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

:root {
  --primary: #f6821f;
  --dark: #1a1a2e;
  --text: #333;
  --light: #f8f9fa;
  --radius: 8px;
}

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

/* Nav */
header {
  position: sticky;
  top: 0;
  background: var(--dark);
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  color: var(--primary);
  font-size: 1.4rem;
  font-weight: 700;
}

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

nav a {
  color: #ccc;
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Hero */
.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--dark) 0%, #16213e 100%);
  color: #fff;
  padding: 4rem 2rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  color: #aaa;
  margin-bottom: 2rem;
  max-width: 500px;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: opacity 0.2s, transform 0.2s;
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

/* About */
.about {
  padding: 5rem 2rem;
  background: var(--light);
  text-align: center;
}

.about h2 {
  font-size: 2rem;
  margin-bottom: 3rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  transition: transform 0.2s;
}

.card:hover {
  transform: translateY(-4px);
}

.card h3 {
  color: var(--primary);
  margin-bottom: 0.75rem;
}

/* Contact */
.contact {
  padding: 5rem 2rem;
  text-align: center;
}

.contact h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 480px;
  margin: 0 auto;
}

input, textarea {
  padding: 0.75rem 1rem;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
}

textarea {
  resize: vertical;
}

/* Footer */
footer {
  background: var(--dark);
  color: #888;
  text-align: center;
  padding: 1.5rem;
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  nav ul {
    gap: 1rem;
  }
}