/* ---------- Theme tokens ---------- */
:root,
body[data-theme="paper"] {
  --bg: #f6f1e7;
  --bg-panel: #efe8d8;
  --bg-page: #fbf8f1;
  --ink: #2c2620;
  --ink-soft: #6b6053;
  --ink-faint: #9a9081;
  --accent: #6b8f80;
  --accent-ink: #ffffff;
  --border: #e1d8c4;
  --border-strong: #cabe9f;
  --shadow: 0 10px 30px rgba(60, 45, 20, 0.08);
  --code-bg: #efe6d2;
  --link: #7a5c3e;
}

body[data-theme="sepia"] {
  --bg: #ecdcc0;
  --bg-panel: #e4d0ac;
  --bg-page: #f3e6cc;
  --ink: #3a2c18;
  --ink-soft: #715c3d;
  --ink-faint: #99835f;
  --accent: #9c6b3e;
  --accent-ink: #fff8ec;
  --border: #d9c39c;
  --border-strong: #c3a877;
  --shadow: 0 10px 30px rgba(60, 35, 10, 0.12);
  --code-bg: #e2cea6;
  --link: #7a4a1f;
}

body[data-theme="dusk"] {
  --bg: #1b1d22;
  --bg-panel: #202329;
  --bg-page: #23262c;
  --ink: #e8e6df;
  --ink-soft: #a9a79f;
  --ink-faint: #757469;
  --accent: #8fb3a3;
  --accent-ink: #14171a;
  --border: #33363d;
  --border-strong: #40444c;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --code-bg: #2a2d33;
  --link: #a9c9ba;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, "Times New Roman", serif;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

.app {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 24px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.topbar-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-mark {
  font-size: 22px;
  color: var(--accent);
}

.topbar-heading h1 {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.topbar-heading p {
  margin: 1px 0 0;
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: system-ui, sans-serif;
}

.topbar-search {
  flex: 1 1 280px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 200px;
}

#searchInput {
  width: 100%;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--ink);
  font-family: system-ui, sans-serif;
  font-size: 13.5px;
  outline: none;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

#searchInput:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.search-count {
  font-family: system-ui, sans-serif;
  font-size: 12px;
  color: var(--ink-faint);
  white-space: nowrap;
}

.topbar-themes {
  display: flex;
  gap: 6px;
  font-family: system-ui, sans-serif;
}

.theme-btn {
  border: 1px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--ink-soft);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.theme-btn:hover { color: var(--ink); }

.theme-btn.active {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

/* ---------- Body layout ---------- */
.body {
  flex: 1;
  display: flex;
  min-height: 0;
}

/* ---------- Table of contents ---------- */
.toc {
  width: 300px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
}

.toc-inner {
  padding: 18px 10px 40px;
}

.toc-group {
  margin-bottom: 6px;
}

.toc-group-label {
  font-family: system-ui, sans-serif;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  padding: 10px 12px 4px;
}

.toc-persona {
  border-radius: 10px;
  margin: 2px 6px;
}

.toc-persona-btn {
  width: 100%;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  background: none;
  border: none;
  text-align: left;
  padding: 9px 10px;
  cursor: pointer;
  border-radius: 8px;
  font-family: system-ui, sans-serif;
  color: var(--ink);
}

.toc-persona-btn:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }

.toc-persona-name {
  font-size: 13.5px;
  font-weight: 600;
}

.toc-persona-caret {
  font-size: 10px;
  color: var(--ink-faint);
  transition: transform 0.15s ease;
}

.toc-persona.open .toc-persona-caret { transform: rotate(90deg); }

.toc-scenarios {
  display: none;
  padding: 2px 4px 6px 14px;
}

.toc-persona.open .toc-scenarios { display: block; }

.toc-scenario-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-left: 2px solid var(--border);
  padding: 7px 10px;
  margin: 1px 0;
  cursor: pointer;
  font-family: system-ui, sans-serif;
  font-size: 12.5px;
  color: var(--ink-soft);
  border-radius: 0 6px 6px 0;
}

.toc-scenario-btn:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.toc-scenario-btn.active {
  color: var(--accent-ink);
  background: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

.toc-hidden { display: none !important; }

.toc-empty {
  padding: 16px 14px;
  font-family: system-ui, sans-serif;
  font-size: 13px;
  color: var(--ink-faint);
}

.toc-toggle {
  display: none;
  position: fixed;
  bottom: 18px;
  left: 18px;
  z-index: 20;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  padding: 10px 16px;
  border-radius: 999px;
  font-family: system-ui, sans-serif;
  font-size: 13px;
  box-shadow: var(--shadow);
  cursor: pointer;
}

/* ---------- Page ---------- */
.page-wrap {
  flex: 1;
  overflow-y: auto;
  display: flex;
  justify-content: center;
  padding: 40px 24px 20px;
}

.page {
  width: 100%;
  max-width: 720px;
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 48px 56px 56px;
  min-height: 70vh;
  animation: pageIn 0.28s ease;
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-kicker {
  font-family: system-ui, sans-serif;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 10px;
}

.page-title {
  font-size: 30px;
  line-height: 1.25;
  margin: 0 0 6px;
}

.page-subtitle {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 18px;
  font-style: italic;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-family: system-ui, sans-serif;
  font-size: 11.5px;
  color: var(--ink-faint);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  margin-bottom: 28px;
}

.page-meta b { color: var(--ink-soft); font-weight: 600; }

.page-body {
  font-size: 17px;
  line-height: 1.75;
}

.page-body h1, .page-body h2, .page-body h3, .page-body h4 {
  font-family: inherit;
  line-height: 1.3;
  margin: 1.6em 0 0.5em;
}

.page-body h3 { font-size: 1.18em; color: var(--ink); }
.page-body h4 { font-size: 1.05em; color: var(--ink-soft); }

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

.page-body ul, .page-body ol {
  margin: 0 0 1.1em;
  padding-left: 1.4em;
}

.page-body li { margin: 0.35em 0; }

.page-body strong { color: var(--ink); }

.page-body em { color: var(--ink-soft); }

.page-body mark {
  background: color-mix(in srgb, var(--accent) 35%, transparent);
  color: inherit;
  border-radius: 3px;
  padding: 0 2px;
}

.page-body code {
  font-family: "SFMono-Regular", Consolas, monospace;
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.86em;
}

.page-body blockquote {
  margin: 0 0 1.1em;
  padding: 4px 18px;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
  font-style: italic;
}

.page-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.8em 0;
}

.page-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.3em;
  font-size: 0.88em;
  font-family: system-ui, sans-serif;
}

.page-body th, .page-body td {
  border: 1px solid var(--border-strong);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.page-body th {
  background: var(--bg-panel);
  font-weight: 600;
}

.page-missing {
  color: var(--ink-faint);
  font-style: italic;
}

.page-empty {
  text-align: center;
  color: var(--ink-faint);
  font-family: system-ui, sans-serif;
  padding: 80px 20px;
}

/* ---------- Page nav ---------- */
.page-nav {
  max-width: 720px;
  margin: 14px auto 40px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 4px;
}

.nav-btn {
  font-family: system-ui, sans-serif;
  font-size: 13px;
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  color: var(--ink);
  padding: 9px 16px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.nav-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.nav-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.page-progress {
  flex: 1;
  font-family: system-ui, sans-serif;
}

#progressLabel {
  display: block;
  font-size: 11.5px;
  color: var(--ink-faint);
  margin-bottom: 5px;
  text-align: center;
}

.progress-track {
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.2s ease;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .toc {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 15;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: var(--shadow);
  }

  .toc.open { transform: translateX(0); }

  .toc-toggle { display: block; }

  .page-wrap { padding: 24px 14px 10px; }

  .page { padding: 32px 24px 40px; }

  .page-title { font-size: 25px; }
}

@media (max-width: 560px) {
  .topbar { gap: 12px; padding: 12px 14px; }
  .topbar-themes { order: 3; width: 100%; justify-content: center; }
}