/* ========================================
   KAI Call Center Admin - Modern UI Theme
   ======================================== */

/* CSS Variables - Design Tokens */
:root {
  /* Colors - Neutral Slate Palette */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  /* Primary - Indigo */
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-300: #a5b4fc;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;

  /* Semantic Colors */
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --error: #ef4444;
  --error-light: #fee2e2;
  --info: #3b82f6;
  --info-light: #dbeafe;

  /* Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
  --header-height: 64px;
  --content-max-width: 1600px;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

/* ========================================
   Base Styles
   ======================================== */

* {
  box-sizing: border-box;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--slate-100);
  color: var(--slate-700);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Heading Scale (컴팩트) */
h1 { font-size: 1.6rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.1rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

/* ========================================
   Layout - Wrapper
   ======================================== */

.wrapper {
  display: flex;
  min-height: 100vh;
}

/* ========================================
   Sidebar
   ======================================== */

.sidebar {
  width: var(--sidebar-width);
  background: var(--slate-900);
  min-height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: width var(--transition-slow);
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-header h5 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.02em;
}

.sidebar-header i {
  font-size: 20px;
  color: var(--primary-400);
}

/* Sidebar Navigation */
.sidebar-nav {
  list-style: none;
  padding: 16px 12px;
  margin: 0;
  flex: 1;
  overflow-y: auto;
}

.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: var(--slate-700);
  border-radius: 4px;
}

.nav-item {
  margin-bottom: 2px;
}

.nav-section {
  padding: 20px 12px 8px;
  color: var(--slate-500);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  color: var(--slate-400);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-size: 13px;
  font-weight: 500;
  gap: 12px;
}

.nav-link i {
  font-size: 18px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  text-decoration: none;
}

.nav-link.active {
  background: var(--primary-600);
  color: #fff;
}

.nav-link.active i {
  color: var(--primary-200);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-dropdown {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--slate-300);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  font-size: 13px;
  font-weight: 500;
}

.user-dropdown:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  text-decoration: none;
}

.user-dropdown i {
  font-size: 24px;
}

.user-dropdown::after {
  margin-left: auto;
  opacity: 0.5;
}

.sidebar-footer .dropdown-menu {
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 180px;
}

.sidebar-footer .dropdown-item {
  color: var(--slate-300);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.sidebar-footer .dropdown-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.sidebar-footer .dropdown-item i {
  margin-right: 8px;
  width: 16px;
}

.sidebar-footer .dropdown-divider {
  border-color: var(--slate-700);
  margin: 6px 0;
}

/* ========================================
   Main Content Area
   ======================================== */

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  background: var(--slate-100);
  display: flex;
  flex-direction: column;
}

.content-header {
  background: #fff;
  padding: 20px 32px;
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.content-header h4 {
  font-size: 20px;
  font-weight: 700;
  color: var(--slate-800);
  margin: 0;
  letter-spacing: -0.02em;
}

.content-header small,
.content-header .text-muted {
  color: var(--slate-500) !important;
  font-size: 13px;
  margin-top: 4px;
}

.content-body {
  padding: 24px 32px;
  flex: 1;
  max-width: var(--content-max-width);
}

/* ========================================
   Cards
   ======================================== */

.card {
  background: #fff;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  overflow: hidden;
}

.card-header {
  background: #fff;
  border-bottom: 1px solid var(--slate-100);
  padding: 16px 20px;
  font-weight: 600;
  color: var(--slate-800);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h5,
.card-header .card-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--slate-800);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header h5 i {
  color: var(--primary-500);
  font-size: 16px;
}

.card-body {
  padding: 20px;
}

.card-footer {
  background: var(--slate-50);
  border-top: 1px solid var(--slate-100);
  padding: 16px 20px;
}

/* Metric Cards */
.metric-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  transition: all var(--transition-normal);
  border: 1px solid var(--slate-100);
}

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

.metric-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.metric-icon.primary {
  background: var(--primary-100);
  color: var(--primary-600);
}

.metric-icon.success {
  background: var(--success-light);
  color: var(--success);
}

.metric-icon.warning {
  background: var(--warning-light);
  color: var(--warning);
}

.metric-icon.error {
  background: var(--error-light);
  color: var(--error);
}

.metric-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--slate-800);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.metric-label {
  font-size: 13px;
  color: var(--slate-500);
  font-weight: 500;
  margin-top: 4px;
}

.metric-change {
  font-size: 12px;
  font-weight: 600;
  margin-top: 8px;
}

.metric-change.positive { color: var(--success); }
.metric-change.negative { color: var(--error); }

/* Stat Cards (Dashboard) */
.stat-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid var(--slate-100);
  overflow: hidden;
}

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

.stat-card .card-body {
  padding: 24px;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--slate-800);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 13px;
  color: var(--slate-500);
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
}

.stat-icon {
  font-size: 48px;
  opacity: 0.15;
  position: absolute;
  right: 20px;
  top: 20px;
  color: var(--slate-600);
}

/* ========================================
   Tables
   ======================================== */

.table {
  margin-bottom: 0;
  font-size: 0.8rem;
}

.table th {
  background: var(--slate-50);
  font-weight: 600;
  color: var(--slate-600);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 12px 16px;
  border-bottom: 1px solid var(--slate-200);
  border-top: none;
  white-space: nowrap;
}

.table td {
  padding: 14px 16px;
  vertical-align: middle;
  border-bottom: 1px solid var(--slate-100);
  color: var(--slate-700);
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: var(--slate-50);
}

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

.table-responsive {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ========================================
   Badges
   ======================================== */

.badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 20px;
  letter-spacing: 0.02em;
}

.badge.bg-primary { background: var(--primary-500) !important; }
.badge.bg-success { background: var(--success) !important; }
.badge.bg-warning { background: var(--warning) !important; color: var(--slate-800) !important; }
.badge.bg-danger { background: var(--error) !important; }
.badge.bg-info { background: var(--info) !important; }
.badge.bg-secondary { background: var(--slate-400) !important; }

.badge.bg-light {
  background: var(--slate-100) !important;
  color: var(--slate-600) !important;
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-badge.active::before { background: var(--success); }
.status-badge.pending::before { background: var(--warning); }
.status-badge.completed::before { background: var(--primary-500); }
.status-badge.failed::before { background: var(--error); }

/* ========================================
   Buttons
   ======================================== */

.btn {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
}

.btn i {
  font-size: 16px;
}

.btn-sm {
  font-size: 12px;
  padding: 6px 12px;
}

.btn-sm i {
  font-size: 14px;
}

.btn-lg {
  font-size: 0.9rem;
  padding: 12px 24px;
}

.btn-primary {
  background: var(--primary-600);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-700);
  color: #fff;
}

.btn-secondary {
  background: var(--slate-100);
  color: var(--slate-700);
}

.btn-secondary:hover {
  background: var(--slate-200);
  color: var(--slate-800);
}

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-danger {
  background: var(--error);
  color: #fff;
}

.btn-warning {
  background: var(--warning);
  color: var(--slate-800);
}

.btn-outline-primary {
  background: transparent;
  border: 1px solid var(--primary-500);
  color: var(--primary-600);
}

.btn-outline-primary:hover {
  background: var(--primary-600);
  color: #fff;
}

.btn-outline-secondary {
  background: transparent;
  border: 1px solid var(--slate-300);
  color: var(--slate-600);
}

.btn-outline-secondary:hover {
  background: var(--slate-100);
  border-color: var(--slate-400);
}

.btn-light {
  background: rgba(255, 255, 255, 0.9);
  color: var(--slate-700);
  backdrop-filter: blur(4px);
}

.btn-light:hover {
  background: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--slate-600);
}

.btn-ghost:hover {
  background: var(--slate-100);
}

/* ========================================
   Forms
   ======================================== */

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-bottom: 6px;
}

.form-control,
.form-select {
  font-size: 0.8rem;
  padding: 10px 14px;
  border: 1px solid var(--slate-300);
  border-radius: var(--radius-md);
  color: var(--slate-700);
  background: #fff;
  transition: all var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  outline: none;
}

.form-control::placeholder {
  color: var(--slate-400);
}

.form-control-sm,
.form-select-sm {
  font-size: 13px;
  padding: 8px 12px;
}

.form-text {
  font-size: 12px;
  color: var(--slate-500);
  margin-top: 6px;
}

.input-group {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.input-group-text {
  background: var(--slate-50);
  border: 1px solid var(--slate-300);
  color: var(--slate-500);
  font-size: 14px;
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

/* Form Check */
.form-check-input {
  width: 18px;
  height: 18px;
  border: 2px solid var(--slate-300);
  border-radius: 4px;
}

.form-check-input:checked {
  background-color: var(--primary-600);
  border-color: var(--primary-600);
}

.form-check-label {
  font-size: 14px;
  color: var(--slate-700);
  margin-left: 4px;
}

/* ========================================
   Login Page
   ======================================== */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--slate-900) 0%, var(--slate-800) 50%, var(--primary-700) 100%);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.login-card .card-body {
  padding: 40px;
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo i {
  font-size: 48px;
  color: var(--primary-500);
  margin-bottom: 16px;
  display: block;
}

.login-logo h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--slate-800);
  margin: 0 0 8px 0;
  letter-spacing: -0.02em;
}

.login-logo p {
  color: var(--slate-500);
  font-size: 14px;
  margin: 0;
}

.login-card .form-control {
  padding: 12px 16px;
  font-size: 15px;
}

.login-card .btn-primary {
  padding: 14px;
  font-size: 15px;
  margin-top: 8px;
}

/* ========================================
   Modals
   ======================================== */

.modal-content {
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  background: #fff;
  border-bottom: 1px solid var(--slate-100);
  padding: 20px 24px;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--slate-800);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  background: var(--slate-50);
  border-top: 1px solid var(--slate-100);
  padding: 16px 24px;
}

.btn-close {
  opacity: 0.5;
}

.btn-close:hover {
  opacity: 1;
}

/* ========================================
   Dropdowns
   ======================================== */

.dropdown-menu {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  font-size: 0.8rem;
}

.dropdown-item {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--slate-700);
  font-weight: 500;
}

.dropdown-item:hover {
  background: var(--slate-100);
  color: var(--slate-800);
}

.dropdown-item i {
  margin-right: 8px;
  width: 16px;
  text-align: center;
  color: var(--slate-500);
}

.dropdown-divider {
  border-color: var(--slate-100);
  margin: 6px 0;
}

/* ========================================
   Alerts
   ======================================== */

.alert {
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 500;
}

.alert-primary {
  background: var(--primary-50);
  color: var(--primary-700);
}

.alert-success {
  background: var(--success-light);
  color: #065f46;
}

.alert-warning {
  background: var(--warning-light);
  color: #92400e;
}

.alert-danger {
  background: var(--error-light);
  color: #991b1b;
}

.alert-info {
  background: var(--info-light);
  color: #1e40af;
}

/* ========================================
   Pagination
   ======================================== */

.pagination {
  gap: 4px;
}

.page-link {
  border: none;
  border-radius: var(--radius-md);
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--slate-600);
  background: transparent;
}

.page-link:hover {
  background: var(--slate-100);
  color: var(--slate-800);
}

.page-item.active .page-link {
  background: var(--primary-600);
  color: #fff;
}

.page-item.disabled .page-link {
  color: var(--slate-400);
  background: transparent;
}

/* ========================================
   Charts & Stats Containers
   ======================================== */

.chart-container {
  position: relative;
  height: 300px;
  width: 100%;
}

.quality-metric {
  background: var(--slate-50);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  transition: all var(--transition-fast);
}

.quality-metric:hover {
  background: var(--slate-100);
}

.quality-metric small {
  display: block;
  font-size: 11px;
  color: var(--slate-500);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
  margin-bottom: 4px;
}

.quality-metric h5 {
  font-size: 20px;
  font-weight: 700;
  color: var(--slate-800);
  margin: 0;
}

/* ========================================
   Live Indicator
   ======================================== */

.live-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.1);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }
}

/* ========================================
   Agent Ranking
   ======================================== */

.agent-rank {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.agent-rank:hover {
  background: var(--slate-50);
}

.rank-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12px;
}

.rank-1 {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #fff;
}
.rank-2 {
  background: linear-gradient(135deg, #9ca3af, #6b7280);
  color: #fff;
}
.rank-3 {
  background: linear-gradient(135deg, #d97706, #b45309);
  color: #fff;
}
.rank-4, .rank-5 {
  background: var(--slate-100);
  color: var(--slate-600);
}

/* ========================================
   Callback Items
   ======================================== */

.callback-item {
  padding: 14px 16px;
  border-left: 3px solid var(--primary-400);
  background: #fff;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 8px;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-xs);
}

.callback-item:hover {
  background: var(--slate-50);
  transform: translateX(4px);
}

/* ========================================
   Active Call Items
   ======================================== */

.active-call-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--slate-100);
  transition: background var(--transition-fast);
}

.active-call-item:hover {
  background: var(--slate-50);
}

.active-call-item:last-child {
  border-bottom: none;
}

/* ========================================
   Group Cards
   ======================================== */

.group-card {
  border-left: 4px solid var(--primary-500);
  transition: all var(--transition-normal);
}

.group-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

/* ========================================
   Progress Bars
   ======================================== */

.progress {
  background: var(--slate-100);
  border-radius: 20px;
  height: 8px;
  overflow: hidden;
}

.progress-bar {
  border-radius: 20px;
  transition: width var(--transition-slow);
}

.progress-thin {
  height: 4px;
}

/* ========================================
   Code Blocks
   ======================================== */

code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 12px;
  background: var(--slate-100);
  color: var(--primary-600);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

pre {
  background: var(--slate-900);
  color: var(--slate-100);
  padding: 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  overflow-x: auto;
}

pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

/* JSON Editor */
.json-editor {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 16px;
}

/* ========================================
   Utilities
   ======================================== */

.text-primary { color: var(--primary-600) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--error) !important; }
.text-muted { color: var(--slate-500) !important; }

.bg-primary { background-color: var(--primary-600) !important; }
.bg-success { background-color: var(--success) !important; }
.bg-warning { background-color: var(--warning) !important; }
.bg-danger { background-color: var(--error) !important; }

.border-primary { border-color: var(--primary-500) !important; }

/* Status Colors */
.status-pending { color: var(--warning); }
.status-in_progress { color: var(--info); }
.status-completed { color: var(--success); }
.status-failed { color: var(--error); }
.status-active { color: var(--success); }
.status-paused { color: var(--slate-500); }

/* ========================================
   Spinner & Loading
   ======================================== */

.spinner-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(2px);
}

.spinner-border {
  width: 2rem;
  height: 2rem;
  border-width: 2px;
}

/* ========================================
   Empty States
   ======================================== */

.empty-state {
  text-align: center;
  padding: 48px 24px;
}

.empty-state i {
  font-size: 48px;
  color: var(--slate-300);
  margin-bottom: 16px;
}

.empty-state h5 {
  color: var(--slate-600);
  font-weight: 600;
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--slate-500);
  font-size: 14px;
  margin: 0;
}

/* ========================================
   Nav Tabs
   ======================================== */

.nav-tabs {
  border-bottom: 1px solid var(--slate-200);
  gap: 4px;
}

.nav-tabs .nav-link {
  border: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 10px 16px;
  font-weight: 500;
  color: var(--slate-500);
  background: transparent;
}

.nav-tabs .nav-link:hover {
  color: var(--slate-700);
  background: var(--slate-50);
}

.nav-tabs .nav-link.active {
  color: var(--primary-600);
  background: #fff;
  border-bottom: 2px solid var(--primary-600);
}

/* ========================================
   Tooltips
   ======================================== */

.tooltip-inner {
  background: var(--slate-800);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
}

/* ========================================
   Mobile Menu Toggle
   ======================================== */

.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1001;
  background: var(--slate-800);
  color: #fff;
  border: none;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 20px;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1200px) {
  .content-body {
    padding: 20px 24px;
  }
}

@media (max-width: 992px) {
  :root {
    --sidebar-width: 240px;
  }

  .content-header {
    padding: 16px 20px;
  }

  .content-body {
    padding: 16px 20px;
  }

  /* 테이블 가로 스크롤 */
  .table-responsive {
    -webkit-overflow-scrolling: touch;
  }

  /* 카드 내부 간격 축소 */
  .card-body {
    padding: 16px;
  }

  .card-header {
    padding: 12px 16px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
  }

  .sidebar.show {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .content-header {
    padding-left: 56px;
  }

  .metric-value {
    font-size: 24px;
  }

  .stat-value {
    font-size: 28px;
  }

  /* 탭 가로 스크롤 */
  .nav-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .nav-tabs::-webkit-scrollbar { display: none; }
  .nav-tabs .nav-item { flex-shrink: 0; }
  .nav-tabs .nav-link { white-space: nowrap; font-size: 12px; padding: 8px 10px; }

  /* 카드 헤더 탭 레이아웃 */
  .card-header-tabs {
    border-bottom: none;
  }

  /* 버튼 그룹 줄바꿈 */
  .header-actions,
  .d-flex.gap-2,
  .d-flex.gap-1 {
    flex-wrap: wrap;
  }

  /* 모달 풀스크린에 가깝게 */
  .modal-dialog {
    margin: 16px;
  }

  .modal-lg,
  .modal-xl {
    max-width: calc(100vw - 32px);
  }
}

/* Call-Desk 반응형 */
@media (max-width: 768px) {
  .call-desk-row > .col-md-3,
  .call-desk-row > .col-md-6 { flex: 0 0 100%; max-width: 100%; }
  #softphone-panel { position: static !important; width: 100% !important; }
}

@media (max-width: 576px) {
  .content-header { padding: 12px 16px 12px 52px; }
  .content-body { padding: 12px 16px; }
  .content-header h4 { font-size: 16px; }
  .metric-value { font-size: 20px; }
  .stat-value { font-size: 24px; }
  .card-body { padding: 14px; }
  .metric-card { padding: 14px; }
  .modal-dialog { margin: 8px; }

  /* 폼 요소 축소 */
  .form-control, .form-select { font-size: 13px; padding: 8px 10px; }
  .form-control-sm, .form-select-sm { font-size: 12px; padding: 6px 8px; }

  /* 버튼 축소 */
  .btn { font-size: 0.75rem; padding: 6px 12px; }
  .btn-sm { font-size: 11px; padding: 4px 8px; }
  .btn i { font-size: 14px; }

  /* 배지 축소 */
  .badge { font-size: 0.6rem; padding: 3px 7px; }

  /* 테이블 폰트 축소 */
  .table { font-size: 0.72rem; }
  .table th { font-size: 10px; padding: 8px 10px; }
  .table td { padding: 10px; }
}

@media (max-width: 480px) {
  .content-header { padding: 10px 12px 10px 48px; }
  .content-body { padding: 10px 12px; }
  .chart-container { height: 200px; }

  /* 사이드바 토글 버튼 위치 */
  .mobile-menu-toggle { top: 10px; left: 10px; }

  /* 카드 간격 축소 */
  .card { margin-bottom: 16px; }
  .card-header h5, .card-header .card-title { font-size: 0.85rem; }
}

/* 접근성: 포커스 링 */
.btn:focus-visible { outline: 2px solid var(--primary-500, #6366f1); outline-offset: 2px; }

/* ========================================
   Print Styles
   ======================================== */

@media print {
  .sidebar,
  .mobile-menu-toggle,
  .btn,
  .dropdown {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  .card {
    box-shadow: none;
    border: 1px solid var(--slate-200);
  }
}

/* ========================================
   Scrollbar Styling
   ======================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--slate-100);
}

::-webkit-scrollbar-thumb {
  background: var(--slate-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--slate-400);
}

/* ========================================
   Selection
   ======================================== */

::selection {
  background: var(--primary-200);
  color: var(--primary-900);
}