:root {
  --bg: #15171c;
  --panel: #1c1f26;
  --border: #2d313b;
  --text: #e7e9ee;
  --text-dim: #9aa1ad;
  --accent: #5b8cff;
  --pk: #ffb454;
  --fk: #6fd3a0;
  --line-color: #5b8cff;
  --surface: #262a33;
  --surface-hover: #2d313d;
  --input-bg: #0f1116;
  --row-line: #22252c;
  --item-bg: #181b21;
  --item-hover: #20242c;
  --grid-dot: #23262e;
  --err-bg: #3a1f22;
  --err-border: #6b2b30;
  --err-text: #ff9ba3;
  --danger: #ff8a8a;
  --on-accent: #0d1117;
  --accent-hover: #7aa0ff;
  --pk-row: rgba(255,180,84,0.08);
  --fk-row: rgba(111,211,160,0.06);
  --shadow: rgba(0,0,0,0.35);
  --shadow-strong: rgba(0,0,0,0.5);
  --glow: rgba(91,140,255,0.45);
  --backdrop: rgba(0,0,0,0.6);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f1f4f9;
  --panel: #ffffff;
  --border: #d5dbe6;
  --text: #1d2230;
  --text-dim: #667085;
  --accent: #3d6ae0;
  --pk: #b86e00;
  --fk: #1f8a58;
  --line-color: #3d6ae0;
  --surface: #eef1f7;
  --surface-hover: #e2e8f2;
  --input-bg: #ffffff;
  --row-line: #e6eaf2;
  --item-bg: #f8f9fc;
  --item-hover: #eef1f7;
  --grid-dot: #d6dce8;
  --err-bg: #fdecee;
  --err-border: #f3b5bb;
  --err-text: #b4232f;
  --danger: #c9302c;
  --on-accent: #ffffff;
  --accent-hover: #5a82ea;
  --pk-row: rgba(184,110,0,0.10);
  --fk-row: rgba(31,138,88,0.09);
  --shadow: rgba(30,40,70,0.12);
  --shadow-strong: rgba(30,40,70,0.22);
  --glow: rgba(61,106,224,0.35);
  --backdrop: rgba(20,25,40,0.45);
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}

.app {
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 340px;
  flex: 0 0 340px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar h1 {
  font-size: 18px;
  margin: 0 0 4px;
}

.hint {
  font-size: 12.5px;
  color: var(--text-dim);
  margin: 0 0 12px;
}

.hint code {
  background: var(--surface);
  padding: 1px 4px;
  border-radius: 4px;
}

#sql-input {
  flex: 0 0 260px;
  resize: vertical;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.5;
}

.error-box {
  margin-top: 10px;
  padding: 8px 10px;
  background: var(--err-bg);
  border: 1px solid var(--err-border);
  color: var(--err-text);
  border-radius: 6px;
  font-size: 12.5px;
}

.button-row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

button {
  font: inherit;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

button:hover { background: var(--surface-hover); }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  flex: 1;
}

button.primary:hover { background: var(--accent-hover); }

.file-label {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.file-label input { font-size: 12px; color: var(--text-dim); }

.stats-box {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--text-dim);
}

.legend {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.legend .col-badge {
  position: static;
  margin-right: 6px;
}

.legend-hint {
  margin-top: 6px;
  line-height: 1.4;
}

.canvas {
  flex: 1;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle, var(--grid-dot) 1px, transparent 1px) 0 0 / 22px 22px,
    var(--bg);
}

.erd-viewport {
  position: absolute;
  inset: 0;
  cursor: grab;
}

.erd-viewport.panning { cursor: grabbing; }

.erd-content {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

.erd-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 8000px;
  height: 8000px;
  pointer-events: none;
  overflow: visible;
}

.erd-link {
  fill: none;
  stroke: var(--line-color);
  stroke-width: 1.75;
  opacity: 0.85;
}

.table-box {
  position: absolute;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 6px 18px var(--shadow);
  overflow: hidden;
  user-select: none;
}

.table-box.dragging {
  box-shadow: 0 10px 28px var(--shadow-strong);
  border-color: var(--accent);
}

.table-header {
  background: var(--surface);
  padding: 9px 12px;
  font-weight: 600;
  font-size: 13px;
  cursor: grab;
  border-bottom: 1px solid var(--border);
}

.table-box.dragging .table-header { cursor: grabbing; }

.table-rows { padding: 2px 0; }

.table-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-size: 12px;
  border-bottom: 1px solid var(--row-line);
}

.table-row:last-child { border-bottom: none; }

.table-row.is-pk { background: var(--pk-row); }
.table-row.is-fk { background: var(--fk-row); }

.col-badge {
  width: 20px;
  flex: 0 0 20px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  text-align: center;
}

.table-row.is-pk .col-badge { color: var(--pk); }
.table-row.is-fk .col-badge { color: var(--fk); }

.col-name {
  flex: 1;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.col-type {
  color: var(--text-dim);
  font-size: 11px;
  white-space: nowrap;
}

.export-box {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.export-title { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--text-dim); margin-bottom: 8px; }

.table-tags {
  display: flex; flex-wrap: wrap; gap: 4px; align-items: center;
  padding: 4px 10px; min-height: 26px;
  border-bottom: 1px solid var(--border);
}
.tag-chip {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 10px; padding: 1px 6px 1px 8px; border-radius: 999px;
  color: var(--text); border: 1px solid var(--tag);
  background: color-mix(in srgb, var(--tag) 25%, transparent);
}
.tag-x { padding: 0 2px; border: none; background: none; font-size: 12px; line-height: 1; color: var(--text-dim); }
.tag-x:hover { background: none; color: var(--text); }
.tag-add { font-size: 10px; padding: 1px 7px; border-radius: 999px; border: 1px dashed var(--border); background: none; color: var(--text-dim); }
.tag-add:hover { color: var(--text); background: none; }
.tag-input { font: inherit; font-size: 10px; padding: 1px 6px; border-radius: 999px; border: 1px solid var(--accent); background: var(--bg); color: var(--text); outline: none; }

.table-box { transition: opacity .15s, box-shadow .15s; }
.table-box.dim { opacity: 0.18; }
.table-box.match { border-color: var(--accent); box-shadow: 0 0 0 2px var(--glow), 0 6px 18px var(--shadow); }
.erd-link { transition: opacity .15s; }
.erd-link.dim { opacity: 0.08; }

.search-input { width: 100%; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: 7px; padding: 8px 10px; font: inherit; font-size: 13px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tag-filter { font-size: 12px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--tag); background: color-mix(in srgb, var(--tag) 15%, transparent); }
.tag-filter:hover { background: color-mix(in srgb, var(--tag) 30%, transparent); }
.tag-filter.on { background: var(--tag); color: var(--on-accent); font-weight: 600; }
.tag-filter .n { opacity: .7; margin-left: 4px; }
.tag-empty { font-size: 12px; color: var(--text-dim); }

.table-title { pointer-events: none; }
.table-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.table-edit { padding: 0 6px; border: none; background: none; color: var(--text-dim); font-size: 13px; cursor: pointer; }
.table-edit:hover { background: none; color: var(--accent); }
.table-box.editing { border-color: var(--accent); }

.empty-state { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--text-dim); font-size: 14px; }

.table-list { display: flex; flex-direction: column; gap: 4px; }
.tbl-item { border: 1px solid var(--border); border-radius: 7px; background: var(--item-bg); transition: opacity .15s; }
.tbl-item.open { border-color: var(--accent); }
.tbl-item.dim { opacity: 0.35; }
.tbl-head { display: flex; align-items: center; }
.tbl-toggle { flex: 1; display: flex; align-items: center; gap: 8px; text-align: left; border: none; background: none; padding: 7px 10px; min-width: 0; }
.tbl-toggle:hover { background: var(--item-hover); }
.tbl-caret { color: var(--text-dim); width: 10px; }
.tbl-name { flex: 1; font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tbl-meta { font-size: 11px; color: var(--text-dim); }
.tbl-locate { border: none; background: none; padding: 7px 10px; color: var(--text-dim); }
.tbl-locate:hover { background: none; color: var(--accent); }
.tbl-body { padding: 0 10px 10px; }
.tbl-sql, #bulk-input {
  width: 100%; resize: vertical; background: var(--input-bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 7px; padding: 8px;
  font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; tab-size: 2;
}
button.danger { color: var(--danger); }

.modal { width: min(720px, 92vw); background: var(--panel); color: var(--text); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.modal::backdrop { background: var(--backdrop); }
.modal h2 { margin: 0 0 4px; font-size: 17px; }
#bulk-input { height: 46vh; }
.modal-actions { flex-wrap: wrap; }

.legend-hint { font-size: 12px; color: var(--text-dim); line-height: 1.4; margin-top: 8px; }
.tbl-caret { width: 0; height: 0; flex: 0 0 auto; border-left: 5px solid var(--text-dim); border-top: 4px solid transparent; border-bottom: 4px solid transparent; margin-right: 2px; }
.tbl-caret.is-open { border-left-color: transparent; border-top: 5px solid var(--text-dim); border-right: 4px solid transparent; border-left: 4px solid transparent; border-bottom: 0; }
.tbl-locate { font-size: 11px; }
.table-edit { font-size: 11px; }

.title-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 4px; }
.title-row h1 { margin: 0; }
.brand { display: flex; align-items: center; gap: 8px; min-width: 0; }
.brand img { border-radius: 7px; flex: 0 0 auto; }
.theme-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 7px; overflow: hidden; flex: 0 0 auto; }
.theme-toggle button { border: none; border-radius: 0; padding: 4px 9px; font-size: 12px; background: transparent; color: var(--text-dim); }
.theme-toggle button + button { border-left: 1px solid var(--border); }
.theme-toggle button:hover { background: var(--surface-hover); color: var(--text); }
.theme-toggle button[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); font-weight: 600; }

/* tags: picker + panel row */
.tbl-tags { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; padding: 0 10px 7px 28px; }
.tag-picker { position: fixed; z-index: 1000; width: 250px; background: var(--panel); border: 1px solid var(--border); border-radius: 9px; box-shadow: 0 10px 30px var(--shadow-strong); padding: 6px; }
.tag-picker-input { width: 100%; background: var(--input-bg); color: var(--text); border: 1px solid var(--border); border-radius: 6px; padding: 7px 9px; font: inherit; font-size: 13px; outline: none; }
.tag-picker-input:focus { border-color: var(--accent); }
.tag-picker-list { max-height: 220px; overflow-y: auto; margin-top: 6px; }
.tag-opt { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 6px; font-size: 13px; cursor: pointer; }
.tag-opt.active { background: var(--surface-hover); }
.tag-opt.create { color: var(--accent); font-weight: 600; }
.tag-dot { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 auto; }
.tag-opt-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tag-opt-n { font-size: 11px; color: var(--text-dim); }
.tag-picker-empty { padding: 8px; font-size: 12px; color: var(--text-dim); }
.tag-chip { font-size: 11px; }