car-interface-android/lib/core/widgets/surface_card.dart

import 'package:flutter/material.dart';

import '../theme/app_colors.dart';

/// The soft paper-like card used for the volume control, shortcuts and
/// settings sections.
class SurfaceCard extends StatelessWidget {
  const SurfaceCard({
    super.key,
    required this.child,
    this.padding = const EdgeInsets.all(24),
    this.radius = 28,
    this.color,
    this.borderColor,
    this.showShadow = true,
    this.onTap,
  });

  final Widget child;
  final EdgeInsetsGeometry padding;
  final double radius;
  final Color? color;
  final Color? borderColor;
  final bool showShadow;
  final VoidCallback? onTap;

  @override
  Widget build(BuildContext context) {
    final colors = context.colors;
    final isDark = Theme.of(context).brightness == Brightness.dark;
    final decoration = BoxDecoration(
      color: color ?? colors.surface,
      borderRadius: BorderRadius.circular(radius),
      border: Border.all(color: borderColor ?? colors.border),
      boxShadow: showShadow
          ? [
              BoxShadow(
                color: colors.shadow.withValues(alpha: isDark ? 0.24 : 0.045),
                blurRadius: isDark ? 28 : 30,
                offset: const Offset(0, 12),
              ),
            ]
          : null,
    );

    final content = Container(
      padding: padding,
      decoration: decoration,
      child: child,
    );

    if (onTap == null) return content;
    return Material(
      color: Colors.transparent,
      child: InkWell(
        onTap: onTap,
        borderRadius: BorderRadius.circular(radius),
        child: content,
      ),
    );
  }
}