:root {
  color-scheme: light;
  --bg: #f5f4f0;
  --panel: #ffffff;
  --line: #d7d3c8;
  --text: #1f1f1f;
  --muted: #5b5b56;
  --added: #d9f2dc;
  --removed: #ffdfe0;
  --changed: #fff3cf;
  --accent: #144c6b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, #ece6d2 0%, transparent 40%),
    radial-gradient(circle at 80% 90%, #d8ebf2 0%, transparent 35%),
    var(--bg);
}

header {
  padding: 1rem 1.2rem 0.4rem;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
}

header p {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  padding: 0.8rem 1.2rem 1rem;
}

label {
  font-size: 0.95rem;
}

select {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 0.32rem 0.5rem;
  min-width: 7rem;
}

.checkbox {
  margin-left: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

main {
  display: grid;
  grid-template-columns: minmax(320px, 42%) 1fr;
  gap: 1rem;
  padding: 0 1.2rem 1.2rem;
}

section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.anchor-list-section,
.detail-section {
  min-height: 68vh;
  display: flex;
  flex-direction: column;
}

h2 {
  margin: 0;
  padding: 0.85rem 0.9rem 0.5rem;
  border-bottom: 1px solid var(--line);
  font-size: 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
}

thead th {
  text-align: left;
  padding: 0.5rem 0.65rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--muted);
  position: sticky;
  top: 0;
  background: #fbfaf8;
}

tbody {
  display: block;
  overflow: auto;
  height: calc(68vh - 4.2rem);
}

thead,
tbody tr {
  display: table;
  width: 100%;
  table-layout: fixed;
}

td {
  padding: 0.5rem 0.65rem;
  border-bottom: 1px solid #efede6;
  vertical-align: top;
  font-size: 0.92rem;
}

tr {
  cursor: pointer;
}

tr:hover {
  background: #f8f6ef;
}

tr.active {
  background: #edf5f8;
}

.status-chip {
  display: inline-block;
  border-radius: 999px;
  padding: 0.12rem 0.52rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.status-equal {
  background: #e9f2eb;
}

.status-changed {
  background: var(--changed);
}

.status-added {
  background: var(--added);
}

.status-removed {
  background: var(--removed);
}

.meta {
  padding: 0.5rem 0.9rem;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  min-height: 2.2rem;
}

.detail-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: 1fr 1fr;
  padding: 0.8rem;
  min-height: 0;
}

article {
  min-width: 0;
}

h3 {
  margin: 0 0 0.45rem;
  font-size: 0.95rem;
}

.text-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.7rem;
  line-height: 1.46;
  white-space: pre-wrap;
  overflow: auto;
  min-height: calc(68vh - 9.4rem);
  background: #fcfcfb;
}

.token-added {
  background: var(--added);
}

.token-removed {
  background: var(--removed);
  text-decoration: line-through;
}

.empty {
  color: #8f8d83;
  font-style: italic;
}

@media (max-width: 960px) {
  main {
    grid-template-columns: 1fr;
  }

  .detail-grid {
    grid-template-columns: 1fr;
  }

  tbody {
    height: 44vh;
  }

  .text-box {
    min-height: 28vh;
  }
}