/* ============================================
   PVZ Tools - Material You 主题样式
   设计风格：安卓15 Material Design 3
   主题色：PVZ 绿色系
   ============================================ */

/* ---------- 设计令牌 (Design Tokens) ---------- */
:root {
  /* 主色 - PVZ 绿 */
  --md-primary: #2E7D32;
  --md-on-primary: #FFFFFF;
  --md-primary-container: #C8E6C9;
  --md-on-primary-container: #003300;

  /* 次级色 - 向日葵橙 */
  --md-secondary: #F57C00;
  --md-on-secondary: #FFFFFF;
  --md-secondary-container: #FFE0B2;
  --md-on-secondary-container: #231900;

  /* 中性色 */
  --md-surface: #FAFCFA;
  --md-surface-variant: #E8F5E9;
  --md-on-surface: #1A1C19;
  --md-on-surface-variant: #414941;
  --md-outline: #717971;
  --md-outline-variant: #C1C9C1;

  /* 背景 */
  --md-background: #F5F7F5;

  /* 圆角 - Material 3 标准 */
  --md-radius-xs: 8px;
  --md-radius-sm: 12px;
  --md-radius-md: 16px;
  --md-radius-lg: 20px;
  --md-radius-xl: 28px;
  --md-radius-full: 9999px;

  /* 阴影 - Material 3 柔和阴影 */
  --md-shadow-1: 0 1px 2px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.08);
  --md-shadow-2: 0 1px 4px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.08);
  --md-shadow-3: 0 4px 8px rgba(0,0,0,0.07), 0 8px 16px rgba(0,0,0,0.08);

  /* 间距 */
  --md-space-1: 4px;
  --md-space-2: 8px;
  --md-space-3: 12px;
  --md-space-4: 16px;
  --md-space-5: 20px;
  --md-space-6: 24px;
  --md-space-8: 32px;

  /* 过渡 */
  --md-transition: 200ms cubic-bezier(0.2, 0, 0, 1);
}

/* ---------- 全局重置 ---------- */
* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--md-background);
  color: var(--md-on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--md-outline-variant);
  border-radius: var(--md-radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--md-outline);
}

/* ---------- 卡片组件 ---------- */
.md-card {
  background: var(--md-surface);
  border-radius: var(--md-radius-lg);
  box-shadow: var(--md-shadow-1);
  overflow: hidden;
  transition: box-shadow var(--md-transition);
}
.md-card:hover {
  box-shadow: var(--md-shadow-2);
}

/* ---------- 按钮组件 ---------- */
.md-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--md-radius-full);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--md-transition);
  text-decoration: none;
  user-select: none;
}

/* 填充按钮 */
.md-btn-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: var(--md-shadow-1);
}
.md-btn-filled:hover {
  background: #1B5E20;
  box-shadow: var(--md-shadow-2);
}
.md-btn-filled:active {
  box-shadow: var(--md-shadow-1);
  transform: scale(0.98);
}

/* 轮廓按钮 */
.md-btn-outlined {
  background: transparent;
  color: var(--md-primary);
  border: 1px solid var(--md-outline);
}
.md-btn-outlined:hover {
  background: rgba(46, 125, 50, 0.08);
  border-color: var(--md-primary);
}

/* 文字按钮 */
.md-btn-text {
  background: transparent;
  color: var(--md-primary);
  padding: 10px 16px;
}
.md-btn-text:hover {
  background: rgba(46, 125, 50, 0.08);
}

/* ---------- 输入框组件 ---------- */
.md-input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-radius-md);
  font-size: 15px;
  background: var(--md-surface);
  color: var(--md-on-surface);
  transition: all var(--md-transition);
  outline: none;
}
.md-input:focus {
  border-color: var(--md-primary);
  border-width: 2px;
  padding: 13px 15px;
  box-shadow: 0 0 0 4px rgba(46, 125, 50, 0.12);
}
.md-input::placeholder {
  color: var(--md-on-surface-variant);
  opacity: 0.7;
}

/* ---------- 顶部导航栏 ---------- */
.md-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--md-surface);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--md-shadow-1);
}
.md-topbar-title {
  font-size: 20px;
  font-weight: 500;
  flex: 1;
}

/* ---------- 底部导航栏 ---------- */
.md-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--md-surface);
  display: flex;
  justify-content: space-around;
  padding: 8px 0;
  padding-bottom: max(8px, env(safe-area-inset-bottom));
  box-shadow: 0 -1px 3px rgba(0,0,0,0.05), 0 -1px 8px rgba(0,0,0,0.04);
  z-index: 100;
}
.md-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 16px;
  border-radius: var(--md-radius-md);
  color: var(--md-on-surface-variant);
  font-size: 12px;
  text-decoration: none;
  transition: all var(--md-transition);
  cursor: pointer;
}
.md-nav-item.active {
  color: var(--md-primary);
  background: var(--md-primary-container);
}
.md-nav-item img {
  width: 24px;
  height: 24px;
  opacity: 0.8;
}
.md-nav-item.active img {
  opacity: 1;
}

/* ---------- 列表项 ---------- */
.md-list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--md-surface);
  border-bottom: 1px solid var(--md-outline-variant);
  transition: background var(--md-transition);
  cursor: pointer;
}
.md-list-item:hover {
  background: var(--md-surface-variant);
}
.md-list-item:last-child {
  border-bottom: none;
}

/* ---------- 标签/Chip ---------- */
.md-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--md-radius-full);
  background: var(--md-surface-variant);
  color: var(--md-on-surface-variant);
  font-size: 13px;
}

/* ---------- 工具页面通用布局 ---------- */
.tool-page {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px 16px;
  padding-bottom: 40px;
}
.tool-page-header {
  margin-bottom: 24px;
}
.tool-page-title {
  font-size: 28px;
  font-weight: 400;
  color: var(--md-on-surface);
  margin-bottom: 8px;
}
.tool-page-desc {
  font-size: 14px;
  color: var(--md-on-surface-variant);
}
.tool-section {
  background: var(--md-surface);
  border-radius: var(--md-radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--md-shadow-1);
}
.tool-section-title {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 16px;
  color: var(--md-on-surface);
}

/* ---------- 返回按钮 ---------- */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--md-radius-full);
  color: var(--md-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: background var(--md-transition);
  margin-bottom: 16px;
}
.back-btn:hover {
  background: rgba(46, 125, 50, 0.08);
}

/* ---------- 响应式适配 ---------- */
@media (max-width: 480px) {
  .tool-page {
    padding: 16px 12px;
  }
  .tool-page-title {
    font-size: 24px;
  }
  .tool-section {
    padding: 16px;
    border-radius: var(--md-radius-md);
  }
}

/* ---------- 动画 ---------- */
@keyframes md-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.md-fade-in {
  animation: md-fade-in 0.3s ease-out;
}

/* ---------- 通用元素美化（自动生效） ---------- */
/* 按钮 */
button, input[type="button"], input[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--md-radius-full);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--md-transition);
  background: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: var(--md-shadow-1);
  font-family: inherit;
}
button:hover, input[type="button"]:hover, input[type="submit"]:hover {
  background: #1B5E20;
  box-shadow: var(--md-shadow-2);
}
button:active, input[type="button"]:active, input[type="submit"]:active {
  transform: scale(0.98);
}

/* 输入框 */
input[type="text"], input[type="number"], input[type="password"],
input[type="email"], input[type="search"], textarea, select {
  padding: 12px 14px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-radius-md);
  font-size: 14px;
  background: var(--md-surface);
  color: var(--md-on-surface);
  transition: all var(--md-transition);
  outline: none;
  font-family: inherit;
}
input[type="text"]:focus, input[type="number"]:focus, input[type="password"]:focus,
input[type="email"]:focus, input[type="search"]:focus, textarea:focus, select:focus {
  border-color: var(--md-primary);
  border-width: 2px;
  padding: 11px 13px;
  box-shadow: 0 0 0 4px rgba(46, 125, 50, 0.12);
}
textarea {
  resize: vertical;
  line-height: 1.5;
}

/* 链接 */
a {
  color: var(--md-primary);
  transition: color var(--md-transition);
}
a:hover {
  color: #1B5E20;
}

/* 表格 */
table {
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--md-radius-md);
  overflow: hidden;
  box-shadow: var(--md-shadow-1);
}
th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--md-outline-variant);
}
th {
  background: var(--md-surface-variant);
  font-weight: 500;
}
tr:last-child td {
  border-bottom: none;
}

/* 代码块 */
code, pre {
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  background: var(--md-surface-variant);
  border-radius: var(--md-radius-xs);
}
code {
  padding: 2px 6px;
  font-size: 0.9em;
}
pre {
  padding: 16px;
  border-radius: var(--md-radius-md);
  overflow-x: auto;
}

/* 分割线 */
hr {
  border: none;
  height: 1px;
  background: var(--md-outline-variant);
  margin: 16px 0;
}