// 暖记阴影系统 — soft / medium / float
// 对齐 spec §1 阴影 token:
//   --elev-soft:   0 2px 12px rgba(45,36,32,0.06)
//   --elev-medium: 0 4px 20px rgba(45,36,32,0.08)
//   --elev-float:  0 8px 32px rgba(45,36,32,0.12)

import 'package:flutter/material.dart';

class AppShadows {
  AppShadows._();

  /// 柔和阴影 — 卡片默认
  static List<BoxShadow> soft(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;
    return [
      BoxShadow(
        color: isDark
            ? Colors.black.withValues(alpha: 0.3)
            : const Color(0xFF2D2420).withValues(alpha: 0.06),
        offset: const Offset(0, 2),
        blurRadius: 12,
      ),
    ];
  }

  /// 中等阴影 — 浮动元素、FAB
  static List<BoxShadow> medium(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;
    return [
      BoxShadow(
        color: isDark
            ? Colors.black.withValues(alpha: 0.4)
            : const Color(0xFF2D2420).withValues(alpha: 0.08),
        offset: const Offset(0, 4),
        blurRadius: 20,
      ),
    ];
  }

  /// 浮动阴影 — 弹窗、底部面板
  static List<BoxShadow> floating(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;
    return [
      BoxShadow(
        color: isDark
            ? Colors.black.withValues(alpha: 0.5)
            : const Color(0xFF2D2420).withValues(alpha: 0.12),
        offset: const Offset(0, 8),
        blurRadius: 32,
      ),
    ];
  }
}