/**
 * ============================================
 * Stylesheet: community-felt-theme.css
 * Area:   海豹社區 毛氈質感主題覆蓋層
 * Version: v2.0
 * ============================================
 *
 * WHAT THIS FILE DOES:
 *   將整個社區頁面改造為毛線/毛氈質感風格。
 *   覆蓋 community.css 的基礎樣式，添加：
 *   - 毛氈紋理背景
 *   - 縫線邊框裝飾
 *   - 毛氈按鈕效果
 *   - 小海豹圖片替代 emoji
 *   - 毛氈動畫系統
 *   - 雪花/泡泡飄落效果
 *
 * DEPENDS ON:
 *   - community.css (基礎佈局)
 *   - community-v2.css (v2模組樣式)
 *   - /community/assets/felt-* (毛氈圖片資源)
 */

/* =============================================
   0. 毛氈主題 CSS 變量覆蓋
   ============================================= */
:root {
  /* 毛氈色彩系統 */
  --felt-cream: #FFF8F0;
  --felt-warm-white: #FFFBF5;
  --felt-light-blue: #E8F4FD;
  --felt-soft-pink: #FFF0F5;
  --felt-mint: #F0FFF4;
  --felt-lavender: #F5F0FF;
  --felt-deep-ocean: #1B2D4F;
  --felt-ocean-mid: #2A4A6B;

  /* 毛氈紋理 */
  --felt-noise: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");

  /* 縫線樣式 */
  --stitch-color: rgba(180, 160, 140, 0.3);
  --stitch-size: 8px;
  --stitch-gap: 4px;

  /* 覆蓋原有變量 */
  --mc-bg: var(--felt-cream);
  --mc-card-bg: var(--felt-warm-white);
  --mc-card-shadow: 0 3px 16px rgba(139, 115, 85, 0.08), 0 1px 4px rgba(139, 115, 85, 0.04);
  --mc-card-radius: 18px;
  --mc-border: rgba(180, 160, 140, 0.2);
}

/* =============================================
   1. 全局毛氈背景
   ============================================= */
#mujoo-community-app {
  background: var(--felt-cream);
  background-image:
    var(--felt-noise),
    url('/mujoo/community/assets/felt-bg-main.webp');
  background-size: 200px 200px, 400px 400px;
  background-blend-mode: overlay;
  position: relative;
}

/* 飄落的毛氈泡泡/雪花 */
#mujoo-community-app::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle 3px, rgba(78, 205, 196, 0.15) 100%, transparent 100%),
    radial-gradient(circle 2px, rgba(255, 107, 157, 0.12) 100%, transparent 100%),
    radial-gradient(circle 4px, rgba(167, 139, 250, 0.1) 100%, transparent 100%),
    radial-gradient(circle 2px, rgba(78, 205, 196, 0.12) 100%, transparent 100%),
    radial-gradient(circle 3px, rgba(255, 107, 157, 0.1) 100%, transparent 100%);
  background-size:
    7% 12%, 11% 15%, 9% 18%, 13% 10%, 8% 14%;
  background-position:
    10% 0%, 40% 0%, 70% 0%, 25% 0%, 85% 0%;
  animation: mc-felt-float 25s linear infinite;
}

@keyframes mc-felt-float {
  0% { background-position: 10% 0%, 40% 0%, 70% 0%, 25% 0%, 85% 0%; }
  100% { background-position: 10% 100%, 40% 100%, 70% 100%, 25% 100%, 85% 100%; }
}

/* =============================================
   2. 毛氈質感 Header
   ============================================= */
.mc-header {
  background:
    var(--felt-noise),
    url('/mujoo/community/assets/felt-bg-header.webp'),
    linear-gradient(135deg, var(--felt-deep-ocean) 0%, var(--felt-ocean-mid) 100%);
  background-size: 200px 200px, cover, 100% 100%;
  background-blend-mode: overlay, soft-light, normal;
  box-shadow:
    0 3px 20px rgba(27, 45, 79, 0.25),
    inset 0 -2px 0 rgba(255, 255, 255, 0.05);
  border-bottom: 3px solid transparent;
  border-image: repeating-linear-gradient(
    90deg,
    var(--stitch-color) 0px,
    var(--stitch-color) var(--stitch-size),
    transparent var(--stitch-size),
    transparent calc(var(--stitch-size) + var(--stitch-gap))
  ) 1;
}

.mc-header-logo .mc-logo-icon {
  display: inline-block;
  width: 32px;
  height: 32px;
  background: transparent;
  border-radius: 50%;
  font-size: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.mc-header-nav .mc-nav-link {
  position: relative;
  transition: all 0.3s ease;
}

.mc-header-nav .mc-nav-link:hover::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.6) 0px,
    rgba(255, 255, 255, 0.6) 4px,
    transparent 4px,
    transparent 7px
  );
}

/* =============================================
   3. 毛氈質感按鈕
   ============================================= */
.mc-btn {
  position: relative;
  border: 2px solid transparent;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.mc-btn::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  border: 2px dashed transparent;
  transition: border-color 0.3s;
  pointer-events: none;
}

.mc-btn:hover::before {
  border-color: rgba(255, 255, 255, 0.3);
}

.mc-btn:active {
  transform: scale(0.95);
}

.mc-btn-primary {
  background: linear-gradient(135deg, #4ECDC4, #44CF6C);
  box-shadow:
    0 3px 12px rgba(78, 205, 196, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.mc-btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow:
    0 6px 20px rgba(78, 205, 196, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.mc-btn-checkin {
  background: linear-gradient(135deg, #FF6B9D, #FF8E53);
  box-shadow:
    0 3px 12px rgba(255, 107, 157, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.mc-btn-checkin:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow:
    0 6px 20px rgba(255, 107, 157, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* =============================================
   4. 毛氈質感卡片 & 側邊欄
   ============================================= */
.mc-sidebar,
.mc-sidebar-right {
  position: relative;
}

.mc-sidebar-section {
  background:
    var(--felt-noise),
    linear-gradient(135deg, var(--felt-warm-white), #FFF5EE);
  background-size: 200px 200px, 100% 100%;
  border-radius: var(--mc-card-radius);
  border: 1px solid var(--mc-border);
  box-shadow: var(--mc-card-shadow);
  position: relative;
  overflow: hidden;
}

/* 縫線邊框效果 */
.mc-sidebar-section::before {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: calc(var(--mc-card-radius) - 4px);
  border: 2px dashed rgba(180, 160, 140, 0.15);
  pointer-events: none;
  z-index: 1;
}

.mc-sidebar-title {
  position: relative;
  padding-left: 12px;
}

.mc-sidebar-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 18px;
  background: linear-gradient(180deg, #4ECDC4, #FF6B9D);
  border-radius: 2px;
}

/* =============================================
   5. 毛氈質感帖子列表
   ============================================= */
.mc-post-card {
  background:
    var(--felt-noise),
    linear-gradient(135deg, #FFFFFF, var(--felt-warm-white));
  background-size: 200px 200px, 100% 100%;
  border: 1px solid var(--mc-border);
  border-radius: var(--mc-card-radius);
  box-shadow: var(--mc-card-shadow);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.mc-post-card::before {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: calc(var(--mc-card-radius) - 5px);
  border: 1.5px dashed rgba(180, 160, 140, 0.1);
  pointer-events: none;
  z-index: 1;
  transition: border-color 0.3s;
}

.mc-post-card:hover {
  transform: translateY(-3px);
  box-shadow:
    0 8px 30px rgba(139, 115, 85, 0.12),
    0 4px 12px rgba(139, 115, 85, 0.06);
}

.mc-post-card:hover::before {
  border-color: rgba(78, 205, 196, 0.2);
}

/* =============================================
   6. 毛氈質感搜索欄 & 工具欄
   ============================================= */
.mc-toolbar {
  background:
    var(--felt-noise),
    linear-gradient(135deg, var(--felt-warm-white), #FFF5EE);
  background-size: 200px 200px, 100% 100%;
  border: 1px solid var(--mc-border);
  border-radius: var(--mc-card-radius);
  box-shadow: var(--mc-card-shadow);
  position: relative;
}

.mc-toolbar::before {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: calc(var(--mc-card-radius) - 4px);
  border: 2px dashed rgba(180, 160, 140, 0.1);
  pointer-events: none;
}

.mc-search-input {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(180, 160, 140, 0.2);
  border-radius: 12px;
  transition: all 0.3s;
}

.mc-search-input:focus {
  background: #FFFFFF;
  border-color: #4ECDC4;
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.1);
}

.mc-sort-tab {
  border-radius: 10px;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mc-sort-tab.mc-active {
  background: linear-gradient(135deg, #4ECDC4, #44CF6C);
  color: white;
  box-shadow: 0 2px 8px rgba(78, 205, 196, 0.3);
}

.mc-sort-tab:hover:not(.mc-active) {
  background: rgba(78, 205, 196, 0.1);
}

/* =============================================
   7. 毛氈質感公告欄
   ============================================= */
.mc-announcement-bar {
  background:
    var(--felt-noise),
    linear-gradient(135deg, #FFF7ED, #FEF3C7);
  background-size: 200px 200px, 100% 100%;
  border: 1px solid #FDE68A;
  border-radius: 14px;
  position: relative;
  overflow: hidden;
}

.mc-announcement-bar::before {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 11px;
  border: 1.5px dashed rgba(253, 230, 138, 0.5);
  pointer-events: none;
}

/* =============================================
   8. 毛氈質感彈窗
   ============================================= */
.mc-modal {
  background:
    var(--felt-noise),
    linear-gradient(135deg, #FFFFFF, var(--felt-warm-white));
  background-size: 200px 200px, 100% 100%;
  border: 1px solid var(--mc-border);
  border-radius: 20px;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.15),
    0 8px 24px rgba(0, 0, 0, 0.08);
  position: relative;
  overflow: hidden;
}

.mc-modal::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 14px;
  border: 2px dashed rgba(180, 160, 140, 0.12);
  pointer-events: none;
  z-index: 1;
}

.mc-modal-header {
  border-bottom: 1px solid var(--mc-border);
  position: relative;
}

.mc-modal-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--stitch-color) 0px,
    var(--stitch-color) 6px,
    transparent 6px,
    transparent 10px
  );
}

/* =============================================
   9. 毛氈質感表單
   ============================================= */
.mc-form-input,
.mc-form-select,
.mc-form-textarea {
  background: rgba(255, 255, 255, 0.8);
  border: 1.5px solid rgba(180, 160, 140, 0.25);
  border-radius: 12px;
  transition: all 0.3s;
}

.mc-form-input:focus,
.mc-form-select:focus,
.mc-form-textarea:focus {
  background: #FFFFFF;
  border-color: #4ECDC4;
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.1);
}

.mc-editor-toolbar {
  background: rgba(245, 240, 235, 0.5);
  border: 1px solid rgba(180, 160, 140, 0.15);
  border-radius: 10px;
}

/* =============================================
   10. 小海豹圖片替代 Loading
   ============================================= */
.mc-loading {
  text-align: center;
  padding: 60px 20px;
}

.mc-loading-seal {
  width: 120px;
  height: 120px;
  margin: 0 auto 16px;
  background: url('/mujoo/assets/shared/seal-reference-cutout-v5.webp') center/contain no-repeat;
  font-size: 0;
  animation: mc-seal-bounce 2s ease-in-out infinite;
}

@keyframes mc-seal-bounce {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-10px) rotate(-3deg); }
  50% { transform: translateY(-5px) rotate(0deg); }
  75% { transform: translateY(-10px) rotate(3deg); }
}

.mc-loading p {
  color: var(--mc-text-muted);
  font-size: 14px;
  font-weight: 500;
}

/* =============================================
   11. 毛氈質感分頁
   ============================================= */
.mc-pagination {
  background:
    var(--felt-noise),
    linear-gradient(135deg, var(--felt-warm-white), #FFF5EE);
  background-size: 200px 200px, 100% 100%;
  border: 1px solid var(--mc-border);
  border-radius: 14px;
}

.mc-page-btn {
  border-radius: 10px;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mc-page-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #4ECDC4, #44CF6C);
  color: white;
  transform: translateY(-1px);
}

/* =============================================
   12. 毛氈質感 Footer
   ============================================= */
.mc-footer {
  background:
    url('/mujoo/assets/shared/community-footer-felt-v5.webp') center bottom/cover no-repeat,
    linear-gradient(0deg, var(--felt-cream), transparent);
  padding: 80px 20px 30px;
  text-align: center;
  position: relative;
  margin-top: 40px;
  min-height: 160px;
}

.mc-footer p {
  position: relative;
  z-index: 1;
  color: var(--mc-text-secondary);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.7);
  display: inline-block;
  padding: 8px 20px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
}

/* =============================================
   13. 社區橫幅
   ============================================= */
.mc-community-banner {
  width: 100%;
  max-height: 200px;
  border-radius: var(--mc-card-radius);
  overflow: hidden;
  margin-bottom: 16px;
  position: relative;
  box-shadow: var(--mc-card-shadow);
}

.mc-community-banner .mc-banner-background {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.mc-community-banner::before {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: calc(var(--mc-card-radius) - 5px);
  border: 2px dashed rgba(255, 255, 255, 0.3);
  pointer-events: none;
  z-index: 2;
}

.mc-banner-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px 24px;
  background: linear-gradient(transparent, rgba(27, 45, 79, 0.7));
  z-index: 1;
}

.mc-banner-title {
  color: white;
  font-size: 22px;
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  margin: 0;
}

.mc-banner-subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  margin: 4px 0 0;
}

/* =============================================
   14. 毛氈質感簽到
   ============================================= */
.mc-checkin-content {
  text-align: center;
}

.mc-checkin-seal {
  width: 150px;
  height: 150px;
  margin: 0 auto 16px;
  background: url('/mujoo/assets/shared/seal-reference-cutout-v5.webp') center/contain no-repeat;
  animation: mc-seal-bounce 2s ease-in-out infinite;
}

.mc-checkin-success-seal {
  width: 150px;
  height: 150px;
  margin: 0 auto 16px;
  background: url('/mujoo/assets/shared/seal-reference-cutout-v5.webp') center/contain no-repeat;
  animation: mc-seal-celebrate 1s ease-out;
}

@keyframes mc-seal-celebrate {
  0% { transform: scale(0.5) rotate(-10deg); opacity: 0; }
  50% { transform: scale(1.1) rotate(5deg); }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

/* =============================================
   15. 空狀態
   ============================================= */
.mc-empty-state {
  text-align: center;
  padding: 60px 20px;
}

.mc-empty-seal {
  width: 140px;
  height: 140px;
  margin: 0 auto 16px;
  background: url('/mujoo/assets/shared/seal-reference-cutout-v5.webp') center/contain no-repeat;
  animation: mc-seal-idle 4s ease-in-out infinite;
}

@keyframes mc-seal-idle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.mc-empty-text {
  color: var(--mc-text-muted);
  font-size: 15px;
  margin: 0;
}

.mc-empty-hint {
  color: var(--mc-text-muted);
  font-size: 13px;
  margin-top: 8px;
  opacity: 0.7;
}

/* =============================================
   16. 毛氈質感標籤
   ============================================= */
.mc-tag {
  background: linear-gradient(135deg, var(--felt-light-blue), var(--felt-lavender));
  border: 1px solid rgba(167, 139, 250, 0.2);
  border-radius: 20px;
  padding: 2px 10px;
  font-size: 12px;
  color: #6B7280;
  transition: all 0.2s;
}

.mc-tag:hover {
  background: linear-gradient(135deg, #4ECDC4, #44CF6C);
  color: white;
  border-color: transparent;
}

/* =============================================
   17. 毛氈質感用戶頭像
   ============================================= */
.mc-user-avatar,
.mc-post-avatar {
  border-radius: 50%;
  border: 2px solid rgba(180, 160, 140, 0.2);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: all 0.3s;
}

.mc-user-avatar:hover,
.mc-post-avatar:hover {
  border-color: #4ECDC4;
  box-shadow: 0 4px 12px rgba(78, 205, 196, 0.2);
  transform: scale(1.05);
}

/* =============================================
   18. 毛氈質感滾動條
   ============================================= */
#mujoo-community-app ::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

#mujoo-community-app ::-webkit-scrollbar-track {
  background: rgba(180, 160, 140, 0.05);
  border-radius: 4px;
}

#mujoo-community-app ::-webkit-scrollbar-thumb {
  background: rgba(180, 160, 140, 0.2);
  border-radius: 4px;
  transition: background 0.2s;
}

#mujoo-community-app ::-webkit-scrollbar-thumb:hover {
  background: rgba(180, 160, 140, 0.35);
}

/* =============================================
   19. 毛氈裝飾元素
   ============================================= */
.mc-felt-deco {
  position: absolute;
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
}

.mc-felt-deco-coral {
  width: 60px;
  height: 60px;
  background: url('/mujoo/community/assets/felt-corner-deco.webp') center/contain no-repeat;
}

/* =============================================
   20. 毛氈質感統計卡
   ============================================= */
.mc-stats-card {
  background: linear-gradient(135deg, var(--felt-light-blue), var(--felt-soft-pink));
  border-radius: 14px;
  border: 1px solid rgba(78, 205, 196, 0.15);
}

.mc-stat-value {
  background: linear-gradient(135deg, #4ECDC4, #3B82F6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* =============================================
   21. 毛氈質感社區守則
   ============================================= */
.mc-community-rules .mc-rules-list li {
  position: relative;
  padding-left: 8px;
  transition: all 0.2s;
}

.mc-community-rules .mc-rules-list li:hover {
  transform: translateX(4px);
  color: var(--mc-text-primary);
}

/* =============================================
   22. 帖子互動按鈕毛氈化
   ============================================= */
.mc-post-actions button,
.mc-post-action {
  border-radius: 10px;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mc-post-actions button:hover,
.mc-post-action:hover {
  background: rgba(78, 205, 196, 0.1);
  transform: translateY(-1px);
}

/* 點贊動畫 */
.mc-liked {
  animation: mc-like-pop 0.4s ease-out;
}

@keyframes mc-like-pop {
  0% { transform: scale(1); }
  30% { transform: scale(1.3); }
  60% { transform: scale(0.9); }
  100% { transform: scale(1); }
}

/* =============================================
   23. 毛氈質感簽到排行
   ============================================= */
.mc-checkin-board {
  position: relative;
}

.mc-checkin-item {
  transition: all 0.2s;
  border-radius: 10px;
}

.mc-checkin-item:hover {
  background: rgba(78, 205, 196, 0.06);
}

/* =============================================
   24. 響應式毛氈主題調整
   ============================================= */
@media (max-width: 768px) {
  .mc-community-banner {
    max-height: 140px;
    border-radius: 12px;
  }

  .mc-community-banner .mc-banner-background {
    height: 140px;
  }

  .mc-banner-title {
    font-size: 18px;
  }

  .mc-loading-seal,
  .mc-empty-seal {
    width: 100px;
    height: 100px;
  }

  .mc-checkin-seal,
  .mc-checkin-success-seal {
    width: 120px;
    height: 120px;
  }

  .mc-footer {
    padding: 60px 16px 24px;
    min-height: 120px;
  }
}

@media (max-width: 480px) {
  .mc-community-banner {
    max-height: 100px;
  }

  .mc-community-banner .mc-banner-background {
    height: 100px;
  }
}

/* =============================================
   25. 毛氈質感過渡動畫
   ============================================= */
.mc-fade-in {
  animation: mc-felt-fade-in 0.4s ease-out;
}

@keyframes mc-felt-fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mc-slide-up {
  animation: mc-felt-slide-up 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes mc-felt-slide-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 毛氈按鈕按壓回彈效果 */
.mc-btn-bounce {
  animation: mc-felt-bounce 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes mc-felt-bounce {
  0% { transform: scale(1); }
  30% { transform: scale(0.9); }
  60% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

/* =============================================
   26. 毛氈質感 Category 板塊
   ============================================= */
.mc-category-item {
  border-radius: 12px;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.mc-category-item:hover {
  background: rgba(78, 205, 196, 0.08);
  transform: translateX(4px);
}

.mc-category-item.mc-active {
  background: linear-gradient(135deg, rgba(78, 205, 196, 0.12), rgba(68, 207, 108, 0.08));
  border-left: 3px solid #4ECDC4;
}

/* =============================================
   27. 熱門帖子毛氈化
   ============================================= */
.mc-hot-post-item {
  border-radius: 10px;
  transition: all 0.2s;
}

.mc-hot-post-item:hover {
  background: rgba(78, 205, 196, 0.06);
  transform: translateX(4px);
}

/* =============================================
   28. 活躍用戶毛氈化
   ============================================= */
.mc-active-user-item {
  border-radius: 10px;
  transition: all 0.2s;
}

.mc-active-user-item:hover {
  background: rgba(78, 205, 196, 0.06);
}

/* One system character; uploaded account images keep their own cover crop. */
.mc-system-seal {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 2px;
  box-sizing: border-box;
}
.mc-uploaded-avatar {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}
.mc-active-user-avatar > .mc-system-seal { width: 24px; height: 24px; }
.mc-seal-inline {
  display: inline-block;
  width: 1.6em;
  height: 1.6em;
  object-fit: contain;
  vertical-align: middle;
}
.mc-community-banner .mc-banner-seal {
  position: absolute;
  right: 3%;
  bottom: 6px;
  width: 30%;
  height: calc(100% - 12px);
  object-fit: contain;
  pointer-events: none;
  z-index: 1;
}
.mc-community-banner .mc-banner-overlay {
  padding-right: 35%;
  z-index: 2;
}
@media (prefers-reduced-motion: reduce) {
  .mc-felt-bubbles { display: none; }
  .mc-felt-sidebar-seal img,
  .mc-loading-seal,
  .mc-empty-seal,
  .mc-checkin-seal,
  .mc-checkin-success-seal { animation: none !important; }
}
.mc-motion-paused .mc-felt-bubbles > div,
.mc-motion-paused .mc-felt-sidebar-seal img,
.mc-motion-paused .mc-loading-seal,
.mc-motion-paused .mc-empty-seal,
.mc-motion-paused .mc-checkin-seal,
.mc-motion-paused .mc-checkin-success-seal { animation-play-state: paused !important; }