:root {
  --primary-color: #4F46E5; /* Indigo 600 */
  --primary-hover: #4338CA;
  --bg-color: #0F172A; /* Slate 900 */
  --surface-color: rgba(30, 41, 59, 0.7); /* Slate 800 with opacity */
  --surface-border: rgba(255, 255, 255, 0.1);
  --text-primary: #F8FAFC; /* Slate 50 */
  --text-secondary: #94A3B8; /* Slate 400 */
  
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;

  --glass-bg: rgba(15, 23, 42, 0.65);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  --glass-blur: blur(16px);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  background-image: 
    radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
    radial-gradient(at 50% 0%, hsla(225,39%,30%,0.2) 0, transparent 50%), 
    radial-gradient(at 100% 0%, hsla(339,49%,30%,0.1) 0, transparent 50%);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Glassmorphism Utility */
.glass-panel {
  background: var(--glass-bg);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

/* Inputs & Buttons */
input, select, textarea {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--surface-border);
  color: var(--text-primary);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  transition: all 0.3s ease;
  width: 100%;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

button {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

button:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

button.secondary {
  background: rgba(255, 255, 255, 0.1);
}

button.secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Layout */
.app-container {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 260px;
  padding: 24px;
  border-right: 1px solid var(--surface-border);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-item {
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.nav-item.active {
  background: rgba(79, 70, 229, 0.15);
  color: var(--primary-color);
}

.main-content {
  flex: 1;
  padding: 32px;
  overflow-y: auto;
}

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

.page-title {
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th, .data-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--surface-border);
}

.data-table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Badges */
.badge {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
}
.badge.active { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge.warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge.danger { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

/* Utilities */
.hidden { display: none !important; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.flex { display: flex; }
.gap-4 { gap: 1rem; }