/* Reset and Variables */
:root {
  --bg-body: #ffffff;
  --bg-sidebar: #f8f9fa;
  --bg-input: #ffffff;
  --text-main: #1a1a1a;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --accent-color: #000000;
  --accent-hover: #333333;
  --accent-ring: rgba(0, 0, 0, 0.2);
  --spacing-unit: 1rem;
  --sidebar-width: 260px;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  --btn-text-color: #ffffff;
  --bg-topbar: rgba(255, 255, 255, 0.9);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  height: 100vh;
  overflow: hidden;
  /* App-like feel */
}

/* Layout */
.app-layout {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: transform 0.3s ease;
  z-index: 100;
  transform: translateX(0);
  /* Visible by default on desktop */
}

.logo {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

.icon-logo {
  width: 24px;
  height: 24px;
}

.nav-menu {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0;
}

/* Navigation Items */
.nav-category {
  margin-bottom: 0.5rem;
}

.nav-category-header {
  padding: 0.75rem 1.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-category-header .icon {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

.nav-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.6rem 1.5rem 0.6rem 2.5rem;
  /* Indented */
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.nav-item:hover {
  background-color: rgba(0, 0, 0, 0.05);
  padding-left: 2.75rem;
  /* Subtle shift */
}

.nav-item.active {
  background-color: var(--border-color);
  font-weight: 600;
  border-right: 3px solid var(--accent-color);
}

/* Main Content */
.content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  background-color: var(--bg-body);
}

.top-bar {
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background-color: var(--bg-topbar);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

#page-title {
  font-size: 1.25rem;
  font-weight: 600;
}

#mobile-menu-btn {
  display: none;
  /* Hidden on desktop */
  background: white;
  border: none;
  cursor: grab;
  padding: 0.75rem;
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 1000;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  touch-action: none;
  /* Prevent scrolling while dragging */
}

#mobile-menu-btn:active {
  cursor: grabbing;
}

#mobile-menu-btn .icon {
  width: 24px;
  height: 24px;
}

/* Calculator Display Area */
#calculator-display {
  padding: 2rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Calculator Grid Layout */
.calculator-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  /* 2 Columns: Input | Result */
  gap: 2rem;
  align-items: start;
}

.calculator-inputs {
  background: var(--bg-sidebar);
  /* Subtle background for inputs */
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.calculator-results {
  background: var(--text-main);
  /* Dark background for results */
  color: var(--btn-text-color);
  padding: 2rem;
  border-radius: var(--radius);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow);
}

.calculator-results h3 {
  color: #fff;
  opacity: 0.8;
  font-size: 0.9rem;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.result-content {
  font-size: 1.5rem;
  font-weight: 300;
  word-break: break-word;
}

.result-content strong {
  font-weight: 600;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-input);
  color: var(--text-main);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

button.calculate-btn {
  width: 100%;
  padding: 1rem;
  background-color: var(--accent-color);
  color: var(--btn-text-color);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s, box-shadow 0.2s;
  margin-top: 1rem;
}

button.calculate-btn:hover {
  background-color: var(--accent-hover);
}

button.calculate-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

/* Generic button base */
.btn {
  width: 100%;
  padding: 1rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s, opacity 0.2s, box-shadow 0.2s;
  margin-top: 1rem;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.btn-secondary {
  background-color: var(--bg-secondary, #f0f0f0);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-color);
}

/* Info/Description Text */
.calculator-description {
  grid-column: 1 / -1;
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Welcome Screen */
.welcome-screen {
  text-align: center;
  color: var(--text-secondary);
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.welcome-screen h2 {
  color: var(--text-main);
  margin-bottom: 1rem;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.calculator-wrapper {
  animation: fadeIn 0.4s ease-out;
}

/* Responsive */
@media (max-width: 900px) {
  .calculator-wrapper {
    grid-template-columns: 1fr;
    /* Stack on smaller screens */
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    /* Hidden by default on mobile */
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
  }

  .sidebar.active {
    transform: translateX(0);
    /* Slide in */
  }

  #mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Utility to hide elements */
.hidden {
  display: none !important;
}

/* Custom Radio Buttons */
.formula-radio-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.75rem;
}

.formula-radio-group .custom-radio-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 1rem;
  position: relative;
  -webkit-user-select: none;
  user-select: none;
  font-weight: normal;
}

/* Hide default radio */
.custom-radio-label input[type="radio"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

/* Custom indicator */
.radio-mark {
  height: 20px;
  width: 20px;
  background-color: transparent;
  border: 2px solid var(--accent-color);
  border-radius: 50%;
  margin-right: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

/* Inner dot */
.radio-mark::after {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--accent-color);
  opacity: 0;
  transform: scale(0);
  transition: all 0.2s ease;
}

/* Checked state */
.custom-radio-label input:checked~.radio-mark::after {
  opacity: 1;
  transform: scale(1);
}

/* Focus state */
.custom-radio-label input:focus~.radio-mark {
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.radio-text {
  color: var(--text-main);
  font-size: 1.05rem;
}

/* What is this? Button */
.what-is-this-btn {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--btn-text-color);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  /* Round pill shape */
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}

.what-is-this-btn:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.what-is-this-btn:active {
  transform: translateY(1px);
}

/* Search Bar */
.search-container {
  flex: 1;
  display: flex;
  justify-content: center;
}

.search-wrapper {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.search-wrapper input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  border: 1px solid var(--border-color);
  border-radius: 24px;
  font-size: 0.95rem;
  background-color: var(--bg-body);
  color: var(--text-main);
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.search-wrapper input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-ring), 0 4px 12px rgba(0, 0, 0, 0.1);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  opacity: 0.5;
  pointer-events: none;
}

/* Network Status Badge */
.network-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.network-status .status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  transition: background 0.3s ease;
}

.network-status.online {
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.network-status.online .status-dot {
  background: #22c55e;
  box-shadow: 0 0 6px rgba(34, 197, 94, 0.5);
}

.network-status.offline {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.network-status.offline .status-dot {
  background: #ef4444;
  box-shadow: 0 0 6px rgba(239, 68, 68, 0.5);
}

/* ============================
   Converter-Specific Styles
   ============================ */

/* Layout: From | Swap | To */
.converter-layout {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--bg-sidebar);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.converter-panel {
  flex: 1;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.converter-panel .form-group {
  margin-bottom: 0;
}

.converter-panel-header {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.converter-from {
  background: var(--bg-input);
}

.converter-to {
  background: #1a1a1a;
  color: #fff;
}

.converter-to input,
.converter-to select {
  background: #2a2a2a !important;
  color: #fff !important;
  border-color: #444 !important;
}

.converter-to input::placeholder {
  color: #888;
}

.converter-to .converter-panel-header {
  color: #aaa;
}

/* Swap Button */
.converter-swap-section {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--border-color);
  padding: 0 0.25rem;
}

.converter-swap-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: var(--bg-input);
  color: var(--text-main);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.converter-swap-btn:hover {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
  transform: scale(1.1);
}

.converter-swap-btn.rotating {
  animation: swapRotate 0.3s ease;
}

@keyframes swapRotate {
  0% {
    transform: rotate(0deg) scale(1.1);
  }

  100% {
    transform: rotate(180deg) scale(1);
  }
}

/* Final Result Display */
.converter-final-result {
  margin-top: 1.5rem;
  text-align: center;
}

.converter-result-equation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  border-radius: var(--radius);
  color: #fff;
  font-size: 1.15rem;
}

.converter-result-from {
  font-weight: 500;
  color: #ccc;
}

.converter-result-equals {
  font-weight: 300;
  color: #888;
  font-size: 1.3rem;
}

.converter-result-to {
  font-weight: 700;
  color: #fff;
  font-size: 1.35rem;
}

/* All Conversions Grid */
.converter-all-results {
  margin-top: 1.25rem;
}

.converter-grid-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.converter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.5rem;
}

.converter-grid-item {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 1rem;
  background: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  transition: all 0.2s ease;
}

.converter-grid-item:hover {
  border-color: var(--accent-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.converter-grid-item.active {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

.converter-grid-item.active .converter-grid-unit {
  color: rgba(255, 255, 255, 0.8);
}

.converter-grid-value {
  font-weight: 600;
  font-size: 0.95rem;
  word-break: break-all;
}

.converter-grid-unit {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}

/* Responsive Converter */
@media (max-width: 600px) {
  .converter-layout {
    flex-direction: column;
  }

  .converter-swap-section {
    padding: 0.5rem;
    flex-direction: row;
  }

  .converter-grid {
    grid-template-columns: 1fr;
  }

  .converter-result-equation {
    font-size: 1rem;
    padding: 0.75rem 1rem;
  }
}

/* Other Calculators - Planetary Age */
.planet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.planet-card {
  background: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.planet-card:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.planet-name {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.planet-age {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
}

.planet-unit {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-body: #121212;
  --bg-sidebar: #1e1e1e;
  --bg-input: #2d2d2d;
  --text-main: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: #404040;
  --accent-color: #ffffff;
  --accent-hover: #cccccc;
  --accent-ring: rgba(255, 255, 255, 0.25);
  --btn-text-color: #000000;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --bg-topbar: rgba(18, 18, 18, 0.9);
}

/* Keep results panel always dark in dark themes */
[data-theme="dark"] .calculator-results {
  background: #1a1a1a;
  color: #ffffff;
}

[data-theme="dark"] .calculator-results h3 {
  color: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .calculator-results .what-is-this-btn {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.3);
}

[data-theme="dark"][data-variant="enhanced"] .calculator-results {
  background: #000000;
}

[data-theme="dark"][data-variant="gentle"] .calculator-results {
  background: #222222;
}

/* Settings Button */
.settings-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.settings-btn:hover {
  background-color: rgba(128, 128, 128, 0.1);
}

.settings-btn .icon {
  width: 20px;
  height: 20px;
}

/* Theme Toggle Button */
.theme-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
  margin-right: 1rem;
}

.theme-toggle:hover {
  background-color: rgba(128, 128, 128, 0.1);
}

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

/* ============================
   Settings Modal
   ============================ */

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.modal.active {
  display: flex;
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background-color: var(--bg-sidebar);
  padding: 1.5rem;
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transform: translateY(20px);
  transition: transform 0.3s ease;
  border: 1px solid var(--border-color);
}

.modal.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0 0.5rem;
  transition: color 0.2s;
}

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

/* Theme Selection */
.theme-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.theme-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  padding: 0.75rem;
  border: 2px solid transparent;
  border-radius: 12px;
  transition: all 0.2s ease;
  background-color: var(--bg-input);
}

.theme-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.theme-card.active {
  border-color: var(--accent-color);
  background-color: var(--accent-ring);
}

.theme-preview {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: 8px;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.theme-label {
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-main);
}

/* Theme Variants */

/* Enhanced (OLED Black) */
[data-theme="dark"][data-variant="enhanced"] {
  --bg-body: #000000;
  --bg-sidebar: #050505;
  --bg-input: #121212;
  --border-color: #222222;
  --text-main: #ffffff;
  --text-secondary: #888888;
  --accent-ring: rgba(255, 255, 255, 0.2);
  --shadow: 0 4px 12px rgba(255, 255, 255, 0.05);
  --bg-topbar: rgba(0, 0, 0, 0.95);
}

/* Medium (Standard Dark) - explicitly matching the default dark theme */
[data-theme="dark"][data-variant="medium"] {
  --bg-body: #121212;
  --bg-sidebar: #1e1e1e;
  --bg-input: #2d2d2d;
  --border-color: #404040;
  --text-main: #e0e0e0;
}

/* Gentle (Soft Gray) */
[data-theme="dark"][data-variant="gentle"] {
  --bg-body: #252525;
  --bg-sidebar: #2d2d2d;
  --bg-input: #383838;
  --border-color: #484848;
  --text-main: #d0d0d0;
  --text-secondary: #999999;
  --accent-ring: rgba(255, 255, 255, 0.2);
  --bg-topbar: rgba(37, 37, 37, 0.9);
}

/* ===== Password Generator ===== */

.pw-display {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  margin-bottom: 1rem;
  min-height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.pw-output {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  word-break: break-all;
  color: var(--text-main);
  transition: opacity 0.2s;
}

/* Scramble animation — subtle glow pulse */
.pw-scrambling {
  animation: pw-scramble-pulse 0.08s infinite alternate;
  color: var(--accent-color);
}

@keyframes pw-scramble-pulse {
  0% {
    opacity: 0.7;
  }

  100% {
    opacity: 1;
  }
}

/* Reveal flash */
.pw-reveal {
  animation: pw-flash 0.4s ease-out;
}

@keyframes pw-flash {
  0% {
    background: var(--accent-color);
    color: var(--btn-text-color);
  }

  100% {
    background: transparent;
    color: var(--text-main);
  }
}

/* Strength section */
.pw-strength-section {
  margin-bottom: 0.5rem;
}

.pw-strength-bar-track {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 999px;
  overflow: hidden;
}

.pw-strength-bar {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  transition: width 0.5s ease, background 0.4s ease;
}

.pw-strength-label {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

/* Slider */
.pw-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: 999px;
  outline: none;
  margin-top: 0.5rem;
  transition: background 0.3s;
}

.pw-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  border: 2px solid var(--bg-body);
  box-shadow: 0 0 0 2px var(--accent-color);
  transition: transform 0.15s;
}

.pw-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.pw-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  border: 2px solid var(--bg-body);
  box-shadow: 0 0 0 2px var(--accent-color);
}

/* Checkbox options */
.pw-options {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.pw-checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  color: var(--text-main);
}

.pw-checkbox-label input[type="checkbox"] {
  display: none;
}

.pw-check-mark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, border-color 0.2s;
  position: relative;
}

.pw-checkbox-label input[type="checkbox"]:checked+.pw-check-mark {
  background: var(--accent-color);
  border-color: var(--accent-color);
}

.pw-checkbox-label input[type="checkbox"]:checked+.pw-check-mark::after {
  content: '';
  width: 6px;
  height: 10px;
  border: solid var(--btn-text-color);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
  margin-top: -2px;
}

/* ============================
   Consistent Component Styles
   ============================ */

/* Bullet Points / Lists */
.calculator-inputs ul,
.calculator-results ul,
.calculator-description ul,
.result-content ul {
  list-style: none;
  padding-left: 0;
  margin: 0.5rem 0;
}

.calculator-inputs ul li,
.calculator-results ul li,
.calculator-description ul li,
.result-content ul li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.4rem;
  line-height: 1.6;
}

.calculator-inputs ul li::before,
.calculator-description ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-color);
}

.calculator-results ul li::before,
.result-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--btn-text-color);
  opacity: 0.6;
}

.calculator-inputs ol,
.calculator-results ol,
.calculator-description ol,
.result-content ol {
  padding-left: 1.5rem;
  margin: 0.5rem 0;
}

.calculator-inputs ol li,
.calculator-results ol li,
.calculator-description ol li,
.result-content ol li {
  margin-bottom: 0.4rem;
  line-height: 1.6;
}

/* General Slider / Range Input */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: 999px;
  outline: none;
  transition: background 0.3s;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  border: 2px solid var(--bg-body);
  box-shadow: 0 0 0 2px var(--accent-color);
  transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  border: 2px solid var(--bg-body);
  box-shadow: 0 0 0 2px var(--accent-color);
}

input[type="range"]:focus-visible {
  outline: none;
}

input[type="range"]:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 2px var(--accent-color), 0 0 0 5px var(--accent-ring);
}

/* Color Input */
input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 48px;
  height: 48px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
  cursor: pointer;
  background-color: var(--bg-input);
  transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="color"]:hover {
  border-color: var(--accent-color);
}

input[type="color"]:focus-visible {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 2px;
}

input[type="color"]::-moz-color-swatch {
  border: none;
  border-radius: 2px;
}

/* General Checkbox (outside password generator) */
.form-group input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-input);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, border-color 0.2s;
  position: relative;
}

.form-group input[type="checkbox"]:checked {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}

.form-group input[type="checkbox"]:checked::after {
  content: '';
  width: 6px;
  height: 10px;
  border: solid var(--btn-text-color);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
  margin-top: -2px;
}

.form-group input[type="checkbox"]:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

/* MathJax / LaTeX Theming */
[data-theme="dark"] mjx-container svg {
  color: var(--text-main) !important;
}

[data-theme="dark"] .calculator-results mjx-container svg {
  color: #fff !important;
}

/* Consistent focus-visible for all interactive elements */
.nav-item:focus-visible,
.what-is-this-btn:focus-visible,
.converter-swap-btn:focus-visible,
.settings-btn:focus-visible,
.theme-toggle:focus-visible,
.modal-close:focus-visible,
.theme-card:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}