/* ==========================================================================
   The Story of Montsoriu - Main Design System & Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens & CSS Variables (Dark by Default, Light with [data-theme="light"])
   -------------------------------------------------------------------------- */
:root,
[data-theme="dark"] {
  /* Color Palette - Dark Obsidian Edition */
  --bg-main: #0c1015;
  --bg-surface: #141c24;
  --bg-glass: rgba(18, 26, 36, 0.85);

  --text-primary: #f2eee6;
  --text-muted: #8594a6;

  --accent-gold: #e5a947;
  --accent-gold-light: #f5c86e;
  --accent-gold-dark: #b37318;
  --accent-gold-glow: rgba(229, 169, 71, 0.25);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(229, 169, 71, 0.3);
  --border-gold-strong: rgba(229, 169, 71, 0.6);

  --body-radial-1: rgba(229, 169, 71, 0.08);
  --body-radial-2: rgba(59, 122, 87, 0.06);
  --body-radial-3: rgba(217, 119, 54, 0.05);

  /* Typography */
  --font-display: "Cinzel", "Cinzel Decorative", Georgia, "Times New Roman", serif;
  --font-script: "Great Vibes", "Cinzel Decorative", cursive;
  --font-reading: "Lora", "Merriweather", Georgia, serif;
  --font-ui: "Plus Jakarta Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Shadows */
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);

  /* Layout & Spacing */
  --container-max: 1100px;
  --container-reading: 740px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  /* Color Palette - Warm Antique Parchment Edition */
  --bg-main: #f9f6ef;
  --bg-surface: #f0eae0;
  --bg-glass: rgba(249, 246, 239, 0.92);

  --text-primary: #231b14;
  --text-muted: #796b5e;

  --accent-gold: #b37318;
  --accent-gold-light: #8e580e;
  --accent-gold-dark: #8e580e;
  --accent-gold-glow: rgba(179, 115, 24, 0.2);

  --border-subtle: rgba(35, 27, 20, 0.1);
  --border-gold: rgba(179, 115, 24, 0.35);
  --border-gold-strong: rgba(179, 115, 24, 0.65);

  --body-radial-1: rgba(179, 115, 24, 0.06);
  --body-radial-2: rgba(40, 96, 67, 0.04);
  --body-radial-3: rgba(181, 79, 18, 0.04);

  --shadow-md: 0 8px 24px rgba(35, 27, 20, 0.12);
}

/* --------------------------------------------------------------------------
   Reset & Global Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-main);
  color: var(--text-primary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-ui);
  line-height: 1.6;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, var(--body-radial-1), transparent 70%),
    radial-gradient(ellipse 60% 40% at 85% 30%, var(--body-radial-2), transparent 60%),
    radial-gradient(ellipse 70% 50% at 10% 70%, var(--body-radial-3), transparent 60%),
    var(--bg-main);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

img,
picture {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

a:not(.btn) {
  color: var(--accent-gold-light);
}

[data-theme="light"] a:not(.btn) {
  color: var(--accent-gold);
}

a:not(.btn):hover {
  color: var(--accent-gold);
}

[data-theme="light"] a:not(.btn):hover {
  color: #000000;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 1.5rem;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.cover-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: transparent;
  border-bottom: 1px solid transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  z-index: 100;
  transition: background 0.35s ease, border-color 0.35s ease, backdrop-filter 0.35s ease;
}

.cover-header.is-scrolled,
.chapter-cover-header {
  background: var(--bg-glass);
  border-bottom-color: var(--border-subtle);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.cover-header:not(.is-scrolled):not(.chapter-cover-header) .brand-name {
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.85);
  transition: all var(--transition-smooth);
}

.cover-header:not(.is-scrolled):not(.chapter-cover-header) .brand-tagline {
  color: rgba(255, 255, 255, 0.75);
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.85);
  transition: all var(--transition-smooth);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--text-primary);
}

.brand-link:hover {
  color: var(--accent-gold-light);
}

.brand-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.5));
  transition: transform var(--transition-smooth);
}

.brand-link:hover .brand-logo {
  transform: scale(1.08) rotate(-3deg);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-gold-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .brand-name {
  background: linear-gradient(135deg, #231b14 40%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .cover-header:not(.is-scrolled):not(.chapter-cover-header) .brand-name {
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-gold-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.85);
}

[data-theme="light"] .cover-header:not(.is-scrolled):not(.chapter-cover-header) .brand-tagline {
  color: rgba(255, 255, 255, 0.75);
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.85);
}

[data-theme="light"] .cover-header.is-scrolled .brand-name,
[data-theme="light"] .chapter-cover-header .brand-name {
  background: linear-gradient(135deg, #231b14 40%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
}

[data-theme="light"] .cover-header.is-scrolled .brand-tagline,
[data-theme="light"] .chapter-cover-header .brand-tagline {
  color: var(--text-muted);
  text-shadow: none;
}

.brand-tagline {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* --------------------------------------------------------------------------
   Sleeping Montsoriu Cat on Chapter Navigation Bar
   -------------------------------------------------------------------------- */
.header-sleeping-cat {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  /* Montsoriu's flat resting baseline in the SVG is at y=200/250 (80% down). */
  /* For height=65px, the flat line is 13px above the bottom of the SVG. */
  /* Setting bottom: -13px relative to .chapter-cover-header aligns the flat resting line */
  /* precisely with the bottom border (0px) of the navigation bar, while the dangling paw */
  /* and tail hang 13px below the navbar edge into the page content. */
  bottom: -13px;
  z-index: 105;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
}

.sleeping-cat-img {
  width: 135px;
  height: 65px;
  display: block;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
}

/* Hide sleeping cat on devices without enough horizontal room in the header */
@media (max-width: 720px) {
  .header-sleeping-cat {
    display: none !important;
  }
}

/* On medium screens (721px - 940px), position cat nicely between brand and actions */
@media (min-width: 721px) and (max-width: 940px) {
  .header-sleeping-cat {
    left: auto;
    right: 115px;
    transform: none;
  }
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: rgba(18, 26, 36, 0.65);
  color: var(--accent-gold-light);
  cursor: pointer;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0;
}

.cover-header .brand-link,
.cover-header .header-actions {
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1), transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-right-group {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  position: relative;
  min-height: 42px;
  margin-left: auto;
}

/* Castle Shortcut link at top-right of cover */
.castle-shortcut {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #ffffff;
  padding: 0.35rem 0.5rem 0.35rem 0.85rem;
  border-radius: 9999px;
  background: rgba(18, 26, 36, 0.55);
  border: 1px solid rgba(212, 163, 89, 0.4);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              background var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              visibility 0.35s;
  cursor: pointer;
  z-index: 10;
}

/* Two lines: English / Catalan */
.castle-shortcut-text {
  display: flex;
  flex-direction: column;
  text-align: right;
  line-height: 1.22;
  white-space: nowrap;
}

.castle-line-en {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.015em;
  color: #ffffff;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.75);
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.castle-line-ca {
  font-family: var(--font-reading);
  font-size: 0.72rem;
  font-style: italic;
  color: var(--accent-gold-light);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.75);
  white-space: nowrap;
  transition: color var(--transition-fast);
}

/* Action container: arrow + castle icon */
.castle-shortcut-action {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

/* Arrow pointing to the right */
.castle-shortcut-arrow {
  width: 16px;
  height: 16px;
  color: var(--accent-gold);
  flex-shrink: 0;
  transition: transform 0.25s ease, color var(--transition-fast);
}

/* Castle silhouette icon badge */
.castle-shortcut-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(212, 163, 89, 0.2);
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold-light);
  flex-shrink: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              background var(--transition-fast),
              box-shadow var(--transition-fast),
              color var(--transition-fast);
}

.castle-silhouette-svg {
  width: 22px;
  height: 22px;
  display: block;
}

/* Hover effects */
.castle-shortcut:hover {
  background: rgba(18, 26, 36, 0.85);
  border-color: var(--accent-gold-light);
  box-shadow: 0 4px 22px rgba(212, 163, 89, 0.4);
}

.castle-shortcut:hover .castle-line-en {
  color: var(--accent-gold-light);
}

.castle-shortcut:hover .castle-shortcut-arrow {
  transform: translateX(3px);
  color: #ffffff;
}

.castle-shortcut:hover .castle-shortcut-icon {
  transform: scale(1.1);
  background: rgba(212, 163, 89, 0.35);
  box-shadow: 0 0 14px rgba(212, 163, 89, 0.6);
  color: #ffffff;
}

/* Light mode adjustments */
[data-theme="light"] .castle-shortcut {
  background: rgba(255, 255, 255, 0.75);
  border-color: rgba(162, 115, 50, 0.45);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .castle-shortcut .castle-line-en {
  color: #1a1612;
  text-shadow: none;
}

[data-theme="light"] .castle-shortcut .castle-line-ca {
  color: var(--accent-gold-dark);
  text-shadow: none;
}

[data-theme="light"] .castle-shortcut-icon {
  background: rgba(162, 115, 50, 0.15);
  border-color: var(--accent-gold);
  color: var(--accent-gold-dark);
}

[data-theme="light"] .castle-shortcut:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: var(--accent-gold);
}

[data-theme="light"] .castle-shortcut:hover .castle-shortcut-icon {
  background: rgba(162, 115, 50, 0.25);
  color: #1a1612;
}

/* On the home cover: hide top left brand button and theme toggle switch until navigation bar appears */
.page-cover .cover-header:not(.is-scrolled) .brand-link {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  position: absolute;
  left: 1.5rem;
}

.page-cover .cover-header:not(.is-scrolled) .header-actions {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  position: absolute;
  right: 0;
}

.page-cover .cover-header:not(.is-scrolled) .castle-shortcut {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* When user scrolls down / navigation bar appears: hide castle shortcut and reveal header actions */
.page-cover .cover-header.is-scrolled .brand-link {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  position: relative;
}

.page-cover .cover-header.is-scrolled .castle-shortcut {
  opacity: 0 !important;
  pointer-events: none !important;
  transform: translateY(-8px) !important;
  visibility: hidden !important;
  position: absolute;
  right: 0;
}

.page-cover .cover-header.is-scrolled .header-actions {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  position: static;
}

[data-theme="light"] .theme-toggle-btn {
  background: rgba(240, 234, 224, 0.85);
  color: var(--accent-gold);
  border-color: var(--border-gold);
}

.theme-toggle-btn:hover {
  transform: scale(1.08) rotate(12deg);
  border-color: var(--accent-gold);
  box-shadow: 0 0 16px var(--accent-gold-glow);
}

.theme-icon {
  width: 20px;
  height: 20px;
}

.sun-icon {
  display: block;
}

.moon-icon {
  display: none;
}

[data-theme="light"] .sun-icon {
  display: none;
}

[data-theme="light"] .moon-icon {
  display: block;
}

/* --------------------------------------------------------------------------
   External Links Dropdown Menu
   -------------------------------------------------------------------------- */
.menu-dropdown-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.menu-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: rgba(18, 26, 36, 0.65);
  color: var(--accent-gold-light);
  cursor: pointer;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0;
}

[data-theme="light"] .menu-toggle-btn {
  background: rgba(240, 234, 224, 0.85);
  color: var(--accent-gold);
  border-color: var(--border-gold);
}

.menu-toggle-btn:hover {
  transform: scale(1.08);
  border-color: var(--accent-gold);
  box-shadow: 0 0 16px var(--accent-gold-glow);
}

.menu-toggle-btn .menu-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle-btn .close-icon {
  display: none;
}

.menu-toggle-btn .hamburger-icon {
  display: block;
}

.menu-toggle-btn[aria-expanded="true"] {
  background: rgba(212, 163, 89, 0.25);
  border-color: var(--accent-gold);
  color: #ffffff;
}

.menu-toggle-btn[aria-expanded="true"] .hamburger-icon {
  display: none;
}

.menu-toggle-btn[aria-expanded="true"] .close-icon {
  display: block;
}

/* Dropdown Panel */
.menu-dropdown {
  position: absolute;
  top: calc(100% + 0.65rem);
  right: 0;
  width: min(270px, calc(100vw - 2rem));
  background: rgba(15, 22, 32, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(212, 163, 89, 0.35);
  border-radius: var(--radius-md, 12px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(212, 163, 89, 0.15);
  padding: 0.5rem;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.97);
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.25s;
  pointer-events: none;
}

[data-theme="light"] .menu-dropdown {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(162, 115, 50, 0.3);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(162, 115, 50, 0.1);
}

.menu-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.menu-item-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-sm, 8px);
  text-decoration: none;
  color: var(--text-primary);
  background: transparent;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.menu-item-link:hover,
.menu-item-link:focus-visible {
  background: rgba(212, 163, 89, 0.15);
  color: var(--accent-gold-light);
  outline: none;
}

[data-theme="light"] .menu-item-link:hover,
[data-theme="light"] .menu-item-link:focus-visible {
  background: rgba(162, 115, 50, 0.1);
  color: var(--accent-gold-dark);
}

.menu-item-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.menu-item-link:hover .menu-item-icon {
  transform: scale(1.12);
}

.menu-item-icon.youtube-icon {
  background: rgba(255, 0, 0, 0.15);
  color: #ff3b30;
}

.menu-item-icon.instagram-icon {
  background: linear-gradient(135deg, rgba(245, 133, 41, 0.18), rgba(221, 42, 123, 0.18), rgba(129, 52, 175, 0.18));
  color: #e1306c;
}

.menu-item-icon.castle-icon {
  background: rgba(212, 163, 89, 0.2);
  color: var(--accent-gold);
}

.menu-item-text {
  display: flex;
  flex-direction: column;
  flex: 1;
  line-height: 1.25;
}

.menu-item-title {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.01em;
  color: var(--text-primary);
}

.menu-item-sub {
  font-family: var(--font-reading);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.menu-item-arrow {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
  opacity: 0.5;
  transition: opacity var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.menu-item-link:hover .menu-item-arrow {
  opacity: 1;
  color: var(--accent-gold);
  transform: translate(2px, -2px);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn,
a.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.6rem;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none !important;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: 1px solid transparent;
  white-space: nowrap;
  line-height: 1;
}


.btn-primary,
a.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #c48a30 100%);
  color: #120e06 !important;
  box-shadow: 0 4px 16px var(--accent-gold-glow), 0 2px 4px rgba(0, 0, 0, 0.3);
  font-weight: 700;
}

.btn-primary:hover,
a.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-gold-light) 0%, var(--accent-gold) 100%);
  color: #000000 !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(229, 169, 71, 0.4), 0 4px 8px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .btn-primary,
[data-theme="light"] a.btn-primary {
  background: linear-gradient(135deg, #c48a30 0%, var(--accent-gold) 100%);
  color: #120e06 !important;
  box-shadow: 0 4px 14px rgba(179, 115, 24, 0.28), 0 2px 4px rgba(35, 27, 20, 0.15);
}

[data-theme="light"] .btn-primary:hover,
[data-theme="light"] a.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #a86c16 100%);
  color: #000000 !important;
  box-shadow: 0 6px 20px rgba(179, 115, 24, 0.38), 0 2px 6px rgba(35, 27, 20, 0.2);
}

.btn-secondary,
a.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
}

[data-theme="light"] .btn-secondary,
[data-theme="light"] a.btn-secondary {
  background: rgba(35, 27, 20, 0.06);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover,
a.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-gold);
  color: var(--accent-gold-light);
  transform: translateY(-2px);
}

[data-theme="light"] .btn-secondary:hover,
[data-theme="light"] a.btn-secondary:hover {
  background: rgba(35, 27, 20, 0.1);
  border-color: var(--border-gold);
  color: var(--accent-gold);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}


.btn-disabled,
.btn:disabled,
span.btn-disabled {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  border: 1px dashed var(--border-subtle);
  cursor: not-allowed;
  opacity: 0.65;
  pointer-events: none;
  user-select: none;
  box-shadow: none !important;
  transform: none !important;
  font-style: italic;
  letter-spacing: 0.03em;
}

[data-theme="light"] .btn-disabled,
[data-theme="light"] .btn:disabled,
[data-theme="light"] span.btn-disabled {
  background: rgba(35, 27, 20, 0.03);
  color: var(--text-muted);
  border: 1px dashed var(--border-subtle);
  opacity: 0.65;
}

/* --------------------------------------------------------------------------
   Book Experience & Parallax Fixed Cover Section
   -------------------------------------------------------------------------- */
.book-experience {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-main);
}

/* Fixed Background Cover Image (Fades out smoothly on scroll) */
.cover-bg-fixed {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
  will-change: opacity, transform;
}

.cover-bg-fixed picture,
.cover-bg-fixed .hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  transform: scale(1.02);
}

/* Cover Hero Section (Home page: full viewport height) */
.cover-hero-section {
  position: relative;
  z-index: 5;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  text-align: center;
  padding: 6.5rem 1.5rem 3.5rem;
  box-sizing: border-box;
}

/* Chapter Hero Section (Chapter pages: ~3/4 screen height, revealing text below) */
.chapter-hero-section {
  min-height: 75vh;
  min-height: 75dvh;
  justify-content: center;
  padding: 5rem 1.5rem 2rem;
}

.chapter-bg-fixed {
  height: 75vh;
  height: 75dvh;
}

.chapter-content-stack {
  margin-top: auto;
  margin-bottom: auto;
}

/* Elements over cover image (continuous solid outline + soft depth shadow) */
.is-over-image,
h1.is-over-image,
p.is-over-image {
  text-shadow:
    -1.5px -1.5px 0 #000000,
     0px   -1.5px 0 #000000,
     1.5px -1.5px 0 #000000,
    -1.5px  0px   0 #000000,
     1.5px  0px   0 #000000,
    -1.5px  1.5px 0 #000000,
     0px    1.5px 0 #000000,
     1.5px  1.5px 0 #000000,
     0px    2px   6px rgba(0, 0, 0, 0.9),
     0px    0px  12px rgba(0, 0, 0, 0.7);
}

/* Stacked content: Logo, Title, Tagline (Scrolls up faster than text while fading) */
.cover-content-stack {
  position: relative;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 860px;
  width: 100%;
  gap: 1.15rem;
  margin-top: auto;
  margin-bottom: 2.5rem;
  will-change: transform, opacity;
}

.cover-logo-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 0.1rem;
}

.cover-hero-logo {
  width: 90px;
  height: auto;
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.8));
  transition: transform var(--transition-smooth);
}

.cover-hero-logo:hover {
  transform: scale(1.08) rotate(-2deg);
}

.cover-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6.5vw, 4.2rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.12;
  color: #ffffff;
}

.chapter-hero-number {
  font-family: var(--font-ui);
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #f5c86e;
  display: inline-block;
  margin-bottom: -0.15rem;
}

.chapter-hero-title {
  font-family: var(--font-script);
  font-size: clamp(2.8rem, 7vw, 4.8rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.18;
  color: #f7edd8;
  text-align: center;
  max-width: 900px;
}

.cover-hero-tagline {
  font-family: var(--font-reading);
  font-size: clamp(1.1rem, 2.5vw, 1.45rem);
  font-style: italic;
  color: #f7edd8;
  max-width: 680px;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

/* Call to Action Button Container: Fades out quickly on scroll */
.cover-hero-action {
  position: relative;
  z-index: 6;
  margin-bottom: 2rem;
  will-change: transform, opacity;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.btn-journey,
a.btn-journey {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.95rem 2.4rem;
  font-family: var(--font-ui);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none !important;
  color: var(--accent-gold-light);
  background: rgba(18, 26, 36, 0.82);
  border: 1.5px solid var(--border-gold);
  border-radius: 50px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow:
    0 8px 30px rgba(0, 0, 0, 0.6),
    0 0 25px var(--accent-gold-glow);
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

[data-theme="light"] .btn-journey {
  color: #ffffff;
  background: rgba(35, 27, 20, 0.85);
  border-color: var(--accent-gold);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.btn-journey:hover,
a.btn-journey:hover {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #c48a30 100%);
  color: #0c0a04;
  border-color: var(--accent-gold-light);
  transform: translateY(-3px);
  box-shadow:
    0 14px 35px rgba(229, 169, 71, 0.45),
    0 4px 14px rgba(0, 0, 0, 0.7);
  text-shadow: none;
}

.journey-chevron {
  width: 20px;
  height: 20px;
  animation: journeyBounce 2.2s ease-in-out infinite;
}

@keyframes journeyBounce {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(5px);
  }
}

/* --------------------------------------------------------------------------
   The Reading Canvas (Scrolls up naturally over the fading fixed cover)
   -------------------------------------------------------------------------- */
.book-page-canvas {
  position: relative;
  z-index: 10;
  width: 100%;
  padding: 6.5rem 1.5rem 5rem;
  background-color: var(--bg-main);
  box-shadow: 0 -25px 50px rgba(0, 0, 0, 0.45);
  transition: background-color var(--transition-smooth);
}

[data-theme="light"] .book-page-canvas {
  box-shadow: 0 -20px 45px rgba(35, 27, 20, 0.15);
}


.book-page-inner {
  max-width: var(--container-reading);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

/* Prose Book Typography (Clean page reading, justified text) */
.prose {
  font-family: var(--font-reading);
  font-size: 1.2rem;
  line-height: 1.85;
  color: var(--text-primary);
  text-align: justify;
  text-justify: inter-word;
  hyphens: auto;
  -webkit-hyphens: auto;
  transition: color var(--transition-smooth);
}

.prose p {
  margin-bottom: 1.8rem;
}

.prose p:last-child {
  margin-bottom: 0;
}

/* Elegant Drop Cap for the first letter of the prologue */
.prose p:first-of-type::first-letter {
  font-family: var(--font-display);
  float: left;
  font-size: 3.8rem;
  line-height: 0.8;
  padding-top: 0.1em;
  padding-right: 0.25em;
  padding-bottom: 0.05em;
  color: var(--accent-gold-light);
  font-weight: 700;
  text-shadow: 0 2px 10px rgba(229, 169, 71, 0.3);
}

[data-theme="light"] .prose p:first-of-type::first-letter {
  color: var(--accent-gold);
  text-shadow: none;
}

/* --------------------------------------------------------------------------
   Featured Chapter Card (Translucid Glass over Cover Image)
   -------------------------------------------------------------------------- */
.chapter-cta-card {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border-gold);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  padding: 2.5rem 2.8rem;
  box-shadow:
    0 16px 40px rgba(0, 0, 0, 0.45),
    0 0 25px rgba(229, 169, 71, 0.12),
    inset 0 1px 1px rgba(255, 255, 255, 0.15);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.chapter-cta-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-gold-strong);
  box-shadow:
    0 22px 50px rgba(0, 0, 0, 0.55),
    0 0 35px rgba(229, 169, 71, 0.22),
    inset 0 1px 1px rgba(255, 255, 255, 0.25);
}

[data-theme="light"] .chapter-cta-card {
  border-color: var(--border-gold);
  box-shadow:
    0 14px 35px rgba(35, 27, 20, 0.15),
    0 0 20px rgba(179, 115, 24, 0.1),
    inset 0 1px 1px rgba(255, 255, 255, 0.6);
}

[data-theme="light"] .chapter-cta-card:hover {
  box-shadow:
    0 20px 45px rgba(35, 27, 20, 0.22),
    0 0 30px rgba(179, 115, 24, 0.18),
    inset 0 1px 1px rgba(255, 255, 255, 0.8);
}

/* Background image wrapper */
.chapter-cta-bg-wrap {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
}

.chapter-cta-bg-wrap picture,
.chapter-cta-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  transform: scale(1.02);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.chapter-cta-card:hover .chapter-cta-bg-img {
  transform: scale(1.06);
}

/* Translucid frosted glass overlay */
.chapter-cta-glass-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    135deg,
    rgba(10, 14, 20, 0.46) 0%,
    rgba(16, 24, 34, 0.56) 50%,
    rgba(10, 14, 20, 0.62) 100%
  );
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  transition: background var(--transition-smooth);
}

[data-theme="light"] .chapter-cta-glass-overlay {
  background: linear-gradient(
    135deg,
    rgba(249, 246, 239, 0.52) 0%,
    rgba(240, 234, 224, 0.60) 50%,
    rgba(249, 246, 239, 0.68) 100%
  );
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Content layer over glass */
.chapter-cta-content {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.chapter-cta-number {
  font-family: var(--font-ui);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-gold-light);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
  display: inline-block;
  margin-bottom: -0.25rem;
}

[data-theme="light"] .chapter-cta-number {
  color: var(--accent-gold);
  text-shadow: none;
}

.chapter-cta-title {
  font-family: var(--font-script);
  font-size: clamp(2.4rem, 5.5vw, 3.2rem);
  font-weight: 400;
  line-height: 1.25;
  color: var(--accent-gold-light);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
  letter-spacing: 0.01em;
  margin: 0;
}

[data-theme="light"] .chapter-cta-title {
  color: var(--accent-gold);
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.6);
}

.chapter-cta-desc {
  color: var(--text-primary);
  font-family: var(--font-reading);
  font-size: 1.05rem;
  line-height: 1.7;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
  margin: 0;
}

[data-theme="light"] .chapter-cta-desc {
  color: var(--text-primary);
  text-shadow: none;
}

.chapter-cta-footer {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border-subtle);
}

.chapter-cta-meta {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .cover-hero-section {
    padding: 5.5rem 1.25rem 2.5rem;
  }

  .chapter-hero-section {
    min-height: 70vh;
    min-height: 70dvh;
    padding: 4.5rem 1.25rem 1.5rem;
  }

  .chapter-bg-fixed {
    height: 70vh;
    height: 70dvh;
  }

  .cover-content-stack {
    margin-bottom: 2rem;
  }

  .chapter-content-stack {
    margin-bottom: auto;
  }

  .cover-hero-action {
    margin-bottom: 1.5rem;
  }

  .book-page-canvas {
    padding: 5rem 1.25rem 4rem;
  }

  .chapter-cta-card {
    padding: 1.75rem 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cover-content-stack {
    transform: none !important;
  }

  .cover-hero-action {
    transform: none !important;
  }
}

/* --------------------------------------------------------------------------
   Chapter Layout Styles (for chapter.njk)
   -------------------------------------------------------------------------- */
.chapter-container {
  max-width: var(--container-reading);
  margin: 0 auto;
  padding: 0 0 5rem;
}

.chapter-header {
  margin-bottom: 3.5rem;
  text-align: left;
}

.chapter-meta-line {
  font-family: var(--font-reading);
  font-size: 1.18rem;
  line-height: 1.85;
  color: var(--text-primary);
  margin: 0;
  text-align: left;
}

.chapter-meta-line em {
  display: inline-block;
  font-style: italic !important;
  transform: skewX(-7deg);
  transform-origin: left bottom;
  letter-spacing: 0.02em;
}

.chapter-meta-divider {
  width: 76px;
  height: 1.5px;
  background: var(--text-primary);
  margin: 1.25rem 0 0;
  border-radius: 2px;
  opacity: 0.7;
}

.chapter-prose {
  font-size: 1.18rem;
}

.chapter-prose p {
  margin-bottom: 1.6rem;
}

.chapter-prose img {
  border-radius: var(--radius-md);
  margin: 2.5rem auto;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-subtle);
}

.chapter-nav {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  width: 32px;
  height: 32px;
  opacity: 0.7;
  filter: grayscale(40%);
  transition: opacity var(--transition-fast), filter var(--transition-fast);
}

.footer-logo:hover {
  opacity: 1;
  filter: grayscale(0%);
}

.footer-text,
.footer-castle-note {
  max-width: 620px;
  line-height: 1.5;
  text-wrap: balance;
}

.footer-castle-note {
  font-style: italic;
  color: var(--accent-gold);
}

/* --------------------------------------------------------------------------
   Responsive Adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .site-header {
    padding: 0.6rem 1rem;
  }

  .cover-hero-logo {
    width: 72px;
  }

  .btn-journey {
    padding: 0.85rem 1.8rem;
    font-size: 0.98rem;
  }

  .prose,
  .chapter-prose,
  .chapter-meta-line {
    font-size: 1.08rem;
    line-height: 1.75;
  }

  .chapter-cta-card {
    padding: 1.5rem 1.25rem;
  }

  .page-cover .cover-header:not(.is-scrolled) .brand-link {
    position: absolute;
    left: 1rem;
  }

  .page-cover .cover-header:not(.is-scrolled) .header-right-group {
    width: 100%;
  }

  .page-cover .cover-header:not(.is-scrolled) .castle-shortcut {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.45rem 0.65rem 0.45rem 1rem;
    box-sizing: border-box;
  }

  .page-cover .cover-header:not(.is-scrolled) .castle-shortcut-text {
    text-align: left;
  }

  .castle-line-en {
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .castle-line-ca {
    font-size: 0.7rem;
    white-space: nowrap;
  }

  .castle-shortcut-action {
    gap: 0.5rem;
  }

  .castle-shortcut-arrow {
    width: 15px;
    height: 15px;
  }

  .castle-shortcut-icon {
    width: 34px;
    height: 34px;
  }

  .castle-silhouette-svg {
    width: 20px;
    height: 20px;
  }
}