/* 老年友好 UI：大字体、大按钮、高对比度 */
:root {
  --font-size: 20px;
  --font-size-lg: 24px;
  --font-size-sm: 18px;
  --btn-min-height: 52px;
  --primary: #1a5fb4;
  --primary-hover: #3584e4;
  --danger: #c01c28;
  --danger-hover: #e01b24;
  --bg: #fdf6e3;
  --card-bg: #fff;
  --text: #2e3436;
  --border: #babdb6;
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: var(--font-size);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 20px;
  min-height: 100vh;
}

.container {
  max-width: 720px;
  margin: 0 auto;
}

h1 {
  font-size: 28px;
  margin: 0 0 8px;
}

.subtitle {
  font-size: var(--font-size-sm);
  color: #5c6166;
  margin: 0 0 24px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.tab {
  font-size: var(--font-size-sm);
  padding: 12px 20px;
  min-height: var(--btn-min-height);
  border: 2px solid var(--border);
  background: var(--card-bg);
  border-radius: 8px;
  cursor: pointer;
}

.tab:hover {
  border-color: var(--primary);
}

.tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.step {
  display: none;
}

.step.active {
  display: block;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

.card h2 {
  font-size: var(--font-size-lg);
  margin: 0 0 16px;
}

.card h3 {
  font-size: var(--font-size);
  margin: 20px 0 12px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}

.field input,
.field select,
textarea {
  font-size: var(--font-size);
  padding: 12px 16px;
  min-height: 48px;
  width: 100%;
  border: 2px solid var(--border);
  border-radius: 8px;
}

textarea {
  min-height: 160px;
  resize: vertical;
}

.btn {
  font-size: var(--font-size);
  padding: 14px 24px;
  min-height: var(--btn-min-height);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-right: 12px;
  margin-bottom: 8px;
}

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

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

.btn.danger {
  background: var(--danger);
  color: white;
}

.btn.secondary {
  background: var(--card-bg);
  color: var(--text);
  border: 2px solid var(--border);
}

.btn.secondary:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

.btn.danger:hover:not(:disabled) {
  background: var(--danger-hover);
}

.btn.big {
  font-size: 22px;
  padding: 18px 32px;
  min-height: 60px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.hint {
  font-size: var(--font-size-sm);
  color: #5c6166;
  margin: 0 0 16px;
}

.record-actions {
  margin: 20px 0;
}

.upload-section {
  margin: 20px 0;
  padding: 16px 0;
  border-top: 1px dashed var(--border);
}

.upload-section .divider {
  display: block;
  margin-bottom: 12px;
  color: #5c6166;
  font-size: var(--font-size-sm);
}

.upload-label {
  cursor: pointer;
  display: inline-block;
}

.upload-hint {
  display: block;
  margin-top: 8px;
  font-size: var(--font-size-sm);
  color: #5c6166;
}

.stage-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.stage-tab {
  padding: 10px 16px;
  font-size: var(--font-size-sm);
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  cursor: pointer;
}

.stage-tab:hover {
  border-color: var(--primary);
}

.stage-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.guidance-prompt {
  margin: 16px 0;
  padding: 16px;
  background: #fef9e7;
  border-radius: 8px;
  border-left: 4px solid #f1c40f;
}

.guidance-icon {
  font-size: 20px;
  margin-right: 8px;
}

.btn-icon {
  margin-top: 8px;
  padding: 6px 12px;
  font-size: var(--font-size-sm);
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card-bg);
  cursor: pointer;
}

.btn-icon:hover:not(:disabled) {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.export-hint {
  display: block;
  margin-top: 6px;
  font-size: var(--font-size-sm);
  color: #5c6166;
}

.guidance-prompt p {
  margin: 0;
  font-size: var(--font-size);
  line-height: 1.6;
  color: var(--text);
}

.guidance-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.guidance-section {
  margin-bottom: 16px;
}

.guidance-section h3,
.classification-hint h3 {
  font-size: var(--font-size);
  margin-bottom: 8px;
}

.classification-hint {
  margin-bottom: 16px;
  padding: 12px;
  background: #f0f4f8;
  border-radius: 8px;
}

.hint-grid {
  font-size: var(--font-size-sm);
  color: #5c6166;
}

.hint-grid div {
  margin: 4px 0;
}

.chunk-item-card {
  margin: 16px 0;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.chunk-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.chunk-header audio {
  flex: 1;
  max-width: 100%;
  height: 40px;
}

.text-only-badge {
  font-size: var(--font-size-sm);
  color: #5c6166;
}

.add-text-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.add-text-section textarea {
  width: 100%;
  padding: 8px;
  font-size: var(--font-size-sm);
  resize: vertical;
}

.chunk-text {
  width: 100%;
  margin: 8px 0;
  padding: 8px;
  font-size: var(--font-size-sm);
}

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

.segment-edit-card {
  margin: 16px 0;
  padding: 16px;
  background: #f8f9fa;
  border-radius: 8px;
  border-left: 4px solid var(--primary);
}

.segment-text-preview {
  font-size: var(--font-size-sm);
  color: #5c6166;
  margin: 8px 0;
}

.segment-fields {
  display: grid;
  gap: 12px;
  margin: 12px 0;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-sm);
  cursor: pointer;
}

.classified-seg {
  margin: 12px 0;
  padding: 12px;
  background: #f8f9fa;
  border-radius: 8px;
  border-left: 4px solid var(--primary);
}

.status {
  font-size: var(--font-size-sm);
  margin: 12px 0;
  color: #5c6166;
}

.confirm-box {
  margin: 12px 0;
  padding: 12px;
  background: #fef3e2;
  border-radius: 8px;
  color: #b45309;
}

.chunk-list {
  margin-top: 16px;
}

.chunk-item {
  padding: 8px 12px;
  background: #f5f5f5;
  border-radius: 6px;
  margin-bottom: 8px;
  font-size: var(--font-size-sm);
}

.bio-content {
  margin-top: 20px;
  padding: 20px;
  background: #f9f9f9;
  border-radius: 8px;
  white-space: pre-wrap;
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.footer {
  font-size: 14px;
  color: #888;
  text-align: center;
  margin-top: 40px;
}

pre {
  background: #f5f5f5;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: var(--font-size-sm);
}

.error {
  color: var(--danger);
  margin: 8px 0;
}

.category-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.category-item {
  padding: 8px 14px;
  font-size: var(--font-size-sm);
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  cursor: pointer;
}

.category-item:hover {
  border-color: var(--primary);
}

.category-item.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.chunk-review-list {
  margin: 16px 0;
}

.chunk-review-card {
  margin: 16px 0;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.chunk-review-card:hover {
  border-color: var(--primary);
}

.chunk-review-card .chunk-audio {
  margin: 8px 0;
}

.chunk-review-card .chunk-audio audio {
  width: 100%;
  max-width: 400px;
  height: 40px;
}

.chunk-review-card .chunk-text {
  margin: 8px 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.chunk-review-card .chunk-classification {
  font-size: var(--font-size-sm);
  color: var(--primary);
  margin-top: 8px;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal .modal-content {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  max-width: 480px;
  width: 90%;
}

.modal .modal-content h3 {
  margin: 0 0 16px;
}

.modal .modal-content .field {
  margin: 12px 0;
}

.modal .modal-content button {
  margin: 8px 8px 8px 0;
}