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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: #000;
  color: #fff;
  line-height: 1.6;
  scroll-behavior: smooth;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 48px;
  background: #000;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
  font-size: 1.6em;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.logo span {
  color: #00ffd0;
}

nav a {
  margin-left: 30px;
  text-decoration: none;
  color: #ccc;
  font-weight: 500;
  transition: color 0.3s;
}

nav a:hover {
  color: #00ffd0;
}

.hero {
  background-color: #000;
  background-image: url('https://images.unsplash.com/photo-1634712282287-14c7c41230a8?auto=format&fit=crop&w=1470&q=80');
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.75);
  z-index: 1;
}

.hero .content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 0 20px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 600;
  letter-spacing: -1px;
  margin-bottom: 20px;
  color: #fff;
}

.hero h1 span {
  color: #00ffd0;
}

.hero p {
  font-size: 1.1rem;
  color: #ccc;
  margin-bottom: 30px;
}

.btn {
  padding: 14px 32px;
  background-color: #fff;
  color: #000;
  border: none;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.3s ease;
}

.btn:hover {
  background-color: #00ffd0;
  color: #000;
}

.section {
  padding: 100px 40px;
  background-color: #000;
  text-align: center;
}

.section h2 {
  font-size: 2.5em;
  margin-bottom: 20px;
  font-weight: 600;
}

.section p {
  max-width: 700px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: #aaa;
}

footer {
  text-align: center;
  padding: 40px 20px;
  background-color: #000;
  font-size: 0.9em;
  color: #555;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}