:root {
  --primary: #F7931A;
  --secondary: #0D1B2A;
  --bg: #ffffff;
  --text: #171717;
  --text-muted: #4b5563;
  --border: #e5e7eb;
  --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

header {
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: -0.025em;
}

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

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--secondary);
  font-weight: 600;
  transition: color 0.2s ease;
}

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

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.hero {
  text-align: center;
  padding-bottom: 4rem;
}

.hero h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  color: var(--secondary);
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s ease, background-color 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: #e27e00;
  transform: translateY(-2px);
}

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

.learning-path {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.step-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.step-card:hover {
  box-shadow: var(--card-shadow);
  border-color: var(--primary);
}

.step-number {
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: block;
}

.step-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--secondary);
}

.step-card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 1rem;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 2px;
}

.highlight {
  color: var(--primary);
  font-weight: 600;
}

footer {
  margin-top: 6rem;
  padding: 4rem 2rem;
  background-color: var(--secondary);
  color: #ffffff;
  text-align: center;
}

footer p {
  opacity: 0.8;
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  nav {
    display: none;
  }
}