/* ==========================================================================
   04 DB 관리자 전용 대시보드 스타일시트 (Vanilla CSS)
   - 모던 다크 테마 / 인디고 & 바이올렛 포인트
   - 반응형 디자인 및 부드러운 아코디언 인터랙션
   ========================================================================== */

:root {
  --bg-main: #0a0e17;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --bg-surface: #131c2e;
  --bg-input: rgba(15, 23, 42, 0.8);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.25);
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border-subtle);
  --shadow-elevated: 0 20px 40px -15px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(99, 102, 241, 0.3);
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* 앰비언트 글로우 배경 */
.ambient-glow-1 {
  position: fixed;
  top: -150px;
  left: 30%;
  width: 600px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.05) 50%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-2 {
  position: fixed;
  bottom: -200px;
  right: 15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

/* 전체 컨테이너 */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1300px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ==========================================================================
   로그인 뷰 (Login View)
   ========================================================================== */
.login-wrapper {
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  box-shadow: var(--shadow-card);
  animation: fadeIn 0.4s ease-out;
  text-align: center;
}

.login-icon-box {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.2));
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 28px;
  box-shadow: 0 8px 24px var(--primary-glow);
}

.login-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.form-group {
  text-align: left;
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-sub);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn-submit {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 6px 20px var(--primary-glow);
  margin-top: 24px;
}

.btn-submit:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

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

/* ==========================================================================
   대시보드 헤더 & 네비게이션
   ========================================================================== */
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 24px;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.2));
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
}

.brand-title-wrap h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-sub);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: #34d399;
}

.status-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.btn-header {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-header:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

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

.btn-header.primary:hover {
  background: var(--primary-hover);
}

.btn-header.danger {
  color: #f87171;
}

.btn-header.danger:hover {
  background: var(--danger-bg);
  border-color: rgba(239, 68, 68, 0.4);
}

/* ==========================================================================
   보안 경고 배너 (기본 비밀번호 사용 시)
   ========================================================================== */
.alert-banner {
  background: linear-gradient(90deg, rgba(245, 158, 11, 0.15), rgba(239, 68, 68, 0.15));
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  animation: slideDown 0.3s ease-out;
}

.alert-content {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: #fef08a;
}

.alert-content strong {
  color: #fff;
}

.btn-alert-action {
  padding: 6px 14px;
  background: #f59e0b;
  color: #0f172a;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.btn-alert-action:hover {
  background: #fbbf24;
  transform: translateY(-1px);
}

/* ==========================================================================
   개요 통계 카드 그리드 (Overview Stats)
   ========================================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.3);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: rgba(255, 255, 255, 0.04);
}

.stat-info .stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.stat-info .stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.stat-info .stat-sub {
  font-size: 11px;
  color: var(--text-sub);
  margin-top: 2px;
}

/* ==========================================================================
   필터 & 컨트롤 툴바
   ========================================================================== */
.toolbar-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.search-box {
  position: relative;
  flex: 1;
  max-width: 400px;
  min-width: 240px;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 38px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 13px;
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 15px;
  pointer-events: none;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   SQL 콘솔 패널 (Collapsible)
   ========================================================================== */
.sql-console-panel {
  background: var(--bg-card);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-card);
  display: none;
  animation: fadeIn 0.3s ease-out;
}

.sql-console-panel.active {
  display: block;
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.console-title {
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #a5b4fc;
}

.snippet-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.snippet-chip {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: #cbd5e1;
  font-size: 11px;
  font-family: monospace;
  cursor: pointer;
  transition: var(--transition);
}

.snippet-chip:hover {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--primary);
  color: white;
}

.sql-editor-textarea {
  width: 100%;
  height: 90px;
  padding: 12px;
  background: #090d16;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: #38bdf8;
  font-family: 'Consolas', 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  outline: none;
  transition: var(--transition);
  margin-bottom: 12px;
}

.sql-editor-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.console-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.sql-result-container {
  margin-top: 16px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

/* ==========================================================================
   테이블 목록 아코디언 카드 (핵심 기능)
   ========================================================================== */
.table-list-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.table-card:hover {
  border-color: rgba(99, 102, 241, 0.35);
}

.table-card.expanded {
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: var(--shadow-elevated);
}

/* 테이블 카드 헤더 (토글 버튼) */
.table-header {
  padding: 16px 20px;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.2s ease;
  gap: 16px;
}

.table-header:hover {
  background-color: var(--bg-card-hover);
}

.table-title-area {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.table-type-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #818cf8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.table-name-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: -0.01em;
}

.table-comment-text {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 1px;
}

.table-meta-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.meta-badge {
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-sub);
}

.meta-badge.rows {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.25);
  color: #34d399;
}

.meta-badge.size {
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.25);
  color: #22d3ee;
}

.meta-badge.engine {
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.25);
  color: #a78bfa;
}

.toggle-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.toggle-chevron {
  width: 20px;
  height: 20px;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--text-sub);
}

.table-card.expanded .toggle-chevron {
  transform: rotate(180deg);
  color: var(--primary);
}

/* 테이블 카드 본문 (아코디언 토글 상세 영역) */
.table-body {
  display: none;
  border-top: 1px solid var(--border-subtle);
  background: #0d131f;
  animation: slideDown 0.25s ease-out;
}

.table-card.expanded .table-body {
  display: block;
}

/* 서브 탭 네비게이션 */
.subtabs-bar {
  display: flex;
  gap: 4px;
  padding: 12px 20px 0;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.2);
  overflow-x: auto;
}

.subtab-btn {
  padding: 8px 16px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-sub);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.subtab-btn:hover {
  color: var(--text-main);
}

.subtab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.subtab-content {
  padding: 20px;
}

/* ==========================================================================
   스키마 탭 (컬럼 및 구조 표)
   ========================================================================== */
.schema-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.6);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.data-table th {
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-sub);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: #e2e8f0;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* 키 뱃지 (Key Badges) */
.key-badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  font-family: monospace;
}

.key-badge.pri {
  background: #eab308;
  color: #000;
}

.key-badge.uni {
  background: #06b6d4;
  color: #000;
}

.key-badge.mul {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.4);
}

.null-badge.yes {
  color: var(--text-muted);
}

.null-badge.no {
  color: #f87171;
  font-weight: 600;
}

/* ==========================================================================
   데이터 레코드 탭 (Data Records)
   ========================================================================== */
.data-tab-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.data-tab-info {
  font-size: 13px;
  color: var(--text-sub);
}

.data-tab-info strong {
  color: var(--text-main);
}

.pagination-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-page {
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-page:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

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

.page-indicator {
  font-size: 12px;
  color: var(--text-sub);
  padding: 0 4px;
}

.cell-content-truncate {
  max-width: 250px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

.cell-null {
  color: #64748b;
  font-style: italic;
  font-size: 11px;
}

/* ==========================================================================
   테이블 도구 및 작업 (Operations)
   ========================================================================== */
.operations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.op-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.op-icon {
  font-size: 20px;
}

.op-title {
  font-size: 14px;
  font-weight: 600;
}

.op-desc {
  font-size: 12px;
  color: var(--text-sub);
  margin-bottom: 14px;
  line-height: 1.4;
}

.btn-op {
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-op:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn-op.danger {
  background: var(--danger-bg);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.btn-op.danger:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: var(--danger);
}

/* ==========================================================================
   DDL 코드 뷰어
   ========================================================================== */
.ddl-container {
  position: relative;
  background: #090d16;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
}

.ddl-code {
  font-family: 'Consolas', 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.6;
  color: #38bdf8;
  white-space: pre-wrap;
  word-break: break-all;
}

.btn-copy-ddl {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-copy-ddl:hover {
  background: var(--primary);
}

/* ==========================================================================
   모달 팝업 (비밀번호 변경 / 셀 상세 / 확인창)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 30px 24px;
  box-shadow: var(--shadow-elevated);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.modal-overlay.active .modal-card {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: var(--transition);
}

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

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

/* ==========================================================================
   토스트 알림 (Toast Notifications)
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 12px 18px;
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: white;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.2s ease, transform 0.2s ease;
  max-width: 380px;
}

.toast.success {
  border-color: rgba(16, 185, 129, 0.4);
}

.toast.error {
  border-color: rgba(239, 68, 68, 0.4);
}

.toast.toast-out {
  opacity: 0;
  transform: translateY(10px);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   반응형 미디어 쿼리
   ========================================================================== */
@media (max-width: 768px) {
  .app-container {
    padding: 16px 12px 40px;
  }

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

  .header-actions {
    width: 100%;
    justify-content: flex-start;
  }

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

  .table-meta-badges {
    width: 100%;
  }

  .toggle-indicator {
    width: 100%;
    justify-content: flex-end;
  }

  .data-tab-controls {
    flex-direction: column;
    align-items: flex-start;
  }
}