body {
  font-family: system-ui, sans-serif;
  font-size: 1rem;
  background: #1d0036;
  color: #ffffff;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

a {
  color: aqua;
}

html {
  scroll-behavior: smooth;
}

/* Header */
header {
  text-align: center;
  line-height: 1.6;
  margin-bottom: 40px;
  padding: 35px 20px;
  border-bottom: 2px solid #ddd;
  background: url(../img/wp.jpg);
  background-size: cover;
  background-position: center;
}

header .menu-nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

header .menu-nav ul li.btn {
  list-style-type: none;
}

header .menu-nav ul li.btn a {
  color: #ffffff;
  text-decoration: none;
  padding: 10px 15px;
}

header .menu-nav ul li.btn a:hover {
  border-radius: 8px;
  border: 2px solid #1d0036;
  background-color: #1d0036;
  color: #ddd;
  transition: 0.5s;
}

/* Sidebar */
.index {
  position: fixed;
  top: 250;
  left: 20px;
  width: 260px;
  background: rgba(255,255,255,0.08);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  max-height: calc(100vh - 220px);
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.index h3 {
  margin: 0 0 15px 0;
  color: #bb86fc;
  text-align: center;
  font-size: 1.2rem;
}

#index-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

#index-list li {
  margin: 10px 0;
}

#index-list a {
  color: #ddd;
  text-decoration: none;
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  transition: all 0.2s;
}

#index-list a:hover {
  background: rgba(255,255,255,0.1);
  color: white;
  padding-left: 15px;
}

/* Main content */


.profile {
  margin: 20px auto;
  max-width: 800px;
  text-align: center;
}

.profile .citation {
  font-size: 14;
}

.profile ul li {
  list-style: none;
} 

.profile img {
  max-width: 30%;
  margin: 25px auto;
}

.content {
  margin: 20px auto;
  max-width: 800px;
  padding: 20px;
}

.article {
  background: rgb(92, 0, 110);
  padding: 30px;
  margin-bottom: 30px;
  border-radius: 8px;
}

.article a {
  color: aqua;
}

Aarticle a::after {
  color: rgb(0, 127, 127);
}

.article img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 20px 0;
  display: block;
}

/* Mobile */
@media (max-width: 900px) {
  .index {
    position: relative;
    width: 90%;
    left: 0;
    top: 0;
    margin-bottom: 30px;
    max-height: none;
  }
  
  .content {
    margin-left: 0;
    padding: 10px 15px;
  }
  
  header {
    padding: 25px 15px;
  }
}

footer {
  border-top: 2px solid #ddd;
  padding: 30px 20px;
  margin-top: 30px;
  text-align: center;
  background-color: rgb(37, 0, 44);
}