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

:root {
  --primary-color: #0066cc;
  --primary-hover: #0052a3;
  --background: #f5f5f5;
  --card-background: #ffffff;
  --text-primary: #333333;
  --text-secondary: #666666;
  --border-radius: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Header */
header {
  background: var(--card-background);
  padding: 1rem 2rem;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

#user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Login View */
#login-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  padding: 2rem;
}

.login-container {
  background: var(--card-background);
  padding: 3rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.login-container h1 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.login-container p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Apps View */
#apps-view {
  display: none;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 2rem;
}

.apps-header {
  margin-bottom: 2rem;
}

.apps-header h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.apps-header p {
  color: var(--text-secondary);
}

#apps-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* App Card */
.app-card {
  background: var(--card-background);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: start;
  gap: 1.5rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.app-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.app-icon {
  font-size: 3rem;
  flex-shrink: 0;
}

.app-info h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.app-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Buttons */
button, .btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.75rem 2rem;
  border-radius: var(--border-radius);
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
  font-weight: 500;
}

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

.logout-btn {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--text-secondary);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 1rem;
  }

  #apps-container {
    grid-template-columns: 1fr;
  }

  .login-container {
    padding: 2rem;
  }

  #apps-view {
    padding: 0 1rem;
  }
}