:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(31, 41, 55, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent-blue: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-purple: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: radial-gradient(circle at 15% 15%, #1e1b4b 0%, var(--bg-primary) 65%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.5);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
  color: #ffffff;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.25), rgba(168, 85, 247, 0.1));
  border-left: 3px solid var(--accent-indigo);
}

.nav-item .icon {
  font-size: 1.2rem;
}

.server-status-widget {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.8rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--accent-emerald);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Main Content Area */
.main-content {
  flex-grow: 1;
  padding: 32px 40px;
  overflow-y: auto;
  max-height: 100vh;
}

.header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 4px;
}

.header-actions {
  display: flex;
  gap: 12px;
}

/* Tab Panels */
.tab-panel {
  display: none;
  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Stats Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  box-shadow: var(--shadow-glass);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-glow);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-icon.blue { background: rgba(56, 189, 248, 0.15); color: var(--accent-blue); }
.stat-icon.purple { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }
.stat-icon.emerald { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }
.stat-icon.amber { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 2px;
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-glass);
  margin-bottom: 28px;
}

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

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-control {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 10px 14px;
  font-size: 0.95rem;
  outline: none;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  font-family: inherit;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.825rem;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

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

.data-table th {
  padding: 12px 16px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 16px;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-emerald { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-blue { background: rgba(56, 189, 248, 0.15); color: var(--accent-blue); border: 1px solid rgba(56, 189, 248, 0.3); }
.badge-purple { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); border: 1px solid rgba(168, 85, 247, 0.3); }
.badge-amber { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-rose { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); border: 1px solid rgba(244, 63, 94, 0.3); }

/* Code box */
.code-preview {
  background: #060911;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: 'Consolas', 'Fira Code', monospace;
  font-size: 0.85rem;
  color: #38bdf8;
  max-height: 240px;
  overflow-y: auto;
  white-space: pre-wrap;
}