.install-app-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease;text-decoration:none;white-space:nowrap}.install-app-btn .install-icon{flex-shrink:0}.install-app-btn .install-text{line-height:1}.install-app-btn.default{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.install-app-btn.default:hover{background:linear-gradient(135deg,#5a6fd8,#6a4190);transform:translateY(-1px);box-shadow:0 4px 12px rgba(102,126,234,.4)}.install-app-btn.default:active{transform:translateY(0);box-shadow:0 2px 8px rgba(102,126,234,.3)}.install-app-btn.primary{background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff}.install-app-btn.primary:hover{background:linear-gradient(135deg,#4338ca,#6d28d9);transform:translateY(-1px);box-shadow:0 4px 12px rgba(79,70,229,.4)}.install-app-btn.primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(79,70,229,.3)}.install-app-btn.secondary{background:rgba(0,0,0,0);color:#4f46e5;border:2px solid #4f46e5}.install-app-btn.secondary:hover{background:#4f46e5;color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(79,70,229,.3)}.install-app-btn.secondary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(79,70,229,.2)}.install-app-btn.outline{background:rgba(0,0,0,0);color:#6b7280;border:1px solid #d1d5db}.install-app-btn.outline:hover{background:#f9fafb;color:#374151;border-color:#9ca3af;transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.1)}.install-app-btn.outline:active{transform:translateY(0);box-shadow:0 2px 8px rgba(0,0,0,.1)}.install-app-btn.small{padding:6px 12px;font-size:12px}.install-app-btn.small .install-icon{width:14px;height:14px}.install-app-btn.large{padding:12px 24px;font-size:16px}.install-app-btn.large .install-icon{width:20px;height:20px}.install-app-btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important;box-shadow:none!important}.install-app-btn:focus{outline:2px solid #4f46e5;outline-offset:2px}.dark-theme .install-app-btn.outline{color:#d1d5db;border-color:#4b5563}.dark-theme .install-app-btn.outline:hover{background:#374151;color:#f9fafb;border-color:#6b7280}@media(max-width:768px){.install-app-btn{padding:10px 16px;font-size:14px}.install-app-btn .install-text{display:none}.install-app-btn.large .install-text,.install-app-btn.small .install-text{display:inline}}@media(prefers-contrast:high){.install-app-btn,.install-app-btn.outline{border-width:2px}}