/* ============================================================================
   Password Generator Styles
   Clean, modern design matching mkiv.dev aesthetic
   ============================================================================ */

/* ============================================================================
   CSS Variables (Color Scheme)
   ============================================================================ */
:root {
  /* Colors - Clean, minimal palette */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-tertiary: #adb5bd;
  
  /* Accent colors */
  --accent-primary: #0066cc;
  --accent-hover: #0052a3;
  --accent-light: #e6f2ff;
  
  /* Strength colors */
  --strength-weak: #dc3545;
  --strength-fair: #fd7e14;
  --strength-good: #ffc107;
  --strength-strong: #28a745;
  --strength-very-strong: #20c997;
  
  /* Borders and shadows */
  --border-color: #dee2e6;
  --border-radius: 8px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-tertiary: #6c757d;
    --border-color: #495057;
    --accent-light: #1a3a52;
  }
}

/* ============================================================================
   Base Styles
   ============================================================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-lg);
}

/* ============================================================================
   Container
   ============================================================================ */
.container {
  max-width: 700px;
  width: 100%;
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-lg) 0;
}

/* ============================================================================
   Header
   ============================================================================ */
.header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ============================================================================
   Mode Selector
   ============================================================================ */
.mode-selector {
  margin-bottom: var(--spacing-xl);
}

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

.select {
  width: 100%;
  padding: var(--spacing-md);
  font-size: 1rem;
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s ease;
}

.select:hover {
  border-color: var(--accent-primary);
}

.select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* ============================================================================
   Password Display
   ============================================================================ */
.password-section {
  margin-bottom: var(--spacing-xl);
}

.password-wrapper {
  margin-bottom: var(--spacing-md);
}

.password-display {
  width: 100%;
  padding: var(--spacing-lg);
  font-size: 1.1rem;
  font-family: var(--font-mono);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  text-align: center;
  transition: all 0.2s ease;
}

.password-display:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.password-display::placeholder {
  color: var(--text-tertiary);
  font-family: var(--font-family);
}

/* ============================================================================
   Strength Indicator
   ============================================================================ */
.strength-section {
  margin-top: var(--spacing-md);
}

.strength-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.strength-text {
  font-weight: 600;
  text-transform: capitalize;
}

.strength-bits {
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

.strength-bar-container {
  width: 100%;
  height: 8px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.strength-bar {
  height: 100%;
  transition: width 0.3s ease, background-color 0.3s ease;
  border-radius: 4px;
}

/* Strength bar colors */
.strength-bar.weak { background-color: var(--strength-weak); }
.strength-bar.fair { background-color: var(--strength-fair); }
.strength-bar.good { background-color: var(--strength-good); }
.strength-bar.strong { background-color: var(--strength-strong); }
.strength-bar.very-strong { background-color: var(--strength-very-strong); }

/* ============================================================================
   Action Buttons
   ============================================================================ */
.action-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 500;
  font-family: var(--font-family);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-icon {
  font-size: 1.2rem;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background-color: var(--bg-tertiary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-text {
  background: none;
  border: none;
  color: var(--accent-primary);
  font-size: 0.9rem;
  font-family: var(--font-family);
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: opacity 0.2s ease;
}

.btn-text:hover {
  opacity: 0.8;
}

/* ============================================================================
   Controls Panel
   ============================================================================ */
.controls-panel {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.controls-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.control-value {
  font-weight: 600;
  color: var(--accent-primary);
}

/* ============================================================================
   Range Slider
   ============================================================================ */
.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  outline: none;
  transition: background 0.2s ease;
}

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

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.slider::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 0 4px var(--accent-light);
}

/* ============================================================================
   iOS-Style Toggle Switch
   ============================================================================ */
.toggle-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.toggle-switch {
  position: relative;
  width: 48px;
  height: 28px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  transition: 0.3s;
  border-radius: 28px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(20px);
}

.toggle-switch input:focus + .toggle-slider {
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* ============================================================================
   History Panel
   ============================================================================ */
.history-panel {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.history-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 300px;
  overflow-y: auto;
}

.history-empty {
  text-align: center;
  color: var(--text-tertiary);
  padding: var(--spacing-lg);
  font-size: 0.9rem;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
  cursor: pointer;
}

.history-item:hover {
  border-color: var(--accent-primary);
  transform: translateX(2px);
}

.history-item-left {
  flex: 1;
  min-width: 0;
}

.history-password {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: var(--spacing-xs);
}

.history-meta {
  display: flex;
  gap: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.history-mode {
  text-transform: capitalize;
}

.history-strength {
  text-transform: capitalize;
}

.history-time {
  margin-left: auto;
}

/* ============================================================================
   Footer
   ============================================================================ */
.footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.footer-link {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s ease;
}

.footer-link:hover {
  opacity: 0.8;
}

/* ============================================================================
   Toast Notification
   ============================================================================ */
.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--text-primary);
  color: var(--bg-primary);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============================================================================
   Responsive Design
   ============================================================================ */
@media (max-width: 768px) {
  body {
    padding: var(--spacing-md);
  }
  
  .container {
    padding: var(--spacing-lg);
  }
  
  .title {
    font-size: 1.5rem;
  }
  
  .action-buttons {
    grid-template-columns: 1fr;
  }
  
  .history-meta {
    flex-wrap: wrap;
  }
}

/* ============================================================================
   Scrollbar Styling
   ============================================================================ */
.history-list::-webkit-scrollbar {
  width: 8px;
}

.history-list::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

.history-list::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.history-list::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ============================================================================
   Animations
   ============================================================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.history-item {
  animation: fadeIn 0.3s ease;
}