/* ============================================
   Grammar Lab Page - Unified Design System
   ============================================ */


.grammar-page {
  --grammar-font: 'Onest', -apple-system, BlinkMacSystemFont, sans-serif;
  --grammar-primary: var(--primary-600);
  --grammar-primary-dark: var(--primary-700);
  --grammar-surface: #ffffff;
  --grammar-surface-alt: #f8fafc;
  --grammar-text: #0f172a;
  --grammar-text-muted: #64748b;
  --grammar-border: #e2e8f0;
  --grammar-radius: 16px;
  --grammar-radius-sm: 10px;

  font-family: var(--grammar-font);
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

/* ============================================
   Hero Section
   ============================================ */

.grammar-hero {
  position: relative;
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 50%, var(--primary-400) 100%);
  border-radius: var(--grammar-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  overflow: hidden;
  color: #fff !important;
}

.grammar-hero__bg-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.grammar-hero .shape {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.grammar-hero .shape--1 {
  width: 200px;
  height: 200px;
  top: -60px;
  right: -30px;
  animation: float-1 18s ease-in-out infinite;
}

.grammar-hero .shape--2 {
  width: 120px;
  height: 120px;
  bottom: -40px;
  left: -20px;
  animation: float-2 14s ease-in-out infinite;
}

.grammar-hero .shape--3 {
  width: 80px;
  height: 80px;
  top: 50%;
  right: 25%;
  animation: float-3 20s ease-in-out infinite;
}

@keyframes float-1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-15px, 15px) scale(1.05); }
}

@keyframes float-2 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(20px, -15px) rotate(8deg); }
}

@keyframes float-3 {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
  50% { transform: translate(-25px, 10px) scale(1.1); opacity: 0.8; }
}

.grammar-hero__content {
  position: relative;
  z-index: 1;
}

.grammar-hero__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.grammar-hero__icon {
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.grammar-hero__title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.grammar-hero__subtitle {
  font-size: 0.9375rem;
  margin: 0.25rem 0 0;
  opacity: 0.9;
}

/* Stats Row */
.grammar-stats {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.grammar-stat {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--grammar-radius-sm);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.grammar-stat__icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.grammar-stat--xp .grammar-stat__icon {
  background: linear-gradient(135deg, var(--warning-500) 0%, #d97706 100%);
}

.grammar-stat--topics .grammar-stat__icon {
  background: rgba(255, 255, 255, 0.2);
}

.grammar-stat--accuracy .grammar-stat__icon {
  background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
}

.grammar-stat--mastered .grammar-stat__icon {
  background: linear-gradient(135deg, var(--danger-500) 0%, #dc2626 100%);
}

.grammar-stat__data {
  display: flex;
  flex-direction: column;
}

.grammar-stat__value {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1;
}

.grammar-stat__label {
  font-size: 0.6875rem;
  font-weight: 500;
  opacity: 0.8;
  margin-top: 0.125rem;
}

/* ============================================
   Section
   ============================================ */

.grammar-section {
  background: var(--grammar-surface);
  border-radius: var(--grammar-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--grammar-border);
}

.grammar-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.grammar-section__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--grammar-text);
  margin: 0;
  letter-spacing: -0.02em;
}

.grammar-section__subtitle {
  font-size: 0.8125rem;
  color: var(--grammar-text-muted);
  margin: 0.25rem 0 0;
}

.grammar-section__action {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, var(--grammar-primary) 0%, var(--primary-500) 100%);
  color: #fff !important;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.grammar-section__action:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(var(--primary-600-rgb), 0.4);
  color: #fff !important;
}

/* ============================================
   Recommendations Grid
   ============================================ */

.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.recommendation-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1rem;
  background: var(--grammar-surface-alt);
  border-radius: var(--grammar-radius-sm);
  border: 2px solid transparent;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}

.recommendation-card:hover {
  border-color: var(--grammar-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(var(--primary-600-rgb), 0.15);
}

.recommendation-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.recommendation-card__level {
  padding: 0.25rem 0.625rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff !important;
}

.recommendation-card__level--a {
  background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
}

.recommendation-card__level--b {
  background: linear-gradient(135deg, var(--warning-500) 0%, var(--danger-500) 100%);
}

.recommendation-card__level--c {
  background: linear-gradient(135deg, #ec4899 0%, var(--primary-500) 100%);
}

.recommendation-card__reason {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
}

.recommendation-card__reason--due_for_review {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.recommendation-card__reason--in_progress {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.recommendation-card__reason--new {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success-600);
}

.recommendation-card__content {
  flex: 1;
}

.recommendation-card__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--grammar-text);
  margin: 0 0 0.25rem;
  line-height: 1.3;
}

.recommendation-card__subtitle {
  font-size: 0.75rem;
  color: var(--grammar-text-muted);
  margin: 0;
  line-height: 1.4;
}

.recommendation-card__arrow {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--grammar-text-muted);
  opacity: 0;
  transition: all 0.25s ease;
}

.recommendation-card:hover .recommendation-card__arrow {
  opacity: 1;
  color: var(--grammar-primary);
}

/* ============================================
   Levels Grid
   ============================================ */

.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.level-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  background: var(--grammar-surface-alt);
  border-radius: var(--grammar-radius-sm);
  border: 2px solid transparent;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
  overflow: hidden;
}

.level-card:hover {
  border-color: var(--grammar-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(var(--primary-600-rgb), 0.15);
}

.level-card--current {
  background: linear-gradient(135deg, rgba(var(--primary-600-rgb), 0.08) 0%, rgba(var(--primary-500-rgb), 0.08) 100%);
  border-color: var(--grammar-primary);
}

.level-card--completed {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(16, 185, 129, 0.08) 100%);
}

.level-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.level-card__badge {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
}

.level-card--a .level-card__badge {
  background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  color: #fff !important;
}

.level-card--b .level-card__badge {
  background: linear-gradient(135deg, var(--warning-500) 0%, var(--danger-500) 100%);
  color: #fff !important;
}

.level-card--c .level-card__badge {
  background: linear-gradient(135deg, #ec4899 0%, var(--primary-500) 100%);
  color: #fff !important;
}

.level-card__code {
  letter-spacing: -0.02em;
}

.level-card__status {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.level-card__status--completed {
  background: var(--success-500);
  color: #fff !important;
}

.level-card__status--current {
  background: var(--grammar-primary);
  color: #fff !important;
}

.level-card__content {
  flex: 1;
  min-height: 48px;
}

.level-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--grammar-text);
  margin: 0 0 0.25rem;
  line-height: 1.3;
}

.level-card__desc {
  font-size: 0.8125rem;
  color: var(--grammar-text-muted);
  margin: 0;
  line-height: 1.4;
}

.level-card__footer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--grammar-border);
}

.level-card__stats {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.level-card__stat {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--grammar-text-muted);
}

.level-card__stat svg {
  color: var(--grammar-primary);
}

.level-card__progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.level-card__progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(var(--primary-600-rgb), 0.15);
  border-radius: 3px;
  overflow: hidden;
}

.level-card__progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--grammar-primary) 0%, var(--primary-500) 100%);
  border-radius: 3px;
  transition: width 0.5s ease;
}

.level-card--completed .level-card__progress-fill {
  background: linear-gradient(90deg, var(--success-500) 0%, #10b981 100%);
}

.level-card__progress-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--grammar-primary);
  min-width: 36px;
  text-align: right;
}

.level-card--completed .level-card__progress-text {
  color: var(--success-500);
}

.level-card__arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--grammar-text-muted);
  opacity: 0;
  transition: all 0.25s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.level-card:hover .level-card__arrow {
  opacity: 1;
  right: 0.75rem;
  color: var(--grammar-primary);
}

/* ============================================
   Actions Grid
   ============================================ */

.actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.action-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--grammar-surface-alt);
  border-radius: var(--grammar-radius-sm);
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
  border: 2px solid transparent;
}

.action-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.action-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.action-card--primary .action-card__icon {
  background: linear-gradient(135deg, var(--grammar-primary) 0%, var(--primary-500) 100%);
  color: #fff !important;
}

.action-card--primary:hover {
  border-color: var(--grammar-primary);
}

.action-card--secondary .action-card__icon {
  background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
  color: #fff !important;
}

.action-card--secondary:hover {
  border-color: var(--success-500);
}

.action-card--tertiary .action-card__icon {
  background: linear-gradient(135deg, var(--warning-500) 0%, #d97706 100%);
  color: #fff !important;
}

.action-card--tertiary:hover {
  border-color: var(--warning-500);
}

.action-card__content {
  flex: 1;
  min-width: 0;
}

.action-card__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--grammar-text);
  margin: 0 0 0.125rem;
}

.action-card__desc {
  font-size: 0.75rem;
  color: var(--grammar-text-muted);
  margin: 0;
}

.action-card__arrow {
  color: var(--grammar-text-muted);
  opacity: 0;
  transition: all 0.2s ease;
}

.action-card:hover .action-card__arrow {
  opacity: 1;
}

.action-card--primary:hover .action-card__arrow { color: var(--grammar-primary); }
.action-card--secondary:hover .action-card__arrow { color: var(--success-500); }
.action-card--tertiary:hover .action-card__arrow { color: var(--warning-500); }

/* ============================================
   Empty State
   ============================================ */

.grammar-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--grammar-text-muted);
}

.grammar-empty__icon {
  margin-bottom: 1rem;
  color: var(--grammar-border);
}

.grammar-empty h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--grammar-text);
  margin: 0 0 0.5rem;
}

.grammar-empty p {
  font-size: 0.875rem;
  margin: 0 0 1.25rem;
}

.grammar-empty__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  background: linear-gradient(135deg, var(--grammar-primary) 0%, var(--grammar-primary-dark) 100%);
  color: #fff !important;
  border-radius: 10px;
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.grammar-empty__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(var(--primary-600-rgb), 0.3);
  color: #fff !important;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 640px) {
  .grammar-page {
    padding: 0 0.75rem 2rem;
  }

  .grammar-hero {
    padding: 1.5rem;
  }

  .grammar-hero__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .grammar-hero__icon {
    width: 48px;
    height: 48px;
  }

  .grammar-hero__title {
    font-size: 1.375rem;
  }

  .grammar-stats {
    gap: 0.5rem;
  }

  .grammar-stat {
    flex: 1 1 calc(50% - 0.25rem);
    padding: 0.5rem 0.75rem;
  }

  .grammar-stat__icon {
    width: 28px;
    height: 28px;
  }

  .grammar-stat__value {
    font-size: 1rem;
  }

  .grammar-section {
    padding: 1.25rem;
  }

  .grammar-section__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .recommendations-grid,
  .levels-grid,
  .actions-grid {
    grid-template-columns: 1fr;
  }

  .level-card__arrow,
  .recommendation-card__arrow {
    display: none;
  }
}

/* ============================================
   CTA for anonymous users
   ============================================ */

.grammar-cta-section {
  border-color: var(--primary-500);
  background: linear-gradient(135deg, rgba(var(--primary-600-rgb), 0.04) 0%, rgba(var(--primary-500-rgb), 0.04) 100%);
}

.grammar-cta-inline {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.grammar-cta-inline__icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--grammar-primary) 0%, var(--primary-500) 100%);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff !important;
  flex-shrink: 0;
}

.grammar-cta-inline__content {
  flex: 1;
  min-width: 200px;
}

.grammar-cta-inline__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--grammar-text);
  margin: 0 0 0.25rem;
}

.grammar-cta-inline__desc {
  font-size: 0.8125rem;
  color: var(--grammar-text-muted);
  margin: 0;
  line-height: 1.5;
}

.grammar-cta-inline__btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--grammar-primary) 0%, var(--primary-500) 100%);
  color: #fff !important;
  border-radius: 10px;
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.grammar-cta-inline__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(var(--primary-600-rgb), 0.4);
  color: #fff !important;
}

@media (max-width: 640px) {
  .grammar-cta-inline { flex-direction: column; text-align: center; }
  .grammar-cta-inline__btn { width: 100%; justify-content: center; }
}

/* ============================================
   Page Load Animation
   ============================================ */

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

.grammar-hero {
  animation: slideUp 0.5s ease-out;
}

.grammar-section {
  animation: slideUp 0.5s ease-out both;
}

.grammar-section:nth-of-type(1) { animation-delay: 0.1s; }
.grammar-section:nth-of-type(2) { animation-delay: 0.2s; }
.grammar-section:nth-of-type(3) { animation-delay: 0.3s; }

.level-card,
.recommendation-card {
  animation: slideUp 0.4s ease-out both;
}

.level-card:nth-child(1),
.recommendation-card:nth-child(1) { animation-delay: 0.15s; }
.level-card:nth-child(2),
.recommendation-card:nth-child(2) { animation-delay: 0.2s; }
.level-card:nth-child(3),
.recommendation-card:nth-child(3) { animation-delay: 0.25s; }
.level-card:nth-child(4),
.recommendation-card:nth-child(4) { animation-delay: 0.3s; }
.level-card:nth-child(5),
.recommendation-card:nth-child(5) { animation-delay: 0.35s; }
.level-card:nth-child(6) { animation-delay: 0.4s; }

.action-card {
  animation: slideUp 0.3s ease-out both;
}

.action-card:nth-child(1) { animation-delay: 0.35s; }
.action-card:nth-child(2) { animation-delay: 0.4s; }
.action-card:nth-child(3) { animation-delay: 0.45s; }

/* ============================================
   Recommended Next Topic Card
   ============================================ */

.grammar-next-topic {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(135deg, rgba(var(--primary-600-rgb), 0.08) 0%, rgba(var(--primary-500-rgb), 0.04) 100%);
  border: 2px solid rgba(var(--primary-600-rgb), 0.2);
  border-radius: var(--grammar-radius);
  transition: all 0.2s;
}

.grammar-next-topic:hover {
  border-color: var(--grammar-primary);
  box-shadow: 0 4px 12px rgba(var(--primary-600-rgb), 0.15);
}

.grammar-next-topic__icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--grammar-primary) 0%, var(--primary-500) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff !important;
  flex-shrink: 0;
}

.grammar-next-topic__content {
  flex: 1;
  min-width: 0;
}

.grammar-next-topic__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--grammar-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.grammar-next-topic__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--grammar-text);
  margin: 0;
  line-height: 1.3;
}

.grammar-next-topic__subtitle {
  font-size: 0.85rem;
  color: var(--grammar-text-muted);
  margin: 0.125rem 0 0;
}

.grammar-next-topic__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.grammar-next-topic__level {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
}

.grammar-next-topic__level--a { background: #dbeafe; color: #1d4ed8; }
.grammar-next-topic__level--b { background: #fef3c7; color: #d97706; }
.grammar-next-topic__level--c { background: #fce7f3; color: #db2777; }

.grammar-next-topic__reason {
  font-size: 0.8rem;
  color: var(--grammar-text-muted);
}

.grammar-next-topic__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.625rem 1.25rem;
  background: var(--grammar-primary);
  color: #fff !important;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s;
  flex-shrink: 0;
}

.grammar-next-topic__btn:hover {
  background: var(--grammar-primary-dark);
  transform: translateX(2px);
}

/* ============================================
   Level Card Mastery Bar
   ============================================ */

.level-card__mastery {
  margin-top: 0.375rem;
}

.level-card__mastery-bar {
  height: 4px;
  background: rgba(34, 197, 94, 0.15);
  border-radius: 2px;
  overflow: hidden;
}

.level-card__mastery-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success-500) 0%, var(--success-600) 100%);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.level-card__mastery-text {
  display: block;
  font-size: 0.6875rem;
  color: var(--success-600);
  margin-top: 0.25rem;
  font-weight: 500;
}

@media (max-width: 600px) {
  .grammar-next-topic {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }

  .grammar-next-topic__meta {
    justify-content: center;
  }
}

/* ============================================
   Grammar Stats Empty State
   ============================================ */

.grammar-stats-empty {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--grammar-radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.grammar-stats-empty__text {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.9;
  flex: 1;
}

.grammar-stats-empty__cta {
  color: #fff !important;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  white-space: nowrap;
  padding: 0.375rem 0.875rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  transition: background 0.2s;
}

.grammar-stats-empty__cta:hover {
  background: rgba(255, 255, 255, 0.3);
  color: #fff !important;
}

/* ============================================
   Load More Button
   ============================================ */

.grammar-load-more {
  text-align: center;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--grammar-border);
}

.grammar-load-more__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  color: var(--grammar-primary);
  background: rgba(var(--primary-600-rgb), 0.06);
  border: 1px solid rgba(var(--primary-600-rgb), 0.2);
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
}

.grammar-load-more__btn:hover {
  background: rgba(var(--primary-600-rgb), 0.12);
  border-color: var(--grammar-primary);
  transform: translateY(-1px);
  color: var(--grammar-primary);
}