/* VerbFlow Application Styles */

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #10b981;
  --accent-color: #f59e0b;
  --danger-color: #ef4444;
  --warning-color: #f97316;
  
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  --white: #ffffff;
  --black: #000000;
  
  /* Dynamic colors that change with theme */
  --bg-primary: var(--white);
  --bg-secondary: var(--gray-50);
  --bg-tertiary: var(--gray-100);
  --bg-hover: var(--gray-100);
  --bg-active: var(--gray-200);
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-muted: var(--gray-500);
  --border-color: var(--gray-200);
  --border-hover: var(--gray-300);
  --accent-bg: color-mix(in srgb, var(--primary-color) 10%, transparent);
  --accent-border: color-mix(in srgb, var(--primary-color) 20%, transparent);
  
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
}

/* Dark mode variables */
.dark {
  --bg-primary: var(--gray-800);
  --bg-secondary: var(--gray-900);
  --bg-tertiary: var(--gray-700);
  --bg-hover: var(--gray-700);
  --bg-active: var(--gray-600);
  --text-primary: var(--gray-100);
  --text-secondary: var(--gray-400);
  --text-muted: var(--gray-500);
  --border-color: var(--gray-700);
  --border-hover: var(--gray-600);
  --accent-bg: color-mix(in srgb, var(--primary-color) 20%, var(--gray-800));
  --accent-border: color-mix(in srgb, var(--primary-color) 40%, var(--gray-700));
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  margin: 0;
  padding: 0;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Header & Navigation */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  height: 64px;
}

.nav__brand {
  display: flex;
  align-items: center;
}

.nav__logo {
  text-decoration: none;
  color: var(--primary-color);
  font-weight: 700;
  font-size: var(--font-size-xl);
}

.nav__logo-text {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav__menu {
  display: flex;
  gap: 2rem;
}

.nav__link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: all 0.2s;
}

.nav__link:hover {
  color: var(--primary-color);
  background-color: var(--bg-hover);
}

.nav__link--active {
  color: var(--primary-color);
  background-color: var(--accent-bg);
  border: 1px solid var(--accent-border);
}

.nav__user {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav__points,
.nav__streak {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: all 0.2s;
}

.nav__avatar:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown__menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  min-width: 160px;
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  display: none;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.dropdown__menu[data-dropdown-open] {
  display: block;
}

.dropdown__item {
  display: block;
  padding: 0.5rem 1rem;
  text-decoration: none;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  transition: background-color 0.2s, color 0.2s;
}

.dropdown__item:hover {
  background-color: var(--bg-hover);
}

.dropdown__item--danger {
  color: var(--danger-color);
}

.dropdown__item--danger:hover {
  background-color: color-mix(in srgb, var(--danger-color) 10%, var(--bg-hover));
}

.dropdown__divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 0.5rem 0;
  transition: border-color 0.2s ease;
}

/* Main Content */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
  min-height: calc(100vh - 128px);
}

/* Alerts - Fixed positioning to avoid pushing content */
.alert {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  max-width: 600px;
  width: calc(100% - 2rem);
  padding: 1rem 3rem 1rem 1rem;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 9999;
  box-shadow: var(--shadow-lg);
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.alert--success {
  background-color: color-mix(in srgb, var(--secondary-color) 10%, var(--bg-primary));
  color: var(--secondary-color);
  border: 1px solid color-mix(in srgb, var(--secondary-color) 20%, transparent);
}

.alert--error {
  background-color: color-mix(in srgb, var(--danger-color) 10%, var(--bg-primary));
  color: var(--danger-color);
  border: 1px solid color-mix(in srgb, var(--danger-color) 20%, transparent);
}

.alert__close {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: inherit;
  opacity: 0.7;
  padding: 0.25rem;
  transition: opacity 0.2s;
}

.alert__close:hover {
  opacity: 1;
}

/* Mobile adjustments for alerts */
@media (max-width: 768px) {
  .alert {
    top: 0.5rem;
    width: calc(100% - 1rem);
    padding: 0.875rem 2.5rem 0.875rem 0.875rem;
    font-size: var(--font-size-sm);
  }
  
  .alert__close {
    right: 0.5rem;
    font-size: 1.25rem;
  }
}

/* Cards */
.card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.card__header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.2s ease;
}

.card__title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.card__content {
  padding: 1.5rem;
}

.card__footer {
  padding: 1rem 1.5rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  gap: 0.5rem;
}

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

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

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

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

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

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

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-sm);
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: var(--font-size-lg);
}

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

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s, color 0.2s;
}

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

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.form-error {
  color: var(--danger-color);
  font-size: var(--font-size-sm);
  margin-top: 0.25rem;
}

/* Grid */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-gray-500 { color: var(--text-muted); }
.text-gray-600 { color: var(--text-secondary); }
.text-gray-700 { color: var(--text-primary); }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--secondary-color); }
.text-danger { color: var(--danger-color); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: auto;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.footer__content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: color 0.2s ease;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    padding: 0 0.5rem;
  }
  
  .nav__menu {
    display: none;
  }
  
  .main {
    padding: 1rem 0.5rem;
  }
  
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}
/* Global Text Color Fixes for Dark Mode */
/* Override hardcoded gray colors with dynamic variables */

/* Primary text colors (headings, main content) */
h1, h2, h3, h4, h5, h6,
.lesson-header__title,
.exercise-header__title,
.card__title,
.course-card__title,
.lesson-nav-title,
.exercise-progress-title,
.completion-modal__title,
.completion-card__title,
.no-exercises__title,
.auth-title,
.profile-info__name,
.profile-info__value,
.stat-card__value,
.activity-item__title,
.achievement-card__title,
.activity-summary__value,
.settings-section__title,
.course-header__title,
.lesson-link,
.course-card__link,
.stat-value {
  color: var(--text-primary);
  transition: color 0.2s ease;
}

/* Secondary text colors (descriptions, labels) */
.lesson-description__content,
.exercise-counter,
.lesson-meta-text,
.exercise-progress-type,
.lesson-nav-label,
.lesson-stat__label,
.lesson-stat-card__label,
.completion-modal__message,
.completion-card__message,
.completion-stat__label,
.no-exercises__text,
.auth-subtitle,
.auth-footer-text,
.course-card__description,
.course-meta,
.lesson-meta,
.stat-label,
.profile-info__label,
.achievement-card__description,
.activity-summary__label,
.checkbox-label,
.form-label {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

/* Muted text colors (hints, placeholders) */
.hint-text,
.exercise-progress-points,
.lesson-stat__label,
.progress-chart__bar-value,
.empty-state__text,
.prerequisite-icon {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

/* Interactive elements */
.lesson-nav-link,
.option-text,
.exercise-question,
.exercise-text,
.course-level,
.course-tag {
  color: var(--text-primary);
  transition: color 0.2s ease;
}

/* Hover states */
.lesson-nav-link:hover,
.course-card__link:hover,
.lesson-link:hover {
  color: var(--primary-color);
}

/* Background colors for interactive elements */
.option-item:hover,
.lesson-item:hover {
  background-color: var(--bg-hover);
}

.course-level,
.course-tag,
.lesson-tag {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Exercise progress numbers */
.exercise-progress-number,
.lesson-nav-icon {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

/* Ensure proper contrast for all text elements */
* {
  color: inherit;
}

/* Fix any remaining hardcoded colors */
.dark * {
  border-color: var(--border-color);
}

.dark h1, .dark h2, .dark h3, .dark h4, .dark h5, .dark h6 {
  color: var(--text-primary);
}

.dark p, .dark span, .dark div {
  color: inherit;
}

/* Ensure form elements have proper colors */
.dark input, .dark textarea, .dark select {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.dark input::placeholder, .dark textarea::placeholder {
  color: var(--text-muted);
}

  /* Handle mobile safe areas (notches, home indicators) */
  .pb-safe {
    padding-bottom: env(safe-area-inset-bottom, 1);
  }
  
  /* Ensure full viewport height accounting for mobile browser UI */
  @supports (-webkit-touch-callout: none) {
    /* iOS specific */
    .conversation-area {
      height: -webkit-fill-available;
    }
  }
  
  /* Prevent overscroll on mobile */
  .conversation-area {
    overscroll-behavior: contain;
  }