:root {
  --bg: #15171c;
  --panel: #1d2027;
  --panel-2: #242832;
  --border: #323743;
  --text: #dde1e8;
  --dim: #99a0ad;
  --faint: #6c7381;
  --accent: #7fb0ff;
  --accent-bg: #253552;
  --good: #8fcf7a;
  --bad: #ff8a9a;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}

main {
  max-width: 1480px;
  margin: 0 auto;
  padding: 20px 16px 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.brand h1 { font-size: 22px; margin: 0; letter-spacing: 0.2px; }
.brand p { margin: 0; color: var(--dim); font-size: 14.5px; }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 16px;
  align-items: start;
}
@media (max-width: 900px) {
  .workspace { grid-template-columns: minmax(0, 1fr); }
}

section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  min-width: 0;
}

.bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.label { font-weight: 600; }
#status, #treeinfo { color: var(--dim); font-size: 13.5px; }
#status.error { color: var(--bad); }

button, select {
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 12px;
  min-height: 34px;
  cursor: pointer;
}
select { max-width: 100%; }
button#run { background: var(--accent-bg); border-color: #3b5a8f; color: #e6efff; font-weight: 600; }
button:hover:not(:disabled), select:hover { border-color: #4a5263; }
button:disabled { opacity: 0.5; cursor: default; }
button:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

textarea {
  display: block;
  width: 100%;
  min-height: 260px;
  resize: vertical;
  background: #111318;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font: 14px/1.55 var(--mono);
  tab-size: 2;
}

#output { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }

.result {
  border-top: 1px solid var(--border);
  padding-top: 8px;
  min-width: 0;
}
.result .sql {
  font: 13px/1.45 var(--mono);
  color: var(--dim);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 4.4em;
  overflow: hidden;
}
.result .plan { font: 13px/1.45 var(--mono); color: var(--accent); margin-top: 4px; overflow-wrap: anywhere; }
.result .plan b { color: var(--faint); font-weight: 400; margin-right: 6px; }
.result .note { color: var(--good); font-size: 13.5px; margin-top: 4px; }
.result .error { color: var(--bad); font: 13.5px/1.45 var(--mono); margin-top: 4px; white-space: pre-wrap; overflow-wrap: anywhere; }

.table-wrap { overflow-x: auto; margin-top: 6px; max-height: 420px; overflow-y: auto; }
table { border-collapse: collapse; font: 13.5px/1.4 var(--mono); }
th, td { border: 1px solid var(--border); padding: 3px 8px; text-align: left; vertical-align: top; white-space: pre; }
th { background: var(--panel-2); color: var(--dim); font-weight: 600; position: sticky; top: 0; }
td.null { color: var(--faint); font-style: italic; }
td.num { text-align: right; }

#tree {
  position: relative;
  overflow: auto;
  min-height: 220px;
  max-height: 78vh;
  padding: 4px 2px 8px;
}
#tree .empty { color: var(--faint); margin: 8px 4px; }
#tree svg.edges { position: absolute; left: 0; top: 0; pointer-events: none; }
#tree svg.edges line { stroke: #465068; stroke-width: 1.2; }
.levels { position: relative; display: flex; flex-direction: column; gap: 34px; width: max-content; min-width: 100%; }
.level { display: flex; gap: 8px; justify-content: center; }
.node {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 7px 5px;
  font: 12.5px/1.35 var(--mono);
  min-width: 64px;
  max-width: 190px;
}
.node.leaf { border-color: #3d4a3a; }
.node .head { color: var(--faint); font-size: 11.5px; white-space: nowrap; }
.node .key { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.node .more { color: var(--faint); }
.node .fill { height: 3px; background: #2b303a; border-radius: 2px; margin-top: 4px; }
.node .fill i { display: block; height: 100%; background: var(--good); border-radius: 2px; }
.node.internal .fill i { background: var(--accent); }
.hidden-note { color: var(--faint); font-size: 13px; margin: 10px 4px 0; }

/* ---- the open database, SQLite files ---- */
.dbline { display: flex; gap: 6px 14px; flex-wrap: wrap; align-items: baseline; margin: -2px 0 10px; font-size: 13.5px; }
#dbinfo { color: var(--text); font-family: var(--mono); font-size: 13px; overflow-wrap: anywhere; }
.info { color: var(--dim); font-size: 13px; }

#drop {
  position: fixed;
  inset: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  border: 2px dashed var(--accent);
  border-radius: 14px;
  background: rgba(21, 23, 28, 0.88);
  color: var(--text);
  font-size: 17px;
  z-index: 10;
  pointer-events: none;
}
#drop[hidden] { display: none; }

.node.clickable { cursor: pointer; }
.node.clickable:hover { border-color: #5a6478; }
.node.current { outline: 2px solid var(--accent); outline-offset: 1px; }

#pagearea { border-top: 1px solid var(--border); margin-top: 10px; padding-top: 10px; }
#pagearea[hidden] { display: none; }

#filemap { display: flex; flex-wrap: wrap; gap: 2px; margin-bottom: 12px; max-height: 168px; overflow-y: auto; }
#filemap i { width: 9px; height: 9px; border-radius: 1.5px; cursor: pointer; opacity: 0.4; }
#filemap.dense { gap: 1px; }
#filemap.dense i { width: 6px; height: 6px; border-radius: 1px; }
#filemap i.mine { opacity: 1; }
#filemap i.current { outline: 2px solid #fff; outline-offset: 0; opacity: 1; }
.p-table-leaf { background: #4f86d9; }
.p-table-interior { background: #9cc0ff; }
.p-index-leaf { background: #5aa86a; }
.p-index-interior { background: #a7dca0; }
.p-overflow { background: #d0a14a; }
.p-freelist-trunk { background: #8a8f9a; }
.p-freelist-leaf { background: #565b66; }
.p-lock-byte { background: #b35a6a; }
.p-unknown { background: #3a3f4a; }

#pagebar {
  position: relative;
  height: 30px;
  background: #111318;
  border: 1px solid var(--border);
  border-radius: 5px;
  overflow: hidden;
}
#pagebar i { position: absolute; top: 0; bottom: 0; min-width: 1px; }
#pagescale { display: flex; justify-content: space-between; color: var(--faint); font: 11px/1.6 var(--mono); }
#legend { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 4px 0 8px; color: var(--dim); font-size: 12.5px; }
#legend span { display: inline-flex; align-items: center; gap: 5px; }
#legend i { display: inline-block; width: 11px; height: 11px; border-radius: 2px; }
.r-file-header { background: #b07ad9; }
.r-page-header { background: #e0b04f; }
.r-pointers { background: #d97a4f; }
.r-unallocated { background: #23262e; }
.r-cell { background: #4f86d9; cursor: pointer; }
.r-cell.odd { background: #3d6db8; }
.r-freeblock { background: #5aa86a; }
.r-fragment { background: #d9566e; }
#legend .r-unallocated { border: 1px solid var(--border); }
#cells .table-wrap { max-height: 300px; }
#cells tr.current td { background: var(--accent-bg); }