:root {
  /* Dark Theme Colors */
  --bg: #0a0e1a;
  --bg-secondary: #0d1117;
  --panel: #12171f;
  --card: #161b22;
  --card-hover: #1c2128;
  
  /* Text Colors */
  --text: #e6edf3;
  --text-secondary: #8b949e;
  --muted: #6e7681;
  
  /* Brand Colors */
  --brand: #2ea44f;
  --brand-hover: #2c974b;
  --brand-secondary: #0969da;
  --brand-accent: #8250df;
  
  /* Status Colors */
  --success: #3fb950;
  --success-bg: rgba(63, 185, 80, 0.1);
  --warning: #d29922;
  --warning-bg: rgba(210, 153, 34, 0.1);
  --danger: #f85149;
  --danger-bg: rgba(248, 81, 73, 0.1);
  --info: #58a6ff;
  --info-bg: rgba(88, 166, 255, 0.1);
  
  /* Border & Shadow */
  --border: rgba(240, 246, 252, 0.1);
  --border-muted: rgba(240, 246, 252, 0.05);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px 0 rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 60px 0 rgba(0, 0, 0, 0.6);
  
  /* Effects */
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --glass: rgba(255, 255, 255, 0.05);
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  color: var(--text);
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(46, 164, 79, 0.15), transparent),
    radial-gradient(ellipse 60% 50% at 50% 120%, rgba(130, 80, 223, 0.15), transparent),
    var(--bg);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Utility Classes */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-sm {
  max-width: 720px;
}

.container-lg {
  max-width: 1536px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

a {
  color: var(--brand-secondary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--brand);
}

/* Header / Navbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(12px) saturate(180%);
  background: rgba(10, 14, 26, 0.85);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  transition: var(--transition);
}

.brand:hover {
  color: var(--brand);
}

.brand-badge {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand), var(--brand-accent));
  box-shadow: 0 8px 24px rgba(46, 164, 79, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-5px); }
}

.navlinks {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.navlinks a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: var(--transition);
}

.navlinks a:hover {
  background: var(--glass);
  color: var(--text);
}

.navlinks a.active {
  background: var(--brand-secondary);
  color: white;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--glass);
  color: var(--text);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-hover));
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 14px rgba(46, 164, 79, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--brand-hover), var(--brand));
  box-shadow: 0 6px 20px rgba(46, 164, 79, 0.5);
}

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

.btn-secondary:hover {
  background: #0860ca;
}

.btn-danger {
  background: var(--danger-bg);
  border-color: rgba(248, 81, 73, 0.3);
  color: var(--danger);
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 14px 24px;
  font-size: 1.0625rem;
}

/* Cards & Panels */
.panel, .card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.panel {
  padding: 24px;
}

.card {
  padding: 20px;
  cursor: pointer;
}

.card:hover {
  background: var(--card-hover);
  border-color: var(--brand);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-glass {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
}

/* Grid System */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.9375rem;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9375rem;
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(46, 164, 79, 0.15);
}

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

select.form-control {
  cursor: pointer;
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

/* Alerts */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  animation: slideDown 0.3s ease-out;
}

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

.alert-success {
  background: var(--success-bg);
  border-color: rgba(63, 185, 80, 0.3);
  color: var(--success);
}

.alert-warning {
  background: var(--warning-bg);
  border-color: rgba(210, 153, 34, 0.3);
  color: var(--warning);
}

.alert-danger {
  background: var(--danger-bg);
  border-color: rgba(248, 81, 73, 0.3);
  color: var(--danger);
}

.alert-info {
  background: var(--info-bg);
  border-color: rgba(88, 166, 255, 0.3);
  color: var(--info);
}

/* Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-success {
  background: var(--success-bg);
  color: var(--success);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.badge-info {
  background: var(--info-bg);
  color: var(--info);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
}

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-muted);
}

.table th {
  background: var(--panel);
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table tr:last-child td {
  border-bottom: none;
}

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

/* Stats Cards */
.stat-card {
  background: linear-gradient(135deg, var(--card), var(--panel));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand), var(--brand-accent));
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--text), var(--brand));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-change {
  margin-top: 8px;
  font-size: 0.875rem;
  font-weight: 600;
}

.stat-change.positive {
  color: var(--success);
}

.stat-change.negative {
  color: var(--danger);
}

/* Loading States */
.skeleton {
  background: linear-gradient(90deg, var(--card) 25%, var(--panel) 50%, var(--card) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s ease-in-out infinite;
  border-radius: var(--radius);
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.spinner {
  border: 3px solid var(--border);
  border-top-color: var(--brand);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 0.8s linear infinite;
}

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

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease-out;
}

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

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Footer */
.footer {
  margin-top: 80px;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: 16px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .stat-value {
    font-size: 2rem;
  }
}

/* Utilities */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-secondary);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.p-0 { padding: 0; }
.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: 16px;
}

.gap-3 {
  gap: 24px;
}