/* ── Smooth scroll for anchor links ──────────── */
html:has(body.gen-book) {
  scroll-behavior: smooth;
}

.gen-book .navbar {
  border-bottom: none;
}

/* ── Hero ────────────────────────────────────── */
.gb-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  min-height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gb-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(44, 36, 22, 0.6),
    rgba(44, 36, 22, 0.78)
  );
  display: flex;
  align-items: center;
  justify-content: center;
}

.gb-hero-content {
  position: relative;
  text-align: center;
  color: #fff;
  padding: 60px 20px;
  max-width: 780px;
}

.gb-hero-label {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 13px;
  font-weight: 400;
  font-variant: small-caps;
  text-transform: lowercase;
  letter-spacing: 3px;
  opacity: 0.75;
  margin: 0 0 16px 0;
}

.gb-hero-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  margin: 0 0 12px 0;
  text-transform: none;
  letter-spacing: 1px;
}

.gb-hero-subtitle {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 20px;
  font-style: italic;
  opacity: 0.85;
  margin: 0 0 28px 0;
  line-height: 1.4;
}

.gb-hero-tagline {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 17px;
  line-height: 1.65;
  opacity: 0.8;
  max-width: none;
  margin: 0 auto 36px;
  text-align: center;
}

.gb-hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ─────────────────────────────────── */
.gb-btn {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 14px;
  font-weight: 400;
  font-variant: small-caps;
  text-transform: lowercase;
  letter-spacing: 1.5px;
  padding: 12px 32px;
  border-radius: 0;
  border: 2px solid;
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
  display: inline-block;
}

.gb-btn-primary {
  background-color: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.gb-btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  text-decoration: none;
  color: #fff;
}

.gb-btn-secondary {
  background-color: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.gb-btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  color: #fff;
}

/* ── Sections ────────────────────────────────── */
.gb-section {
  padding: 72px 20px;
}

.gb-section-alt {
  background-color: rgba(184, 168, 138, 0.12);
}

.gb-container {
  max-width: 860px;
  margin: 0 auto;
}

.gb-section-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 28px 0;
  text-transform: none;
  letter-spacing: 0.5px;
  text-align: center;
  position: relative;
  padding-bottom: 16px;
}

/* Ornamental underline for section titles */
.gb-section-title::after {
  content: '\2014\2003\2766\2003\2014';
  display: block;
  text-align: center;
  color: var(--rule-light);
  font-size: 14px;
  margin-top: 8px;
  letter-spacing: 0;
}

/* ── Prose ────────────────────────────────────── */
.gb-prose {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 18px;
  line-height: 1.7;
  color: var(--text);
}

.gb-prose p {
  margin: 0 0 18px 0;
  font-size: inherit;
  line-height: inherit;
  text-align: left;
}

.gb-prose a {
  color: var(--accent);
  text-decoration: none;
}

.gb-prose a:hover {
  text-decoration: underline;
}

/* ── Feature cards (learning goals) ──────────── */
.gb-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 36px 0;
}

.gb-feature {
  background: var(--bg);
  border-radius: 0;
  padding: 24px 28px;
  border: 1px solid var(--rule-light);
  border-top: 3px solid var(--rule-dark);
}

.gb-feature h3 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 6px 0;
}

.gb-feature p {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--secondary);
  margin: 0;
  text-align: left;
}

/* ── Reading legend ──────────────────────────── */
.gb-legend {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 14px;
  color: var(--secondary);
  margin-bottom: 28px;
  letter-spacing: 0.3px;
}

.gb-legend span {
  margin-right: 18px;
  white-space: nowrap;
}

/* ── Topic cards (expandable) ────────────────── */
.gb-topic {
  background: var(--bg);
  border-radius: 0;
  padding: 22px 26px;
  margin-bottom: 14px;
  border: 1px solid var(--rule-light);
  border-left: none;
  border-top: 2px solid var(--rule-dark);
}

.gb-topic-header {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.gb-topic-header::-webkit-details-marker { display: none; }

.gb-topic-header .gb-topic-title {
  flex: 1;
  margin: 0;
}

.gb-topic-header .gb-week {
  float: none;
  flex-shrink: 0;
}

.gb-topic-header::after {
  content: '';
  display: block;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--secondary);
  border-bottom: 2px solid var(--secondary);
  transform: rotate(45deg);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.gb-topic[open] .gb-topic-header::after {
  transform: rotate(-135deg);
}

.gb-topic-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 10px 0;
}

.gb-topic ul {
  list-style: none;
  padding: 0;
  margin: 12px 0 0 0;
}

.gb-topic li {
  position: relative;
  padding-left: 1.5em;
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 5px;
  color: var(--text);
}

.gb-topic li::before {
  position: absolute;
  left: 0.15em;
  top: 0.1em;
  font-size: 90%;
}

.gb-topic li.star::before   { content: "\2605"; color: var(--accent); }
.gb-topic li.note::before   { content: "\1F3B6"; left: 0; font-size: 75%; }
.gb-topic li.bullet::before { content: "\2022"; font-size: 130%; color: var(--secondary); }
.gb-topic li.book::before   { content: "\1F4D6"; font-size: 65%; }

.gb-topic a {
  color: var(--accent);
  text-decoration: none;
}

.gb-topic a:hover {
  text-decoration: underline;
}

/* ── Grading items ───────────────────────────── */
.gb-grading-item {
  margin-bottom: 24px;
}

.gb-grading-item:last-child {
  margin-bottom: 0;
}

.gb-grading-item h3 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 6px 0;
  font-variant: small-caps;
  text-transform: lowercase;
  letter-spacing: 1px;
}

.gb-grading-item p {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  margin: 0;
  text-align: left;
}

.gb-grading-item a {
  color: var(--accent);
  text-decoration: none;
}

.gb-grading-item a:hover {
  text-decoration: underline;
}

/* ── Week labels on topic cards ──────────────── */
.gb-week {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 11px;
  font-weight: 400;
  color: var(--secondary);
  font-variant: small-caps;
  text-transform: lowercase;
  letter-spacing: 1px;
  float: right;
  margin-top: 4px;
}

/* ── Chat widget ─────────────────────────────── */
.chat-toggle {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(44, 36, 22, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, transform 0.2s;
  z-index: 1000;
}

.chat-toggle:hover {
  background-color: var(--accent-hover);
  transform: scale(1.05);
}

.chat-toggle svg {
  width: 26px;
  height: 26px;
  fill: #fff;
}

.chat-panel {
  position: fixed;
  bottom: 96px;
  right: 28px;
  width: 380px;
  max-height: 520px;
  background: var(--bg);
  border-radius: 0;
  border: 1px solid var(--rule-light);
  box-shadow: 0 8px 32px rgba(44, 36, 22, 0.15);
  display: none;
  flex-direction: column;
  z-index: 1001;
  overflow: hidden;
}

.chat-panel.open {
  display: flex;
}

.chat-header {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 15px;
  font-weight: 400;
  font-variant: small-caps;
  text-transform: lowercase;
  letter-spacing: 1px;
  color: #fff;
  background-color: var(--accent);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-header-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  opacity: 0.7;
  padding: 0;
  line-height: 1;
}

.chat-header-close:hover {
  opacity: 1;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  min-height: 280px;
  max-height: 360px;
  background-color: var(--bg);
}

.chat-msg {
  margin-bottom: 14px;
  max-width: 85%;
}

.chat-msg-user {
  margin-left: auto;
}

.chat-msg-assistant {
  margin-right: auto;
}

.chat-msg-bubble {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 14px;
  line-height: 1.5;
  padding: 10px 14px;
  border-radius: 0;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.chat-msg-user .chat-msg-bubble {
  background-color: var(--accent);
  color: #fff;
  border-bottom-right-radius: 0;
}

.chat-msg-assistant .chat-msg-bubble {
  background-color: rgba(184, 168, 138, 0.2);
  color: var(--text);
  border-bottom-left-radius: 0;
}

.chat-msg-assistant .chat-msg-bubble a {
  color: var(--accent);
}

.chat-input-area {
  display: flex;
  border-top: 1px solid var(--rule-light);
  background: var(--bg);
}

.chat-input {
  flex: 1;
  border: none;
  padding: 14px 16px;
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 14px;
  outline: none;
  background: transparent;
  color: var(--text);
}

.chat-input::placeholder {
  color: var(--secondary);
}

.chat-send {
  background: none;
  border: none;
  color: var(--accent);
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 13px;
  font-weight: 400;
  font-variant: small-caps;
  text-transform: lowercase;
  letter-spacing: 1px;
  padding: 14px 16px;
  cursor: pointer;
}

.chat-send:hover {
  color: var(--accent-hover);
}

.chat-send:disabled {
  color: var(--rule-light);
  cursor: default;
}

.chat-typing {
  font-family: 'Source Serif 4', 'Source Serif Pro', serif;
  font-size: 13px;
  color: var(--secondary);
  font-style: italic;
  padding: 4px 16px 8px;
}

/* ── Mobile ──────────────────────────────────── */
@media (max-width: 768px) {
  .gb-hero {
    min-height: 380px;
  }

  .gb-hero-content {
    padding: 40px 16px;
  }

  .gb-hero-title {
    font-size: 34px;
  }

  .gb-hero-subtitle {
    font-size: 17px;
  }

  .gb-hero-tagline {
    font-size: 15px;
  }

  .gb-section {
    padding: 48px 16px;
  }

  .gb-section-title {
    font-size: 24px;
  }

  .gb-features {
    grid-template-columns: 1fr;
  }

  .gb-prose {
    font-size: 16px;
  }

  .gb-topic {
    padding: 18px 20px;
  }

  .gb-topic-title {
    font-size: 17px;
  }

  .gb-topic li {
    font-size: 14px;
  }

  .gb-grading-item p {
    font-size: 15px;
  }

  .chat-panel {
    right: 12px;
    bottom: 84px;
    width: calc(100vw - 24px);
    max-height: 70vh;
  }

  .chat-toggle {
    bottom: 18px;
    right: 18px;
    width: 50px;
    height: 50px;
  }
}