/* ╔══════════════════════════════════════════╗
   ║     MyNav - 极简现代风格样式表             ║
   ╚══════════════════════════════════════════╝ */

/* ===== CSS 变量（主题系统） ===== */
:root {
  --bg: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #f1f5f9;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-subtle: rgba(99, 102, 241, 0.08);
  --border: rgba(0, 0, 0, 0.06);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.06), 0 4px 10px rgba(0, 0, 0, 0.03);
  --shadow-search: 0 4px 24px rgba(99, 102, 241, 0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 深色主题 ===== */
[data-theme="dark"] {
  --bg: #0a0a0f;
  --bg-card: #141420;
  --bg-card-hover: #1a1a2a;
  --bg-input: #1a1a2a;
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-subtle: rgba(129, 140, 248, 0.1);
  --border: rgba(255, 255, 255, 0.06);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  --shadow-search: 0 4px 24px rgba(129, 140, 248, 0.12);
  /* 股票涨跌色（深色模式下适当调亮） */
  --stock-up: #fc8181;
  --stock-down: #68d391;
}

/* ===== 全局重置 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont,
    'Segoe UI', 'PingFang SC', 'Microsoft YaHei',
    'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  transition: background var(--transition), color var(--transition);
}

/* ===== 背景装饰 ===== */
.bg-decoration {
  position: fixed;
  top: -30%;
  right: -15%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle at center, var(--accent-subtle) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* ===== 粒子星空动态背景 ===== */
.bg-starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  display: block;
}

/* 关闭动态背景 */
body.bg-anim-off .bg-starfield {
  display: none;
}

/* ===== 动态背景开关 ===== */
.bg-anim-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.bg-anim-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 22px;
  flex-shrink: 0;
  cursor: pointer;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 22px;
  transition: background var(--transition);
}

.switch-slider::before {
  content: '';
  position: absolute;
  height: 16px;
  width: 16px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

.switch input:checked + .switch-slider {
  background: var(--accent);
}

.switch input:checked + .switch-slider::before {
  transform: translateX(16px);
}

/* 尊重系统「减少动态效果」偏好（星空动画由 JS 读取 matchMedia 自行降级） */

/* ===== 自定义背景图 ===== */
body.has-custom-bg {
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  background-repeat: no-repeat;
}

/* 有自定义背景时隐藏默认装饰与动态背景 */
body.has-custom-bg .bg-decoration,
body.has-custom-bg .bg-starfield {
  display: none;
}

/* ===== 容器 ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  position: relative;
  z-index: 100;
}

/* ===== 页头 ===== */
.header {
  margin-bottom: 40px;
  position: relative;
  /* 必须显式 z-index：因为 animation 终态 transform: translateY(0) 会创建
     stacking context（z=auto=0），导致 DOM 顺序在后的 .links-grid /
     .stock-section 反而绘制在 .header 之上，遮挡里面的弹窗。 */
  z-index: 10;
  animation: fadeInUp 0.5s ease both;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}

.greeting {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2px;
  line-height: 1.2;
}

.datetime {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.clock {
  font-size: 1.375rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.date {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===== 主题切换按钮 ===== */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: scale(1.06);
}

.theme-toggle:active {
  transform: scale(0.96);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

/* 根据主题显示/隐藏对应图标 */
[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"]  .icon-sun  { display: none; }

/* ===== 设置按钮 ===== */
.header-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
  position: relative;
}

.settings-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
  box-shadow: var(--shadow);
  font-size: 1rem;
  line-height: 1;
}

.settings-toggle:hover {
  color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: scale(1.06);
}

.settings-toggle:active {
  transform: scale(0.96);
}

/* ===== 设置面板 ===== */
.settings-panel {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  width: 320px;
  display: none;
  animation: fadeInUp 0.2s ease both;
}

.settings-panel.show {
  display: block;
}

.settings-panel h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.bg-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.bg-option {
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.bg-option:hover {
  transform: scale(1.05);
  border-color: var(--accent);
}

.bg-option.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.bg-option.active::after {
  content: '✓';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  background: var(--accent);
  color: #fff;
  font-size: 0.625rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bg-option-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 4px 6px;
  font-size: 0.625rem;
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 预设背景预览色块 */
.bg-preset-default { background: linear-gradient(135deg, #e0e7ff 0%, #f1f5f9 50%, #fce7f3 100%); }
.bg-preset-plain   { background: #f1f5f9; }
.bg-preset-ocean   { background: linear-gradient(135deg, #dbeafe 0%, #e0e7ff 50%, #d1fae5 100%); }
.bg-preset-sunset  { background: linear-gradient(135deg, #fef3c7 0%, #fce7f3 50%, #ede9fe 100%); }
.bg-preset-forest  { background: linear-gradient(135deg, #d1fae5 0%, #e0e7ff 50%, #dbeafe 100%); }
.bg-preset-dusk    { background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%); }

/* 图片预设背景 - 缩略图预览 */
.bg-img-hongkong { background-image: url('assets/hongkong.jpg'); }
.bg-img-hanfu    { background-image: url('assets/hanfu.jpg'); }
.bg-img-peony    { background-image: url('assets/peony.jpg'); }
.bg-img-polka    { background-image: url('assets/polka.jpg'); }
.bg-img-emerald  { background-image: url('assets/emerald.jpg'); }

/* 暗色模式下的预设背景 */
[data-theme="dark"] .bg-preset-default { background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%); }
[data-theme="dark"] .bg-preset-plain   { background: #0a0a0f; }
[data-theme="dark"] .bg-preset-ocean   { background: linear-gradient(135deg, #0c1929 0%, #0f0f23 50%, #0a1c1a 100%); }
[data-theme="dark"] .bg-preset-sunset  { background: linear-gradient(135deg, #1a1020 0%, #2a1a3a 50%, #0f0f23 100%); }
[data-theme="dark"] .bg-preset-forest  { background: linear-gradient(135deg, #0a1c1a 0%, #0f0f23 50%, #0c1929 100%); }
[data-theme="dark"] .bg-preset-dusk    { background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%); }

/* 自定义URL输入 */
.bg-custom-row {
  display: flex;
  gap: 8px;
}

.bg-custom-row input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 0.8125rem;
  background: var(--bg);
  color: var(--text);
  outline: none;
  font-family: inherit;
  transition: border-color var(--transition);
}

.bg-custom-row input:focus {
  border-color: var(--accent);
}

.bg-custom-row input::placeholder {
  color: var(--text-muted);
}

.bg-custom-row button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
  transition: background var(--transition);
}

.bg-custom-row button:hover {
  background: var(--accent-hover);
}

/* 清除自定义背景 */
.bg-clear-btn {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px dashed var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}

.bg-clear-btn:hover {
  color: #e53e3e;
  border-color: #e53e3e;
  background: rgba(229, 62, 62, 0.05);
}

/* 上传按钮 */
.bg-upload-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 7px 10px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-subtle);
  border: 1px dashed var(--accent);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
  text-align: center;
}

.bg-upload-btn:hover {
  background: var(--accent);
  color: #fff;
  border-style: solid;
}

/* ===== 搜索区域 ===== */
.search-section {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 10px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), border-color var(--transition);
}

[data-theme="dark"] .search-section {
  background: rgba(20, 20, 32, 0.55);
}

.search-section:focus-within {
  box-shadow: var(--shadow-search);
  border-color: var(--accent);
}

/* 搜索引擎标签 */
.search-engines {
  display: flex;
  gap: 2px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.engine-tab {
  padding: 5px 14px;
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  background: transparent;
  font-family: inherit;
  white-space: nowrap;
}

.engine-tab:hover {
  background: var(--bg);
  color: var(--text);
}

.engine-tab.active {
  background: var(--accent);
  color: #fff;
}

/* 搜索框 */
.search-bar {
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-bar input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1rem;
  color: var(--text);
  outline: none;
  padding: 6px 4px;
  font-family: inherit;
  min-width: 0;
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.search-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-xs);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.search-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.06);
}

.search-btn svg {
  width: 18px;
  height: 18px;
}

/* ===== 链接网格 ===== */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  animation: fadeInUp 0.5s ease 0.1s both;
}

/* ===== 分类卡片 ===== */
.category-card {
  background: rgba(255, 255, 255, 0.55);  /* 55% 不透明，透出一点背景图 */
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  animation: fadeInUp 0.4s ease both;
}

[data-theme="dark"] .category-card {
  background: rgba(20, 20, 32, 0.55);
}

.category-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* 分类标题 */
.category-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.category-icon {
  font-size: 1.125rem;
  line-height: 1;
}

.category-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
}

.category-count {
  margin-left: auto;
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: 1px 7px;
  border-radius: 10px;
  font-weight: 500;
}

/* ===== 链接列表 ===== */
.link-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.link-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--radius-xs);
  text-decoration: none;
  color: var(--text-secondary);
  transition: all var(--transition);
  font-size: 0.875rem;
}

.link-item:hover {
  background: var(--bg);
  color: var(--text);
  transform: translateX(2px);
}

/* 链接图标 */
.link-icon {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.link-icon img {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  position: relative;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.link-icon img.loaded {
  opacity: 1;
}

.link-letter {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 800;
  color: #fff;
  border-radius: 4px;
  text-transform: uppercase;
}

.link-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== 股票行情模块 ===== */
.stock-section {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-top: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  animation: fadeInUp 0.5s ease 0.42s both;
}

[data-theme="dark"] .stock-section {
  background: rgba(20, 20, 32, 0.55);
}

.stock-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.stock-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.stock-tabs {
  display: flex;
  gap: 2px;
}

.stock-tab {
  padding: 3px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  background: transparent;
  font-family: inherit;
  white-space: nowrap;
}

.stock-tab:hover {
  color: var(--text);
  background: var(--bg);
}

.stock-tab.active {
  background: var(--accent);
  color: #fff;
}

.stock-time {
  margin-left: auto;
  font-size: 0.675rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.stock-indices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  min-height: 42px;
}

.stock-loading {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  padding: 8px 0;
}

.stock-index {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  border-radius: var(--radius-xs);
  background: transparent;  /* 默认无背景（对齐分类链接交互：悬停才显示） */
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  min-width: 0;
}

/* 悬停才显示背景（浅色 50% 半透） */
.stock-index:hover {
  background: rgba(241, 245, 249, 0.8);
  transform: translateY(-1px);
}

/* 悬停背景（深色 50% 半透） */
[data-theme="dark"] .stock-index:hover {
  background: rgba(10, 10, 15, 0.8);
}

.stock-index-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stock-index-price {
  font-size: 1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  letter-spacing: -0.01em;
}

.stock-index-change {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* 涨（中国股市惯例：红色） */
.stock-up .stock-index-price,
.stock-up .stock-index-change {
  color: var(--stock-up, #e53e3e);
}

/* 跌（中国股市惯例：绿色） */
.stock-down .stock-index-price,
.stock-down .stock-index-change {
  color: var(--stock-down, #38a169);
}

/* 平盘 */
.stock-flat .stock-index-price,
.stock-flat .stock-index-change {
  color: var(--text-secondary);
}

/* ===== 底部 ===== */
.footer {
  text-align: center;
  margin-top: 48px;
  padding: 16px 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
  animation: fadeInUp 0.5s ease 0.2s both;
}

.footer kbd {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.75rem;
  font-family: inherit;
  box-shadow: 0 1px 0 var(--border);
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 卡片依次出现的延迟 */
.category-card:nth-child(1) { animation-delay: 0.05s; }
.category-card:nth-child(2) { animation-delay: 0.1s; }
.category-card:nth-child(3) { animation-delay: 0.15s; }
.category-card:nth-child(4) { animation-delay: 0.2s; }
.category-card:nth-child(5) { animation-delay: 0.25s; }
.category-card:nth-child(6) { animation-delay: 0.3s; }
.category-card:nth-child(7) { animation-delay: 0.35s; }
.category-card:nth-child(8) { animation-delay: 0.4s; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .container {
    padding: 32px 16px 24px;
  }

  .greeting {
    font-size: 1.625rem;
  }

  .clock {
    font-size: 1.125rem;
  }

  .links-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }

  .search-section {
    padding: 12px 14px 8px;
  }

}

@media (max-width: 480px) {
  .container {
    padding: 20px 12px 16px;
  }

  .greeting {
    font-size: 1.375rem;
  }

  .clock {
    font-size: 1rem;
  }

  .links-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .link-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .header {
    margin-bottom: 28px;
  }

  .search-engines {
    gap: 1px;
  }

  .engine-tab {
    padding: 4px 10px;
    font-size: 0.75rem;
  }
}