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

:root {
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-danger: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --gradient-dark: linear-gradient(135deg, #434343 0%, #000000 100%);

  --bg-primary: #0f0f1e;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --bg-hover: #1e2a47;

  --text-primary: #ffffff;
  --text-secondary: #b8b9cc;
  --text-muted: #6c6d7d;

  --border-color: #2a3a5a;
  --success: #00f2a9;
  --danger: #ff6b9d;
  --warning: #ffd93d;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  padding: 1rem;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  animation: fadeIn 0.6s ease-in-out;
}

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

/* Header Styles */
.header {
  background: var(--gradient-primary);
  padding: 2rem;
  border-radius: 20px;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.header-content {
  position: relative;
  z-index: 1;
}

.header-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon {
  font-size: 3rem;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.header-subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
  font-weight: 300;
}

/* Controls Section */
.controls-section {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.search-wrapper {
  flex: 1;
  min-width: 300px;
  position: relative;
}

.search-icon {
  position: absolute;
  left: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 1rem 1rem 1rem 3.5rem;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.filter-group {
  display: flex;
  gap: 0.75rem;
}

.filter-btn,
.add-btn {
  padding: 1rem 1.5rem;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.filter-btn {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.filter-btn:hover {
  background: var(--bg-hover);
  transform: translateY(-2px);
}

.add-btn {
  background: var(--gradient-success);
  color: white;
  box-shadow: var(--shadow-md);
}

.add-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Filter Panel */
.filter-panel {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  animation: slideDown 0.3s ease-out;
}

.filter-panel.hidden {
  display: none;
}

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

.filter-content h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.filter-options {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.filter-options label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.filter-options label:hover {
  color: var(--text-primary);
}

.filter-options input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
}

.stat-card:nth-child(2)::before {
  background: var(--gradient-success);
}

.stat-card:nth-child(3)::before {
  background: var(--gradient-secondary);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: #667eea;
}

.stat-icon {
  font-size: 3rem;
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(102, 126, 234, 0.1);
  border-radius: 12px;
}

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

/* Table Container */
.table-container {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  overflow-x: auto;
  box-shadow: var(--shadow-md);
}

.loading-spinner {
  text-align: center;
  padding: 3rem;
}

.spinner {
  width: 50px;
  height: 50px;
  margin: 0 auto 1rem;
  border: 4px solid var(--border-color);
  border-top: 4px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.error-message {
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
  color: white;
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  text-align: center;
}

.error-message.hidden {
  display: none;
}

/* Table Styles */
.user-table {
  width: 100%;
  border-collapse: collapse;
}

.user-table thead {
  background: var(--gradient-primary);
}

.user-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

.user-table tbody tr {
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.user-table tbody tr:hover {
  background: var(--bg-hover);
}

.user-table td {
  padding: 1rem;
  color: var(--text-secondary);
}

.user-table td:first-child {
  font-weight: 600;
  color: var(--text-primary);
}

.action-buttons {
  display: flex;
  gap: 0.5rem;
}

.btn-edit,
.btn-delete-action {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

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

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

.btn-edit:hover,
.btn-delete-action:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.3s ease-out;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 20px;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease-out;
}

.modal-small {
  max-width: 450px;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  padding: 2rem 2rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.8rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.close-btn {
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

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

/* Form Styles */
.user-form {
  padding: 2rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.required {
  color: var(--danger);
}

.form-group input {
  padding: 0.875rem;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group input.error {
  border-color: var(--danger);
}

.error-text {
  color: var(--danger);
  font-size: 0.85rem;
  min-height: 1.2rem;
}

.modal-footer {
  padding: 1.5rem 2rem 2rem;
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.btn-cancel,
.btn-submit,
.btn-delete {
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-submit {
  background: var(--gradient-success);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-delete {
  background: var(--gradient-secondary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-cancel:hover,
.btn-submit:hover,
.btn-delete:hover {
  transform: translateY(-2px);
}

/* Delete Modal */
.delete-content {
  padding: 2rem;
  text-align: center;
}

.warning-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.delete-content p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.warning-text {
  color: var(--danger);
  font-weight: 600;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  transform: translateX(400px);
  transition: var(--transition);
  font-weight: 500;
  z-index: 2000;
}

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

.toast.success {
  background: var(--gradient-success);
}

.toast.error {
  background: var(--gradient-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-title {
    font-size: 2rem;
  }

  .icon {
    font-size: 2rem;
  }

  .controls-section {
    flex-direction: column;
  }

  .search-wrapper {
    min-width: 100%;
  }

  .filter-group {
    width: 100%;
    justify-content: space-between;
  }

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

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

  .table-container {
    padding: 1rem;
  }

  .user-table {
    font-size: 0.85rem;
  }

  .user-table th,
  .user-table td {
    padding: 0.75rem 0.5rem;
  }

  .modal-content {
    width: 95%;
    margin: 1rem;
  }

  .user-form {
    padding: 1.5rem;
  }

  .modal-header {
    padding: 1.5rem 1.5rem 1rem;
  }

  .modal-footer {
    padding: 1rem 1.5rem 1.5rem;
    flex-direction: column;
  }

  .btn-cancel,
  .btn-submit,
  .btn-delete {
    width: 100%;
  }

  .toast {
    right: 1rem;
    left: 1rem;
    bottom: 1rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.5rem;
  }

  .header {
    padding: 1.5rem;
  }

  .header-title {
    font-size: 1.5rem;
    flex-direction: column;
    align-items: flex-start;
  }

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

  .btn-edit,
  .btn-delete-action {
    width: 100%;
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

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

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