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

:root {
  /* Modern dark theme inspired by design brief */
  --background: 0 0% 7%;
  --foreground: 0 0% 98%;
  --card: 0 0% 10%;
  --card-foreground: 0 0% 98%;
  --primary: 0 0% 98%;
  --primary-foreground: 0 0% 7%;
  --secondary: 0 0% 15%;
  --secondary-foreground: 0 0% 98%;
  --accent: 142 76% 59%;
  --accent-foreground: 0 0% 7%;
  --muted: 0 0% 15%;
  --muted-foreground: 0 0% 65%;
  --border: 0 0% 20%;
  --radius: 0.75rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", sans-serif;
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  line-height: 1.6;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Modern header with glassmorphism effect */
.header {
  background: hsl(var(--background) / 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid hsl(var(--border));
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.75rem;
  font-weight: 700;
  color: hsl(var(--foreground));
  text-decoration: none;
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: hsl(var(--muted-foreground));
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
  font-size: 0.95rem;
}

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

/* Modern button styles with smooth transitions */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px hsl(var(--primary) / 0.3);
}

.btn-accent {
  background: hsl(var(--accent));
  color: hsl(var(--accent-foreground));
  box-shadow: 0 4px 15px hsl(var(--accent) / 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px hsl(var(--accent) / 0.4);
}

.btn-secondary {
  background: hsl(var(--secondary));
  color: hsl(var(--secondary-foreground));
  border: 1px solid hsl(var(--border));
}

.btn-secondary:hover {
  background: hsl(var(--muted));
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: hsl(var(--card));
  border-color: hsl(var(--accent));
}

/* Hero section with modern typography */
.hero {
  padding: 8rem 0 6rem;
  text-align: center;
}

.hero h1 {
  font-size: 4.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, hsl(var(--foreground)), hsl(var(--muted-foreground)));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.35rem;
  color: hsl(var(--muted-foreground));
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Card design with subtle borders and hover effects */
.card {
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) * 1.5);
  padding: 2rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border-color: hsl(var(--accent) / 0.3);
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Grid */
.grid {
  display: grid;
  gap: 2rem;
  margin: 3rem 0;
}

.grid-cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* Modern form inputs */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: hsl(var(--foreground));
  font-size: 0.95rem;
}

.form-input {
  width: 100%;
  padding: 0.875rem 1.25rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  font-size: 1rem;
  background: hsl(var(--card));
  color: hsl(var(--foreground));
  transition: all 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: hsl(var(--accent));
  box-shadow: 0 0 0 3px hsl(var(--accent) / 0.1);
}

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

/* Alert */
.alert {
  padding: 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  border: 1px solid;
}

.alert-success {
  background: hsl(142 76% 10%);
  color: hsl(142 76% 70%);
  border-color: hsl(142 76% 30%);
}

.alert-error {
  background: hsl(0 72% 10%);
  color: hsl(0 72% 70%);
  border-color: hsl(0 72% 30%);
}

/* Dashboard */
.dashboard {
  padding: 2rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) * 1.5);
  padding: 2rem;
  transition: all 0.3s;
}

.stat-card:hover {
  border-color: hsl(var(--accent) / 0.3);
  transform: translateY(-2px);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: hsl(var(--accent));
  letter-spacing: -0.03em;
}

.stat-label {
  color: hsl(var(--muted-foreground));
  font-size: 0.95rem;
  font-weight: 500;
}

/* Product Grid */
.product-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.product-name {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* Footer */
.footer {
  background: hsl(var(--card));
  border-top: 1px solid hsl(var(--border));
  padding: 3rem 0;
  margin-top: 6rem;
  text-align: center;
  color: hsl(var(--muted-foreground));
}

/* Responsive design for mobile */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .nav-links {
    gap: 0.75rem;
    font-size: 0.85rem;
  }

  .btn {
    font-size: 0.85rem;
    padding: 0.75rem 1.25rem;
  }

  .grid-cols-3 {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 1rem;
  }

  .hero {
    padding: 3rem 0 2rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .card {
    padding: 1.5rem;
  }

  h1 {
    font-size: 2rem !important;
  }

  h2 {
    font-size: 1.5rem !important;
  }

  .stat-value {
    font-size: 2rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.75rem;
  }

  .header {
    padding: 1rem 0;
  }

  .logo {
    font-size: 1.25rem;
  }

  .nav-links {
    display: none;
  }
}

/* Loading animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: fadeIn 0.5s ease-out;
}