(--portal-danger,#b91c1c)}