/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Base */
body {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 16px;
  line-height: 1.75;
  color: #222;
  background: #f7f7f5;
}

.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 28px;
}

/* Header */
header {
  border-bottom: 2px solid #2c5f8a;
  padding: 36px 0 18px;
  margin-bottom: 44px;
}

header h1 {
  font-size: 1.75rem;
  font-weight: normal;
  letter-spacing: 0.02em;
  color: #2c5f8a;
}

nav {
  margin-top: 12px;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.88rem;
  color: #666;
}

nav a {
  color: #555;
  text-decoration: none;
  margin-right: 22px;
}

nav a:hover {
  color: #2c5f8a;
  text-decoration: underline;
}

nav a.active {
  color: #2c5f8a;
  font-weight: 600;
}

/* Typography */
h2 {
  font-size: 1.2rem;
  font-weight: bold;
  margin: 28px 0 6px;
}

p {
  margin-bottom: 14px;
}

/* Abstract block */
.abstract {
  background: #eef2f6;
  border-left: 4px solid #2c5f8a;
  padding: 14px 20px;
  margin: 16px 0 20px;
  font-style: italic;
  font-size: 0.95rem;
  color: #333;
}

/* Paper image */
.paper-image {
  float: right;
  margin: 0 0 20px 28px;
  max-width: 260px;
  border: 1px solid #ddd;
}

.paper-image img {
  display: block;
  width: 100%;
  height: auto;
}

/* Downloads / links list */
.links-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 20px;
}

.links-list li {
  margin: 8px 0;
  padding-left: 16px;
  position: relative;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.95rem;
}

.links-list li::before {
  content: "\203a";
  position: absolute;
  left: 0;
  color: #2c5f8a;
}

/* Paper list on main page */
.paper-entry {
  margin-bottom: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid #ddd;
}

.paper-entry:last-of-type {
  border-bottom: none;
}

.paper-entry h2 {
  margin-top: 0;
}

.paper-meta {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.85rem;
  color: #777;
  margin-bottom: 10px;
}

/* Acknowledgements */
.acknowledgements {
  font-size: 0.9rem;
  color: #555;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid #e0e0e0;
}

/* Links */
a {
  color: #2c5f8a;
  text-decoration: underline;
}

a:visited {
  color: #1a4a6e;
}

a:hover {
  color: #4a90c4;
}

/* Footer */
footer {
  border-top: 1px solid #ddd;
  margin-top: 52px;
  padding: 20px 0 36px;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.82rem;
  color: #999;
}

/* Clearfix */
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

/* Responsive */
@media (max-width: 600px) {
  .paper-image {
    float: none;
    margin: 0 0 20px 0;
    max-width: 100%;
  }

  header h1 {
    font-size: 1.4rem;
  }
}