:root {
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #06b6d4;

  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --border-color: #e2e8f0;
  --border-radius: 8px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.2s ease-in-out;
}

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

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Header */
.header {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-dark) 100%
  );
  color: white;
  padding: 1.5rem 0;
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo svg {
  color: white;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.health-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  backdrop-filter: blur(10px);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.status-dot.online {
  background-color: var(--success-color);
}

.status-dot.offline {
  background-color: var(--danger-color);
}

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

/* Navigation */
.nav {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 0.5rem;
}

.nav-link {
  display: block;
  padding: 1rem 1.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
}

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

.nav-link.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Main */
.main {
  padding: 2rem 0;
  min-height: calc(100vh - 200px);
}

/* Section */
.section {
  display: none;
}

.section.active {
  display: block;
  animation: fadeIn 0.3s ease-in;
}

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

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Card */
.card {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-color);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  padding: 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn svg {
  flex-shrink: 0;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
  background: #475569;
}

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

.btn-success:hover:not(:disabled) {
  background: #059669;
}

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

.btn-warning:hover:not(:disabled) {
  background: #d97706;
}

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

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

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

.btn-info:hover:not(:disabled) {
  background: #0891b2;
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
}

.btn-icon {
  padding: 0.25rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

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

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

.btn-icon:hover svg {
  color: var(--primary-color);
}

/* Badge */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  text-transform: uppercase;
}

.badge.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge.badge-warning {
  background: #fef3c7;
  color: #92400e;
}

.badge.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge.badge-info {
  background: #cffafe;
  color: #155e75;
}

.badge.badge-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

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

/* Form Elements */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group small {
  display: block;
  margin-top: 0.25rem;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.input,
.select {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  transition: var(--transition);
  background: var(--bg-primary);
}

.input:focus,
.select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* File Upload */
.file-upload {
  position: relative;
}

.file-upload input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.file-upload-label {
  display: block;
  padding: 0.625rem 0.875rem;
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-secondary);
}

.file-upload-label:hover {
  border-color: var(--primary-color);
  background: var(--bg-primary);
}

/* List Container */
.list-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.list-item {
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  transition: var(--transition);
}

.list-item:hover {
  background: var(--bg-primary);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.list-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.list-item-title {
  font-weight: 600;
  color: var(--text-primary);
}

.list-item-body {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.list-item-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* Calls List */
.calls-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.call-item {
  padding: 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  transition: var(--transition);
}

.call-item:hover {
  background: var(--bg-primary);
  box-shadow: var(--shadow-sm);
}

.call-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.call-item-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.call-info-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.call-info-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.call-info-value {
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Control Buttons */
.control-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.control-buttons .btn {
  flex: 1;
  min-width: 150px;
  justify-content: center;
  font-size: 1rem;
  padding: 0.875rem 1.5rem;
}

/* Filter Group */
.filter-group {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease-in;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease-out;
}

.modal-content.modal-large {
  max-width: 800px;
}

.modal-content.modal-small {
  max-width: 400px;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.modal-body {
  padding: 1.5rem;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: var(--bg-primary);
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  max-width: 400px;
  border-left: 4px solid;
  animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast.toast-success {
  border-left-color: var(--success-color);
}

.toast.toast-error {
  border-left-color: var(--danger-color);
}

.toast.toast-warning {
  border-left-color: var(--warning-color);
}

.toast.toast-info {
  border-left-color: var(--info-color);
}

.toast-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.toast-title {
  font-weight: 600;
  font-size: 0.875rem;
}

.toast-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.25rem;
}

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

/* Loading */
.loading {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

.loading::after {
  content: "...";
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0%,
  20% {
    content: ".";
  }
  40% {
    content: "..";
  }
  60%,
  100% {
    content: "...";
  }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

/* Refresh Indicator */
.refresh-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--success-color);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  50%,
  100% {
    opacity: 1;
  }
  25%,
  75% {
    opacity: 0.3;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }

  .control-buttons {
    flex-direction: column;
  }

  .control-buttons .btn {
    width: 100%;
  }

  .list-item-body {
    grid-template-columns: 1fr;
  }

  .call-item-info {
    grid-template-columns: 1fr;
  }

  .toast-container {
    right: 0.5rem;
    left: 0.5rem;
  }

  .toast {
    min-width: auto;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}
.mt-1 {
  margin-top: 0.5rem;
}
.mt-2 {
  margin-top: 1rem;
}
.mb-1 {
  margin-bottom: 0.5rem;
}
.mb-2 {
  margin-bottom: 1rem;
}
.hidden {
  display: none !important;
}

/* Confirm Modal Specific Styles */
#confirmModal .modal-body {
  padding: 1.5rem 1.5rem 2rem;
}

#confirmModalMessage {
  color: var(--text-primary);
  font-size: 0.9375rem;
  margin: 0;
}

#confirmModal .modal-actions {
  padding: 1rem 1.5rem;
  gap: 0.75rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

#confirmModal .modal-actions .btn {
  flex: 1;
  justify-content: center;
}