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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background: linear-gradient(135deg, #0f172a 0%, #1a2a3a 100%);
  color: #e2e8f0;
}

#header {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.3);
}

#header-img {
  height: 50px;
  filter: brightness(0) invert(1);
}

#nav-bar {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  padding: 8px 12px;
  border-radius: 6px;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

section {
  padding: 100px 20px 60px;
  margin-top: 60px;
}

h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  color: #06b6d4;
  letter-spacing: 1px;
}

.features-container,
.pricing-container {
  display: flex;
  justify-content: space-around;
  gap: 2rem;
  margin-top: 20px;
  flex-wrap: wrap;
}

.feature,
.plan {
  background: #1e293b;
  padding: 30px 20px;
  border-radius: 12px;
  width: 30%;
  min-width: 250px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
  border-bottom: 3px solid #06b6d4;
}

.feature:hover,
.plan:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.2);
}

.feature h3,
.plan h3 {
  color: #06b6d4;
  margin-bottom: 15px;
  font-size: 1.3rem;
}

.feature p,
.plan p {
  color: #cbd5e1;
}

.plan .price {
  font-size: 2rem;
  font-weight: bold;
  color: #06b6d4;
  margin: 10px 0;
}

#video-section {
  text-align: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

#video {
  max-width: 100%;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border: 2px solid #06b6d4;
}

#subscribe {
  background: #1e293b;
  text-align: center;
  padding: 60px 20px;
  border-top: 1px solid #06b6d4;
  border-bottom: 1px solid #06b6d4;
}

#subscribe p {
  color: #94a3b8;
  margin-bottom: 20px;
}

#form {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

#email {
  padding: 12px 16px;
  width: 300px;
  max-width: 100%;
  border: 2px solid #334155;
  border-radius: 8px;
  font-size: 16px;
  background-color: #0f172a;
  color: #e2e8f0;
  transition: all 0.3s ease;
}

#email:focus {
  outline: none;
  border-color: #06b6d4;
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}

#email::placeholder {
  color: #64748b;
}

#submit {
  padding: 12px 28px;
  border: none;
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  color: white;
  cursor: pointer;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s ease;
}

#submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(6, 182, 212, 0.4);
}

#submit:active {
  transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
  #header {
    flex-direction: column;
    padding: 1rem;
    gap: 10px;
  }

  #nav-bar {
    flex-direction: row;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-link {
    font-size: 14px;
  }

  .features-container,
  .pricing-container {
    flex-direction: column;
    align-items: center;
  }

  .feature,
  .plan {
    width: 90%;
    margin-bottom: 20px;
  }

  section {
    padding: 80px 15px 40px;
  }

  h2 {
    font-size: 1.5rem;
  }

  #video {
    width: 100%;
    height: auto;
    min-height: 250px;
  }

  #form {
    flex-direction: column;
    align-items: center;
  }

  #email {
    width: 90%;
  }
}

@media (max-width: 480px) {
  #nav-bar {
    gap: 0.5rem;
  }

  .nav-link {
    font-size: 12px;
    padding: 6px 10px;
  }

  .feature,
  .plan {
    width: 95%;
  }

  h2 {
    font-size: 1.3rem;
  }
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #1e293b;
}

::-webkit-scrollbar-thumb {
  background: #06b6d4;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #0891b2;
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}