* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: #f6f7fb;
  color: #1c1e26;
  font-family: Inter, system-ui, sans-serif;
}

/* Header */
.bib-hero {
  text-align: center;
  padding: 4rem 1rem 3rem;
}

.bib-hero h1 {
  font-size: clamp(2.2rem, 4vw, 3rem);
  margin-bottom: 0.5rem;
}

.bib-hero p {
  color: #555;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.5;
}

.bib-hero span {
  display: block;
  font-style: italic;
  margin-top: 0.3rem;
}

/* Bibliography container */
.bibliography {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
  display: grid;
  gap: 1.5rem;
}

/* Entry card */
.bib-entry {
  background: #ffffff;
  border-radius: 14px;
  padding: 1.5rem 1.75rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.06);
}

/* Citation */
.citation {
  font-size: 0.95rem;
  line-height: 1.6;
  font-weight: 500;
}

/* Annotation */
.annotation {
  margin-top: 0.75rem;
  padding-left: 1rem;
  border-left: 3px solid #e3e5ee;
  color: #444;
  font-size: 0.9rem;
  line-height: 1.6;
}