/* ================================================================
   DECOHERENT SOLUTIONS — style.css
   Desktop-first stylesheet.
   All visual values driven by CSS custom properties.
   Mobile overrides live in mobile.css.
   ================================================================ */

@import url('/assets/css/fonts.css');


/* ----------------------------------------------------------------
   SECTION A — CSS CUSTOM PROPERTIES
   Classic theme is the default (:root).
   Every value that any theme may change is a variable.
   Nav bar colors are updated for light/dark but fixed for
   project themes — it is structural chrome, not thematic canvas.
   ---------------------------------------------------------------- */

:root {
  /* Typography */
  --font-body:    'Times New Roman', Times, serif;
  --font-heading: Arial, Helvetica, sans-serif;

  /* Structural backgrounds */
  --bg-body:      #c0c0c0;
  --bg-container: #ffffff;
  --bg-sidebar:   #f0f0f0;
  --bg-content:   #ffffff;
  --bg-footer:    #d4d0c8;

  /* Nav bar */
  --bg-nav:     #d4d0c8;
  --text-nav:   #000000;
  --border-nav: #808080;

  /* Text */
  --text-primary:      #000000;
  --text-secondary:    #444444;
  --text-heading:      #000000;
  --text-link:         #0000ee;
  --text-link-visited: #551a8b;
  --text-link-active:  #ff0000;

  /* Borders and shadow */
  --border:        #808080;
  --border-strong: #000000;
  --shadow:        rgba(0, 0, 0, 0.4);

  /* Sidebar states */
  --sidebar-active-bg:   #000080;
  --sidebar-active-text: #ffffff;
  --sidebar-hover-bg:    #dcdcdc;

  /* Nav bar active state — separate from sidebar active so themes
     where the nav bar is already the accent color can invert. */
  --nav-active-bg:   #000080;
  --nav-active-text: #ffffff;

  /* Accents */
  --accent-primary:   #000080;
  --accent-secondary: #800000;

  /* Banner */
  --banner-image:  none;
  --banner-bg:     #000080;
  --banner-height: 120px;

  /* Options panel */
  --bg-options:     #f0f0f0;
  --border-options: #808080;

  /* Scrollbars — track matches --border for visual consistency;
     thumb contrasts against track; border echoes --border */
  --scrollbar-width:  8px;
  --scrollbar-thumb:  #505050;
  --scrollbar-track:  #808080;
  --scrollbar-border: #808080;

  /* Layout */
  --container-width: 1000px;
  --sidebar-width:   200px;
}


/* ----------------------------------------------------------------
   THEME: dark
   ---------------------------------------------------------------- */

[data-theme="dark"] {
  --bg-body:      #0a0a0a;
  --bg-container: #1a1a1a;
  --bg-sidebar:   #222222;
  --bg-content:   #1a1a1a;
  --bg-footer:    #111111;

  --bg-nav:     #2a2a2a;
  --text-nav:   #e0e0e0;
  --border-nav: #444444;

  --text-primary:      #e0e0e0;
  --text-secondary:    #9e9e9e;
  --text-heading:      #ffffff;
  --text-link:         #88aaff;
  --text-link-visited: #cc99ff;
  --text-link-active:  #ff6666;

  --border:        #444444;
  --border-strong: #888888;
  --shadow:        rgba(0, 0, 0, 0.8);

  --sidebar-active-bg:   #4455aa;
  --sidebar-active-text: #ffffff;
  --sidebar-hover-bg:    #333333;

  --nav-active-bg:   #5a78cc;
  --nav-active-text: #ffffff;

  --accent-primary:   #4455aa;
  --accent-secondary: #aa5544;

  --banner-bg: #0a0a2a;

  --bg-options:     #2a2a2a;
  --border-options: #555555;

  --scrollbar-thumb:  #666666;
  --scrollbar-track:  #444444;
  --scrollbar-border: #444444;

  --font-body:    'Source Serif 4', Georgia, serif;
  --font-heading: 'DM Sans', Helvetica, sans-serif;
}


/* ----------------------------------------------------------------
   THEME: light
   ---------------------------------------------------------------- */

[data-theme="light"] {
  --bg-body:      #e8e8e8;
  --bg-container: #ffffff;
  --bg-sidebar:   #f5f5f5;
  --bg-content:   #ffffff;
  --bg-footer:    #eeeeee;

  --bg-nav:     #f0f0f0;
  --text-nav:   #222222;
  --border-nav: #cccccc;

  --text-primary:      #1a1a1a;
  --text-secondary:    #555555;
  --text-heading:      #000000;
  --text-link:         #0055cc;
  --text-link-visited: #660099;
  --text-link-active:  #cc0000;

  --border:        #cccccc;
  --border-strong: #888888;
  --shadow:        rgba(0, 0, 0, 0.15);

  --sidebar-active-bg:   #0055cc;
  --sidebar-active-text: #ffffff;
  --sidebar-hover-bg:    #e8e8e8;

  --nav-active-bg:   #0055cc;
  --nav-active-text: #ffffff;

  --accent-primary:   #0055cc;
  --accent-secondary: #cc5500;

  --banner-bg: #0055cc;

  --bg-options:     #f5f5f5;
  --border-options: #cccccc;

  --scrollbar-thumb:  #888888;
  --scrollbar-track:  #cccccc;
  --scrollbar-border: #cccccc;

  --font-body:    'Source Serif 4', Georgia, serif;
  --font-heading: 'DM Sans', Helvetica, sans-serif;
}


/* ----------------------------------------------------------------
   THEME: sepia
   ---------------------------------------------------------------- */

[data-theme="sepia"] {
  --bg-body:      #c8b89a;
  --bg-container: #f4efe6;
  --bg-sidebar:   #ede4d3;
  --bg-content:   #f4efe6;
  --bg-footer:    #e0d5c4;

  --bg-nav:     #d8c9a8;
  --text-nav:   #3a2a1a;
  --border-nav: #a08060;

  --text-primary:      #3a2a1a;
  --text-secondary:    #6a5a4a;
  --text-heading:      #2a1a0a;
  --text-link:         #7a3a00;
  --text-link-visited: #5a2a4a;
  --text-link-active:  #cc4400;

  --border:        #a08060;
  --border-strong: #5a3a1a;
  --shadow:        rgba(60, 30, 0, 0.3);

  --sidebar-active-bg:   #7a3a00;
  --sidebar-active-text: #f4efe6;
  --sidebar-hover-bg:    #e0d0b8;

  --nav-active-bg:   #7a3a00;
  --nav-active-text: #f4efe6;

  --accent-primary:   #7a3a00;
  --accent-secondary: #4a6a2a;

  --banner-bg: #7a3a00;

  --bg-options:     #ede4d3;
  --border-options: #a08060;

  --scrollbar-thumb:  #6a5040;
  --scrollbar-track:  #a08060;
  --scrollbar-border: #a08060;

  --font-body:    'Source Serif 4', Georgia, serif;
  --font-heading: 'DM Sans', Helvetica, sans-serif;
}


/* ----------------------------------------------------------------
   PROJECT THEMES
   Each theme reflects the aesthetic world of its section.
   Banner images TBD pending Scuppy illustrations.
   ---------------------------------------------------------------- */

/* ---- MAZEMILK ----
   Nervous rabbit pop. Warm, lo-fi, amber and cream.
   Lora body for warmth; Josefin Sans headings for retro indie feel. */

[data-theme="mazemilk"] {
  --bg-body:      #b8a898;
  --bg-container: #fdf6ee;
  --bg-sidebar:   #f2e8d8;
  --bg-content:   #fdf6ee;
  --bg-footer:    #e8d8c0;

  --bg-nav:     #d4c0c8;
  --text-nav:   #2a1a20;
  --border-nav: #a08888;

  --text-primary:      #2a1a0a;
  --text-secondary:    #6a4a30;
  --text-heading:      #1a0a00;
  --text-link:         #8a4a00;
  --text-link-visited: #5a2a40;
  --text-link-active:  #cc5500;

  --border:        #c8a888;
  --border-strong: #6a3a1a;
  --shadow:        rgba(80, 40, 0, 0.3);

  --sidebar-active-bg:   #8a4a00;
  --sidebar-active-text: #fdf6ee;
  --sidebar-hover-bg:    #eedcc8;

  --nav-active-bg:   #8a4a00;
  --nav-active-text: #fdf6ee;

  --accent-primary:   #8a4a00;
  --accent-secondary: #4a6a2a;

  --banner-bg: #3a2a1a;

  --bg-options:     #f2e8d8;
  --border-options: #c8a888;

  --scrollbar-thumb:  #8a6a4a;
  --scrollbar-track:  #c8a888;
  --scrollbar-border: #c8a888;

  --font-body:    'Lora', Georgia, serif;
  --font-heading: 'Josefin Sans', Arial, sans-serif;
}


/* ---- VERITY ----
   Deep space found family. Near-black, starlight whites, cool blue.
   Source Serif 4 body; Space Grotesk headings for ship-terminal feel. */

[data-theme="verity"] {
  --bg-body:      #060610;
  --bg-container: #0e0e1e;
  --bg-sidebar:   #131328;
  --bg-content:   #0e0e1e;
  --bg-footer:    #080818;

  --bg-nav:     #1a1a2e;
  --text-nav:   #c8d8e8;
  --border-nav: #2a3a5a;

  --text-primary:      #d0dce8;
  --text-secondary:    #7a8aa0;
  --text-heading:      #e8f0f8;
  --text-link:         #6899cc;
  --text-link-visited: #9966cc;
  --text-link-active:  #cc6666;

  --border:        #2a3a5a;
  --border-strong: #5a7aaa;
  --shadow:        rgba(0, 0, 20, 0.9);

  --sidebar-active-bg:   #2a4a8a;
  --sidebar-active-text: #e8f0f8;
  --sidebar-hover-bg:    #1a2a44;

  --nav-active-bg:   #5a88cc;
  --nav-active-text: #ffffff;

  --accent-primary:   #4a78cc;
  --accent-secondary: #cc9944;

  --banner-bg: #0a0a2a;

  --bg-options:     #131328;
  --border-options: #2a3a5a;

  --scrollbar-thumb:  #2a4a8a;
  --scrollbar-track:  #2a3a5a;
  --scrollbar-border: #2a3a5a;

  --font-body:    'Source Serif 4', Georgia, serif;
  --font-heading: 'Oxanium', Arial, sans-serif;
}


/* ---- PETTY'S PIZZERIA ----
   1997 strip mall diner. Faded red, cream, earthy warmth.
   Libre Baskerville body for workhorse print feel;
   Oswald headings for condensed counter-signage energy. */

[data-theme="pettys"] {
  --bg-body:      #b8a898;
  --bg-container: #fdf5e4;
  --bg-sidebar:   #f4e8d0;
  --bg-content:   #fdf5e4;
  --bg-footer:    #e8d8bc;

  --bg-nav:     #8b1a1a;
  --text-nav:   #fdf5e4;
  --border-nav: #6a1010;

  --text-primary:      #1a0a00;
  --text-secondary:    #5a3a20;
  --text-heading:      #1a0a00;
  --text-link:         #8b1a1a;
  --text-link-visited: #4a1a3a;
  --text-link-active:  #cc2200;

  --border:        #c8aa88;
  --border-strong: #6a3a1a;
  --shadow:        rgba(60, 20, 0, 0.3);

  --sidebar-active-bg:   #8b1a1a;
  --sidebar-active-text: #fdf5e4;
  --sidebar-hover-bg:    #ecd8b8;

  --nav-active-bg:   #fdf5e4;
  --nav-active-text: #8b1a1a;

  --accent-primary:   #8b1a1a;
  --accent-secondary: #2a5a2a;

  --banner-bg: #8b0000;

  --bg-options:     #f4e8d0;
  --border-options: #c8aa88;

  --scrollbar-thumb:  #8b4a2a;
  --scrollbar-track:  #c8aa88;
  --scrollbar-border: #c8aa88;

  --font-body:    'Libre Baskerville', Georgia, serif;
  --font-heading: 'Oswald', Arial, sans-serif;
}


/* ---- LOPSCOTCH ----
   Floating Havens in a bright blue sky, the spectral Blur below.
   Surreal and whimsical on the surface, with hints of horror.
   Sims-y + adventure game energy — airy, colorful, playful.
   Six player colors defined as custom properties for per-character use.
   EB Garamond body for classical-surreal contrast;
   Oxanium headings for game-overlay feel. */

[data-theme="lopscotch"] {
  --bg-body:      #9ab4c8;
  --bg-container: #eef4f8;
  --bg-sidebar:   #dde9f4;
  --bg-content:   #eef4f8;
  --bg-footer:    #cce0f0;

  --bg-nav:     #4a7aaa;
  --text-nav:   #ffffff;
  --border-nav: #3a6090;

  --text-primary:      #1a2a3a;
  --text-secondary:    #4a6080;
  --text-heading:      #0a1a2a;
  --text-link:         #2244aa;
  --text-link-visited: #6a2a8a;
  --text-link-active:  #9b2335;

  --border:        #aac8e0;
  --border-strong: #4a7aaa;
  --shadow:        rgba(20, 60, 100, 0.2);

  --sidebar-active-bg:   #2244aa;
  --sidebar-active-text: #ffffff;
  --sidebar-hover-bg:    #cce0f4;

  --nav-active-bg:   #eef4f8;
  --nav-active-text: #2244aa;

  --accent-primary:   #2244aa;
  --accent-secondary: #9b2335;

  --banner-bg: #3a6090;

  --bg-options:     #dde9f4;
  --border-options: #aac8e0;

  --scrollbar-thumb:  #4a7aaa;
  --scrollbar-track:  #aac8e0;
  --scrollbar-border: #aac8e0;

  /* Six player colors — available for per-character page accents */
  --player-felix:  #9b2335; /* ruby red    */
  --player-edwin:  #c8a800; /* citrine yellow */
  --player-doris:  #2a7a4a; /* emerald green  */
  --player-casey:  #2244aa; /* sapphire blue  */
  --player-blake:  #6a2a8a; /* amethyst purple */
  --player-alana:  #5a5a6a; /* hematite grey  */

  --font-body:    'EB Garamond', Georgia, serif;
  --font-heading: 'Space Grotesk', Arial, sans-serif;
}


/* ---- CAPTIOTIA ----
   Island socialist society. Encyclopedic, authoritative, warm.
   Merriweather body for screen-legible authority;
   Work Sans headings for clean institutional clarity.
   Colors TBD pending flag palette — using placeholder warm reds
   and creams as a starting point for refinement. */

[data-theme="captiotia"] {
  --bg-body:      #a8b8b0;
  --bg-container: #f4f8f4;
  --bg-sidebar:   #e8f0e8;
  --bg-content:   #f4f8f4;
  --bg-footer:    #d8e4d8;

  --bg-nav:     #c0403a;
  --text-nav:   #f4f8f4;
  --border-nav: #9a2a24;

  --text-primary:      #0a1a0a;
  --text-secondary:    #3a5a3a;
  --text-heading:      #0a1a0a;
  --text-link:         #c0403a;
  --text-link-visited: #4a2a6a;
  --text-link-active:  #aa2020;

  --border:        #9ab8a0;
  --border-strong: #3a6a3a;
  --shadow:        rgba(0, 30, 0, 0.25);

  --sidebar-active-bg:   #c0403a;
  --sidebar-active-text: #f4f8f4;
  --sidebar-hover-bg:    #d8ead8;

  --nav-active-bg:   #f4f8f4;
  --nav-active-text: #0a1a0a;
  --accent-secondary: #3a7a3a;

  --banner-bg: #0a2a0a;

  --bg-options:     #e8f0e8;
  --border-options: #9ab8a0;

  --scrollbar-thumb:  #6a8a6a;
  --scrollbar-track:  #9ab8a0;
  --scrollbar-border: #9ab8a0;

  --font-body:    'Merriweather', Georgia, serif;
  --font-heading: 'Work Sans', Arial, sans-serif;
}


/* ---- QCLOD / MAISY ----
   Personal wildcard theme. Warm lavender-cream, expressive and fun.
   The default before Classic/Light/Dark/Sepia in the options panel.
   Lora body for warmth; Space Grotesk headings for distinct personality.
   Unexpected link colors (amber active, teal visited) reflect curiosity. */

[data-theme="qclod"] {
  --bg-body:      #b4a0c0;
  --bg-container: #f8f4fc;
  --bg-sidebar:   #eee8f8;
  --bg-content:   #f8f4fc;
  --bg-footer:    #dcd4ec;

  --bg-nav:     #9070a0;
  --text-nav:   #f8f4fc;
  --border-nav: #6a4878;

  --text-primary:      #180830;
  --text-secondary:    #5a4068;
  --text-heading:      #180830;
  --text-link:         #7040a0;
  --text-link-visited: #386060;
  --text-link-active:  #cc7700;

  --border:        #c0aad0;
  --border-strong: #4a2868;
  --shadow:        rgba(30, 0, 40, 0.25);

  --sidebar-active-bg:   #7040a0;
  --sidebar-active-text: #f8f4fc;
  --sidebar-hover-bg:    #e4d8f4;

  --nav-active-bg:   #f8f4fc;
  --nav-active-text: #180830;

  --accent-primary:   #7040a0;
  --accent-secondary: #cc7700;

  --banner-image: none;
  --banner-bg:    #806090;

  --bg-options:     #eee8f8;
  --border-options: #c0aad0;

  --scrollbar-thumb:  #9070a0;
  --scrollbar-track:  #c0aad0;
  --scrollbar-border: #c0aad0;

  --font-body:    'Lora', Georgia, serif;
  --font-heading: 'Space Grotesk', Arial, sans-serif;
}


/* ----------------------------------------------------------------
   SECTION B — RESET AND BASE
   ---------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  color-scheme: light dark;

  /* Permanently reserve the page scrollbar lane to prevent layout
     shift when the scrollbar appears or disappears. */
  scrollbar-gutter: stable;

  /* Page-level scrollbar styling — uses same theme variables as sidebar.
     Firefox / Chromium 121+: */
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

/* Webkit page-level scrollbar */
html::-webkit-scrollbar {
  width: var(--scrollbar-width);
}

html::-webkit-scrollbar-track {
  background-color: var(--scrollbar-track);
}

html::-webkit-scrollbar-thumb {
  background-color: var(--scrollbar-thumb);
}

html::-webkit-scrollbar-thumb:hover {
  filter: brightness(0.85);
}

body {
  background-color: var(--bg-body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
}


/* ----------------------------------------------------------------
   SECTION C — SR-ONLY UTILITY
   ---------------------------------------------------------------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}


/* ----------------------------------------------------------------
   SECTION D — CONTAINER
   ---------------------------------------------------------------- */

#container {
  position: relative;
  display: flex;
  flex-direction: column;
  width: var(--container-width);
  margin: 0 auto;
  min-height: 100vh;
  background-color: var(--bg-container);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  box-shadow: -4px 0 16px var(--shadow), 4px 0 16px var(--shadow);
}

#page-layout {
  flex: 1;
}


/* ----------------------------------------------------------------
   SECTION E — BANNER
   ---------------------------------------------------------------- */

#banner-link {
  display: block;
  width: 100%;
  height: var(--banner-height);
  background-image: var(--banner-image);
  background-color: var(--banner-bg);
  background-size: cover;
  background-position: center;
  text-decoration: none;
}

#banner-link:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: -3px;
}


/* ----------------------------------------------------------------
   SECTION F — GLOBAL NAV BAR
   ---------------------------------------------------------------- */

#global-nav {
  position: relative; /* establishes positioning context for options panel */
  display: flex;
  align-items: stretch;
  background-color: var(--bg-nav);
  border-top: 1px solid var(--border-nav);
  border-bottom: 2px solid var(--border-nav);
}

#home-icon-link {
  display: flex;
  align-items: center;
  padding: 0 0.75rem;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--text-nav);
  text-decoration: none;
  border-right: 1px solid var(--border-nav);
  flex-shrink: 0;
}

#home-icon-link:hover {
  background-color: var(--sidebar-hover-bg);
}

#home-icon-link[aria-current="page"] {
  background-color: var(--nav-active-bg);
  color: var(--nav-active-text);
}

#nav-list {
  display: flex;
  list-style: none;
  flex: 1;
  overflow-x: auto;
}

#nav-list li {
  display: flex;
}

#nav-list a {
  display: flex;
  align-items: center;
  padding: 0.45rem 0.7rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--text-nav);
  text-decoration: none;
  white-space: nowrap;
  border-right: 1px solid var(--border-nav);
}

#nav-list a:hover {
  background-color: var(--sidebar-hover-bg);
}

#nav-list a[aria-current="page"] {
  background-color: var(--nav-active-bg);
  color: var(--nav-active-text);
  font-weight: bold;
}

#options-btn {
  display: flex;
  align-items: center;
  padding: 0 0.75rem;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--text-nav);
  background: none;
  border: none;
  border-left: 1px solid var(--border-nav);
  cursor: pointer;
  flex-shrink: 0;
}

#options-btn:hover {
  background-color: var(--sidebar-hover-bg);
}


/* ----------------------------------------------------------------
   SECTION G — PAGE LAYOUT GRID
   ---------------------------------------------------------------- */

#page-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-areas: "sidebar content";
  align-items: stretch; /* sidebar stretches full height of the row */
  flex: 1; /* fills remaining container height, pushing footer down */
}

#site-sidebar {
  grid-area: sidebar;
}

#main-content {
  grid-area: content;
}

/* Sidebar toggle hidden on desktop; shown via mobile.css */
#sidebar-toggle {
  display: none;
}

/* No-sidebar layout (home page, about, etc.) */
#page-layout.no-sidebar {
  grid-template-columns: 1fr;
  grid-template-areas: "content";
}

#page-layout.no-sidebar #site-sidebar {
  display: none;
}


/* ----------------------------------------------------------------
   SECTION H — SIDEBAR
   ---------------------------------------------------------------- */

#site-sidebar {
  position: sticky;
  top: 0;
  max-height: 100vh;
  overflow-y: scroll; /* always render the track/gutter — no sudden appearance */
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  font-size: 0.85rem;
  align-self: stretch; /* fills full page-layout row height */

  /* Standard scrollbar (Firefox, Chromium 121+) */
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  /* scrollbar-gutter: stable not needed — overflow-y: scroll always shows it */
}

/* Webkit/Blink detailed scrollbar styling */
#site-sidebar::-webkit-scrollbar {
  width: var(--scrollbar-width);
}

#site-sidebar::-webkit-scrollbar-track {
  background-color: var(--scrollbar-track);
  border-left: 1px solid var(--scrollbar-border);
}

#site-sidebar::-webkit-scrollbar-thumb {
  background-color: var(--scrollbar-thumb);
  border-left: 1px solid var(--scrollbar-border);
}

#site-sidebar::-webkit-scrollbar-thumb:hover {
  filter: brightness(0.85);
}

#sidebar-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Section root link — top of sidebar, bold heading */
.sidebar-section-root > a {
  display: block;
  padding: 0.6rem 0.75rem;
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 0.9rem;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 2px solid var(--border);
}

.sidebar-section-root > a:hover {
  background-color: var(--sidebar-hover-bg);
}

.sidebar-section-root > a.sidebar-active {
  background-color: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}

/* Depth-1 leaf links — items with no children at the top level
   (e.g. Supporting Characters, Theme Song, Contact).
   These are direct children of the sidebar-nav root <ul>
   that are neither .sidebar-section-root nor .sidebar-parent. */
#sidebar-nav > ul > li:not(.sidebar-section-root):not(.sidebar-parent) > a {
  display: block;
  padding: 0.4rem 0.5rem 0.4rem 0.75rem;
  font-weight: bold;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

#sidebar-nav > ul > li:not(.sidebar-section-root):not(.sidebar-parent) > a:hover {
  background-color: var(--sidebar-hover-bg);
}

#sidebar-nav > ul > li:not(.sidebar-section-root):not(.sidebar-parent) > a.sidebar-active {
  background-color: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}

/* Album (parent) rows — flex row containing link and toggle button */
.sidebar-parent-row {
  display: flex;
  align-items: stretch;
}

/* Album (parent) links — depth 1 */
.sidebar-parent > .sidebar-parent-row > a {
  display: block;
  flex: 1;
  padding: 0.4rem 0.5rem 0.4rem 0.75rem;
  font-weight: bold;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.sidebar-parent > .sidebar-parent-row > a:hover {
  background-color: var(--sidebar-hover-bg);
}

.sidebar-parent > .sidebar-parent-row > a.sidebar-active {
  background-color: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}

/* Expand/collapse toggle button */
.sidebar-expand-btn {
  flex-shrink: 0;
  width: 2rem;
  padding: 0;
  background: none;
  border: none;
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--text-secondary);
  text-align: center;
}

.sidebar-expand-btn:hover {
  background-color: var(--sidebar-hover-bg);
  color: var(--text-primary);
}

/* Song (child) lists — hidden by default;
   shown when parent has the expanded class (set by main.js) */
.sidebar-parent > ul {
  display: none;
}

.sidebar-parent.expanded > ul {
  display: block;
}

/* Song links — depth 2 */
.sidebar-parent > ul > li > a {
  display: block;
  padding: 0.25rem 0.75rem 0.25rem 1.4rem;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.sidebar-parent > ul > li > a:hover {
  background-color: var(--sidebar-hover-bg);
}

.sidebar-parent > ul > li > a.sidebar-active {
  background-color: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}

/* Depth-2 parent rows (e.g. Northern Prefectures inside Geography)
   — indented and normal weight to distinguish from depth-1 parents */
.sidebar-parent > ul > li.sidebar-parent > .sidebar-parent-row > a {
  padding-left: 1.4rem;
  font-weight: normal;
}

/* Depth-3 leaf links (e.g. prefecture pages inside a region parent) */
.sidebar-parent > ul > li.sidebar-parent > ul > li > a {
  display: block;
  padding: 0.25rem 0.75rem 0.25rem 2.2rem;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.sidebar-parent > ul > li.sidebar-parent > ul > li > a:hover {
  background-color: var(--sidebar-hover-bg);
}

.sidebar-parent > ul > li.sidebar-parent > ul > li > a.sidebar-active {
  background-color: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}


/* ----------------------------------------------------------------
   SECTION I — MAIN CONTENT
   ---------------------------------------------------------------- */

#main-content {
  padding: 1.5rem 2rem;
  background-color: var(--bg-content);
  color: var(--text-primary);
  min-height: 60vh;
}

#main-content h1 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: var(--text-heading);
  border-bottom: 2px solid var(--border-strong);
  padding-bottom: 0.35rem;
  margin-bottom: 1rem;
}

#main-content h2 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--text-heading);
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}

#main-content h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-heading);
  margin-top: 1.25rem;
  margin-bottom: 0.3rem;
}

#main-content h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--text-heading);
  margin-top: 1rem;
  margin-bottom: 0.25rem;
}

#main-content p {
  margin-bottom: 0.8rem;
}

#main-content a {
  color: var(--text-link);
}

#main-content a:visited {
  color: var(--text-link-visited);
}

#main-content a:active {
  color: var(--text-link-active);
}

#main-content dl {
  margin-bottom: 1rem;
}

#main-content dt {
  font-weight: bold;
  margin-top: 0.75rem;
}

#main-content dd {
  margin-left: 1.5rem;
}


/* ----------------------------------------------------------------
   SECTION J — SONG PAGE
   ---------------------------------------------------------------- */

.song-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.song-meta .song-album {
  font-weight: bold;
  color: var(--text-link);
}

.song-meta .song-album:visited {
  color: var(--text-link-visited);
}

.lyrics {
  margin-top: 0.5rem;
}

.lyrics-section {
  margin-bottom: 1.25rem;
}

/* Lyric section labels styled as small uppercase dividers */
.lyrics-section h2 {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2rem;
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
}

.lyrics-section p {
  line-height: 1.85;
  margin-bottom: 0.6rem;
}

.instrumental {
  color: var(--text-secondary);
  font-style: italic;
}


/* ----------------------------------------------------------------
   SECTION K — FOOTER
   ---------------------------------------------------------------- */

#site-footer {
  background-color: var(--bg-footer);
  border-top: 2px solid var(--border-strong);
  padding: 0.75rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

#site-footer p {
  margin-bottom: 0.2rem;
  line-height: 1.5;
}

.footer-tagline {
  font-family: var(--font-heading);
}


/* ----------------------------------------------------------------
   SECTION L — OPTIONS PANEL
   ---------------------------------------------------------------- */

#options-panel {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: 1000;
  min-width: 180px;
  background-color: var(--bg-options);
  border: 1px solid var(--border-options);
  border-top: none;
  padding: 0.75rem;
  padding-right: 2.5rem; /* reserve space so legend text doesn't run under close button */
  box-shadow: -2px 2px 8px var(--shadow);
}

#options-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.1rem 0.45rem;
  background: none;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1.2;
  color: var(--text-primary);
}

#options-close:hover {
  background-color: var(--sidebar-hover-bg);
}

#options-panel fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

#options-panel legend {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  padding: 0;
}

.theme-group-label {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  margin-top: 0.6rem;
  padding-top: 0.4rem;
  margin-bottom: 0.2rem;
}

.theme-group-label:first-of-type {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

#options-panel label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-primary);
  padding: 0.15rem 0;
  cursor: pointer;
}

.auto-theme-label {
  margin-top: 0.1rem;
}

.auto-theme-note {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 0.25rem;
  min-height: 1em; /* prevent panel jumping when text appears/disappears */
}


/* ----------------------------------------------------------------
   SECTION M — BACK TO TOP
   ---------------------------------------------------------------- */

#back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  padding: 0.35rem 0.65rem;
  background-color: var(--bg-nav);
  color: var(--text-nav);
  border: 1px solid var(--border-nav);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.85rem;
  box-shadow: 1px 1px 4px var(--shadow);
}

#back-to-top:hover {
  background-color: var(--sidebar-hover-bg);
}


/* ----------------------------------------------------------------
   SECTION N — FOCUS STYLES
   ---------------------------------------------------------------- */

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px dotted var(--text-primary);
  outline-offset: 2px;
}

/* h1 receives programmatic focus from back-to-top only;
   suppress the visible ring for pointer/keyboard users */
h1[tabindex="-1"]:focus {
  outline: none;
}