body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: #0f172a;
  color: #f1f5f9;
}

/* Navigation */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 60px;
  background: #020617;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-weight: 800;
  letter-spacing: 2px;
  text-decoration: none;
  color: #ffffff;
  font-size: 1.2rem;
  cursor: pointer;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: #cccccc;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.07);
}

/* Standard nav buttons */
.nav-btn {
  color: white;
  text-decoration: none;
  background: #6366f1;
  padding: 8px 16px;
  border-radius: 6px;
  margin-left: 16px;
}

/* Hamburger menu container for small screens */
#hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  width: 24px;
  height: 18px;
  justify-content: space-between;
}

#hamburger div {
  display: block;
  height: 3px;
  background: white;
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Hamburger open state (turns into X) */
#hamburger.open div:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

#hamburger.open div:nth-child(2) {
  opacity: 0;
}

#hamburger.open div:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav links */
@media (max-width: 768px) {
  #nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    right: 20px;
    background: #020617;
    padding: 20px;
    border-radius: 8px;
  }

  #nav-links.active {
    display: flex;
  }

  #hamburger {
    display: flex;
  }

  #nav-links a {
    margin: 12px 0;
  }
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 120px 20px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
}

.hero span {
  background: linear-gradient(90deg, #38bdf8, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  max-width: 700px;
  margin: 20px auto;
  color: #94a3b8;
}

.primary-btn {
  background: linear-gradient(90deg, #6366f1, #38bdf8);
  padding: 14px 24px;
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
}

/* Stats Section */
.stats {
  display: flex;
  justify-content: space-around;
  padding: 60px 20px;
  background: #111827;
  text-align: center;
}

.stat h2 {
  font-size: 2rem;
  color: #38bdf8;
}

/* Features Section */
.features {
  padding: 80px 20px;
  text-align: center;
}

.features h2 {
  margin-bottom: 40px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.card {
  background: #1e293b;
  padding: 30px;
  border-radius: 12px;
  transition: transform 0.3s ease, opacity 0.6s ease;
  opacity: 0;
  transform: translateY(20px);
}

.card:hover {
  transform: translateY(-8px);
}

/* Problem Section */
.problem {
  padding: 80px 20px;
  text-align: center;
  background: #111827;
}

/* CTA Section */
.cta {
  padding: 100px 20px;
  text-align: center;
}

/* Footer */
footer {
  text-align: center;
  padding: 30px;
  background: #020617;
  color: #64748b;
}