:root {
  /* Modern Color Palette */
  --primary: #6366f1;               /* Indigo */
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #10b981;             /* Emerald */
  --secondary-light: #34d399;
  --secondary-dark: #059669;
  --accent: #f59e0b;                /* Amber */
  --accent-light: #fbbf24;
  --accent-dark: #d97706;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  
  /* Background Colors - Dark Theme Default */
  --background: #0f172a;            /* Slate 900 */
  --background-light: #1e293b;      /* Slate 800 */
  --surface: #1e293b;               /* Slate 800 */
  --surface-light: #334155;         /* Slate 700 */
  
  /* Glass UI Colors */
  --glass-bg: rgba(30, 41, 59, 0.6);
  --glass-border: rgba(255, 255, 255, 0.1);
  
  /* Text Colors */
  --text-primary: #f8fafc;          /* Slate 50 */
  --text-secondary: #cbd5e1;        /* Slate 300 */
  --text-tertiary: #94a3b8;         /* Slate 400 */
  --text-disabled: #64748b;         /* Slate 500 */
  
  /* Border Colors */
  --border: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.2);
  
  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  
  /* Animation */
  --transition-quick: 150ms;
  --transition-normal: 250ms;
  --transition-slow: 350ms;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Theme transition */
  --theme-transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Light Mode Theme */
.light-mode {
  /* Core colors */
  --background: #f8fafc;            /* Slate 50 */
  --background-light: #f1f5f9;      /* Slate 100 */
  --surface: #ffffff;               /* White */
  --surface-light: #e2e8f0;         /* Slate 200 */
  
  /* Glass UI Colors */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(0, 0, 0, 0.1);
  
  /* Text Colors */
  --text-primary: #0f172a;          /* Slate 900 */
  --text-secondary: #334155;        /* Slate 700 */
  --text-tertiary: #64748b;         /* Slate 500 */
  --text-disabled: #94a3b8;         /* Slate 400 */
  
  /* Border Colors */
  --border: rgba(0, 0, 0, 0.1);
  --border-hover: rgba(0, 0, 0, 0.2);
  
  /* Shadow adjustments for light mode */
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.04), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.03);
}

/* Light Mode Element-Specific Styles */
/* Typography */
.light-mode .quizgen-title {
  color: #4338ca; /* Slightly darker indigo */
}

.light-mode .quizgen-subtitle {
  color: #1e293b; /* Slate 800 */
}

.light-mode .quizgen-text {
  color: #475569; /* Slate 600 */
}

/* Ensure modal headings are dark in light mode */
.light-mode .quizgen-glass-card h2.text-2xl.font-bold,
.light-mode .quizgen-glass-card h3.text-xl.font-bold {
  color: var(--text-primary); /* Use the primary text color (dark) in light mode */
}

/* Navigation */
.light-mode .quizgen-navbar {
  background-color: rgba(255, 255, 255, 0.9);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid #e2e8f0;
}

.light-mode .quizgen-nav-link {
  color: #64748b; /* Slate 500 */
}

.light-mode .quizgen-nav-link:hover {
  color: #334155; /* Slate 700 */
}

.light-mode .quizgen-nav-link.active {
  color: #4f46e5; /* Indigo 600 */
}

/* Buttons */
.light-mode .quizgen-btn-ghost {
  color: #334155; /* Slate 700 */
  border-color: #e2e8f0; /* Slate 200 */
}

.light-mode .quizgen-btn-ghost:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.light-mode .quizgen-btn-outline {
  border-color: #e2e8f0; /* Slate 200 */
  color: #334155; /* Slate 700 */
}

.light-mode .quizgen-btn-outline:hover {
  border-color: #6366f1; /* Indigo 500 */
  color: #4f46e5; /* Indigo 600 */
}

/* Cards */
.light-mode .quizgen-glass-card {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.light-mode .quizgen-card {
  background-color: white;
  border: 1px solid #e2e8f0; /* Slate 200 */
}

.light-mode .quizgen-plan-card {
  background-color: white;
  border: 2px solid #e2e8f0; /* Slate 200 */
}

.light-mode .quizgen-plan-card.selected {
  background-color: rgba(79, 70, 229, 0.05); /* Light indigo background */
}

.light-mode .quizgen-plan-card.current {
  background-color: rgba(16, 185, 129, 0.05); /* Light emerald background */
}

/* Inputs */
.light-mode .quizgen-input,
.light-mode .quizgen-form-input,
.light-mode input[type="text"],
.light-mode input[type="email"],
.light-mode input[type="password"],
.light-mode input[type="number"],
.light-mode input[type="url"],
.light-mode input[type="tel"],
.light-mode textarea {
  background-color: #fff;
  border: 1px solid #cbd5e1; /* Slate 300 */
  color: #0f172a; /* Slate 900 */
  box-shadow: var(--shadow-inner);
}

.light-mode .quizgen-input:focus,
.light-mode .quizgen-form-input:focus,
.light-mode input[type="text"]:focus,
.light-mode input[type="email"]:focus,
.light-mode input[type="password"]:focus,
.light-mode input[type="number"]:focus,
.light-mode input[type="url"]:focus,
.light-mode input[type="tel"]:focus,
.light-mode textarea:focus {
  border-color: #6366f1; /* Indigo 500 */
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2), var(--shadow-inner);
}

.light-mode .quizgen-input::placeholder,
.light-mode .quizgen-form-input::placeholder,
.light-mode input::placeholder,
.light-mode textarea::placeholder {
  color: #94a3b8; /* Slate 400 */
}

/* Form Labels */
.light-mode .quizgen-form-label,
.light-mode label {
  color: #334155; /* Slate 700 */
}

/* Radio Buttons and Checkboxes */
.light-mode input[type="radio"],
.light-mode input[type="checkbox"] {
  background-color: #fff;
  border: 2px solid #cbd5e1; /* Slate 300 */
}

.light-mode input[type="range"] {
  background-color: #e2e8f0; /* Slate 200 */
}

/* Selects */
.light-mode select,
.light-mode .quizgen-select,
.light-mode select.quizgen-form-input {
  background-color: #fff;
  border: 1px solid #cbd5e1; /* Slate 300 */
  color: #0f172a; /* Slate 900 */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
}

/* Modals */
.light-mode .quizgen-modal-container {
  background-color: white;
  border: 1px solid #e2e8f0; /* Slate 200 */
}

.light-mode .quizgen-modal-header {
  border-bottom: 1px solid #e2e8f0; /* Slate 200 */
}

.light-mode .quizgen-modal-footer {
  border-top: 1px solid #e2e8f0; /* Slate 200 */
}

/* Notifications */
.light-mode .quizgen-notification {
  background-color: white;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Tables */
.light-mode .quizgen-table {
  border-color: #e2e8f0; /* Slate 200 */
}

.light-mode .quizgen-table th {
  background-color: #f8fafc; /* Slate 50 */
  color: #334155; /* Slate 700 */
}

.light-mode .quizgen-table td {
  border-color: #e2e8f0; /* Slate 200 */
}

.light-mode .quizgen-table tr:hover {
  background-color: #f1f5f9; /* Slate 100 */
}

/* Alerts */
.light-mode .quizgen-alert {
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.light-mode .quizgen-alert-info {
  background-color: rgba(59, 130, 246, 0.1);
  border-left-color: #3b82f6; /* Blue 500 */
}

.light-mode .quizgen-alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border-left-color: #10b981; /* Emerald 500 */
}

.light-mode .quizgen-alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-left-color: #f59e0b; /* Amber 500 */
}

.light-mode .quizgen-alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  border-left-color: #ef4444; /* Red 500 */
}

/* Theme Toggle Button */
.light-mode .theme-toggle {
  background: #e2e8f0; /* Slate 200 */
}

.light-mode .theme-toggle:hover {
  background: #cbd5e1; /* Slate 300 */
}

/* Dropdowns */
.light-mode .quizgen-dropdown-content {
  background-color: white;
  border: 1px solid #e2e8f0; /* Slate 200 */
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Tabs */
.light-mode .quizgen-tab {
  color: #64748b; /* Slate 500 */
}

.light-mode .quizgen-tab:hover {
  color: #334155; /* Slate 700 */
}

.light-mode .quizgen-tab.active {
  color: #4f46e5; /* Indigo 600 */
  border-bottom-color: #4f46e5; /* Indigo 600 */
}

/* Code blocks and syntax highlighting */
.light-mode pre, 
.light-mode code {
  background-color: #f1f5f9; /* Slate 100 */
  color: #334155; /* Slate 700 */
  border: 1px solid #e2e8f0; /* Slate 200 */
}

/* Tooltips */
.light-mode .quizgen-tooltip-text {
  background-color: white;
  border: 1px solid #e2e8f0; /* Slate 200 */
  color: #0f172a; /* Slate 900 */
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Base Styles */
html, body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: var(--theme-transition);
}

/* Theme toggle button */
.theme-toggle {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--surface-light);
  transition: var(--theme-transition);
}

.theme-toggle:hover {
  background: var(--surface);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--text-primary);
  transition: var(--theme-transition);
}

/* Layout */
.quizgen-container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
  overflow-x: hidden;
}

@media (min-width: 640px) {
  .quizgen-container {
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }
}

/* Backgrounds */
.quizgen-gradient-bg {
  background: linear-gradient(135deg, var(--background), var(--background-light));
  min-height: 100vh;
}

.quizgen-surface {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.quizgen-surface:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.quizgen-glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.quizgen-glass-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

/* Buttons */
.quizgen-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  padding: var(--spacing-2) var(--spacing-4);
  font-weight: 500;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.quizgen-btn:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

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

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

.quizgen-btn-secondary {
  background-color: var(--secondary);
  color: white;
}

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

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

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

.quizgen-btn-ghost {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.quizgen-btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.quizgen-btn-gradient {
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  color: white;
  border-radius: var(--radius);
}

.quizgen-btn-gradient:hover {
  background: linear-gradient(90deg, var(--primary-dark), var(--primary));
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Card Styles */
.quizgen-card {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.quizgen-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Plan Card Styles */
.quizgen-plan-card {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  padding: var(--spacing-6);
  transition: all var(--transition-normal);
  word-break: break-word;
  overflow-wrap: break-word;
  max-width: 100%;
  position: relative;
}

.quizgen-plan-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.quizgen-plan-card.selected {
  border-color: var(--primary);
  background-color: rgba(99, 102, 241, 0.1);
}

.quizgen-plan-card.current {
  border-color: var(--secondary);
  background-color: rgba(16, 185, 129, 0.1);
}

/* Typography */
.quizgen-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.quizgen-subtitle {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.quizgen-text {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-3);
}

.quizgen-text-gradient {
  background: linear-gradient(90deg, var(--primary-light), var(--secondary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* Badges */
.quizgen-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.quizgen-badge-primary {
  background-color: var(--primary);
  color: white;
}

.quizgen-badge-secondary {
  background-color: var(--secondary);
  color: white;
}

.quizgen-badge-accent {
  background-color: var(--accent);
  color: white;
}

.quizgen-badge-ghost {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* Feature Badges */
.quizgen-feature-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-3);
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-full);
  font-weight: 500;
  color: white;
  margin-right: var(--spacing-2);
  margin-bottom: var(--spacing-2);
  transition: transform var(--transition-normal);
}

.quizgen-feature-badge:hover {
  transform: translateY(-1px);
}

/* Input Styles */
.quizgen-input,
.quizgen-form-input,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="url"],
input[type="tel"],
textarea {
  width: 100%;
  background-color: var(--background-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-inner);
  appearance: none;
}

.quizgen-input:focus,
.quizgen-form-input:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25), var(--shadow-inner);
}

.quizgen-input::placeholder,
.quizgen-form-input::placeholder,
input::placeholder,
textarea::placeholder {
  color: var(--text-tertiary);
  opacity: 0.7;
}

/* Form Labels */
.quizgen-form-label,
label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-weight: 500;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

/* Radio Buttons */
input[type="radio"] {
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--background-light);
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  margin-right: var(--spacing-2);
  position: relative;
  cursor: pointer;
  transition: all var(--transition-normal);
  vertical-align: middle;
}

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

input[type="radio"]:checked {
  border-color: var(--primary);
  background-color: var(--background-light);
}

input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  width: 0.625rem;
  height: 0.625rem;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--primary);
  border-radius: var(--radius-full);
  animation: quizRadioCheck 0.2s ease-in-out;
}

@keyframes quizRadioCheck {
  0% { transform: translate(-50%, -50%) scale(0); }
  100% { transform: translate(-50%, -50%) scale(1); }
}

/* Select Inputs */
select,
.quizgen-select,
select.quizgen-form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-3) center;
  background-size: 1rem;
  padding-right: var(--spacing-8);
  width: 100%;
  background-color: var(--background-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-normal);
  cursor: pointer;
}

select:focus,
.quizgen-select:focus,
select.quizgen-form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

/* Checkboxes */
input[type="checkbox"] {
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--background-light);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  margin-right: var(--spacing-2);
  position: relative;
  cursor: pointer;
  transition: all var(--transition-normal);
  vertical-align: middle;
}

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

input[type="checkbox"]:checked {
  border-color: var(--primary);
  background-color: var(--primary);
}

input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  width: 0.375rem;
  height: 0.75rem;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -65%) rotate(45deg);
  border-bottom: 2px solid white;
  border-right: 2px solid white;
  animation: quizCheckboxCheck 0.2s ease-in-out;
}

@keyframes quizCheckboxCheck {
  0% { opacity: 0; transform: translate(-50%, -65%) rotate(45deg) scale(0.5); }
  100% { opacity: 1; transform: translate(-50%, -65%) rotate(45deg) scale(1); }
}

/* Form Groups */
.quizgen-form-group {
  margin-bottom: var(--spacing-4);
}

/* Textarea */
textarea.quizgen-form-input {
  min-height: 100px;
  resize: vertical;
}

/* File Input */
input[type="file"] {
  width: 100%;
  background-color: var(--background-light);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-4);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-align: center;
}

input[type="file"]:hover {
  border-color: var(--primary-light);
  background-color: rgba(99, 102, 241, 0.05);
}

/* Range Input */
input[type="range"] {
  appearance: none;
  width: 100%;
  height: 6px;
  background-color: var(--background-light);
  border-radius: var(--radius-full);
  margin: var(--spacing-2) 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  background-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

/* Input with Icon */
.quizgen-input-with-icon {
  position: relative;
}

.quizgen-input-with-icon input {
  padding-left: var(--spacing-10);
}

.quizgen-input-with-icon svg {
  position: absolute;
  left: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  width: 1.25rem;
  height: 1.25rem;
  color: var(--text-tertiary);
}

/* Error State */
.quizgen-input.error,
.quizgen-form-input.error,
input.error,
select.error,
textarea.error {
  border-color: var(--danger);
}

.quizgen-input.error:focus,
.quizgen-form-input.error:focus,
input.error:focus,
select.error:focus,
textarea.error:focus {
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.25);
}

.quizgen-form-error {
  color: var(--danger);
  font-size: var(--text-sm);
  margin-top: var(--spacing-1);
}

/* Navigation */
.quizgen-navbar {
  background-color: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-4) 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.quizgen-nav-link {
  color: var(--text-secondary);
  position: relative;
  padding: var(--spacing-2) var(--spacing-3);
  transition: all var(--transition-normal);
}

.quizgen-nav-link:hover {
  color: var(--text-primary);
}

.quizgen-nav-link.active {
  color: var(--primary-light);
}

.quizgen-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-3);
  right: var(--spacing-3);
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-full);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(99, 102, 241, 0); }
  100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

.quizgen-animate-fade {
  animation: fadeIn var(--transition-normal) ease forwards;
}

.quizgen-animate-slide {
  animation: slideUp var(--transition-normal) ease forwards;
}

.quizgen-animate-pulse {
  animation: pulse 2s infinite;
}

/* Utilities */
.quizgen-shadow-hover {
  transition: box-shadow var(--transition-normal);
}

.quizgen-shadow-hover:hover {
  box-shadow: var(--shadow-lg);
}

.quizgen-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Loader Animation */
.quizgen-loader {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Notifications */
.quizgen-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: var(--spacing-4);
  border-radius: var(--radius);
  background-color: var(--surface);
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 100;
}

.quizgen-notification.show {
  transform: translateX(0);
  opacity: 1;
}

/* Tooltip */
.quizgen-tooltip {
  position: relative;
  display: inline-block;
}

.quizgen-tooltip-text {
  visibility: hidden;
  background-color: var(--surface);
  color: var(--text-primary);
  text-align: center;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius);
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  white-space: nowrap;
  box-shadow: var(--shadow);
  font-size: var(--text-sm);
}

.quizgen-tooltip:hover .quizgen-tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* Specific Components */
.quizgen-logo {
  font-weight: 700;
  font-size: var(--text-2xl);
  background: linear-gradient(90deg, var(--primary-light), var(--secondary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
}

.quizgen-stats-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-6);
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: all var(--transition-normal);
}

.quizgen-stats-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.quizgen-stats-value {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--primary-light);
  margin-bottom: var(--spacing-2);
}

.quizgen-stats-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Custom Quiz Card */
.quizgen-quiz-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.quizgen-quiz-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.quizgen-quiz-card-header {
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--border);
}

.quizgen-quiz-card-body {
  padding: var(--spacing-4);
}

.quizgen-quiz-card-footer {
  padding: var(--spacing-4);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.quizgen-quiz-options {
  position: relative;
  z-index: 5;
}

.quizgen-quiz-options button:focus + div,
.quizgen-quiz-options button:active + div {
  display: block;
}

/* Dropdown Styles */
.quizgen-dropdown-toggle {
  position: relative;
  cursor: pointer;
}

.quizgen-dropdown-toggle + div {
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 0.5rem;
  z-index: 50;
  min-width: 12rem;
  max-height: none !important;
  overflow: visible !important;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

/* Mobile Menu Button */
#mobile-menu-button {
  display: block;
}

@media (min-width: 768px) {
  #mobile-menu-button {
    display: none;
  }
}

/* Navbar */
.quizgen-navbar {
  background-color: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-4) 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.quizgen-nav-link {
  color: var(--text-secondary);
  position: relative;
  padding: var(--spacing-2) var(--spacing-3);
  transition: all var(--transition-normal);
}

.quizgen-nav-link:hover {
  color: var(--text-primary);
}

.quizgen-nav-link.active {
  color: var(--primary-light);
}

.quizgen-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-3);
  right: var(--spacing-3);
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-full);
}

/* Dropdown styles */
.quizgen-dropdown-content {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-2) 0;
  min-width: 12rem;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  z-index: 1000;
}

.quizgen-dropdown-content a {
  display: block;
  padding: var(--spacing-2) var(--spacing-4);
  color: var(--text-primary);
  text-decoration: none;
  transition: background-color var(--transition-quick);
}

.quizgen-dropdown-content a:hover {
  background-color: var(--surface-light);
}

.dropdown-align-right {
  right: 0;
  left: auto;
}

/* Fix for nested dropdowns in mobile menu */
#mobile-menu .quizgen-dropdown-content {
  position: relative !important;
  top: auto !important;
  left: auto !important;
  right: auto !important;
  width: 100% !important;
  margin-top: var(--spacing-2);
  margin-bottom: var(--spacing-2);
}

/* Form input styling fixes - dark theme */
.quizgen-form-input, 
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="search"],
textarea,
select {
    color: var(--text-primary) !important;
    background-color: var(--background-light) !important;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-3);
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
}

.quizgen-form-input:focus, 
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="search"]:focus,
textarea:focus,
select:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Fix for transparent inputs */
.bg-surface\/30,
.bg-surface\/50 {
    background-color: var(--background-light) !important;
}

/* Placeholder text */
input::placeholder,
textarea::placeholder {
    color: var(--text-tertiary) !important;
    opacity: 0.7;
}

/* Fix for textareas specifically */
textarea.quizgen-form-input,
textarea {
    min-height: 120px;
    resize: vertical;
}

/* Improve radio and checkbox styling */
input[type="radio"],
input[type="checkbox"] {
    accent-color: var(--primary);
}

/* Fix select dropdown appearance */
select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23cbd5e1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

/* Form labels */
.quizgen-form-label {
    color: var(--text-secondary);
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: 500;
}

/* Matching question styles */
.quizgen-glass-card p-3 bg-green-50 {
    background-color: rgba(20, 83, 45, 0.2) !important;
    border-color: rgba(74, 222, 128, 0.3) !important;
}

.p-2.bg-green-100 {
    background-color: rgba(20, 83, 45, 0.3) !important;
    border-color: rgba(74, 222, 128, 0.4) !important;
    color: var(--text-primary) !important;
}

/* Match all form containers */
.ml-4 {
    margin-left: 1rem;
}

/* Ensure radio labels are properly styled */
label.flex.items-center.p-3 {
    transition: background-color 0.2s;
    border-radius: var(--radius);
}

label.flex.items-center.p-3:hover {
    background-color: var(--surface-light) !important;
}

label.flex.items-center.p-3.bg-primary\/10 {
    background-color: rgba(99, 102, 241, 0.2) !important;
}

/* Mobile specific fixes - should apply to all viewports */
@media (max-width: 768px) {
    /* No specific overrides needed as we're applying styles globally */
}

/* Mobile form entry fixes - more specific selectors to ensure they take precedence */
@media (max-width: 768px) {
    /* General form inputs */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="date"],
    textarea,
    select,
    .quizgen-form-input {
        background-color: var(--background-light) !important;
        color: var(--text-primary) !important;
        border: 1px solid var(--border) !important;
        padding: 10px !important;
        border-radius: var(--radius) !important;
    }
    
    /* Fix for select dropdown appearance on mobile */
    select {
        appearance: none !important;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23cbd5e1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") !important;
        background-repeat: no-repeat !important;
        background-position: right 10px center !important;
        padding-right: 30px !important;
    }
    
    /* Fix background and text colors for specific classes */
    .bg-surface\/30,
    .bg-surface\/50 {
        background-color: var(--background-light) !important;
    }
    
    /* Fix for text colors */
    .text-green-800,
    .text-green-700,
    .text-green-600,
    .text-blue-800,
    .text-blue-700,
    .text-blue-600 {
        color: var(--text-primary) !important;
    }
    
    /* Fix specifically for matching questions containers */
    .bg-green-50,
    .bg-green-100,
    .bg-blue-50,
    .bg-blue-100 {
        background-color: var(--background-light) !important;
        border-color: var(--border) !important;
    }
    
    /* Ensure text visibility in matching questions */
    .bg-green-100 *,
    .bg-green-50 * {
        color: var(--text-primary) !important;
    }
    
    /* Fix placeholders on mobile */
    ::placeholder {
        color: var(--text-tertiary) !important;
        opacity: 0.7 !important;
    }
    
    /* Ensure proper focus outline on mobile */
    input:focus,
    textarea:focus,
    select:focus {
        border-color: var(--primary) !important;
        box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.5) !important;
        outline: none !important;
    }
}

/* Fix for edit-quiz page specifically */
.edit-quiz-container input,
.edit-quiz-container textarea,
.edit-quiz-container select {
    background-color: var(--background-light) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border);
}

/* Fix for quiz page matching questions */
.p-2.bg-green-100,
.bg-green-50 {
    background-color: rgba(20, 83, 45, 0.3) !important;
    border-color: rgba(74, 222, 128, 0.3) !important;
}
.p-2.bg-green-100 *,
.bg-green-50 * {
    color: var(--text-primary) !important;
}

/* Fix for blue sections */
.bg-blue-50 {
    background-color: rgba(30, 58, 138, 0.3) !important;
    border-color: rgba(96, 165, 250, 0.3) !important;
}
.bg-blue-50 * {
    color: var(--text-primary) !important;
}

/* Dark mode override for AI Question Format Guide card */
:root:not(.light-mode) .mb-6.bg-gradient-to-r.from-blue-50.to-indigo-50 {
    background: linear-gradient(to right, rgba(30, 58, 138, 0.3), rgba(49, 46, 129, 0.3)) !important;
    border-color: rgba(96, 165, 250, 0.3) !important;
}

:root:not(.light-mode) .mb-6.bg-gradient-to-r.from-blue-50.to-indigo-50 p.text-blue-800,
:root:not(.light-mode) .mb-6.bg-gradient-to-r.from-blue-50.to-indigo-50 p.text-blue-700 {
    color: var(--text-primary) !important;
}

:root:not(.light-mode) .mb-6.bg-gradient-to-r.from-blue-50.to-indigo-50 svg {
    color: var(--primary-light) !important;
}

/* Ensure dropdown menus are above other content */
[id^="dropdown-"] {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 100;
  position: absolute !important;
  top: 100% !important;
  right: 0 !important;
  left: auto !important;
}

/* Fill in Blank Styles */
.fill-blank-question {
    position: relative;
    display: inline-block;
}

.fill-blank-input {
    display: inline-block;
    min-width: 120px;
    max-width: 300px;
    width: auto;
    padding: 0.25rem 0.5rem;
    margin: 0 0.25rem;
    border: none;
    border-bottom: 2px solid var(--primary);
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    transition: all var(--transition-normal);
}

.fill-blank-input:focus {
    outline: none;
    border-bottom-color: var(--primary-light);
    background-color: rgba(99, 102, 241, 0.2);
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.fill-blank-input::placeholder {
    color: var(--text-tertiary);
    opacity: 0.7;
}

/* Replace underscores with styled blank */
.question-text-fill-blank {
    position: relative;
}

.question-text-fill-blank span.___ {
    display: inline-block;
    min-width: 120px;
    height: 2px;
    background-color: var(--primary);
    vertical-align: middle;
    margin: 0 0.25rem;
}

/* Style for correct/incorrect states */
.fill-blank-input.correct {
    border-bottom-color: var(--success);
    background-color: rgba(16, 185, 129, 0.1);
}

.fill-blank-input.incorrect {
    border-bottom-color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
}

/* Mobile optimization */
@media (max-width: 768px) {
    .fill-blank-input {
        min-width: 100px;
        max-width: 200px;
        font-size: 0.9em;
    }
    
    .question-text-fill-blank span.___ {
        min-width: 80px;
    }
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
}

.footer-description {
    color: #d1d5db;
    line-height: 1.5;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #ffffff;
}

.quizgen-stats-card {
    background: rgba(17, 24, 39, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(75, 85, 99, 0.3);
    border-radius: 0.75rem;
    padding: 1.5rem;
    color: #ffffff;
}

.quizgen-stats-value {
    font-size: 2rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.quizgen-stats-label {
    color: #d1d5db;
    font-size: 0.875rem;
}

.quizgen-glass-card {
    background: rgba(17, 24, 39, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(75, 85, 99, 0.3);
    border-radius: 0.75rem;
    color: #ffffff;
}

.plan-card {
    background: rgba(17, 24, 39, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(75, 85, 99, 0.3);
    border-radius: 0.75rem;
    padding: 1.5rem;
    color: #ffffff;
}

.plan-name {
    color: #ffffff;
    font-weight: 600;
}

.plan-description {
    color: #d1d5db;
}

.plan-features {
    color: #d1d5db;
}

.plan-price {
    color: #ffffff;
    font-weight: 700;
}

/* Fix for gradient button in light mode */
.light-mode .quizgen-btn-gradient {
  color: #f8fafc; /* Slate 50 - better contrast with blue gradient */
  font-weight: 600;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2); /* Subtle text shadow for better readability */
}