/* ============================================================
 *  Settings · Terminal 风格
 *  桌面：左右两栏固定尺寸
 *  手机：全屏铺满 + 顶部标签三列 Grid
 * ============================================================ */

/* ===== 遮罩 ===== */
.settings-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(1, 4, 9, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  padding: 1rem;
  padding-top: max(1rem, env(safe-area-inset-top));
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
body.light .settings-overlay { background-color: rgba(60, 55, 40, 0.45); }
.settings-overlay.open { opacity: 1; pointer-events: auto; }

/* ===== 面板 ===== */
.settings-panel {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 820px;
  height: 640px;
  max-height: 90vh;
  max-height: 90dvh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transform: translateY(6px) scale(0.98);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  overscroll-behavior: contain;
  outline: 1px solid rgba(126, 231, 135, 0.08);
  outline-offset: -1px;
}
body.light .settings-panel {
  outline: 1px solid rgba(42, 161, 152, 0.08);
}
.settings-overlay.open .settings-panel {
  transform: translateY(0) scale(1);
}

/* ===== 头部 ===== */
.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.1rem;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  background-color: var(--bg-subtle);
  position: relative;
}
.settings-header::before {
  content: '';
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.settings-header h2 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-bright);
  text-transform: uppercase;
  padding-left: 1.25rem;
}
.settings-header h2::before {
  content: '> ';
  color: var(--accent);
  font-weight: 700;
}
.settings-header h2::after {
  content: '_';
  color: var(--accent);
  animation: blink 1.1s step-end infinite;
  margin-left: 2px;
  font-weight: 400;
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.settings-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: transparent;
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s;
  flex-shrink: 0;
  font-family: inherit;
  border: 1px solid transparent;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.settings-close:hover {
  background-color: var(--red-soft);
  border-color: var(--red);
  color: var(--red);
}
.settings-close:active { transform: scale(0.92); }

/* ===== 两栏主体 ===== */
.settings-body {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ---- 左侧导航（桌面）---- */
.settings-nav {
  width: 170px;
  flex-shrink: 0;
  padding: 0.7rem 0.5rem;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  overflow-y: auto;
  background-color: var(--bg-subtle);
  scrollbar-width: thin;
}

.settings-nav-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: left;
  transition: all 0.1s;
  white-space: nowrap;
  position: relative;
  border: 1px solid transparent;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  width: 100%;
}
.settings-nav-item::before {
  content: '';
  position: absolute;
  left: 0.35rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 0;
  background-color: var(--accent);
  border-radius: 1px;
  transition: height 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 6px var(--accent-glow);
}
.settings-nav-item:hover {
  background-color: var(--bg-hover);
  color: var(--text);
}
.settings-nav-item.active {
  background-color: var(--bg-hover);
  color: var(--accent);
  font-weight: 600;
  border-color: rgba(126, 231, 135, 0.15);
}
.settings-nav-item.active::before { height: 60%; }
.nav-icon {
  font-size: 0.85rem;
  line-height: 1;
  opacity: 0.85;
  flex-shrink: 0;
  width: 1.1em;
  text-align: center;
}
.nav-label { flex: 1; }

/* ---- 右侧内容 ---- */
.settings-content {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  padding: 1.1rem 1.4rem 1.5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.settings-section { display: none; }
.settings-section.active {
  display: block;
  animation: fadeIn 0.18s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 分组 ===== */
.settings-group { margin-bottom: 1.5rem; }
.settings-group:last-child { margin-bottom: 0; }
.settings-group-title {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.settings-group-title::before {
  content: '───';
  color: var(--border-strong);
  font-family: var(--font-mono);
  letter-spacing: -2px;
}
.settings-group-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border);
}

/* ===== 设置行 ===== */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0;
  gap: 0.9rem;
}
.setting-row + .setting-row {
  border-top: 1px solid var(--border);
}
.setting-label {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--text);
  flex: 1;
  font-weight: 500;
}
.setting-desc {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
  font-weight: 400;
}

/* ===== 按钮组 ===== */
.btn-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--bg);
}
.group-btn {
  flex: 1;
  padding: 0.5rem 0.4rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 500;
  border: none;
  border-right: 1px solid var(--border);
  background-color: transparent;
  color: var(--text-secondary);
  transition: all 0.1s;
  text-align: center;
  min-height: 34px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.group-btn:last-child { border-right: none; }
.group-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text);
}
.group-btn.active {
  background-color: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--accent);
}

/* ===== 颜色选择 ===== */
.color-options {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  touch-action: manipulation;
}
.color-dot {
  width: 36px;
  height: 36px;
  min-width: 36px;
  min-height: 36px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: all 0.12s;
  padding: 0;
  position: relative;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}
.color-dot::after {
  content: '';
  position: absolute;
  inset: 2px;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
  pointer-events: none;
}
.color-dot:hover { transform: scale(1.1); }
.color-dot.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft), 0 0 10px var(--accent-soft);
}

/* ===== 开关 ===== */
.toggle-switch {
  position: relative;
  width: 42px;
  height: 24px;
  border-radius: 12px;
  background-color: var(--bg);
  border: 1px solid var(--border-strong);
  transition: all 0.2s;
  flex-shrink: 0;
  padding: 0;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--text-muted);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.toggle-switch.on {
  background-color: var(--accent-soft);
  border-color: var(--accent);
}
.toggle-switch.on::after {
  transform: translateX(18px);
  background-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ===== 输入行 ===== */
.input-row { display: flex; gap: 0.4rem; }
.input-row input {
  flex: 1;
  padding: 0.55rem 0.8rem;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--text-bright);
  min-width: 0;
  min-height: 38px;
  transition: all 0.12s;
}
.input-row input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.input-row input::placeholder { color: var(--text-muted); }

.wallpaper-extra {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.wallpaper-extra .secondary-btn { flex: 1; }

/* ===== 列表 ===== */
.engine-setting-list,
.rss-setting-list,
.bookmark-setting-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 2px;
}
.engine-setting-item,
.rss-setting-item,
.bookmark-setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius);
  background-color: var(--bg);
  border: 1px solid var(--border);
  gap: 0.5rem;
  transition: border-color 0.12s;
}
.engine-setting-item:hover,
.rss-setting-item:hover,
.bookmark-setting-item:hover {
  border-color: var(--border-strong);
}

.bookmark-setting-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  font-size: 1rem;
  flex-shrink: 0;
  line-height: 1;
}

.engine-setting-name {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-bright);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.engine-setting-name::before {
  content: '>';
  color: var(--accent);
  font-weight: 700;
  font-family: var(--font-mono);
}
.engine-setting-url {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
  word-break: break-all;
  line-height: 1.4;
  padding-left: 1.1em;
}
.engine-setting-actions {
  display: flex;
  gap: 0.3rem;
  flex-shrink: 0;
}
.engine-action-btn {
  padding: 0.35rem 0.65rem;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  transition: all 0.12s;
  white-space: nowrap;
  min-height: 30px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.engine-action-btn:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-strong);
  color: var(--text-bright);
}
.engine-action-btn.primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #0d1117;
  font-weight: 600;
}
body.light .engine-action-btn.primary { color: #fffbf0; }
.engine-action-btn.primary:hover {
  background-color: var(--accent-dim);
  border-color: var(--accent-dim);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ===== 添加表单 ===== */
.add-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding: 0.75rem;
  border-radius: var(--radius);
  background-color: var(--bg);
  border: 1px dashed var(--border-strong);
}
.add-form input {
  padding: 0.6rem 0.8rem;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--bg-elevated);
  color: var(--text-bright);
  width: 100%;
  min-height: 38px;
  transition: all 0.12s;
}
.add-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.add-form input::placeholder { color: var(--text-muted); }
.add-form .form-actions {
  display: flex;
  gap: 0.35rem;
  justify-content: flex-end;
}

/* ===== 底部 ===== */
.settings-footer {
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 0.55rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  background-color: var(--bg-subtle);
}
.settings-footer::before {
  content: '// ';
  opacity: 0.6;
  font-family: var(--font-mono);
}

/* ============================================================
 *  手机端 · 全屏 + 顶部标签三列 Grid
 * ============================================================ */
@media (max-width: 640px) {
  /* 遮罩去掉 padding，面板铺满 */
  .settings-overlay {
    padding: 0;
    align-items: stretch;
  }

  /* 面板全屏 */
  .settings-panel {
    max-width: 100%;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    max-height: 100vh;
    max-height: 100dvh;
    border-radius: 0;
    border: none;
    outline: none;
    transform: translateY(100%);
  }
  .settings-overlay.open .settings-panel {
    transform: translateY(0);
  }

  /* 头部 */
  .settings-header {
    padding: 0.7rem 0.9rem;
    padding-top: max(0.7rem, env(safe-area-inset-top));
    flex-shrink: 0;
  }
  .settings-header h2 {
    font-size: 0.9rem;
    padding-left: 1rem;
  }
  .settings-header::before {
    left: 0.65rem;
    width: 5px;
    height: 5px;
  }
  .settings-close {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  /* 主体改纵向 */
  .settings-body {
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
  }

  /* ==========================================
   * 顶部标签：三列 Grid
   * ========================================== */
  .settings-nav {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.35rem;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 0.6rem;
    overflow: visible;
    flex-shrink: 0;
    background-color: var(--bg-subtle);
  }

  .settings-nav-item {
    width: 100%;
    padding: 0.45rem 0.3rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background-color: var(--bg-elevated);
    font-size: 0.72rem;
    min-height: 40px;
    white-space: nowrap;
    gap: 0.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }
  .settings-nav-item::before { display: none; }
  .settings-nav-item .nav-icon {
    font-size: 0.85rem;
    width: auto;
    flex-shrink: 0;
  }
  .settings-nav-item .nav-label {
    display: inline;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
  }
  .settings-nav-item.active {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #0d1117;
    font-weight: 600;
    box-shadow: 0 0 12px var(--accent-glow);
  }
  body.light .settings-nav-item.active { color: #fffbf0; }

  /* 内容区 */
  .settings-content {
    padding: 1rem 1rem 1.5rem;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
  }

  .settings-group { margin-bottom: 1.2rem; }
  .settings-group-title {
    font-size: 0.65rem;
    margin-bottom: 0.6rem;
  }

  .setting-row {
    padding: 0.7rem 0;
    gap: 0.75rem;
    align-items: flex-start;
  }
  .setting-row > div:first-child {
    flex: 1;
    min-width: 0;
  }
  .setting-label { font-size: 0.85rem; }
  .setting-desc {
    font-size: 0.72rem;
    margin-top: 0.2rem;
  }

  /* 按钮组纵向 */
  .btn-group {
    flex-direction: column;
    width: 100%;
  }
  .group-btn {
    border-right: none;
    border-bottom: 1px solid var(--border);
    min-height: 44px;
    font-size: 0.82rem;
  }
  .group-btn:last-child { border-bottom: none; }

  /* 色板 */
  .color-options { gap: 0.75rem; }
  .color-dot {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }

  /* 开关 */
  .toggle-switch {
    width: 48px;
    height: 28px;
    min-width: 48px;
    min-height: 28px;
    border-radius: 14px;
  }
  .toggle-switch::after {
    width: 22px;
    height: 22px;
    top: 2px;
    left: 2px;
  }
  .toggle-switch.on::after {
    transform: translateX(20px);
  }

  /* 列表项 */
  .engine-setting-item,
  .rss-setting-item,
  .bookmark-setting-item {
    flex-wrap: wrap;
    padding: 0.75rem 0.85rem;
    gap: 0.6rem;
  }
  .engine-setting-item > div:first-child,
  .rss-setting-item > div:first-child,
  .bookmark-setting-item > div:first-child {
    flex: 1;
    min-width: 0;
    width: 100%;
  }
  .engine-setting-actions {
    width: 100%;
    justify-content: flex-end;
    padding-top: 0.4rem;
    border-top: 1px dashed var(--border);
    margin-top: 0.2rem;
  }
  .engine-action-btn {
    padding: 0.45rem 0.9rem;
    font-size: 0.75rem;
    min-height: 36px;
    flex: 1;
    justify-content: center;
  }

  /* 输入行 */
  .input-row {
    flex-direction: column;
    gap: 0.5rem;
  }
  .input-row input {
    min-height: 44px;
    font-size: 0.88rem;
    width: 100%;
  }
  .input-row .secondary-btn {
    min-height: 44px;
    width: 100%;
  }

  .wallpaper-extra {
    flex-direction: column;
    gap: 0.5rem;
  }
  .wallpaper-extra .secondary-btn {
    min-height: 44px;
  }

  /* 主题市场 */
  .theme-market {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
  }
  .theme-card { padding: 0.75rem; }
  .theme-card-preview { height: 28px; }
  .theme-card-name { font-size: 0.78rem; }
  .theme-card-desc { font-size: 0.65rem; }

  /* 底部 */
  .settings-footer {
    padding: 0.7rem;
    padding-bottom: max(0.7rem, env(safe-area-inset-bottom));
    font-size: 0.68rem;
    flex-shrink: 0;
  }
}

/* ============================================================
 *  超小屏（< 380px）
 * ============================================================ */
@media (max-width: 380px) {
  .settings-nav {
    padding: 0.5rem;
    gap: 0.3rem;
  }
  .settings-nav-item {
    padding: 0.4rem 0.2rem;
    font-size: 0.68rem;
    min-height: 38px;
  }
  .settings-nav-item .nav-icon {
    font-size: 0.8rem;
  }
  .theme-market {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
 *  触摸设备全局优化
 * ============================================================ */
@media (pointer: coarse) {
  .group-btn,
  .settings-nav-item,
  .engine-action-btn,
  .toggle-switch,
  .settings-close,
  .color-dot,
  .theme-card {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
}