/* =============================================================================
   TradersVault Academy — features.css
   All 15 feature styles in one file
   ============================================================================= */

/* ============================================================
   FEATURE 1: Dark/Light Mode Smooth Transition
   ============================================================ */
html.theme-transitioning,
html.theme-transitioning *,
html.theme-transitioning *::before,
html.theme-transitioning *::after {
  transition: background-color 0.4s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* ============================================================
   FEATURE 2: Keyboard Shortcuts Modal
   ============================================================ */
.kbd-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  backdrop-filter: blur(4px);
}
.kbd-modal-overlay.visible {
  opacity: 1;
  pointer-events: all;
}
.kbd-modal {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 480px;
  width: calc(100% - var(--space-8));
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
  transform: scale(0.95);
  transition: transform 0.2s ease;
}
.kbd-modal-overlay.visible .kbd-modal {
  transform: scale(1);
}
.kbd-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}
.kbd-modal-header h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}
.kbd-modal-close {
  background: none;
  border: none;
  color: var(--color-text-faint);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}
.kbd-modal-close:hover { color: var(--color-text); }
.kbd-rows {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.kbd-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.kbd-row:last-child { border-bottom: none; }
.kbd-key {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}
.kbd-key kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  padding: 0 var(--space-2);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  font-family: 'monospace', monospace;
  font-size: 0.75rem;
  color: var(--color-text);
  font-style: normal;
}

/* ============================================================
   FEATURE 3: Reading Time Badge
   ============================================================ */
.reading-time-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  margin-top: var(--space-3);
  font-weight: 500;
  width: fit-content;
}
.reading-time-badge svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* ============================================================
   FEATURE 4: Course Completion Certificate Button
   ============================================================ */
.cert-download-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: linear-gradient(135deg, #22C55E, #16A34A);
  color: white;
  border: none;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 16px rgba(34, 197, 94, 0.25);
  text-decoration: none;
  margin-top: var(--space-4);
}
.cert-download-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(34, 197, 94, 0.4);
}
.cert-completion-toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-card);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-6);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 320px;
  max-width: 480px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.cert-completion-toast.visible {
  transform: translateX(-50%) translateY(0);
}
.cert-toast-icon {
  width: 36px;
  height: 36px;
  background: rgba(34, 197, 94, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #22C55E;
  flex-shrink: 0;
}
.cert-toast-content strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 2px;
}
.cert-toast-content span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================================
   FEATURE 5: Lesson Bookmarks
   ============================================================ */
.bookmark-btn {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-faint);
  transition: all var(--transition-fast);
  z-index: 5;
}
.bookmark-btn:hover {
  color: #F59E0B;
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.06);
}
.bookmark-btn.active {
  color: #F59E0B;
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.08);
}
.bookmark-btn svg {
  transition: transform 0.2s ease;
}
.bookmark-btn.active svg {
  transform: scale(1.15);
  fill: #F59E0B;
}

/* Bookmarks in dropdown */
.dropdown-bookmarks {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border-subtle);
}
.dropdown-bookmarks-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  padding: var(--space-2) var(--space-3);
}
.bookmark-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.bookmark-item:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.bookmark-item svg { flex-shrink: 0; color: #F59E0B; }

/* ============================================================
   FEATURE 6: Cmd+K Search Spotlight
   ============================================================ */
.spotlight-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 10001;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: clamp(60px, 12vh, 120px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
  backdrop-filter: blur(6px);
}
.spotlight-overlay.visible {
  opacity: 1;
  pointer-events: all;
}
.spotlight-modal {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  width: min(560px, calc(100vw - 32px));
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
  overflow: hidden;
  transform: scale(0.96) translateY(-8px);
  transition: transform 0.18s ease;
}
.spotlight-overlay.visible .spotlight-modal {
  transform: scale(1) translateY(0);
}
.spotlight-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
}
.spotlight-icon { color: var(--color-text-faint); flex-shrink: 0; }
.spotlight-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  caret-color: var(--color-primary);
}
.spotlight-input::placeholder { color: var(--color-text-faint); }
.spotlight-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  white-space: nowrap;
}
.spotlight-results {
  max-height: 360px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}
.spotlight-empty {
  padding: var(--space-8);
  text-align: center;
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}
.spotlight-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background var(--transition-fast);
  text-decoration: none;
}
.spotlight-result-item:last-child { border-bottom: none; }
.spotlight-result-item:hover,
.spotlight-result-item.active {
  background: var(--color-primary-subtle);
}
.spotlight-result-icon {
  width: 32px;
  height: 32px;
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-faint);
  flex-shrink: 0;
}
.spotlight-result-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}
.spotlight-result-sub {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.spotlight-result-cat {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  background: var(--color-surface-2);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: auto;
  flex-shrink: 0;
}
.spotlight-footer {
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.spotlight-footer kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 18px;
  padding: 0 4px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  border-radius: 3px;
  font-family: monospace;
  font-size: 0.65rem;
  color: var(--color-text-muted);
}
.spotlight-footer span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Highlighted search match */
.search-highlight {
  color: var(--color-primary);
  font-weight: 700;
}

/* ============================================================
   FEATURE 7: Back to Top Button
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(59,130,246,0.35);
  transform: translateY(-2px);
}

/* Offset when notes panel tab is present */
.back-to-top { right: calc(var(--space-6) + 40px); }
@media (max-width: 768px) {
  .back-to-top { right: var(--space-4); bottom: var(--space-4); }
}

/* ============================================================
   FEATURE 8: Print Stylesheet
   ============================================================ */
@media print {
  /* Hide everything except content */
  .nav,
  .mobile-menu,
  .lesson-sidebar,
  .footer,
  .notes-panel,
  .notes-tab,
  .scroll-progress,
  .back-to-top,
  .kbd-modal-overlay,
  .spotlight-overlay,
  .cert-completion-toast,
  .modal-overlay,
  .bookmark-btn,
  .lesson-nav-btns,
  .sidebar-toggle,
  .quiz-container,
  [data-theme-toggle],
  .chat-widget,
  .scroll-indicator {
    display: none !important;
  }

  html, body {
    background: white !important;
    color: black !important;
  }

  .lesson-layout {
    display: block !important;
  }

  .lesson-content {
    width: 100% !important;
    max-width: none !important;
    padding: 0 !important;
  }

  .course-header {
    padding: 2rem 0 1rem !important;
    background: white !important;
    color: black !important;
  }
  .course-header::before { display: none !important; }
  .course-header h1 { color: black !important; font-size: 2rem !important; }
  .course-header > p { color: #444 !important; }

  .lesson-header h2, .lesson h2, h1, h2, h3 {
    color: black !important;
    page-break-after: avoid;
  }

  .lesson-body p, .lesson-body ul, .lesson-body ol, .lesson-body li {
    color: #333 !important;
  }

  .lesson-body strong { color: black !important; }

  .callout, .analogy-box, .compare-table, .market-card {
    border: 1px solid #ccc !important;
    background: white !important;
    color: #333 !important;
    page-break-inside: avoid;
  }

  .lesson { page-break-inside: avoid; }

  a { color: black !important; text-decoration: underline; }

  pre, code {
    background: #f5f5f5 !important;
    color: #333 !important;
    border: 1px solid #ddd !important;
  }

  .reading-time-badge {
    background: #f5f5f5 !important;
    border-color: #ddd !important;
    color: #555 !important;
  }
  .reading-time-badge svg { display: none; }

  .level-badge {
    background: #f5f5f5 !important;
    border-color: #ddd !important;
    color: #333 !important;
  }

  @page {
    margin: 1.5cm 2cm;
    size: A4;
  }
}

/* ============================================================
   FEATURE 9: Progress Streak Tracker
   ============================================================ */
.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  padding: 3px 8px;
  cursor: default;
  transition: all var(--transition-fast);
  position: relative;
  user-select: none;
}
.streak-badge:hover .streak-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
  pointer-events: all;
}
.streak-badge .streak-count {
  color: #F97316;
  font-weight: 800;
}
.streak-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(0px);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 200;
}
.streak-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-border);
}
.streak-tooltip strong { color: var(--color-text); display: block; margin-bottom: 2px; }

/* ============================================================
   FEATURE 10: Confetti Animation
   ============================================================ */
.confetti-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9998;
  overflow: hidden;
}
.confetti-piece {
  position: absolute;
  top: -20px;
  width: 10px;
  height: 10px;
  opacity: 0;
  animation: confetti-fall linear forwards;
}
@keyframes confetti-fall {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg) scale(1);
  }
  80% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(100vh) rotate(720deg) scale(0.5);
  }
}

/* ============================================================
   FEATURE 11: Glossary Tooltip System
   ============================================================ */
[data-glossary] {
  border-bottom: 1px dashed var(--color-text-faint);
  cursor: help;
  position: relative;
}
.glossary-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  max-width: 260px;
  min-width: 180px;
  z-index: 500;
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  font-style: normal;
  text-align: left;
}
.glossary-tooltip.visible {
  opacity: 1;
}
.glossary-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-border);
}
.glossary-term {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}
.glossary-def {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ============================================================
   FEATURE 12: Breadcrumb Navigation
   ============================================================ */
.features-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-3) 0 0 0;
}
.features-breadcrumb a {
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.features-breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb-sep {
  color: var(--color-border);
  font-size: 0.7rem;
}
.breadcrumb-current {
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ============================================================
   FEATURE 13: Copy Button on Code/Example Blocks
   ============================================================ */
.copy-btn-wrap {
  position: relative;
}
.copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-faint);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 4px;
  z-index: 5;
}
.copy-btn:hover {
  background: var(--color-primary-subtle);
  border-color: rgba(59,130,246,0.3);
  color: var(--color-primary);
}
.copy-btn.copied {
  background: rgba(34,197,94,0.1);
  border-color: rgba(34,197,94,0.3);
  color: #22C55E;
}

/* Example blocks with copy support */
.example-block {
  position: relative;
}
pre, code.block-code {
  position: relative;
}

/* ============================================================
   FEATURE 14: Difficulty Badges on Course Cards
   ============================================================ */
.difficulty-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-2);
}
.difficulty-beginner {
  background: rgba(34, 197, 94, 0.1);
  color: #22C55E;
  border: 1px solid rgba(34, 197, 94, 0.2);
}
.difficulty-intermediate {
  background: rgba(59, 130, 246, 0.1);
  color: #3B82F6;
  border: 1px solid rgba(59, 130, 246, 0.2);
}
.difficulty-advanced {
  background: rgba(139, 92, 246, 0.1);
  color: #8B5CF6;
  border: 1px solid rgba(139, 92, 246, 0.2);
}

/* ============================================================
   FEATURE 15: Animated Progress Ring on Course Cards
   ============================================================ */
.progress-ring-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.progress-ring-svg {
  transform: rotate(-90deg);
}
.progress-ring-track {
  fill: none;
  stroke: var(--color-border);
}
.progress-ring-fill {
  fill: none;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.progress-ring-pct {
  position: absolute;
  font-family: var(--font-display);
  font-size: 0.62rem;
  font-weight: 800;
  color: var(--color-text);
  text-align: center;
  line-height: 1;
  pointer-events: none;
}
/* Replaces the standard progress bar on cards — toggled by JS */
.course-card-progress-ring-container {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.progress-ring-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}