/* =========================================================
   VideoFetcher - 样式表
   风格：简洁工具型 dashboard，蓝灰配色，功能优先
   组织：变量 → 基础 → 布局 → 按钮 → 输入 → 卡片 → 列表
        → 进度条 → 徽章 → Toast → 响应式
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  /* 主色：清爽蓝 */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-soft: #eff6ff;

  /* 中性色 */
  --color-bg: #f1f5f9;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;

  /* 语义色 */
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;

  /* 尺寸 */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.12);
  --container-max: 960px;

  --transition: 0.2s ease;
}

/* ---------- 基础重置 ---------- */
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  color: var(--color-text);
}

/* ---------- 布局容器 ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px 24px;
  margin-top: 20px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.section-title {
  font-size: 16px;
  font-weight: 600;
}

.app-header {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}

.app-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.app-subtitle {
  margin: 6px 0 16px;
  color: var(--color-text-secondary);
  font-size: 13px;
}

.app-footer {
  margin-top: 28px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 12px;
}

/* ---------- 顶部解析栏 ---------- */
.parse-bar {
  display: flex;
  gap: 10px;
}

.parse-bar .input {
  flex: 1;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition),
    color var(--transition), opacity var(--transition);
  white-space: nowrap;
  user-select: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover:not(:disabled) {
  background: #f8fafc;
  border-color: var(--color-text-muted);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: #f1f5f9;
  color: var(--color-text);
}

.btn-danger {
  background: #fef2f2;
  color: var(--color-error);
  border-color: #fecaca;
}
.btn-danger:hover:not(:disabled) {
  background: var(--color-error);
  color: #fff;
  border-color: var(--color-error);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

/* ---------- 输入控件 ---------- */
.input {
  width: 100%;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.input-textarea {
  resize: vertical;
  min-height: 110px;
  line-height: 1.5;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  color: var(--color-text-secondary);
}

/* ---------- 批量区布局 ---------- */
.batch-status {
  margin-top: 16px;
}

/* ---------- 视频信息卡片 ---------- */
.video-card {
  display: flex;
  gap: 16px;
  padding: 14px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.video-thumb {
  width: 200px;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--color-border);
  flex-shrink: 0;
}

.video-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.video-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  /* 标题超长省略 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.video-meta span {
  display: inline-flex;
  align-items: center;
}

/* ---------- 清晰度 / 字幕列表 ---------- */
.subsection {
  margin-top: 18px;
}

.subsection-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

/* 可折叠的子区标题（批量下载区清晰度档位选择） */
.subsection-title-collapsible {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  padding: 6px 8px;
  margin: 0 0 10px 0;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.subsection-title-collapsible:hover {
  background: var(--color-surface);
}
.subsection-title-collapsible:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.collapse-arrow {
  display: inline-block;
  font-size: 11px;
  color: var(--color-text-secondary);
  transition: transform var(--transition);
  width: 12px;
}
.subsection-hint {
  margin-left: auto;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-surface);
  padding: 2px 8px;
  border-radius: 10px;
}

/* 单视频清晰度列表折叠开关（小箭头按钮） */
.format-collapse-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
  background: transparent;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition);
}
.format-collapse-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.format-collapse-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.format-collapse-toggle .collapse-arrow {
  font-size: 10px;
}
.format-collapse-toggle .collapse-label {
  font-weight: 500;
}

.format-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* hidden 属性优先级修复:.format-list 的 display:flex 会覆盖 HTML hidden 属性的默认 display:none,
   导致批量区清晰度档位列表默认展开且无法折叠。用 [hidden] 显式提升优先级。 */
.format-list[hidden] {
  display: none !important;
}

/* 折叠状态的单视频清晰度项:默认隐藏;
   父级 .format-list 加 .expanded 类时显示全部。
   用双类选择器 .format-item.format-item-collapsed 提高优先级到 0,0,2,0,
   避免被后面 .format-item { display:flex } 覆盖。 */
.format-item.format-item-collapsed {
  display: none;
}
.format-list.expanded .format-item.format-item-collapsed {
  display: flex;
}

.format-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.format-item:hover {
  border-color: var(--color-border-strong);
  background: #f8fafc;
}

.format-item input {
  margin: 0;
  accent-color: var(--color-primary);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.format-main {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.format-resolution {
  font-weight: 600;
  color: var(--color-text);
}

.format-detail {
  color: var(--color-text-secondary);
  font-size: 13px;
}

.format-codecs {
  color: var(--color-text-muted);
  font-size: 12px;
}

.download-bar {
  margin-top: 18px;
  display: flex;
  gap: 10px;
  align-items: center;
}

/* ---------- 通用列表（历史 / 文件） ---------- */
.list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}

.history-toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 14px;
  margin-bottom: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.bili-settings-hint {
  margin: 0 0 12px;
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.history-checkbox {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.list-item:hover {
  border-color: var(--color-border-strong);
}

.list-item-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.list-item-title {
  font-weight: 500;
  color: var(--color-text);
  /* 单行省略 */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.empty-state {
  padding: 24px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 13px;
  background: #f8fafc;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
}

/* ---------- 进度条 ---------- */
.progress-card {
  margin-top: 16px;
  padding: 14px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.progress-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 13px;
}

.progress-status {
  font-weight: 600;
  color: var(--color-text);
}

.progress-percent {
  color: var(--color-primary);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 999px;
  /* 宽度过渡：实现平滑动画 */
  transition: width 0.3s ease;
  width: 0%;
}

.progress-fill.is-completed {
  background: var(--color-success);
}

.progress-fill.is-error {
  background: var(--color-error);
}

.progress-info {
  display: flex;
  gap: 16px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

/* ---------- 批次状态 ---------- */
.batch-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 12px 14px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.batch-summary strong {
  color: var(--color-text);
  font-weight: 600;
}

.task-queue {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.task-queue-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.task-queue-url {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-secondary);
}

/* ---------- 徽章标签 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 500;
  border-radius: 999px;
  background: var(--color-border);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.badge-platform {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.badge-hd {
  background: #ecfdf5;
  color: var(--color-success);
}

.badge-auto {
  background: #f3f4f6;
  color: var(--color-text-muted);
}

.badge-completed {
  background: #ecfdf5;
  color: var(--color-success);
}

.badge-failed {
  background: #fef2f2;
  color: var(--color-error);
}

.badge-pending,
.badge-downloading,
.badge-merging {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

/* ---------- Toast 提示 ---------- */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  min-width: 240px;
  max-width: 360px;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-text-muted);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  color: var(--color-text);
  /* 入场动画起点 */
  opacity: 0;
  transform: translateX(20px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: auto;
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast-info {
  border-left-color: var(--color-primary);
}
.toast-success {
  border-left-color: var(--color-success);
}
.toast-error {
  border-left-color: var(--color-error);
}

/* ---------- 响应式：移动端单列 ---------- */
@media (max-width: 640px) {
  .container {
    padding: 16px 12px 32px;
  }

  .section,
  .app-header {
    padding: 16px;
  }

  .parse-bar {
    flex-direction: column;
  }

  .video-card {
    flex-direction: column;
  }

  .video-thumb {
    width: 100%;
    height: 180px;
  }

  .toast-container {
    left: 12px;
    right: 12px;
    top: 12px;
  }

  .toast {
    max-width: none;
  }
}