:root {
  --bg: #0f1419;
  --panel: #171d24;
  --border: #262f3a;
  --fg: #e6edf3;
  --muted: #8b98a5;
  --accent: #3b82f6;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.5 -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  min-width: 280px;
  padding: 12px 16px;
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toast-in 0.3s ease-out, toast-out 0.3s ease-in 2.7s forwards;
  pointer-events: auto;
}
.toast-success { background: #166534; border: 1px solid #22c55e; }
.toast-error { background: #991b1b; border: 1px solid #ef4444; }
.toast-warning { background: #78350f; border: 1px solid #f59e0b; }
.toast-loading { background: #1e40af; border: 1px solid #3b82f6; }
.toast .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
.toast-error .spinner { border-color: rgba(239,68,68,0.3); border-top-color: #fff; }
.toast-success .spinner { border-color: rgba(34,197,94,0.3); border-top-color: #fff; }
.toast-warning .spinner { border-color: rgba(245,158,11,0.3); border-top-color: #fff; }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(100%); }
}
@keyframes spin { to { transform: rotate(360deg); } }

.wrap { max-width: 560px; margin: 0 auto; padding: 24px 16px 48px; }
.head h1 { margin: 0 0 4px; font-size: 22px; }
.sub { margin: 0 0 16px; color: var(--muted); font-size: 13px; }

/* 说明文字 */
.help-text {
  padding: 12px;
  background: rgba(59,130,246,0.1);
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 12px;
  color: var(--accent);
}
.help-text p {
  margin: 6px 0;
  line-height: 1.6;
  /* updateUIText 用 \n 拼行，textContent + pre-line 折行，不拼 HTML */
  white-space: pre-line;
}

.tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.tab {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: transparent; color: var(--muted); cursor: pointer;
  font-size: 13px; text-decoration: none;
}
.tab.active { color: var(--fg); border-color: var(--accent); background: rgba(59,130,246,.12); }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.hidden { display: none !important; }
.field { margin-bottom: 14px; }
.field > label { display: block; margin-bottom: 4px; font-size: 13px; color: var(--muted); }
input[type=text], input[type=file], textarea, select {
  width: 100%; padding: 8px 10px; background: #0d1117; color: var(--fg);
  border: 1px solid var(--border); border-radius: 6px; font: inherit;
}
textarea { resize: vertical; min-height: 80px; }
textarea:focus { outline: none; border-color: var(--accent); }
.textarea-wrapper { position: relative; }

/* 字数统计（放左下角，避开右下角的粘贴按钮） */
.text-counter {
  position: absolute;
  left: 10px;
  bottom: 6px;
  font-size: 11px;
  color: var(--muted);
  pointer-events: none;
}
.text-counter.warning { color: var(--warning); }

.check { display: flex; align-items: center; gap: 6px; color: var(--fg); font-size: 13px; }
.check input { width: auto; }
.hint { margin: 4px 0 0; font-size: 12px; color: var(--muted); }

/* 类型按钮组 */
.type-buttons {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.type-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 8px;
  border: 2px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  flex: 1;
  transition: all 0.2s;
}
.type-btn:hover { background: rgba(59,130,246,0.05); }
.type-btn.active {
  border-color: var(--accent);
  background: rgba(59,130,246,0.15);
  color: var(--accent);
}
.type-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.type-btn span {
  font-size: 14px;
  font-weight: 500;
}
.burn-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-radius: 8px;
  border: none;
  background: rgba(245, 158, 11, 0.1);
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}
.burn-btn:hover {
  background: rgba(245, 158, 11, 0.15);
  color: var(--fg);
}
.burn-btn input { width: auto; }
.burn-btn.active {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

button.primary, button.ghost, button.danger, button.paste-btn {
  padding: 8px 14px; border-radius: 6px; border: 1px solid transparent;
  font: inherit; cursor: pointer; font-size: 13px;
}
button.primary { background: var(--accent); color: #fff; width: 100%; }
button.primary:disabled { opacity: .6; cursor: not-allowed; }
button.ghost { background: transparent; border-color: var(--border); color: var(--fg); }
button.ghost:hover { background: rgba(255,255,255,.05); }
button.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
button.danger:hover { background: rgba(239,68,68,.1); }
button.paste-btn {
  position: absolute; right: 10px; bottom: 8px;
  padding: 4px 10px; font-size: 12px; background: var(--border);
  color: var(--fg); border: 1px solid var(--border); border-radius: 4px;
}
button.paste-btn:hover { background: var(--accent); border-color: var(--accent); }
.row { display: flex; gap: 10px; margin: 10px 0; }
.row-2 { display: flex; gap: 12px; margin-bottom: 16px; }
.row-2 .field { flex: 1; margin-bottom: 0; }
.error { color: var(--danger); min-height: 20px; margin: 8px 0 0; font-size: 13px; }
.result { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.result-label { margin: 0; color: var(--muted); font-size: 12px; }
.code {
  margin: 4px 0 6px; font-size: 32px; letter-spacing: 6px; font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.8; } }
.file-item { margin: 8px 0; }
pre.text-out {
  white-space: pre-wrap; word-break: break-word; background: #0d1117;
  border: 1px solid var(--border); border-radius: 6px; padding: 10px; margin: 8px 0;
  max-height: 240px; overflow: auto; font-size: 13px;
}
.dl { display: inline-block; padding: 8px 14px; border-radius: 6px; background: var(--accent); color: #fff; text-decoration: none; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat { background: #0d1117; border: 1px solid var(--border); border-radius: 6px; padding: 10px; }
.stat b { display: block; font-size: 18px; }
.stat span { color: var(--muted); font-size: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th, td { text-align: left; padding: 6px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

.drag-drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 40px 20px;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
}
.drag-drop-zone:hover, .drag-drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(59,130,246,0.05);
}
.drag-drop-zone .drag-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.drag-drop-zone svg {
  margin-bottom: 10px;
}
.file-info {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px;
  background: #0d1117;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.file-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-size {
  color: var(--muted);
  font-size: 12px;
}
.file-pending {
  flex-basis: 100%;
  color: var(--success);
  font-size: 12px;
  font-weight: 600;
}

#claim-preview {
  margin-top: 16px;
  padding: 16px;
  background: rgba(34, 197, 94, 0.05);
  border: 1px solid var(--success);
  border-radius: 8px;
}

.preview-item {
  margin: 8px 0;
  font-size: 14px;
}

.preview-item .preview-label {
  color: var(--muted);
  margin-right: 8px;
}

.preview-item .preview-value {
  color: var(--fg);
  font-weight: 500;
}

#preview-actions {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

#preview-actions button {
  flex: 1;
}

.download-done {
  padding: 16px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid var(--success);
  border-radius: 8px;
  color: var(--success);
  font-size: 14px;
  text-align: center;
}

.download-done strong {
  color: var(--fg);
  font-weight: 600;
}

.download-progress {
  margin-top: 16px;
  padding: 16px;
  background: var(--border);
  border-radius: 8px;
}

.download-filename {
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg);
}

.download-progress .progress-bar {
  height: 12px;
  background: var(--bg);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 8px;
}

.download-progress .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 6px;
  transition: width 0.3s ease;
}

.download-progress .progress-text {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.upload-progress {
  margin-top: 10px;
}
.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.15s ease;
}
.progress-text {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}
/* ---- 手机端：精简布局，压掉一切不必要的纵向空间，尽量不滚屏 ----
 * 取舍：
 * - 隐藏帮助文字与语言按钮之外的头部装饰，标题压成一行；
 * - 类型按钮保持横排（竖排最浪费纵向空间）；
 * - 输入框字号 16px：小于 16px 会让 iOS Safari 聚焦时自动放大页面；
 * - 表格在窄屏内横向滚动（管理后台），不做响应式重排。
 */
@media (max-width: 520px) {
  .wrap { padding: 10px 10px 20px; }
  .head h1 { font-size: 18px; margin: 0 0 2px; }
  .sub { margin: 0 0 8px; font-size: 12px; padding-right: 64px; }
  .help-text { display: none; }

  .tabs { gap: 4px; margin-bottom: 10px; }
  .tab { padding: 5px 9px; font-size: 12px; }

  .panel { padding: 12px; border-radius: 8px; }
  .field { margin-bottom: 10px; }
  .field > label { margin-bottom: 2px; font-size: 12px; }
  .row-2 { gap: 8px; margin-bottom: 10px; }

  /* 16px 是 iOS 不触发聚焦缩放的下限 */
  input[type=text], input[type=file], textarea, select { padding: 8px; font-size: 16px; }
  textarea { min-height: 60px; }

  .type-buttons { gap: 6px; margin-bottom: 10px; }
  .type-btn { padding: 10px 6px; gap: 5px; border-width: 1px; }
  .type-btn svg { width: 16px; height: 16px; }
  .type-btn span { font-size: 12px; }
  .burn-btn { padding: 10px 8px; border-width: 1px; }
  .burn-btn span { font-size: 12px; }

  .drag-drop-zone { padding: 16px 10px; }
  .drag-drop-zone .drag-content { gap: 6px; }
  .drag-drop-zone svg { width: 30px; height: 30px; }
  .drag-drop-zone p { margin: 0; font-size: 12px; color: var(--muted); }
  
  /* 移动端隐藏拖放图标，更简洁 */
  .drag-drop-zone svg.upload-icon { display: none; }
  .drag-drop-zone p { margin-bottom: 8px; }

  button.primary, button.ghost, button.danger, button.paste-btn {
    padding: 9px 12px; font-size: 13px;
  }
  button.primary { padding: 11px 12px; }
  .row { gap: 6px; margin: 8px 0; }
  .row button { flex: 1; padding-inline: 6px; }

  .result { margin-top: 10px; padding-top: 10px; }
  .code { font-size: 26px; letter-spacing: 3px; margin: 2px 0 4px; }
  .hint { font-size: 11px; }
  .error { margin: 6px 0 0; min-height: 18px; font-size: 12px; }

  #toast-container { top: auto; bottom: 12px; right: 10px; left: 10px; }
  .toast { min-width: auto; padding: 10px 12px; font-size: 13px; }

  /* 管理后台的表格：窄屏横向滚动，不重排 */
  table { display: block; overflow-x: auto; }
  .grid { grid-template-columns: 1fr 1fr; gap: 6px; }
  .stat { padding: 8px; }
  .stat b { font-size: 15px; }
  .stat span { font-size: 11px; }
}

/* ============== 标签按钮图标 ============== */
.tab {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tab svg {
  flex-shrink: 0;
  opacity: 0.8;
}

.tab:hover svg {
  opacity: 1;
}

/* ============== 历史记录 ============== */
#panel-history {
  display: flex;
  flex-direction: column;
  max-width: 800px;
  margin: 0 auto;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0 16px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.history-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.history-actions {
  display: flex;
  gap: 8px;
}

.btn-text {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
}

.btn-text:hover {
  color: var(--fg);
  background: var(--border);
}

.btn-icon {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  line-height: 1;
}

.btn-icon:hover {
  color: var(--fg);
  background: var(--border);
}

.history-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0;
  gap: 4px;
  margin-bottom: 16px;
}

.history-tab {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 14px;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.2s;
}

.history-tab:hover {
  color: var(--fg);
}

.history-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.history-list {
  flex: 1;
  overflow-y: auto;
  padding: 0;
  min-height: 400px;
}

.history-empty {
  text-align: center;
  color: var(--muted);
  padding: 40px 20px;
  font-size: 14px;
}

.history-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 12px;
  transition: border-color 0.2s;
}

.history-item:hover {
  border-color: var(--accent);
}

.history-item-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.history-kind {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.history-status {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

.history-status.burn {
  background: rgba(245, 158, 11, 0.2);
  color: var(--warning);
}

.history-status.normal {
  background: rgba(59, 130, 246, 0.2);
  color: var(--accent);
}

.history-time {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

.history-item-body {
  margin-bottom: 8px;
}

.history-content {
  font-size: 13px;
  color: var(--fg);
  margin-bottom: 6px;
  word-break: break-all;
  line-height: 1.5;
  max-height: 60px;
  overflow: hidden;
}

.history-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
}

.history-code {
  font-family: 'Courier New', monospace;
  font-weight: 600;
  color: var(--accent);
}

.history-passphrase {
  opacity: 0.8;
}

.history-remaining {
  color: var(--warning);
  font-weight: 500;
}

.history-item-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.history-item-footer button {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--fg);
  cursor: pointer;
  transition: all 0.2s;
}

.history-item-footer button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.history-item-resend,
.history-item-receive {
  background: var(--accent) !important;
  color: #fff !important;
  border-color: var(--accent) !important;
}

.history-item-resend:hover,
.history-item-receive:hover {
  opacity: 0.9;
}

.history-item-delete {
  color: var(--danger) !important;
  border-color: var(--danger) !important;
}

.history-item-delete:hover {
  background: rgba(239, 68, 68, 0.1) !important;
}

.history-footer {
  padding: 12px 0;
  border-top: 1px solid var(--border);
  margin-top: 16px;
}

.privacy-hint {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

/* 移动端适配 */
@media (max-width: 640px) {
  .history-panel {
    width: 95%;
    max-height: 90vh;
  }
  
  .history-header {
    padding: 12px 16px;
  }
  
  .history-list {
    padding: 12px 16px;
  }
  
  .history-item {
    padding: 10px;
  }
  
  .history-item-footer {
    flex-direction: column;
  }
  
  .history-item-footer button {
    width: 100%;
  }
}