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

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #8b5cf6;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --dark-bg: #0f0c29;
  --dark-secondary: #1a1a4e;
  --dark-tertiary: #24243e;
  --light-bg: #f8fafc;
  --white: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  --gradient-dark: linear-gradient(135deg, #0f0c29 0%, #1a1a4e 40%, #24243e 100%);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
}

html, body {
  height: 100%;
  width: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--light-bg);
  overflow-x: hidden;
}

/* Container */
.container { 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 24px; 
}

.container-sm { 
  max-width: 800px; 
  margin: 0 auto; 
  padding: 0 24px; 
}

/* Section Base */
.section { 
  padding: 100px 0; 
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.badge-primary { 
  background: rgba(99, 102, 241, 0.15); 
  color: var(--primary); 
  border: 1px solid rgba(99, 102, 241, 0.3); 
}

.badge-success { 
  background: var(--success-light); 
  color: #065b21; 
}

.badge-warning { 
  background: var(--warning-light); 
  color: #92400e; 
}

.badge-light { 
  background: #f1f5f9; 
  color: var(--text-secondary); 
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: none;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before { 
  left: 100%; 
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(99, 102, 241, 0.5);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-secondary {
  background: var(--secondary);
  color: white;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.5);
}

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

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

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
  border-radius: 10px;
}

.btn-lg {
  padding: 18px 36px;
  font-size: 18px;
  border-radius: 16px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Cards */
.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.card-hover {
  transition: all 0.2s ease;
}

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

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

.card-body {
  padding: 24px;
}

.card-footer {
  padding: 24px;
  border-top: 1px solid var(--border);
  background: #fafbfc;
  border-radius: 0 0 12px 12px;
}

/* Form Elements */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  background: white;
  transition: all 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

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

/* Navigation */
nav {
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-brand {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mt-60 { margin-top: 60px; }

.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }

.gap-12 { gap: 12px; }
.gap-24 { gap: 24px; }

.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }

.w-full { width: 100%; }
.h-full { height: 100%; }

/* Loading & Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(99, 102, 241, 0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

/* Responsive */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section { padding: 60px 0; }
  .btn { padding: 14px 24px; font-size: 14px; }
  .nav-links { gap: 24px; font-size: 14px; }
  
  .hidden-mobile { display: none !important; }
}