/* Cunilingo v2 - Professional Study Platform */
/* "The #1 Study Aide for Nomadic Education" */

:root {
  --cuni-navy: #1a365d;
  --cuni-navy-light: #2d4a7c;
  --cuni-navy-dark: #0f2340;
  --cuni-blue: #3182ce;
  --cuni-blue-light: #bee3f8;
  --cuni-gray-900: #1a202c;
  --cuni-gray-700: #4a5568;
  --cuni-gray-500: #718096;
  --cuni-gray-300: #cbd5e0;
  --cuni-gray-100: #f7fafc;
  --cuni-white: #ffffff;
  --cuni-green: #38a169;
  --cuni-green-light: #c6f6d5;
  --cuni-yellow: #ecc94b;
  --cuni-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  font-family: var(--cuni-font);
  background: var(--cuni-gray-100);
  color: var(--cuni-gray-900);
  line-height: 1.6;
  min-height: 100vh;
  padding-top: 36px;
}

/* Site Navigation */
.cuni-nav {
  position: fixed;
  top: 36px;
  left: 0;
  width: 100vw;
  z-index: 100;
  background: var(--cuni-white);
  border-bottom: 1px solid var(--cuni-gray-300);
  padding: 16px 24px;
  margin: 0;
  box-sizing: border-box;
}

.cuni-nav-inner {
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cuni-nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.cuni-nav-logo {
  height: 28px;
  width: auto;
}

.cuni-nav-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--cuni-navy);
  letter-spacing: -0.5px;
}

.cuni-nav-tagline {
  font-size: 0.75rem;
  color: var(--cuni-gray-500);
  margin-left: 16px;
  padding-left: 16px;
  border-left: 1px solid var(--cuni-gray-300);
}

.cuni-nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.cuni-nav-link {
  color: var(--cuni-gray-700);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}

.cuni-nav-link:hover {
  background: var(--cuni-gray-100);
  color: var(--cuni-navy);
}

.cuni-nav-btn {
  background: var(--cuni-blue);
  color: var(--cuni-white);
  padding: 8px 20px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}

.cuni-nav-btn:hover {
  background: var(--cuni-navy);
}

/* Main Layout */
.cuni-main {
  padding-top: 68px;
  min-height: calc(100vh - 36px);
}

/* Hero Section */
.cuni-hero {
  background: linear-gradient(135deg, var(--cuni-navy) 0%, var(--cuni-navy-light) 100%);
  padding: 60px 24px;
  text-align: center;
  color: var(--cuni-white);
}

.cuni-hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.cuni-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cuni-hero p {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 8px;
}

.cuni-hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  margin-top: 16px;
}

.cuni-hero-badge strong {
  color: var(--cuni-yellow);
}

/* Course Catalog */
.cuni-catalog {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px;
}

.cuni-catalog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.cuni-catalog-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cuni-gray-900);
}

.cuni-catalog-subtitle {
  font-size: 0.9rem;
  color: var(--cuni-gray-500);
  margin-top: 4px;
}

.cuni-catalog-filter {
  display: flex;
  gap: 8px;
}

.cuni-filter-btn {
  background: var(--cuni-white);
  border: 1px solid var(--cuni-gray-300);
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--cuni-gray-700);
  cursor: pointer;
  transition: all 0.2s;
}

.cuni-filter-btn:hover,
.cuni-filter-btn.active {
  background: var(--cuni-navy);
  color: var(--cuni-white);
  border-color: var(--cuni-navy);
}

/* Course Grid */
.cuni-course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

/* Course Card */
.cuni-course-card {
  background: var(--cuni-white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: 1px solid var(--cuni-gray-300);
}

.cuni-course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.cuni-course-header {
  background: var(--cuni-navy);
  padding: 20px;
  color: var(--cuni-white);
}

.cuni-course-code {
  font-size: 0.8rem;
  font-weight: 600;
  opacity: 0.8;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.cuni-course-name {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
}

.cuni-course-body {
  padding: 20px;
}

.cuni-course-desc {
  font-size: 0.9rem;
  color: var(--cuni-gray-700);
  margin-bottom: 16px;
  line-height: 1.5;
}

.cuni-course-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--cuni-gray-500);
  margin-bottom: 16px;
}

.cuni-course-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.cuni-course-progress {
  height: 4px;
  background: var(--cuni-gray-300);
  border-radius: 2px;
  overflow: hidden;
}

.cuni-course-progress-fill {
  height: 100%;
  background: var(--cuni-green);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.cuni-course-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-top: 1px solid var(--cuni-gray-300);
  background: var(--cuni-gray-100);
}

.cuni-course-status {
  font-size: 0.8rem;
  color: var(--cuni-gray-500);
}

.cuni-course-status.completed {
  color: var(--cuni-green);
  font-weight: 600;
}

.cuni-course-btn {
  background: var(--cuni-blue);
  color: var(--cuni-white);
  padding: 8px 20px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.cuni-course-btn:hover {
  background: var(--cuni-navy);
}

/* Study View */
.cuni-study {
  display: none;
  min-height: calc(100vh - 104px);
}

.cuni-study.active {
  display: block;
}

.cuni-study-header {
  background: var(--cuni-white);
  border-bottom: 1px solid var(--cuni-gray-300);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cuni-study-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.cuni-study-back {
  background: none;
  border: none;
  color: var(--cuni-gray-500);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background 0.2s;
}

.cuni-study-back:hover {
  background: var(--cuni-gray-100);
}

.cuni-study-course-code {
  font-size: 0.8rem;
  color: var(--cuni-gray-500);
}

.cuni-study-course-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--cuni-gray-900);
}

.cuni-study-progress {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cuni-study-progress-bar {
  width: 200px;
  height: 8px;
  background: var(--cuni-gray-300);
  border-radius: 4px;
  overflow: hidden;
}

.cuni-study-progress-fill {
  height: 100%;
  background: var(--cuni-green);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.cuni-study-progress-text {
  font-size: 0.85rem;
  color: var(--cuni-gray-500);
  font-weight: 500;
}

/* Study Modes */
.cuni-study-modes {
  display: flex;
  gap: 8px;
  padding: 16px 24px;
  background: var(--cuni-gray-100);
  border-bottom: 1px solid var(--cuni-gray-300);
}

.cuni-mode-btn {
  background: var(--cuni-white);
  border: 1px solid var(--cuni-gray-300);
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--cuni-gray-700);
  cursor: pointer;
  transition: all 0.2s;
}

.cuni-mode-btn:hover,
.cuni-mode-btn.active {
  background: var(--cuni-navy);
  color: var(--cuni-white);
  border-color: var(--cuni-navy);
}

/* Grid View */
.cuni-grid-view {
  padding: 32px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.cuni-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.cuni-study-card {
  background: var(--cuni-white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--cuni-gray-300);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.cuni-study-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.cuni-study-card-front {
  padding: 24px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--cuni-gray-300);
}

.cuni-study-card-term {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cuni-gray-900);
  margin-bottom: 4px;
}

.cuni-study-card-pronunciation {
  font-size: 0.85rem;
  color: var(--cuni-gray-500);
  font-style: italic;
}

.cuni-study-card-back {
  padding: 20px;
  background: var(--cuni-gray-100);
  font-size: 0.9rem;
  color: var(--cuni-gray-700);
  line-height: 1.5;
  display: none;
}

.cuni-study-card.flipped .cuni-study-card-back {
  display: block;
}

.cuni-study-card-example {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--cuni-gray-300);
  font-style: italic;
  color: var(--cuni-gray-500);
}

/* Single Card View */
.cuni-single-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  min-height: calc(100vh - 220px);
}

.cuni-flashcard {
  background: var(--cuni-white);
  border-radius: 16px;
  width: 100%;
  max-width: 600px;
  min-height: 360px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--cuni-gray-300);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px;
  text-align: center;
  position: relative;
}

.cuni-card-number {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 0.8rem;
  color: var(--cuni-gray-500);
}

/* SVG Display for Hobo Signs */
.cuni-card-svg {
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  border: 3px solid var(--cuni-gray-300);
  background: var(--cuni-gray-100);
}

.cuni-card-svg svg {
  width: 72px;
  height: 72px;
}

.cuni-flashcard.has-svg .cuni-card-pronunciation {
  margin-bottom: 24px;
}

/* Hide term initially for hobo sign flashcards */
.cuni-card-term.hidden-until-reveal {
  display: none;
}

.cuni-card-term.hidden-until-reveal.revealed {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* Prompt for hobo sign flashcards */
.cuni-card-prompt {
  font-size: 1.1rem;
  color: var(--cuni-gray-500);
  font-style: italic;
  margin-bottom: 32px;
}

/* Grid view SVG */
.cuni-study-card-svg {
  width: 64px;
  height: 64px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 2px solid var(--cuni-gray-300);
  background: var(--cuni-gray-100);
}

.cuni-study-card-svg svg {
  width: 40px;
  height: 40px;
}

.cuni-study-card.has-svg .cuni-study-card-front {
  padding-top: 20px;
}

.cuni-study-card-prompt {
  font-size: 0.85rem;
  color: var(--cuni-gray-500);
  font-style: italic;
  margin-top: 8px;
}

.cuni-study-card.has-svg .cuni-study-card-back .cuni-study-card-term {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cuni-gray-900);
  margin-bottom: 8px;
}

.cuni-card-term {
  font-size: 2rem;
  font-weight: 700;
  color: var(--cuni-gray-900);
  margin-bottom: 8px;
}

.cuni-card-pronunciation {
  font-size: 1rem;
  color: var(--cuni-gray-500);
  font-style: italic;
  margin-bottom: 32px;
}

.cuni-card-definition {
  font-size: 1.1rem;
  color: var(--cuni-gray-700);
  line-height: 1.6;
  padding: 24px;
  background: var(--cuni-gray-100);
  border-radius: 12px;
  margin-bottom: 16px;
  display: none;
}

.cuni-card-definition a {
  color: var(--cuni-blue);
  text-decoration: none;
  font-weight: 500;
}

.cuni-card-definition a:hover {
  text-decoration: underline;
}

.cuni-card-definition.revealed {
  display: block;
  animation: fadeIn 0.3s ease;
}

.cuni-card-example {
  font-size: 0.95rem;
  color: var(--cuni-gray-500);
  font-style: italic;
  display: none;
}

.cuni-card-example.revealed {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

/* Buttons */
.cuni-btn {
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

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

.cuni-btn-primary:hover {
  background: var(--cuni-navy);
}

.cuni-btn-secondary {
  background: var(--cuni-white);
  color: var(--cuni-gray-700);
  border: 1px solid var(--cuni-gray-300);
}

.cuni-btn-secondary:hover {
  background: var(--cuni-gray-100);
}

/* Rating Buttons */
.cuni-rating-buttons {
  display: none;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}

.cuni-rating-buttons.revealed {
  display: flex;
}

.cuni-rating-btn {
  flex: 1;
  max-width: 160px;
  padding: 14px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-align: center;
}

.cuni-rating-btn.easy {
  background: var(--cuni-green);
  color: var(--cuni-white);
}

.cuni-rating-btn.medium {
  background: var(--cuni-blue);
  color: var(--cuni-white);
}

.cuni-rating-btn.hard {
  background: var(--cuni-gray-500);
  color: var(--cuni-white);
}

.cuni-rating-btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

/* Navigation Arrows */
.cuni-nav-arrows {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.cuni-nav-arrow {
  background: var(--cuni-white);
  border: 1px solid var(--cuni-gray-300);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--cuni-gray-700);
  transition: all 0.2s;
}

.cuni-nav-arrow:hover {
  background: var(--cuni-navy);
  color: var(--cuni-white);
  border-color: var(--cuni-navy);
}

.cuni-nav-arrow:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* XP Counter (subtle, in corner) */
.cuni-xp-counter {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--cuni-white);
  padding: 12px 20px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--cuni-gray-300);
  font-size: 0.85rem;
  color: var(--cuni-gray-700);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 50;
}

.cuni-xp-value {
  font-weight: 700;
  color: var(--cuni-navy);
}

.cuni-xp-label {
  color: var(--cuni-gray-500);
}

.cuni-xp-gain {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--cuni-green);
  color: var(--cuni-white);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 10px;
  animation: xpPop 0.5s ease forwards;
  opacity: 0;
}

@keyframes xpPop {
  0% { opacity: 0; transform: translateY(10px); }
  20% { opacity: 1; transform: translateY(0); }
  80% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-10px); }
}

/* Footer */
.cuni-footer {
  background: var(--cuni-navy-dark);
  color: var(--cuni-white);
  padding: 40px 24px;
  text-align: center;
}

.cuni-footer-inner {
  max-width: 800px;
  margin: 0 auto;
}

.cuni-footer-brand {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cuni-footer-tagline {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-bottom: 24px;
}

.cuni-footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
}

.cuni-footer-link {
  color: var(--cuni-white);
  text-decoration: none;
  font-size: 0.85rem;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.cuni-footer-link:hover {
  opacity: 1;
}

.cuni-footer-partner {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cuni-footer-partner-text {
  font-size: 0.8rem;
  opacity: 0.6;
  margin-bottom: 8px;
}

.cuni-footer-partner-logo {
  font-weight: 700;
  color: var(--cuni-yellow);
}

/* Mobile Hamburger Menu */
.cuni-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: 8px;
}

.cuni-hamburger svg {
  width: 24px;
  height: 24px;
  color: var(--cuni-gray-700);
}

/* Slide-out Drawer */
.cuni-drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.cuni-drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}

.cuni-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  max-width: 85vw;
  height: 100%;
  background: var(--cuni-white);
  z-index: 201;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.cuni-drawer.active {
  transform: translateX(0);
}

.cuni-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--cuni-gray-300);
}

.cuni-drawer-title {
  font-weight: 600;
  color: var(--cuni-gray-900);
}

.cuni-drawer-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--cuni-gray-500);
}

.cuni-drawer-close svg {
  width: 24px;
  height: 24px;
}

.cuni-drawer-links {
  flex: 1;
  padding: 16px 0;
}

.cuni-drawer-link {
  display: block;
  padding: 12px 20px;
  color: var(--cuni-gray-700);
  text-decoration: none;
  font-size: 1rem;
  transition: background 0.2s;
}

.cuni-drawer-link:hover {
  background: var(--cuni-gray-100);
  color: var(--cuni-navy);
}

.cuni-drawer-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--cuni-gray-300);
}

.cuni-drawer-btn {
  display: block;
  width: 100%;
  text-align: center;
  background: var(--cuni-blue);
  color: var(--cuni-white);
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

/* Avatar & Popover */
.cuni-avatar-container {
  position: relative;
}

.cuni-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--cuni-gray-300);
  transition: border-color 0.2s;
  object-fit: cover;
}

.cuni-avatar:hover {
  border-color: var(--cuni-blue);
}

.cuni-avatar-popover {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 260px;
  background: var(--cuni-white);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--cuni-gray-300);
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
}

.cuni-avatar-popover.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.cuni-avatar-popover::before {
  content: '';
  position: absolute;
  top: -8px;
  right: 12px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid var(--cuni-white);
}

.cuni-popover-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--cuni-gray-300);
}

.cuni-popover-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.cuni-popover-name {
  font-weight: 600;
  color: var(--cuni-gray-900);
}

.cuni-popover-username {
  font-size: 0.85rem;
  color: var(--cuni-gray-500);
}

.cuni-popover-stats {
  padding: 16px;
  background: var(--cuni-gray-100);
}

.cuni-popover-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.cuni-popover-stat-label {
  color: var(--cuni-gray-500);
}

.cuni-popover-stat-value {
  font-weight: 700;
  color: var(--cuni-navy);
}

.cuni-popover-actions {
  padding: 8px;
}

.cuni-popover-btn {
  display: block;
  width: 100%;
  padding: 10px 16px;
  text-align: left;
  background: none;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--cuni-gray-700);
  cursor: pointer;
  transition: background 0.2s;
}

.cuni-popover-btn:hover {
  background: var(--cuni-gray-100);
}

.cuni-popover-btn.logout {
  color: #e53e3e;
}

/* Sticky Study Header */
.cuni-study-header {
  background: var(--cuni-white);
  border-bottom: 1px solid var(--cuni-gray-300);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 104px; /* 36px (vagibond header) + 68px (nav) */
  z-index: 90;
}

.cuni-study-modes {
  display: flex;
  gap: 8px;
  padding: 16px 24px;
  background: var(--cuni-gray-100);
  border-bottom: 1px solid var(--cuni-gray-300);
  position: sticky;
  top: 164px; /* 104px + 60px (study header) */
  z-index: 89;
}

/* Card Actions (Gruntslate, Share, etc.) */
.cuni-card-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--cuni-gray-300);
}

.cuni-card-action {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--cuni-gray-100);
  border: 1px solid var(--cuni-gray-300);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--cuni-gray-700);
  cursor: pointer;
  transition: all 0.2s;
}

.cuni-card-action:hover {
  background: var(--cuni-gray-300);
  color: var(--cuni-gray-900);
}

.cuni-card-action svg {
  width: 16px;
  height: 16px;
}

.cuni-card-action.gruntslated {
  background: #6b46c1;
  color: var(--cuni-white);
  border-color: #6b46c1;
}

.cuni-card-action.speaking {
  background: var(--cuni-blue);
  color: var(--cuni-white);
  border-color: var(--cuni-blue);
}

/* Gruntslated card state */
.cuni-flashcard.gruntslated .cuni-card-term,
.cuni-flashcard.gruntslated .cuni-card-definition,
.cuni-flashcard.gruntslated .cuni-card-example {
  font-family: 'Courier New', monospace;
  color: #6b46c1;
  letter-spacing: 0.5px;
}

.cuni-flashcard.gruntslated {
  border-color: #6b46c1;
  background: linear-gradient(135deg, rgba(107, 70, 193, 0.02) 0%, rgba(107, 70, 193, 0.05) 100%);
}

/* Share link input */
.cuni-share-input {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--cuni-white);
  border: 1px solid var(--cuni-gray-300);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 12px;
  width: 320px;
  max-width: 90vw;
  z-index: 100;
}

.cuni-share-input.active {
  display: block;
}

.cuni-share-input input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--cuni-gray-300);
  border-radius: 6px;
  font-size: 0.85rem;
}

.cuni-share-copy {
  margin-top: 8px;
  width: 100%;
  padding: 8px;
  background: var(--cuni-blue);
  color: var(--cuni-white);
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

/* Gruntslate spin animation */
@keyframes gruntslate-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
  .cuni-nav-actions {
    display: none;
  }

  .cuni-hamburger {
    display: block;
  }

  .cuni-hero h1 {
    font-size: 1.8rem;
  }

  .cuni-hero p {
    font-size: 1rem;
  }

  .cuni-nav-tagline {
    display: none;
  }

  .cuni-catalog-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .cuni-course-grid {
    grid-template-columns: 1fr;
  }

  .cuni-card-grid {
    grid-template-columns: 1fr;
  }

  .cuni-flashcard {
    padding: 32px 24px;
    min-height: 300px;
  }

  .cuni-card-term {
    font-size: 1.5rem;
  }

  .cuni-rating-buttons {
    flex-direction: column;
  }

  .cuni-rating-btn {
    max-width: none;
    width: 100%;
  }

  .cuni-study-progress-bar {
    width: 100px;
  }

  .cuni-xp-counter {
    bottom: 16px;
    right: 16px;
    padding: 8px 16px;
  }

  .cuni-study-header {
    top: 104px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .cuni-study-modes {
    top: 154px;
  }

  .cuni-card-actions {
    flex-wrap: wrap;
  }

  .cuni-avatar-popover {
    right: -50px;
  }
}