body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #FDFBF7;
  color: #2B2B2B;
}

#main {
  transition: margin-left 0.5s;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #1E3A5F;
  color: #F0F4F8;
  padding: 20px 40px;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-size: 1.5em;
  font-weight: bold;
  text-decoration: none;
  color: #F0F4F8;
}

.hamburger {
  font-size: 1.5em;
  cursor: pointer;
}

.sidebar {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 999;
  top: 0;
  left: 0;
  background-color: #1E3A5F;
  color: #2B2B2B;
  overflow-x: hidden;
  transition: width 0.5s;
  padding-top: 80px;
}

.sidebar.open {
  width: 250px;
}

.sidebar.open ~ #main {
  margin-left: 250px;
}

.sidebar ul {
  list-style: none;
  padding: 0;
}

.sidebar ul li {
  padding: 15px 25px;
}

.sidebar ul li a {
  color: #B0BEC5;
  text-decoration: none;
  display: block;
}

.sidebar ul li a.active {
  font-weight: bold;
  color: #B0BEC5;
}

main {
  padding: 60px 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.2em;
  margin-bottom: 20px;
  text-align: center;
  color: #168FDA;
}

.hero p {
  font-size: 1.1em;
  line-height: 1.6;
  text-align: center;
  color: #1A1A1A;
}

.hero .btn_learn {
  border: 2px solid #168FDA;   
  color: #1A1A1A;
  background-color: transparent;
  padding: 10px 15px;
  border-radius: 6px;
  display: inline-block;
  font-size: 16px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  appearance: none;
  margin: 20px auto 0;
}

.hero {
  text-align: center;
}

.hero .btn_learn:hover {
  background-color: #168FDA;
  color: #F0FAF8;
}

.collapsible {
  background-color: #E8E3D9;
  color: #1E3A5F;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.collapsible:hover {
  background-color: #168FDA;
  color: #FDFBF7;
}

.collapsible.active {
  background-color: #1E3A5F
  color: #F0F4F8;
}

.content {
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  background-color: #FDFBF7;
  border-left: 3px solid #168FDA;
  color: #2B2B2B
}

.mission-statement {
  margin-top: 80px;
}

footer {
  background-color: #E8E3D9;
  color: #F0F4F8;
  padding: 40px 20px;
  text-align: center;
  margin-top: 100px;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.contact-info p {
  margin: 8px 0;
}

.social-media a {
  margin: 0 10px;
  color: #168FDA;
  text-decoration: none;
}

.footer-bottom {
  margin-top: 20px;
  font-size: 0.9em;
  color: #E8E3D9;
}