/**
 * DrawLeague Challenges Styles
 * Follows the graphic charter: Playful Minimal Creative
 */

/* Challenges Page Layout */
.challenges-page {
  min-height: calc(100vh - 200px);
  padding: var(--space-xl) 0;
  background: linear-gradient(180deg, var(--color-light-blue) 0%, var(--color-background) 40%);
  position: relative;
}

.challenges-page::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 500px;
  background-image: url('images/watercolor-texture.svg');
  background-size: 500px 500px;
  opacity: 0.1;
  pointer-events: none;
}

/* Section Headers */
.challenges-page .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.challenges-page .section-header h2 {
  margin: 0;
}

/* Editorial Section */
.editorial-section {
  margin-bottom: var(--space-xl);
  padding: var(--space-xl);
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-warm-cream, #FFF8F3) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(31, 41, 55, 0.04);
  box-shadow: 0 4px 16px rgba(31, 41, 55, 0.06);
  position: relative;
  overflow: hidden;
}

/* ===================================
   UNIFIED CHALLENGE CARD
   Used across all pages for consistent design
   =================================== */

.challenge-card-unified {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px rgba(31, 41, 55, 0.06);
  border: 1px solid rgba(31, 41, 55, 0.04);
  border-top: 4px solid var(--challenge-color, var(--color-accent));
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.challenge-card-unified:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(31, 41, 55, 0.1);
}

.challenge-card-unified .challenge-card-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--color-light-blue);
}

.challenge-card-unified .challenge-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.challenge-card-unified:hover .challenge-card-image img {
  transform: scale(1.05);
}

.challenge-card-unified .challenge-card-body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.challenge-card-unified .challenge-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--challenge-color, var(--color-accent));
  color: white;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-md);
  width: fit-content;
}

.challenge-card-unified .challenge-title {
  font-family: var(--font-handwritten, 'Caveat', cursive);
  font-size: var(--font-size-2xl);
  color: var(--color-charcoal);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.2;
}

.challenge-card-unified .challenge-dates {
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin: 0 0 var(--space-md) 0;
}

.challenge-card-unified .date-range {
  color: var(--color-muted);
}

.challenge-card-unified .countdown-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: rgba(211, 84, 0, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  font-weight: 600;
}

.challenge-card-unified .challenge-description {
  color: var(--color-charcoal);
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin: 0 0 var(--space-md) 0;
  flex: 1;
}

.challenge-card-unified .challenge-theme {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-md);
  padding: var(--space-sm);
  background: var(--color-background);
  border-radius: var(--radius-md);
}

.challenge-card-unified .challenge-footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(31, 41, 55, 0.06);
}

.challenge-card-unified .challenge-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.challenge-card-unified .status-badge {
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.challenge-card-unified .status-badge.active {
  background-color: rgba(76, 175, 80, 0.1);
  color: #4CAF50;
}

.challenge-card-unified .status-badge.upcoming {
  background-color: rgba(33, 150, 243, 0.1);
  color: #2196F3;
}

.challenge-card-unified .status-badge.ended {
  background-color: rgba(158, 158, 158, 0.1);
  color: #9E9E9E;
}

.challenge-card-unified .participants-count {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.challenge-card-unified .challenge-actions {
  display: flex;
  gap: var(--space-sm);
}

.challenge-card-unified .challenge-actions .btn {
  flex: 1;
  text-align: center;
  text-decoration: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .challenge-card-unified .challenge-card-image {
    height: 140px;
  }
  
  .challenge-card-unified .challenge-card-body {
    padding: var(--space-md);
  }
  
  .challenge-card-unified .challenge-title {
    font-size: var(--font-size-xl);
  }
}

/* =================================== */

.editorial-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-hover, #F57C00) 100%);
}

.section-subtitle {
  color: var(--color-muted);
  margin: 0;
  font-size: var(--font-size-base);
}

/* Editorial Challenges Grid */
.editorial-challenges-grid {
  display: grid !important;
  grid-template-columns: repeat(2, 1fr) !important;
  gap: var(--space-lg);
  width: 100%;
}

.editorial-challenges-grid > .challenge-card {
  width: 100% !important;
  min-width: 0 !important;
}

@media (max-width: 768px) {
  .editorial-challenges-grid {
    grid-template-columns: 1fr !important;
  }
}

/* Editorial Challenges Grid on challenges.html page */
.editorial-section .editorial-challenges-grid {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: var(--space-lg);
}

@media (max-width: 1024px) {
  .editorial-section .editorial-challenges-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

@media (max-width: 768px) {
  .editorial-section .editorial-challenges-grid {
    grid-template-columns: 1fr !important;
  }
}

/* Public Challenges Grid */
.public-challenges-grid {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: var(--space-lg);
  width: 100%;
}

.public-challenges-grid > .challenge-card-unified {
  width: 100% !important;
  min-width: 0 !important;
}

@media (max-width: 1024px) {
  .public-challenges-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

@media (max-width: 768px) {
  .public-challenges-grid {
    grid-template-columns: 1fr !important;
  }
}

/* Editorial Load More Container */
.editorial-load-more-container {
  display: flex;
  justify-content: center;
  margin-top: var(--space-xl);
}

.editorial-load-more-container button {
  min-width: 200px;
}

/* Editorial Challenge Card */
.editorial-challenge-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px rgba(31, 41, 55, 0.06);
  border: 1px solid rgba(31, 41, 55, 0.04);
  border-top: 4px solid var(--challenge-color, var(--color-accent));
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.editorial-challenge-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(31, 41, 55, 0.1);
}

.editorial-challenge-card.featured {
  border: 2px solid var(--color-accent);
  border-top: 4px solid var(--color-accent);
  background: linear-gradient(135deg, var(--color-surface) 0%, rgba(255, 152, 0, 0.03) 100%);
}

/* Editorial Card Image */
.editorial-card-image {
  width: 100%;
  height: 160px;
  overflow: hidden;
  background: var(--color-light-blue);
}

.editorial-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.editorial-challenge-card:hover .editorial-card-image img {
  transform: scale(1.05);
}

/* Editorial Card Icon Fallback */
.editorial-card-icon {
  width: 100%;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-light-blue);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.editorial-card-icon span {
  font-size: 4rem;
  line-height: 1;
}

/* Editorial Card Content */
.editorial-card-content {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}
}

.editorial-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--challenge-color, var(--color-accent));
  color: white;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.challenge-theme {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-md);
  padding: var(--space-sm);
  background: var(--color-background);
  border-radius: var(--radius-md);
}

.duration-badge {
  background-color: var(--color-background);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.challenge-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-accent);
  color: white;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.challenge-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-sm);
}

.challenge-dates {
  color: var(--color-muted);
  margin-bottom: var(--space-md);
}

.challenge-description {
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

/* Countdown */
.countdown {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.countdown-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-md);
  background-color: var(--color-background);
  border-radius: var(--radius-md);
  min-width: 70px;
}

.countdown-number {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-accent);
}

.countdown-label {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

/* Categories/Chips */
.challenge-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.category-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
}

.category-chip .color-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

/* Challenge Meta */
.challenge-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

/* Challenge Actions */
.challenge-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Public Section */
.public-section {
  padding: var(--space-lg) 0;
}

/* Filter Controls */
.filter-controls {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.filter-select {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  background-color: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  min-width: 150px;
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.15);
}

/* Challenges Grid */
.challenges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

/* Challenge Card */
.challenge-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px rgba(31, 41, 55, 0.04);
  transition: transform 200ms ease, box-shadow 200ms ease;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(31, 41, 55, 0.04);
  overflow: hidden;
}

.challenge-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(31, 41, 55, 0.1);
}

/* Challenge Card Image */
.challenge-card-image {
  width: 100%;
  height: 160px;
  overflow: hidden;
  background-color: var(--color-light-gray);
}

.challenge-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}

.challenge-card:hover .challenge-card-image img {
  transform: scale(1.05);
}

/* Challenge Card Content */
.challenge-card-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.challenge-card .challenge-title {
  font-size: var(--font-size-xl);
}

.challenge-card .challenge-description {
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.status-badge.active {
  background-color: #dcfce7;
  color: #166534;
}

.status-badge.upcoming {
  background-color: #dbeafe;
  color: #1e40af;
}

.status-badge.ended {
  background-color: var(--color-background);
  color: var(--color-muted);
}

/* Loading and Empty States */
.loading-state,
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl, 4rem) var(--space-xl);
  text-align: center;
  color: var(--color-muted);
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--color-light-blue) 0%, var(--color-background) 100%);
  border-radius: var(--radius-lg);
}

.empty-state::before {
  content: '';
  display: block;
  width: 120px;
  height: 100px;
  margin-bottom: var(--space-lg);
  background-image: url('images/empty-state-art.svg');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

.loading-state[hidden],
.empty-state[hidden] {
  display: none;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: var(--space-md);
}

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

.empty-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-user {
  display: flex;
  align-items: center;
}

.user-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-light-blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  overflow: hidden;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Nav Active State */
.nav-active {
  color: var(--color-accent) !important;
  font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
  .challenges-page .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-controls {
    width: 100%;
  }

  .filter-select {
    flex: 1;
  }

  .editorial-section {
    padding: var(--space-lg);
  }

  .editorial-challenges-grid {
    grid-template-columns: 1fr;
  }
}

/* My Challenges Page Specific */
.my-challenges-page .page-header {
  margin-bottom: var(--space-xl);
}

.my-challenges-page .page-header h2 {
  margin-bottom: var(--space-xs);
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
  padding: var(--space-xs);
  background-color: var(--color-background);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-sm) var(--space-md);
  border: none;
  background: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-muted);
  cursor: pointer;
  transition: all 150ms ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--color-text);
  background-color: var(--color-surface);
}

.tab-btn.active {
  color: var(--color-text);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

/* Visibility Badges */
.card-badges {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.visibility-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.visibility-badge.private {
  background-color: #fef3c7;
  color: #92400e;
}

.visibility-badge.editorial {
  background-color: rgba(255, 152, 0, 0.15);
  color: #c2410c;
}

.owner-badge {
  color: var(--color-accent) !important;
  font-weight: 600;
}

/* Card Header Row */
.card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* Empty Actions */
.empty-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

/* Auth Required */
.auth-required {
  max-width: 400px;
  margin: var(--space-xl) auto;
  padding: var(--space-xl);
}

/* Challenge Rules */
.challenge-rules {
  padding: var(--space-md);
  background-color: var(--color-background);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.challenge-rules strong {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.challenge-rules p {
  margin: 0;
  white-space: pre-line;
}

.challenge-rules ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.challenge-rules li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-xs);
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.challenge-rules li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

/* Challenge Detail Page */
.challenge-detail-page {
  min-height: calc(100vh - 200px);
  padding: var(--space-xl) 0;
  background-color: var(--color-background);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-muted);
  text-decoration: none;
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  transition: color 150ms ease;
}

.back-link:hover {
  color: var(--color-text);
}

/* Challenge Cover Image */
.challenge-cover-image {
  width: 100%;
  max-height: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.challenge-cover-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.challenge-header {
  margin-bottom: var(--space-lg);
}

.challenge-header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.challenge-badges {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.visibility-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  background-color: var(--color-light-blue);
}

.visibility-badge.editorial {
  background-color: var(--color-light-yellow);
}

.visibility-badge.private {
  background-color: var(--color-light-pink);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.status-badge.upcoming {
  background-color: var(--color-light-blue);
  color: var(--color-text);
}

.status-badge.active {
  background-color: var(--color-success);
  color: white;
}

.status-badge.ended {
  background-color: var(--color-muted);
  color: white;
}

.challenge-detail-page .challenge-title {
  font-size: var(--font-size-xxl);
  margin-bottom: var(--space-sm);
}

.challenge-detail-page .challenge-dates {
  color: var(--color-muted);
  margin-bottom: var(--space-md);
}

.challenge-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
}

.meta-icon {
  font-size: 1.2em;
}

.challenge-section {
  margin-bottom: var(--space-lg);
}

.challenge-section h3 {
  margin-bottom: var(--space-md);
  font-size: var(--font-size-lg);
}

.challenge-section .categories-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.countdown-display {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
}

.countdown-item {
  text-align: center;
}

.countdown-value {
  display: block;
  font-size: var(--font-size-xxl);
  font-weight: 700;
  color: var(--color-accent);
}

.countdown-label {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

/* Participants Section */
.participants-legend {
  margin-bottom: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.participants-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.participant-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.2s ease;
}

.participant-item:hover {
  background-color: var(--color-light-blue);
  border-color: var(--color-primary);
}

.participant-item.has-submitted {
  background-color: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
}

.participant-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  overflow: hidden;
}

.participant-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.participant-name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.submitted-check {
  color: #22c55e;
  font-weight: bold;
  font-size: 12px;
}

.participants-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.participant-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-background);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
}

.challenge-actions {
  display: flex;
  gap: var(--space-sm);
}

.error-state {
  max-width: 400px;
  margin: var(--space-xl) auto;
}

/* Submission Section */
.submission-form {
  margin-top: var(--space-md);
}

.submission-form .form-group {
  margin-bottom: var(--space-md);
}

.submission-form label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
}

.submission-form input[type="text"],
.submission-form input[type="url"],
.submission-form textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-family: var(--font-family);
  transition: border-color var(--transition-fast);
}

.submission-form input[type="text"]:focus,
.submission-form input[type="url"]:focus,
.submission-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.submission-form textarea {
  resize: vertical;
  min-height: 80px;
}

/* File Upload Area */
.file-upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background-color: var(--color-background);
}

.file-upload-area:hover,
.file-upload-area.dragover {
  border-color: var(--color-accent);
  background-color: rgba(255, 152, 0, 0.05);
}

.upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.upload-icon {
  font-size: 48px;
  opacity: 0.6;
}

.upload-placeholder p {
  margin: 0;
  color: var(--color-muted);
}

.upload-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.upload-preview img {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.form-hint {
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.hashtags-info {
  background-color: var(--color-background);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.hashtags-display {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-sm) 0;
}

.hashtag-chip {
  display: inline-block;
  background-color: var(--color-light-blue);
  color: var(--color-accent);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-family: monospace;
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.hashtag-chip:hover {
  background-color: var(--color-accent);
  color: white;
}

.submission-status {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
}

.submission-status.success {
  background-color: var(--color-success-bg, #e8f5e9);
}

.submission-status .status-icon {
  font-size: var(--font-size-xl);
  color: var(--color-success, #4caf50);
}

/* Submissions Gallery */
.submissions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.submission-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 150ms ease, box-shadow 150ms ease;
}

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

.submission-image-link {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-background);
}

.submission-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 150ms ease;
}

.submission-card:hover .submission-thumbnail {
  transform: scale(1.02);
}

.submission-info {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.submission-card .user-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.submission-card .user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.submission-card .username {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.submission-title {
  font-weight: 500;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.submission-card .submission-date {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

/* Legacy link style (kept for backwards compatibility) */
.submission-card .platform-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-accent);
  text-decoration: none;
  font-size: var(--font-size-sm);
}

.submission-card .platform-link:hover {
  text-decoration: underline;
}

/* Challenge card actions on home page */
.challenge-card-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

/* Share Link Card for Private Challenges */
.share-link-card {
  margin-top: var(--space-md);
  margin-left: var(--space-xl);
  padding: var(--space-md);
  background: var(--color-light-blue);
  border: 2px dashed var(--color-accent);
  border-radius: var(--radius-md);
}

.share-link-card h4 {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--font-size-md);
  color: var(--color-text);
}

.share-link-input-group {
  display: flex;
  gap: var(--space-sm);
  margin: var(--space-sm) 0;
}

.share-link-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-family: monospace;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.share-link-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* ===========================================
   Challenge Image Upload
   =========================================== */

.challenge-image-upload {
  margin-bottom: var(--space-lg);
}

.challenge-image-upload .upload-placeholder {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: border-color 150ms ease, background-color 150ms ease;
}

.challenge-image-upload .upload-placeholder:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.challenge-image-upload .upload-placeholder.drag-over {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.challenge-image-upload .upload-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--space-sm);
}

.challenge-image-upload .upload-placeholder p {
  margin: 0 0 var(--space-xs) 0;
  font-weight: 500;
}

.challenge-image-upload .upload-preview {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.challenge-image-upload .upload-preview img {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  background: var(--color-light-blue);
}

.challenge-image-upload .remove-image-btn {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 150ms ease;
  padding: 0;
}

.challenge-image-upload .remove-image-btn:hover {
  background: rgba(0, 0, 0, 0.8);
}