/* ========== 导航栏设置按钮 ========== */
#settings-menu {
  display: inline;
  padding: 0 0 0 14px;
}
#settings-menu .site-page {
  cursor: pointer;
}
#nav.hide-menu #settings-menu {
  display: none;
}

/* ========== 设置面板遮罩层 ========== */
#settings-overlay {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9998;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
#settings-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ========== 设置面板主体 ========== */
#settings-panel {
  position: fixed;
  top: 0;
  right: -420px;
  z-index: 9999;
  width: 400px;
  max-width: 90vw;
  height: 100vh;
  background: var(--card-bg, #fff);
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
  transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--global-font-family, 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif);
}
#settings-panel.active {
  right: 0;
}

/* 面板头部 */
#settings-panel .settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--light-grey, #eee);
  flex-shrink: 0;
}
#settings-panel .settings-header .settings-title {
  font-size: 1.15em;
  font-weight: 600;
  color: var(--font-color, #1F2D3D);
  display: flex;
  align-items: center;
  gap: 8px;
}
#settings-panel .settings-header .settings-title i {
  color: #49B1F5;
  font-size: 1.1em;
}
#settings-panel .settings-header .settings-close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--font-color, #1F2D3D);
  font-size: 1.2em;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}
#settings-panel .settings-header .settings-close:hover {
  background: rgba(73, 177, 245, 0.1);
  color: #49B1F5;
}

/* 面板内容区 */
#settings-panel .settings-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
  scroll-behavior: smooth;
}
#settings-panel .settings-body::-webkit-scrollbar {
  width: 5px;
}
#settings-panel .settings-body::-webkit-scrollbar-thumb {
  background: #49B1F5;
  border-radius: 3px;
}
#settings-panel .settings-body::-webkit-scrollbar-track {
  background: transparent;
}

/* 设置分组 */
#settings-panel .settings-group {
  margin-bottom: 20px;
}
#settings-panel .settings-group-title {
  font-size: 0.85em;
  font-weight: 600;
  color: #49B1F5;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid rgba(73, 177, 245, 0.2);
  display: flex;
  align-items: center;
  gap: 6px;
}
#settings-panel .settings-group-title i {
  font-size: 0.9em;
}

/* 设置项 */
#settings-panel .setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.06);
}
#settings-panel .setting-item:last-child {
  border-bottom: none;
}
#settings-panel .setting-label {
  font-size: 0.92em;
  color: var(--font-color, #1F2D3D);
  flex-shrink: 0;
  margin-right: 12px;
}
#settings-panel .setting-control {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 滑块样式 */
#settings-panel input[type="range"] {
  -webkit-appearance: none;
  width: 100px;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, #49B1F5, #a0d8f8);
  outline: none;
  cursor: pointer;
}
#settings-panel input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #49B1F5;
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  transition: transform 0.15s ease;
}
#settings-panel input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
#settings-panel .range-value {
  font-size: 0.82em;
  color: #49B1F5;
  min-width: 36px;
  text-align: center;
  font-weight: 500;
}

/* 颜色选择器 */
#settings-panel input[type="color"] {
  -webkit-appearance: none;
  width: 32px;
  height: 32px;
  border: 2px solid var(--light-grey, #eee);
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  background: transparent;
  transition: border-color 0.2s ease;
}
#settings-panel input[type="color"]:hover {
  border-color: #49B1F5;
}
#settings-panel input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}
#settings-panel input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 50%;
}

/* 开关按钮 */
#settings-panel .toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
#settings-panel .toggle-switch input {
  display: none;
}
#settings-panel .toggle-slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #ccc;
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.3s ease;
}
#settings-panel .toggle-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}
#settings-panel .toggle-switch input:checked + .toggle-slider {
  background: #49B1F5;
}
#settings-panel .toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* 背景样式选择 - 按钮组 */
#settings-panel .bg-style-btns {
  display: flex;
  gap: 6px;
}
#settings-panel .bg-style-btn {
  padding: 4px 12px;
  border: 1.5px solid var(--light-grey, #ddd);
  border-radius: 16px;
  background: transparent;
  color: var(--font-color, #1F2D3D);
  font-size: 0.82em;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
#settings-panel .bg-style-btn:hover {
  border-color: #49B1F5;
  color: #49B1F5;
}
#settings-panel .bg-style-btn.active {
  background: #49B1F5;
  border-color: #49B1F5;
  color: #fff;
}

/* 自定义背景URL输入 */
#settings-panel .custom-bg-input {
  width: 100%;
  padding: 6px 10px;
  border: 1.5px solid var(--light-grey, #ddd);
  border-radius: 8px;
  font-size: 0.85em;
  color: var(--font-color, #1F2D3D);
  background: var(--card-bg, #fff);
  outline: none;
  transition: border-color 0.2s ease;
  margin-top: 6px;
}
#settings-panel .custom-bg-input:focus {
  border-color: #49B1F5;
}
#settings-panel .custom-bg-input::placeholder {
  color: #aaa;
}

/* 纯色背景颜色选择器行 */
#settings-panel .solid-color-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}
#settings-panel .solid-color-row span {
  font-size: 0.82em;
  color: var(--font-color, #1F2D3D);
}

/* 面板底部 */
#settings-panel .settings-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--light-grey, #eee);
  flex-shrink: 0;
  display: flex;
  gap: 10px;
}
#settings-panel .settings-footer button {
  flex: 1;
  padding: 8px 0;
  border: none;
  border-radius: 8px;
  font-size: 0.9em;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
#settings-panel .btn-reset {
  background: rgba(73, 177, 245, 0.1);
  color: #49B1F5;
  border: 1.5px solid rgba(73, 177, 245, 0.3);
}
#settings-panel .btn-reset:hover {
  background: rgba(73, 177, 245, 0.2);
  border-color: #49B1F5;
}
#settings-panel .btn-save {
  background: #49B1F5;
  color: #fff;
}
#settings-panel .btn-save:hover {
  background: #3a9ee0;
  box-shadow: 0 2px 8px rgba(73, 177, 245, 0.35);
}

/* 暗色模式适配 */
[data-theme="dark"] #settings-panel {
  background: #1e1e22;
}
[data-theme="dark"] #settings-panel .settings-header {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] #settings-panel .settings-footer {
  border-top-color: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] #settings-panel .setting-item {
  border-bottom-color: rgba(255, 255, 255, 0.05);
}
[data-theme="dark"] #settings-panel .bg-style-btn {
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--light-grey, #cacaca);
}
[data-theme="dark"] #settings-panel .bg-style-btn.active {
  background: #49B1F5;
  border-color: #49B1F5;
  color: #fff;
}
[data-theme="dark"] #settings-panel .custom-bg-input {
  border-color: rgba(255, 255, 255, 0.12);
  background: #2a2a30;
  color: var(--light-grey, #cacaca);
}
[data-theme="dark"] #settings-panel .custom-bg-input:focus {
  border-color: #49B1F5;
}
[data-theme="dark"] #settings-panel .btn-reset {
  background: rgba(73, 177, 245, 0.08);
  border-color: rgba(73, 177, 245, 0.2);
}
[data-theme="dark"] #settings-overlay {
  background: rgba(0, 0, 0, 0.6);
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
  #settings-panel {
    width: 100vw;
    max-width: 100vw;
    right: -100vw;
  }
}