/* 样式变量定义 */
:root {
  --bg-primary: #0f1419;
  --bg-secondary: #16181c;
  --bg-tertiary: #202327;
  --border-color: #2f3336;
  --text-primary: #e7e9ea;
  --text-secondary: #71767b;
  --text-muted: #536471;
  --accent-color: #1d9bf0;
  --accent-hover: #1a8cd8;
  --success-color: #00ba7c;
  --warning-color: #ffd400;
  --danger-color: #f4212e;
  --danger-bg: rgba(244, 33, 46, 0.1);
  --success-bg: rgba(0, 186, 124, 0.1);
  --card-radius: 14px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f7f9f9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eff3f4;
  --border-color: #cfd9de;
  --text-primary: #0f1419;
  --text-secondary: #536471;
  --text-muted: #8b98a5;
  --accent-color: #1d9bf0;
  --accent-hover: #1a8cd8;
  --danger-bg: rgba(244, 33, 46, 0.08);
  --success-bg: rgba(0, 186, 124, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 18px 24px 32px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 头部样式 */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.brand h1 {
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-version {
  font-size: 11px;
  font-weight: 600;
  background-color: var(--accent-color);
  color: #fff;
  padding: 2px 7px;
  border-radius: 9999px;
}

.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 3px;
}

.header-actions {
  display: flex;
  gap: 10px;
}

/* 按钮基础 */
.btn {
  padding: 8px 16px;
  border-radius: 9999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-tertiary);
}

.btn-text {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 8px;
}

.btn-text:hover {
  color: var(--danger-color);
}

.btn-chip {
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 9999px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-chip:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* 工作台双栏布局 */
.workbench-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 24px;
  flex: 1;
}

/* 面板通用 */
.editor-pane, .preview-pane {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 8px;
}

.pane-header h2 {
  font-size: 16px;
  font-weight: 700;
}

.sample-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.label-hint {
  font-size: 12px;
  color: var(--text-secondary);
}

.hint-text {
  font-size: 12px;
  color: var(--text-secondary);
}

/* 文本编辑器 */
.textarea-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-bottom: 12px;
}

textarea#sourceInput {
  width: 100%;
  min-height: 240px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 14px;
  font-size: 15px;
  line-height: 1.6;
  resize: vertical;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

textarea#sourceInput:focus {
  border-color: var(--accent-color);
}

/* 统计条 */
.stats-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-tertiary);
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.stat-item {
  font-size: 13px;
  display: flex;
  gap: 6px;
  align-items: center;
}

.stat-label {
  color: var(--text-secondary);
}

.stat-val {
  font-weight: 700;
  color: var(--text-primary);
}

/* 控制行 */
.control-box {
  background: var(--bg-tertiary);
  padding: 14px;
  border-radius: 10px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.control-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.switch-label {
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}

.switch-label code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}

.btn-group-primary {
  display: flex;
  gap: 12px;
}

/* 检查清单 */
.checklist-card {
  background: var(--bg-tertiary);
  border-radius: 10px;
  padding: 14px;
  border: 1px solid var(--border-color);
}

.checklist-card h3 {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.checklist-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.check-item {
  font-size: 13px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 6px;
  transition: all 0.2s;
}

.check-item.pass {
  background: var(--success-bg);
  color: var(--success-color);
}

.check-item.fail {
  background: var(--danger-bg);
  color: var(--danger-color);
}

.check-item.pending {
  color: var(--text-secondary);
}

/* 串推时间线预览区 */
.thread-timeline {
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  max-height: 800px;
  padding-right: 4px;
}

.tweet-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  position: relative;
  transition: border-color 0.2s ease;
}

.tweet-card:hover {
  border-color: var(--text-muted);
}

.tweet-card.overlimit {
  border-color: var(--danger-color);
  background: var(--danger-bg);
}

.tweet-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.tweet-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1d9bf0, #7856ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #fff;
  font-size: 14px;
}

.author-meta {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.author-handle {
  font-size: 12px;
  color: var(--text-secondary);
}

.tweet-meta-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}

.weight-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 9999px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.weight-badge.safe {
  color: var(--success-color);
}

.weight-badge.danger {
  background: var(--danger-color);
  color: #fff;
}

.tweet-content {
  font-size: 15px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.tweet-content a {
  color: var(--accent-color);
  text-decoration: none;
}

.tweet-footer {
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
}

.btn-copy-tweet {
  padding: 5px 12px;
  font-size: 12px;
  border-radius: 9999px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-copy-tweet:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.btn-copy-tweet.copied {
  background: var(--success-color);
  color: #fff;
  border-color: var(--success-color);
}

/* 空白提示状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 44px;
  margin-bottom: 12px;
}

.empty-sub {
  font-size: 13px;
  margin-top: 6px;
  color: var(--text-muted);
}

/* 底部声明 */
.app-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* Toast 提示 */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 10px 20px;
  border-radius: 9999px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(0,0,0,0.3);
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  z-index: 9999;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* 移动端响应式 */
@media (max-width: 900px) {
  .workbench-layout {
    grid-template-columns: 1fr;
  }
  .app-container {
    padding: 12px 14px;
  }
}