/* IU Community - Clean & Readable Dark Mode UI */

/* ===== CSS Variables ===== */
:root {
  --primary: #9779ea;
  --primary-light: #C4B5E0;
  --primary-dark: #7B5DC4;
  --accent-gold: #D4AF37;
  --bg-oled: #0A0A0F;
  --bg-dark: #12121A;
  --bg-card: rgba(20, 20, 35, 0.9);
  --text-primary: #F5F5F7;
  --text-secondary: #C8C8D8;
  --text-muted: #7B7B9A;
  --border-subtle: rgba(151, 126, 234, 0.15);
  --border-visible: rgba(151, 126, 234, 0.3);
  --glow-soft: rgba(151, 126, 234, 0.2);
  --glow-strong: rgba(151, 126, 234, 0.35);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-oled);
  background-image:
    radial-gradient(ellipse at top left, rgba(151, 126, 234, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(123, 93, 196, 0.04) 0%, transparent 50%);
  color: var(--text-primary);
  font-family: 'Noto Sans SC', 'Noto Sans KR', -apple-system, sans-serif;
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Masonry Grid ===== */
.masonry-grid {
  column-count: 2;
  column-gap: 20px;
}

@media (max-width: 600px) {
  .masonry-grid {
    column-count: 1;
  }
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 20px;
  width: 100%;
}

/* ===== Header ===== */
.header {
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

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

.logo img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  object-fit: cover;
  box-shadow: 0 0 20px var(--glow-soft);
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary-light);
}

.lang-switcher {
  display: flex;
  gap: 4px;
  background: rgba(151, 126, 234, 0.1);
  padding: 4px 8px;
  border-radius: 20px;
}

.lang-btn {
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 16px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--text-primary);
  background: rgba(151, 126, 234, 0.15);
}

.lang-btn.active {
  background: var(--primary);
  color: white;
}

/* ===== Stats Bar ===== */
.stats-bar {
  background: rgba(18, 18, 26, 0.7);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}

.stats-content {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.stat-value {
  color: var(--primary-light);
  font-weight: 700;
  font-size: 1.1rem;
}

/* ===== Fans Wall ===== */
.fans-wall {
  padding: 20px 0;
}

.fans-wall-content {
  display: flex;
  gap: 10px;
  padding: 0 4px;
  flex-wrap: wrap;
  justify-content: center;
}

.fan-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid var(--border-subtle);
  transition: all var(--transition-normal);
  position: relative;
  background: var(--bg-dark);
}

.fan-avatar:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--glow-soft);
}

.fan-avatar.selected {
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--glow-strong);
}

.fan-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.fan-avatar img.loaded {
  opacity: 1;
}

.fan-avatar .reply-count {
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 10px;
  font-weight: 700;
}

.fans-wall-more {
  display: flex;
  justify-content: center;
  margin-top: 16px;
}

.fans-more-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: rgba(151, 126, 234, 0.1);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.fans-more-btn:hover {
  background: rgba(151, 126, 234, 0.15);
  border-color: var(--primary);
  color: var(--text-primary);
}

.fans-more-btn .more-icon {
  transition: transform var(--transition-fast);
  font-size: 0.7rem;
}

/* ===== Navigation Tabs ===== */
.nav-tabs {
  display: flex;
  justify-content: center;
  padding: 16px 0;
  gap: 8px;
}

.nav-tab {
  padding: 10px 20px;
  border: 1px solid var(--border-subtle);
  background: rgba(20, 20, 35, 0.6);
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-tab:hover {
  background: rgba(151, 126, 234, 0.1);
  border-color: var(--border-visible);
  color: var(--text-primary);
}

.nav-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ===== Controls ===== */
.controls {
  display: flex;
  gap: 12px;
  padding: 16px 0;
  flex-wrap: wrap;
  align-items: center;
}

.search-box {
  flex: 1;
  min-width: 200px;
  max-width: 350px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 10px 14px 10px 38px;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  background: rgba(20, 20, 35, 0.7);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(151, 126, 234, 0.1);
}

.search-box::before {
  content: "🔍";
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  opacity: 0.5;
}

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

.filter-btn {
  padding: 8px 14px;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  background: rgba(20, 20, 35, 0.6);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--border-visible);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ===== Reply Card ===== */
.reply-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.reply-card:hover {
  border-color: var(--border-visible);
  box-shadow: var(--shadow-card);
}

.reply-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(151, 126, 234, 0.05);
  border-bottom: 1px solid var(--border-subtle);
}

.reply-card-avatar-wrapper {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  flex-shrink: 0;
  overflow: hidden;
  border: 2px solid var(--border-subtle);
  background: var(--bg-dark);
}

.reply-card-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.reply-card-avatar.loaded {
  opacity: 1;
}

.reply-card-avatar-fallback {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-muted);
  border: 2px solid var(--border-subtle);
  background: var(--bg-dark);
}

.reply-card-author {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.reply-card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Reply Card Body */
.reply-card-body {
  padding: 14px 16px;
}

/* Fan Comment Box */
.fan-comment-box {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 12px;
  border-left: 3px solid var(--text-muted);
}

.reply-card:hover .fan-comment-box {
  border-left-color: var(--accent-gold);
}

.fan-comment-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

/* IU Reply Box */
.iu-reply-box {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.iu-reply-avatar-wrapper {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-dark);
  box-shadow: 0 0 12px var(--glow-soft);
}

.iu-reply-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.iu-reply-avatar.loaded {
  opacity: 1;
}

.iu-reply-content-wrapper {
  flex: 1;
}

.iu-reply-bubble {
  background: rgba(151, 126, 234, 0.1);
  border-radius: 14px;
  border-top-left-radius: 4px;
  padding: 12px 14px;
  border: 1px solid rgba(151, 126, 234, 0.15);
}

.iu-reply-header-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.iu-reply-name {
  font-weight: 700;
  color: var(--primary-light);
  font-size: 0.9rem;
}

.iu-reply-badge {
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: white;
}

.iu-reply-to {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.iu-reply-to::before {
  content: "·";
  margin-right: 4px;
}

.iu-reply-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: auto;
}

.iu-reply-text {
  color: var(--text-primary);
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

/* ===== Images Grid ===== */
.images-grid {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.images-grid.grid-cols-1 { grid-template-columns: 1fr; }
.images-grid.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.images-grid.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 600px) {
  .images-grid.grid-cols-2.md\:grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

.image-thumbnail {
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  position: relative;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-thumbnail:hover {
  border-color: var(--primary);
}

.image-thumbnail img {
  max-width: 100%;
  max-height: 280px;
  object-fit: contain;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.image-thumbnail img.loaded {
  opacity: 1;
}

.image-thumbnail .image-loading {
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.image-thumbnail img.loaded + .image-loading {
  display: none;
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 30px 0;
}

.page-btn {
  min-width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.page-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--text-primary);
}

.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ===== Loading & Empty ===== */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 14px;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 14px;
  opacity: 0.4;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: rgba(18, 18, 26, 0.6);
  padding: 40px 20px;
  margin-top: 40px;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-qr {
  width: 120px;
  border-radius: 10px;
  border: 2px solid var(--border-subtle);
}

.footer-qr:hover {
  border-color: var(--primary);
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.5;
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.75rem;
  opacity: 0.6;
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

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

.modal-content {
  max-width: 90vw;
  max-height: 90vh;
}

.modal-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal-content img.loaded {
  opacity: 1;
}

.modal-image-loading {
  position: absolute;
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 2rem;
  cursor: pointer;
  width: 40px;
  height: 40px;
}

.modal-close:hover {
  color: var(--text-primary);
}

/* ===== Post Card ===== */
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.post-card:hover {
  border-color: var(--border-visible);
  box-shadow: var(--shadow-card);
}

.post-card-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.post-card-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.post-card-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-weight: 700;
  border: 2px solid var(--border-subtle);
  overflow: hidden;
}

.post-card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.post-card-avatar img.loaded {
  opacity: 1;
}

.post-card-author-name {
  font-weight: 700;
  color: var(--primary-light);
  font-size: 0.9rem;
}

.post-card-board-badge {
  padding: 3px 8px;
  background: rgba(151, 126, 234, 0.1);
  border-radius: 8px;
  font-size: 0.75rem;
  color: var(--primary-light);
  margin-left: 8px;
}

.post-card-time {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.post-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
  line-height: 1.3;
}

.post-card-content {
  color: var(--text-secondary);
  white-space: pre-wrap;
  line-height: 1.5;
  font-size: 0.9rem;
}

.post-card-stats {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Post Card Comments */
.post-card-comments {
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.15);
}

.post-card-toggle-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(20, 20, 35, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.post-card-toggle-btn:hover {
  background: rgba(151, 126, 234, 0.1);
  color: var(--text-primary);
}

.post-card-toggle-icon {
  color: var(--primary);
  transition: transform var(--transition-fast);
  font-size: 0.75rem;
}

.post-card-toggle-icon.expanded {
  transform: rotate(180deg);
}

/* Comment Card */
.comment-card {
  margin-bottom: 12px;
}

.comment-card-fan {
  padding: 14px;
  background: rgba(20, 20, 35, 0.5);
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
}

.comment-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.comment-card-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
}

.comment-card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.comment-card-avatar img.loaded {
  opacity: 1;
}

.comment-card-author {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.85rem;
}

.comment-card-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.comment-card-content {
  color: var(--text-secondary);
  white-space: pre-wrap;
  font-size: 0.85rem;
  line-height: 1.5;
}

.comment-card-images {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.comment-card-images .comment-image-wrapper {
  position: relative;
  width: 80px;
  height: 80px;
}

.comment-card-images img {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  object-fit: cover;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  opacity: 0;
}

.comment-card-images img.loaded {
  opacity: 1;
}

.comment-card-images img:hover {
  border-color: var(--primary);
}

.comment-card-images .comment-image-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.comment-card-images img.loaded + .comment-image-loading {
  display: none;
}

/* IU Reply Thread */
.iu-reply-thread {
  margin-top: 10px;
  padding-left: 20px;
  position: relative;
}

.thread-line {
  position: absolute;
  left: 8px;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), transparent);
}

.iu-comment-reply {
  padding: 14px;
  background: rgba(151, 126, 234, 0.08);
  border-radius: 0 10px 10px 0;
  border: 1px solid rgba(151, 126, 234, 0.12);
  border-left: 3px solid var(--primary);
}

.iu-comment-reply-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.iu-comment-reply-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-dark);
  box-shadow: 0 0 10px var(--glow-soft);
}

.iu-comment-reply-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.iu-comment-reply-avatar img.loaded {
  opacity: 1;
}

.iu-comment-reply-name .iu-name {
  font-weight: 700;
  color: var(--primary-light);
  font-size: 0.85rem;
}

.iu-comment-reply-name .reply-label {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.iu-comment-reply-name .reply-target {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.85rem;
}

.iu-comment-reply-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.iu-comment-reply-content {
  color: var(--text-secondary);
  white-space: pre-wrap;
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ===== Animations ===== */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.fade-in {
  opacity: 0;
  animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

/* ===== Skeleton Loading ===== */
.skeleton {
  background: linear-gradient(90deg, var(--bg-dark) 25%, rgba(151, 126, 234, 0.08) 50%, var(--bg-dark) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 14px 16px;
}

.skeleton-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.skeleton-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

.skeleton-author {
  width: 120px;
  height: 18px;
}

.skeleton-date {
  width: 60px;
  height: 14px;
  margin-top: 6px;
}

.skeleton-body {
  padding: 12px 14px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  margin-bottom: 12px;
}

.skeleton-text {
  height: 16px;
  margin-bottom: 8px;
}

.skeleton-text:last-child {
  width: 70%;
  margin-bottom: 0;
}

.skeleton-reply {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.skeleton-reply-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
}

.skeleton-reply-bubble {
  flex: 1;
  padding: 12px 14px;
  background: rgba(151, 126, 234, 0.1);
  border-radius: 14px;
  border-top-left-radius: 4px;
}

.skeleton-grid {
  column-count: 2;
  column-gap: 20px;
}

@media (max-width: 600px) {
  .skeleton-grid {
    column-count: 1;
  }
}

.skeleton-grid-item {
  break-inside: avoid;
  margin-bottom: 20px;
}

/* ===== Back to Top Button ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--primary);
  border: none;
  border-radius: 50%;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  box-shadow: 0 4px 20px var(--glow-strong);
  z-index: 90;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--glow-strong);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 600px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}

/* ===== Enhanced Image Viewer ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
}

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

/* Top bar - fixed */
.modal-top-bar {
  position: fixed;
  top: 50px;
  left: 20px;
  right: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.85);
  z-index: 1002;
  backdrop-filter: blur(8px);
  border-radius: 16px;
}

.modal-controls {
  display: flex;
  gap: 8px;
}

.modal-btn {
  background: var(--primary);
  border: none;
  border-radius: 20px;
  padding: 10px 18px;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.modal-btn:hover {
  background: var(--primary-light);
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(151, 126, 234, 0.4);
}

.modal-btn svg {
  width: 16px;
  height: 16px;
}

.modal-close {
  background: rgba(255, 100, 100, 0.9);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: white;
  font-size: 2rem;
  cursor: pointer;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  border-radius: 50%;
  line-height: 1;
  box-shadow: 0 4px 20px rgba(255, 100, 100, 0.4);
  font-weight: 300;
}

.modal-close:hover {
  background: #ff4444;
  transform: scale(1.15) rotate(90deg);
  box-shadow: 0 6px 25px rgba(255, 68, 68, 0.5);
}

/* Main content area */
.modal-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 130px 60px 60px;
  overflow: auto;
}

.modal-image-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.modal-content img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 8px;
  opacity: 0;
  transition: opacity var(--transition-normal), transform 0.15s ease;
  cursor: zoom-in;
}

.modal-content img.loaded {
  opacity: 1;
}

.modal-content img.zoomed {
  cursor: zoom-out;
  max-width: none;
  max-height: none;
}

.modal-image-loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Navigation buttons - fixed */
.modal-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary);
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: white;
  z-index: 1001;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.modal-nav:hover {
  background: var(--primary-light);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 20px rgba(151, 126, 234, 0.5);
}

.modal-nav.prev {
  left: 16px;
}

.modal-nav.next {
  right: 16px;
}

.modal-nav svg {
  width: 22px;
  height: 22px;
}

@media (max-width: 600px) {
  .modal-nav {
    width: 40px;
    height: 40px;
  }
  .modal-nav.prev {
    left: 8px;
  }
  .modal-nav.next {
    right: 8px;
  }
  .modal-content {
    padding: 70px 50px;
  }
  .modal-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
  .modal-btn span {
    display: none;
  }
}

/* Bottom bar - fixed */
.modal-info {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  padding: 16px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  z-index: 1002;
}

.modal-counter {
  color: var(--primary-light);
  font-weight: 600;
  font-size: 0.9rem;
}

/* ===== Infinite Scroll Loading ===== */
.infinite-loading {
  display: flex;
  justify-content: center;
  padding: 30px 0;
}

.infinite-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.infinite-end {
  text-align: center;
  padding: 30px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .header-content {
    flex-wrap: wrap;
    gap: 10px;
  }

  .logo img {
    width: 40px;
    height: 40px;
  }

  .nav-tabs {
    flex-wrap: wrap;
    gap: 6px;
    padding: 12px 10px;
  }

  .controls {
    flex-direction: column;
    gap: 10px;
  }

  .search-box {
    max-width: none;
  }

  .pagination {
    gap: 4px;
  }

  .page-btn {
    min-width: 34px;
    height: 34px;
    font-size: 0.85rem;
  }

  .reply-card-header,
  .reply-card-body,
  .post-card-header,
  .post-card-comments {
    padding: 12px;
  }

  .iu-reply-bubble {
    padding: 10px 12px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 14px;
  }

  .fan-avatar {
    width: 44px;
    height: 44px;
  }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}