:root {
  --primary-color: #4A6FFF;
  --secondary-color: #2D3A59;
  --accent-color: #00E4B1;
  --background-color: #0F172A;
  --surface-color: #1E293B;
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --border-color: #334155;
  --error: #EF4444;
  --success: #10B981;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--background-color);
  color: var(--text-main);
  line-height: 1.6;
}

header {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--primary-color);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.3s ease;
}

nav a:hover, nav a.active {
  color: var(--accent-color);
}

.btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  background: #3B5BCC;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(74, 111, 255, 0.3);
}

.btn-accent {
  background: var(--accent-color);
  color: #000;
}

.btn-accent:hover {
  background: #00C69A;
  box-shadow: 0 4px 12px rgba(0, 228, 177, 0.3);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Forms */
.card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  background: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

.flash-messages {
  margin-bottom: 1.5rem;
}

.alert {
  padding: 1rem;
  border-radius: 8px;
  background: rgba(74, 111, 255, 0.1);
  border: 1px solid var(--primary-color);
  color: #A3B8FF;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.hero {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
  border-radius: 20px;
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(to right, #4A6FFF, #00E4B1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-pending { background: #F59E0B; color: #000; }
.badge-success { background: var(--success); color: #FFF; }

ul.data-list {
  list-style: none;
}

ul.data-list li {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

ul.data-list li:last-child {
  border-bottom: none;
}

.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
  header {
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
  }
  
  nav ul {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .container {
    padding: 1rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .hero {
    padding: 2rem 1rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .btn {
    padding: 0.8rem 1rem;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  header {
    padding: 0.75rem;
  }
  
  .logo {
    font-size: 1.2rem;
  }
  
  .container {
    padding: 0.75rem;
  }
  
  .card {
    padding: 1rem;
  }
  
  .hero h1 {
    font-size: 1.5rem;
  }
  
  .hero {
    padding: 1.5rem 0.75rem;
  }
  
  .form-control {
    padding: 0.8rem;
    font-size: 1rem;
    min-height: 48px;
  }
  
  .btn {
    padding: 1rem 1.2rem;
    font-size: 1rem;
    min-height: 48px;
    width: 100%;
    margin-bottom: 0.75rem;
    border-radius: 12px;
  }
  
  .btn-outline {
    margin-bottom: 0.75rem;
    padding: 1rem 1.2rem;
    min-height: 48px;
  }
  
  .btn-accent {
    padding: 1rem 1.2rem;
    min-height: 48px;
  }
}

/* Mobile Navigation */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
  border-radius: 8px;
  transition: background-color 0.3s ease;
}

.mobile-menu-toggle:hover {
  background-color: var(--surface-color);
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  nav {
    display: none;
    width: 100%;
  }
  
  nav.active {
    display: block;
  }
}

/* Responsive Tables */
@media (max-width: 768px) {
  table {
    font-size: 0.9rem;
  }
  
  th, td {
    padding: 0.5rem !important;
  }
  
  .btn {
    font-size: 0.8rem;
    padding: 0.6rem 0.8rem;
    min-height: 40px;
  }
}

@media (max-width: 480px) {
  table {
    font-size: 0.8rem;
  }
  
  th, td {
    padding: 0.3rem !important;
  }
  
  .btn {
    font-size: 0.9rem;
    padding: 0.8rem 1rem;
    min-height: 44px;
    width: 100%;
    margin-bottom: 0.5rem;
  }
}