/* ==========================================================
   MD Reader · HackMD 風格(白底黑字)
   ========================================================== */

:root {
  /* 表面色 */
  --bg-page: #ffffff;
  --bg-soft: #f6f8fa;
  --bg-sidebar: #fafbfc;
  --bg-code: #f4f5f7;
  --bg-quote: #f6f8fa;

  /* 文字 */
  --text-main: #36404a;
  --text-heading: #1f2328;
  --text-soft: #57606a;
  --text-mute: #8b949e;

  /* 強調(HackMD 標誌色) */
  --accent: #2f6f9f;
  --accent-strong: #1f5278;
  --accent-soft: #e7f0f7;
  --warn: #c9484a;
  --warn-soft: #fbeaea;

  /* 結構 */
  --border: #e1e4e8;
  --border-strong: #d0d7de;
  --shadow-sm: 0 1px 2px rgba(27, 31, 36, 0.04);
  --shadow-md: 0 4px 12px rgba(27, 31, 36, 0.08);

  --sidebar-w: 280px;
  --topbar-h: 56px;
  --content-max: 860px;
  --reading-font-size: 16px;
  --reading-line-height: 1.85;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-page);
  color: var(--text-main);
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'Microsoft JhengHei', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Topbar ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: var(--bg-page);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.brand-name {
  font-weight: 700;
  font-size: 18px;
  color: var(--text-heading);
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.05em;
}

.brand:hover .brand-name { color: var(--accent); }

/* ===== 閱讀模式:隱藏 topbar ===== */
body.reading .topbar { display: none; }
body.reading .sidebar { top: 0; height: 100vh; }
body.reading .layout { min-height: 100vh; }
body.reading .floating-menu { display: none; }

@media (max-width: 768px) {
  body.reading .floating-menu { display: flex; }
}

/* ===== 浮動漢堡按鈕(僅行動版閱讀時顯示) ===== */
.floating-menu {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 90;
  width: 42px;
  height: 42px;
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.floating-menu span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-heading);
  border-radius: 2px;
  transition: 0.3s;
}

.floating-menu.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.floating-menu.open span:nth-child(2) { opacity: 0; }
.floating-menu.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Layout ===== */
.layout {
  display: flex;
  flex: 1;
  min-height: calc(100vh - var(--topbar-h));
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--bg-sidebar);
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  transition: transform 0.3s ease;
}

.sidebar-inner { padding: 24px 18px; }

.nav-title {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-mute);
  margin: 0 0 14px 4px;
  font-weight: 700;
  text-transform: uppercase;
}

/* ===== HackMD 風 TOC ===== */
.toc {
  font-size: 13px;
  line-height: 1.5;
}

.toc-empty {
  color: var(--text-mute);
  font-size: 12px;
  padding: 10px 6px;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 1px solid var(--border);
}

.toc-item { margin: 0; position: relative; }

.toc-list a {
  display: block;
  padding: 5px 10px 5px 12px;
  color: var(--text-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  word-break: break-word;
  line-height: 1.4;
}

.toc-list a:hover {
  color: var(--accent);
  background: var(--accent-soft);
  border-left-color: var(--accent);
}

.toc-list a.active {
  color: var(--accent-strong);
  border-left-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}

.toc-h1 > a {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-heading);
  padding-left: 12px;
}
.toc-h2 > a { padding-left: 26px; font-size: 13px; color: var(--text-soft); }
.toc-h3 > a { padding-left: 40px; font-size: 12.5px; color: var(--text-mute); }
.toc-h4 > a { padding-left: 54px; font-size: 12px; color: var(--text-mute); opacity: 0.85; }

/* ===== Content ===== */
.content {
  flex: 1;
  padding: 36px 48px;
  max-width: calc(100vw - var(--sidebar-w));
  background: var(--bg-page);
}

.welcome {
  max-width: var(--content-max);
  margin: 0 auto;
}

.welcome h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-heading);
  margin: 8px 0 12px;
  letter-spacing: 0.01em;
}

.welcome .lead {
  font-size: 16px;
  color: var(--text-soft);
  margin-bottom: 32px;
}

.collection-title {
  font-size: 18px;
  color: var(--text-heading);
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
}

.collection {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 20px;
  margin: 12px 0 24px;
}

.collection-name {
  font-size: 16px;
  margin: 0 0 4px;
  color: var(--text-heading);
  font-weight: 700;
}

.collection-desc {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--text-soft);
}

.collection-meta {
  margin: 12px 0 0;
  padding: 10px 14px;
  background: var(--warn-soft);
  border-left: 3px solid var(--warn);
  border-radius: 4px;
  font-size: 13px;
  color: var(--warn);
}

.quick-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.quick-links li {
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.15s, box-shadow 0.15s;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
}

.quick-links li:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.quick-links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  flex-shrink: 0;
  min-width: 140px;
}

.quick-links a:hover { text-decoration: underline; }

.quick-links span {
  color: var(--text-soft);
  font-size: 13px;
}

.how-to {
  padding-left: 1.4em;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.8;
}

.how-to code {
  background: var(--bg-code);
  color: var(--text-heading);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

/* ===== Markdown 渲染(HackMD 風) ===== */
.document {
  max-width: var(--content-max);
  margin: 0 auto;
  position: relative;
}

.markdown-body {
  font-size: var(--reading-font-size);
  line-height: var(--reading-line-height);
  color: var(--text-main);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  color: var(--text-heading);
  margin-top: 1.6em;
  margin-bottom: 0.6em;
  font-weight: 700;
  line-height: 1.35;
}

.markdown-body h1 {
  font-size: 30px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4em;
  margin-top: 0.5em;
}

.markdown-body h2 {
  font-size: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
}

.markdown-body h3 { font-size: 20px; }
.markdown-body h4 { font-size: 17px; }
.markdown-body h5 { font-size: 15px; color: var(--text-soft); }
.markdown-body h6 { font-size: 14px; color: var(--text-mute); }

.markdown-body p {
  margin: 1em 0;
}

.markdown-body strong { color: var(--text-heading); font-weight: 700; }
.markdown-body em { font-style: italic; }

.markdown-body a {
  color: var(--accent);
  text-decoration: none;
}

.markdown-body a:hover {
  text-decoration: underline;
  color: var(--accent-strong);
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.6em;
  margin: 0.8em 0;
}

.markdown-body li { margin: 0.3em 0; }

.markdown-body blockquote {
  margin: 1.2em 0;
  padding: 10px 16px;
  background: var(--bg-quote);
  border-left: 4px solid var(--border-strong);
  color: var(--text-soft);
  border-radius: 0 4px 4px 0;
}

.markdown-body blockquote p { margin: 0.4em 0; }

.markdown-body code {
  background: var(--bg-code);
  color: #c7254e;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

.markdown-body pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 18px;
  overflow-x: auto;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 13.5px;
  line-height: 1.6;
}

.markdown-body pre code {
  background: transparent;
  color: var(--text-main);
  padding: 0;
  font-size: inherit;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

/* 圖片(NPC 立繪等):右側浮動排版 */
.markdown-body img {
  max-width: 220px;
  width: 40%;
  min-width: 160px;
  height: auto;
  float: right;
  margin: 4px 0 16px 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  box-shadow: var(--shadow-sm);
}

.markdown-body h3 { clear: both; }

/* 全寬封面 — 取消浮動、置中、滿版 */
.markdown-body .cover-art {
  margin: 1.5em 0 2em;
  text-align: center;
}

.markdown-body .cover-art img {
  float: none;
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  margin: 0 auto;
  border: none;
  background: transparent;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border-radius: 12px;
}

/* 角色建立 22 張塔羅卡——以圖為主的獨立區塊 */
.markdown-body .char-card {
  margin: 2em 0;
  padding: 1.4em 1.6em 1.2em;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-soft);
  box-shadow: var(--shadow-sm);
  overflow: hidden; /* 包住內部的 float */
}

.markdown-body .char-card h3 {
  margin: 0 0 0.7em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--border);
}

.markdown-body .char-card img {
  float: right;
  width: 280px;
  max-width: 42%;
  min-width: 200px;
  margin: 0 0 14px 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  box-shadow: var(--shadow-sm);
}

.markdown-body .char-card p {
  margin: 0.6em 0;
}

/* 行動裝置：圖文上下堆疊，圖片佔滿寬度 */
@media (max-width: 720px) {
  .markdown-body .char-card {
    padding: 1em 1em 0.8em;
  }
  .markdown-body .char-card img {
    float: none;
    display: block;
    width: 100%;
    max-width: 360px;
    margin: 0 auto 14px;
  }
}

/* 並排立繪 */
.markdown-body .npc-forms {
  float: right;
  display: flex;
  gap: 10px;
  width: 50%;
  max-width: 340px;
  min-width: 240px;
  margin: 4px 0 16px 24px;
}

.markdown-body .npc-forms figure {
  flex: 1;
  margin: 0;
  min-width: 0;
}

.markdown-body .npc-forms img {
  float: none;
  display: block;
  width: 100%;
  max-width: none;
  min-width: 0;
  margin: 0;
}

.markdown-body .npc-forms figcaption {
  text-align: center;
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.04em;
  margin-top: 6px;
}

/* 表格 */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

.markdown-body th {
  background: var(--bg-soft);
  color: var(--text-heading);
  font-weight: 700;
}

.markdown-body tbody tr:nth-child(even) {
  background: var(--bg-soft);
}

/* ===== Loader & Error ===== */
.loader,
.error {
  max-width: var(--content-max);
  margin: 60px auto;
  text-align: center;
  color: var(--text-soft);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 14px;
  animation: spin 0.9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.error {
  padding: 16px 20px;
  background: var(--warn-soft);
  border: 1px solid var(--warn);
  border-radius: 6px;
  color: var(--warn);
}

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--text-soft);
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s, color 0.15s, border-color 0.15s;
  box-shadow: var(--shadow-md);
  z-index: 50;
}

.back-to-top.show { opacity: 1; visibility: visible; }

.back-to-top::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-top: 2px solid currentColor;
  border-left: 2px solid currentColor;
  transform: rotate(45deg) translate(1px, 1px);
}

.back-to-top:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ===== Footer ===== */
.footer {
  padding: 20px 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-mute);
  border-top: 1px solid var(--border);
  background: var(--bg-page);
}

.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ===== Hidden util ===== */
.hidden { display: none !important; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .content { padding: 28px 28px; }
}

@media (max-width: 768px) {
  :root {
    --sidebar-w: 260px;
    --reading-font-size: 15.5px;
    --reading-line-height: 1.8;
  }

  .topbar { padding: 0 16px; }
  .brand-tag { display: none; }

  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    height: calc(100vh - var(--topbar-h));
    transform: translateX(-100%);
    z-index: 80;
    background: var(--bg-page);
    box-shadow: 4px 0 14px rgba(0, 0, 0, 0.1);
  }

  body.reading .sidebar { top: 0; height: 100vh; }
  .sidebar.open { transform: translateX(0); }

  .content { padding: 22px 18px; max-width: 100vw; }

  .welcome h1 { font-size: 26px; }

  .quick-links li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .quick-links a { min-width: 0; }

  .markdown-body h1 { font-size: 24px; }
  .markdown-body h2 { font-size: 20px; }
  .markdown-body h3 { font-size: 17px; }
  .markdown-body h4 { font-size: 15px; }

  .markdown-body img {
    float: none;
    display: block;
    width: 70%;
    max-width: 280px;
    min-width: 0;
    margin: 12px auto 16px;
  }

  .markdown-body .npc-forms {
    float: none;
    width: 90%;
    max-width: 360px;
    min-width: 0;
    margin: 14px auto 16px;
  }

  .markdown-body .npc-forms img { width: 100%; }

  .back-to-top { bottom: 16px; right: 16px; width: 38px; height: 38px; }

  body.menu-open::after {
    content: '';
    position: fixed;
    inset: var(--topbar-h) 0 0 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 70;
  }
  body.reading.menu-open::after { inset: 0; }
}

@media (max-width: 420px) {
  .topbar { padding: 0 12px; }
  .content { padding: 18px 14px; }
  .welcome h1 { font-size: 22px; }
}

/* ===== 列印樣式 ===== */
@media print {
  .topbar, .sidebar, .footer, .back-to-top, .floating-menu { display: none !important; }
  .content { padding: 0; max-width: 100%; }
  .markdown-body img { float: none; display: block; margin: 12px auto; }
}