:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-card: #1e2130;
  --bg-input: #252836;
  --bg-hover: #2a2d3e;
  --border: #2e3148;
  --text-primary: #e4e6f0;
  --text-secondary: #8b8fa3;
  --text-muted: #5c6078;
  --accent: #6c5ce7;
  --accent-hover: #7c6ef7;
  --success: #00b894;
  --warning: #fdcb6e;
  --danger: #e17055;
  --danger-hover: #d4564a;
  --info: #74b9ff;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

#app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar.hidden {
  display: none;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.sidebar-header .subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.nav-links {
  list-style: none;
  padding: 12px 0;
  flex: 1;
}

.nav-links a {
  display: block;
  padding: 10px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.nav-links a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-links a.active {
  background: var(--bg-hover);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 500;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

/* Content */
.content {
  flex: 1;
  margin-left: 240px;
  padding: 32px;
  max-width: 1200px;
}

.content.full-width {
  margin-left: 0;
  max-width: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

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

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

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

.btn-success:hover {
  filter: brightness(1.1);
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

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

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

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

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 14px;
  transition: border-color 0.15s;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
}

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

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

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

.card-title {
  font-size: 16px;
  font-weight: 600;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
}

.stat-value.success { color: var(--success); }
.stat-value.warning { color: var(--warning); }
.stat-value.danger { color: var(--danger); }
.stat-value.info { color: var(--info); }

/* Table */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

tr:hover td {
  background: var(--bg-hover);
}

/* Badge */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge-success { background: rgba(0, 184, 148, 0.15); color: var(--success); }
.badge-danger { background: rgba(225, 112, 85, 0.15); color: var(--danger); }
.badge-warning { background: rgba(253, 203, 110, 0.15); color: var(--warning); }
.badge-info { background: rgba(116, 185, 255, 0.15); color: var(--info); }

/* Search & Filter bar */
.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.toolbar .form-input {
  max-width: 300px;
}

.toolbar select {
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 13px;
}

.toolbar select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.pagination-info {
  font-size: 13px;
  color: var(--text-secondary);
}

.pagination-buttons {
  display: flex;
  gap: 8px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 480px;
  width: 90%;
  box-shadow: var(--shadow);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
  max-width: 360px;
}

.toast-success { background: var(--success); color: white; }
.toast-error { background: var(--danger); color: white; }
.toast-info { background: var(--info); color: white; }

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

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 14px;
}

/* Login page */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
}

.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 360px;
  text-align: center;
}

.login-box h1 {
  font-size: 24px;
  margin-bottom: 4px;
  color: var(--accent);
}

.login-box .subtitle {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 28px;
}

.login-box .form-input {
  margin-bottom: 16px;
}

.login-box .btn {
  width: 100%;
  justify-content: center;
  padding: 10px;
}

.login-error {
  color: var(--danger);
  font-size: 13px;
  margin-bottom: 12px;
  min-height: 20px;
}

/* Page header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
}

/* Inline edit */
.inline-edit {
  display: flex;
  align-items: center;
  gap: 6px;
}

.inline-edit input {
  width: 200px;
  padding: 4px 8px;
  background: var(--bg-input);
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 13px;
}

/* Detail grid */
.detail-grid {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 8px 16px;
  font-size: 14px;
}

.detail-label {
  color: var(--text-muted);
  font-weight: 500;
}

.detail-value {
  color: var(--text-primary);
  word-break: break-all;
}

/* Section */
.section {
  margin-top: 24px;
}

.section-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

/* Clickable row */
tr.clickable {
  cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 200px;
  }
  .content {
    margin-left: 200px;
    padding: 20px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}