:root {
    --primary-blue: #1950c7;
    --light-blue: #60a5fa;
    --dark-blue: #0a298f;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --border-light: #e2e8f0;
    --link-color: #1950c7;
    --pre-bg: #ecf0f1ab;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

h1 {
    color: var(--text-dark);
    border-bottom: 3px solid var(--light-blue);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

h2 {
    color: var(--text-dark);
    margin-top: 30px;
    margin-bottom: 15px;
}

p {
    margin: 10px 0;
    font-size: 1.1em;
}

.abstract p {
    text-align: justify;
    font-style: italic;
    font-size: 0.95em;
    background-color: var(--bg-white);
    border-left: 4px solid var(--light-blue);
    padding: 15px 20px;
    margin: 20px 0;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

pre {
    background-color: var(--bg-white);
    border-left: 4px solid var(--light-blue);
    padding: 20px 15px 0 15px;
    border-radius: 4px;
    overflow-x: auto;
}

code {
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--text-dark);
}

#bibtex-block {
  cursor: pointer;
  position: relative;
  transition: background 0.2s;
}
#bibtex-block:hover {
  background: #f0f0f0;
}
#bibtex-block.copied::after {
  content: "Copied!";
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 0.8em;
  color: #4caf50;
  font-family: sans-serif;
}