/* ==========================================================================
   SmartDayBudget — Master Fintech Design System (styles.css)
   Linear / Apple Utilities / Wise Minimalist Design Language
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@600;700;800&display=swap');

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS & THEMING (LIGHT & DARK MODE)
   -------------------------------------------------------------------------- */
:root, [data-theme="light"] {
  /* Surface Colors */
  --bg-primary:      #FAFAFA;
  --bg-surface:      #FFFFFF;
  --bg-elevated:     #F4F4F5;
  --border-subtle:   #E4E4E7;
  --border-focus:    #D4D4D8;

  /* Typography Colors */
  --text-primary:    #09090B;
  --text-secondary:  #71717A;
  --text-tertiary:   #A1A1AA;

  /* Accent Colors (Deep Forest Green) */
  --accent:          #166534;
  --accent-hover:    #14532D;
  --accent-subtle:   #F0FDF4;
  --accent-border:   #BBF7D0;

  /* System Alert Tokens */
  --warning-bg:     #FFFBEB;
  --warning-text:   #B4530A;
  --warning-border: #FDE68A;
  --error-bg:       #FEF2F2;
  --error-text:     #B91C1C;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);

  --header-bg:       rgba(255, 255, 255, 0.85);
  --scrim-bg:        rgba(9, 9, 11, 0.4);
}

[data-theme="dark"], body.dark-mode {
  /* Surface Colors */
  --bg-primary:      #09090B;
  --bg-surface:      #121215;
  --bg-elevated:     #1C1C21;
  --border-subtle:   #27272A;
  --border-focus:    #3F3F46;

  /* Typography Colors */
  --text-primary:    #F4F4F5;
  --text-secondary:  #A1A1AA;
  --text-tertiary:   #71717A;

  /* Accent Colors (Vibrant Green) */
  --accent:          #22C55E;
  --accent-hover:    #4ADE80;
  --accent-subtle:   rgba(34, 197, 94, 0.10);
  --accent-border:   rgba(34, 197, 94, 0.25);

  /* System Alert Tokens */
  --warning-bg:     #451A03;
  --warning-text:   #FDBA74;
  --warning-border: #78350F;
  --error-bg:       #450A0A;
  --error-text:     #FCA5A5;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);

  --header-bg:       rgba(9, 9, 11, 0.85);
  --header-border:   #1E1E24;
  --scrim-bg:        rgba(0, 0, 0, 0.75);
}

/* --------------------------------------------------------------------------
   2. GLOBAL TYPOGRAPHY & RESET
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden !important;
  max-width: 100vw;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden !important;
  max-width: 100vw;
}

/* Strict Logo & Brand Icon Size Constraints (Fix Viewport Blowout) */
.sdb-brand-icon,
.sdb-brand img,
.sdb-brand svg,
.sdb-logo-img,
.sdb-logo img,
.sdb-logo svg,
.sdb-brand-logo,
.sdb-logo-icon,
.sdb-mobile-drawer-brand img,
.sdb-mobile-drawer-brand svg,
.sdb-logo img {
  width: 32px !important;
  height: 32px !important;
  max-width: 32px !important;
  max-height: 32px !important;
  object-fit: contain;
  display: inline-block;
  vertical-align: middle;
}

/* Tabular Monospace Data Display */
.tabular-nums, .sdb-big-number, .sdb-breakdown-row strong, pre {
  font-family: 'IBM Plex Mono', SFMono-Regular, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  color: var(--text-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

@media (min-width: 768px) {
  h1 { font-size: 2.75rem; }
  h2 { font-size: 2rem; }
}

.sdb-hero-title {
  font-size: 2.25rem;
  letter-spacing: -0.03em;
  font-weight: 700;
}
@media (min-width: 768px) {
  .sdb-hero-title { font-size: 3.25rem; }
}

p {
  color: var(--text-secondary);
  font-size: 1rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 100ms ease-out;
}
a:hover {
  color: var(--accent-hover);
}

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

.hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   3. STICKY TOP NAVIGATION & MEGA-MENU
   -------------------------------------------------------------------------- */
.sdb-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.sdb-nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand */
.sdb-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.sdb-brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: contain;
}

/* Menu items */
.sdb-nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.sdb-nav-item {
  position: relative;
}

.sdb-nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  cursor: pointer;
  transition: color 100ms ease-out;
}
.sdb-nav-link:hover, .sdb-nav-item.active .sdb-nav-link {
  color: var(--text-primary);
}

.sdb-nav-arrow {
  font-size: 0.7rem;
  transition: transform 150ms ease-out;
}
.sdb-nav-dropdown:hover .sdb-nav-arrow,
.sdb-nav-dropdown.active .sdb-nav-arrow {
  transform: rotate(180deg);
}

/* Mega Menu Dropdown Hidden by Default */
.sdb-mega-menu {
  display: none;
}

/* Category Column Headers */
.sdb-mega-col-title {
  font-size: 0.75rem !important;
  font-weight: 700 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.08em !important;
  color: #475569 !important;
  margin-bottom: 0.75rem !important;
  padding-bottom: 0.35rem !important;
  border-bottom: 1px solid #e2e8f0 !important;
}

[data-theme="dark"] .sdb-mega-col-title,
body.dark-mode .sdb-mega-col-title {
  color: #94a3b8 !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
}

/* Link Lists Structure */
.sdb-mega-link-list {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 0.35rem !important;
}

/* Concrete Clickable Link Nodes */
.sdb-mega-link {
  display: block !important;
  padding: 0.5rem 0.65rem !important;
  border-radius: 8px !important;
  text-decoration: none !important;
  background: transparent !important;
  transition: background 0.15s ease, transform 0.1s ease !important;
}

.sdb-mega-link:hover {
  background: rgba(15, 81, 50, 0.06) !important;
}

[data-theme="dark"] .sdb-mega-link:hover,
body.dark-mode .sdb-mega-link:hover {
  background: rgba(255, 255, 255, 0.06) !important;
}

/* Mandatory Text Rendering (Eliminates Invisible Gaps) */
.sdb-mega-link-title {
  display: block !important;
  font-size: 0.875rem !important;
  font-weight: 600 !important;
  color: #0f5132 !important; /* Dark forest green */
  line-height: 1.25 !important;
  opacity: 1 !important;
  visibility: visible !important;
  transition: color 0.15s ease !important;
}

.sdb-mega-link:hover .sdb-mega-link-title {
  color: #047857 !important; /* Guide card emerald hover */
}

[data-theme="dark"] .sdb-mega-link-title,
body.dark-mode .sdb-mega-link-title {
  color: #34d399 !important; /* Crisp emerald green */
}

[data-theme="dark"] .sdb-mega-link:hover .sdb-mega-link-title,
body.dark-mode .sdb-mega-link:hover .sdb-mega-link-title {
  color: #6ee7b7 !important; /* Bright emerald hover */
}

.sdb-mega-link-desc {
  display: block !important;
  font-size: 0.75rem !important;
  color: #475569 !important; /* High-contrast slate gray */
  margin-top: 0.15rem !important;
  line-height: 1.2 !important;
  opacity: 1 !important;
  visibility: visible !important;
}

[data-theme="dark"] .sdb-mega-link-desc,
body.dark-mode .sdb-mega-link-desc {
  color: #94a3b8 !important; /* Readable slate/gray */
}

/* Mega-Menu Container Themed Surfaces & High-Contrast Utility Bar */
[data-theme="light"] .sdb-mega-menu {
  background: #ffffff !important;
  border-color: #e4e4e7 !important;
  box-shadow: 0 20px 40px -8px rgba(0, 0, 0, 0.12) !important;
}

[data-theme="light"] .sdb-mega-utility-bar {
  border-top-color: #e4e4e7 !important;
}

[data-theme="light"] .sdb-utility-label {
  color: #475569 !important;
}

[data-theme="light"] .sdb-utility-pill {
  background: #f4f4f5 !important;
  border-color: #e4e4e7 !important;
  color: #0f172a !important;
}

[data-theme="light"] .sdb-utility-pill:hover {
  background: #0f5132 !important;
  color: #ffffff !important;
}

/* Custom Sleek Scrollbar */
.sdb-mega-menu::-webkit-scrollbar,
.sdb-dropdown-menu::-webkit-scrollbar,
.sdb-nav-mega-dropdown::-webkit-scrollbar {
  width: 6px;
}
.sdb-mega-menu::-webkit-scrollbar-track,
.sdb-dropdown-menu::-webkit-scrollbar-track,
.sdb-nav-mega-dropdown::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.02);
}
.sdb-mega-menu::-webkit-scrollbar-thumb,
.sdb-dropdown-menu::-webkit-scrollbar-thumb,
.sdb-nav-mega-dropdown::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}
.sdb-mega-menu::-webkit-scrollbar-thumb:hover,
.sdb-dropdown-menu::-webkit-scrollbar-thumb:hover,
.sdb-nav-mega-dropdown::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.35);
}

.sdb-mega-footer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
}

.sdb-mega-view-all {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

/* Header Actions */
.sdb-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sdb-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 100ms ease-out, border-color 100ms ease-out;
}
.sdb-icon-btn:hover {
  background: var(--bg-elevated);
  border-color: var(--text-tertiary);
}

.sdb-mobile-menu-btn {
  display: none;
}

/* --------------------------------------------------------------------------
   4. SLIDE-OVER SETTINGS PANEL & SCRIM
   -------------------------------------------------------------------------- */
.sdb-settings-scrim,
#settings-scrim,
.settings-modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--scrim-bg);
  backdrop-filter: blur(4px);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease-out, visibility 200ms;
}
.sdb-settings-scrim.open,
#settings-scrim.open,
.settings-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.sdb-settings-panel,
#settings-modal {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 380px;
  max-width: 100vw;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-lg);
  z-index: 1101;
  transform: translateX(100%);
  transition: transform 200ms ease-out;
  display: flex;
  flex-direction: column;
}

/* Desktop Unified Settings Button */
.sdb-desktop-settings-btn,
.settings-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 14px;
  border-radius: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.sdb-desktop-settings-btn:hover,
.settings-btn:hover {
  background: var(--bg-elevated);
  border-color: var(--border-focus);
}
.sdb-desktop-settings-btn .sdb-gear-icon,
.settings-btn .sdb-gear-icon,
.settings-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}
.sdb-settings-panel.open,
#settings-modal.open {
  transform: translateX(0);
}

.sdb-settings-header {
  padding: 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sdb-settings-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.sdb-settings-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 4px;
}
.sdb-settings-close:hover {
  color: var(--text-primary);
}

.sdb-settings-body {
  padding: 24px;
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.sdb-setting-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sdb-setting-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Segmented Control */
.sdb-segmented-control {
  display: flex;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 3px;
  gap: 3px;
}

.sdb-segment-btn {
  flex: 1;
  padding: 8px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 100ms ease-out, color 100ms ease-out;
}
.sdb-segment-btn.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   5. COMPONENT LIBRARY (BUTTONS, INPUTS, CARDS, BADGES)
   -------------------------------------------------------------------------- */

/* Buttons */
.sdb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 100ms ease-out, border-color 100ms ease-out;
  text-decoration: none;
}

.sdb-btn-primary {
  background-color: var(--accent);
  color: #FFFFFF;
}
.sdb-btn-primary:hover {
  background-color: var(--accent-hover);
  color: #FFFFFF;
}

.sdb-btn-secondary {
  background-color: var(--bg-surface);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}
.sdb-btn-secondary:hover {
  background-color: var(--bg-elevated);
}

.sdb-btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
}
.sdb-btn-ghost:hover {
  color: var(--text-primary);
  background-color: var(--bg-elevated);
}

/* Inputs & Forms */
.sdb-input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sdb-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.sdb-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.sdb-input, .sdb-select {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  transition: border-color 100ms ease-out, box-shadow 100ms ease-out;
  appearance: none;
}
.sdb-input:focus, .sdb-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

/* Currency Prefix Variant */
[data-currency-prefix]::before {
  content: attr(data-currency-prefix);
  position: absolute;
  left: 14px;
  font-weight: 500;
  color: var(--text-tertiary);
  pointer-events: none;
  font-family: 'IBM Plex Mono', monospace;
}
[data-currency-prefix] .sdb-input {
  padding-left: 36px;
}

/* Cards */
.sdb-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 150ms ease-out, border-color 150ms ease-out;
}
.sdb-card:hover {
  box-shadow: var(--shadow-md);
}

/* Badges / Tags */
.sdb-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
}

.sdb-badge-accent {
  background-color: var(--accent-subtle);
  color: var(--accent);
}

/* Dynamic Input Rows & Delete Action */
.sdb-dynamic-row, .expense-row {
  display: grid;
  grid-template-columns: 1fr 140px 36px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}
.sdb-dynamic-row .sdb-input,
.sdb-dynamic-row .sdb-input-wrapper,
.expense-row .item-name,
.expense-row .item-amount {
  width: 100%;
  min-width: 0;
}

.sdb-row-delete-btn, .btn-remove {
  width: 36px;
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--error-text);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 100ms ease-out, border-color 100ms ease-out, color 100ms ease-out;
  flex-shrink: 0;
}
.sdb-row-delete-btn:hover, .btn-remove:hover {
  background-color: var(--error-bg);
  border-color: var(--error-text);
  color: var(--error-text);
}

.suggestion-pills-box {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 4px;
  margin-bottom: 12px;
}

.suggestion-pill {
  cursor: pointer;
  user-select: none;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: background-color 100ms ease-out, color 100ms ease-out, border-color 100ms ease-out;
}
.suggestion-pill:hover {
  background-color: var(--accent-subtle);
  color: var(--accent);
  border-color: var(--accent-border);
}

/* Multi-Product Break-Even Dynamic Ledger */
.mp-row {
  display: grid;
  grid-template-columns: 2fr 1.3fr 1.3fr 1.1fr 38px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

@media (max-width: 768px) {
  .mp-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: var(--bg-elevated);
    margin-bottom: 12px;
  }
  .mp-row .item-name {
    grid-column: 1 / -1;
  }
  .mp-row .sdb-row-delete-btn,
  .mp-row .remove-mp {
    grid-column: 1 / -1;
    width: 100%;
    height: 34px;
    font-size: 0.9rem;
    font-weight: 600;
  }
}

/* Multi-Card Dynamic Ledger & Payoff Strategy Components */
.sdb-card-debt-row {
  display: grid;
  grid-template-columns: 2.2fr 1.6fr 1.2fr 1.6fr 38px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

.sdb-card-debt-header {
  display: grid;
  grid-template-columns: 2.2fr 1.6fr 1.2fr 1.6fr 38px;
  gap: 8px;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 6px;
  padding: 0 4px;
}

@media (max-width: 768px) {
  .sdb-card-debt-header {
    display: none;
  }
  .sdb-card-debt-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: var(--bg-elevated);
    margin-bottom: 12px;
  }
  .sdb-card-debt-row .item-name {
    grid-column: 1 / -1;
  }
  .sdb-card-debt-row .sdb-row-delete-btn {
    grid-column: 1 / -1;
    width: 100%;
    height: 34px;
    font-size: 0.9rem;
    font-weight: 600;
  }
}

.sdb-strategy-callout {
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 16px;
}

.sdb-strategy-callout-headline {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sdb-strategy-callout-sub {
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.sdb-strategy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

@media (max-width: 600px) {
  .sdb-strategy-grid {
    grid-template-columns: 1fr;
  }
}

.sdb-strategy-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 14px;
  cursor: pointer;
  transition: border-color 120ms ease-out, background-color 120ms ease-out, box-shadow 120ms ease-out;
  text-align: left;
}

.sdb-strategy-card:hover {
  border-color: var(--accent);
}

.sdb-strategy-card.active {
  border-color: var(--accent);
  background: var(--accent-subtle);
  box-shadow: 0 0 0 1px var(--accent);
}

.sdb-strategy-card-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.sdb-strategy-card.active .sdb-strategy-card-title {
  color: var(--accent);
}

.sdb-strategy-metric {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.sdb-strategy-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sdb-payoff-sequence {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.sdb-payoff-step {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 500;
}

.sdb-payoff-step-num {
  font-weight: 700;
  color: var(--accent);
}

/* Sinking Funds Dynamic Multi-Goal Ledger Components */
.sdb-sinking-fund-row {
  display: grid;
  grid-template-columns: 2fr 1.3fr 1.3fr 1.6fr 1.1fr 38px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

.sdb-sinking-fund-header {
  display: grid;
  grid-template-columns: 2fr 1.3fr 1.3fr 1.6fr 1.1fr 38px;
  gap: 8px;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 6px;
  padding: 0 4px;
}

.sdb-sub-rate-preview {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-align: right;
  padding-right: 4px;
  white-space: nowrap;
}

.sdb-sub-rate-preview.met {
  color: var(--accent);
  font-size: 0.75rem;
}

@media (max-width: 768px) {
  .sdb-sinking-fund-header {
    display: none;
  }
  .sdb-sinking-fund-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: var(--bg-elevated);
    margin-bottom: 12px;
  }
  .sdb-sinking-fund-row .item-name {
    grid-column: 1 / -1;
  }
  .sdb-sinking-fund-row .item-time-wrapper {
    grid-column: 1 / -1;
  }
  .sdb-sinking-fund-row .sdb-sub-rate-preview {
    grid-column: 1 / 2;
    text-align: left;
    font-size: 0.9rem;
    align-self: center;
  }
  .sdb-sinking-fund-row .sdb-row-delete-btn {
    grid-column: 2 / 3;
    width: 100%;
    height: 34px;
    font-size: 0.9rem;
    font-weight: 600;
  }
}

/* Sinking Funds Bucket Breakdown List */
.sdb-bucket-breakdown {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
  border-top: 1px solid var(--accent-border);
  padding-top: 12px;
}

.sdb-bucket-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  font-size: 0.875rem;
}

.sdb-bucket-item-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sdb-bucket-name {
  font-weight: 600;
  color: var(--text-primary);
}

.sdb-bucket-meta {
  font-size: 0.775rem;
  color: var(--text-secondary);
}

.sdb-bucket-item-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.sdb-bucket-rate {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 700;
  color: var(--text-primary);
}

.sdb-bucket-badge {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 9999px;
  font-weight: 600;
}


/* FAQ Accordion Component */
.sdb-faq-section {
  margin-top: 2rem;
}

.sdb-section-header {
  margin-bottom: 1.5rem;
  text-align: center;
}

.sdb-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.sdb-section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

.sdb-faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.sdb-faq-item {
  border: 1px solid var(--sdb-border, var(--border-subtle, #e2e8f0));
  border-radius: var(--sdb-radius, 8px);
  background: var(--sdb-surface, var(--bg-surface, #ffffff));
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.sdb-faq-item.open {
  border-color: var(--sdb-primary, var(--accent-primary, #2563eb));
}

.sdb-faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.125rem 1.25rem;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  color: var(--sdb-text-main, var(--text-primary, #1e293b));
}

.sdb-faq-icon {
  font-size: 1.25rem;
  font-weight: 400;
  transition: transform 0.2s ease;
}

.sdb-faq-item.open .sdb-faq-icon {
  transform: rotate(45deg);
}

.sdb-faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem 1.25rem;
  color: var(--sdb-text-muted, var(--text-secondary, #64748b));
  line-height: 1.6;
  font-size: 0.95rem;
}

.sdb-faq-item.open .sdb-faq-answer {
  display: block;
}

/* --------------------------------------------------------------------------
   6. SIGNATURE ELEMENT: "BIG NUMBER" CALCULATOR RESULT PANEL
   -------------------------------------------------------------------------- */
.sdb-result-panel {
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.sdb-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sdb-result-label {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.sdb-big-number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin: 8px 0;
}
@media (min-width: 768px) {
  .sdb-big-number { font-size: 3.5rem; }
}

.sdb-result-breakdown {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--accent-border);
}

.sdb-breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
}
.sdb-breakdown-row span {
  color: var(--text-secondary);
}
.sdb-breakdown-row strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   7. LAYOUT CONTAINERS
   -------------------------------------------------------------------------- */
.sdb-main-layout {
  flex: 1;
  width: 100%;
}

.sdb-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px;
}

.sdb-container-readable {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px;
}

.sdb-grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 768px) {
  .sdb-grid-2 { grid-template-columns: 1fr 1fr; }
}

/* --------------------------------------------------------------------------
   8. FOOTER SITEMAP
   -------------------------------------------------------------------------- */
.sdb-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding-top: 64px;
  padding-bottom: 32px;
  margin-top: auto;
}

.sdb-footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.sdb-footer-sitemap {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}
@media (min-width: 640px) {
  .sdb-footer-sitemap { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .sdb-footer-sitemap { grid-template-columns: repeat(6, 1fr); }
}

.sdb-footer-col-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.sdb-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sdb-footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.sdb-footer-link:hover {
  color: var(--text-primary);
}

.sdb-footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}
@media (min-width: 768px) {
  .sdb-footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ==========================================================================
   DESKTOP 4-PILLAR MEGA-MENU (>= 1024px) & MOBILE DRAWER STYLES
   ========================================================================== */
.sdb-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}

.sdb-brand-text {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.sdb-theme-toggle {
  background: transparent;
  border: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
  border-radius: 8px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text-primary);
}

@media (min-width: 1024px) {
  .sdb-desktop-nav { display: flex; align-items: center; gap: 1.25rem; }
  .sdb-hamburger-btn { display: none !important; }
  .sdb-dropdown-trigger { position: relative; }
  
  .sdb-mega-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: min(1320px, 96vw);
    background: var(--sdb-surface-elevated, var(--bg-surface, #0f172a));
    border: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    padding: 1.5rem;
    z-index: 1050;
  }

  .sdb-dropdown-trigger:hover .sdb-mega-menu,
  .sdb-dropdown-trigger:focus-within .sdb-mega-menu,
  .sdb-dropdown-trigger.active .sdb-mega-menu,
  #sdb-mega-menu-btn[aria-expanded="true"] + .sdb-mega-menu,
  .sdb-mega-menu.active { display: block !important; }
  
  .sdb-mega-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }

  .sdb-mega-col-title {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--sdb-accent, var(--accent-primary, #38bdf8));
    margin: 0 0 0.75rem 0;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
  }

  .sdb-mega-link-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
  }

  .sdb-mega-link {
    display: flex;
    flex-direction: column;
    padding: 0.3rem 0.45rem;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.15s ease;
  }

  .sdb-mega-link:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .sdb-mega-link-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--sdb-text-main, var(--text-primary, #f8fafc));
  }

  .sdb-mega-link-desc {
    font-size: 0.69rem;
    color: var(--sdb-text-muted, var(--text-secondary, #94a3b8));
    line-height: 1.2;
  }

  .sdb-mega-utility-bar {
    margin-top: 1.25rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  .sdb-utility-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--sdb-text-muted, var(--text-secondary, #94a3b8));
    white-space: nowrap;
  }

  .sdb-utility-pills-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .sdb-utility-pill {
    padding: 0.2rem 0.55rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
    font-size: 0.75rem;
    color: var(--sdb-text-main, var(--text-primary, #f8fafc));
    text-decoration: none;
  }

  .sdb-utility-pill:hover {
    background: var(--sdb-accent, var(--accent-primary, #38bdf8));
    color: #000;
  }

  .sdb-footer-sitemap {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
  }

  .sdb-footer-utility-row {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
    font-size: 0.85rem;
    color: var(--sdb-text-muted, var(--text-secondary, #94a3b8));
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
  }

  .sdb-footer-utility-row a {
    color: var(--sdb-text-muted, var(--text-secondary, #94a3b8));
    text-decoration: none;
  }

  .sdb-footer-utility-row a:hover {
    color: var(--sdb-accent, var(--accent-primary, #38bdf8));
  }
}

/* ==========================================================================
   MOBILE RESPONSIVE DRAWER & BACKDROP DEFAULTS
   ========================================================================== */
.sdb-drawer-backdrop,
.sdb-mobile-drawer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.sdb-mobile-drawer {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  width: min(380px, 88vw);
  height: 100vh;
  background: var(--sdb-surface-elevated, var(--bg-surface, #0f172a));
  border-left: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
  z-index: 2010;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (max-width: 1023px) {
  .sdb-desktop-nav { display: none !important; }
  .sdb-hamburger-btn {
    display: flex !important;
    background: transparent;
    border: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
    border-radius: 8px;
    width: 44px;
    height: 44px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
  }
  .sdb-hamburger-line { width: 20px; height: 2px; background: var(--sdb-text-main, var(--text-primary, #f8fafc)); }
  
  .sdb-drawer-backdrop,
  .sdb-mobile-drawer-overlay {
    display: block;
  }
  .sdb-drawer-backdrop.active,
  .sdb-mobile-drawer-overlay.active {
    opacity: 1;
    pointer-events: auto;
  }

  .sdb-mobile-drawer {
    display: flex;
    flex-direction: column;
  }
  .sdb-mobile-drawer.active {
    transform: translateX(0);
  }

  .sdb-drawer-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
  }
  .sdb-drawer-title { font-weight: 700; font-size: 1.05rem; color: var(--sdb-text-main, var(--text-primary, #f8fafc)); }
  
  .sdb-drawer-close {
    background: transparent; border: none; font-size: 1.75rem;
    color: var(--sdb-text-muted, var(--text-secondary, #94a3b8));
    min-width: 44px; min-height: 44px;
    display: flex; align-items: center; justify-content: center; cursor: pointer;
  }

  .sdb-drawer-search-box {
    position: relative;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
  }
  .sdb-drawer-search-input {
    width: 100%; height: 44px; padding: 0 2.25rem 0 0.85rem;
    background: var(--sdb-surface, var(--bg-surface, #1e293b));
    border: 1px solid var(--sdb-border, var(--border-subtle, #334155));
    border-radius: 8px; font-size: 0.9rem; color: #fff; outline: none;
  }
  .sdb-search-clear-btn {
    position: absolute; right: 1.65rem; top: 50%; transform: translateY(-50%);
    background: transparent; border: none; color: #94a3b8; font-size: 1.2rem; cursor: pointer;
  }

  .sdb-drawer-content, .sdb-drawer-search-results {
    flex: 1; overflow-y: auto; padding: 0.75rem 1rem 2rem 1rem;
    display: flex; flex-direction: column; gap: 0.5rem;
  }

  .sdb-drawer-accordion-group {
    border: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
    border-radius: 8px; background: rgba(255, 255, 255, 0.02); overflow: hidden;
  }
  .sdb-drawer-accordion-header {
    width: 100%; min-height: 48px; padding: 0.75rem 1rem;
    background: transparent; border: none; color: var(--sdb-text-main, var(--text-primary, #f8fafc));
    font-size: 0.92rem; font-weight: 600;
    display: flex; align-items: center; justify-content: space-between; cursor: pointer;
  }
  .sdb-accordion-chevron { font-size: 0.9rem; transition: transform 0.2s ease; color: #94a3b8; }
  .sdb-drawer-accordion-group.open .sdb-accordion-chevron { transform: rotate(180deg); }

  .sdb-drawer-accordion-body {
    display: none; flex-direction: column;
    padding: 0.25rem 0.5rem 0.5rem 0.5rem;
    border-top: 1px solid var(--sdb-border, var(--border-subtle, #1e293b));
    background: rgba(0, 0, 0, 0.2);
  }
  .sdb-drawer-accordion-group.open .sdb-drawer-accordion-body { display: flex; }

  .sdb-drawer-link {
    min-height: 48px; display: flex; align-items: center;
    padding: 0.65rem 0.75rem; border-radius: 6px;
    color: var(--sdb-text-muted, var(--text-secondary, #cbd5e1)); text-decoration: none; font-size: 0.9rem;
  }
  .sdb-drawer-link:active { background: rgba(56, 189, 248, 0.15); color: var(--sdb-accent, var(--accent-primary, #38bdf8)); }

  .sdb-footer-sitemap {
    display: flex; flex-direction: column; gap: 1.5rem;
  }
}

/* --------------------------------------------------------------------------
   9. NICHE-TO-CALCULATOR DYNAMIC ROUTING & PRESET COMPONENTS
   -------------------------------------------------------------------------- */
.sdb-niche-strip-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 10px 16px;
  margin-bottom: 24px;
  overflow: hidden;
}

.sdb-niche-strip-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  white-space: nowrap;
}

.sdb-niche-chips {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 2px 0;
  width: 100%;
}
.sdb-niche-chips::-webkit-scrollbar {
  display: none;
}

.sdb-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 9999px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.sdb-chip:hover {
  background: var(--accent-subtle);
  border-color: var(--accent-border);
  color: var(--accent);
}

.sdb-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .sdb-chip.active {
  background: var(--accent);
  color: #0d1f14;
}

/* Fee Schedule Callout Card */
.sdb-fee-schedule-card {
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 20px;
}

.sdb-fee-schedule-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.sdb-fee-schedule-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sdb-fee-schedule-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.sdb-fee-schedule-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.sdb-fee-schedule-item strong {
  color: var(--text-primary);
  font-family: 'IBM Plex Mono', monospace;
}

/* --------------------------------------------------------------------------
   10. BLOG POST HANDOFF COMPONENT ("Try This With Your Numbers")
   -------------------------------------------------------------------------- */
.sdb-blog-handoff-box {
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 12px;
  padding: 24px;
  margin: 32px 0;
}

.sdb-blog-handoff-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.sdb-blog-handoff-icon {
  font-size: 1.75rem;
  line-height: 1;
}

.sdb-blog-handoff-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.sdb-blog-handoff-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.sdb-blog-handoff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.sdb-blog-handoff-stat {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 10px 12px;
}

.sdb-blog-handoff-stat-label {
  font-size: 0.725rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.sdb-blog-handoff-stat-value {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.sdb-blog-handoff-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 20px;
  background-color: var(--accent);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 8px;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
}
.sdb-blog-handoff-cta:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

/* ==========================================================================
   YOUTUBE-STYLE MOBILE NAVIGATION (MOBILE ONLY: <= 768px)
   DESKTOP (> 768px) REMAINS 100% UNCHANGED
   ========================================================================== */

/* Hidden on Desktop (> 768px) */
.sdb-mobile-actions {
  display: none;
}
.sdb-bottom-nav {
  display: none;
}

@media (max-width: 768px) {
  /* Main page container padding to avoid bottom bar overlap */
  body:has(.sdb-bottom-nav),
  body:has(.sdb-bottom-nav) .sdb-main-layout {
    padding-bottom: 76px !important;
  }

  /* 1. Mobile Top App Bar (position: sticky; top: 0; z-index: 1000;) */
  .sdb-header {
    position: sticky !important;
    top: 0 !important;
    z-index: 1000 !important;
  }

  .sdb-header-inner {
    height: 56px !important;
    padding-left: 14px !important;
    padding-right: 14px !important;
  }

  /* Sharp Brand Logo in both themes */
  .sdb-logo-img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }

  /* Hide Desktop Nav & Desktop Settings Button on Mobile <= 768px */
  .sdb-desktop-nav,
  .sdb-desktop-settings-btn {
    display: none !important;
  }

  /* When YouTube-style mobile actions are present, hide old hamburger & standalone theme button */
  .sdb-header:has(.sdb-mobile-actions) .sdb-hamburger-btn,
  .sdb-header:has(.sdb-mobile-actions) #theme-toggle-btn {
    display: none !important;
  }

  /* Show Mobile Top Bar Action Buttons */
  .sdb-mobile-actions {
    display: flex !important;
    align-items: center;
    gap: 8px;
  }

  .sdb-mobile-action-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border-subtle, #e4e4e7);
    color: var(--text-primary, #09090b);
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease;
    padding: 0;
  }

  .sdb-mobile-action-btn:active {
    background: var(--bg-elevated, #f4f4f5);
    transform: scale(0.95);
  }

  [data-theme="dark"] .sdb-mobile-action-btn,
  body.dark-mode .sdb-mobile-action-btn {
    border-color: var(--border-subtle, #27272a);
    color: var(--text-primary, #f4f4f5);
  }

  [data-theme="dark"] .sdb-mobile-action-btn:active,
  body.dark-mode .sdb-mobile-action-btn:active {
    background: var(--bg-elevated, #1c1c21);
  }

  /* 2. Fixed Mobile Bottom Navigation Bar (YouTube Swipeable Style: 6 Links) */
  .sdb-bottom-nav {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scroll-behavior: smooth !important;
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: auto !important;
    min-height: 58px !important;
    background: var(--header-bg, rgba(255, 255, 255, 0.95)) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
    border-top: 1px solid var(--border-subtle, #e4e4e7) !important;
    z-index: 1000 !important;
    align-items: center !important;
    justify-content: flex-start !important;
    padding: 6px 8px max(8px, env(safe-area-inset-bottom, 0px)) 8px !important;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  }

  .sdb-bottom-nav::-webkit-scrollbar {
    display: none !important;
  }

  [data-theme="dark"] .sdb-bottom-nav,
  body.dark-mode .sdb-bottom-nav {
    background: var(--header-bg, rgba(9, 9, 11, 0.95)) !important;
    border-top-color: var(--border-subtle, #27272a) !important;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
  }

  .sdb-bottom-nav-item {
    flex: 0 0 auto !important;
    min-width: 72px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 3px !important;
    color: var(--text-secondary, #71717a) !important;
    text-decoration: none !important;
    font-size: 0.65rem !important;
    font-weight: 500 !important;
    letter-spacing: -0.01em !important;
    text-align: center !important;
    transition: color 0.15s ease !important;
    -webkit-tap-highlight-color: transparent !important;
    padding: 4px 6px !important;
  }

  .sdb-bottom-nav-item svg {
    width: 20px;
    height: 20px;
    stroke-width: 1.8;
  }

  .sdb-bottom-nav-item:active {
    transform: scale(0.92);
  }

  /* YouTube-Style Active Highlight */
  .sdb-bottom-nav-item.active {
    color: var(--accent, #166534) !important;
    font-weight: 700;
  }

  .sdb-bottom-nav-item.active svg {
    stroke: var(--accent, #166534) !important;
    stroke-width: 2.2;
  }

  [data-theme="dark"] .sdb-bottom-nav-item.active,
  body.dark-mode .sdb-bottom-nav-item.active {
    color: var(--accent, #22c55e) !important;
  }

  [data-theme="dark"] .sdb-bottom-nav-item.active svg,
  body.dark-mode .sdb-bottom-nav-item.active svg {
    stroke: var(--accent, #22c55e) !important;
  }
}