/* ═══════════════════════════════════════════════════════════
   南怀瑾著作 RAG 检索系统 — 样式
   ═══════════════════════════════════════════════════════════ */

:root {
  color-scheme: light;
  --ink: #1e2528;
  --muted: #657177;
  --line: #d9dedb;
  --paper: #f7f7f4;
  --panel: #ffffff;
  --accent: #1f6f63;
  --accent-dark: #155047;
  --danger: #a13e32;
  --mark: #fff0a6;
  --sidebar-bg: #eef1ed;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

button, input { font: inherit; }

button {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
  min-height: 38px;
  padding: 0 14px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover { border-color: var(--accent); color: var(--accent-dark); }
button:disabled { opacity: 0.6; cursor: not-allowed; }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}
button.primary:hover { background: var(--accent-dark); }
button.danger { color: var(--danger); }

a { color: var(--accent-dark); }

/* ── 版权弹窗 ──────────────────────────────────── */
.gate-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 10000;
  padding: 20px;
}
.gate-modal {
  background: var(--panel);
  border-radius: 12px;
  padding: 32px;
  max-width: 520px;
  width: 100%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
}
.gate-modal h2 {
  margin: 0 0 16px;
  font-size: 22px;
  color: var(--accent-dark);
}
.gate-text { font-size: 14px; line-height: 1.8; color: var(--muted); }
.gate-text p { margin: 0 0 10px; }
.gate-text ul { margin: 8px 0; padding-left: 20px; }
.gate-text li { margin-bottom: 4px; }
.gate-warn { color: var(--danger) !important; font-weight: 600; }
.gate-button {
  display: block; width: 100%; margin-top: 20px;
  background: var(--accent); color: #fff; border: none;
  border-radius: 8px; padding: 12px; font-size: 16px; font-weight: 700;
  cursor: pointer;
}
.gate-button:hover { background: var(--accent-dark); }

/* ── 加载进度 ──────────────────────────────────── */
.loading-overlay {
  position: fixed; inset: 0;
  background: var(--paper);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  padding: 20px;
}
.loading-card {
  text-align: center;
  max-width: 440px;
  width: 100%;
}
.loading-card h2 {
  margin: 0 0 8px;
  font-size: 24px;
  color: var(--accent-dark);
}
.loading-card > p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
}
.progress-track {
  height: 8px;
  background: var(--line);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 12px;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s ease;
}
.progress-track.done .progress-fill { background: #2eaa7b; }
.progress-track.error .progress-fill { background: var(--danger); }
.loading-hint {
  font-size: 12px;
  color: var(--muted);
  opacity: 0.7;
}

/* ── 布局 ──────────────────────────────────────── */
.shell {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  min-height: 100vh;
}
.sidebar {
  border-right: 1px solid var(--line);
  background: var(--sidebar-bg);
  padding: 24px;
  overflow: auto;
  max-height: 100vh;
  position: sticky;
  top: 0;
}
.workspace {
  padding: 28px;
  overflow: auto;
}

/* ── 品牌 ──────────────────────────────────────── */
.brand h1 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
  color: var(--accent-dark);
}
.brand p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

/* ── 面板 ──────────────────────────────────────── */
.panel, .search-card, .answer-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.panel {
  margin-top: 16px;
  padding: 16px;
}
.panel-title {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.panel-title h2 { margin: 0; font-size: 16px; }
.panel-title span { color: var(--muted); font-size: 13px; }

/* ── API 设置面板 ──────────────────────────────── */
.panel-summary {
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  color: var(--ink);
  list-style-position: outside;
  margin: -16px;
  padding: 16px;
}
.panel-summary:hover { color: var(--accent-dark); }
.api-config { margin-top: 14px; }
.api-config label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}
.api-key-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}
.api-key-row input {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 12px;
  background: #fbfcfa;
  font-size: 13px;
}
.api-key-row button {
  min-height: 38px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.api-status {
  font-size: 12px;
  color: var(--accent);
  margin: 6px 0;
}
.api-hint {
  font-size: 12px;
  color: var(--muted);
  margin: 6px 0 0;
  line-height: 1.6;
}

/* ── 资料库列表 ────────────────────────────────── */
.library-list { display: grid; gap: 8px; }
.doc-item {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  background: #fbfcfa;
}
.doc-item h3 { margin: 0; font-size: 14px; line-height: 1.35; }
.doc-item p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.empty {
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  background: #fbfcfa;
  font-size: 13px;
}

/* ── 搜索 ──────────────────────────────────────── */
.search-card { padding: 18px; }
.search-card > label {
  display: block;
  font-weight: 700;
  margin-bottom: 10px;
  font-size: 15px;
}
.search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}
.search-row input {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 14px;
  background: #fbfcfa;
  font-size: 15px;
}
.search-row input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(31,111,99,0.12);
}
.search-row button {
  min-height: 44px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  padding: 0 20px;
}
.controls {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  margin-top: 14px; color: var(--muted); font-size: 13px;
}
.controls label { display: flex; align-items: center; gap: 6px; }
.controls input[type="number"] {
  width: 64px; min-height: 32px;
  border: 1px solid var(--line); border-radius: 6px; padding: 0 8px;
}
.toggle input { width: 15px; height: 15px; }

/* ── 搜索模式选择器 ──────────────────────────────── */
.search-modes {
  display: flex; align-items: center; gap: 2px;
  margin-top: 12px;
}
.mode-label {
  font-size: 13px; font-weight: 600; color: var(--muted);
  margin-right: 8px;
}
.mode-option {
  display: flex; align-items: center;
  padding: 5px 12px;
  border: 1px solid var(--line);
  background: #fbfcfa;
  font-size: 13px; color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.mode-option:first-of-type { border-radius: 6px 0 0 6px; }
.mode-option:last-of-type { border-radius: 0 6px 6px 0; }
.mode-option:has(input:checked) {
  background: var(--accent); border-color: var(--accent);
  color: #fff; font-weight: 600;
}
.mode-option:hover:not(:has(input:checked)) {
  border-color: var(--accent); color: var(--accent-dark);
}
.mode-option input { display: none; }

/* ── 回答面板 ──────────────────────────────────── */
.answer-panel { margin-top: 18px; padding: 18px; }
.answer-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
}
.answer-head h2 { margin: 0; font-size: 17px; }
.answer-head p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.answer-actions { display: flex; gap: 8px; }
.answer-box {
  margin-top: 14px; line-height: 1.8;
  border-top: 1px solid var(--line); padding-top: 14px;
  font-size: 15px;
}
.answer-box p { margin: 0 0 8px; }
.answer-box ol { margin: 8px 0; padding-left: 20px; }
.answer-box li { margin-bottom: 4px; }

/* ── 对话列表 ────────────────────────────────────── */
.conversation-list {
  display: grid; gap: 16px;
  max-height: 600px; overflow-y: auto;
  padding: 8px 0;
}
.conversation-list:empty { display: none; }

.chat-msg { display: flex; }
.chat-msg.chat-user { justify-content: flex-end; }
.chat-msg.chat-assistant { justify-content: flex-start; }

.chat-bubble {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px; line-height: 1.75;
}
.chat-user .chat-bubble {
  background: var(--accent);
  color: #fff;
}
.chat-assistant .chat-bubble {
  background: #f4f6f3;
  border: 1px solid var(--line);
}
.chat-bubble .ai-answer { line-height: 1.85; }
.chat-bubble .streaming { color: var(--ink); }
.chat-bubble .cite { color: var(--accent-dark); font-weight: 600; font-size: 0.85em; }
.chat-bubble .cite-link {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: all 0.15s;
}
.chat-bubble .cite-link:hover sup {
  background: var(--accent);
  color: #fff;
  border-radius: 3px;
  padding: 0 2px;
}
.chat-bubble .error-msg { color: var(--danger); font-weight: 600; }

/* ── 追问输入栏 ──────────────────────────────────── */
.quick-ask-bar {
  display: flex; gap: 8px;
  padding: 10px 0 0;
  border-top: 1px solid var(--line);
  position: sticky; bottom: 0;
  background: var(--panel);
  margin-top: 8px;
}
.quick-ask-bar input {
  flex: 1; min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  font-size: 14px;
  background: #fbfcfa;
}
.quick-ask-bar input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(31,111,99,0.12);
}
.quick-ask-bar button {
  min-height: 40px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 0 18px;
}
.quick-ask-bar button:disabled { opacity: 0.6; }

/* AI 流式输出 */
.streaming { color: var(--ink); }
.cursor {
  display: inline;
  animation: blink 0.7s step-end infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }
.ai-answer { line-height: 1.85; }
.ai-answer .cite { color: var(--accent); font-weight: 600; font-size: 0.85em; }
.error-msg { color: var(--danger); font-weight: 600; }

/* ── 结果列表 ──────────────────────────────────── */
.results-wrap { margin-top: 22px; }
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
}
.section-head h2 { margin: 0; font-size: 17px; }
.section-head span { color: var(--muted); font-size: 13px; }
.results { display: grid; gap: 14px; margin-top: 12px; }

.result-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  scroll-margin-top: 24px;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.result-card:target {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(31,111,99,0.15);
}
.result-meta {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline;
  margin-bottom: 6px;
}
.result-work {
  font-size: 15px;
  color: var(--accent-dark);
}
.result-chapter {
  font-size: 13px;
  color: var(--muted);
}
.result-meta-secondary {
  display: flex; gap: 12px; align-items: center;
  margin-bottom: 10px;
  font-size: 12px; color: var(--muted);
}
.result-source {
  color: var(--accent);
  text-decoration: none;
  font-size: 12px;
}
.result-source:hover { text-decoration: underline; }
.snippet {
  line-height: 1.8; margin: 0; font-size: 14px;
}
mark {
  background: var(--mark); padding: 0 2px; border-radius: 1px;
}
details { margin-top: 12px; }
summary {
  cursor: pointer; color: var(--accent-dark); font-weight: 600;
  font-size: 13px;
}
pre {
  white-space: pre-wrap; word-break: break-word;
  background: #f4f6f3; border: 1px solid var(--line);
  border-radius: 6px; padding: 12px; line-height: 1.8;
  font-size: 14px; max-height: 400px; overflow: auto;
}

/* ── 响应式 ────────────────────────────────────── */
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    border-right: 0; border-bottom: 1px solid var(--line);
    max-height: none; position: static;
    padding: 18px;
  }
  .workspace { padding: 16px; }
  .search-row { grid-template-columns: 1fr; }
  .brand h1 { font-size: 18px; }
  .answer-actions { width: 100%; }
  .answer-actions button { flex: 1; }
  .controls { gap: 10px; }
  .gate-modal { padding: 20px; margin: 12px; }
  .gate-modal h2 { font-size: 18px; }
}