html, body {
  background: #f4f8fb !important;
}

.menu-toggle {
  position: fixed;
  top: 24px;
  left: 24px;
  width: 40px;
  height: 40px;
  background: #2B4D89;
  border: none;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 1100;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(43,77,137,0.10);
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background: #fff;
  margin: 3px 0;
  border-radius: 2px;
  transition: all 0.2s;
}

.sidebar {
  position: fixed;
  left: -260px;
  top: 0;
  width: 240px;
  height: 100vh;
  background: #2B4D89;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 2px 0 8px rgba(0,0,0,0.05);
  z-index: 1000;
  transition: left 0.3s cubic-bezier(.4,0,.2,1);
}
.sidebar.open {
  left: 0;
}

.sidebar .logo {
  margin: 32px 0 24px 0;
}
.sidebar .logo img {
  width: 120px;
  display: block;
}

.sidebar nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 100%;
}
.sidebar nav ul li {
  width: 100%;
}
.sidebar nav ul li a {
  display: block;
  padding: 16px 32px;
  color: #fff;
  text-decoration: none;
  font-size: 1.1em;
  transition: background 0.2s, color 0.2s;
}
.sidebar nav ul li.active a,
.sidebar nav ul li a:hover {
  background: #3CB371;
  color: #fff;
}

.coming-soon {
  margin-top: 32px;
  color: #fff;
  font-size: 1.1em;
  text-align: center;
  opacity: 0.8;
  font-style: italic;
}

.notice {
  background: #2B4D89;
  color: #fff;
  padding: 16px 24px;
  border-radius: 8px;
  margin-bottom: 2em;
  font-size: 1.1em;
  box-shadow: 0 2px 8px rgba(43,77,137,0.10);
}

main {
  margin-left: 0;
  padding: 48px 32px;
  min-height: 100vh;
  background: #f4f8fb;
  box-sizing: border-box;
  transition: margin-left 0.3s cubic-bezier(.4,0,.2,1);
}

.sidebar.open ~ main {
  margin-left: 240px;
}

.main-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px;
  background: #f4f8fb;
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(43,77,137,0.07);
}

.main-section h1 {
  color: #2B4D89;
  margin-bottom: 0.2em;
}
.main-section h2 {
  color: #3CB371;
  margin-top: 0;
  margin-bottom: 1.5em;
}

.chapter-subtitle {
  font-size: 2em;
  color: #3CB371;
  margin-top: 0;
  margin-bottom: 1.5em;
  font-weight: bold;
  text-align: center;
}
.centered-notice {
  text-align: center;
}

.group-photo-container {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 2em;
}
.group-photo-img {
  width: 100%;
  max-width: 700px;
  height: auto;
  object-fit: cover;
  border-radius: 0;
  box-shadow: 0 2px 8px rgba(43,77,137,0.10);
}

.main-logo, .large-logo {
  width: 260px;
  max-width: 95vw;
  height: auto;
  display: block;
  margin: 0 auto 40px auto;
}
.main-title, .larger-title {
  font-size: 3.2em;
  color: #2B4D89;
  margin-bottom: 0.2em;
  text-align: center;
}

.interest-form-section {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-top: 2em;
  background: #f4f8fb;
  border: 2px solid #2B4D89;
  border-radius: 0;
  box-shadow: 0 2px 8px rgba(43,77,137,0.07);
  padding: 24px 32px;
  justify-content: flex-start;
}
.interest-form-image {
  width: 120px;
  height: 120px;
  background: #3CB371;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  box-shadow: 0 2px 8px rgba(60,179,113,0.10);
  padding: 0;
}
.form-logo-img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}
.interest-form-link {
  flex: 1;
}
.interest-form-link.prominent {
  display: flex;
  justify-content: center;
  margin: 32px 0 32px 0;
}
.interest-btn {
  display: inline-block;
  padding: 24px 48px;
  background: #2B4D89;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1.5em;
  font-weight: bold;
  transition: background 0.2s, color 0.2s;
  box-shadow: 0 4px 16px rgba(43,77,137,0.15);
  border: none;
}
.interest-btn:hover {
  background: #3CB371;
  color: #fff;
}

.top-right-icons {
  position: fixed;
  top: 24px;
  right: 32px;
  display: flex;
  gap: 16px;
  z-index: 1200;
}
.icon-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: #fff;
  border: 2px solid #2B4D89;
  border-radius: 0;
  box-shadow: 0 2px 8px rgba(43,77,137,0.10);
  transition: background 0.2s, border 0.2s;
}
.icon-link:hover {
  background: #3CB371;
  border-color: #3CB371;
}
.social-icon {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.centered-logo {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 48px 0 32px 0;
}
.centered-logo img {
  width: 260px;
  max-width: 95vw;
  height: auto;
  display: block;
}

@media (max-width: 800px) {
  .sidebar {
    width: 200px;
    left: -210px;
  }
  .sidebar.open {
    left: 0;
  }
  .menu-toggle {
    top: 16px;
    left: 12px;
    width: 36px;
    height: 36px;
  }
  .sidebar .logo img {
    width: 40px;
  }
  .sidebar nav ul li a {
    padding: 12px 8px;
    font-size: 0.95em;
    text-align: center;
  }
  main {
    margin-left: 0;
    padding: 24px 8px;
  }
  .main-section {
    padding: 16px;
  }
  .interest-form-section {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 8px;
  }
  .interest-form-image {
    width: 80px;
    height: 80px;
  }
  .form-logo-img {
    width: 48px;
    height: 48px;
  }
  .top-right-icons {
    top: 12px;
    right: 8px;
    gap: 8px;
  }
  .icon-link {
    width: 36px;
    height: 36px;
  }
  .social-icon {
    width: 20px;
    height: 20px;
  }
  .group-photo-img {
    max-width: 100%;
  }
  .interest-form-link.prominent {
    margin: 20px 0 20px 0;
  }
  .interest-btn {
    padding: 16px 16px;
    font-size: 1.1em;
  }
  .centered-logo img,
  .main-logo, .large-logo {
    width: 140px;
  }
  .main-title, .larger-title {
    font-size: 1.7em;
  }
}