/* === RESET === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Segoe UI', sans-serif;
  color: #333;
  line-height: 1.6;
  background-color: #fff;
}
a {
  text-decoration: none;
  color: inherit;
}

/* === CONTAINER === */
.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

/* === HEADER === */
.header {
  background-color: #fff;
  border-bottom: 1px solid #e2e2e2;
  position: sticky;
  top: 0;
  z-index: 999;
}
.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 0;
}
.logo {
  height: 55px;
  object-fit: contain;
}
.nav-menu {
  list-style: none;
  display: flex;
  gap: 25px;
}
.nav-menu li a {
  font-weight: 500;
  color: #222;
  transition: color 0.3s ease;
}
.nav-menu li a:hover {
  color: #0f9d58;
}

/* === ALERT === */
.alert {
  background: #ffe8e8;
  color: #c60000;
  text-align: center;
  font-size: 14px;
  padding: 10px 5px;
}

/* === HERO SECTION === */
.hero {
  background: #c8f7c5 url('https://www.transparenttextures.com/patterns/skulls.png') repeat;
  padding: 80px 20px;
  text-align: center;
}
.hero-container h1 {
  font-size: 2.5rem;
  max-width: 900px;
  margin: auto;
  color: #222;
}
.hero-container .highlight {
  color: #0f9d58;
  font-weight: bold;
}
.hero-container p {
  margin: 20px auto 30px;
  font-size: 1.1rem;
  max-width: 700px;
  color: #444;
}
.btn-primary {
  display: inline-block;
  background: #000;
  color: #fff;
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: bold;
  transition: background 0.3s ease;
}
.btn-primary:hover {
  background: #333;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-menu {
    flex-direction: column;
    width: 100%;
    margin-top: 10px;
  }
  .hero-container h1 {
    font-size: 1.8rem;
  }
  .btn-primary {
    width: 100%;
    text-align: center;
  }
}
/* Section Styling */
.demo-section {
  background-color: #e7c6ff;
  padding: 60px 20px;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: auto;
}

.section-title {
  text-align: center;
  color: #5e548e;
  font-size: 2rem;
  margin-bottom: 40px;
  font-weight: bold;
}

.demo-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 50px;
  background-color: #ffd6ff;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.demo-item.reverse {
  flex-direction: row-reverse;
}

.demo-item img {
  flex: 1 1 300px;
  max-width: 100%;
  border-radius: 12px;
  margin: 10px;
}

.demo-text {
  flex: 1 1 300px;
  padding: 20px;
}

.demo-text h3 {
  color: #3c096c;
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.demo-text p {
  color: #4a4e69;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
  .demo-item, .demo-item.reverse {
    flex-direction: column;
  }
}
.video-demo {
  background-color: #c8b6ff;
  padding: 60px 20px;
  text-align: center;
}

.video-demo .section-title {
  font-size: 2rem;
  color: #3c096c;
  margin-bottom: 30px;
  font-weight: bold;
}

.video-wrapper {
  max-width: 800px;
  margin: 0 auto;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.video-wrapper iframe {
  width: 100%;
  height: 450px;
  border: none;
}

.video-caption {
  margin-top: 15px;
  font-size: 1rem;
  color: #3c096c;
  background-color: #bbd0ff;
  display: inline-block;
  padding: 10px 20px;
  border-radius: 12px;
  margin-top: 20px;
}
<style>
  .contact-form input,
  .contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
  }

  .contact-form input:focus,
  .contact-form textarea:focus {
    border-color: #b8c0ff;
    outline: none;
  }

  @media screen and (max-width: 600px) {
    .contact-form {
      grid-template-columns: 1fr;
    }

    .contact-form textarea {
      grid-column: span 1 !important;
    }
  }
</style>