body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Roboto", sans-serif;
  background-color: #0d005d;
  color: #fff;
  box-sizing: border-box;
}

main {
  flex: 1;
  padding-top: 96px;
}

footer {
  margin-top: auto;
  padding: 1.5rem 1rem 1rem;
  background-color: #393FAB;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto 1rem;
  text-align: center;
}

.footer-column h4 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: #ffffff;
}

.footer-column a {
  display: block;
  margin-bottom: 0.45rem;
  color: #dfe6ff;
  text-decoration: none;
}

.footer-column a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.copyright {
  margin: 0;
  text-align: center;
  font-size: 0.95rem;
  color: #e7ebff;
}

.banner {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background-color: #647ef8;
  z-index: 10;
  box-sizing: border-box;
}

.menu-button {
  background: none;
  border: none;
  color: #fff;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-button img {
  width: 32px;
  height: 32px;
  display: block;
}

.banner-title-button {
  flex: 1 1 auto;
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.banner-title {
  margin: 0;
  padding-left: 0;
  cursor: pointer;
  line-height: 1.2;
}

.logout-button {
  margin-left: auto;
  cursor: pointer;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.2rem;
}

.profile-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: block;
  object-fit: cover;
  border: 2px solid #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.sidebar {
  position: fixed;
  top: 64px;
  left: -200px;
  width: 200px;
  height: calc(100% - 64px);
  background: #647ef8;
  transition: left 0.3s ease;
  z-index: 5;
  box-shadow: 4px 0 12px rgba(0, 0, 0, 0.3);
}

.sidebar.open {
  left: 0;
}

.sidebar a {
  display: block;
  color: #fff;
  padding: 14px 24px;
  text-decoration: none;
  font-weight: 600;
}

.sidebar a:hover {
  background: #4e63d7;
  color: #f5f5f5;
}

.index-title {
  width: min(900px, 100%);
  margin: 0 auto 1.5rem;
  padding: 0;
  font-size: 3rem;
  text-align: center;
}

.index-text {
  width: min(900px, 100%);
  margin: 0 auto;
  padding: 0;
  font-size: 2rem;
  text-align: center;
}

.index-image {
  display: block;
  width: min(560px, 56vw);
  height: auto;
  margin: 0 auto 1.25rem;
  flex-shrink: 0;
  border-radius: 8px;
}