/* ========================================
   Yapper Dash - Modern Twitter Dashboard
   ======================================== */

/* CSS 변수 - 다크/라이트 모드 지원 */
:root {
  /* 색상 팔레트 */
  --primary-color: #1d9bf0;
  --primary-hover: #1a8cd8;
  --primary-light: rgba(29, 155, 240, 0.1);
  --secondary-color: #536471;
  --accent-color: #00ba7c;
  --danger-color: #f91880;
  --warning-color: #ffd400;
  
  /* 텍스트 색상 */
  --text-primary: #0f1419;
  --text-secondary: #536471;
  --text-muted: #8b98a5;
  --text-white: #ffffff;
  
  /* 배경 색상 */
  --bg-primary: #ffffff;
  --bg-secondary: #f7f9fa;
  --bg-hover: rgba(0, 0, 0, 0.03);
  --bg-overlay: rgba(0, 0, 0, 0.4);
  
  /* 테두리 색상 */
  --border-color: #eff3f4;
  --border-dark: #cfd9de;
  
  /* 그림자 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.12);
  
  /* 간격 */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  /* 트랜지션 */
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 폰트 */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* 다크 모드 */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #e7e9ea;
    --text-secondary: #71767b;
    --text-muted: #4a5359;
    --bg-primary: #000000;
    --bg-secondary: #16181c;
    --bg-hover: rgba(255, 255, 255, 0.03);
    --border-color: #2f3336;
    --border-dark: #536471;
  }
}

/* 리셋 및 기본 스타일 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.modal-open {
  overflow: hidden;
}

/* ========================================
   컨테이너 및 레이아웃
   ======================================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   헤더 스타일
   ======================================== */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background-color: rgba(255, 255, 255, 0.85);
}

@media (prefers-color-scheme: dark) {
  .header {
    background-color: rgba(0, 0, 0, 0.85);
  }
}

.header-content {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.logo {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  transition: var(--transition-fast);
}

.logo:hover {
  opacity: 0.8;
}

.logo i {
  color: var(--primary-color);
  font-size: 2rem;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-left: 44px;
}

/* 통계 서머리 */
.stats-summary {
  display: flex;
  gap: 32px;
  align-items: center;
}

.stat-item {
  text-align: center;
  transition: var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-1px);
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ========================================
   메인 레이아웃
   ======================================== */
.main {
  padding: 32px 0 64px;
  min-height: calc(100vh - 200px);
}

/* 카드 스타일 */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* ========================================
   사용법 안내 섹션
   ======================================== */
.help-section {
  margin-bottom: 32px;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.help-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  transition: var(--transition-fast);
}

.help-header:hover {
  background: var(--bg-hover);
}

.help-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.help-header h2 i {
  color: var(--accent-color);
}

.help-toggle {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.help-toggle:hover {
  background: var(--bg-hover);
  color: var(--accent-color);
}

.help-content {
  padding: 0 24px 24px;
  display: none;
}

.help-content.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

.help-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.help-item {
  padding: 20px;
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition-base);
}

.help-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-color);
}

.help-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.help-item h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.help-item p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.help-item code {
  display: block;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.875rem;
  color: var(--primary-color);
  margin-bottom: 12px;
  overflow-x: auto;
}

.help-item ul {
  list-style: none;
  padding: 0;
}

.help-item ul li {
  padding: 6px 0 6px 24px;
  position: relative;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.help-item ul li:before {
  content: '•';
  position: absolute;
  left: 8px;
  color: var(--primary-color);
}

.help-item ul li strong {
  color: var(--text-primary);
  font-weight: 600;
}

.help-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.help-tag {
  padding: 6px 12px;
  background: var(--primary-light);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}

.help-note {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 12px;
}

.help-commands {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--border-color);
}

.help-commands h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.help-commands h3 i {
  color: var(--secondary-color);
}

.command-list {
  display: grid;
  gap: 12px;
}

.command-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.command-item:hover {
  background: var(--bg-hover);
  transform: translateX(4px);
}

.command-item code {
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: 600;
  flex-shrink: 0;
}

.command-item span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========================================
   필터 섹션
   ======================================== */
.filters-section {
  margin-bottom: 32px;
}

.filters-header {
  padding: 20px 24px;
  background: var(--bg-primary);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  transition: var(--transition-fast);
}

.filters-header:hover {
  background: var(--bg-hover);
}

.filters-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.filters-header h2 i {
  color: var(--primary-color);
}

.filter-toggle {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.filter-toggle:hover {
  background: var(--bg-hover);
  color: var(--primary-color);
}

.filters-content {
  padding: 24px;
  background: var(--bg-primary);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  display: block;
}

.filters-content.collapsed {
  display: none;
}

.filter-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

.filter-row:last-child {
  margin-bottom: 0;
}

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

.filter-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-group input,
.filter-group select {
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.filter-group input:focus,
.filter-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px var(--primary-light);
}

.filter-group input::placeholder {
  color: var(--text-muted);
}

/* 날짜 입력 필드 스타일 개선 */
.filter-group input[type="date"] {
  position: relative;
  background: var(--bg-primary);
  cursor: pointer;
  font-family: var(--font-primary);
  min-height: 48px;
}

/* 날짜 입력 필드의 기본 텍스트 스타일 */
.filter-group input[type="date"]::-webkit-datetime-edit-text,
.filter-group input[type="date"]::-webkit-datetime-edit-month-field,
.filter-group input[type="date"]::-webkit-datetime-edit-day-field,
.filter-group input[type="date"]::-webkit-datetime-edit-year-field {
  color: var(--text-primary);
  padding: 0.125rem;
}

/* 날짜 선택기 아이콘 스타일 */
.filter-group input[type="date"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23536471' stroke-width='2'%3E%3Crect x='3' y='4' width='18' height='18' rx='2' ry='2'%3E%3C/rect%3E%3Cline x1='16' y1='2' x2='16' y2='6'%3E%3C/line%3E%3Cline x1='8' y1='2' x2='8' y2='6'%3E%3C/line%3E%3Cline x1='3' y1='10' x2='21' y2='10'%3E%3C/line%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 20px;
  width: 36px;
  height: 36px;
  opacity: 0.8;
  transition: var(--transition-fast);
}

.filter-group input[type="date"]:hover::-webkit-calendar-picker-indicator {
  opacity: 1;
  transform: scale(1.1);
}

/* 날짜가 선택되지 않았을 때 스타일 */
.filter-group input[type="date"]:invalid,
.filter-group input[type="date"]::-webkit-datetime-edit-fields-wrapper {
  color: var(--text-secondary);
}

/* Firefox 지원 */
.filter-group input[type="date"] {
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  .filter-group input[type="date"] {
    color-scheme: dark;
  }
  
  .filter-group input[type="date"]::-webkit-calendar-picker-indicator {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23e7e9ea' stroke-width='2'%3E%3Crect x='3' y='4' width='18' height='18' rx='2' ry='2'%3E%3C/rect%3E%3Cline x1='16' y1='2' x2='16' y2='6'%3E%3C/line%3E%3Cline x1='8' y1='2' x2='8' y2='6'%3E%3C/line%3E%3Cline x1='3' y1='10' x2='21' y2='10'%3E%3C/line%3E%3C/svg%3E");
  }
}

/* 날짜 범위 선택 스타일 */
.date-range-select {
  font-weight: 500;
}

/* 커스텀 날짜 그룹 스타일 */
.date-custom-group {
  transition: var(--transition-base);
}

.date-custom-group[style*="display: none"] {
  opacity: 0;
  transform: translateY(-10px);
}

.date-custom-group[style*="display: flex"] {
  opacity: 1;
  transform: translateY(0);
  animation: fadeIn 0.3s ease-out;
}

/* 검색 컨테이너 */
.search-container {
  position: relative;
}

.search-container input {
  padding-right: 48px;
}

.search-container button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary-color);
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.search-container button:hover {
  background: var(--primary-hover);
}

/* 버튼 스타일 */
.btn {
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-dark);
}

/* ========================================
   인기 태그 섹션
   ======================================== */
.popular-tags-section {
  margin-bottom: 32px;
  padding: 24px;
}

.popular-tags-section h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.popular-tags-section h3 i {
  color: var(--primary-color);
}

.popular-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.tag-item:hover {
  background: var(--primary-light);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.tag-count {
  background: var(--bg-primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* 비활성 태그 스타일 */
.tag-item.tag-inactive {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--bg-secondary);
  border-color: var(--text-muted);
}

.tag-item.tag-inactive:hover {
  transform: none;
  box-shadow: none;
  background: var(--bg-secondary);
  border-color: var(--text-muted);
  color: var(--text-secondary);
}

.tag-item.tag-inactive .tag-count {
  color: var(--text-muted);
}

/* ========================================
   트윗 섹션
   ======================================== */
.tweets-section {
  padding: 24px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-header h2 i {
  color: var(--primary-color);
}

.view-controls select {
  padding: 8px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}

.view-controls select:hover {
  border-color: var(--border-dark);
}

.view-controls select:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* 로딩 상태 */
.loading-container {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.loading-spinner {
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.loading-spinner i {
  font-size: 2rem;
  color: var(--primary-color);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 트윗 그리드 */
.tweets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

/* 트윗 카드 */
.tweet-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.tweet-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.tweet-card:hover::before {
  transform: translateX(0);
}

.tweet-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.tweet-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tweet-date {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.tweet-content {
  margin-bottom: 16px;
}

.tweet-comment {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 12px;
  word-wrap: break-word;
}

.tweet-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tweet-tag {
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.tweet-tag:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

/* 트윗 미리보기 영역 */
.tweet-preview {
  margin: 16px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.tweet-preview-placeholder {
  position: relative;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
}

.tweet-preview-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  padding: 40px 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  min-height: 120px;
}

.tweet-preview-loading i {
  font-size: 1.5rem;
  color: var(--primary-color);
  animation: spin 1s linear infinite;
}

.btn-load-preview {
  padding: 12px 20px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-load-preview:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-load-preview:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-modal-preview {
  padding: 12px 20px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  justify-content: center;
}

.btn-modal-preview:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-modal-preview:active {
  transform: translateY(0);
}

.tweet-preview-actions {
  margin-top: 16px;
  display: flex;
  justify-content: center;
}

.tweet-preview-error {
  padding: 16px;
  text-align: center;
  background: rgba(249, 24, 128, 0.05);
  border: 1px solid rgba(249, 24, 128, 0.2);
  border-radius: var(--radius-sm);
  color: var(--danger-color);
}

.tweet-preview-error p {
  margin-bottom: 12px;
  font-size: 0.9375rem;
}

.tweet-preview-error button {
  background: var(--danger-color);
  color: white;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tweet-preview-error button:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Twitter Embed 스타일 조정 */
.tweet-preview .twitter-tweet {
  margin: 0 !important;
  max-width: 100% !important;
  width: 100% !important;
  max-height: 400px !important;
  overflow: hidden !important;
}

.tweet-preview iframe {
  border-radius: var(--radius-sm) !important;
  box-shadow: var(--shadow-sm) !important;
  max-height: 400px !important;
  width: 100% !important;
  overflow: hidden !important;
}

/* Twitter Embed 컨테이너 크기 제한 */
.tweet-preview {
  max-height: 420px;
  overflow: hidden;
  position: relative;
}

/* 트위터 위젯이 로드된 후 크기 조정 */
.tweet-preview .twitter-tweet-rendered {
  max-height: 400px !important;
  overflow-y: auto !important;
  width: 100% !important;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.tweet-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.tweet-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: var(--transition-fast);
}

.tweet-link:hover {
  opacity: 0.8;
  transform: translateX(2px);
}

/* 북마크와 공유 버튼 제거됨 */
/* .tweet-actions {
  display: flex;
  gap: 4px;
}

.tweet-action {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.tweet-action:hover {
  background: var(--bg-hover);
  color: var(--primary-color);
} */

/* 빈 상태 */
.empty-state {
  text-align: center;
  padding: 80px 20px;
}

.empty-content {
  max-width: 400px;
  margin: 0 auto;
}

.empty-content i {
  font-size: 4rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.empty-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.empty-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========================================
   페이지네이션
   ======================================== */
.pagination-container {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 12px;
  background: var(--bg-primary);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
}

.pagination-item {
  display: inline-block;
}

.pagination-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.pagination-link:hover {
  background: var(--bg-hover);
  color: var(--primary-color);
}

.pagination-item.active .pagination-link {
  background: var(--primary-color);
  color: white;
}

.pagination-item.disabled .pagination-link {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-item.disabled .pagination-link:hover {
  background: transparent;
  color: var(--text-primary);
}

/* ========================================
   푸터
   ======================================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 32px 0;
  text-align: center;
  margin-top: auto;
}

.footer p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========================================
   반응형 디자인
   ======================================== */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .stats-summary {
    width: 100%;
    justify-content: space-around;
  }

  .stat-item {
    flex: 1;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .filter-row {
    grid-template-columns: 1fr;
  }

  .tweets-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .section-header {
    flex-direction: column;
    align-items: stretch;
  }

  .tweet-card {
    padding: 16px;
  }
}

  .pagination {
    padding: 8px;
  }

  .pagination-link {
    width: 36px;
    height: 36px;
    font-size: 0.875rem;
  }

  .help-grid {
    grid-template-columns: 1fr;
  }

  .help-item code {
    font-size: 0.75rem;
    word-break: break-all;
  }

  .command-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 1.5rem;
  }

  .logo i {
    font-size: 1.75rem;
  }

  .subtitle {
    margin-left: 0;
    margin-top: 8px;
  }

  .popular-tags {
    justify-content: center;
  }

  .tweet-footer {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }

  .tweet-link {
    justify-content: center;
  }
}

/* ========================================
   애니메이션 및 효과
   ======================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tweet-card {
  animation: fadeIn 0.3s ease-out;
}

.tweet-card:nth-child(1) { animation-delay: 0.05s; }
.tweet-card:nth-child(2) { animation-delay: 0.1s; }
.tweet-card:nth-child(3) { animation-delay: 0.15s; }
.tweet-card:nth-child(4) { animation-delay: 0.2s; }
.tweet-card:nth-child(5) { animation-delay: 0.25s; }
.tweet-card:nth-child(6) { animation-delay: 0.3s; }

/* ========================================
   접근성 개선
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 포커스 스타일 */
button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ========================================
   유틸리티 클래스
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

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

.text-success {
  color: var(--accent-color);
}

.text-error {
  color: var(--danger-color);
}

.text-secondary {
  color: var(--text-secondary);
}

.hidden {
  display: none !important;
}

.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* 스크롤바 스타일 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-dark);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* 셀렉션 색상 */
::selection {
  background: var(--primary-light);
  color: var(--primary-color);
}

/* 에러 메시지 스타일 */
.error-message {
  padding: 40px;
  text-align: center;
}

.error-message i {
  font-size: 3rem;
  color: var(--danger-color);
  margin-bottom: 16px;
}

.error-message p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ========================================
   트윗 미리보기 모달
   ======================================== */
.tweet-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
}

.tweet-modal.active {
  display: flex;
  opacity: 1;
  visibility: visible;
}

.tweet-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
}

.tweet-modal-container {
  position: relative;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transform: scale(0.9);
  transition: var(--transition-base);
}

.tweet-modal.active .tweet-modal-container {
  transform: scale(1);
}

.tweet-modal-header {
  padding: 20px 24px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.tweet-modal-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tweet-modal-title i {
  color: var(--primary-color);
  font-size: 1.5rem;
}

.tweet-modal-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-nav-btn,
.modal-close-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  font-size: 1rem;
}

.modal-nav-btn:hover,
.modal-close-btn:hover {
  background: var(--bg-hover);
  color: var(--primary-color);
}

.modal-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.modal-nav-btn:disabled:hover {
  background: transparent;
  color: var(--text-secondary);
}

.modal-close-btn {
  margin-left: 8px;
}

.modal-close-btn:hover {
  background: rgba(249, 24, 128, 0.1);
  color: var(--danger-color);
}

.tweet-modal-content {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: calc(90vh - 80px);
  max-height: 600px;
  overflow: hidden;
}

.tweet-modal-info {
  padding: 24px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
}

.tweet-user-info {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.tweet-user-avatar {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.tweet-user-details {
  flex: 1;
  min-width: 0;
}

.tweet-user-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.tweet-modal-info .tweet-date {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.tweet-modal-info .tweet-comment {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding: 16px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.tweet-modal-info .tweet-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tweet-modal-info .tweet-tag {
  padding: 6px 12px;
  background: var(--primary-light);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.tweet-modal-info .tweet-tag:hover {
  background: var(--primary-color);
  color: white;
}

.modal-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  margin: 0 8px 8px 0;
  border: 1px solid var(--primary-color);
  transition: var(--transition-fast);
}

.modal-tag:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

.tweet-actions {
  margin-top: auto;
}

.tweet-original-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: var(--transition-fast);
  width: 100%;
  justify-content: center;
}

.tweet-original-link:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.tweet-embed-container {
  padding: 24px;
  background: var(--bg-primary);
  overflow-y: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.tweet-embed-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.tweet-embed-loading i {
  font-size: 2rem;
  color: var(--primary-color);
}

/* 모달 내 Twitter Embed 스타일 */
.tweet-embed-container .twitter-tweet {
  margin: 0 !important;
  max-width: 100% !important;
  width: 100% !important;
}

.tweet-embed-container iframe {
  border-radius: var(--radius-sm) !important;
  max-height: none !important;
}

/* 반응형 모달 */
@media (max-width: 768px) {
  .tweet-modal-container {
    width: 95%;
    max-height: 95vh;
  }
  
  .tweet-modal-content {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  
  .tweet-modal-info {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 20px;
  }
  
  .tweet-embed-container {
    padding: 20px;
  }
  
  .tweet-modal-header {
    padding: 16px 20px;
  }
  
  .modal-nav-btn {
    display: none; /* 모바일에서는 네비게이션 버튼 숨김 */
  }
}