/* 全局主题变量 */
:root {
  --primary: #165DFF;
  --dark: #1D2129;
  --light: #F2F3F5;
  --gray: #86909C;
  --border: #E5E6EB;
  --success: #00B42A;
  --error: #F53F3F;
  --card-bg: #FFFFFF;
  --player-bg: #FFFFFF;
  --skeleton-bg: #f0f2f5;
  --spectrum-bg: #f7f8fa;
  --focus-shadow: 0 0 0 2px rgba(22, 93, 255, 0.3); /* 新增：聚焦阴影 */
  --modal-mask: rgba(0, 0, 0, 0.5); /* 新增：弹窗遮罩 */
}

html[data-theme="dark"] {
  --dark: #F2F3F5;
  --light: #1D2129;
  --border: #2E3339;
  --card-bg: #25292E;
  --player-bg: #25292E;
  --skeleton-bg: #2E3339;
  --spectrum-bg: #2E3339;
  --gray: #9DA3AA;
  --modal-mask: rgba(0, 0, 0, 0.7); /* 新增：深色模式遮罩 */
}

html[data-theme="light"] {
  --dark: #1D2129;
  --light: #F2F3F5;
  --border: #E5E6EB;
  --card-bg: #FFFFFF;
  --player-bg: #FFFFFF;
}

html[data-theme="auto"] {
  @media (prefers-color-scheme: dark) {
    --dark: #F2F3F5;
    --light: #1D2129;
    --border: #2E3339;
    --card-bg: #25292E;
    --player-bg: #25292E;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
}

body {
  background-color: var(--light);
  color: var(--dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

/* 主题切换按钮 */
.theme-toggle {
  position: absolute;
  top: 10px;
  left: 20px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--card-bg);
  color: var(--dark);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
}
.theme-toggle:hover, .theme-toggle:focus { /* 新增：聚焦样式 */
  border-color: var(--primary);
  box-shadow: var(--focus-shadow);
  outline: none;
}

/* 错误弹窗样式（新增） */
.error-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-mask);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.error-modal.show {
  display: flex;
}
.error-modal-content {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  width: 100%;
  max-width: 400px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.error-modal-title {
  color: var(--error);
  font-size: 18px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.error-modal-title::before {
  content: "⚠️";
  font-size: 20px;
}
.error-modal-msg {
  color: var(--dark);
  margin-bottom: 20px;
  line-height: 1.6;
}
.error-modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.error-modal-btn {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
  outline: none;
}
.error-modal-btn.retry {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.error-modal-btn.retry:hover, .error-modal-btn.retry:focus {
  background: #0E4BD8;
  box-shadow: var(--focus-shadow);
}
.error-modal-btn.close {
  background: var(--card-bg);
  color: var(--dark);
}
.error-modal-btn.close:hover, .error-modal-btn.close:focus {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--focus-shadow);
}

.browser-tip { 
  display: none; 
  background: var(--error); 
  color: #fff; 
  text-align: center; 
  padding: 12px; 
  position: fixed; 
  top:0; 
  left:0; 
  width:100%; 
  z-index:999; 
}

/* 音频中断恢复提示 */
.audio-resume-tip {
  display: none;
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 8px 16px;
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 8px;
  cursor: pointer;
  z-index: 998;
  transition: all 0.2s;
}
.audio-resume-tip.show {
  display: block;
}
.audio-resume-tip:hover, .audio-resume-tip:focus { /* 新增：聚焦样式 */
  opacity: 0.9;
  box-shadow: var(--focus-shadow);
  outline: none;
}

.header { 
  background: var(--card-bg); 
  border-bottom: 1px solid var(--border); 
  padding:20px; 
  text-align: center; 
  position: relative; 
}
.header-time { 
  position: absolute; 
  top:10px; 
  right:20px; 
  font-size:14px; 
  color:var(--gray); 
}
.header h1 { 
  color: var(--primary); 
  margin-bottom:4px; 
}
.header p { 
  color: var(--gray); 
  font-size:14px; 
}

.container { 
  flex:1; 
  max-width:1200px; 
  margin:0 auto; 
  padding:30px 20px; 
}

.search-box { 
  display: flex; 
  justify-content: center; 
  margin-bottom:30px; 
}
.search-input { 
  width:480px; 
  height:44px; 
  padding:0 16px; 
  border:1px solid var(--border); 
  border-radius:6px; 
  background:var(--card-bg); 
  color:var(--dark);
  outline: none;
}
.search-input:focus { 
  border-color: var(--primary); 
  box-shadow: var(--focus-shadow); /* 新增：聚焦样式 */
}

.player { 
  background: var(--player-bg); 
  border-radius:12px; 
  padding:24px; 
  margin-bottom:30px; 
  border:1px solid var(--border); 
}
.spectrum-canvas { 
  width:100%; 
  height:100px; 
  background:var(--spectrum-bg); 
  border-radius:8px; 
  margin-bottom:20px; 
}
.player-content { 
  display: flex; 
  align-items: center; 
  gap:20px; 
}
.play-btn { 
  width:50px; 
  height:50px; 
  border-radius:50%; 
  background:var(--primary); 
  color:#fff; 
  border:none; 
  font-size:20px; 
  cursor: pointer; 
  outline: none;
}
.play-btn:focus {
  box-shadow: var(--focus-shadow); /* 增强：聚焦样式 */
}

.station-info { 
  flex:1; 
  display: flex; 
  align-items: center; 
  gap:12px; 
}
.player-logo { 
  width:40px; 
  height:40px; 
  border-radius:8px; 
  background:var(--skeleton-bg); 
  display: grid; 
  place-items: center; 
  color:var(--primary); 
  position: relative; 
  overflow: hidden; 
}
.logo-skeleton::before { 
  content:""; 
  position:absolute; 
  top:0; 
  left:-100%; 
  width:100%; 
  height:100%; 
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.2),transparent); 
  animation:skeleton 1.5s infinite; 
}
@keyframes skeleton { 100% { left:100%; } }
.player-logo img { 
  width:100%; 
  height:100%; 
  object-fit:cover; 
  opacity:0; 
  transform:scale(0.95); 
  transition:all 0.3s; 
}
.player-logo img.loaded { 
  opacity:1; 
  transform:scale(1); 
}

.station-text h3 { 
  font-size:18px; 
  white-space: nowrap; 
  overflow: hidden; 
  text-overflow: ellipsis; 
}
.station-text p { 
  font-size:14px; 
  color:var(--gray); 
}
.station-text p.error { 
  color:var(--error); 
}
.station-text p.buffering { 
  color:var(--primary); 
  font-style: italic; 
}

.volume-control { 
  display: flex; 
  align-items: center; 
  gap:8px; 
  width:180px; 
}
.volume-slider { 
  width:100%; 
  height:6px; 
  background:var(--border); 
  border-radius:3px; 
  appearance: none; 
  outline: none;
}
.volume-slider::-webkit-slider-thumb { 
  appearance: none; 
  width:16px; 
  height:16px; 
  border-radius:50%; 
  background:var(--primary);
  cursor: pointer;
}
.volume-slider:focus::-webkit-slider-thumb {
  box-shadow: var(--focus-shadow); /* 增强：聚焦样式 */
}

/* 电台列表 */
.station-grid { 
  display: grid; 
  grid-template-columns: repeat(2, 1fr);
  gap:20px; 
  margin-bottom: 30px;
}
.station-card { 
  background:var(--card-bg); 
  border-radius:10px; 
  padding:20px; 
  border:1px solid var(--border); 
  cursor: pointer; 
  display: flex; 
  align-items: center; 
  gap:12px; 
  transition:all 0.2s;
  outline: none;
  tab-index: 0;
}
/* 增强：聚焦+悬停样式 */
.station-card:hover, .station-card:focus { 
  border-color:var(--primary); 
  transform:translateY(-2px);
  box-shadow: var(--focus-shadow), 0 2px 8px rgba(22, 93, 255, 0.1);
}

.card-logo { 
  width:48px; 
  height:48px; 
  border-radius:8px; 
  background:var(--skeleton-bg); 
  display: grid; 
  place-items: center; 
  color:var(--primary); 
  position: relative; 
  overflow: hidden; 
}
.card-logo img { 
  width:100%; 
  height:100%; 
  object-fit:cover; 
  opacity:0; 
  transform:scale(0.95); 
  transition:all 0.3s; 
}
.card-logo img.loaded { 
  opacity:1; 
  transform:scale(1); 
}

.card-content { 
  flex:1; 
  min-width:0; 
}
.card-content h4 { 
  font-size:16px; 
  white-space: nowrap; 
  overflow: hidden; 
  text-overflow: ellipsis; 
}
.card-listener { 
  font-size:12px; 
  color:var(--primary); 
  margin-left:6px; 
}
.card-content p { 
  font-size:13px; 
  color:var(--gray); 
}

/* 分页样式增强 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin: 20px 0;
  /* 默认显示，无限滚动开启时隐藏 */
}
.pagination.hidden {
  display: none;
}
.pagination-btn {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--dark);
  cursor: pointer;
  transition: all 0.2s;
  outline: none;
}
.pagination-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}
.pagination-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}
.pagination-btn:focus {
  box-shadow: var(--focus-shadow); /* 增强：聚焦样式 */
}
.page-num {
  padding: 0 10px;
  color: var(--primary);
  font-weight: 600;
}
.back-top-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  outline: none;
}
.back-top-btn.show {
  display: flex;
}
.back-top-btn:hover, .back-top-btn:focus { /* 新增：聚焦样式 */
  opacity: 0.9;
  box-shadow: var(--focus-shadow);
}

/* 无限滚动开关 */
.infinite-scroll-switch {
  text-align: center;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--gray);
}
.infinite-scroll-switch label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}
.infinite-scroll-switch input {
  accent-color: var(--primary);
  outline: none; /* 优化：移除默认轮廓 */
}

.footer { 
  background:var(--card-bg); 
  border-top:1px solid var(--border); 
  padding:20px; 
  text-align: center; 
  color:var(--gray); 
  margin-top:30px; 
}
.loading { 
  display: flex; 
  justify-content: center; 
  padding:20px; 
  color:var(--gray); 
  grid-column:1/-1; 
}

/* 响应式 */
@media (max-width:768px) {
  .player-content { flex-direction: column; }
  .station-grid { grid-template-columns: 1fr; }
  .search-input { width:100%; }
  .pagination {
    flex-wrap: wrap;
  }
  .back-top-btn {
    bottom: 70px;
  }
  .audio-resume-tip {
    width: 90%;
  }
  .error-modal-content {
    max-width: 90%;
  }
}