body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #222;
  background: #fff;
  line-height: 1.6;
}

a {
  color: #1565c0;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 290px;
  height: 100vh;
  overflow-y: auto;
  box-sizing: border-box;
  padding: 32px 24px;
  border-right: 1px solid #e5e5e5;
  background: #fafafa;
}

.profile-img {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 50%;
  display: block;
  margin-bottom: 20px;
}

.role {
  color: #666;
  margin-top: -8px;
}

.sidebar nav {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.content {
  margin-left: 320px;
  padding: 40px 48px;
  max-width: 900px;
}

section {
  margin-bottom: 56px;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.25;
}

h1 {
  font-size: 1.9rem;
  margin-bottom: 8px;
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 18px;
  padding-bottom: 6px;
  border-bottom: 1px solid #eee;
}

h3 {
  font-size: 1.15rem;
}

p {
  margin-top: 0;
}

.item {
  margin-bottom: 22px;
}

.item-title {
  font-weight: 600;
  font-size: 1.04rem;
  margin-bottom: 2px;
}

.item-meta {
  color: #666;
  font-size: 0.88rem;
  margin-top: 2px;
}

.links {
  margin-top: 5px;
  font-size: 0.92rem;
}

.links a {
  margin-right: 0;
}

.empty {
  color: #777;
  font-style: italic;
}

.abstract-btn {
  margin-top: 8px;
  padding: 0;
  font-size: 0.95rem;
  cursor: pointer;
  background: none;
  border: none;
  color: #1565c0;
}

.abstract-btn:hover {
  text-decoration: underline;
}

.abstract {
  margin-top: 8px;
  font-size: 0.94rem;
  line-height: 1.55;
  color: #333;
}

.hidden {
  display: none;
}

strong {
  font-weight: 700;
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: auto;
    height: auto;
    border-right: none;
    border-bottom: 1px solid #e5e5e5;
  }

  .content {
    margin-left: 0;
    padding: 24px;
  }

  .profile-img {
    width: 130px;
    height: 130px;
  }
}