:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #17181c;
  --muted: #5b5f6a;
  --line: #dfe3ea;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
header {
  background: black;
  color: white;
  padding: 2.25rem 1.25rem;
  text-align: center;
}
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}
main {
  padding: 2rem 0 3rem;
}
section {
  margin: 2rem 0;
}
h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 2vw + 1rem, 2.4rem);
}
h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}
p {
  color: var(--muted);
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem;
  flex: 1;
}

/* ====== Nav (Flexbox requirement) ====== */
nav {
  margin-top: 1rem;
}
.nav-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
  font-size: 0.95rem;
}
.chip:hover {
  background: rgba(255, 255, 255, 0.14);
}

figure {
  margin: 0;
}
figcaption {
  color: var(--muted);
  margin: 0 0 0.75rem;
}
.table-wrap {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--line);
}
table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}
thead th {
  background: #f1f3f7;
}
th,
td {
  padding: 0.7rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}
tbody tr:hover {
  background: #fafbff;
}

#analysis {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem;
  padding-bottom: 0.5rem;
  flex: 1;
}

.analysis-grid {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ====== Definition list (Glossary) ====== */
dl {
  margin: 0;
}
dt {
  font-weight: 650;
  margin-top: 1rem;
}
dd {
  margin: 0.35rem 0 0 0;
  color: var(--muted);
  padding-left: 0.75rem;
  border-left: 3px solid #e8ebf2;
}

/* ====== Footer ====== */
footer {
  border-top: 1px solid var(--line);
  padding: 1.25rem 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.small {
  font-size: 0.9rem;
}