/* ByteByteGo Theme & Typography Engine Styles */

/* Lexica Ultralegible Web Fonts */
@font-face {
  font-family: 'Lexica Ultralegible';
  src: url('../fonts/lexica/LexicaUltralegible-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Lexica Ultralegible';
  src: url('../fonts/lexica/LexicaUltralegible-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Lexica Ultralegible';
  src: url('../fonts/lexica/LexicaUltralegible-Italic.woff2') format('woff2');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Lexica Ultralegible';
  src: url('../fonts/lexica/LexicaUltralegible-BoldItalic.woff2') format('woff2');
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

/* Base Light Theme Tokens */
:root {
  --bg-page: #FFFFFF;
  --bg-surface: #F8FAFC;
  --bg-sidebar: #0F172A;
  --bg-sidebar-hover: #1E293B;
  --bg-sidebar-active: #00BA83;
  --sidebar-text: #F1F5F9;
  --sidebar-title: #FFFFFF;
  --sidebar-muted: #94A3B8;
  --sidebar-search-bg: rgba(255, 255, 255, 0.08);
  --sidebar-search-border: rgba(255, 255, 255, 0.14);
  --sidebar-search-text: #FFFFFF;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-subtle: #94A3B8;
  --border-color: #E2E8F0;
  --border-subtle: #F1F5F9;
  --primary: #00BA83;
  --primary-hover: #009E6F;
  --primary-subtle: rgba(0, 186, 131, 0.1);
  --header-height: 54px;
  --sidebar-width: 310px;
  --reader-font: 'Lexica Ultralegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --reader-font-size: 16px;
  --reader-line-height: 1.75;
  --reader-max-width: 740px;
  --reader-text-align: left;
  --reader-hyphens: auto;
  --reader-mobile-pad: 14px;

  /* Code Section Theme (Light) */
  --code-bg: #F8FAFC;
  --code-header-bg: #EDF2F7;
  --code-border: #E2E8F0;
  --code-text: #0F172A;
  --code-tab-active-bg: #FFFFFF;
  --code-tab-active-text: #00BA83;
  --code-tab-inactive-text: #64748B;
  --code-copy-bg: rgba(0, 0, 0, 0.05);
  --code-copy-border: rgba(0, 0, 0, 0.1);
  --code-copy-text: #475569;
  --code-shadow: rgba(0, 0, 0, 0.04);
}

/* Sepia Theme */
[data-theme="sepia"] {
  --bg-page: #FBF0D9;
  --bg-surface: #F4E4C1;
  --bg-sidebar: #2D2013;
  --bg-sidebar-hover: #3D2C1B;
  --bg-sidebar-active: #8E5316;
  --sidebar-text: #F8FAFC;
  --sidebar-title: #FFFFFF;
  --sidebar-muted: #D1B89D;
  --sidebar-search-bg: rgba(255, 255, 255, 0.08);
  --sidebar-search-border: rgba(255, 255, 255, 0.14);
  --sidebar-search-text: #FFFFFF;
  --text-main: #2D2013;
  --text-muted: #73573C;
  --text-subtle: #9E7D5D;
  --border-color: #E5D5B8;
  --border-subtle: #ECE1CD;
  --primary: #8E5316;
  --primary-hover: #724210;
  --primary-subtle: rgba(142, 83, 22, 0.14);

  /* Code Section Theme (Cream / Parchment) */
  --code-bg: #F4E4C1;
  --code-header-bg: #EBD7B0;
  --code-border: #E0CFAC;
  --code-text: #2D2013;
  --code-tab-active-bg: #FBF0D9;
  --code-tab-active-text: #8E5316;
  --code-tab-inactive-text: #73573C;
  --code-copy-bg: rgba(142, 83, 22, 0.08);
  --code-copy-border: rgba(142, 83, 22, 0.2);
  --code-copy-text: #8E5316;
  --code-shadow: rgba(142, 83, 22, 0.08);
}

/* Dark Theme (Charcoal Slate) */
[data-theme="dark"] {
  --bg-page: #0B0F19;
  --bg-surface: #111827;
  --bg-sidebar: #070A10;
  --bg-sidebar-hover: #1F2937;
  --bg-sidebar-active: #10B981;
  --sidebar-text: #F1F5F9;
  --sidebar-title: #FFFFFF;
  --sidebar-muted: #94A3B8;
  --sidebar-search-bg: rgba(255, 255, 255, 0.07);
  --sidebar-search-border: rgba(255, 255, 255, 0.12);
  --sidebar-search-text: #FFFFFF;
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-subtle: #64748B;
  --border-color: #1F2937;
  --border-subtle: #161F2E;
  --primary: #10B981;
  --primary-hover: #059669;
  --primary-subtle: rgba(16, 185, 129, 0.15);

  /* Code Section Theme (Slate 900) */
  --code-bg: #111827;
  --code-header-bg: #1E293B;
  --code-border: #334155;
  --code-text: #F1F5F9;
  --code-tab-active-bg: #0F172A;
  --code-tab-active-text: #10B981;
  --code-tab-inactive-text: #94A3B8;
  --code-copy-bg: rgba(255, 255, 255, 0.08);
  --code-copy-border: rgba(255, 255, 255, 0.15);
  --code-copy-text: #E2E8F0;
  --code-shadow: rgba(0, 0, 0, 0.2);
}

/* OLED Black Theme */
[data-theme="oled"] {
  --bg-page: #000000;
  --bg-surface: #0A0A0A;
  --bg-sidebar: #000000;
  --bg-sidebar-hover: #141414;
  --bg-sidebar-active: #00E161;
  --sidebar-text: #E5E7EB;
  --sidebar-title: #FFFFFF;
  --sidebar-muted: #8892B0;
  --sidebar-search-bg: rgba(255, 255, 255, 0.07);
  --sidebar-search-border: rgba(255, 255, 255, 0.12);
  --sidebar-search-text: #FFFFFF;
  --text-main: #E5E7EB;
  --text-muted: #8892B0;
  --text-subtle: #555E75;
  --border-color: #1F1F1F;
  --border-subtle: #141414;
  --primary: #00E161;
  --primary-hover: #00C853;
  --primary-subtle: rgba(0, 225, 97, 0.15);

  /* Code Section Theme (Pitch Black) */
  --code-bg: #050505;
  --code-header-bg: #121212;
  --code-border: #262626;
  --code-text: #E5E7EB;
  --code-tab-active-bg: #1A1A1A;
  --code-tab-active-text: #00E161;
  --code-tab-inactive-text: #8892B0;
  --code-copy-bg: rgba(255, 255, 255, 0.08);
  --code-copy-border: rgba(255, 255, 255, 0.15);
  --code-copy-text: #E5E7EB;
  --code-shadow: rgba(0, 0, 0, 0.4);
}

/* Optical scaling for Monospace font */
[data-font="mono"] .bbg-article,
.bbg-article[data-font="mono"] {
  font-size: calc(var(--reader-font-size) * 0.91);
  letter-spacing: -0.01em;
}

/* ==========================================================================
   READING SETTINGS MODAL & TYPOGRAPHY CONTROLS
   ========================================================================== */
.bbg-settings-modal {
  display: none;
  position: fixed;
  top: 64px;
  right: 24px;
  width: 330px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  z-index: 1000;
  backdrop-filter: blur(8px);
}

.bbg-settings-modal.open {
  display: block;
  animation: modalFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.bbg-settings-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: -16px;
  background: var(--bg-surface);
  z-index: 2;
  margin-top: -8px;
  padding-top: 8px;
}

.bbg-modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  padding: 2px 6px;
}

.bbg-modal-close:hover {
  color: var(--text-main);
}

.bbg-setting-row {
  margin-bottom: 14px;
}

.bbg-row-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.bbg-btn-group {
  display: flex;
  background: rgba(0, 0, 0, 0.04);
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.bbg-group-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 6px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.bbg-group-btn:hover {
  color: var(--text-main);
}

.bbg-group-btn.active {
  background: var(--bg-page);
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Typeface Grid */
#bbgFontGroup {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  background: none;
  border: none;
  padding: 0;
}

#bbgFontGroup .bbg-group-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 7px 4px 6px;
  border-radius: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  cursor: pointer;
  text-align: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  min-height: 52px;
}

#bbgFontGroup .bbg-group-btn:hover {
  transform: translateY(-1px);
  border-color: var(--primary);
}

#bbgFontGroup .bbg-group-btn.active {
  background: var(--bg-page);
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary);
  color: var(--text-main);
}

#bbgFontGroup .bbg-group-btn[data-f="lexica"],
[data-f="lexica"] .bbg-font-sample,
[data-f="lexica"] .bbg-font-name {
  font-family: 'Lexica Ultralegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
}

#bbgFontGroup .bbg-group-btn[data-f="system"],
[data-f="system"] .bbg-font-sample,
[data-f="system"] .bbg-font-name {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif !important;
}

#bbgFontGroup .bbg-group-btn[data-f="serif"],
[data-f="serif"] .bbg-font-sample,
[data-f="serif"] .bbg-font-name {
  font-family: Georgia, Cambria, 'Times New Roman', serif !important;
}

#bbgFontGroup .bbg-group-btn[data-f="mono"],
[data-f="mono"] .bbg-font-sample,
[data-f="mono"] .bbg-font-name {
  font-family: 'JetBrains Mono', Consolas, Monaco, monospace !important;
}

.bbg-font-sample {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 2px;
  pointer-events: none;
}

.bbg-font-name {
  display: block;
  font-size: 11px;
  font-weight: 600;
  opacity: 0.9;
  pointer-events: none;
}

/* Theme Grid */
.bbg-theme-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
}

.bbg-theme-chip {
  padding: 8px 3px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  text-align: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bbg-theme-chip:hover {
  transform: translateY(-1px);
}

.bbg-theme-chip.active {
  box-shadow: 0 0 0 2px var(--primary);
}

/* Prism Custom Theme Button */
.bbg-theme-chip[data-t="custom"] {
  background: #181926 !important;
  color: #FFFFFF !important;
  border: 1px solid rgba(255, 255, 255, 0.22) !important;
  position: relative;
  overflow: hidden;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.bbg-theme-chip[data-t="custom"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2.5px;
  background: linear-gradient(90deg, #FF6B6B, #F06595, #BD93F9, #4D96FF, #00E161, #FFD93D);
}

.bbg-theme-chip[data-t="custom"].active {
  box-shadow: 0 0 0 2px #BD93F9, 0 0 10px rgba(189, 147, 249, 0.35);
}

/* Custom Theme Panel */
.bbg-custom-panel {
  display: none;
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.bbg-custom-panel.open,
[data-theme="custom"] .bbg-custom-panel {
  display: block;
  animation: modalFadeIn 0.2s ease;
}

.bbg-custom-section-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.bbg-custom-presets {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.bbg-preset-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
}

.bbg-preset-btn:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.bbg-preset-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(0, 0, 0, 0.2);
}

.bbg-color-pickers-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.bbg-color-field label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.bbg-color-input-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 3px 4px;
}

.bbg-color-input-wrap input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  cursor: pointer;
  background: none;
  padding: 0;
}

.bbg-color-input-wrap input[type="text"] {
  width: 100%;
  border: none;
  background: none;
  font-size: 11px;
  font-family: monospace;
  color: var(--text-main);
  outline: none;
}

/* Font Size Slider */
.bbg-size-control-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.04);
  padding: 3px 6px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.bbg-size-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
}

.bbg-size-btn:hover {
  background: var(--bg-page);
  color: var(--text-main);
}

.bbg-size-slider-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 4px;
}

.bbg-size-slider {
  flex: 1;
  height: 4px;
  accent-color: var(--primary);
  cursor: pointer;
}

.bbg-size-badge {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 6px;
  border-radius: 5px;
  min-width: 44px;
  text-align: center;
  cursor: pointer;
}

.bbg-size-badge:hover {
  border-color: var(--primary);
}

/* Settings Modal Footer & Reset Button */
.bbg-settings-footer {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

.bbg-reset-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.bbg-reset-btn:hover {
  background: var(--bg-surface);
  border-color: var(--primary);
  color: var(--primary);
}

.bbg-drawer-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  z-index: 998;
}

body.sider-open .bbg-drawer-backdrop {
  display: block;
}

@media (max-width: 768px) {
  .bbg-settings-modal {
    top: auto;
    bottom: 14px;
    left: 12px;
    right: 12px;
    width: auto;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    overscroll-behavior: contain;
    transition: bottom 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease, transform 0.2s ease;
  }

  .bbg-reader-bottom-bar.nav-visible ~ .bbg-settings-modal {
    bottom: 64px;
    max-height: calc(100vh - 130px);
  }
}