/* ========================================
 * 白噪音合成器 - 参照 Ambiphone 交互模式
 * 点击卡片开关声音，开启后显示音量滑块
 * ======================================== */

.white-noise-app {
  max-width: 800px;
  margin: 0 auto;
}

/* ---- 搜索框 ---- */
.noise-search {
  position: relative;
  margin-bottom: 28px;
}

.noise-search input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border-radius: 10px;
  border: 1px solid var(--line-color, #eaecef);
  background: var(--board-color, #fff);
  color: var(--text-color, #3c4858);
  font-size: 15px;
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  box-sizing: border-box;
}

.noise-search input::placeholder {
  color: var(--sec-text-color, #718096);
}

.noise-search input:focus {
  border-color: var(--link-hover-color, #30a9de);
  box-shadow: 0 0 0 3px rgba(48, 169, 222, 0.15);
}

.noise-search__icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--sec-text-color, #718096);
  font-size: 18px;
  pointer-events: none;
}

/* ---- 分类 ---- */
.noise-category {
  margin-bottom: 32px;
}

.noise-category.hidden {
  display: none;
}

.category-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--post-heading-color, #1a202c);
  margin-bottom: 16px;
  padding-left: 4px;
}

.category-notice {
  font-size: 13px;
  color: var(--post-text-color, #718096);
  background: var(--post-bg-color, #f7fafc);
  border: 1px solid var(--post-border-color, #e2e8f0);
  border-radius: 8px;
  padding: 8px 14px;
  margin-bottom: 16px;
  line-height: 1.6;
}

/* ---- 声音网格 ---- */
.noise-channels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

/* ---- 声音卡片 ---- */
.noise-channel {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 12px 16px;
  border-radius: 14px;
  background: var(--board-color, #fff);
  border: 2px solid var(--line-color, #eaecef);
  cursor: pointer;
  user-select: none;
  transition: all 0.25s ease;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

.noise-channel:hover {
  border-color: var(--link-hover-color, #30a9de);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

/* 激活状态 */
.noise-channel.active {
  border-color: var(--link-hover-color, #30a9de);
  background: linear-gradient(135deg, rgba(48,169,222,0.08), rgba(3,102,214,0.05));
  box-shadow: 0 4px 20px rgba(48, 169, 222, 0.15);
}

.noise-channel.active .channel-icon {
  color: var(--link-hover-color, #30a9de);
}

.noise-channel.hidden {
  display: none;
}

/* 图标 */
.channel-icon {
  font-size: 36px;
  color: var(--sec-text-color, #718096);
  margin-bottom: 8px;
  transition: color 0.25s ease;
}

/* 名称 */
.channel-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--post-heading-color, #1a202c);
  text-align: center;
  line-height: 1.3;
  transition: color 0.25s ease;
}

/* 音量区域（默认隐藏） */
.channel-volume-area {
  width: 100%;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line-color, #eaecef);
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

.noise-channel:hover .channel-volume-area,
.noise-channel.active .channel-volume-area {
  opacity: 1;
  max-height: 60px;
  padding-top: 10px;
}

/* 滑块 */
.channel-slider {
  width: 100%;
  height: 5px;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 3px;
  background: var(--line-color, #eaecef);
  outline: none;
  cursor: pointer;
}

.channel-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--link-hover-color, #30a9de);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.channel-slider::-webkit-slider-thumb:hover {
  transform: scale(1.25);
  box-shadow: 0 2px 8px rgba(48,169,222,0.4);
}

.channel-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--link-hover-color, #30a9de);
  cursor: pointer;
  border: none;
}

/* ---- 底部控制栏 ---- */
.noise-controls {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--board-color, #fff);
  border-top: 1px solid var(--line-color, #eaecef);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
  z-index: 100;
  transform: translateY(100%);
  transition: transform 0.35s ease;
}

.noise-controls.visible {
  transform: translateY(0);
}

.noise-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--line-color, #eaecef);
  background: var(--board-color, #fff);
  color: var(--text-color, #3c4858);
  transition: all 0.2s ease;
}

.noise-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.noise-btn-stop {
  color: #e74c3c;
  border-color: #e74c3c;
}

.noise-btn-stop:hover {
  background: #e74c3c;
  color: #fff;
}

.noise-btn-reset:hover {
  border-color: var(--link-hover-color, #30a9de);
  color: var(--link-hover-color, #30a9de);
}

/* 活跃通道计数 */
.active-count {
  font-size: 13px;
  color: var(--sec-text-color, #718096);
  margin-right: 8px;
}

/* ---- 暗色模式 ---- */
[data-user-color-scheme="dark"] .noise-search input {
  background: var(--board-color, #252d38);
  border-color: var(--line-color, #435266);
  color: var(--text-color, #c4c6c9);
}

[data-user-color-scheme="dark"] .category-title {
  color: var(--post-heading-color, #c4c6c9);
}

[data-user-color-scheme="dark"] .category-notice {
  color: var(--sec-text-color, #a7a9ad);
  background: var(--board-color, #252d38);
  border-color: var(--line-color, #435266);
}

[data-user-color-scheme="dark"] .noise-channel {
  background: var(--board-color, #252d38);
  border-color: var(--line-color, #435266);
}

[data-user-color-scheme="dark"] .noise-channel:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

[data-user-color-scheme="dark"] .noise-channel.active {
  border-color: var(--link-hover-color, #30a9de);
  background: linear-gradient(135deg, rgba(48,169,222,0.12), rgba(21,137,233,0.06));
  box-shadow: 0 4px 20px rgba(48, 169, 222, 0.2);
}

[data-user-color-scheme="dark"] .channel-icon {
  color: var(--sec-text-color, #a7a9ad);
}

[data-user-color-scheme="dark"] .noise-channel.active .channel-icon {
  color: var(--link-hover-color, #30a9de);
}

[data-user-color-scheme="dark"] .channel-name {
  color: var(--post-heading-color, #c4c6c9);
}

[data-user-color-scheme="dark"] .channel-volume-area {
  border-top-color: var(--line-color, #435266);
}

[data-user-color-scheme="dark"] .noise-controls {
  background: var(--board-color, #252d38);
  border-top-color: var(--line-color, #435266);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

[data-user-color-scheme="dark"] .noise-btn {
  background: var(--board-color, #252d38);
  border-color: var(--line-color, #435266);
  color: var(--text-color, #c4c6c9);
}

/* ---- 响应式 ---- */
@media (max-width: 768px) {
  .noise-channels {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }
  .noise-channel {
    padding: 16px 8px 12px;
  }
  .channel-icon {
    font-size: 28px;
  }
  .channel-name {
    font-size: 12px;
  }
}

@media (max-width: 576px) {
  .noise-channels {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .noise-channel {
    padding: 14px 6px 10px;
    border-radius: 10px;
  }
  .channel-icon {
    font-size: 24px;
  }
  .channel-name {
    font-size: 11px;
  }
  .noise-controls {
    gap: 8px;
    padding: 10px 12px;
  }
  .noise-btn {
    padding: 6px 14px;
    font-size: 12px;
  }
}