:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1d2330;
  --muted: #6b7280;
  --border: #dde1e7;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --danger: #dc2626;
  --row-alt: #fafbfc;
  --hover: #eef3fe;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1c1f25;
    --text: #e6e8eb;
    --muted: #9aa1ac;
    --border: #2f343c;
    --accent: #3b82f6;
    --row-alt: #20242a;
    --hover: #26303f;
  }
}

* { box-sizing: border-box; }

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

[hidden] { display: none !important; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar h1 { font-size: 18px; margin: 0; }

.topbar-end { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }

.actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.lang { display: flex; align-items: center; gap: 6px; }

main { flex: 1; padding: 24px; }

a { color: var(--accent); }

.footer {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

.muted { color: var(--muted); }

button, .button {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.dropzone {
  max-width: 560px;
  margin: 48px auto;
  padding: 48px 24px;
  text-align: center;
  border: 2px dashed var(--border);
  border-radius: 12px;
  background: var(--surface);
  transition: border-color .15s, background .15s;
}

.dropzone p { margin: 4px 0; }
.dropzone .button { margin-top: 8px; }

body.dragging .dropzone {
  border-color: var(--accent);
  background: var(--hover);
}

.panel {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.panel h2 { font-size: 16px; margin-top: 0; }
.panel h3 { font-size: 14px; margin: 20px 0 8px; }

.options { display: flex; gap: 24px; flex-wrap: wrap; align-items: center; }
.options label { display: flex; align-items: center; gap: 8px; }

select, input[type="text"] {
  font: inherit;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

.column-names {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
}

.column-names label { display: flex; flex-direction: column; gap: 2px; font-size: 12px; color: var(--muted); }
.column-names input { width: 100%; }

.panel-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }

.table-wrap {
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.table-wrap.preview { max-height: 260px; }

table { border-collapse: collapse; width: max-content; min-width: 100%; }

th, td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  border-inline-end: 1px solid var(--border);
  text-align: start;
  vertical-align: top;
  max-width: 320px;
  white-space: pre-wrap;
  word-break: break-word;
}

thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface);
  font-weight: 600;
  box-shadow: 0 1px 0 var(--border);
}

tbody tr:nth-child(even) { background: var(--row-alt); }
tbody tr.selected, tbody tr.selected td.rownum { background: var(--hover); }

#dataTable td.cell, #dataTable th .col-name { cursor: text; }
#dataTable td.cell:hover { background: var(--hover); }

td.rownum, th.rownum {
  color: var(--muted);
  text-align: end;
  white-space: nowrap;
  width: 1%;
  position: sticky;
  inset-inline-start: 0;
  background: var(--surface);
}

thead th.rownum { z-index: 2; }

.th-inner { display: flex; align-items: center; justify-content: space-between; gap: 8px; }

.delete {
  padding: 0 6px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.4;
}

.delete:hover { color: var(--danger); }

td.editing, th.editing { padding: 2px; }
td.editing input, th.editing input { width: 100%; min-width: 120px; }

.hint { margin: 0 0 8px; }

.table-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.table-tools button.active { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }

td.rownum input[type="checkbox"] { margin-inline-end: 4px; vertical-align: middle; }

.toggle { display: inline-flex; }
.toggle button { border-radius: 0; }
.toggle button:first-child { border-start-start-radius: 6px; border-end-start-radius: 6px; }
.toggle button:last-child { border-start-end-radius: 6px; border-end-end-radius: 6px; margin-inline-start: -1px; }
.toggle button.active { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }

button.danger { color: var(--danger); }
button:disabled { opacity: .4; cursor: default; }

.rowlink {
  padding: 0;
  border: none;
  background: transparent;
  color: var(--accent);
  text-decoration: underline;
}

.record, .record-mode .hint { max-width: 960px; margin-inline: auto; }

.record-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.record-nav label { display: flex; align-items: center; gap: 6px; }
.record-nav input[type="number"] {
  width: 90px;
  font: inherit;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}
.record-nav .danger { margin-inline-start: auto; }

#recordTable th {
  position: static;
  width: 30%;
  box-shadow: none;
  cursor: text;
}
#recordTable td { max-width: none; cursor: text; }
#recordTable td:hover, #recordTable th:hover { background: var(--hover); }
#recordTable .colnum { color: var(--muted); font-weight: normal; margin-inline-end: 6px; }

/* ---------- Changelog ---------- */

.home { color: inherit; text-decoration: none; }

.changelog { width: 100%; max-width: 720px; margin-inline: auto; box-sizing: border-box; }
.changelog h2 { margin: 16px 0 24px; }

.timeline { list-style: none; margin: 0; padding: 0; }

.release {
  position: relative;
  padding-inline-start: 28px;
  padding-bottom: 28px;
  border-inline-start: 2px solid var(--border);
  margin-inline-start: 6px;
}
.release:last-child { border-color: transparent; padding-bottom: 0; }

/* Dot on the timeline line. */
.release::before {
  content: '';
  position: absolute;
  inset-inline-start: -8px;
  top: 2px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: var(--bg);
}
.release:first-child::before { background: var(--accent); }

.release-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.release-version { font-weight: 600; font-size: 16px; color: var(--text); text-decoration: none; }
.release-version:hover { text-decoration: underline; }
.release-latest {
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 12px;
}
.release ul { margin: 0; padding-inline-start: 18px; }
.release:target .release-version { color: var(--accent); }