:root {
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --secondary: #10B981;
  --accent: #F59E0B;
  --danger: #EF4444;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-600: #4B5563;
  --gray-900: #111827;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--gray-900);
  background-color: var(--gray-50);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.navbar-brand .logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.navbar-menu {
  display: flex;
  gap: 1rem;
  flex: 1;
}

.nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 1rem;
  text-decoration: none;
  color: var(--gray-600);
  border-radius: 8px;
  transition: all 0.2s;
}

.nav-link:hover {
  background: var(--gray-100);
  color: var(--primary);
}

.nav-link .icon {
  font-size: 1.25rem;
}

.navbar-user {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.user-name {
  font-weight: 600;
  color: var(--gray-900);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

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

.btn-logout {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--gray-600);
}

.btn-logout:hover {
  background: var(--gray-100);
}

/* Main Content */
.main-content {
  padding: 2rem 0;
  min-height: calc(100vh - 80px);
}

/* Cards */
.card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--gray-900);
}

/* Points Badge */
.points-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent), #FBBF24);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-size: 1.5rem;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

/* Task Item */
.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: 8px;
  margin-bottom: 0.75rem;
  transition: all 0.2s;
}

.task-item:hover {
  background: var(--gray-100);
  transform: translateX(4px);
}

.task-info {
  flex: 1;
}

.task-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 0.25rem;
}

.task-description {
  font-size: 0.875rem;
  color: var(--gray-600);
}

.task-points {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  margin-right: 1rem;
}

/* Status badges */
.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.status-pending {
  background: var(--gray-200);
  color: var(--gray-600);
}

.status-completed {
  background: #DBEAFE;
  color: #1E40AF;
}

.status-validated {
  background: #D1FAE5;
  color: #065F46;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar-menu {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--gray-200);
    padding: 0.5rem;
    justify-content: space-around;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  }

  .nav-link {
    padding: 0.5rem;
  }

  .nav-link span:not(.icon) {
    font-size: 0.75rem;
  }

  .main-content {
    padding-bottom: 80px;
  }
}